(19)
(11)EP 3 229 538 B1

(12)EUROPEAN PATENT SPECIFICATION

(45)Mention of the grant of the patent:
10.06.2020 Bulletin 2020/24

(21)Application number: 14908789.2

(22)Date of filing:  25.12.2014
(51)International Patent Classification (IPC): 
H04W 72/04(2009.01)
(86)International application number:
PCT/CN2014/094995
(87)International publication number:
WO 2016/101221 (30.06.2016 Gazette  2016/26)

(54)

RESOURCE ALLOCATION METHOD, BASE STATION AND USER EQUIPMENT

RESSOURCENZUWEISUNGSVERFAHREN, BASISSTATION UND BENUTZERVORRICHTUNG

PROCÉDÉ D'ATTRIBUTION DE RESSOURCES, STATION DE BASE ET ÉQUIPEMENT D'UTILISATEUR


(84)Designated Contracting States:
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

(43)Date of publication of application:
11.10.2017 Bulletin 2017/41

(73)Proprietor: Huawei Technologies Co., Ltd.
Longgang District Shenzhen, Guangdong 518129 (CN)

(72)Inventors:
  • MA, Jie
    Shenzhen Guangdong 518129 (CN)
  • LIN, Bo
    Shenzhen Guangdong 518129 (CN)

(74)Representative: Epping - Hermann - Fischer 
Patentanwaltsgesellschaft mbH Schloßschmidstraße 5
80639 München
80639 München (DE)


(56)References cited: : 
WO-A1-2013/177183
CN-A- 103 916 968
CN-A- 103 442 409
CN-A- 103 974 419
  
  • LG ELECTRONICS INC: "D2D operation upon mobility", 3GPP DRAFT; R2-143736 [D2D-C] D2D OPERATION UPON MOBILITY, 3RD GENERATION PARTNERSHIP PROJECT (3GPP), MOBILE COMPETENCE CENTRE ; 650, ROUTE DES LUCIOLES ; F-06921 SOPHIA-ANTIPOLIS CEDEX ; FRANCE , vol. RAN WG2, no. Dresden, Germany; 20140818 - 20140822 9 August 2014 (2014-08-09), XP050820009, Retrieved from the Internet: URL:http://www.3gpp.org/ftp/tsg_ran/WG2_RL 2/TSGR2_87/Docs/ [retrieved on 2014-08-09]
  • ZTE: "Discussion on the ProSe authorised indication in X2 handover", 3GPP DRAFT; R3-141809, 3RD GENERATION PARTNERSHIP PROJECT (3GPP), MOBILE COMPETENCE CENTRE ; 650, ROUTE DES LUCIOLES ; F-06921 SOPHIA-ANTIPOLIS CEDEX ; FRANCE , vol. RAN WG3, no. Dresden, Germany; 20140818 - 20140822 8 August 2014 (2014-08-08), XP050821783, Retrieved from the Internet: URL:http://www.3gpp.org/ftp/tsg_ran/WG3_Iu /TSGR3_85/Docs/ [retrieved on 2014-08-08]
  • ZTE: "Solution for ProSe discovery and communication", 3GPP DRAFT; S2-130979-ZTE_ARCH ALT FOR PROSE, 3RD GENERATION PARTNERSHIP PROJECT (3GPP), MOBILE COMPETENCE CENTRE ; 650, ROUTE DES LUCIOLES ; F-06921 SOPHIA-ANTIPOLIS CEDEX ; FRANCE , vol. SA WG2, no. San Diego, USA; 20130408 - 20130412 2 April 2013 (2013-04-02), XP050708226, Retrieved from the Internet: URL:http://www.3gpp.org/ftp/tsg_sa/WG2_Arc h/TSGS2_96_San_Diego/Docs/ [retrieved on 2013-04-02]
  
Note: Within nine months from the publication of the mention of the grant of the European patent, any person may give notice to the European Patent Office of opposition to the European patent granted. Notice of opposition shall be filed in a written reasoned statement. It shall not be deemed to have been filed until the opposition fee has been paid. (Art. 99(1) European Patent Convention).


Description

TECHNICAL FIELD



[0001] The present invention relates to communications technologies, and in particular, to a resource allocation method, a base station, and user equipment.

BACKGROUND



[0002] In recent years, with rapid development of wireless communications technologies, a quantity of wireless users increases sharply, and a service requirement also increases sharply. As various new wireless services emerge, people have a higher requirement on a communication rate. However, spectrum resources applicable to wireless communication are limited. Therefore, to provide a high enough data communication rate by using the limited spectrum resources to meet a user requirement, it is extremely important to improve spectrum utilization.

[0003] Currently, in a frequency division duplex (FDD) system, a mobile broadband (MBB) service is obviously asymmetrical, and a downlink service volume is three times an uplink service volume. Consequently, downlink spectrum resources are not sufficient, while uplink spectrum resources are usually in an idle state.

[0004] Therefore, how to maximize utilization of spectrum resources for service transmission is a problem to be resolved in the present invention.

[0005] 3GPP Document for Discussion R2-143736 discusses some details on D2D operation upon mobility. Specifically, it proposes that upon cell selection/reselection being triggered, UE should be allowed to keep using the D2D configuration (e.g. transmitting D2D) received from the previous cell and other information until cell selection/reselection is completed, i.e. until acquiring system information of the cell. From the definition of "serving cell" in TS 36.304, these UE behaviors are in line with that.

[0006] 3GPP Document for Discussion and Approval R3-141809 discloses that, when the ProSe Authorized IE is signalled in the X2 HANDOVER REQUEST message, the target eNB may allocate the D2D resource during X2 handover preparation phase. Suppose the UE is configured to use the Type 1/Mode 2 transmission resource pool both in the source and target eNBs. If the transmission resource pools allocated by the source eNB and target eNB are same, then there will be no handover of the D2D transmission resource, and therefore the D2D discovery/communication transmission will not be interrupted. If the transmission resource pools allocated by the source eNB and target eNB are different, assuming that the D2D related information including the D2D resource configuration and the D2D context is forwarded from the source to target eNB, then the UE may select the resources from the transmission resource pool allocated by the target eNB which is included in the RRCConnectionReconfiguration message from the source eNB, and use them for the D2D discovery/communication transmission.

[0007] 3GPP Document for Discussion and Approval S2-130979 proposes a new solution for ProSe operational aspects designed to maximize the reuse of the existing 3GPP network entities and interfaces to support ProSe feature for both restricted and open ProSe discovery and communication under the in-coverage scenarios. In this architecture, the key control function, i.e. ProSe function, is an added logical function to the MME which already supports many compatible capabilities that can be extended to support the ProSe operational requirements and to interact with the ProSe capable UE - e.g. security, mobility, paging and idle control, bearer control and subscription management and lawful interception support.

SUMMARY



[0008] The invention is defined by the independent claims. Embodiments are defined by the dependent claims. Embodiments of the present invention provide resource allocation methods, user equipment and base stations as defined in the attached set of claims, so as to resolve a prior-art technical problem of low resource utilization.

[0009] According to the resource allocation methods, the base station, and the user equipment provided in the embodiments of the present invention, a second base station receives resource configuration information of a first base station, and sends the resource configuration information of the first base station to UE, so that the UE performs D2D communication with the second base station or a core network by using a resource configured by using the resource configuration information of the first base station. Therefore, an uplink resource or a downlink resource of the first base station can be reused by the UE, thereby improving resource utilization of a communications system.

BRIEF DESCRIPTION OF DRAWINGS



[0010] The invention is defined by the claims. In the following, parts of the description and drawings referring to embodiments which are not covered by the claims are not presented as embodiments of the invention, but as examples useful for understanding the invention.

[0011] To describe the technical solutions in the embodiments of the present invention or in the prior art more clearly, the following briefly describes the accompanying drawings required for describing the embodiments or the prior art. Apparently, the accompanying drawings in the following description show some embodiments of the present invention, and persons of ordinary skill in the art may still derive other drawings from these accompanying drawings without creative efforts.

FIG. 1 is a schematic flowchart of Embodiment 1 of a resource allocation method according to the present invention;

FIG. 2 is a schematic flowchart of Embodiment 2 of a resource allocation method according to the present invention;

FIG. 3 is a schematic flowchart of Embodiment 3 of a resource allocation method according to the present invention;

FIG. 4 is a schematic diagram of a protocol stack according to the present invention;

FIG. 5 is a schematic flowchart of Embodiment 4 of a resource allocation method according to the present invention;

FIG. 6 is a schematic flowchart of Embodiment 5 of a resource allocation method according to the present invention;

FIG. 7 is a schematic flowchart of Embodiment 6 of a resource allocation method according to the present invention;

FIG. 8 is a schematic flowchart of Embodiment 8 of a resource allocation method according to the present invention;

FIG. 9 is a schematic flowchart of Embodiment 9 of a resource allocation method according to the present invention;

FIG. 10 is a schematic flowchart of Embodiment 10 of a resource allocation method according to the present invention;

FIG. 11 is a schematic flowchart of Embodiment 11 of a resource allocation method according to the present invention;

FIG. 12 is a schematic flowchart of Embodiment 12 of a resource allocation method according to the present invention;

FIG. 13 is a schematic flowchart of Embodiment 13 of a resource allocation method according to the present invention;

FIG. 14 is a schematic flowchart of Embodiment 14 of a resource allocation method according to the present invention;

FIG. 15 is a schematic flowchart of Embodiment 15 of a resource allocation method according to the present invention;

FIG. 16 is a signaling flowchart of Embodiment 16 of a resource allocation method according to the present invention;

FIG. 17 is a signaling flowchart of Embodiment 17 of a resource allocation method according to the present invention;

FIG. 18A and FIG. 18B are a signaling flowchart of Embodiment 18 of a resource allocation method according to the present invention;

FIG. 19A and FIG. 19B are a signaling flowchart of Embodiment 19 of a resource allocation method according to the present invention;

FIG. 20 is a schematic flowchart of Embodiment 20 of a resource allocation method according to the present invention;

FIG. 21 is a schematic diagram of another protocol stack according to the present invention;

FIG. 22 is a schematic diagram of another protocol stack according to the present invention;

FIG. 23 is a schematic diagram of another protocol stack according to the present invention;

FIG. 24 is a schematic structural diagram of Embodiment 1 of a base station according to the present invention;

FIG. 25 is a schematic structural diagram of Embodiment 3 of a base station according to the present invention;

FIG. 26 is a schematic structural diagram of Embodiment 1 of user equipment according to the present invention;

FIG. 27 is a schematic structural diagram of Embodiment 2 of user equipment according to the present invention;

FIG. 28 is a schematic structural diagram of Embodiment 4 of a base station according to the present invention;

FIG. 29 is a schematic structural diagram of Embodiment 5 of a base station according to the present invention;

FIG. 30 is a schematic structural diagram of Embodiment 7 of a base station according to the present invention;

FIG. 31 is a schematic structural diagram of Embodiment 3 of user equipment according to the present invention;

FIG. 32 is a schematic structural diagram of Embodiment 4 of user equipment according to the present invention; and

FIG. 33 is a schematic structural diagram of Embodiment 8 of a base station according to the present invention.


DESCRIPTION OF EMBODIMENTS



[0012] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the following clearly and completely describes the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Apparently, the described embodiments are some but not all of the embodiments of the present invention. All other embodiments obtained by persons of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0013] A terminal involved in this application, that is, user equipment, may be a wireless terminal or a wired terminal. The wireless terminal may refer to a device that provides a user with voice and/or data connectivity, a handheld device with a wireless connection function, or another processing device connected to a radio modem. The wireless terminal may communicate with one or more core networks by using a radio access network (such as radio access network (RAN)). The wireless terminal may be a mobile terminal, such as a mobile phone (or referred to as a "cellular" phone) and a computer with a mobile terminal, for example, may be a portable, pocket-sized, handheld, computer built-in, or in-vehicle mobile apparatus, which exchanges voice and/or data with the radio access network. For example, the wireless terminal is a device such as a personal communication service (PCS) phone, a cordless telephone set, a session initiation protocol (SIP) phone, a wireless local loop (WLL) station, or a personal digital assistant (PDA). The wireless terminal may also be referred to as a system, a subscriber unit, a subscriber station, a mobile station, a mobile terminal, a remote station, an access point, a remote terminal, an access terminal, a user terminal, a user agent, a user device, or user equipment.

[0014] A base station (for example, an access point) involved in this application may refer to a device in communication with a wireless terminal by using one or more sectors at an air interface in an access network. The base station may be configured to mutually convert a received over-the-air frame and an IP packet and serve as a router between the wireless terminal and a remaining portion of the access network. The remaining portion of the access network may include an Internet protocol (IP) network. The base station may coordinate attribute management of the air interface. For example, the base station may be a base transceiver station (BTS) in GSM or CDMA, may be a NodeB in WCDMA, or may be an evolved NodeB (NodeB, eNB, or e-NodeB, evolutional NodeB) in LTE. This is not limited in this application.

[0015] The embodiments of the present invention relate to a heterogeneous network scenario. A network architecture of the scenario may include a macro base station, at least one micro base station, and at least one UE. There is an X2 interface logical connection between the macro base station and the micro base station. An S1 connection is established between the macro base station and a core network. The micro base station may establish an S1 connection to the core network, or may not establish an S1 connection to the core network. In addition, a connection between the UE and the micro base station related to the embodiments of the present invention is a device-to-device (D2D) connection. That is, in the embodiments of the present invention, no matter whether signaling is transmitted or data is exchanged between the micro base station and the UE, a mode of communication between the micro base station and the UE is a D2D communication mode, and the micro base station and/or the UE may reuse an uplink resource or a downlink resource of the macro base station, thereby improving resource utilization of an entire communications system. For a specific implementation process of the present invention, refer to the following embodiments. In the following embodiments, a first base station is a macro base station, and a second base station is a micro base station. There may be one or more second base stations, and each second base station performs same operations.

[0016] FIG. 1 is a schematic flowchart of Embodiment 1 of a resource allocation method according to the present invention. This embodiment relates to a specific process in which a second base station is capable of performing D2D communication with UE, and the second base station sends resource configuration information of a first base station to the UE. As shown in FIG. 1, the method includes the following steps.

[0017] S101: The second base station receives resource configuration information of the first base station.

[0018] Optionally, the first base station may periodically send the resource configuration information of the first base station to the second base station, or may send the resource configuration information of the first base station to the second base station after detecting that the second base station supports D2D communication, or may send the resource configuration information of the first base station to the second base station in another trigger manner. Therefore, the second base station may periodically receive the resource configuration information of the first base station; or may receive the resource configuration information of the first base station at a time and perform D2D communication in a preset time period by using a resource configured by using the resource configuration information of the first base station, and after the preset time period elapses, release the resource configured by using the resource configuration information of the first base station.

[0019] S102: The second base station sends the resource configuration information of the first base station to the UE, where the resource configuration information of the first base station is used to configure a resource for device-to-device (D2D) communication between the UE and the second base station.

[0020] Specifically, after receiving the resource configuration information of the first base station sent by the first base station, the second base station may perform parsing processing, decoding processing, or the like on the resource configuration information of the first base station, or may convert the resource configuration information of the first base station into information in a format that can be identified by the UE, and send the information in this format to the UE, so that the UE can determine, according to the resource configuration information, the resource required for D2D communication between the UE and the second base station. It should be noted that in this embodiment, the UE supports D2D communication, and the second base station also supports D2D communication by default. Therefore, a mode of communication between the UE and the second base station is a D2D communication mode.

[0021] After receiving the resource configuration information of the first base station, the UE may determine the resource for D2D communication with the second base station according to the resource configuration information of the first base station. Optionally, the resource may be an uplink resource of the first base station, or may be a downlink resource of the first base station. Optionally, the resource configuration information of the first base station may further include a physical resource block parameter. The UE may learn of, according to the physical resource block parameter, a data or signaling format used when the UE performs D2D communication with a core network or another network element device, so as to perform data transmission or signaling interaction with the core network or the another network element device in a D2D communication mode by using the resource configured by using the resource configuration information of the first base station. That is, in this embodiment of the present invention, the uplink resource or the downlink resource of the first base station can be reused by the UE that performs D2D communication with the second base station, thereby improving resource utilization of a communications system.

[0022] According to the resource allocation method provided in this embodiment of the present invention, a second base station receives resource configuration information of a first base station, and sends the resource configuration information of the first base station to UE, so that the UE performs D2D communication with the second base station or a core network by using a resource configured by using the resource configuration information of the first base station. Therefore, an uplink resource or a downlink resource of the first base station can be reused by the UE, thereby improving resource utilization of a communications system.

[0023] Based on the foregoing embodiment shown in FIG. 1, Embodiment 2 of the present invention relates to a specific process in which a first base station learns that a second base station supports D2D communication. As shown in FIG. 2, further, before S101, the method further includes the following steps.

[0024] S201: The second base station notifies the first base station that the second base station supports D2D communication.

[0025] Specifically, the second base station detects whether the second base station has a D2D communication capability. Optionally, the second base station may detect whether a D2D module is installed on the second base station, to determine whether the second base station has a D2D communication capability. The D2D module may be a physical board, or may be a program supporting D2D communication. That is, during initial deployment of an entire network architecture, a physical board with a D2D communication capability may be deployed on the second base station, or a program supporting a D2D communication capability may be loaded into the second base station.

[0026] Optionally, when detecting that the second base station supports D2D communication, the second base station may send indication information to the first base station. After receiving the indication information, the first base station learns that the second base station supports D2D communication. The indication information may be reported to the first base station by using RRC signaling, or may be reported to the first base station by using other signaling. A form of the indication information is not limited in this embodiment of the present invention provided that after receiving the indication information, the first base station learns that the second base station supports D2D communication. Optionally, the second base station may notify an operation, administration and maintenance (OAM) console that the second base station supports a D2D communication capability, or an OAM console actively detects whether the second base station supports D2D communication, so that when the OAM console learns that the second base station supports D2D communication, an operation and management personnel can perform corresponding configuration on the first base station by using the OAM console. Therefore, the first base station learns that the second base station supports D2D communication, and further sends the resource configuration information of the first base station to the second base station. Optionally, when learning that the second base station supports D2D communication, the first base station may instruct the second base station to communicate with a D2D terminal to establish a D2D cell. In this case, the second base station may be considered as a cellular straight-through terminal with a D2D communication capability, and may communicate with the D2D terminal in a D2D communication mode. Therefore, the first base station may send another piece of indication information to the second base station, and the indication information may carry a resource of the first base station. Optionally, the resource of the first base station may be a time-frequency domain resource range, such as physical resource blocks with indexes 4 to 54 in a frequency domain, and each subframe in a time domain; or all physical resource blocks in a frequency domain, and subframes with subframe indexes 0 to 4 in each subframe in a time domain. After receiving the indication information, the second base station may send the resource configuration information of the first base station to the UE by using the resource of the first base station carried in the indication information. That is, the resource configuration information of the first base station may be directly sent by the first base station to the second base station, or the first base station sends indication information to the second base station, and the second base station sends the resource configuration information of the first base station to the UE according to the indication information.

[0027] Optionally, the second base station may send the resource configuration information of the first base station to the UE by using a downlink resource of the second base station, or may send the resource configuration information of the first base station to the UE by using a resource configured by using the resource configuration information of the first base station. It should be noted that, the UE is UE that is determined by the second base station and that meets a preset condition of performing D2D communication with the second base station, and a communication mode used during interaction between the UE and the second base station is a D2D communication mode. Optionally, the preset condition, met by the UE, of performing D2D communication with the second base station may be: received strength of a signal received by the UE meets a preset threshold, or received strength of a signal received by the UE meets a signal to interference plus noise ratio threshold for demodulating a signal by the UE, or a distance between the UE and the second base station meets a particular condition, or the like. FIG. 3 is a schematic flowchart of Embodiment 3 of a resource allocation method according to the present invention. This embodiment relates to a specific process in which a second base station sends resource configuration information of a first base station to UE. This embodiment is applied to a scenario in which an S1 connection is established between the second base station and a core network, and a D2D mode is used for communication between the second base station and the UE. As shown in FIG. 3, the method specifically includes the following steps.

[0028] S301: The second base station notifies the first base station that the second base station supports D2D communication.

[0029] S302: The second base station receives resource configuration information of the first base station.

[0030] Specifically, for S301, refer to an execution process of S201 in Embodiment 2, and for S302, refer to an execution process of S101 in Embodiment 1. Details are not repeatedly described herein.

[0031] S303: The second base station sends a reference signal to the UE, where the reference signal is used to instruct the UE to send a setup request message.

[0032] Specifically, after receiving the resource configuration information of the first base station, the second base station sends the reference signal to the UE, to instruct the UE to send the setup request message. Optionally, the second base station may send the reference signal by using an uplink resource of the second base station, or may send the reference signal by using a resource configured by using the resource configuration information of the first base station. The resource configured by using the resource configuration information of the first base station includes an uplink resource of the first base station and/or a downlink resource of the first base station. Optionally, after receiving the resource configuration information of the first base station, the second base station may further send an acknowledgement to the first base station, to notify the first base station that the second base station has successfully received the resource configuration information of the first base station. Optionally, the reference signal may be carried in a broadcast message to be sent to the UE in a broadcast manner.

[0033] S304: The second base station receives the setup request message, where the setup request message is used to request the second base station to send the resource configuration information of the first base station to the UE, the setup request message is an RRC connection setup request message, and the setup request message is directly sent by the UE to the second base station.

[0034] Specifically, the first base station adds, to a first message, information indicating that the second base station supports D2D communication, and broadcasts the first message. After receiving the first message, the UE learns that the second base station supports D2D communication. Then, the UE receives and measures signal received strength of the reference signal sent by the second base station, and determines whether the signal received strength of the reference signal meets a preset condition of performing D2D communication with the second base station. Optionally, the preset condition may be: received strength of a signal received by the UE meets a preset threshold, or received strength of a signal received by the UE meets a signal to interference plus noise ratio threshold for demodulating a signal by the UE, or a distance between the UE and the second base station meets a particular condition, or the like.

[0035] When the UE determines that the signal received strength of the reference signal meets the preset condition, the UE determines that the UE supports D2D communication with the second base station. Therefore, when the UE needs to perform service interaction with the second base station, the UE sends the setup request message to the second base station. The setup request message is used to request the second base station to send the resource configuration information of the first base station to the UE. In this embodiment, the setup request message may be an RRC connection setup request message. It should be noted that, the UE is actually a D2D terminal in this case.

[0036] S305: The second base station sends a setup response message to the UE, where the setup response message includes the resource configuration information of the first base station, and the setup response message is an RRC connection setup response message.

[0037] Specifically, that the UE sends the setup request message (that is, the RRC connection setup request message) to the second base station actually means that the UE initiates an RRC connection to the second base station. Specifically, the UE sends a to the second base station, and the second base station sends a random access channel response (RAR) message to the UE after receiving the preamble. Then, the UE sends the RRC connection setup request message to the second base station, and the second base station determines, according to the RRC connection setup request message, that the UE supports D2D communication with the second base station. Therefore, the second base station sends the setup response message to the UE. The setup response message is an RRC connection setup response message, and the RRC connection setup response message includes the resource configuration information of the first base station. Optionally, the second base station may establish an RRC connection to the UE by using a downlink resource of the second base station, or may establish an RRC connection to the UE by using the resource configured by using the resource configuration information of the first base station.

[0038] Further, when the second base station establishes the RRC connection to the UE, the second base station further establishes an S1 connection to a core network, so that the UE performs, by using the resource configured by using the resource configuration information of the first base station, data interaction with the core network by using the second base station.

[0039] It should be noted that, no matter whether the UE establishes an RRC connection to the second base station or the UE performs data interaction with the core network by using the second base station, a protocol stack shown in FIG. 4 can be used in a process in which the UE performs D2D communication with the second base station.

[0040] According to the resource allocation method provided in this embodiment of the present invention, after notifying a first base station that a second base station supports D2D communication, the second base station receives resource configuration information of the first base station, and establishes an RRC connection to UE. In a process of establishing the RRC connection, the second base station adds the resource configuration information of the first base station to an RRC connection setup response message, and sends the RRC connection setup response message to the UE, so that the UE communicates with a network element device by using a resource configured by using the resource configuration information of the first base station. According to the method provided in this embodiment of the present invention, the second base station configures a resource of the first base station for the UE that performs D2D communication with the second base station, so that the resource of the first base station can be reused by the UE and the second base station, thereby improving resource utilization of a communications system.

[0041] FIG. 5 is a schematic flowchart of Embodiment 4 of a resource allocation method according to the present invention. This embodiment relates to another specific process in which a second base station sends resource configuration information of a first base station to UE. This embodiment is applied to a scenario in which an S1 connection is established between the second base station and a core network, and a D2D mode is used for communication between the second base station and the UE. As shown in FIG. 5, the method specifically includes the following steps.

[0042] S401: The second base station notifies the first base station that the second base station supports D2D communication.

[0043] S402: The second base station receives resource configuration information of the first base station.

[0044] Specifically, for S401, refer to an execution process of S201 in Embodiment 2, and for S402, refer to an execution process of S101 in Embodiment 1. Details are not repeatedly described herein.

[0045] S403: The second base station sends a reference signal to the UE, where the reference signal is used to instruct the UE to send a setup request message.

[0046] Specifically, after receiving the resource configuration information of the first base station, the second base station sends the reference signal to the UE, to instruct the UE to send the setup request message. Optionally, the second base station may send the reference signal by using an uplink resource of the second base station, or may send the reference signal by using a resource configured by using the resource configuration information of the first base station. The resource configured by using the resource configuration information of the first base station includes an uplink resource of the first base station and/or a downlink resource of the first base station. Optionally, after receiving the resource configuration information of the first base station, the second base station may further send an acknowledgement to the first base station, to notify the first base station that the second base station has successfully received the resource configuration information of the first base station. Optionally, the reference signal may be carried in a broadcast message to be sent to the UE in a broadcast manner.

[0047] S404: The second base station receives the setup request message, where the setup request message is sent by the UE to the second base station by using the first base station, the setup request message is used to request the second base station to send the resource configuration information of the first base station to the UE, the setup request message includes an identifier of the UE and first indication information, the first indication information is used to notify the second base station that the UE supports D2D communication with the second base station, and the setup request message is an RRC connection setup request message.

[0048] Specifically, the first base station adds, to a first message, information indicating that the second base station supports D2D communication, and broadcasts the first message. After receiving the first message, the UE learns that the second base station supports D2D communication. Then, the UE receives and measures signal received strength of the reference signal sent by the second base station, and determines whether the signal received strength of the reference signal meets a preset condition of performing D2D communication with the second base station. Optionally, the preset condition may be: received strength of a signal received by the UE meets a preset threshold, or received strength of a signal received by the UE meets a signal to interference plus noise ratio threshold for demodulating a signal by the UE, or a distance between the UE and the second base station meets a particular condition, or the like. When the UE determines that the signal received strength of the reference signal received by the UE meets the preset condition, the UE determines that the UE supports D2D communication with the second base station. It should be noted that, the UE is actually a D2D terminal in this case.

[0049] A difference between this embodiment and Embodiment 2 lies in that when the UE determines that the UE can perform D2D communication with the second base station, the UE sends the setup request message to the first base station in this case, and then the first base station sends the setup request message to the second base station. In this embodiment, the setup request message is an RRC connection setup request message. That is, in this embodiment, the UE initiates an RRC connection setup request to the first base station. Specifically, the UE sends a preamble to the first base station, and the first base station sends an RAR message to the UE after receiving the preamble. Then, the UE sends the RRC connection setup request message to the first base station, and adds the identifier of the UE and the first indication information to the RRC connection setup request message, so that the first base station learns that the UE meets the preset condition of performing D2D communication with the second base station. Therefore, the first base station sends the received RRC connection setup request message to the second base station, so that the second base station learns, according to the first indication information and the identifier of the UE, that the UE supports D2D communication with the second base station. S405: The second base station sends a setup response message to the UE according to the identifier of the UE, where the setup response message includes the resource configuration information of the first base station, and the setup response message is an RRC connection setup response message.

[0050] Specifically, after receiving the RRC connection setup request message that is sent by the first base station and that carries the identifier of the UE and the first indication information, the second base station adds the obtained resource configuration information of the first base station to the RRC connection setup response message, and sends the RRC connection setup response message to the UE. Optionally, the second base station may send the RRC connection setup response message to the UE by using a downlink resource of the second base station, or may send the RRC connection setup response message to the UE by using a resource of the first base station.

[0051] Further, when the second base station sends the RRC connection setup response message to the UE, the second base station further establishes an S1 connection to a core network, so that the UE can perform, by using the resource of the first base station, data interaction with the core network by using the second base station.

[0052] It should be noted that, no matter whether the second base station sends the RRC connection setup response message to the UE or the UE performs data interaction with the core network by using the second base station, a protocol stack shown in FIG. 4 can be used in a process in which the UE performs D2D communication with the second base station.

[0053] According to the resource allocation method provided in this embodiment of the present invention, a second base station sends first indication information to a first base station, so that the first base station sends resource configuration information of the first base station to the second base station after learning that the second base station supports D2D communication. After learning, by using an RRC connection setup request message that is sent by the first base station and that carries an identifier of UE and the first indication information, that the UE supports D2D communication with the second base station, the second base station sends the resource configuration information of the first base station to the UE according to the identifier of the UE, so that the UE communicates with a network element device by using a resource configured by using the resource configuration information of the first base station. According to the method provided in this embodiment of the present invention, the second base station configures a resource of the first base station for the UE that performs D2D communication with the second base station, so that an uplink resource of the first base station can be reused by the UE and the second base station, thereby improving resource utilization of a communications system.

[0054] FIG. 6 is a schematic flowchart of Embodiment 5 of a resource allocation method according to the present invention. This embodiment relates to another specific process in which a second base station sends resource configuration information of a first base station to UE. This embodiment is applied to a scenario in which an S1 connection is established between the second base station and a core network, and a D2D mode is used for communication between the second base station and the UE. As shown in FIG. 6, the method specifically includes the following steps.

[0055] S501: The second base station notifies the first base station that the second base station supports D2D communication.

[0056] S502: The second base station receives resource configuration information of the first base station.

[0057] Specifically, for S501, refer to an execution process of S201 in Embodiment 2, and for S502, refer to an execution process of S101 in Embodiment 1. Details are not repeatedly described herein.

[0058] S503. The second base station receives identifier information of the UE sent by the first base station, where the identifier information of the UE is used to notify the second base station that the UE supports D2D communication with the second base station.

[0059] Specifically, after receiving the resource configuration information of the first base station, the second base station may send a reference signal. Optionally, the reference signal may be carried in a broadcast message to be sent in a broadcast manner. Optionally, the second base station may broadcast the reference signal by using an uplink resource of the second base station, or may send the reference signal by using a resource configured by using the resource configuration information of the first base station. Optionally, after receiving the resource configuration information of the first base station, the second base station may further send an acknowledgement to the first base station, to notify the first base station that the second base station has successfully received the resource configuration information of the first base station.

[0060] Further, the first base station adds, to a first message, information indicating that the second base station supports D2D communication, broadcasts the first message, and instructs, by using the first message, the UE not to actively receive the reference signal sent by the second base station. Therefore, after the UE receives the first message broadcasted by the first base station, the UE initiates a cellular connection establishment process to the first base station. For a specific establishment process, refer to the prior art. Details are not described herein. Then, the first base station sends a measurement instruction to the UE, to instruct the UE to measure signal received strength of the reference signal sent by the second base station. After measuring the signal received strength of the reference signal sent by the second base station, the UE sends the signal received strength of the reference signal to the first base station, so that the first base station determines, according to the signal received strength of the reference signal, whether the UE meets a preset condition of performing D2D communication with the second base station.

[0061] When the first base station determines, according to the signal received strength of the reference signal, that the UE meets the preset condition of performing D2D communication with the second base station, the first base station sends identifier information of the UE to the second base station, so that the second base station determines, according to the identifier information of the UE, that the UE supports D2D communication with the second base station. In addition, the first base station further adds a first identifier to second indication information, and sends the second indication information to the UE, so that the UE learns that the UE currently is supposed to perform D2D communication with the second base station corresponding to the first identifier (there may be multiple second base stations in an actual scenario, the first base station determines that the UE meets a preset condition of performing D2D communication with the multiple second base stations, and the first base station controls the UE to currently perform D2D communication with a specific base station or several specific base stations, and therefore, the first base station notifies the UE of an identifier of a second base station that currently is to perform D2D communication with the UE).

[0062] S504: The second base station sends the resource configuration information of the first base station to the UE according to the identifier information of the UE.

[0063] Specifically, after the second base station determines, according to the identifier information of the UE, that the UE supports D2D communication with the second base station, the second base station sends the resource configuration information of the first base station to the UE. Optionally, the second base station may send the resource configuration information of the first base station to the UE by using a downlink resource of the second base station, or may send the resource configuration information of the first base station to the UE by using a resource of the first base station.

[0064] Optionally, the second base station may forward the resource configuration information of the first base station to the UE by using the first base station.

[0065] Optionally, after receiving the second indication information sent by the first base station, the UE initiates an RRC connection to the second base station corresponding to the first identifier carried in the second indication information. That is, the UE sends an RRC connection setup request message to the second base station corresponding to the first identifier. Because the second base station has learned, according to the identifier information of the UE, that the UE supports D2D communication with the second base station, the second base station receives the RRC connection setup request message sent by the UE, adds the resource configuration information of the first base station to an RRC connection setup response message, and sends the RRC connection setup response message to the UE.

[0066] According to the resource allocation method provided in this embodiment of the present invention, a second base station sends first indication information to a first base station, so that after learning that the second base station supports D2D communication, the first base station sends resource configuration information of the first base station to the second base station. After determining, by using identifier information of UE sent by the first base station, that the UE supports D2D communication with the second base station, the second base station sends the resource configuration information of the first base station to the UE according to the identifier information of the UE, so that the UE communicates with a network element device by using a resource configured by using the resource configuration information of the first base station. According to the method provided in this embodiment of the present invention, the second base station configures a resource of the first base station for the UE that performs D2D communication with the second base station, so that the resource of the first base station can be reused by the UE and the second base station, thereby improving resource utilization of a communications system.

[0067] FIG. 7 is a schematic flowchart of Embodiment 6 of a resource allocation method according to the present invention. This embodiment relates to another specific process in which a second base station serves as a second serving cell of UE, and the second base station sends resource configuration information of a first base station to the UE. This embodiment is applied to a master-slave eNB aggregation (MSA) scenario in which the first base station obtains data from a core network, then directly sends a part of the data to the UE, and sends the other part of the data to the UE by using the second base station, and a mode of communication between the second base station and the UE is a D2D communication mode. As shown in FIG. 7, the method includes the following steps.

[0068] S601: The second base station notifies the first base station that the second base station supports D2D communication.

[0069] S602: The second base station receives resource configuration information of the first base station.

[0070] Specifically, for S601, refer to an execution process of S201 in Embodiment 2, and for S602, refer to an execution process of S101 in Embodiment 1. Details are not repeatedly described herein.

[0071] S603: The second base station receives identifier information of the UE sent by the first base station, where the identifier information of the UE is used to notify the second base station that the UE supports D2D communication with the second base station, and is used to indicate that the second base station serves as a second serving cell of the UE.

[0072] Specifically, after receiving the resource configuration information of the first base station, the second base station may send a reference signal. Optionally, the reference signal may be carried in a broadcast message to be sent in a broadcast manner. Optionally, the second base station may broadcast the reference signal by using an uplink resource of the second base station, or may send the reference signal by using a resource configured by using the resource configuration information of the first base station. Optionally, after receiving the resource configuration information of the first base station, the second base station may further send an acknowledgement to the first base station, to notify the first base station that the second base station has successfully received the resource configuration information of the first base station.

[0073] Further, the first base station adds, to a first message, information indicating that the second base station supports D2D communication, broadcasts the first message, and instructs, by using the first message, the UE not to actively receive the reference signal sent by the second base station. Therefore, after the UE receives the first message broadcasted by the first base station, the UE initiates a cellular connection establishment process to the first base station. For a specific establishment process, refer to the prior art. Details are not described herein. Then, the first base station sends a measurement instruction to the UE, to instruct the UE to measure signal received strength of the reference signal sent by the second base station. After measuring the signal received strength of the reference signal sent by the second base station, the UE sends the signal received strength of the reference signal to the first base station, so that the first base station determines, according to the signal received strength of the reference signal, whether the UE meets a preset condition of performing D2D communication with the second base station.

[0074] When the first base station determines, according to the signal received strength of the reference signal, that the UE meets the preset condition of performing D2D communication with the second base station, the first base station sends the identifier information of the UE to the second base station. Therefore, the second base station determines, according to the identifier information of the UE, that the UE can perform D2D communication with the second base station, and the second base station further learns, according to the identifier information of the UE, that the second base station serves the UE as the second serving cell of the UE in this case (the first base station serves the UE as a first serving cell of the UE). That is, the second base station notifies the UE how to perform sorting or combination processing on received data sent by the second base station and received data sent by the first base station, or notifies the UE of information such as an order of sending data by the second base station, so that the UE can sort and combine a received part of data sent by the first base station and the other received part of data sent by the second base station, to obtain complete data.

[0075] In addition, the first base station further adds a first identifier to second indication information, and sends the second indication information to the UE, so that the UE learns that the UE currently is supposed to perform D2D communication with the second base station corresponding to the first identifier (there may be multiple second base stations in an actual scenario, the first base station determines that the UE meets a preset condition of performing D2D communication with the multiple second base stations, and the first base station controls the UE to currently perform D2D communication with a specific base station or several specific base stations, and therefore, the first base station notifies the UE of an identifier of a second base station that currently is to perform D2D communication with the UE).

[0076] S604: The second base station sends the resource configuration information of the first base station to the UE according to the identifier information of the UE.

[0077] For details, refer to S504 in Embodiment 5. Details are not repeatedly described herein.

[0078] S605: The second base station receives data sent by the first base station.

[0079] Specifically, the data may be service information, signaling, a message, or data of another type. S606: The second base station sends the data to the UE according to a resource configured by using the resource configuration information of the first base station.

[0080] It should be noted that, because the second base station already serves the UE as the second serving cell of the UE, after receiving the data that is sent by the second base station by using the resource configured by using the resource configuration information of the first base station, the UE may learn, by using the second base station, how to perform sorting or combination processing on the received data sent by the second base station and the received data sent by the first base station, so as to obtain complete data. The resource configured by using the resource configuration information of the first base station may be an uplink resource of the first base station, or may be a downlink resource of the first base station. In addition, resources of the first base station that are mentioned in all the foregoing embodiments refer to the resource configured by using the resource configuration information of the first base station.

[0081] Optionally, when receiving the data sent by the second base station, the UE sends an acknowledgement feedback to the second base station. The acknowledgement feedback may be sent in the following several manners:

Manner 1: No matter whether there is a physical connection between the second base station and a core network, the UE uses only a D2D link between the UE and the second base station to send the acknowledgement feedback to the second base station; the second base station transmits the acknowledgement feedback to the first base station, and then the first base station sends the acknowledgement feedback to the core network.

Manner 2: When there is a physical connection between the second base station and a core network, the UE uses only a D2D link to transmit the acknowledgement feedback to the second base station, and then the second base station transmits the acknowledgement feedback to the core network.

Manner 3: The UE uses only a cellular link, that is, the UE transmits the acknowledgement feedback to the first base station, and then the first base station transmits the acknowledgement feedback to a core network.

Manner 4: The UE uses both the third transmission manner and the first transmission manner, and the first base station uploads the acknowledgement feedback to a core network.



[0082] It should be noted that, a resource that is of the first base station and that is used when the second base station sends the data to the UE is different from a resource that is of the first base station and that is used when the UE sends the acknowledgement feedback to the second base station by using the D2D link. That is, the UE may learn, by using content in the resource configuration information of the first base station, a range or a frequency of the resource that is of the first base station and that is used by the second base station, and a range or a frequency of the resource that is of the first base station, that is used when the UE sends the acknowledgement feedback, and that is different from that used by the second base station, so as to avoid a resource conflict.

[0083] According to the resource allocation method provided in this embodiment of the present invention, a second base station sends first indication information to a first base station, so that the first base station sends resource configuration information of the first base station to the second base station after learning that the second base station supports D2D communication. After determining, by using identifier information of UE sent by the first base station, that the UE supports D2D communication with the second base station, the second base station sends the resource configuration information of the first base station to the UE according to the identifier information of the UE, so that the UE communicates with a network element device by using a resource configured by using the resource configuration information of the first base station. According to the method provided in this embodiment of the present invention, the second base station configures a resource of the first base station for the UE that performs D2D communication with the second base station, so that the resource of the first base station can be reused by the UE and the second base station, thereby improving resource utilization of a communications system.

[0084] Embodiment 7 of the present invention provides a resource allocation method. This embodiment relates to a specific process in which a first base station sends resource configuration information of the first base station to a second base station, so that the second base station allocates a resource of the first base station to UE. The method includes: sending, by the first base station, the resource configuration information of the first base station to the second base station, where the resource configuration information of the first base station is used to configure a resource for device-to-device (D2D) communication between the user equipment (UE) and the second base station.

[0085] Specifically, the first base station may periodically send the resource configuration information of the first base station to the second base station, or may send the resource configuration information of the first base station to the second base station after detecting that the second base station supports D2D communication, or may send the resource configuration information of the first base station to the second base station in another trigger manner. Therefore, the second base station may periodically receive the resource configuration information of the first base station; or may receive the resource configuration information of the first base station at a time and perform D2D communication in a preset time period by using the resource configured by using the resource configuration information of the first base station, and after the preset time period elapses, release the resource configured by using the resource configuration information of the first base station.

[0086] After receiving the resource configuration information of the first base station sent by the first base station, the second base station may forward the resource configuration information of the first base station to the UE, so that the UE can determine the resource for D2D communication with the second base station according to the resource configuration information of the first base station, or may perform data transmission or signaling interaction with a core network or another network element device in a D2D communication mode by using the resource configured by using the resource configuration information of the first base station. That is, in this embodiment of the present invention, an uplink resource or a downlink resource of the first base station can be reused by the UE that performs D2D communication with the second base station, thereby improving resource utilization of a communications system.

[0087] According to the resource allocation method provided in this embodiment of the present invention, a first base station sends resource configuration information of the first base station to a second base station, and the second base station sends the resource configuration information of the first base station to UE, so that the UE performs D2D communication with the second base station or a core network by using a resource configured by using the resource configuration information of the first base station. Therefore, an uplink resource or a downlink resource of the first base station can be reused by the UE, thereby improving resource utilization of a communications system.

[0088] FIG. 8 is a schematic flowchart of Embodiment 8 of a resource allocation method according to the present invention. This embodiment relates to a specific process in which after a first base station learns that a second base station supports D2D communication, the first base station sends resource configuration information of the first base station to the second base station. This embodiment is applied to a scenario in which an S1 connection is established between the second base station and a core network, and a D2D mode is used for communication between the second base station and UE. As shown in FIG. 8, the method includes the following steps.

[0089] S801: The first base station determines, according to an indication of the second base station, that the second base station supports D2D communication.

[0090] Specifically, the second base station detects whether the second base station has a D2D communication capability. Optionally, the second base station may detect whether a D2D module is installed on the second base station, to determine whether the second base station has a D2D communication capability. The D2D module may be a physical board, or may be a program supporting D2D communication. That is, during initial deployment of an entire network architecture, a physical board with a D2D communication capability may be deployed on the second base station, or a program supporting a D2D communication capability may be loaded into the second base station. Optionally, when detecting that the second base station supports D2D communication, the second base station may send indication information to the first base station. After receiving the indication information, the first base station learns that the second base station supports D2D communication. The indication information may be reported to the first base station by using RRC signaling, or may be reported to the first base station by using other signaling. A form of the indication information is not limited in this embodiment of the present invention provided that after receiving the indication information, the first base station learns that the second base station supports D2D communication. Optionally, the second base station may notify an OAM console that the second base station supports a D2D communication capability, or an OAM console actively detects whether the second base station supports D2D communication, so that when the OAM console learns that the second base station supports D2D communication, an operation and management personnel can perform corresponding configuration on the first base station by using the OAM console. Therefore, the first base station learns that the second base station supports D2D communication, and further sends resource configuration information of the first base station to the second base station.

[0091] S802: The first base station sends resource configuration information of the first base station to the second base station, where the resource configuration information of the first base station is used to configure a resource for device-to-device (D2D) communication between the user equipment (UE) and the second base station.

[0092] Specifically, for this step, refer to an execution process of Embodiment 7. Details are not repeatedly described herein.

[0093] S803: The first base station sends a first message to the UE, where the first message is used to notify the UE that the second base station supports D2D communication.

[0094] Specifically, after receiving the resource configuration information of the first base station, the second base station sends a reference signal to the UE, to instruct the UE to send a setup request message. Optionally, the second base station may send the reference signal by using an uplink resource of the second base station, or may send the broadcasted reference signal by using the resource configured by using the resource configuration information of the first base station. The resource configured by using the resource configuration information of the first base station includes an uplink resource of the first base station and/or a downlink resource of the first base station. Optionally, after receiving the resource configuration information of the first base station, the second base station may further send an acknowledgement to the first base station, to notify the first base station that the second base station has successfully received the resource configuration information of the first base station. Optionally, the reference signal may be carried in a broadcast message to be sent to the UE in a broadcast manner.

[0095] Further, the first base station adds, to the first message, information indicating that the second base station supports D2D communication, and broadcasts the first message. After receiving the first message, the UE learns that the second base station supports D2D communication. Then, the UE receives and measures signal received strength of the reference signal sent by the second base station, and determines whether the signal received strength of the reference signal meets a preset condition of performing D2D communication with the second base station. Optionally, the preset condition may be: received strength of a signal received by the UE meets a preset threshold, or received strength of a signal received by the UE meets a signal to interference plus noise ratio threshold for demodulating a signal by the UE, or a distance between the UE and the second base station meets a particular condition, or the like.

[0096] When the UE determines that the signal received strength of the reference signal received by the UE meets the preset condition, the UE determines that the UE supports D2D communication with the second base station. It should be noted that, the UE is actually a D2D terminal in this case.

[0097] S804: The first base station receives an RRC connection setup request message that is sent by the UE and that carries first indication information, where the first indication information is used to notify the first base station that the UE supports D2D communication with the second base station.

[0098] Specifically, when the UE determines that the UE can perform D2D communication with the second base station, the UE initiates establishment of an RRC connection to the first base station. Specifically, the UE sends a preamble to the first base station, and the first base station sends an RAR message to the UE after receiving the preamble. Then, the UE sends the RRC connection setup request message to the first base station, and adds the first indication information to the RRC connection setup request message, so that the first base station learns, by using the first indication information, that the UE meets the preset condition of performing D2D communication with the second base station.

[0099] S805: The first base station adds an identifier of the UE to the RRC connection setup request message, and sends the RRC connection setup request message to the second base station, so that the second base station sends an RRC connection setup response message to the UE according to the identifier of the UE, where the RRC connection setup response message includes the resource configuration information of the first base station.

[0100] Specifically, after learning, according to the RRC connection request message, that the UE meets the preset condition of performing D2D communication with the second base station, the first base station adds the identifier of the UE to the RRC connection setup request message, and sends the RRC connection setup request message to the second base station (the RRC connection setup request message carries the identifier of the UE and the first indication information in this case). The second base station receives the RRC connection setup request message, and learns that the UE corresponding to the identifier of the UE supports D2D communication with the second base station. Therefore, the second base station sends the RRC connection setup response message to the UE. The RRC connection setup response message includes the resource configuration information of the first base station. Optionally, the second base station may send the RRC connection setup response message to the UE by using a downlink resource of the second base station, or may send the RRC connection setup response message to the UE by using the resource configured by using the resource configuration information of the first base station. Further, when the second base station sends the RRC connection setup response message to the UE, the second base station further simultaneously establishes an S1 connection to a core network, so that the UE can perform, by using the resource configured by using the resource configuration information of the first base station, data interaction with the core network by using the second base station.

[0101] It should be noted that, no matter whether the second base station sends the RRC connection setup response message to the UE or the UE performs data interaction with the core network by using the second base station, a protocol stack shown in FIG. 4 can be used in a process in which the UE performs D2D communication with the second base station.

[0102] According to the resource allocation method provided in this embodiment of the present invention, after determining, according to an indication of a second base station, that the second base station supports D2D communication, a first base station sends resource configuration information of the first base station to the second base station, and broadcasts, to UE, a first message indicating that the second base station supports D2D communication, so that the UE establishes an RRC connection to the first base station after determining, according to measured signal received strength of a reference signal sent by the second base station, that the UE supports D2D communication with the second base station. Therefore, the first base station sends, to the second base station, an RRC connection setup request that carries an identifier of the UE and first indication information, and further, the second base station sends the resource configuration information of the first base station to the UE. According to the method provided in this embodiment of the present invention, the second base station configures a resource of the first base station for the UE that performs D2D communication with the second base station, so that the resource of the first base station can be reused by the UE and the second base station, thereby improving resource utilization of a communications system.

[0103] FIG. 9 is a schematic flowchart of Embodiment 9 of a resource allocation method according to the present invention. This embodiment relates to another specific process in which after a first base station learns that a second base station supports D2D communication, the first base station sends resource configuration information of the first base station to the second base station. This embodiment is applied to a scenario in which an S1 connection is established between the second base station and a core network, and a D2D mode is used for communication between the second base station and UE. As shown in FIG. 9, the method includes the following steps.

[0104] S901: The first base station determines, according to an indication of the second base station, that the second base station supports D2D communication.

[0105] S902: The first base station sends resource configuration information of the first base station to the second base station, where the resource configuration information of the first base station is used to configure a resource for device-to-device (D2D) communication between the user equipment (UE) and the second base station.

[0106] Specifically, for a specific execution process of S901, refer to specific content of S801 in Embodiment 8, and for a specific execution process of S902, refer to an execution process of Embodiment 7. Details are not repeatedly described herein.

[0107] S903: The first base station sends a first message to the UE, where the first message is used to notify the UE that the second base station supports D2D communication.

[0108] Specifically, after receiving the resource configuration information of the first base station, the second base station sends a reference signal to the UE, to instruct the UE to send a setup request message. Optionally, the second base station may send the reference signal by using an uplink resource of the second base station, or may send the broadcasted reference signal by using the resource configured by using the resource configuration information of the first base station. The resource configured by using the resource configuration information of the first base station includes an uplink resource of the first base station and/or a downlink resource of the first base station. Optionally, after receiving the resource configuration information of the first base station, the second base station may further send an acknowledgement to the first base station, to notify the first base station that the second base station has successfully received the resource configuration information of the first base station. Optionally, the reference signal may be carried in a broadcast message to be sent to the UE in a broadcast manner.

[0109] Further, the first base station adds, to the first message, information indicating that the second base station supports D2D communication, broadcasts the first message, and instructs, by using the first message, the UE not to actively receive the reference signal sent by the second base station. Therefore, after the UE receives the first message broadcasted by the first base station, the UE initiates a cellular connection establishment process to the first base station. For a specific establishment process, refer to the prior art. Details are not described herein.

[0110] S904: The first base station sends a measurement instruction to the UE, where the measurement instruction is used to instruct the UE to measure signal received strength of a reference signal sent by the second base station.

[0111] S905: The first base station determines, according to the received signal received strength that is of the reference signal and that is reported by the UE, that the UE supports D2D communication with the second base station.

[0112] Specifically, after receiving the measurement instruction, the UE receives and measures the signal received strength of the reference signal sent by the second base station, and sends the signal received strength of the reference signal to the first base station, so that the first base station determines, according to the signal received strength of the reference signal, whether the UE meets a preset condition of performing D2D communication with the second base station. Optionally, the preset condition may be: received strength of a signal received by the UE meets a preset threshold, or received strength of a signal received by the UE meets a signal to interference plus noise ratio threshold for demodulating a signal by the UE, or a distance between the UE and the second base station meets a particular condition, or the like.

[0113] S906: The first base station sends identifier information of the UE to the second base station, and sends, to the UE, second indication information that carries a first identifier, where the identifier information of the UE is used to notify the second base station that the UE supports D2D communication with the second base station, and the second indication information is used to instruct the UE to perform D2D communication with the second base station corresponding to the first identifier.

[0114] Specifically, when the first base station determines, according to the signal received strength that is of the reference signal and that is reported by the UE, that the UE meets the preset condition of performing D2D communication with the second base station, the first base station sends the identifier information of the UE to the second base station, so that the second base station learns, according to the identifier information of the UE, that the UE corresponding to the identifier information supports D2D communication with the second base station. In addition, the first base station further sends, to the UE, the second indication information that carries the first identifier (the first identifier is an identifier of a second base station that currently is to perform D2D communication with the UE). Therefore, the UE can learn, according to the first identifier, that the UE currently is supposed to perform D2D communication with the second base station corresponding to the first identifier (there may be multiple second base stations in an actual scenario, the first base station determines that the UE meets a preset condition of performing D2D communication with the multiple second base stations, and the first base station controls the UE to currently perform D2D communication with a specific base station or several specific base stations, and therefore, the first base station notifies the UE of the identifier of a second base station that currently is to perform D2D communication with the UE).

[0115] Then, the second base station sends the resource configuration information of the first base station to the UE according to the identifier information of the UE. Optionally, the second base station may send the resource configuration information of the first base station to the UE by using a downlink resource of the second base station, or may send the resource configuration information of the first base station to the UE by using the resource configured by using the resource configuration information of the first base station.

[0116] Optionally, the second base station may send the resource configuration information of the first base station to the UE by using the first base station.

[0117] Optionally, after receiving the second indication information that is sent by the first base station and that carries the first identifier, the UE initiates an RRC connection to the second base station corresponding to the first identifier. That is, the UE sends an RRC connection setup request message to the second base station, so that the second base station adds the resource configuration information of the first base station to an RRC connection setup response message, and sends the RRC connection setup response message to the UE.

[0118] According to the resource allocation method provided in this embodiment of the present invention, after determining, according to an indication of a second base station, that the second base station supports D2D communication, a first base station sends resource configuration information of the first base station to the second base station, and sends, to UE, a first message indicating that the second base station supports D2D communication, so that the UE reports measured signal received strength of a reference signal to the first base station after receiving a measurement instruction sent by the first base station. Therefore, after determining that the UE supports D2D communication with the second base station, the first base station sends identifier information of the UE to the second base station, and further, the second base station sends the resource configuration information of the first base station to the UE according to the identifier information of the UE. According to the method provided in this embodiment of the present invention, the second base station configures a resource of the first base station for the UE that performs D2D communication with the second base station, so that the resource of the first base station can be reused by the UE and the second base station, thereby improving resource utilization of a communications system.

[0119] FIG. 10 is a schematic flowchart of Embodiment 10 of a resource allocation method according to the present invention. This embodiment relates to another specific process in which after a first base station learns that a second base station supports D2D communication, the first base station sends resource configuration information of the first base station to the second base station. This embodiment relates to another specific process in which the second base station serves as a second serving cell of UE, and the second base station allocates an uplink resource of the first base station to the UE This embodiment is applied to an MSA scenario in which the first base station obtains data from a core network, then directly sends a part of the data to the UE, and sends the other part of the data to the UE by using the second base station, and a mode of communication between the second base station and the UE is a D2D communication mode. As shown in FIG. 10, the method includes the following steps.

[0120] S1001: The first base station determines, according to an indication of the second base station, that the second base station supports D2D communication.

[0121] S1002: The first base station sends resource configuration information of the first base station to the second base station, where the resource configuration information of the first base station is used to configure a resource for device-to-device (D2D) communication between the user equipment (UE) and the second base station.

[0122] Specifically, for a specific execution process of S1001, refer to specific content of S801 in Embodiment 8, and for a specific execution process of S1002, refer to an execution process of Embodiment 7. Details are not repeatedly described herein.

[0123] S1003: The first base station sends a first message to the UE, where the first message is used to notify the UE that the second base station supports D2D communication.

[0124] S1004: The first base station sends a measurement instruction to the UE, where the measurement instruction is used to instruct the UE to measure signal received strength of a reference signal sent by the second base station.

[0125] S1005: The first base station determines, according to the received signal received strength that is of the reference signal and that is reported by the UE, that the UE supports D2D communication with the second base station.

[0126] Specifically, for a specific execution process of S1003 to S1005, refer to specific content of S903 to S905. Details are not repeatedly described herein.

[0127] S1006: The first base station sends identifier information of the UE to the second base station, and sends, to the UE, second indication information that carries a first identifier, where the identifier information of the UE is used to notify the second base station that the UE supports D2D communication with the second base station, and is used to indicate that the second base station serves as a second serving cell of the UE, and the second indication information is used to instruct the UE to perform D2D communication with the second base station corresponding to the first identifier.

[0128] Specifically, when the first base station determines, according to the signal received strength that is of the reference signal and that is reported by the UE, that the UE meets a preset condition of performing D2D communication with the second base station, the first base station sends the identifier information of the UE to the second base station, so that the second base station learns, according to the identifier information of the UE, that the UE corresponding to the identifier information supports D2D communication with the second base station, and the second base station further learns, according to the identifier information of the UE, that the second base station serves the UE as the second serving cell of the UE (the first base station serves the UE as a first serving cell of the UE). That is, the second base station notifies the UE how to perform sorting or combination processing on received data sent by the second base station and received data sent by the first base station, or notifies the UE of information such as an order of sending data by the second base station, so that the UE can sort and combine a received part of data sent by the first base station and the other received part of data sent by the second base station, to obtain complete data.

[0129] In addition, the first base station further sends, to the UE, the second indication information that carries the first identifier (the first identifier is an identifier of a second base station that currently is to perform D2D communication with the UE). Therefore, the UE can learn, according to the first identifier, that the UE currently is supposed to perform D2D communication with the second base station corresponding to the first identifier (there may be multiple second base stations in an actual scenario, the first base station determines that the UE meets a preset condition of performing D2D communication with the multiple second base stations, and the first base station controls the UE to currently perform D2D communication with a specific base station or several specific base stations, and therefore, the first base station notifies the UE of the identifier of the second base station that currently is to perform D2D communication with the UE).

[0130] Then, the second base station sends the resource configuration information of the first base station to the UE according to the identifier information of the UE. Optionally, the second base station may send the resource configuration information of the first base station to the UE by using a downlink resource of the second base station, or may send the resource configuration information of the first base station to the UE by using the resource configured by using the resource configuration information of the first base station.

[0131] Optionally, the second base station may send the resource configuration information of the first base station to the UE by using the first base station.

[0132] Optionally, after receiving the second indication information that is sent by the first base station and that carries the first identifier, the UE initiates an RRC connection to the second base station corresponding to the first identifier. That is, the UE sends an RRC connection setup request message to the second base station, so that the second base station adds the resource configuration information of the first base station to an RRC connection setup response message, and sends the RRC connection setup response message to the UE.

[0133] Therefore, when receiving data sent by the first base station, the second base station sends the data to the UE by using a resource of the first base station, so that the UE can communicate with another network element device by using the resource of the first base station.

[0134] It should be noted that, because the second base station already serves the UE as the second serving cell of the UE, after receiving the data that is sent by the second base station by using the resource of the first base station, the UE may learn, by using the second base station, how to perform sorting or combination processing on the received data sent by the second base station and the received data sent by the first base station, so as to obtain complete data.

[0135] According to the resource allocation method provided in this embodiment of the present invention, after determining, according to an indication of a second base station, that the second base station supports D2D communication, a first base station sends resource configuration information of the first base station to the second base station, and sends, to UE, a first message indicating that the second base station supports D2D communication, so that the UE reports measured signal received strength of a reference signal to the first base station after receiving a measurement instruction sent by the first base station. Therefore, after determining that the UE supports D2D communication with the second base station, the first base station sends identifier information of the UE to the second base station, and further, the second base station sends the resource configuration information of the first base station to the UE according to the identifier information of the UE. According to the method provided in this embodiment of the present invention, the second base station configures a resource of the first base station for the UE that performs D2D communication with the second base station, so that the resource of the first base station can be reused by the UE and the second base station, thereby improving resource utilization of a communications system.

[0136] FIG. 11 is a schematic flowchart of Embodiment 11 of a resource allocation method according to the present invention. This embodiment relates to a specific process in which UE receives resource configuration information of a first base station sent by a second base station, and determines a resource for D2D communication according to the resource configuration information of the first base station. As shown in FIG. 11, the method includes the following steps.

[0137] S1101: The UE receives resource configuration information of the first base station sent by the second base station.

[0138] Specifically, the first base station sends the resource configuration information to the second base station, so that the second base station forwards the resource configuration information of the first base station to the UE. Optionally, after learning that the second base station supports D2D communication, the first base station may send the resource configuration information of the first base station to the second base station. For a manner in which the first base station learns that the second base station supports D2D communication, refer to content of the foregoing embodiment. Details are not repeatedly described herein.

[0139] Optionally, the second base station may send the resource configuration information of the first base station to the UE by using a downlink resource of the second base station, or may send the resource configuration information of the first base station to the UE by using a resource configured by using the resource configuration information of the first base station. It should be noted that, the UE is UE that is determined by the second base station and that meets a preset condition of performing D2D communication with the second base station, and a communication mode used during interaction between the UE and the second base station is a D2D communication mode. Optionally, the preset condition, met by the UE, of performing D2D communication with the second base station may be: received strength of a signal received by the UE meets a preset threshold, or received strength of a signal received by the UE meets a signal to interference plus noise ratio threshold for demodulating a signal by the UE, or a distance between the UE and the second base station meets a particular condition, or the like. S1102: The UE determines, according to the resource configuration information of the first base station, a communications resource required for D2D communication.

[0140] After receiving the resource configuration information of the first base station, the UE may perform corresponding processing on the resource configuration information of the first base station, to obtain a communications resource required when the UE performs D2D communication with a network element device. The communications resource may be an uplink resource of the first base station, or may be a downlink resource of the first base station. The communications resource may be all resources or a part of resources configured by using the resource configuration information. Optionally, the resource configuration information of the first base station may further include a physical resource block parameter. The UE may learn of, according to the physical resource block parameter, a data or signaling format used when the UE performs D2D communication with a core network or another network element device, so as to perform data transmission or signaling interaction with the core network or the another network element device in a D2D communication mode by using the resource configured by using the resource configuration information of the first base station. That is, in this embodiment of the present invention, the uplink resource or the downlink resource of the first base station can be reused by the UE that performs D2D communication with the second base station, thereby improving resource utilization of a communications system.

[0141] According to the resource allocation method provided in this embodiment of the present invention, UE that can support D2D communication with a second base station receives resource configuration information of a first base station sent by the second base station, obtains, according to the resource configuration information of the first base station, a communications resource required for D2D communication, and performs D2D communication by using the communications resource. According to the method provided in this embodiment of the present invention, the second base station configures a resource of the first base station for the UE that performs D2D communication with the second base station, so that the resource of the first base station can be reused by the UE, thereby improving resource utilization of a communications system.

[0142] FIG. 12 is a schematic flowchart of Embodiment 12 of a resource allocation method according to the present invention. This embodiment relates to a specific process in which UE obtains resource configuration information of a first base station. This embodiment is applied to a scenario in which an S1 connection is established between a second base station and a core network, and a D2D mode is used for communication between the second base station and the UE. Based on the foregoing embodiment shown in FIG. 11, the resource configuration information is an RRC connection setup response message. As shown in FIG. 12, the method specifically includes the following steps.

[0143] S1201: The UE receives a reference signal sent by the second base station, where the reference signal is used to instruct the UE to send a setup request message.

[0144] Specifically, after receiving resource configuration information of the first base station, the second base station sends the reference signal to the UE, to instruct the UE to send the setup request message. Optionally, the second base station may send the reference signal by using an uplink resource of the second base station, or may send the reference signal by using a resource configured by using the resource configuration information of the first base station. The resource configured by using the resource configuration information of the first base station includes an uplink resource of the first base station and/or a downlink resource of the first base station. Optionally, after receiving the resource configuration information of the first base station, the second base station may further send an acknowledgement to the first base station, to notify the first base station that the second base station has successfully received the resource configuration information of the first base station. Optionally, the reference signal may be carried in a broadcast message to be sent to the UE in a broadcast manner.

[0145] For a specific process in which the UE sends the setup request message, refer to specific content of S1202 to S1204.

[0146] S1202: The UE receives a first message sent by the first base station, where the first message is used to notify the UE that the second base station supports D2D communication.

[0147] S1203: The UE measures signal received strength of the reference signal, and determines, according to the signal received strength of the reference signal, that the UE supports D2D communication with the second base station.

[0148] Specifically, the first base station adds, to the first message, information indicating that the second base station supports D2D communication, and broadcasts the first message. After receiving the first message, the UE learns that the second base station supports D2D communication. Then, the UE receives and measures the signal received strength of the reference signal sent by the second base station, and determines whether the signal received strength of the reference signal meets a preset condition of performing D2D communication with the second base station. Optionally, the preset condition may be: received strength of a signal received by the UE meets a preset threshold, or received strength of a signal received by the UE meets a signal to interference plus noise ratio threshold for demodulating a signal by the UE, or a distance between the UE and the second base station meets a particular condition, or the like. S1204: The UE sends the setup request message, where the setup request message is used to request the second base station to send resource configuration information of the first base station to the UE, the setup request message is an RRC connection setup request message, and the setup request message is directly sent by the UE to the second base station.

[0149] Specifically, when the UE determines that the signal received strength of the reference signal meets the preset condition, the UE determines that the UE supports D2D communication with the second base station. Therefore, when the UE needs to perform service interaction with the second base station, the UE sends the setup request message to the second base station. The setup request message is used to request the second base station to send the resource configuration information of the first base station to the UE. In this embodiment, the setup request message may be an RRC connection setup request message. It should be noted that, the UE is actually a D2D terminal in this case.

[0150] S1205: The UE receives a setup response message sent by the second base station, where the setup response message includes the resource configuration information of the first base station, and the setup response message is an RRC connection setup response message.

[0151] Specifically, that the UE sends the RRC connection setup request message to the second base station actually means that the UE initiates an RRC connection to the second base station. Specifically, the UE sends a preamble to the second base station, and the second base station sends an RAR message to the UE after receiving the preamble. Then, the UE sends the RRC connection setup request message to the second base station, and the second base station determines, according to the RRC connection setup request message, that the UE supports D2D communication with the second base station. Therefore, the second base station sends the setup response message to the UE. The setup response message is an RRC connection setup response message, and the RRC connection setup response message includes the resource configuration information of the first base station. Optionally, the second base station may establish an RRC connection to the UE by using a downlink resource of the second base station, or may establish an RRC connection to the UE by using the resource configured by using the resource configuration information of the first base station. The RRC connection setup response message may be sent by the second base station to the UE by using the resource configured by using the resource configuration information of the first base station.

[0152] Further, when the second base station establishes an RRC connection to the UE, the second base station further establishes an S1 connection to a core network, so that the UE performs, by using the resource configured by using the resource configuration information of the first base station, data interaction with the core network by using the second base station.

[0153] It should be noted that, no matter whether the UE establishes an RRC connection to the second base station or the UE performs data interaction with the core network by using the second base station, a protocol stack shown in FIG. 4 can be used in a process in which the UE performs D2D communication with the second base station.

[0154] According to the resource allocation method provided in this embodiment of the present invention, after determining, according to a reference signal sent by a second base station, that UE meets a preset condition of performing D2D communication with the second base station, the UE establishes an RRC connection to the second base station. In a process of establishing the RRC connection, the UE receives an RRC connection setup response message that is sent by the second base station and that carries resource configuration information of a first base station, and determines, according to the resource configuration information of the first base station, a communications resource required for communication, so as to perform D2D communication by using the communications resource. According to the method provided in this embodiment of the present invention, the second base station configures a resource of the first base station for the UE that performs D2D communication with the second base station, so that the resource of the first base station can be reused by the UE and the second base station, thereby improving resource utilization of a communications system.

[0155] FIG. 13 is a schematic flowchart of Embodiment 13 of a resource allocation method according to the present invention. This embodiment relates to another specific process in which UE obtains resource configuration information of a first base station. This embodiment is applied to a scenario in which an S1 connection is established between a second base station and a core network, and a D2D mode is used for communication between the second base station and the UE. As shown in FIG. 13, the method specifically includes the following steps.

[0156] S1301: The UE receives a reference signal sent by the second base station, where the reference signal is used to instruct the UE to send a setup request message.

[0157] S1302: The UE receives a first message sent by the first base station, where the first message is used to notify the UE that the second base station supports D2D communication.

[0158] S1303: The UE measures signal received strength of the reference signal, and determines, according to the signal received strength of the reference signal, that the UE supports D2D communication with the second base station.

[0159] Specifically, for S1301 to S1303, refer to descriptions of S1201 to S1203. Details are not repeatedly described herein.

[0160] S1304: The UE sends the setup request message, where the setup request message is sent by the UE to the second base station by using the first base station, the setup request message is used to request the second base station to send resource configuration information of the first base station to the UE, the setup request message includes an identifier of the UE and first indication information, the first indication information is used to notify the second base station that the UE supports D2D communication with the second base station, and the setup request message is an RRC connection setup request message.

[0161] Specifically, a difference between this embodiment and Embodiment 12 lies in that when the UE determines that the UE can perform D2D communication with the second base station, the UE sends the setup request message to the first base station in this case, and then the first base station sends the setup request message to the second base station. In this embodiment, the setup request message is an RRC connection setup request message. That is, in this embodiment, the UE initiates an RRC connection setup request to the first base station. Specifically, the UE sends a preamble to the first base station, and the first base station sends an RAR message to the UE after receiving the preamble. Then, the UE sends the RRC connection setup request message to the first base station, and adds the identifier of the UE and the first indication information to the RRC connection setup request message, so that the first base station learns that the UE meets a preset condition of performing D2D communication with the second base station. Therefore, the first base station sends the received RRC connection setup request message to the second base station, so that the second base station learns, according to the first indication information and the identifier of the UE, that the UE supports D2D communication with the second base station. S1305: The UE receives a setup response message sent by the second base station according to the identifier of the UE, where the setup response message includes the resource configuration information of the first base station, and the setup response message is an RRC connection setup response message.

[0162] Specifically, after receiving the RRC connection setup request message that is sent by the first base station and that carries the identifier of the UE and the first indication information, the second base station adds the obtained resource configuration information of the first base station to the RRC connection setup response message, and sends the RRC connection setup response message to the UE. Optionally, the second base station may send the RRC connection setup response message to the UE by using a downlink resource of the second base station, or may send the RRC connection setup response message to the UE by using a resource of the first base station. The UE receives the RRC connection setup response message that is sent by the second base station and that carries the resource configuration information of the first base station, to obtain a communications resource required for D2D communication.

[0163] Further, when the second base station sends the RRC connection setup response message to the UE, the second base station further establishes an S1 connection to a core network, so that the UE can perform, by using a communications resource in the resource of the first base station, data interaction with the core network by using the second base station.

[0164] It should be noted that, no matter whether the second base station sends the RRC connection setup response message to the UE or the UE performs data interaction with the core network by using the second base station, a protocol stack shown in FIG. 4 can be used in a process in which the UE performs D2D communication with the second base station.

[0165] According to the resource allocation method provided in this embodiment of the present invention, after determining, according to a reference signal sent by a second base station, that UE meets a preset condition of performing D2D communication with the second base station, the UE establishes an RRC connection to a first base station, so that the first base station sends, to the second base station, an RRC connection setup request message that carries an identifier of the UE and first indication information. Therefore, the UE receives an RRC connection setup response message that is sent by the second base station and that carries resource configuration information of the first base station, and obtains, according to the RRC connection setup response message, a communications resource required for D2D communication. According to the method provided in this embodiment of the present invention, the second base station configures a resource of the first base station for the UE that performs D2D communication with the second base station, so that the resource of the first base station can be reused by the UE and the second base station, thereby improving resource utilization of a communications system. FIG. 14 is a schematic flowchart of Embodiment 14 of a resource allocation method according to the present invention. This embodiment relates to another specific process in which UE obtains resource configuration information of a first base station. This embodiment is applied to a scenario in which an S1 connection is established between a second base station and a core network, and a D2D mode is used for communication between the second base station and the UE. As shown in FIG. 14, the method specifically includes the following steps.

[0166] S1401: The UE measures, according to a measurement instruction sent by the first base station, signal received strength of a reference signal sent by the second base station.

[0167] Specifically, after receiving resource configuration information of the first base station, the second base station may send the reference signal. Optionally, the reference signal may be carried in a broadcast message to be sent in a broadcast manner. Optionally, the second base station may broadcast the reference signal by using an uplink resource of the second base station, or may send the reference signal by using a resource configured by using the resource configuration information of the first base station. Optionally, after receiving the resource configuration information of the first base station, the second base station may further send an acknowledgement to the first base station, to notify the first base station that the second base station has successfully received the resource configuration information of the first base station.

[0168] Further, the first base station adds, to a first message, information indicating that the second base station supports D2D communication, broadcasts the first message, and instructs, by using the first message, the UE not to actively receive the reference signal sent by the second base station. Therefore, after the UE receives the first message broadcasted by the first base station, the UE initiates a cellular connection establishment process to the first base station. For a specific establishment process, refer to the prior art. Details are not described herein. Then, the first base station sends the measurement instruction to the UE, to instruct the UE to measure the signal received strength of the reference signal sent by the second base station.

[0169] S1402: The UE reports the signal received strength of the reference signal to the first base station, so that the first base station sends identifier information of the UE to the second base station after determining, according to the signal received strength of the reference signal, that the UE supports D2D communication with the second base station, where the identifier information of the UE is used to notify the second base station that the UE supports D2D communication with the second base station.

[0170] Specifically, after measuring the signal received strength of the reference signal sent by the second base station, the UE sends the signal received strength of the reference signal to the first base station, so that the first base station determines, according to the signal received strength of the reference signal, whether the UE meets a preset condition of performing D2D communication with the second base station. Optionally, the preset condition may be: received strength of a signal received by the UE meets a preset threshold, or received strength of a signal received by the UE meets a signal to interference plus noise ratio threshold for demodulating a signal by the UE, or a distance between the UE and the second base station meets a particular condition, or the like.

[0171] When the first base station determines, according to the signal received strength of the reference signal, that the UE meets the preset condition of performing D2D communication with the second base station, the first base station sends the identifier information of the UE to the second base station, so that the second base station determines, according to the identifier information of the UE, that the UE supports D2D communication with the second base station.

[0172] S1403: The UE receives second indication information that is sent by the first base station and that carries a first identifier, where the second indication information is used to instruct the UE to perform D2D communication with the second base station corresponding to the first identifier.

[0173] Specifically, when the first base station determines, according to the signal received strength of the reference signal, that the UE meets the preset condition of performing D2D communication with the second base station, the first base station further adds the first identifier to the second indication information, and sends the second indication information to the UE, so that the UE learns that the UE currently is supposed to perform D2D communication with the second base station corresponding to the first identifier (there may be multiple second base stations in an actual scenario, the first base station determines that the UE meets a preset condition of performing D2D communication with the multiple second base stations, and the first base station controls the UE to currently perform D2D communication with a specific base station or several specific base stations, and therefore, the first base station notifies the UE of an identifier of a second base station that currently is to perform D2D communication with the UE).

[0174] S1404: The UE receives resource configuration information of the first base station sent by the second base station corresponding to the first identifier.

[0175] Specifically, the first base station instructs, by using the second indication information, the UE to perform D2D communication with the second base station corresponding to the first identifier. In this case, the second base station corresponding to the first identifier may send the resource configuration information of the first base station to the UE by using a downlink resource of the second base station, or may send the resource configuration information of the first base station to the UE by using a resource of the first base station.

[0176] Optionally, the UE may further receive the resource configuration information of the first base station sent by using the first base station by the second base station corresponding to the first identifier.

[0177] Optionally, after receiving the second indication information sent by the first base station, the UE initiates an RRC connection to the second base station corresponding to the first identifier carried in the second indication information. That is, the UE sends an RRC connection setup request message to the second base station corresponding to the first identifier. Because the second base station has learned, according to the identifier information of the UE, that the UE supports D2D communication with the second base station, the second base station receives the RRC connection setup request message sent by the UE, adds the resource configuration information of the first base station to an RRC connection setup response message, and sends the RRC connection setup response message to the UE.

[0178] According to the resource allocation method provided in this embodiment of the present invention, a first base station sends a measurement instruction to UE, and the UE sends, to the first base station, signal received strength that is of a reference signal sent by a second base station and that is measured according to the measurement instruction, so that the first base station determines whether the UE meets a preset condition of performing D2D communication with the second base station, and sends identifier information of the UE to the second base station after determining that the UE meets the preset condition. Therefore, the second base station sends resource configuration information of the first base station to the UE according to the identifier information of the UE, and the UE communicates with a network element device by using a resource configured by using the resource configuration information of the first base station. According to the method provided in this embodiment of the present invention, the second base station configures a resource of the first base station for the UE that performs D2D communication with the second base station, so that the resource of the first base station can be reused by the UE and the second base station, thereby improving resource utilization of a communications system.

[0179] FIG. 15 is a schematic flowchart of Embodiment 15 of a resource allocation method according to the present invention. This embodiment relates to another specific process in which UE obtains resource configuration information of a first base station. This embodiment is applied to an MSA scenario in which the first base station obtains data from a core network, then directly sends a part of the data to the UE, and sends the other part of the data to the UE by using a second base station, and a mode of communication between the second base station and the UE is a D2D communication mode. As shown in FIG. 15, the method includes the following steps.

[0180] S1501: The UE measures, according to a measurement instruction sent by the first base station, signal received strength of a reference signal sent by the second base station.

[0181] Specifically, for a specific execution process of S1501, refer to specific content of S1401. Details are not repeatedly described herein.

[0182] S1502: The UE reports the signal received strength of the reference signal to the first base station, so that the first base station sends identifier information of the UE to the second base station after determining, according to the signal received strength of the reference signal, that the UE supports D2D communication with the second base station, where the identifier information of the UE is used to notify the second base station that the UE supports D2D communication with the second base station, and is used to indicate that the second base station serves as a second serving cell of the UE.

[0183] Specifically, after measuring the signal received strength of the reference signal sent by the second base station, the UE sends the signal received strength of the reference signal to the first base station, so that the first base station determines, according to the signal received strength of the reference signal, whether the UE meets a preset condition of performing D2D communication with the second base station. Optionally, the preset condition may be: received strength of a signal received by the UE meets a preset threshold, or received strength of a signal received by the UE meets a signal to interference plus noise ratio threshold for demodulating a signal by the UE, or a distance between the UE and the second base station meets a particular condition, or the like.

[0184] When the first base station determines, according to the signal received strength of the reference signal, that the UE meets the preset condition of performing D2D communication with the second base station, the first base station sends the carried identifier information of the UE to the second base station, so that the second base station determines, according to the identifier information of the UE, that the UE can perform D2D communication with the second base station, and the second base station further learns, according to the identifier information of the UE, that the second base station serves the UE as the second serving cell of the UE in this case (the first base station serves the UE as a first serving cell of the UE). That is, the second base station notifies the UE how to perform sorting or combination processing on received data sent by the second base station and received data sent by the first base station, or notifies the UE of information such as an order of sending data by the second base station, so that the UE can sort and combine a received part of data sent by the first base station and the other received part of data sent by the second base station, so as to obtain complete data.

[0185] S1503: The UE receives second indication information that is sent by the first base station and that carries a first identifier, where the second indication information is used to instruct the UE to perform D2D communication with the second base station corresponding to the first identifier. Specifically, for a specific process of S1503, refer to specific content of S1403. Details are not repeatedly described herein.

[0186] S1504: The UE receives resource configuration information of the first base station sent by the second base station corresponding to the first identifier.

[0187] Specifically, the first base station instructs, by using the second indication information, the UE to perform D2D communication with the second base station corresponding to the first identifier. In this case, the second base station corresponding to the first identifier may send the resource configuration information of the first base station to the UE by using a downlink resource of the second base station, or may send the resource configuration information of the first base station to the UE by using an uplink resource of the first base station.

[0188] Optionally, the UE may further receive the resource configuration information of the first base station sent by using the first base station by the second base station corresponding to the first identifier. Optionally, after receiving the second indication information sent by the first base station, the UE initiates an RRC connection to the second base station corresponding to the first identifier carried in the second indication information. That is, the UE sends an RRC connection setup request message to the second base station corresponding to the first identifier. Because the second base station has learned, according to the identifier information of the UE, that the UE supports D2D communication with the second base station, the second base station receives the RRC connection setup request message sent by the UE, adds the resource configuration information of the first base station to an RRC connection setup response message, and sends the RRC connection setup response message to the UE.

[0189] Further, when the second base station starts to perform D2D communication with the UE, the second base station may send a received part of data of the first base station to the UE by using a resource configured by using the resource configuration information of the first base station (the other part of data is sent by the first base station to the UE). Because the second already serves the UE as the second serving cell of the UE, after receiving the data sent by the second base station by using a resource of the first base station, the UE may learn, by using the second base station, how to perform sorting or combination processing on the received data sent by the second base station and the received data sent by the first base station, so as to obtain complete data.

[0190] Optionally, when receiving the data sent by the second base station, the UE sends an acknowledgement feedback to the second base station. The acknowledgement feedback may be sent in the following several manners:

Manner 1: No matter whether there is a physical connection between the second base station and a core network, the UE uses only a D2D link between the UE and the second base station to send the acknowledgement feedback to the second base station; the second base station transmits the acknowledgement feedback to the first base station, and then the first base station sends the acknowledgement feedback to the core network.

Manner 2: When there is a physical connection between the second base station and a core network, the UE uses only a D2D link to transmit the acknowledgement feedback to the second base station, and then the second base station transmits the acknowledgement feedback to the core network.

Manner 3: The UE uses only a cellular link, that is, the UE transmits the acknowledgement feedback to the first base station, and then the first base station transmits the acknowledgement feedback to a core network.

Manner 4: The UE uses both the third transmission manner and the first transmission manner, and the first base station uploads the acknowledgement feedback to a core network.



[0191] According to the resource allocation method provided in this embodiment of the present invention, a first base station sends a measurement instruction to UE, and the UE sends, to the first base station, signal received strength that is of a reference signal sent by a second base station and that is measured according to the measurement instruction, so that the first base station determines whether the UE meets a preset condition of performing D2D communication with the second base station, and sends identifier information of the UE to the second base station after determining that the UE meets the preset condition. Therefore, the second base station sends resource configuration information of the first base station to the UE according to the identifier information of the UE. According to the method provided in this embodiment of the present invention, the second base station configures a resource of the first base station for the UE that performs D2D communication with the second base station, so that the resource of the first base station can be reused by the UE and the second base station, thereby improving resource utilization of a communications system.

[0192] FIG. 16 is a signaling flowchart of Embodiment 16 of a resource allocation method according to the present invention. This embodiment is applied to a scenario in which there is an S1 physical link between a second base station and a core network, and a D2D mode is used for communication between the second base station and UE. As shown in FIG. 16, the method includes the following steps.

[0193] S1601: The second base station notifies a first base station that the second base station supports D2D communication.

[0194] S1602: The first base station sends resource configuration information of the first base station to the second base station.

[0195] S1603: The second base station sends a reference signal.

[0196] S1604: The first base station sends a first message, where the first message is used to notify the UE that the second base station supports D2D communication.

[0197] Specifically, the first message includes at least frequency domain information and/or time domain information of the reference signal sent by the second base station for D2D communication. The first message may be sent in a broadcast manner.

[0198] S1605: The UE measures signal received strength of the received reference signal, and determines, according to the signal received strength of the reference signal, that the UE meets a preset condition of performing D2D communication with the second base station.

[0199] S1606: The UE sends an RRC connection setup request message to the second base station. S1607: The second base station sends, to the UE, an RRC connection setup response message that carries the resource configuration information of the first base station.

[0200] S1608: The UE obtains, according to the RRC connection setup response message, a communications resource required for D2D communication.

[0201] It should be noted that, the second base station may establish an S1 link from the second base station to a core network for the UE that performs D2D communication, to facilitate data interaction between the UE and the core network.

[0202] For S1601 to S1608, refer to an execution process of the foregoing embodiment. Details are not repeatedly described herein.

[0203] FIG. 17 is a signaling flowchart of Embodiment 17 of a resource allocation method according to the present invention. This embodiment is applied to a scenario in which there is an S1 physical link between a second base station and a core network, and a D2D mode is used for communication between the second base station and UE. As shown in FIG. 17, the method includes the following steps.

[0204] S1701: The second base station notifies a first base station that the second base station supports D2D communication.

[0205] S1702: The first base station sends resource configuration information of the first base station to the second base station.

[0206] S1703: The second base station sends a reference signal.

[0207] S1704: The first base station sends a first message, where the first message is used to notify the UE that the second base station supports D2D communication.

[0208] Specifically, the first message includes at least frequency domain information and/or time domain information of the reference signal sent by the second base station for D2D communication. The first message may be sent in a broadcast manner.

[0209] S1705: The UE measures signal received strength of the received reference signal, and determines, according to the signal received strength of the reference signal, that the UE meets a preset condition of performing D2D communication with the second base station.

[0210] S1706: The UE sends an RRC connection setup request message to the first base station, where the RRC connection setup request message carries an identifier of the UE and first indication information, and the first indication information is used to notify the second base station that the UE meets the preset condition of performing D2D communication with the second base station. S1707: The first base station sends the RRC connection setup request message to the second base station.

[0211] S1708: The second base station sends, to the UE, an RRC connection setup response message that carries the resource configuration information of the first base station.

[0212] S1709: The UE obtains, according to the RRC connection setup response message, a communications resource required for D2D communication.

[0213] It should be noted that, the second base station may establish an S1 link from the second base station to a core network for the UE that performs D2D communication, to facilitate data interaction between the UE and the core network.

[0214] For S1701 to S1709, refer to an execution process of the foregoing embodiment. Details are not repeatedly described herein.

[0215] FIG. 18A and FIG. 18B are a signaling flowchart of Embodiment 18 of a resource allocation method according to the present invention. This embodiment is applied to a scenario in which there is an S1 physical link between a second base station and a core network, and a D2D mode is used for communication between the second base station and UE. As shown in FIG. 18A and FIG. 18B, the method includes the following steps.

[0216] S1801: The second base station notifies a first base station that the second base station supports D2D communication.

[0217] S1802: The first base station sends resource configuration information of the first base station to the second base station.

[0218] S1803: The second base station sends a reference signal.

[0219] S1804: The first base station sends a first message, where the first message is used to notify the UE that the second base station supports D2D communication, and instruct the UE not to actively receive the reference signal broadcasted by the second base station.

[0220] S1805: The UE establishes an RRC connection to the first base station.

[0221] S1806: The first base station sends a measurement instruction to the UE, where the measurement instruction is used to instruct the UE to measure signal received strength of the reference signal sent by the second base station.

[0222] S1807: The UE receives and measures the signal received strength of the reference signal according to the measurement instruction, and sends the signal received strength of the reference signal to the first base station.

[0223] S1808: The first base station determines, according to the received signal received strength that is of the reference signal and that is reported by the UE, that the UE meets a preset condition of performing D2D communication with the second base station.

[0224] S1809: The first base station sends identifier information of the UE to the second base station, where the identifier information of the UE is used to notify the second base station that the UE meets the preset condition of performing D2D communication with the second base station.

[0225] It should be noted that, content of the identifier information of the UE may be requesting the second base station to provide a communications service for the UE. Optionally, if the UE has reported, to the first base station, a service type of a service requested by the UE, the first base station transmits the service type to the second base station, so that the second base station can provide a corresponding service for the UE according to the service type.

[0226] S1810: The first base station sends, to the UE, second indication information that carries a first identifier, where the second indication information is used to instruct the UE to perform D2D communication with the second base station corresponding to the first identifier.

[0227] S1811: The second base station sends the resource configuration information of the first base station to the UE.

[0228] S1812: The UE obtains, according to the resource configuration information of the first base station, a communications resource required for D2D communication.

[0229] For S1801 to S1812, refer to an execution process of the foregoing embodiment. Details are not repeatedly described herein.

[0230] FIG. 19 is a signaling flowchart of Embodiment 19 of a resource allocation method according to the present invention. This embodiment is applied to an MSA scenario in which a first base station obtains data from a core network, then directly sends a part of the data to UE, and sends the other part of the data to the UE by using a second base station, and a mode of communication between the second base station and the UE is a D2D communication mode. As shown in FIG. 19, the method includes the following steps.

[0231] S1901: The second base station notifies the first base station that the second base station supports D2D communication.

[0232] S1902: The first base station sends resource configuration information of the first base station to the second base station.

[0233] S1903: The second base station sends a reference signal.

[0234] S1904: The first base station sends a first message, where the first message is used to notify the UE that the second base station supports D2D communication, and instruct the UE not to actively receive the reference signal broadcasted by the second base station.

[0235] S1905: The UE establishes an RRC connection to the first base station.

[0236] S1906: The first base station sends a measurement instruction to the UE, where the measurement instruction is used to instruct the UE to measure signal received strength of the reference signal broadcasted by the second base station.

[0237] S1907: The UE receives and measures the signal received strength of the reference signal according to the measurement instruction, and sends the signal received strength of the reference signal to the first base station.

[0238] S1908: The first base station determines, according to the received signal received strength that is of the reference signal and that is reported by the UE, that the UE meets a preset condition of performing D2D communication with the second base station.

[0239] S1909: The first base station sends identifier information of the UE to the second base station, where the identifier information of the UE is used to notify the second base station that the UE meets the preset condition of performing D2D communication with the second base station, and is further used to indicate that the second base station serves as a second serving cell of the UE. S1910: The first base station sends, to the UE, second indication information that carries a first identifier, where the second indication information is used to instruct the UE to perform D2D communication with the second base station corresponding to the first identifier.

[0240] S1911: The second base station sends the resource configuration information of the first base station to the UE.

[0241] S1912: The UE obtains, according to the resource configuration information of the first base station, a communications resource required for D2D communication.

[0242] S1913: The first base station sends data obtained from a core network to the second base station. S1914: The second base station sends the data to the UE in a D2D communication mode, so that the UE can receive the data by using the determined communications resource.

[0243] For S1901 to S1914, refer to an execution process of the foregoing embodiment. Details are not repeatedly described herein.

[0244] In a heterogeneous network, a resource used for communication between a micro base station and a macro base station or UE is an uplink-downlink resource of the macro base station. However, when receiving, by using a downlink resource of the macro base station, data delivered by the macro base station, the micro base station cannot send data to the UE by using the downlink resource; or when receiving data sent by UE in coverage of the micro base station, the micro base station cannot send data to the macro base station by using an uplink resource. Therefore, the micro base station cannot simultaneously communicate with the macro base station and the UE, and a resource can be used only at different time. Consequently, resource utilization is not high. How to improve resource utilization of the micro base station is a technical problem to be resolved in the following embodiment.

[0245] FIG. 20 is a schematic flowchart of Embodiment 20 of a resource allocation method according to the present invention. This embodiment relates to a specific process in which a mode of communication between a second base station and a first base station is configured as a D2D communication mode, so that the second base station simultaneously communicates with UE and the first base station by using a resource of the first base station. In this embodiment, the first base station is a macro base station, and the second base station is a micro base station. As shown in FIG. 20, the method includes the following steps.

[0246] S2001: The second base station receives resource configuration information of the first base station, where the resource configuration information of the first base station is used to configure a resource for device-to-device (D2D) communication between the UE and the second base station, and is used to set a mode of communication between the second base station and the first base station to a D2D communication mode.

[0247] Specifically, in this embodiment, both the second base station and the first base station support D2D communication by default, or both the second base station and the first base station may perform a corresponding D2D detection to learn whether both the second base station and the first base station support D2D communication. If both the second base station and the first base station support D2D communication, the first base station sends the resource configuration information of the first base station to the second base station. Optionally, the first base station and the second base station detect whether the first base station and the second base station have a D2D communication capability. For details, refer to the foregoing method embodiment. Details are not repeatedly described herein.

[0248] When the first base station detects that the first base station supports D2D communication, and learns that the second base station also supports D2D communication, the first base station sends the resource configuration information of the first base station to the second base station. Further, the first base station may set the mode of communication between the first base station and the second base station to a D2D communication mode by using a communication parameter in the resource configuration information of the first base station, or may set a mode of communication between the second base station and the UE as a cellular communication mode, and notify the second base station that the second base station may perform communication by using a resource of the first base station.

[0249] S2002: The second base station performs D2D communication with the first base station by using the resource configured by using the resource configuration information of the first base station.

[0250] Specifically, in this embodiment, the resource configured by using the resource configuration information of the first base station may be an uplink resource of the first base station, or may be a downlink resource of the first base station. Because the D2D communication mode has a capability of avoiding a resource conflict, when receiving, by using the downlink resource of the first base station, data sent by the first base station, the second base station may send data to the UE by using the uplink resource of the first base station, or when receiving, by using the uplink resource of the first base station, data sent by UE, the second base station may send data to the macro base station by using the downlink resource of the first base station. According to the technical solution in this embodiment of the present invention, the micro base station may simultaneously receive data and send data, thereby improving resource utilization of the first base station.

[0251] It should be noted that, the first base station and the second base station may perform D2D communication by using a protocol stack shown in FIG. 21, a protocol stack shown in FIG. 22, or a protocol stack shown in FIG. 23. A difference between the protocol stack shown in FIG. 21 and the protocol stack shown in FIG. 22 lies in that if the second base station uses the protocol stack shown in FIG. 21 to perform D2D communication with the first base station, the second base station may use a D2D link alone to implement a backhaul link, and if the second base station uses the protocol stack shown in FIG. 22, the second base station may support both a cellular link and a D2D link. For the protocol stack shown in FIG. 23, the second base station may serve as a routing function node in this case, to forward data between the UE and the macro base station at an IP layer. In addition, a link between the second base station and the macro base station is a D2D link, and a link between the second base station and the UE is a normal cellular link.

[0252] In addition, in the protocol stacks in FIG. 4, and FIG. 21 to FIG. 23, S1-AP refers to an S1-application protocol layer, SCTP refers to a stream control transmission protocol layer, IP is an Internet protocol layer, RRC is a radio resource control layer, PDCP is a packet data convergence protocol, RLC is a radio link control layer, MAC is a media access control layer, PHY is a physical layer, D2D PHY refers to PHY in a D2D communication mode, and NAS is a non-access stratum layer.

[0253] According to the resource allocation method provided in this embodiment of the present invention, a first base station and a second base station are separately deployed as a base station that supports D2D communication, and the first base station configures a mode of communication with the second base station to a D2D communication mode, so that the second base station can perform D2D communication with the first base station by using an uplink resource of the first base station when receiving data, that is, the second base station can simultaneously receive data and send data, thereby improving resource utilization of the first base station.

[0254] Persons of ordinary skill in the art may understand that all or some of the steps of the method embodiments may be implemented by a program instructing relevant hardware. The program may be stored in a computer readable storage medium. When the program runs, the steps of the method embodiments are performed. The storage medium includes: any medium that can store program code, such as a ROM, a RAM, a magnetic disk, or an optical disc.

[0255] FIG. 24 is a schematic structural diagram of Embodiment 1 of a base station according to the present invention. The base station may be a second base station in the foregoing method embodiment. As shown in FIG. 24, the base station includes a receiving module 11 and a sending module 12. The receiving module 11 is configured to receive resource configuration information of a first base station. The sending module 12 is configured to send the resource configuration information of the first base station to user equipment (UE). The resource configuration information of the first base station is used to configure a resource for device-to-device (D2D) communication between the UE and the base station.

[0256] The base station provided in this embodiment of the present invention can execute the foregoing method embodiment. An implementation principle and a technical effect of this embodiment are similar to those of the foregoing method embodiment thereof are similar, and details are not repeatedly described herein.

[0257] Further, the sending module 12 is further configured to: before the receiving module 11 receives the resource configuration information of the first base station, notify the first base station that the base station supports D2D communication. Still further, the sending module 12 is specifically configured to send the resource configuration information of the first base station to the UE by using the resource configured by using the resource configuration information of the first base station.

[0258] In a possible implementation of this embodiment of the present invention, the sending module 12 is further configured to send a reference signal to the UE before sending the resource configuration information of the first base station to the user equipment (UE). The reference signal is used to instruct the UE to send a setup request message. The receiving module 11 is further configured to receive the setup request message. The setup request message is used to request the base station to send the resource configuration information of the first base station to the UE, and the setup request message is an RRC connection setup request message.

[0259] Optionally, when the setup request message is directly sent by the UE to the base station, the sending module 12 is specifically configured to send a setup response message to the UE. The setup response message includes the resource configuration information of the first base station. The setup response message is an RRC connection setup response message.

[0260] Optionally, when the setup request message is sent by the UE to the base station by using the first base station, the sending module 12 is specifically configured to send a setup response message to the UE according to an identifier of the UE. The setup response message includes the resource configuration information of the first base station. The setup request message includes the identifier of the UE and first indication information. The first indication information is used to notify the base station that the UE supports D2D communication with the base station. The setup response message is an RRC connection setup response message.

[0261] In another possible implementation of this embodiment of the present invention, the receiving module 11 is specifically configured to receive identifier information of the UE sent by the first base station. The identifier information of the UE is used to notify the base station that the UE supports D2D communication with the base station. The sending module 12 is specifically configured to send the resource configuration information of the first base station to the UE according to the identifier information of the UE.

[0262] Optionally, the identifier information of the UE is further used to indicate that the base station serves as a second serving cell of the UE.

[0263] In another possible implementation of this embodiment of the present invention, optionally, the receiving module 11 is further configured to: after the sending module 12 sends the resource configuration information of the first base station to the UE according to the identifier information of the UE, receive data sent by the first base station. The sending module 12 is further configured to send the data to the UE according to the resource configured by using the resource configuration information of the first base station.

[0264] Optionally, the sending module 12 is specifically configured to send the resource configuration information of the first base station to the UE by using the first base station.

[0265] Optionally, the receiving module 11 is specifically configured to receive an RRC connection setup request message sent by the UE. The sending module 12 is specifically configured to send an RRC connection setup response message to the UE. The RRC connection setup response message includes the resource configuration information of the first base station.

[0266] Optionally, the resource configured by using the resource configuration information of the first base station includes an uplink resource of the first base station and/or a downlink resource of the first base station.

[0267] The base station provided in this embodiment of the present invention can execute the foregoing method embodiment. An implementation principle and a technical effect of this embodiment are similar to those of the foregoing method embodiment are similar, and details are not repeatedly described herein.

[0268] Embodiment 2 of the present invention provides a base station. The base station may be a first base station in the foregoing method embodiment. The base station includes a sending module 21, configured to send resource configuration information of the base station to a second base station. The resource configuration information of the base station is used to configure a resource for device-to-device (D2D) communication between user equipment (UE) and the second base station.

[0269] The base station provided in this embodiment of the present invention can execute the foregoing method embodiment. An implementation principle and a technical effect of this embodiment are similar to those of the foregoing method embodiment are similar, and details are not repeatedly described herein.

[0270] FIG. 25 is a schematic structural diagram of Embodiment 3 of a base station according to the present invention. Based on the foregoing embodiment shown in FIG. 24, the base station further includes a processing module 22. The processing module 22 is configured to determine, according to an indication of the second base station, that the second base station supports D2D communication.

[0271] Still further, the base station further includes a receiving module 23. The sending module 21 is further configured to send a first message to the UE after sending the resource configuration information of the base station to the second base station. The first message is used to notify the UE that the second base station supports D2D communication. The receiving module 23 is configured to receive an RRC connection setup request message that is sent by the UE and that carries first indication information. The first indication information is used to notify the base station that the UE supports D2D communication with the second base station. The sending module 21 is further configured to: add an identifier of the UE to the RRC connection setup request message, and send the RRC connection setup request message to the second base station, so that the second base station sends an RRC connection setup response message to the UE according to the identifier of the UE. The RRC connection setup response message includes the resource configuration information of the base station.

[0272] The base station provided in this embodiment of the present invention can execute the foregoing method embodiment. An implementation principle and a technical effect of this embodiment are similar to those of the foregoing method embodiment are similar, and details are not repeatedly described herein.

[0273] Still referring to FIG. 25, the sending module 21 is further configured to: send a first message to the UE, and send a measurement instruction to the UE. The first message is used to notify the UE that the second base station supports D2D communication. The measurement instruction is used to instruct the UE to measure signal received strength of a reference signal sent by the second base station. The processing module 22 is further configured to determine, according to the signal received strength that is of the reference signal, reported by the UE, and received by the receiving module 23, that the UE supports D2D communication with the second base station. The sending module 21 is further configured to: send identifier information of the UE to the second base station, and send, to the UE, second indication information that carries a first identifier. The identifier information of the UE is used to notify the second base station that the UE supports D2D communication with the second base station. The second indication information is used to instruct the UE to perform D2D communication with the second base station corresponding to the first identifier.

[0274] Further, the identifier information of the UE is further used to indicate that the second base station serves as a second serving cell of the UE.

[0275] Optionally, the receiving module 23 is further configured to: after the sending module 21 sends the identifier information of the UE to the second base station, and sends, to the UE, the second indication information that carries the first identifier, receive the resource configuration information of the base station sent by the second base station corresponding to the first identifier. The sending module 21 is further configured to send the resource configuration information of the base station to the UE.

[0276] The base station provided in this embodiment of the present invention can execute the foregoing method embodiment. An implementation principle and a technical effect of this embodiment are similar to those of the foregoing method embodiment are similar, and details are not repeatedly described herein.

[0277] FIG. 26 is a schematic structural diagram of Embodiment 1 of user equipment according to the present invention. As shown in FIG. 26, the UE includes: a receiving module 31, configured to receive resource configuration information of a first base station sent by a second base station; and a processing module 32, configured to determine, according to the resource configuration information of the first base station, a communications resource required for D2D communication.

[0278] The UE provided in this embodiment of the present invention can execute the foregoing method embodiment. An implementation principle and a technical effect of this embodiment are similar to those of the foregoing method embodiment are similar, and details are not repeatedly described herein.

[0279] Further, the receiving module 31 is specifically configured to receive the resource configuration information of the first base station sent by the second base station by using a resource configured by using the resource configuration information of the first base station.

[0280] FIG. 27 is a schematic structural diagram of Embodiment 2 of user equipment according to the present invention. Based on the foregoing embodiment, the UE further includes a sending module 33. In this embodiment, the receiving module 31 is further configured to: before receiving the resource configuration information of the first base station sent by the second base station, receive a reference signal sent by the second base station. The reference signal is used to instruct the UE to send a setup request message. The sending module 33 is configured to send the setup request message. The setup request message is used to request the second base station to send the resource configuration information of the first base station to the UE.

[0281] In a possible implementation of this embodiment of the present invention, the receiving module 31 is specifically configured to receive a first message sent by the first base station. The first message is used to notify the UE that the second base station supports D2D communication. The processing module 32 is specifically configured to: measure signal received strength of the reference signal, and determine, according to the signal received strength of the reference signal, that the UE supports D2D communication with the second base station. The sending module 33 is specifically configured to send the setup request message after the processing module 32 determines, according to the signal received strength of the reference signal, that the UE supports D2D communication with the second base station. The setup request message is an RRC connection setup request message.

[0282] Optionally, the receiving module 31 is specifically configured to receive a setup response message sent by the second base station. The setup response message includes the resource configuration information of the first base station, and the setup request message is directly sent by the UE to the second base station.

[0283] Optionally, the setup request message includes an identifier of the UE and first indication information. The first indication information is used to notify the second base station that the UE supports D2D communication with the second base station. The receiving module 31 is specifically configured to receive a setup response message sent by the second base station according to the identifier of the UE. The setup response message includes the resource configuration information of the first base station. The setup request message is sent by the UE to the second base station by using the first base station. The setup response message is an RRC connection setup response message.

[0284] In another possible implementation of this embodiment of the present invention, the processing module 32 is specifically configured to measure, according to a measurement instruction sent by the first base station, signal received strength of a reference signal sent by the second base station. The sending module 33 is specifically configured to report the signal received strength of the reference signal to the first base station, so that the first base station sends identifier information of the UE to the second base station after determining, according to the signal received strength of the reference signal, that the UE supports D2D communication with the second base station. The identifier information of the UE is used to notify the second base station that the UE supports D2D communication with the second base station. The receiving module 31 is specifically configured to: receive second indication information that is sent by the first base station and that carries a first identifier, and receive the resource configuration information of the first base station sent by the second base station corresponding to the first identifier. The second indication information is used to instruct the UE to perform D2D communication with the second base station corresponding to the first identifier.

[0285] Further, the identifier information of the UE is further used to indicate that the second base station serves as a second serving cell of the UE.

[0286] Optionally, the receiving module 31 is specifically configured to receive the resource configuration information of the first base station sent by using the first base station by the second base station corresponding to the first identifier.

[0287] Optionally, the sending module 33 is specifically configured to send an RRC connection setup request message to the second base station corresponding to the first identifier. The receiving module 31 is specifically configured to receive an RRC connection setup response message sent by the second base station corresponding to the first identifier. The RRC connection setup response message includes the resource configuration information of the first base station.

[0288] The UE provided in this embodiment of the present invention can execute the foregoing method embodiment. An implementation principle and a technical effect of this embodiment are similar to those of the foregoing method embodiment are similar, and details are not repeatedly described herein.

[0289] FIG. 28 is a schematic structural diagram of Embodiment 4 of a base station according to the present invention. The base station may be a second base station in the foregoing method embodiment. As shown in FIG. 28, the base station includes: a receiving module 41, configured to receive resource configuration information of a first base station, where the resource configuration information of the first base station is used to configure a resource for device-to-device (D2D) communication between UE and the base station, and is used to set a mode of communication between the base station and the first base station to a D2D communication mode; and a processing module 42, configured to perform D2D communication with the first base station by using the resource configured by using the resource configuration information of the first base station.

[0290] The base station provided in this embodiment of the present invention can execute the foregoing method embodiment. An implementation principle and a technical effect of this embodiment are similar to those of the foregoing method embodiment are similar, and details are not repeatedly described herein.

[0291] FIG. 29 is a schematic structural diagram of Embodiment 5 of a base station according to the present invention. The base station may be a second base station in the foregoing method embodiment. As shown in FIG. 29, the base station includes a receiver 51 and a transmitter 52. The receiver 51 is configured to receive resource configuration information of a first base station. The transmitter 52 is configured to send the resource configuration information of the first base station to user equipment (UE). The resource configuration information of the first base station is used to configure a resource for device-to-device (D2D) communication between the UE and the base station.

[0292] The base station provided in this embodiment of the present invention can execute the foregoing method embodiment. An implementation principle and a technical effect of this embodiment are similar to those of the foregoing method embodiment are similar, and details are not repeatedly described herein.

[0293] Further, the transmitter 52 is further configured to: before the receiver 51 receives the resource configuration information of the first base station, notify the first base station that the base station supports D2D communication. Still further, the transmitter 52 is specifically configured to send the resource configuration information of the first base station to the UE by using the resource configured by using the resource configuration information of the first base station.

[0294] In a possible implementation of this embodiment of the present invention, the transmitter 52 is further configured to send a reference signal to the UE before sending the resource configuration information of the first base station to the user equipment (UE). The reference signal is used to instruct the UE to send a setup request message. The receiver 51 is further configured to receive the setup request message. The setup request message is used to request the base station to send the resource configuration information of the first base station to the UE, and the setup request message is an RRC connection setup request message.

[0295] Optionally, when the setup request message is directly sent by the UE to the base station, the transmitter 52 is specifically configured to send a setup response message to the UE. The setup response message includes the resource configuration information of the first base station. The setup response message is an RRC connection setup response message.

[0296] Optionally, when the setup request message is sent by the UE to the base station by using the first base station, the transmitter 52 is specifically configured to send a setup response message to the UE according to an identifier of the UE. The setup response message includes the resource configuration information of the first base station. The setup request message includes the identifier of the UE and first indication information. The first indication information is used to notify the base station that the UE supports D2D communication with the base station. The setup response message is an RRC connection setup response message.

[0297] In another possible implementation of this embodiment of the present invention, the receiver 51 is specifically configured to receive identifier information of the UE sent by the first base station. The identifier information of the UE is used to notify the base station that the UE supports D2D communication with the base station. The transmitter 52 is specifically configured to send the resource configuration information of the first base station to the UE according to the identifier information of the UE.

[0298] Optionally, the identifier information of the UE is further used to indicate that the base station serves as a second serving cell of the UE.

[0299] In another possible implementation of this embodiment of the present invention, optionally, the receiver 51 is further configured to: after the transmitter 52 sends the resource configuration information of the first base station to the UE according to the identifier information of the UE, receive data sent by the first base station. The transmitter 52 is further configured to send the data to the UE according to the resource configured by using the resource configuration information of the first base station.

[0300] Optionally, the transmitter 52 is specifically configured to send the resource configuration information of the first base station to the UE by using the first base station.

[0301] Optionally, the receiver 51 is specifically configured to receive an RRC connection setup request message sent by the UE. The transmitter 52 is specifically configured to send an RRC connection setup response message to the UE. The RRC connection setup response message includes the resource configuration information of the first base station.

[0302] Optionally, the resource configured by using the resource configuration information of the first base station includes an uplink resource of the first base station and/or a downlink resource of the first base station.

[0303] The base station provided in this embodiment of the present invention can execute the foregoing method embodiment. An implementation principle and a technical effect of this embodiment are similar to those of the foregoing method embodiment are similar, and details are not repeatedly described herein.

[0304] Embodiment 6 of the present invention provides a base station. The base station may be a first base station in the foregoing method embodiment. The base station includes a transmitter 61, configured to send resource configuration information of the base station to a second base station. The resource configuration information of the base station is used to configure a resource for device-to-device (D2D) communication between user equipment (UE) and the second base station.

[0305] The base station provided in this embodiment of the present invention can execute the foregoing method embodiment. An implementation principle and a technical effect of this embodiment are similar to those of the foregoing method embodiment are similar, and details are not repeatedly described herein.

[0306] FIG. 30 is a schematic structural diagram of Embodiment 7 of a base station according to the present invention. Based on the foregoing embodiment shown in FIG. 29, the base station further includes a processor 62. The processor 62 is configured to determine, according to an indication of the second base station, that the second base station supports D2D communication.

[0307] Still further, the base station further includes a receiver 63. The transmitter 61 is further configured to send a first message to the UE after sending the resource configuration information of the base station to the second base station. The first message is used to notify the UE that the second base station supports D2D communication. The receiver 63 is configured to receive an RRC connection setup request message that is sent by the UE and that carries first indication information. The first indication information is used to notify the base station that the UE supports D2D communication with the second base station. The transmitter 61 is further configured to: add an identifier of the UE to the RRC connection setup request message, and send the RRC connection setup request message to the second base station, so that the second base station sends an RRC connection setup response message to the UE according to the identifier of the UE. The RRC connection setup response message includes the resource configuration information of the base station.

[0308] The base station provided in this embodiment of the present invention can execute the foregoing method embodiment. An implementation principle and a technical effect of this embodiment are similar to those of the foregoing method embodiment are similar, and details are not repeatedly described herein.

[0309] Still referring to FIG. 30, the transmitter 61 is further configured to: send a first message to the UE, and send a measurement instruction to the UE. The first message is used to notify the UE that the second base station supports D2D communication. The measurement instruction is used to instruct the UE to measure signal received strength of a reference signal sent by the second base station. The processor 62 is further configured to determine, according to the signal received strength that is of the reference signal, reported by the UE, and received by the receiver 63, that the UE supports D2D communication with the second base station. The transmitter 61 is further configured to: send identifier information of the UE to the second base station, and send, to the UE, second indication information that carries a first identifier. The identifier information of the UE is used to notify the second base station that the UE supports D2D communication with the second base station. The second indication information is used to instruct the UE to perform D2D communication with the second base station corresponding to the first identifier. Further, the identifier information of the UE is further used to indicate that the second base station serves as a second serving cell of the UE.

[0310] Optionally, the receiver 63 is further configured to: after the transmitter 61 sends the identifier information of the UE to the second base station, and sends, to the UE, the second indication information that carries the first identifier, receive the resource configuration information of the base station sent by the second base station corresponding to the first identifier. The transmitter 61 is further configured to send the resource configuration information of the base station to the UE.

[0311] The base station provided in this embodiment of the present invention can execute the foregoing method embodiment. An implementation principle and a technical effect of this embodiment are similar to those of the foregoing method embodiment are similar, and details are not repeatedly described herein.

[0312] FIG. 31 is a schematic structural diagram of Embodiment 3 of user equipment according to the present invention. As shown in FIG. 31, the UE includes: a receiver 71, configured to receive resource configuration information of a first base station sent by a second base station; and a processor 72, configured to determine, according to the resource configuration information of the first base station, a communications resource required for D2D communication.

[0313] The UE provided in this embodiment of the present invention can execute the foregoing method embodiment. An implementation principle and a technical effect of this embodiment are similar to those of the foregoing method embodiment are similar, and details are not repeatedly described herein.

[0314] Further, the receiver 71 is specifically configured to receive the resource configuration information of the first base station sent by the second base station by using a resource configured by using the resource configuration information of the first base station.

[0315] FIG. 32 is a schematic structural diagram of Embodiment 4 of user equipment according to the present invention. Based on the foregoing embodiment, the UE further includes a transmitter 73. In this embodiment, the receiver 71 is further configured to: before receiving the resource configuration information of the first base station sent by the second base station, receive a reference signal sent by the second base station. The reference signal is used to instruct the UE to send a setup request message. The transmitter 73 is configured to send the setup request message. The setup request message is used to request the second base station to send the resource configuration information of the first base station to the UE.

[0316] In a possible implementation of this embodiment of the present invention, the receiver 71 is specifically configured to receive a first message sent by the first base station. The first message is used to notify the UE that the second base station supports D2D communication. The processor 72 is specifically configured to: measure signal received strength of the reference signal, and determine, according to the signal received strength of the reference signal, that the UE supports D2D communication with the second base station. The transmitter 73 is specifically configured to send the setup request message after the processor 72 determines, according to the signal received strength of the reference signal, that the UE supports D2D communication with the second base station. The setup request message is an RRC connection setup request message. Optionally, the receiver 71 is specifically configured to receive a setup response message sent by the second base station. The setup response message includes the resource configuration information of the first base station, and the setup request message is directly sent by the UE to the second base station.

[0317] Optionally, the setup request message includes an identifier of the UE and first indication information. The first indication information is used to notify the second base station that the UE supports D2D communication with the second base station. The receiver 71 is specifically configured to receive a setup response message sent by the second base station according to the identifier of the UE. The setup response message includes the resource configuration information of the first base station. The setup request message is sent by the UE to the second base station by using the first base station. The setup response message is an RRC connection setup response message.

[0318] In another possible implementation of this embodiment of the present invention, the processor 72 is specifically configured to measure, according to a measurement instruction sent by the first base station, signal received strength of a reference signal sent by the second base station. The transmitter 73 is specifically configured to report the signal received strength of the reference signal to the first base station, so that the first base station sends identifier information of the UE to the second base station after determining, according to the signal received strength of the reference signal, that the UE supports D2D communication with the second base station. The identifier information of the UE is used to notify the second base station that the UE supports D2D communication with the second base station. The receiver 71 is specifically configured to: receive second indication information that is sent by the first base station and that carries a first identifier, and receive the resource configuration information of the first base station sent by the second base station corresponding to the first identifier. The second indication information is used to instruct the UE to perform D2D communication with the second base station corresponding to the first identifier.

[0319] Further, the identifier information of the UE is further used to indicate that the second base station serves as a second serving cell of the UE.

[0320] Optionally, the receiver 71 is specifically configured to receive the resource configuration information of the first base station sent by using the first base station by the second base station corresponding to the first identifier.

[0321] Optionally, the transmitter 73 is specifically configured to send an RRC connection setup request message to the second base station corresponding to the first identifier. The receiver 71 is specifically configured to receive an RRC connection setup response message sent by the second base station corresponding to the first identifier. The RRC connection setup response message includes the resource configuration information of the first base station.

[0322] The UE provided in this embodiment of the present invention can execute the foregoing method embodiment. An implementation principle and a technical effect of this embodiment are similar to those of the foregoing method embodiment are similar, and details are not repeatedly described herein.

[0323] FIG. 33 is a schematic structural diagram of Embodiment 8 of a base station according to the present invention. The base station may be a second base station in the foregoing method embodiment. As shown in FIG. 33, the base station includes: a receiver 81, configured to receive resource configuration information of a first base station, where the resource configuration information of the first base station is used to configure a resource for device-to-device (D2D) communication between UE and the base station, and is used to set a mode of communication between the base station and the first base station to a D2D communication mode; and a processor 82, configured to perform D2D communication with the first base station by using the resource configured by using the resource configuration information of the first base station.

[0324] The base station provided in this embodiment of the present invention can execute the foregoing method embodiment. An implementation principle and a technical effect of this embodiment are similar to those of the foregoing method embodiment are similar, and details are not repeatedly described herein.

[0325] Finally, it should be noted that the foregoing embodiments are merely intended for describing the technical solutions of the present invention, but not for limiting the present invention.


Claims

1. A resource allocation method, comprising:

receiving (S302, S402, S502, S602), by a second base station, resource configuration information of a first base station, wherein the resource configuration information of the first base station includes an uplink resource of the first base station and/or a downlink resource of the first base station;

sending (S303, S403), by the second base station, a reference signal to user equipment, UE, wherein the reference signal is used to instruct the UE to send a setup request message;

receiving (S304, S404), by the second base station, the setup request message after the first base station has notified the UE that the second base station supports D2D communication and the UE has determined, according to a measured signal received strength of the reference signal, that the UE meets a preset condition of performing D2D communication with the second base station, wherein the setup request message is directly sent by the UE to the second base station or is sent by the UE to the second base station using the first base station, and the setup request message is used to request the second base station to send the resource configuration information of the first base station to the UE;

sending (S305, S405), by the second base station, the resource configuration information of the first base station to the UE, wherein the resource configuration information of the first base station is used to configure a resource for device-to-device, D2D, communication between the UE and the second base station; and

performing, by the second base station with the UE, D2D communication, such that the uplink resource or the downlink resource of the first base station is reused.


 
2. The method according to claim 1, wherein before the receiving, by a second base station, resource configuration information of a first base station, the method further comprises:
notifying (S301, S401, S501, S601), by the second base station, the first base station that the second base station supports D2D communication.
 
3. The method according to claim 1 or 2, wherein the sending (305), by the second base station, the resource configuration information of the first base station to UE comprises:
sending, by the second base station, the resource configuration information of the first base station to the UE by using the resource configured by using the resource configuration information of the first base station.
 
4. The method according to any one of claims 1 to 3, wherein the setup request message is an RRC connection setup request message, the setup request message is directly sent by the UE to the second base station, and the second base station sends a setup response message to the UE, where the setup response message includes the resource configuration information of the first base station, and the setup response message is an RRC connection setup response message.
 
5. The method according to any one of claims 1 to 3, wherein the setup request message is sent by the UE to the second base station by using the first base station, the setup request message includes an identifier of the UE and first indication information, the first indication information is used to notify the second base station that the UE supports D2D communication with the second base station, and the setup request message is an RRC connection setup request message, and the second base station sends a setup response message to the UE according to the identifier of the UE, where the setup response message includes the resource configuration information of the first base station, and the setup response message is an RRC connection setup response message.
 
6. The method according to claim 4 or 5, further comprising:
when the second base station establishes an RRC connection to the UE, the second base station further establishes an S1 connection to a core network, so that the UE performs, by using the resource configured by using the resource configuration information of the first base station, data interaction with the core network by using the second base station.
 
7. The method according to any one of claims 1 to 6, wherein the first base station is a macro base station of a heterogenous network, the second base station is a micro base station of the heterogenous network, and the macro base station and the micro base station are logically connected by an X2 interface.
 
8. A resource allocation method, comprising:

receiving (S1201, S1301), by user equipment, UE, a reference signal sent by a second base station, wherein the reference signal is used to instruct the UE to send a setup request message;

receiving (S1202, S1302), by the UE, a first message sent by a first base station, where the first message is used to notify the UE that the second base station supports D2D communication;

measuring (S1203, S1303), by the UE, signal received strength of the reference signal, and determining, according to the signal received strength of the reference signal, that the UE supports device-to-device, D2D, communication with the second base station;

sending (S1204, S1305), by the UE, a setup request message, wherein the setup request message is directly sent by the UE to the second base station or is sent by the UE to the second base station using the first base station, and the setup request message is used to request the second base station to send the resource configuration information of the first base station to the UE;

receiving (S1101), by the, UE, resource configuration information of a first base station sent by the second base station, wherein the resource configuration information of the first base station includes an uplink resource of the first base station and/or a downlink resource of the first base station;

determining (S1102), by the UE according to the resource configuration information of the first base station, a communications resource required for D2D communication with the second base station; and

performing, by the UE with the second base station, D2D communication, such that the uplink resource or the downlink resource of the first base station is reused.


 
9. A second base station, comprising:

a receiving module (11), configured to receive resource configuration information of a first base station, wherein the resource configuration information of the first base station includes an uplink resource of the first base station and/or a downlink resource of the first base station; and

a sending module (12), configured to send a reference signal to user equipment, UE, wherein the reference signal is used to instruct the UE to send a setup request message;

wherein the receiving module (11) is further configured to receive the setup request message after the first base station has notified the UE that the second base station supports D2D communication and the UE has determined, according to a measured signal received strength of the reference signal, that the UE meets a preset condition of performing D2D communication with the second base station, wherein the setup request message is directly sent by the UE to the second base station or is sent by the UE to the second base station using the first base station, and the setup request message is used to request the second base station to send the resource configuration information of the first base station to the UE;

the sending module (12) is further configured to send the resource configuration information of the first base station to the UE, wherein the resource configuration information of the first base station is used to configure a resource for device-to-device, D2D, communication between the UE and the second base station; and

the second base station is configured to perform, with the UE, D2D communication, such that the uplink resource or the downlink resource of the first base station is reused.


 
10. The second base station according to claim 9, wherein the sending module (12) is further configured to: before the receiving module (11) receives the resource configuration information of the first base station, notify the first base station that the second base station supports D2D communication.
 
11. The second base station according to claim 9 or 10, wherein the sending module (12) is specifically configured to send the resource configuration information of the first base station to the UE by using the resource configured by using the resource configuration information of the first base station.
 
12. The second base station according to any one of claims 9 to 11, wherein the receiving module (11) is specifically configured to receive an RRC connection setup request message sent by the UE, the sending module (12) is specifically configured to send an RRC connection setup response message to the UE, and the RRC connection setup response message includes the resource configuration information of the first base station.
 
13. The second base station according to any one of claims 9 to 12, wherein the receiving module (11) is specifically configured to receive identifier information of the UE sent by the first base station, wherein the identifier information of the UE is used to notify the second base station that the UE supports D2D communication with the second base station; and
the sending module (12) is specifically configured to send the resource configuration information of the first base station to the UE according to the identifier information of the UE.
 
14. The second base station according to any one of claims 9 to 13, wherein the second base station is a micro base station of a heterogenous network, and the first base station is a macro base station of the heterogenous network logically connected to the micro base station by an X2 interface.
 
15. A user equipment, UE, comprising a receiving module (31), a processing module (32), and a sending module (33), wherein
the receiving module (31) is configured to receive a reference signal sent by the second base station, where the reference signal is used to instruct the UE to send a setup request message;
the receiving module (31) is further configured to receive a first message sent by a first base station, wherein the first message is used to notify the UE that the second base station supports D2D communication;
the processing module (32) is configured to measure signal received strength of the reference signal, and determine, according to the signal received strength of the reference signal, that the UE supports D2D communication with the second base station;
the sending module (33) is configured to send, after the processing module determines, according to the signal received strength of the reference signal, that the UE supports D2D communication with the second base station, a setup request message, where the setup request message is directly sent by the UE to the second base station or is sent by the UE to the second base station using the first base station, and the setup request message is used to request the second base station to send resource configuration information of the first base station to the UE;
the receiving module (31) is further configured to receive the resource configuration information of a first base station sent by a second base station, wherein the resource configuration information of the first base station includes an uplink resource of the first base station and/or a downlink resource of the first base station;
the processing module (32) is further configured to determine, according to the resource configuration information of the first base station, a communications resource required for D2D communication;
and the UE is configured to perform, with the second base station, D2D communication, such that the uplink resource or the downlink resource of the first base station is reused.
 


Ansprüche

1. Betriebsmittelzuordnungsverfahren, das Folgendes umfasst:

Empfangen (S302, S402, S502, S602) durch eine zweite Basisstation von Betriebsmittelkonfigurationsinformationen einer ersten Basisstation, wobei die Betriebsmittelkonfigurationsinformationen der ersten Basisstation ein Aufwärtsstreckenbetriebsmittel der ersten Basisstation und/oder ein Abwärtsstreckenbetriebsmittel der ersten Basisstation enthalten;

Senden (S303, S403) durch die zweite Basisstation eines Bezugssignals zu einem Anwendergerät, UE, wobei das Bezugssignal verwendet wird, um das UE anzuweisen, eine Einrichtungsanforderungsnachricht zu senden;

Empfangen (S304, S404) durch die zweite Basisstation der Einrichtungsanforderungsnachricht, nachdem die erste Basisstation das UE benachrichtigt hat, dass die zweite Basisstation D2D-Kommunikation unterstützt und das UE gemäß einer gemessenen Empfangssignalstärke des Bezugssignals bestimmt hat, dass das UE eine voreingestellte Bedingung zum Durchführen einer D2D-Kommunikation mit der zweiten Basisstation erfüllt, wobei die Einrichtungsanforderungsnachricht durch das UE direkt zur zweiten Basisstation gesendet wird oder durch das UE unter Verwendung der ersten Basisstation zur zweiten Basisstation gesendet wird, und die Einrichtungsanforderungsnachricht verwendet wird, um anzufordern, dass die zweite Basisstation die Betriebsmittelkonfigurationsinformationen der ersten Basisstation zum UE sendet;

Senden (S305, S405) durch die zweite Basisstation der Betriebsmittelkonfigurationsinformationen der ersten Basisstation zum UE, wobei die Betriebsmittelkonfigurationsinformationen der ersten Basisstation verwendet werden, ein Betriebsmittel zur Kommunikation zwischen Einrichtungen, D2D-Kommunikation, zwischen dem UE und der zweiten Basisstation zu konfigurieren; und

Durchführen durch die zweite Basisstation mit dem UE einer D2D-Kommunikation derart, dass das Aufwärtsstreckenbetriebsmittel oder das Abwärtsstreckenbetriebsmittel der ersten Basisstation wiederverwendet wird.


 
2. Verfahren nach Anspruch 1, wobei das Verfahren vor dem Empfangen durch eine zweite Basisstation von Betriebsmittelkonfigurationsinformationen einer ersten Basisstation ferner Folgendes umfasst:
Benachrichtigen (S301, S401, S501, S601) durch die zweite Basisstation der ersten Basisstation, dass die zweite Basisstation D2D-Kommunikation unterstützt.
 
3. Verfahren nach Anspruch 1 oder 2, wobei das Senden (305) durch die zweite Basisstation der Betriebsmittelkonfigurationsinformationen der ersten Basisstation zum UE Folgendes umfasst:
Senden durch die zweite Basisstation der Betriebsmittelkonfigurationsinformationen der ersten Basisstation zum UE unter Verwendung des Betriebsmittels, das unter Verwendung der Betriebsmittelkonfigurationsinformationen der ersten Basisstation konfiguriert wurde.
 
4. Verfahren nach einem der Ansprüche 1 bis 3, wobei die Einrichtungsanforderungsnachricht eine RRC-Verbindungseinrichtungsanforderungsnachricht ist, die Einrichtungsanforderungsnachricht durch das UE direkt zur zweiten Basisstation gesendet wird und die zweite Basisstation eine Einrichtungsantwortnachricht zum UE sendet, wobei die Einrichtungsantwortnachricht die Betriebsmittelkonfigurationsinformationen der ersten Basisstation enthält und die Einrichtungsantwortnachricht eine RRC-Verbindungseinrichtungsantwortnachricht ist.
 
5. Verfahren nach einem der Ansprüche 1 bis 3, wobei die Einrichtungsanforderungsnachricht durch das UE unter Verwendung der ersten Basisstation zur zweiten Basisstation gesendet wird, wobei die Einrichtungsanforderungsnachricht eine Kennung des UE und erste Anzeigeinformationen enthält, die ersten Anzeigeinformationen verwendet werden, um die zweite Basisstation zu benachrichtigen, dass das UE D2D-Kommunikation mit der zweiten Basisstation unterstützt, und die Einrichtungsanforderungsnachricht eine RRC-Verbindungseinrichtungsanforderungsnachricht ist, und die zweite Basisstation eine Einrichtungsantwortnachricht zum UE gemäß der Kennung des UE sendet, wobei die Einrichtungsantwortnachricht die Betriebsmittelkonfigurationsinformationen der ersten Basisstation enthält und die Einrichtungsantwortnachricht eine RRC-Verbindungseinrichtungsantwortnachricht ist.
 
6. Verfahren nach Anspruch 4 oder 5, das ferner Folgendes umfasst:
dann, wenn die zweite Basisstation eine RRC-Verbindung mit dem UE aufbaut, die zweite Basisstation ferner eine S1-Verbindung mit einem Kernnetz aufbaut, derart, dass das UE unter Verwendung des Betriebsmittels, das unter Verwendung der Betriebsmittelkonfigurationsinformationen der ersten Basisstation konfiguriert wurde, eine Dateninteraktion mit dem Kernnetz unter Verwendung der zweiten Basisstation durchführt.
 
7. Verfahren nach einem der Ansprüche 1 bis 6, wobei die erste Basisstation eine Makrobasisstation eines heterogenen Netzes ist, die zweite Basisstation eine Mikrobasisstation des heterogenen Netzes ist und die Makrobasisstation und die Mikrobasisstation durch eine X2-Schnittstelle logisch verbunden sind.
 
8. Betriebsmittelzuordnungsverfahren, das Folgendes umfasst:

Empfangen (S1201, S1301) durch ein Anwendergerät, UE, eines Bezugssignals, das durch eine zweite Basisstation gesendet wurde, wobei das Bezugssignal verwendet wird, um das UE anzuweisen, eine Einrichtungsanforderungsnachricht zu senden;

Empfangen (S1202, S1302) durch das UE einer ersten Nachricht, die durch eine erste Basisstation gesendet wurde, wobei die erste Nachricht verwendet wird, um das UE zu benachrichtigen, dass die zweite Basisstation D2D-Kommunikation unterstützt;

Messen (S1203, S1303) durch das UE einer Empfangssignalstärke des Bezugssignals und Bestimmen gemäß der Empfangssignalstärke des Bezugssignals, dass das UE eine Kommunikation zwischen Einrichtung, D2D-Kommunikation, mit der zweiten Basisstation unterstützt;

Senden (S1204, S1305) durch das UE einer Einrichtungsanforderungsnachricht, wobei die Einrichtungsanforderungsnachricht durch das UE direkt zur zweiten Basisstation gesendet wird oder durch das UE unter Verwendung der ersten Basisstation zur zweiten Basisstation gesendet wird und die Einrichtungsanforderungsnachricht verwendet wird, um anzufordern, dass die zweite Basisstation die Betriebsmittelkonfigurationsinformationen der ersten Basisstation zum UE sendet;

Empfangen (S1101) durch das UE von Betriebsmittelkonfigurationsinformationen einer ersten Basisstation, die durch die zweite Basisstation gesendet wurden, wobei die Betriebsmittelkonfigurationsinformationen der ersten Basisstation ein Aufwärtsstreckenbetriebsmittel der ersten Basisstation und/oder ein Abwärtsstreckenbetriebsmittel der ersten Basisstation enthalten;

Bestimmen (S1102) durch das UE gemäß den Betriebsmittelkonfigurationsinformationen der ersten Basisstation eines Kommunikationsbetriebsmittels, das zur D2D-Kommunikation mit einer zweiten Basisstation erforderlich ist; und

Durchführen durch das UE einer D2D-Kommunikation mit der zweiten Basisstation derart, dass das Aufwärtsstreckenbetriebsmittel oder das Abwärtsstreckenbetriebsmittel der ersten Basisstation wiederverwendet wird.


 
9. Zweite Basisstation, die Folgendes umfasst:

ein Empfangsmodul (11), das konfiguriert ist, Betriebsmittelkonfigurationsinformationen einer ersten Basisstation zu empfangen, wobei die Betriebsmittelkonfigurationsinformationen der ersten Basisstation ein Aufwärtsstreckenbetriebsmittel der ersten Basisstation und/oder ein Abwärtsstreckenbetriebsmittel der ersten Basisstation enthalten; und

ein Sendemodul (12), das konfiguriert ist, ein Bezugssignal zu einem Anwendergerät, UE, wobei das Bezugssignal verwendet wird, um das UE anzuweisen, eine Einrichtungsanforderungsnachricht zu senden; wobei

das Empfangsmodul (11) ferner konfiguriert ist, die Einrichtungsanforderungsnachricht zu empfangen, nachdem die erste Basisstation das UE benachrichtigt hat, dass die zweite Basisstation D2D-Kommunikation unterstützt und das UE gemäß einer gemessenen Empfangssignalstärke des Bezugssignals bestimmt hat, dass das UE eine voreingestellte Bedingung zum Durchführen einer D2D-Kommunikation mit der zweiten Basisstation erfüllt, wobei die Einrichtungsanforderungsnachricht durch das UE direkt zur zweiten Basisstation gesendet wird oder durch das UE unter Verwendung der ersten Basisstation zur zweiten Basisstation gesendet wird, und die Einrichtungsanforderungsnachricht verwendet wird, um anzufordern, dass die zweite Basisstation die Betriebsmittelkonfigurationsinformationen der ersten Basisstation zum UE sendet;

das Sendemodul (12) ferner konfiguriert ist, die Betriebsmittelkonfigurationsinformationen der ersten Basisstation zum UE zu senden, wobei die Betriebsmittelkonfigurationsinformationen der ersten Basisstation verwendet werden, ein Betriebsmittel zur Kommunikation zwischen Einrichtungen, D2D-Kommunikation, zwischen dem UE und der zweiten Basisstation zu konfigurieren; und

die zweite Basisstation konfiguriert ist, mit dem UE einer D2D-Kommunikation derart durchzuführen, dass das Aufwärtsstreckenbetriebsmittel oder das Abwärtsstreckenbetriebsmittel der ersten Basisstation wiederverwendet wird.


 
10. Zweite Basisstation nach Anspruch 9, wobei das Sendemodul (12) ferner konfiguriert ist zum: Benachrichtigen der ersten Basisstation, dass die zweite Basisstation D2D-Kommunikation unterstützt, bevor das Empfangsmodul (11) die Betriebsmittelkonfigurationsinformationen der ersten Basisstation empfängt.
 
11. Zweite Basisstation nach Anspruch 9 oder 10, wobei das Sendemodul (12) speziell konfiguriert ist, die Betriebsmittelkonfigurationsinformationen der ersten Basisstation unter Verwendung des Betriebsmittels, das unter Verwendung der Betriebsmittelkonfigurationsinformationen der ersten Basisstation konfiguriert wurde, zum UE zu senden.
 
12. Zweite Basisstation nach einem der Ansprüche 9 bis 11, wobei das Empfangsmodul (11) speziell konfiguriert ist, eine RRC-Verbindungseinrichtungsanforderungsnachricht, die durch das UE gesendet wurde, zu empfangen, das Sendemodul (12) speziell konfiguriert ist, eine RRC-Verbindungseinrichtungsantwortnachricht zum UE zu senden, und die RRC-Verbindungseinrichtungsantwortnachricht die Betriebsmittelkonfigurationsinformationen der ersten Basisstation enthält.
 
13. Zweite Basisstation nach einem der Ansprüche 9 bis 12, wobei das Empfangsmodul (11) speziell konfiguriert ist, Kennungsinformationen des UE, die durch die erste Basisstation gesendet wurden, zu empfangen, wobei die Kennungsinformationen des UE verwendet werden, die zweite Basisstation zu benachrichtigen, dass das UE D2D-Kommunikation mit der zweiten Basisstation unterstützt; und
das Sendemodul (12) speziell konfiguriert ist, die Betriebsmittelkonfigurationsinformationen der ersten Basisstation zum UE gemäß der Kennungsinformationen des UE zu senden.
 
14. Zweite Basisstation nach einem der Ansprüche 9 bis 13, wobei die zweite Basisstation eine Mikrobasisstation eines heterogenen Netzes ist und die erste Basisstation eine Makrobasisstation des heterogenen Netzes ist, die mit der Mikrobasisstation durch eine X2-Schnittstelle logisch verbunden ist.
 
15. Anwendergerät, UE, das ein Empfangsmodul (31), ein Verarbeitungsmodul (32) und ein Sendemodul (33) umfasst, wobei
das Empfangsmodul (31) konfiguriert ist, ein Bezugssignal, das durch eine zweite Basisstation gesendet wurde, zu empfangen, wobei das Bezugssignal verwendet wird, um das UE anzuweisen, eine Einrichtungsanforderungsnachricht zu senden;
das Empfangsmodul (31) ferner konfiguriert ist, eine erste Nachricht, die durch eine erste Basisstation gesendet wurde, zu empfangen, wobei die erste Nachricht verwendet wird, um das UE zu benachrichtigen, dass die zweite Basisstation D2D-Kommunikation unterstützt;
das Verarbeitungsmodul (32) konfiguriert ist, eine Empfangssignalstärke des Bezugssignals zu messen und gemäß der Empfangssignalstärke des Bezugssignals zu bestimmen, dass das UE eine D2D-Kommunikation mit der zweiten Basisstation unterstützt;
das Sendemodul (33) konfiguriert ist, nachdem das Verarbeitungsmodul gemäß der Empfangssignalstärke des Bezugssignals bestimmt hat, dass das UE eine D2D-Kommunikation mit der zweiten Basisstation unterstützt, eine Einrichtungsanforderungsnachricht zu senden, wobei die Einrichtungsanforderungsnachricht durch das UE direkt zur zweiten Basisstation gesendet wird oder durch das UE unter Verwendung der ersten Basisstation zur zweiten Basisstation gesendet wird und die Einrichtungsanforderungsnachricht verwendet wird, um anzufordern, dass die zweite Basisstation die Betriebsmittelkonfigurationsinformationen der ersten Basisstation zum UE sendet; das Empfangsmodul (31) ferner konfiguriert ist, die Betriebsmittelkonfigurationsinformationen einer ersten Basisstation, die durch die zweite Basisstation gesendet wurden, zu empfangen, wobei die Betriebsmittelkonfigurationsinformationen der ersten Basisstation ein Aufwärtsstreckenbetriebsmittel der ersten Basisstation und/oder ein Abwärtsstreckenbetriebsmittel der ersten Basisstation enthalten;
das Verarbeitungsmodul (32) ferner konfiguriert ist, gemäß den Betriebsmittelkonfigurationsinformationen der ersten Basisstation ein Kommunikationsbetriebsmittels, das zur D2D-Kommunikation mit einer zweiten Basisstation erforderlich ist, zu bestimmen; und
das UE konfiguriert ist, eine D2D-Kommunikation mit der zweiten Basisstation derart durchzuführen, dass das Aufwärtsstreckenbetriebsmittel oder das Abwärtsstreckenbetriebsmittel der ersten Basisstation wiederverwendet wird.
 


Revendications

1. Procédé d'affectation de ressources, consistant à :

recevoir (S302, S402, S502, S602), par une seconde station de base, une information de configuration de ressource d'une première station de base, l'information de configuration de ressource de la première station de base incluant une ressource en liaison montante de la première station de base et/ou une ressource en liaison descendante de la première station de base ;

envoyer (S303, S403), par la seconde station de base, un signal de référence à un équipement d'utilisateur (UE), le signal de référence étant utilisé pour donner l'instruction à l'UE d'envoyer un message de demande d'établissement ;

recevoir (S304, S404), par la seconde station de base, le message de demande d'établissement une fois que la première station de base a notifié à l'UE que la seconde station de base prend en charge une communication D2D et que l'UE a déterminé, selon une puissance de signal reçue et mesurée du signal de référence, que l'UE satisfait à une condition prédéfinie de réalisation d'une communication D2D avec la seconde station de base, le message de demande d'établissement étant envoyé directement par l'UE à la seconde station de base ou étant envoyé par l'UE à la seconde station de base au moyen de la première station de base, et le message de demande d'établissement étant utilisé pour demander à la seconde station de base d'envoyer l'information de configuration de ressource de la première station de base à l'UE ;

envoyer (S305, S405), par la seconde station de base, l'information de configuration de ressource de la première station de base à l'UE, l'information de configuration de ressource de la première station de base étant utilisée pour configurer une ressource pour une communication de dispositif à dispositif (D2D) entre l'UE et la seconde station de base ; et

réaliser, par la seconde station de base avec l'UE, une communication D2D, de sorte que la ressource en liaison montante ou la ressource en liaison descendante de la première station de base soit réutilisée.


 
2. Procédé selon la revendication 1, le procédé consistant en outre, avant la réception, par une seconde station de base, d'une information de configuration de ressource d'une première station de base, à :
notifier (S301, S401, S501, S601), par la seconde station de base, à la première station de base que la seconde station de base prend en charge une communication D2D.
 
3. Procédé selon la revendication 1 ou 2, dans lequel l'envoi (305), par la seconde station de base, de l'information de configuration de ressource de la première station de base à un UE consiste à :
envoyer, par la seconde station de base, l'information de configuration de ressource de la première station de base à l'UE au moyen de la ressource configurée au moyen de l'information de configuration de ressource de la première station de base.
 
4. Procédé selon l'une quelconque des revendications 1 à 3, dans lequel le message de demande d'établissement est un message de demande d'établissement de connexion RRC, le message de demande d'établissement est envoyé directement par l'UE à la seconde station de base et la seconde station de base envoie un message de réponse d'établissement à l'UE, le message de réponse d'établissement incluant l'information de configuration de ressource de la première station de base et le message de réponse d'établissement étant un message de réponse d'établissement de connexion RRC.
 
5. Procédé selon l'une quelconque des revendications 1 à 3, dans lequel le message de demande d'établissement est envoyé par l'UE à la seconde station de base au moyen de la première station de base, le message de demande d'établissement inclut un identifiant de l'UE et une première information d'indication, la première information d'indication est utilisée pour notifier à la seconde station de base que l'UE prend en charge une communication D2D avec la seconde station de base et le message de demande d'établissement est un message de demande d'établissement de connexion RRC, et la seconde station de base envoie un message de réponse d'établissement à l'UE selon l'identifiant de l'UE, le message de réponse d'établissement incluant l'information de configuration de ressource de la première station de base et le message de réponse d'établissement étant un message de réponse d'établissement de connexion RRC.
 
6. Procédé selon la revendication 4 ou 5, consistant en outre à :
quand la seconde station de base établit une connexion RRC avec l'UE, établir en outre, par la seconde station de base, une connexion SI avec un réseau central de sorte que l'UE réalise, au moyen de la ressource configurée au moyen de l'information de configuration de ressource de la première station de base, une interaction de données avec le réseau central au moyen de la seconde station de base.
 
7. Procédé selon l'une quelconque des revendications 1 à 6, dans lequel la première station de base est une macrostation de base d'un réseau hétérogène, la seconde station de base est une microstation de base du réseau hétérogène et la macrostation de base et la microstation de base sont connectées logiquement par une interface X2.
 
8. Procédé d'affectation de ressources, consistant à :

recevoir (S1201, S1301), par un équipement d'utilisateur (UE), un signal de référence envoyé par une seconde station de base, le signal de référence étant utilisé pour donner l'instruction à l'UE d'envoyer un message de demande d'établissement ;

recevoir (S1202, S1302), par l'UE, un premier message envoyé par une première station de base, le premier message étant utilisé pour notifier à l'UE que la seconde station de base prend en charge une communication D2D ;

mesurer (S1203, S1303), par l'UE, une puissance de signal reçue du signal de référence et déterminer, selon la puissance de signal reçue du signal de référence, que l'UE prend en charge une communication de dispositif à dispositif (D2D) avec la seconde station de base ;

envoyer (S1204, S1305), par l'UE, un message de demande d'établissement, le message de demande d'établissement étant envoyé directement par l'UE à la seconde station de base ou étant envoyé par l'UE à la seconde station de base au moyen de la première station de base, et le message de demande d'établissement étant utilisé pour demander à la seconde station de base d'envoyer l'information de configuration de ressource de la première station de base à l'UE ;

recevoir (S1101), par l'UE, une information de configuration de ressource d'une première station de base envoyée par la seconde station de base, l'information de configuration de ressource de la première station de base incluant une ressource en liaison montante de la première station de base et/ou une ressource en liaison descendante de la première station de base ;

déterminer (S1102), par l'UE selon l'information de configuration de ressource de la première station de base, une ressource de communication requise pour une communication D2D avec la seconde station de base ; et

réaliser, par l'UE avec la seconde station de base, une communication D2D, de sorte que la ressource en liaison montante ou la ressource en liaison descendante de la première station de base soit réutilisée.


 
9. Seconde station de base, comprenant :

un module de réception (11), configuré pour recevoir une information de configuration de ressource d'une première station de base, l'information de configuration de ressource de la première station de base incluant une ressource en liaison montante de la première station de base et/ou une ressource en liaison descendante de la première station de base ; et

un module d'envoi (12), configuré pour envoyer un signal de référence à un équipement d'utilisateur (UE), le signal de référence étant utilisé pour donner l'instruction à l'UE d'envoyer un message de demande d'établissement ;

le module de réception (11) étant en outre configuré pour recevoir le message de demande d'établissement une fois que la première station de base a notifié à l'UE que la seconde station de base prend en charge une communication D2D et que l'UE a déterminé, selon une puissance de signal reçue et mesurée du signal de référence, que l'UE satisfait à une condition prédéfinie de réalisation d'une communication D2D avec la seconde station de base, le message de demande d'établissement étant envoyé directement par l'UE à la seconde station de base ou étant envoyé par l'UE à la seconde station de base au moyen de la première station de base, et le message de demande d'établissement étant utilisé pour demander à la seconde station de base d'envoyer l'information de configuration de ressource de la première station de base à l'UE ;

le module d'envoi (12) étant en outre configuré pour envoyer l'information de configuration de ressource de la première station de base à l'UE, l'information de configuration de ressource de la première station de base étant utilisée pour configurer une ressource pour une communication de dispositif à dispositif (D2D) entre l'UE et la seconde station de base ; et

la seconde station de base étant configurée pour réaliser, avec l'UE, une communication D2D, de sorte que la ressource en liaison montante ou la ressource en liaison descendante de la première station de base soit réutilisée.


 
10. Seconde station de base selon la revendication 9, dans laquelle le module d'envoi (12) est en outre configuré pour : avant la réception, par le module de réception (11), de l'information de configuration de ressource de la première station de base, notifier à la première station de base que la seconde station de base prend en charge une communication D2D.
 
11. Seconde station de base selon la revendication 9 ou 10, dans laquelle le module d'envoi (12) est spécifiquement configuré pour envoyer l'information de configuration de ressource de la première station de base à l'UE au moyen de la ressource configurée au moyen de l'information de configuration de ressource de la première station de base.
 
12. Seconde station de base selon l'une quelconque des revendications 9 à 11, dans laquelle le module de réception (11) est spécifiquement configuré pour recevoir un message de demande d'établissement de connexion RRC envoyé par l'UE, le module d'envoi (12) est spécifiquement configuré pour envoyer un message de réponse d'établissement de connexion RRC à l'UE et le message de réponse d'établissement de connexion RRC inclut l'information de configuration de ressource de la première station de base.
 
13. Seconde station de base selon l'une quelconque des revendications 9 à 12, dans laquelle le module de réception (11) est spécifiquement configuré pour recevoir une information d'identification de l'UE envoyée par la première station de base, l'information d'identification de l'UE étant utilisée pour notifier à la seconde station de base que l'UE prend en charge une communication D2D avec la seconde station de base ; et
le module d'envoi (12) est spécifiquement configuré pour envoyer l'information de configuration de ressource de la première station de base à l'UE selon l'information d'identification de l'UE.
 
14. Seconde station de base selon l'une quelconque des revendications 9 à 13, la seconde station de base étant une microstation de base d'un réseau hétérogène et la première station de base étant une macrostation de base du réseau hétérogène connectée logiquement à la microstation de base par une interface X2.
 
15. Équipement d'utilisateur (UE), comprenant un module de réception (31), un module de traitement (32) et un module d'envoi (33),
le module de réception (31) étant configuré pour recevoir un signal de référence envoyé par la seconde station de base, le signal de référence étant utilisé pour donner l'instruction à l'UE d'envoyer un message de demande d'établissement ;
le module de réception (31) étant en outre configuré pour recevoir un premier message envoyé par une première station de base, le premier message étant utilisé pour notifier à l'UE que la seconde station de base prend en charge une communication D2D ;
le module de traitement (32) étant configuré pour mesurer une puissance de signal reçue du signal de référence et déterminer, selon la puissance de signal reçue du signal de référence, que l'UE prend en charge une communication D2D avec la seconde station de base ;
le module d'envoi (33) étant configuré pour envoyer, une fois que le module de traitement a déterminé, selon la puissance de signal reçue du signal de référence, que l'UE prend en charge une communication D2D avec la seconde station de base, un message de demande d'établissement, le message de demande d'établissement étant envoyé directement par l'UE à la seconde station de base ou étant envoyé par l'UE à la seconde station de base au moyen de la première station de base, et le message de demande d'établissement étant utilisé pour demander à la seconde station de base d'envoyer une information de configuration de ressource de la première station de base à l'UE ;
le module de réception (31) étant en outre configuré pour recevoir l'information de configuration de ressource d'une première station de base envoyée par une seconde station de base, l'information de configuration de ressource de la première station de base incluant une ressource en liaison montante de la première station de base et/ou une ressource en liaison descendante de la première station de base ;
le module de traitement (32) étant en outre configuré pour déterminer, selon l'information de configuration de ressource de la première station de base, une ressource de communication requise pour une communication D2D ; et
l'UE étant configuré pour réaliser, avec la seconde station de base, une communication D2D, de sorte que la ressource en liaison montante ou la ressource en liaison descendante de la première station de base soit réutilisée.
 




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