(19)
(11)EP 3 403 462 B1

(12)EUROPEAN PATENT SPECIFICATION

(45)Mention of the grant of the patent:
29.07.2020 Bulletin 2020/31

(21)Application number: 17753418.7

(22)Date of filing:  10.02.2017
(51)International Patent Classification (IPC): 
H04W 74/08(2009.01)
H04W 72/12(2009.01)
H04W 40/04(2009.01)
H04W 16/14(2009.01)
(86)International application number:
PCT/KR2017/001461
(87)International publication number:
WO 2017/142257 (24.08.2017 Gazette  2017/34)

(54)

METHOD AND APPARATUS FOR CHANNEL ACCESS IN WIRELESS COMMUNICATION SYSTEM

VERFAHREN UND VORRICHTUNG FÜR KANALZUGANG IN EINEM DRAHTLOSKOMMUNIKATIONSSYSTEM

PROCÉDÉ ET APPAREIL POUR ACCÈS À UN CANAL DANS UN SYSTÈME DE COMMUNICATION SANS FIL


(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

(30)Priority: 15.02.2016 US 201662295476 P

(43)Date of publication of application:
21.11.2018 Bulletin 2018/47

(73)Proprietor: Samsung Electronics Co., Ltd.
Suwon-si, Gyeonggi-do 16677 (KR)

(72)Inventors:
  • OH, Jinyoung
    Gyeonggi-do, 16677 (KR)
  • BAE, Taehan
    Gyeonggi-do, 16677 (KR)
  • YEO, Jeongho
    Gyeonggi-do, 16677 (KR)

(74)Representative: HGF 
1 City Walk
Leeds LS11 9DX
Leeds LS11 9DX (GB)


(56)References cited: : 
WO-A1-2015/168028
WO-A2-2013/006006
US-A1- 2015 341 962
WO-A1-2016/021945
US-A1- 2014 036 853
  
  • "3rd Generation Partnership Project; Technical Specification Group Radio Access Network; Study on Licensed-Assisted Access to Unlicensed Spectrum; (Release 13)", 3GPP DRAFT; 36889-D00, 3RD GENERATION PARTNERSHIP PROJECT (3GPP), MOBILE COMPETENCE CENTRE ; 650, ROUTE DES LUCIOLES ; F-06921 SOPHIA-ANTIPOLIS CEDEX ; FRANCE , 30 June 2015 (2015-06-30), XP050985895, Retrieved from the Internet: URL:http://www.3gpp.org/ftp/tsg_ran/WG1_RL 1/DRAFT/ [retrieved on 2015-06-30]
  • HUAWEI ET AL: "LBT Functionality and Protocol Impact", 3GPP DRAFT; R2-150248, 3RD GENERATION PARTNERSHIP PROJECT (3GPP), MOBILE COMPETENCE CENTRE ; 650, ROUTE DES LUCIOLES ; F-06921 SOPHIA-ANTIPOLIS CEDEX ; FRANCE , vol. RAN WG2, no. Athens, Greece; 20150209 - 20150212 8 February 2015 (2015-02-08), XP050935574, Retrieved from the Internet: URL:http://www.3gpp.org/ftp/Meetings_3GPP_ SYNC/RAN2/Docs/ [retrieved on 2015-02-08]
  • LG ELECTRONICS: "DL/UL solutions of LAA with LBT", 3GPP DRAFT; R1-150214 LAA LBT PROPOSAL, 3RD GENERATION PARTNERSHIP PROJECT (3GPP), MOBILE COMPETENCE CENTRE ; 650, ROUTE DES LUCIOLES ; F-06921 SOPHIA-ANTIPOLIS CEDEX ; FRANCE , vol. RAN WG1, no. Athens, Greece; 20150209 - 20150213 8 February 2015 (2015-02-08), XP050933428, Retrieved from the Internet: URL:http://www.3gpp.org/ftp/Meetings_3GPP_ SYNC/RAN1/Docs/ [retrieved on 2015-02-08]
  • ERICSSON: "On Remaining Details of DL LAA LBT Procedures and Parameters", 3GPP DRAFT; R1-157257, 3RD GENERATION PARTNERSHIP PROJECT (3GPP), MOBILE COMPETENCE CENTRE ; 650, ROUTE DES LUCIOLES ; F-06921 SOPHIA-ANTIPOLIS CEDEX ; FRANCE , vol. RAN WG1, no. Anaheim, USA; 20151116 - 20151120 15 November 2015 (2015-11-15), XP051003469, Retrieved from the Internet: URL:http://www.3gpp.org/ftp/Meetings_3GPP_ SYNC/RAN1/Docs/ [retrieved on 2015-11-15]
  
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 disclosure relates to a method and apparatus for a channel access in a wireless communication system.

Background Art



[0002] A recent mobile communication system is evolving into a high-speed and high-quality wireless packet data communication system for providing a data service and a multimedia service, outgrowing an initial voice-oriented service. In order to support such a high-speed and high-quality wireless packet data transfer service, various mobile communication standards such as high speed downlink packet access (HSDPA), high speed uplink packet access (HSUPA), long term evolution (LTE), and LTE advanced (LTE-A) of 3rd generation partnership project (3GPP), high rate packet data (HRPD) of 3GPP2, and 802.16 of Institute of Electrical and Electronics Engineers (IEEE) have been developed. In particular, LTE/LTE-A/LTE-A Pro (hereinafter LTE) continues to develop and evolve standards to improve system capacity and frequency efficiency.

[0003] Typically, the LTE system can greatly increase a data transfer rate and system capacity by using carrier aggregation (CA) technology capable of operating the system using a plurality of frequency bands. In addition, the frequency band currently used in the LTE system is generally a licensed band (licensed spectrum or licensed carrier) used by an operator having authority.

[0004] However, since a typical frequency band (e.g., a frequency band of 5GHz or less) that provides a mobile communication service has been already occupied by another operator or another communication system, an operator may often fail to obtain a number of licensed band frequencies and thus have difficulty in expanding the system capacity by using the CA technology.

[0005] The above information is presented as background information only to assist with an understanding of the present disclosure. No determination has been made, and no assertion is made, as to whether any of the above might be applicable as prior art with regard to the present disclosure.

Disclosure of Invention


Technical Problem



[0006] Aspects of the present disclosure are to address at least the above-mentioned problems and/or disadvantages and to provide at least the advantages described below. Accordingly, an aspect of the present disclosure is to provide a method in which a user equipment (UE) transmits an uplink data channel through one or more uplink subframes by using uplink transmission setting information received from an evolved NodeB (eNB).

[0007] However, the present disclosure is not limited to the above aspects, and any other aspect, even though not mentioned herein, may be well understood from the following description.

Solution to Problem



[0008] Another aspect of the present disclosure is to provide a method in which the UE transmits an uplink data channel through one or more uplink subframes by using uplink transmission setting information received from the eNB in case of transmitting the uplink data channel at an unlicensed band.

[0009] Licensed-assisted access to unlicensed spectrum and considerations on regulatory requirements is described in 3GPP TR36.889

[0010] Additionally, an embodiment of the present disclosure includes, if a maximum occupancy time of the eNB or the UE defined at a channel access priority is greater than a time defined by a regional or national regulation in a mobile communication system that operates in an unlicensed band, determining that an unlicensed band channel is an idle channel, through a channel sensing operation performed during a channel sensing duration established according to the channel access priority, occupying the channel during the time defined by the regional or national regulation, and further occupying the channel through an additional channel sensing duration.

[0011] In accordance with an aspect of the present disclosure, a communication method of eNB is provided. The method includes transmitting data to UE through a licensed band, determining whether an unlicensed band channel of an unlicensed band is in an idle state during a first channel sensing duration, and if the unlicensed band channel is in the idle state, transmitting data to the UE through the unlicensed band during a first channel occupying duration, a second channel sensing duration, and a second channel occupying duration. In this method, a sum of the first channel occupying duration, the second channel sensing duration, and the second channel occupying duration may be equal to or less than a certain time.

[0012] In the method, the certain time may be determined, based on a rounding value of a result of a calculation between a maximum occupancy time for the eNB or the UE to occupy the unlicensed band and an actual occupancy time for the eNB or the UE to occupy the unlicensed band.

[0013] In the method, the calculation may include dividing the maximum occupancy time by the actual occupancy time and then subtracting one.

[0014] In the method, the certain time may be determined according to 1000·Tmcot+ceil(Tmcot / Tj-1)·Tjs (µs) in which Tmcot denotes a maximum occupancy time for the eNB or the UE to occupy the unlicensed band, Tj denotes an actual occupancy time for the eNB or the UE to occupy the unlicensed band, and Tjs denotes a length of the second channel sensing duration.

[0015] In the method, the second channel sensing duration may include an idle slot duration having 16 µs and two channel sensing slot durations each having 9 µs.

[0016] In accordance with another aspect of the present disclosure, a communication method of UE is provided. The method includes receiving data from eNB through a licensed band, and if an unlicensed band channel of an unlicensed band is in an idle state during a first channel sensing duration, receiving data from the eNB through the unlicensed band during a first channel occupying duration, a second channel sensing duration, and a second channel occupying duration. In this method, a sum of the first channel occupying duration, the second channel sensing duration, and the second channel occupying duration may be equal to or less than a certain time.

[0017] In accordance with another aspect of the present disclosure, an eNB is provided. The eNB includes a transceiver configured to transmit or receive a signal, and a controller configured to control the transceiver to transmit data to UE through a licensed band, to determine whether an unlicensed band channel of an unlicensed band is in an idle state during a first channel sensing duration, and if the unlicensed band channel is in the idle state, to control the transceiver to transmit data to the UE through the unlicensed band during a first channel occupying duration, a second channel sensing duration, and a second channel occupying duration. In this eNB, a sum of the first channel occupying duration, the second channel sensing duration, and the second channel occupying duration may be equal to or less than a certain time.

[0018] In accordance with another aspect of the present disclosure, a UE is provided. The UE includes a transceiver configured to transmit and/or receive a signal, and a controller configured to control the transceiver to receive data from eNB through a licensed band, and if an unlicensed band channel of an unlicensed band is in an idle state during a first channel sensing duration, to control the transceiver to receive data from the eNB through the unlicensed band during a first channel occupying duration, a second channel sensing duration, and a second channel occupying duration. In this UE, a sum of the first channel occupying duration, the second channel sensing duration, and the second channel occupying duration may be equal to or less than a certain time.

Advantageous Effects of Invention



[0019] According to the present disclosure, it is possible to effectively perform a channel occupancy operation for using an unlicensed band and also improve coexistence performance between devices using the unlicensed band by clearly setting a threshold as to the channel occupancy operation.

[0020] In accordance with another aspect of the present disclosure, a method in which UE transmits an uplink data channel through one or more uplink subframes by using uplink transmission setting information received from eNB is provided.

[0021] Other aspects, advantages, and salient features of the disclosure will become apparent to those skilled in the art from the following detailed description, which, taken in conjunction with the annexed drawings, discloses various embodiments of the present disclosure.

BRIEF DESCRIPTION OF THE DRAWINGS



[0022] The above and other aspects, features, and advantages of certain embodiments of the present disclosure will be more apparent from the following description taken in conjunction with the accompanying drawings, in which:

FIGS. 1 and 2 are diagrams illustrating a communication system according to an embodiment of the present disclosure;

FIG. 3 is a diagram illustrating a channel access scheme in the long term evolution (LTE) standard according to an embodiment of the present disclosure;

FIG. 4 is a diagram illustrating a problem of a channel access scheme in the LTE standard according to an embodiment of the present disclosure;

FIG. 5 is a diagram illustrating a channel access scheme according to an embodiment of the present disclosure;

FIG. 6 is a block diagram illustrating a structure of user equipment (UE) according to an embodiment of the present disclosure; and

FIG. 7 is a block diagram illustrating a structure of evolved NodeB (eNB) according to an embodiment of the present disclosure.



[0023] Throughout the drawings, it should be noted that like reference numbers are used to depict the same or similar elements, features, and structures.

MODE FOR THE INVENTION



[0024] The following description with reference to the accompanying drawings is provided to assist in a comprehensive understanding of various embodiments of the present disclosure as defined by the claims. It includes various specific details to assist in that understanding but these are to be regarded as merely exemplary. Accordingly, those of ordinary skill in the art will recognize that various changes and modifications of the various embodiments described herein can be made without departing from the scope of the present disclosure. In addition, descriptions of well-known functions and configurations may be omitted for clarity and conciseness.

[0025] The terms and words used in the following description and claims are not limited to the bibliographical meanings, but, are merely used by the inventor to enable a clear and consistent understanding of the present disclosure. Accordingly, it should be apparent to those skilled in the art that the following description of various embodiments of the present disclosure is provided for illustration purpose only and not for the purpose of limiting the present disclosure as defined by the appended claims.

[0026] It is to be understood that the singular forms "a," "an," and "the" include plural referents unless the context clearly dictates otherwise. Thus, for example, reference to "a component surface" includes reference to one or more of such surfaces.

[0027] For the same reason, some elements are exaggerated, omitted or schematically shown in the accompanying drawings. Also, the size of each element does not entirely reflect the actual size. In the drawings, the same or corresponding elements are denoted by the same reference numerals.

[0028] The advantages and features of the present disclosure and the manner of achieving them will become apparent with reference to the embodiments described in detail below with reference to the accompanying drawings. The present disclosure may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the present disclosure to those skilled in the art. To fully disclose the scope of the present disclosure to those skilled in the art, and the present disclosure is only defined by the scope of the claims. Like reference numerals refer to like elements throughout the specification.

[0029] It will be understood that each block of the flowchart illustrations, and combinations of blocks in the flowchart illustrations, may be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, or other programmable data processing apparatus to produce a machine, such that the instructions, which are executed via the processor of the computer or other programmable data processing apparatus, generate means for implementing the functions specified in the flowchart block or blocks. These computer program instructions may also be stored in a computer usable or computer-readable memory that may direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer usable or computer-readable memory produce an article of manufacture including instruction means that implement the function specified in the flowchart block or blocks. The computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions that are executed on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart block or blocks.

[0030] And each block of the flowchart illustrations may represent a module, segment, or portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). It should also be noted that in some alternative implementations, the functions noted in the blocks may occur out of the order. For example, two blocks shown in succession may in fact be executed substantially concurrently or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved.

[0031] The term "unit", as used herein, may refer to a software or hardware component or device, such as a field programmable gate array (FPGA) or application specific integrated circuit (ASIC), which performs certain tasks. A unit may be configured to reside on an addressable storage medium and configured to execute on one or more processors. Thus, a module or unit may include, by way of example, components, such as software components, object-oriented software components, class components and task components, processes, functions, attributes, procedures, subroutines, segments of program code, drivers, firmware, microcode, circuitry, data, databases, data structures, tables, arrays, and variables. The functionality provided for in the components and modules/units may be combined into fewer components and modules/units or further separated into additional components and modules.

[0032] Hereinafter, a long term evolution (LTE) system and an LTE-advanced (LTE-A) system are exemplified in the present description, but the present disclosure may be applied to any other communication system using a licensed band (also referred to as a licensed spectrum or a licensed carrier) and an unlicensed band (also referred to as an unlicensed spectrum or an unlicensed carrier) without adding or subtracting.

[0033] In general, the frequency band that is currently used in the LTE system is the licensed band used by an operator having authority. However, since a typical frequency band (e.g., a frequency band of 5GHz or less) that provides a mobile communication service has been already occupied by another operator or another communication system, an operator may often fail to obtain a number of licensed band frequencies and thus have difficulty in expanding the system capacity by using the carrier aggregation (CA) technology.

[0034] Therefore, in order to process rapidly increasing mobile data in an environment where it is difficult to secure a license band frequency as described above, a technique for utilizing an LTE system in an unlicensed band (unlicensed spectrum or unlicensed carrier) has been recently studied (e.g., LTE in unlicensed (LTE-U), licensed-assisted access (LAA)). In particular, since the 5GHz band in the unlicensed band is used by a relatively small number of communication devices in comparison with the 2.4GHz unlicensed band and allows the utilization of a very wide bandwidth, it is relatively easy to acquire an additional frequency band. In other words, using LTE technology that integrates and uses multiple frequency bands, namely, the CA technology, allows the utilization of licensed band and unlicensed band frequencies. In other words, by setting the LTE cell in the licensed band to PCell (or Pcell) and setting the LTE cell (LAA cell or LTE-U cell) in the unlicensed band to SCell (or Scell or LAA SCell) by using the existing CA technology, the LTE system can be operated in the licensed and unlicensed bands. In this case, this system can be applied not only to a CA environment in which an ideal backhaul connects the licensed and unlicensed bands, but also to a dual-connectivity environment in which a non-ideal backhaul connects the licensed and unlicensed bands.

[0035] Normally, the LTE/LTE-A system transmits data using an orthogonal frequency division multiple (OFDM) access transmission scheme. In the OFDM scheme, a modulated signal is located in two-dimensional resources composed of time and frequency. The resources on the time axis are distinguished by different OFDM symbols, which are orthogonal to each other. The resources on the frequency axis are distinguished by different subcarriers, which are also orthogonal to each other. That is, in the OFDM scheme, by designating a specific OFDM symbol on the time axis and designating a specific subcarrier on the frequency axis, a single minimum unit resource referred to as a resource element (RE) can be indicated. Different REs have characteristics orthogonal to each other even though passing through a frequency selective channel, so that signals transmitted in different REs can be received at the receiving side theoretically without mutual interference. In the OFDM-based LTE communication system using a normal CP, a downlink bandwidth consists of a plurality of resource blocks (RBs), and each physical resource block (PRB) may be composed of 12 subcarriers arranged along the frequency axis and 14 or 12 OFDM symbols arranged along the time axis. Here, the PRB is a basic unit of resource allocation.

[0036] A reference signal (RS) received from evolved node B (eNB) is a signal that enables user equipment (UE) to perform channel estimation and, in the LTE communication system, includes a common reference signal (CRS) and a demodulation reference signal (DMRS) as one of dedicated reference signals. The CRS which is a reference signal transmitted over the entire downlink band can be received by all UEs and is used for channel estimation, feedback information configuration of UE, or demodulation of a control channel and a data channel. The DMRS which is also a reference signal transmitted over the entire downlink band is used for channel estimation and data channel demodulation of specific UE and, unlike CRS, is not used for feedback information configuration. Therefore, the DMRS is transmitted through the PRB resource to be scheduled by the UE.

[0037] A subframe on the time axis is composed of two slots of 0.5ms length, i.e., the first slot and the second slot. A physical dedicated control channel (PDCCH) region, which is a control channel region, and an enhanced PDCCH (ePDCCH) region, which is a data channel region, are divided and transmitted on the time axis. This is for quickly receiving and demodulating a control channel signal. In addition, the PDCCH region is located over the entire downlink band, and one control channel is divided into control channels having smaller units and distributed in the entire downlink band. The uplink is divided into a control channel (PUCCH) and a data channel (PUSCH). A response channel and the other feedback information for the downlink data channel are transmitted through the control channel if there is no data channel and to the data channel if there is the data channel.

[0038] FIGS. 1 and 2 are diagrams illustrating a communication system according to an embodiment of the present disclosure.

[0039] Referring to FIGS. 1 and 2, FIG. 1 shows a case where an LTE cell 102 and an LAA cell 103 coexist in a small eNB 101 in the network. UE 104 transmits and receives data to and from the eNB 101 through the LTE cell 102 and the LAA cell 103. There is no restriction on the duplex scheme of the LTE cell 102 or the LAA cell 103. It may be supposed that a cell which performs data transmission/reception operation using a licensed band is the LTE cell 102 or PCell and that a cell which performs data transmission/reception operation using an unlicensed band is the LAA cell 103 or SCell. Although the uplink transmission may be limited to only transmission through the LTE cell 102 when the LTE cell is PCell, the uplink transmission through the LAA cell 103 is also possible.

[0040] FIG. 2 shows an LTE macro eNB 211 for wide coverage and an LAA small eNB 212 for an increase in data transmission installed in the network. In this case, there is no restriction on the duplex scheme of the LTE macro eNB 211 or the LAA small eNB 212. In this case, the LTE macro eNB 211 may be replaced with an LTE small eNB (not shown). In addition, the uplink transmission may be set to be performed only through the LTE macro eNB 211 when the LTE eNB is a PCell. At this time, it may be supposed that the LTE macro eNB 211 and the LAA small eNB 212 have ideal backhaul networks. In this case, faster X2 communication (X2 interface) 213 between eNBs is allowed, so that the LAA small eNB 212 can receive in real time related control information from the LTE macro eNB 211 through the X2 communication 213 even though the uplink transmission is performed only to the LTE macro eNB 211. If there is a non-ideal backhaul network between the LTE macro eNB 211 and the LAA small eNB 212, the uplink transmission of the UE 214 may be allowed through the LAA small eNB 212 because the faster X2 communication 213 is impossible. Proposals of the present disclosure are applicable to both the system of FIG. 1 and the system of FIG. 2. In FIG. 2, the LAA cell 215 and the LTE cell 216 are shown in relation to the UE 214.

[0041] Meanwhile, a channel sensing operation defined as to transmission of a downlink data channel in the current LTE standard will be described as follows, for example.

[0042] FIG. 3 is a diagram illustrating a channel access scheme in the LTE standard according to an embodiment of the present disclosure.

[0043] FIG. 4 is a diagram illustrating a problem of a channel access scheme in the LTE standard according to an embodiment of the present disclosure.

[0044] Referring to FIG. 3, in order to transmit a downlink control channel and a data channel to at least one UE through an unlicensed band channel, a resource access technique such as listen-before-talk (LBT) unlike the existing licensed band should be considered. Namely, the eNB that desires to transmit a downlink control channel and a data channel to at least one UE through an unlicensed band channel may determine whether the channel is in an idle state during at least one defer duration (Td) 310 and N additional channel sensing slots (Tsl) 330. If it is determined that the channel is in an idle state during the at least one defer duration 310 and N additional channel sensing slots 330, the eNB may occupy the unlicensed band channel and transmit the downlink channel 340 and 360.

[0045] In this case, the defer duration 310 and the additional channel sensing slot 330 may be defined differently according to a channel access priority class (p) of the data channel to be transmitted. Namely, the defer duration 310 and the additional channel sensing slot 330 may be defined depending on channel sensing and occupying durations according to the channel access priority class in Table 1 provided below. For example, the defer duration 310 may be formed of an idle slot duration (Tf) 315 and additional mp channel sensing slots 320. In this case, the idle slot duration 315 may have at least 16us in time. Also, each of the channel sensing slots 320 may be defined as at least 9us. For example, when the channel access priority class (p) is 3 in Table 1, the defer duration (Td) 310 which is the sum of the idle slot duration (Tf) 315 and the m p channel sensing slots (mpTsl) 320 may be set to 43 µs (i.e., 16µs (Tf)+39µs (mpTsl)).

[0046] The number (N) of the additional channel sensing slots 330 is a value uniformly and randomly selected within a contention window size (CWp) with respect to the channel access priority (p) in Table 1. Namely, N is a value arbitrarily selected between 0 and the contention window size (CWp). At this time, the contention window size (CWp) may be equal to or greater than the minimum contention window size (CWmin,p) and equal to or smaller than the maximum contention window size (CWmax,p) (namely, CW min,p ≤ CWp ≤ CWmax,p). For example, when the channel access priority class (p) is 3, the contention window size (CWp) is selected between the minimum contention window size (CWmin,p), 15, and the maximum contention window size (CWmax,p), 63, and may be one of 15, 31 and 63.

Table 1



[0047] 
[Table 1]
Channel Access Priority Class (p)mpCWmin,pCWmax,pTm cot, pallowed CWp sizes
1 1 3 7 2 ms {3,7}
2 1 7 15 3 ms {7,15}
3 3 15 63 8 or 10 ms {15,31,63}
4 7 15 1023 8 or 10 ms {15,31,63,127,255, 511,1023}


[0048] If the size of a signal received during the channel sensing duration 335 formed of the at least one defer duration 310 and the N additional channel sensing slots 330 does not exceed an energy detection threshold (Xthresh), e.g., -62dBm, the eNB may determine that the channel is in an idle state. Then the eNB may transmit a downlink control channel and a data channel to the UE through the channel 340 and 360 determined as being in an idle state. At this time, the threshold used for determining, depending on the size of a received signal, that the unlicensed band channel is an idle channel may be set differently using one or more of the type of a signal/channel to be transmitted, a bandwidth for transmission, and transmission power. For example, in case of low transmission power, the energy detection threshold which is relatively higher than in case of high transmission power may be applied to determine an idle state of the unlicensed band channel. If the size of a signal received by the eNB during the channel sensing duration 335 which is set according to the channel access priority class does not exceed the above threshold (Xthresh), the eNB may continuously occupy and use the unlicensed band channel 340, 360 determined as an idle state during the maximum channel occupancy duration or time (Tmcot or Tmcot,p) which is set according to the channel access priority class (p). For example, if the eNB determines that the unlicensed band is in an idle state during the channel sensing duration 335 as to the channel access priority class (p) 3 in Table 1, the eNB may continuously occupy the channel without any channel sensing operation for 8ms maximally.

[0049] In the above embodiment of the present disclosure, the maximum occupancy time (T mcot,p) may be set differently according to frequency bands or regionally or nationally defined regulations. For example, in case of Japan, the maximum occupancy time (Tj) in the unlicensed band of 5GHz band is currently regulated to 4ms. On the other hand, in case of Europe, it is possible to continuously occupy and use the channel up to 10ms or 13ms. Therefore, if the maximum occupancy time (Tmcot,p) of the eNB or UE like the channel access priority class (p) 3 in Table 1 is greater than the time defined by the regulations, the eNB or UE cannot use the channel during the maximum occupancy time (Tmcot,p) defined at the channel access priority class. Accordingly, channel sensing and accessing operations defined in the current LTE standard in order to solve the above problem may be as follows (for example, in view of the eNB, the case of Japan, and the channel access priority class 3).

[0050] According to the channel access priority class (p) 3, the defer duration (Td) 310 may be formed of at least 16 µs time and three channel sensing slots 320. Also, the number (N) of additional channel sensing slots 330 is randomly selected from one of the contention window sizes {15, 31, 63} allowed in the channel access priority class (p) 3. In this case, the contention window size (CWp) used for determining the number of additional channel sensing slots 330 may be selected as one of the allowed contention window sizes {15, 31, 63} (allowed CWp sizes) in the channel access priority class (p) 3, depending on the result hybrid automatic repeat request - acknowledgement (HARQ-ACK) or hybrid automatic repeat request - negative acknowledgement (HARQ-NACK)) of reception of a data channel from the eNB or UE. Namely, if the size of a signal received during the channel sensing duration 335 formed of the defer duration 310 set according to the channel access priority class (p) 3 and the N additional channel sensing slots 330 does not exceed the energy detection threshold (X thresh), e.g., -62dBm, the eNB that desires to transmit a downlink control channel and a data channel to at least one UE through an unlicensed band channel may determine that the channel is in an idle state. Then the eNB may transmit a downlink control channel and a data channel through the channel determined as being in an idle state without any channel sensing operation for a time (Tj=4ms for Japan) defined according to a region or nation.

[0051] In this case, if the maximum occupancy time (Tmcot,p=8ms or Tmcot,p=10ms) of the eNB or UE defined in the channel access priority class (p) (i.e., the maximum occupancy time which allows the eNB or the UE to maximally occupy an unlicensed band) is greater than the time (Tj=4ms) defined by the regional or national regulation (i.e., an actual occupancy time which allows the eNB or the UE to actually occupy an unlicensed band), the eNB may perform channel transmission during the time 340 (Tj =4ms) defined by the regional or national regulation. Then the eNB may perform again a channel sensing operation in the additional channel sensing duration 350 (Tjs = 34 µs). If the size of a signal received during the channel sensing duration 350 does not exceed the energy detection threshold (Xthresh), e.g., -62dBm, the eNB may determine that the channel is in an idle state. Also, the eNB may further occupy the channel during the additional channel occupying time 360. In this case, after the unlicensed band channel is determined as an idle channel in the channel sensing duration 335 according to the channel access priority class (p), the sum of the initial channel occupancy time 340, the additional channel sensing duration 350 and the additional channel occupancy time 360 cannot exceed 1000·Tmcot+floor(Tmcot/Tj)·Tjs (µs).

[0052] According to the scheme, defined in the LTE standard, if the maximum occupancy time (Tmcot,p) of the eNB or UE defined in the channel access priority class (p) is 8ms (Tmcot,p=8ms) and if the maximum occupancy time (Tmcot,p) is greater than the time (Tj =4ms) defined by the regional or national regulation, the sum of the initial channel occupancy time 340, the additional channel sensing duration 350 and the additional channel occupancy time 360 after the unlicensed band channel is determined as an idle channel in the channel sensing duration 335 according to the channel access priority class (p) becomes 1000·Tmcot+floor(Tmcot/Tj)·Tjs=8ms+68 µs Namely, the sum of the initial channel occupancy time 340, the additional channel sensing duration 350 and the additional channel occupancy time 360 is 1000·Tmcot+floor(Tmcot/Tj)·Tjs, which is obtained as 10008 (µs) + floor(8/4)34 (µs) namely, 8000+234 (µs). Therefore, the additional channel sensing duration (Tjs) has two sections each having the length of 34 µs or has one section having the length of 68 µs.

[0053] In other words, according to the scheme, defined in the LTE standard, if the maximum occupancy time (Tmcot,p=8ms or Tmcot,p=10ms) of the eNB or UE is greater than the time (Tj=4ms) defined by the regional or national regulation, the eNB performs channel transmission during the time 340 (Tj=4ms) defined by the regional or national regulation and performs again a channel sensing operation during the additional channel sensing duration (Tjs) having the length of 34µs. In addition, if the maximum occupancy time (Tmcot,p) of the eNB or UE is 8ms and if the time (Tj) defined by the regional or national regulation is 4ms or the like, the eNB performs again the channel sensing operation during two additional channel sensing durations (Tjs) each having the length of 34µs or one additional channel sensing duration (Tjs) having the length of 68µs.

[0054] Referring to FIG. 4, according to the currently defined LTE standard, even though it is determined that the channel is not an idle channel in the first additional channel sensing duration 450 after the initial channel occupancy time 440 as shown in FIG. 4, the eNB may further perform a channel sensing operation through the second additional channel sensing duration 455. The defer duration 410 may be formed of an idle slot duration (Tf) 415 and additional mp channel sensing slots 420, as illustrated in FIG. 4.

[0055] Namely, if the size of a signal received during the channel sensing duration 435 including the defer duration 410 and the N additional channel sensing slots 430 is equal to or smaller than a predetermined threshold such as an energy detection threshold (Xthresh), the eNB may determine that the channel is in an idle state. Then the eNB may transmit a downlink control channel and a data channel to the UE through the channel determined as being in an idle state. The transmission time may be possible up to the maximum occupancy time (Tmcot,p) of the eNB or UE defined in the channel access priority class (p). However, if the maximum occupancy time (Tmcot,p) of the eNB or UE defined in the channel access priority class (p) is greater than the time (Tj) defined by the regional or national regulation, the eNB may occupy and use the channel during the initial channel occupancy time 440 which corresponds to the time (Tj) defined by the regional or national regulation. Also, the eNB may perform again a channel sensing operation during the additional channel sensing durations 450 and 455 and, if the size of a signal received during the additional channel sensing durations 450 and 455 is equal to or smaller than the threshold (Xthresh), determine that the channel is in an idle state. Then the eNB may occupy and use the channel during the additional channel occupancy time 460. In this case, if it is defined that the sum of the initial channel occupancy time 440, the additional channel sensing durations 450 and 455 and the additional channel occupancy time 460 cannot exceed 1000·Tmcot+floor(Tmcot/Tj)·Tjs (µs), the additional channel sensing duration (Tjs) may include two sections 450 and 455 each of which has the length of 34µs as discussed above. Thus, even though the first additional channel sensing duration 450 after the initial channel occupancy time 440 is not an idle channel, the eNB may further perform the channel sensing operation through the second additional channel sensing duration 455.

[0056] FIG. 5 is a diagram illustrating a channel access scheme according to an embodiment of the present disclosure.

[0057] Referring to FIG. 5, in order to solve the above problem in an embodiment of the present disclosure, if the maximum occupancy time (Tmcot,p) of the eNB or UE defined in the channel access priority class (p) is greater than the time (Tj) defined by the regional or national regulation, the eNB determines that the unlicensed band channel is an idle channel, through a channel sensing operation performed during the channel sensing duration 535 set according to the channel access priority class (p), and then defines that the sum of the initial channel occupancy time 540, the additional channel sensing duration 550 (Tjs) and the additional channel occupancy time 560 cannot exceed 1000·Tmcot+(ceil(Tmcot/Tj)-1)·Tjs (µs) or 1000·Tmcot+ceil(Tmcot/Tj-1)·Tjs (µs)

[0058] Specifically, the eNB that desires to transmit a downlink control channel and a data channel to at least one UE through the unlicensed band channel, or the UE that desires to transmit an uplink control channel or a data channel to eNB through the unlicensed band channel, establishes the channel access priority class (p) defined according to the control channel or data channel to be transmitted (or according to the type of information to be sent, e.g., VoIP, FTP, or the like).

[0059] Also, if the size of a signal received from the eNB or UE during the channel sensing duration 535 formed of the defer duration 510 defined according to the channel access priority class (p) and the N additional channel sensing slots 530 selected randomly in the contention window defined according to the channel access priority class (p) does not exceed the energy detection threshold (Xthresh), e.g., -62dBm or -72dBm, the eNB or UE may determine that the channel is in an idle state. At this time, the defer duration 510 may include the idle slot duration 515 having the length of, for example, 16µs and mp channel sensing slots 520. Each of the channel sensing slots 520 may have the length of, for example, 9µs.

[0060] Also, the eNB or UE may occupy the unlicensed band channel and transmit a downlink signal or an uplink signal to the UE or eNB. In this case, the eNB or UE may continuously occupy the unlicensed band and transmit a signal during the minimum time between the maximum channel occupancy time (Tmcot,p) defined according to the channel access priority class and the time (Tj=4ms for Japan) defined according to regions or nations as to the unlicensed band.

[0061] If the maximum occupancy time (Tmcot,p=8ms or Tmcot,p=10ms) of the eNB or UE defined in the channel access priority class (p) is greater than the time (Tj=4ms) defined by the regional or national regulation, the eNB may occupy the channel and transmit a signal during the time 540 (Tj=4ms) defined by the regional or national regulation. Then, after the initial channel occupancy time 540 (or the first channel occupancy time) corresponding to the time 540 (Tj=4ms) defined by the regional or national regulation, the eNB or UE may perform again a channel sensing operation in the additional channel sensing duration 550 (Tjs = 34µs) If the size of a signal received during the channel sensing duration 550 does not exceed the energy detection threshold (Xthresh), e.g., -62dBm or -72dBm, the eNB may determine that the channel is in an idle state, and further occupy the channel.

[0062] In this case, after the unlicensed band channel is determined as an idle channel in the channel sensing duration 535 according to the channel access priority class (p), the sum of the initial channel occupancy time 540, the additional channel sensing duration 550 and the additional channel occupancy time 560 is defined so as not to exceed 1000·Tmcot+(ceil(Tmcot/Tj)-1)·Tjs (µs) or 1000·Tmcot+ceil(Tmcot/Tj-1)·Tjs (µs). In this case, if the maximum occupancy time (Tmcot,p) of the eNB or UE defined in the channel access priority class (p) is 8ms (Tmcot,p=8ms) and if the maximum occupancy time (Tmcot,p) is greater than the time (Tj=4ms) defined by the regional or national regulation, the sum of the initial channel occupancy time 540, the additional channel sensing duration 550 and the additional channel occupancy time 560 after the unlicensed band channel is determined as an idle channel in the channel sensing duration 535 according to the channel access priority class (p) becomes 1000·Tmcot+ceil(Tmcot/Tj-1)·Tjs, which is obtained as 10008 (µs) + ceil(8/4-1)34 (µs) namely, 8000+34 (µs).

[0063] In this case, the additional channel sensing duration 550 may apply at least one method between a channel sensing operation in the same way as a mp value is 2 in defer duration (Td) 510 of FIG. 5 and a channel sensing operation in one continuous duration such as the additional channel sensing duration 350 of FIG. 3. For example, the additional channel sensing duration 550 may include the idle slot duration 555 having the length of 16 µs and the two channel sensing slots 557 (2*9 µs).

[0064] If the maximum channel occupancy time (Tmcot,p) defined according to the channel access priority class (p) is 10ms, it is possible to maximally utilize the maximum channel occupancy time, 10ms, defined according to the channel access priority class (p) through two channel sensing durations 535 and 550 and two channel occupancies, the initial channel occupancy time 540 and the additional channel occupancy time 560 by applying the above method.

[0065] FIG. 6 is a block diagram illustrating a structure of UE according to an embodiment of the present disclosure.

[0066] Referring to FIG. 6, the UE according to an embodiment of the present disclosure may include a transceiver 610 and a controller 620.

[0067] The transceiver 610 may transmit and/or receive a signal to or from other network entities.

[0068] The controller 620 may control the UE to perform operations discussed in the above embodiments. For example, the controller 620 may control the transceiver 610 to receive data from eNB through a licensed band, and if an unlicensed band channel is in an idle state during a first channel sensing duration, to control the transceiver 610 to receive data from the eNB through an unlicensed band during a first channel occupying duration, a second channel sensing duration, and a second channel occupying duration.

[0069] Meanwhile, the controller 620 and the transceiver 610 are not necessarily implemented as separate devices, but may be implemented as a single unit in the form of a single chip. In addition, the controller 620 and the transceiver 610 may be electrically connected to each other.

[0070] Additionally, for example, the controller 620 may be a circuit, an application-specific circuit, or at least one processor. In addition, the operations of the UE may be realized by providing a memory unit for storing a corresponding program code to the UE. That is, the controller 620 may execute the above-described operations by reading and executing the program code stored in the memory unit by a processor or a central processing unit (CPU).

[0071] FIG. 7 is a block diagram illustrating a structure of eNB according to an embodiment of the present disclosure.

[0072] Referring to FIG. 7, the eNB according to an embodiment of the present disclosure may include a transceiver 710 and a controller 720 (at least one processor).

[0073] The transceiver 710 may transmit and/or receive a signal to or from other network entities.

[0074] The controller 720 may control the eNB to perform operations discussed in the above embodiments. For example, the controller 720 may control the transceiver 710 to transmit data to UE through a licensed band, to determine whether an unlicensed band channel is in an idle state during a first channel sensing duration, and if the unlicensed band channel is in the idle state, to control the transceiver 710 to transmit data to the UE through an unlicensed band during a first channel occupying duration, a second channel sensing duration, and a second channel occupying duration.

[0075] Meanwhile, the controller 720 and the transceiver 710 are not necessarily implemented as separate devices, but may be implemented as a single unit in the form of a single chip. In addition, the controller 720 and the transceiver 710 may be electrically connected to each other.

[0076] Additionally, for example, the controller 720 may be a circuit, an application-specific circuit, or at least one processor. In addition, the operations of the eNB may be realized by providing a memory unit for storing a corresponding program code to the eNB. That is, the controller 720 may execute the above-described operations by reading and executing the program code stored in the memory unit by a processor or a central processing unit (CPU).

[0077] The various elements, modules, etc. of entities, such as eNB or UE, disclosed herein may be implemented in a hardware circuit, e.g., a complementary metal oxide semiconductor based logic circuit, firmware, software, and/or a combination thereof embedded in a machine-readable medium. In one example, the various electrical structures and methods may be implemented using electrical circuits such as transistors, logic gates, and custom semiconductors.

[0078] While the present disclosure has been shown and described with reference to various embodiments thereof, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the scope of the present disclosure as defined by the appended claims.


Claims

1. A method for communication of a base station (101, 211, 212), the method comprising:

determining whether an unlicensed band channel of an unlicensed band is in an idle state during a first channel sensing duration (335, 435, 535);

transmitting data to a terminal (104, 214) through the unlicensed band during a first channel occupying duration (340, 440, 540), in case that the unlicensed band channel of the unlicensed band is in the idle state during the first channel sensing duration;

determining, when the first channel occupying duration is less than a maximum occupancy time (Tmcot, Tmcot,p) possible for the base station or the terminal to continuously occupy the unlicensed band and the first channel occupying duration is equal to an actual occupancy time (Tj) allowed for the base station or the terminal to continuously occupy the unlicensed band, whether the unlicensed band channel of the unlicensed band is in an idle state during a second channel sensing duration (350, 450, 550); and

transmitting the data to the terminal through the unlicensed band during a second channel occupying duration (360, 460, 560), in case that the unlicensed band channel of the unlicensed band is in the idle state during the second channel sensing duration,

wherein a sum of the first channel occupying duration, the second channel sensing duration, and the second channel occupying duration is equal to or less than a certain time determined based on a rounding up value of a result of a calculation between the maximum occupancy time and the actual occupancy time.


 
2. The method of claim 1,
wherein the calculation includes dividing the maximum occupancy time by the actual occupancy time and then subtracting one.
 
3. The method of claim 1, wherein the certain time is determined according to 1000·Tmcot+ceil(Tmcot/Tj-1)·Tjs µs,
wherein Tmcot denotes the maximum occupancy time possible for the base station or the terminal to continuously occupy the unlicensed band,
wherein Tj denotes the actual occupancy time allowed for the base station or the terminal to continuously occupy the unlicensed band, and
wherein Tjs denotes a length of the second channel sensing duration.
 
4. The method of claim 1, wherein the second channel sensing duration (550) includes:

an idle slot duration (555) includes 16 µs, and

two channel sensing slot durations (557) each includes 9 µs.


 
5. A method for communication of a terminal (104, 214), the method comprising:

receiving data from a base station (101, 211, 212) through an unlicensed band during a first channel occupying duration (340, 440, 540), in case that an unlicensed band channel of the unlicensed band is in an idle state during a first channel sensing duration (335, 435, 535); and

receiving, when the first channel occupying duration is less than a maximum occupancy time (Tmcot, Tmcot,p) possible for the base station or the terminal to continuously occupy the unlicensed band and the first channel occupying duration is equal to an actual occupancy time (Tj) allowed for the base station or the terminal to continuously occupy the unlicensed band, the data from the base station through the unlicensed band during a second channel occupying duration (360, 460, 560), in case that the unlicensed band channel of the unlicensed band is in an idle state during a second channel sensing duration (350, 450, 550),

wherein a sum of the first channel occupying duration, the second channel sensing duration, and the second channel occupying duration is equal to or less than a certain time determined based on a rounding up value of a result of a calculation between the maximum occupancy time and the actual occupancy time.


 
6. The method of claim 5,
wherein the calculation includes dividing the maximum occupancy time by the actual occupancy time and then subtracting one.
 
7. The method of claim 5, wherein the certain time is determined according to 1000·Tmcot+ceil(Tmcot/Tj-1)·Tjs µs,
wherein Tmcot denotes the maximum occupancy time possible for the base station or the terminal to continuously occupy the unlicensed band,
wherein Tj denotes the actual occupancy time allowed for the base station or the terminal to continuously occupy the unlicensed band,
wherein Tjs denotes a length of the second channel sensing duration, and
wherein the second channel sensing duration includes:

an idle slot duration includes 16 µs, and

two channel sensing slot durations each includes 9 µs.


 
8. A base station (101, 211, 212) comprising:

a transceiver (610, 710) configured to transmit or receive a signal; and

a controller (620, 720) configured to:

determine whether an unlicensed band channel of an unlicensed band is in an idle state during a first channel sensing duration (335, 435, 535),

control the transceiver to transmit data to a terminal (104, 214) through the unlicensed band during a first channel occupying duration (340, 440, 540), in case that the unlicensed band channel of the unlicensed band is in the idle state during the first channel sensing duration,

determine, when the first channel occupying duration is less than a maximum occupancy time (Tmcot, Tmcot,p) possible for the base station or the terminal to continuously occupy the unlicensed band and the first channel occupying duration is equal to an actual occupancy time (Tj) allowed for the base station or the terminal to continuously occupy the unlicensed band, whether the unlicensed band channel of the unlicensed band is in an idle state during a second channel sensing duration (350, 450, 550), and

control the transceiver to transmit the data to the terminal through the unlicensed band during a second channel occupying duration (360, 460, 560), in case that the unlicensed band channel of the unlicensed band is in the idle state during the second channel sensing duration,

wherein a sum of the first channel occupying duration, the second channel sensing duration, and the second channel occupying duration is equal to or less than a certain time determined based on a rounding up value of a result of a calculation between the maximum occupancy time and the actual occupancy time.


 
9. The base station of claim 8,
wherein the calculation includes dividing the maximum occupancy time by the actual occupancy time and then subtracting one.
 
10. The base station of claim 8, wherein the certain time is determined according to 1000·Tmcot+ceil(Tmcot/Tj-1)·Tjs µs,
wherein Tmcot denotes the maximum occupancy time possible for the base station or the terminal to continuously occupy the unlicensed band,
wherein Tj denotes the actual occupancy time allowed for the base station or the terminal to continuously occupy the unlicensed band, and
wherein Tjs denotes a length of the second channel sensing duration.
 
11. The base station of claim 8, wherein the second channel sensing duration includes:

an idle slot duration includes 16 µs, and

two channel sensing slot durations each includes 9 µs.


 
12. A terminal (104, 214) comprising:

a transceiver configured to transmit and/or receive a signal; and

a controller (720) configured to:

control the transceiver to receive data from a base station (101, 211, 212) through an unlicensed band during a first channel occupying duration (340, 440, 540), in case that an unlicensed band channel of the unlicensed band is in an idle state during a first channel sensing duration (335, 435, 535),

control the transceiver to receive, when the first channel occupying duration is less than a maximum occupancy time (Tmcot, Tmcot,p) possible for the base station or the terminal to continuously occupy the unlicensed band and the first channel occupying duration is equal to an actual occupancy time (Tj) allowed for the base station or the terminal to continuously occupy the unlicensed band, the data from the base station through the unlicensed band during a second channel occupying duration (360, 460, 560), in case that the unlicensed band channel of the unlicensed band is in an idle state during a second channel sensing duration (350, 450, 550),

wherein a sum of the first channel occupying duration, the second channel sensing duration, and the second channel occupying duration is equal to or less than a certain time determined based on a rounding up value of a result of a calculation between the maximum occupancy time and the actual occupancy time.


 
13. The terminal of claim 12,
wherein the calculation includes dividing the maximum occupancy time by the actual occupancy time and then subtracting one.
 
14. The terminal of claim 12, wherein the certain time is determined according to 1000·Tmcot+ceil(Tmcot/Tj-1)·Tjs µs,
wherein Tmcot denotes the maximum occupancy time possible for the base station or the terminal to continuously occupy the unlicensed band,
wherein Tj denotes the actual occupancy time allowed for the base station or the terminal to continuously occupy the unlicensed band, and
wherein Tjs denotes a length of the second channel sensing duration.
 
15. The terminal of claim 12, wherein the second channel sensing duration includes:

an idle slot duration includes 16 µs, and

two channel sensing slot durations each includes 9 µs.


 


Ansprüche

1. Verfahren zum Betreiben einer Basisstation (101, 211, 212), das Verfahren umfassend:

Bestimmen, ob ein nicht lizenzierter Bandkanal eines nicht lizenzierten Bands während einer ersten Kanalabtastdauer (335, 435, 535) in einem Ruhezustand ist;

Senden von Daten an ein Endgerät (104, 214) über das nicht lizenzierte Band während einer ersten Kanalbelegungsdauer (340, 440, 540), in einem Fall, dass sich der nicht lizenzierte Bandkanal des nicht lizenzierten Bands während der ersten Kanalabtastdauer in dem Ruhezustand ist;

Bestimmen, wenn die Belegungsdauer des ersten Kanals kürzer ist als eine maximale Belegungszeit (Tmcot, Tmcot,p), die für die Basisstation oder das Endgerät möglich ist, um das nicht lizenzierte Band kontinuierlich zu belegen, und die Belegungsdauer des ersten Kanals gleich einer tatsächlichen Belegungszeit (Tj) ist, die der Basisstation oder dem Endgerät erlaubt ist, um das nicht lizenzierte Band zu belegen, ob der nicht lizenzierte Bandkanal des nicht lizenzierten Bands während einer zweiten Kanalabtastdauer (350, 450, 550) in einem Ruhezustand ist; und

Senden der Daten an das Endgerät über das nicht lizenzierte Band während einer zweiten Kanalbelegungsdauer (360, 460, 560), in einem Fall, dass der nicht lizenzierten Bandkanal des nicht lizenzierten Bands während der zweiten Kanalabtastdauer in dem Ruhezustand ist,

wobei eine Summe der Belegungsdauer des ersten Kanals, der Erfassungsdauer des zweiten Kanals und der Belegungsdauer des zweiten Kanals gleich wie oder kleiner als eine gewisse Zeit ist, die basierend auf einem Aufrundungswert eines Resultats einer Berechnung zwischen der maximalen Belegungszeit und der tatsächlichen Belegungszeit bestimmt wird.


 
2. Verfahren nach Anspruch 1,
wobei die Berechnung ein Dividieren der maximalen Belegungszeit durch die tatsächliche Belegungszeit und dann ein Subtrahieren von eins beinhaltet.
 
3. Verfahren nach Anspruch 1, wobei die gewisse Zeit gemäß 1000·Tmcot+aufrund(Tmcot/Tj-1)·Tjs µs bestimmt wird,
wobei Tmcot die maximale Belegungszeit bezeichnet, die der Basisstation oder dem Endgerät möglich ist, um das nicht lizenzierte Band kontinuierlich zu belegen,
wobei Tj die tatsächliche Belegungszeit bezeichnet, die der Basisstation oder dem Endgerät erlaubt ist, um das nicht lizenzierte Band kontinuierlich zu belegen, und
wobei Tjs eine Länge der Erfassungsdauer des zweiten Kanals bezeichnet.
 
4. Verfahren nach Anspruch 1, wobei die Erfassungsdauer des zweiten Kanals (550) Folgendes beinhaltet:

eine Ruhezeitdauer beinhaltet (555) 16 µs, und

zwei Kanalabtastzeitdauern beinhalten (557) jeweils 9 µs.


 
5. Kommunikationsverfahren eines Endgeräts (104, 214), das Verfahren umfassend:

Empfangen von Daten von einer Basisstation (101, 211, 212) über ein nicht lizenziertes Band während einer ersten Kanalbelegungsdauer (340, 440, 540), in einem Fall, dass ein nicht lizenzierter Bandkanal des nicht lizenzierten Bands während einer ersten Kanalabtastdauer (335, 435, 535) in einem Ruhezustand ist;

Empfangen, wenn die Belegungsdauer des ersten Kanals kürzer ist als eine maximale Belegungszeit (Tmcot, Tmcot,p), die für die Basisstation oder das Endgerät möglich ist, um das nicht lizenzierte Band kontinuierlich zu belegen, und die Belegungsdauer des ersten Kanals gleich einer tatsächlichen Belegungszeit (Tj) ist, die der Basisstation oder dem Endgerät erlaubt ist, um das nicht lizenzierte Band zu belegen, der Daten von der Basisstation durch das nicht lizenzierte Band während einer zweiten Kanalbelegungsdauer (360, 460, 560), in einem Fall, dass der nicht lizenzierte Bandkanal des nicht lizenzierten Bands während einer zweiten Kanalabtastdauer (350, 450, 550) in einem Ruhezustand ist; und

wobei eine Summe der Belegungsdauer des ersten Kanals, der Erfassungsdauer des zweiten Kanals und der Belegungsdauer des zweiten Kanals gleich wie oder kleiner als eine gewisse Zeit ist, die basierend auf einem Aufrundungswert eines Resultats einer Berechnung zwischen der maximalen Belegungszeit und der tatsächlichen Belegungszeit bestimmt wird.


 
6. Verfahren nach Anspruch 5,
wobei die Berechnung ein Dividieren der maximalen Belegungszeit durch die tatsächliche Belegungszeit und dann ein Subtrahieren von eins beinhaltet.
 
7. Verfahren nach Anspruch 5, wobei die gewisse Zeit gemäß 1000·Tmcot+aufrund(Tmcot/Tj-1)·Tjs µs bestimmt wird,
wobei Tmcot die maximale Belegungszeit bezeichnet, die der Basisstation oder dem Endgerät möglich ist, um das nicht lizenzierte Band kontinuierlich zu belegen,
wobei Tj die tatsächliche Belegungszeit bezeichnet, die der Basisstation oder dem Endgerät erlaubt ist, um das nicht lizenzierte Band kontinuierlich zu belegen,
wobei Tjs eine Länge der Erfassungsdauer des zweiten Kanals bezeichnet, und
wobei die Erfassungsdauer des zweiten Kanals Folgendes beinhaltet:

eine Ruhezeitdauer beinhaltet 16 µs, und

zwei Kanalabtastzeitdauern beinhalten jeweils 9 µs.


 
8. Basisstation (101, 211, 212), umfassend:

einen Sendeempfänger (610, 710), der konfiguriert ist, um ein Signal zu senden oder zu empfangen; und

eine Steuerung (620, 720), die zu Folgendem konfiguriert ist:

Bestimmen, ob ein Kanal eines nicht lizenzierten Bands eines nicht lizenzierten Bands während einer ersten Kanalabtastdauer (335, 435, 535) in einem Ruhezustand ist;

Steuern des Sendeempfängers, um in einem Fall, dass der nicht lizenzierte Bandkanal des nicht lizenzierten Bands während der ersten Kanalabtastdauer in dem Ruhezustand ist, während einer ersten Kanalbelegungsdauer (340, 440, 540) Daten über das nicht lizenzierte Band an ein Endgerät (104, 214) zu senden;

Bestimmen, wenn die Belegungsdauer des ersten Kanals kürzer ist als eine maximale Belegungszeit (Tmcot, Tmcot,p), die für die Basisstation oder das Endgerät möglich ist, um das nicht lizenzierte Band kontinuierlich zu belegen, und die Belegungsdauer des ersten Kanals gleich einer tatsächlichen Belegungszeit (Tj) ist, die der Basisstation oder dem Endgerät erlaubt ist, um das nicht lizenzierte Band zu belegen, ob der nicht lizenzierte Bandkanal des nicht lizenzierten Bands während einer zweiten Kanalabtastdauer (350, 450, 550) in einem Ruhezustand ist; und

Steuern des Sendeempfängers, um in einem Fall, dass der nicht lizenzierten Bandkanal des nicht lizenzierten Bands während der zweiten Kanalabtastdauer in dem Ruhezustand ist, während einer zweiten Kanalbelegungsdauer (360, 460, 560) Daten über das nicht lizenzierte Band an das Endgerät zu senden,

wobei eine Summe der Belegungsdauer des ersten Kanals, der Erfassungsdauer des zweiten Kanals und der Belegungsdauer des zweiten Kanals gleich wie oder kleiner als eine gewisse Zeit ist, die basierend auf einem Aufrundungswert eines Resultats einer Berechnung zwischen der maximalen Belegungszeit und der tatsächlichen Belegungszeit bestimmt wird.


 
9. Basisstation nach Anspruch 8,
wobei die Berechnung ein Dividieren der maximalen Belegungszeit durch die tatsächliche Belegungszeit und dann ein Subtrahieren von eins beinhaltet.
 
10. Basisstation nach Anspruch 8, wobei die gewisse Zeit gemäß 1000·Tmcot+aufrund(Tmcot/Tj-1)·Tjs µs bestimmt wird,
wobei Tmcot die maximale Belegungszeit bezeichnet, die der Basisstation oder dem Endgerät möglich ist, um das nicht lizenzierte Band kontinuierlich zu belegen,
wobei Tj die tatsächliche Belegungszeit bezeichnet, die der Basisstation oder dem Endgerät erlaubt ist, um das nicht lizenzierte Band kontinuierlich zu belegen, und
wobei Tjs eine Länge der Erfassungsdauer des zweiten Kanals bezeichnet.
 
11. Basisstation nach Anspruch 8, wobei die Erfassungsdauer des zweiten Kanals Folgendes beinhaltet:

eine Ruhezeitdauer beinhaltet 16 µs, und

zwei Kanalabtastzeitdauern beinhalten jeweils 9 µs.


 
12. Endgerät (104, 214), umfassend:

einen Transceiver, der konfiguriert ist, um ein Signal zu senden und/oder zu empfangen; und

eine Steuerung (720), die zu Folgendem konfiguriert ist:

Steuern des Sendeempfängers, um in einem Fall, dass ein nicht lizenzierter Bandkanal des nicht lizenzierten Bands während einer ersten Kanalabtastdauer (335, 435, 535) in einem Ruhezustand ist, während einer ersten Kanalbelegungsdauer (340, 440, 540) Daten über ein nicht lizenziertes Band Daten von einer Basisstation (101, 211, 212) zu empfangen;

Steuern des Sendeempfängers, um, wenn die Belegungsdauer des ersten Kanals kürzer ist als eine maximale Belegungszeit (Tmcot, Tmcot,p), die für die Basisstation oder das Endgerät möglich ist, um das nicht lizenzierte Band kontinuierlich zu belegen, und die Belegungsdauer des ersten Kanals gleich einer tatsächlichen Belegungszeit (Tj) ist, die der Basisstation oder dem Endgerät erlaubt ist, um das nicht lizenzierte Band zu belegen, Daten von der Basisstation durch das nicht lizenzierte Band während einer zweiten Kanalbelegungsdauer (360, 460, 560) zu empfangen, in einem Fall, dass der nicht lizenzierte Bandkanal des nicht lizenzierten Bands während einer zweiten Kanalabtastdauer (350, 450, 550) in einem Ruhezustand ist; und

wobei eine Summe der Belegungsdauer des ersten Kanals, der Erfassungsdauer des zweiten Kanals und der Belegungsdauer des zweiten Kanals gleich wie oder kleiner als eine gewisse Zeit ist, die basierend auf einem Aufrundungswert eines Resultats einer Berechnung zwischen der maximalen Belegungszeit und der tatsächlichen Belegungszeit bestimmt wird.


 
13. Endgerät nach Anspruch 12,
wobei die Berechnung ein Dividieren der maximalen Belegungszeit durch die tatsächliche Belegungszeit und dann ein Subtrahieren von eins beinhaltet.
 
14. Endgerät nach Anspruch 12, wobei die gewisse Zeit gemäß 1000·Tmcot+aufrund(Tmcot/Tj-1)·Tjs µs bestimmt wird,
wobei Tmcot die maximale Belegungszeit bezeichnet, die der Basisstation oder dem Endgerät möglich ist, um das nicht lizenzierte Band kontinuierlich zu belegen,
wobei Tj die tatsächliche Belegungszeit bezeichnet, die der Basisstation oder dem Endgerät erlaubt ist, um das nicht lizenzierte Band kontinuierlich zu belegen, und
wobei Tjs eine Länge der Erfassungsdauer des zweiten Kanals bezeichnet.
 
15. Endgerät nach Anspruch 12, wobei die Erfassungsdauer des zweiten Kanals Folgendes beinhaltet:

eine Ruhezeitdauer beinhaltet 16 µs, und

zwei Kanalabtastzeitdauern beinhalten jeweils 9 µs.


 


Revendications

1. Procédé permettant la communication d'une station de base (101, 211, 212), le procédé comprenant :

la détermination pour savoir si un canal de bande sans licence d'une bande sans licence est dans un état inactif durant une première durée de détection de canal (335, 435, 535) ;

l'émission de données vers un terminal (104, 214) à travers la bande sans licence durant une première durée d'occupation de canal (340, 440, 540), dans le cas où le canal de bande sans licence de la bande sans licence est à l'état inactif durant la première durée de détection de canal ;

la détermination, lorsque la première durée d'occupation de canal est inférieure à un temps d'occupation maximal (Tmcot, Tmcot,p) possible pour la station de base ou le terminal d'occuper en permanence la bande sans licence et que la première durée d'occupation de canal est égale à un temps d'occupation réel (Tj) accordé à la station de base ou le terminal pour occuper en permanence la bande sans licence, pour savoir si le canal de bande sans licence de la bande sans licence est à l'état inactif durant une seconde durée de détection de canal (350, 450, 550) ; et

l'émission des données vers le terminal à travers la bande sans licence durant une seconde durée d'occupation de canal (360, 460, 560), dans le cas où le canal de bande sans licence de la bande sans licence est à l'état inactif durant la seconde durée de détection de canal,

une somme de la première durée d'occupation de canal, de la seconde durée de détection de canal et de la seconde durée d'occupation de canal étant inférieure ou égale à un certain temps déterminé sur la base d'une valeur d'arrondi d'un résultat d'un calcul entre le temps d'occupation maximal et le temps d'occupation réel.


 
2. Procédé selon la revendication 1,
ledit calcul comprenant la division du temps d'occupation maximal par le temps d'occupation réel, et puis la soustraction de la valeur un.
 
3. Procédé selon la revendication 1, ledit certain temps étant déterminé selon 1000·Tmcot+ceil(Tmcot/Tj-1)·Tjs µs,
où Tmcot représente le temps d'occupation maximal possible pour la station de base ou le terminal pour occuper en permanence la bande sans licence,
où Tj représente le temps d'occupation réel accordé à la station de base ou le
terminal pour occuper en permanence la bande sans licence, et
où Tjs représente une longueur de la seconde durée de détection de canal.
 
4. Procédé selon la revendication 1, ladite seconde durée de détection de canal (550) comprenant :

une durée de créneau inactif (555) comprenant 16 µs, et

deux durées de créneau de détection de canal (557) comprenant chacune 9 µs.


 
5. Procédé de communication d'un terminal (104, 214), le procédé comprenant :

la réception des données en provenance d'une station de base (101, 211, 212) à travers une bande sans licence durant une première durée d'occupation de canal (340, 440, 540), dans le cas où un canal de bande sans licence de la bande sans licence est à l'état inactif durant une première durée de détection de canal (335, 435, 535) ; et

la réception, lorsque la première durée d'occupation de canal est inférieure à un temps d'occupation maximal (Tmcot, Tmcot,p) possible pour la station de base ou le terminal pour occuper en permanence la bande sans licence et que la première durée d'occupation de canal est égale à un temps d'occupation réel (Tj) accordé à la station de base ou au terminal pour occuper en permanence la bande sans licence, des données en provenance de la station de base à travers la bande sans licence durant une seconde durée d'occupation de canal (360, 460, 560), dans le cas où le canal de bande sans licence de la bande sans licence est à l'état inactif durant une seconde durée de détection de canal (350, 450, 550),

une somme de la première durée d'occupation de canal, de la seconde durée de détection de canal et de la seconde durée d'occupation de canal étant inférieure ou égale à un certain temps déterminé sur la base d'une valeur d'arrondi d'un résultat d'un calcul entre le temps d'occupation maximal et le temps d'occupation réel.


 
6. Procédé selon la revendication 5,
ledit calcul comprenant la division du temps d'occupation maximal par le temps d'occupation réel, et puis la soustraction de la valeur un.
 
7. Procédé selon la revendication 5, ledit certain temps étant déterminé selon 1000·Tmcot+ceil(Tmcot/Tj-1)·Tjs µs,
où Tmcot représente le temps d'occupation maximal possible pour la station de base ou le terminal pour occuper en permanence la bande sans licence,
où Tj représente le temps d'occupation réel accordé à la station de base ou au terminal pour occuper en permanence la bande sans licence,
Tjs représente une longueur de la seconde durée de détection de canal, et ladite seconde durée de détection de canal comprenant : une durée de créneau inactif comprenant 16 µs, et deux durées de créneau de détection de canal comprenant chacune 9 µs.
 
8. Station de base (101, 211, 212) comprenant :

un émetteur-récepteur (610, 710) configuré pour émettre ou recevoir un signal ; et

un dispositif de commande (620, 720) configuré pour :

déterminer si un canal de bande sans licence d'une bande sans licence est à l'état inactif durant une première durée de détection de canal (335, 435, 535),

commander à l'émetteur-récepteur d'émettre des données vers un terminal (104, 214) à travers la bande sans licence durant une première durée d'occupation de canal (340, 440, 540), dans le cas où le canal de bande sans licence de la bande sans licence est à l'état inactif durant la durée de détection du premier canal,

déterminer, lorsque la première durée d'occupation de canal est inférieure à un temps d'occupation maximal (Tmcot, Tmcot,p) possible pour la station de base ou le terminal pour occuper en permanence la bande sans licence et que la durée d'occupation du premier canal est égale à un temps d'occupation réel (Tj) accordé à la station de base ou au terminal pour occuper en permanence la bande sans licence, que le canal de bande sans licence de la bande sans licence est à l'état inactif durant une seconde durée de détection de canal (350, 450, 550), et

commander à l'émetteur-récepteur d'émettre les données au terminal à travers la bande sans licence durant une seconde durée d'occupation de canal (360, 460, 560), au cas où le canal de bande sans licence de la bande sans licence est à l'état inactif durant la durée de détection du second canal,

une somme de la première durée d'occupation de canal, de la seconde durée de détection de canal et de la seconde durée d'occupation de canal étant inférieure ou égale à un certain temps déterminé sur la base d'une valeur d'arrondi d'un résultat d'un calcul entre le temps d'occupation maximal et le temps d'occupation réel.


 
9. Station de base selon la revendication 8,
ledit calcul comprenant la division du temps d'occupation maximal par le temps d'occupation réel, et puis la soustraction de la valeur un.
 
10. Station de base selon la revendication 8, ledit certain temps étant déterminé selon 1000·Tmcot+ceil(Tmcot/Tj-1)·Tjs µs,
où Tmcot représente le temps d'occupation maximal possible pour la station de base ou le terminal pour occuper en permanence la bande sans licence,
où Tj représente le temps d'occupation réel accordé à la station de base ou le terminal pour occuper en permanence la bande sans licence, et
où Tjs représente une longueur de la seconde durée de détection de canal.
 
11. Station de base selon la revendication 8, ladite seconde durée de détection de canal comprenant :

une durée de créneau inactif comprenant 16 µs, et

deux durées de créneau de détection de canal comprenant chacune 9 µs.


 
12. Terminal (104, 214) comprenant :

un émetteur-récepteur configuré pour émettre et/ou recevoir un signal ; et

un dispositif de commande (720) configuré pour :

commander à l'émetteur-récepteur de recevoir des données en provenance d'une station de base (101, 211, 212) à travers une bande sans licence durant une première durée d'occupation de canal (340, 440, 540), dans le cas où un canal de bande sans licence de la bande sans licence est à l'état inactif durant une première durée de détection de canal (335, 435, 535),

commander à l'émetteur-récepteur de recevoir, lorsque la première durée d'occupation de canal est inférieure à un temps d'occupation maximal (Tmcot, Tmcot,p) possible pour la station de base ou le terminal pour occuper en permanence la bande sans licence et que la première durée d'occupation de canal est égale à un temps d'occupation réel (Tj) accordé à la station de base ou au terminal pour occuper en permanence la bande sans licence, des données en provenance de la station de base à travers la bande sans licence durant une seconde durée d'occupation de canal (360, 460, 560), dans le cas où le canal de bande sans licence de la bande sans licence est à l'état inactif durant une seconde durée de détection de canal (350, 450, 550),

une somme de la première durée d'occupation de canal, de la seconde durée de détection de canal et de la seconde durée d'occupation de canal étant inférieure ou égale à un certain temps déterminé sur la base d'une valeur d'arrondi d'un résultat d'un calcul entre le temps d'occupation maximal et le temps d'occupation réel.


 
13. Terminal selon la revendication 12,
ledit calcul comprenant la division du temps d'occupation maximal par le temps d'occupation réel, et puis la soustraction de la valeur un.
 
14. Terminal selon la revendication 12, ledit certain temps étant déterminé selon 1000·Tmcot+ceil(Tmcot/Tj-1)·Tjs µs,
où Tmcot représente le temps d'occupation maximal possible pour la station de base ou le terminal pour occuper en permanence la bande sans licence,
où Tj représente le temps d'occupation réel accordé à la station de base ou le terminal pour occuper en permanence la bande sans licence, et
où Tjs représente une longueur de la seconde durée de détection de canal.
 
15. Terminal selon la revendication 12, ladite seconde durée de détection de canal comprenant :

une durée de créneau inactif comprenant 16 µs, et

deux durées de créneau de détection de canal comprenant chacune 9 µs.


 




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Cited references

REFERENCES CITED IN THE DESCRIPTION



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Non-patent literature cited in the description