(19)
(11)EP 3 443 792 B1

(12)EUROPEAN PATENT SPECIFICATION

(45)Mention of the grant of the patent:
04.11.2020 Bulletin 2020/45

(21)Application number: 17721102.6

(22)Date of filing:  27.04.2017
(51)International Patent Classification (IPC): 
H04W 72/04(2009.01)
H04L 5/00(2006.01)
H04W 72/12(2009.01)
(86)International application number:
PCT/EP2017/060113
(87)International publication number:
WO 2017/194324 (16.11.2017 Gazette  2017/46)

(54)

COMMUNICATIONS DEVICE, INFRASTRUCTURE EQUIPMENT, WIRELESS COMMUNICATIONS NETWORK AND METHODS

KOMMUNIKATIONSVORRICHTUNG, INFRASTRUKTURAUSRÜSTUNG, DRAHTLOSKOMMUNIKATIONSNETZWERK UND -VERFAHREN

DISPOSITIF DE COMMUNICATION, ÉQUIPEMENT D'INFRASTRUCTURE, RÉSEAU DE COMMUNICATIONS SANS FIL ET PROCÉDÉS


(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: 13.05.2016 EP 16169734

(43)Date of publication of application:
20.02.2019 Bulletin 2019/08

(73)Proprietors:
  • Sony Corporation
    Tokyo 108-0075 (JP)
  • Sony Europe Limited
    Brooklands Weybridge KT13 0XW (GB)
    Designated Contracting States:
    AL 

(72)Inventors:
  • WONG, Shin Horng
    Basingstoke Hampshire RG22 4SB (GB)
  • BEALE, Martin Warwick
    Basingstoke Hampshire RG22 4SB (GB)
  • ATUNGSIRI, Samuel Asangbeng
    Basingstoke Hampshire RG22 4SB (GB)

(74)Representative: D Young & Co LLP 
120 Holborn
London EC1N 2DY
London EC1N 2DY (GB)


(56)References cited: : 
  
  • NTT DOCOMO ET AL: "Initial views on frame structure for NR access technology", 3GPP DRAFT; R1-163112, 3RD GENERATION PARTNERSHIP PROJECT (3GPP), MOBILE COMPETENCE CENTRE ; 650, ROUTE DES LUCIOLES ; F-06921 SOPHIA-ANTIPOLIS CEDEX ; FRANCE , vol. RAN WG1, no. Busan, Korea; 20160411 - 20160415 1 April 2016 (2016-04-01), XP051079874, Retrieved from the Internet: URL:http://www.3gpp.org/ftp/tsg_ran/WG1_RL 1/TSGR1_84b/Docs/ [retrieved on 2016-04-01]
  • S. Sesia, I. Toufik, M. Baker: "LTE The UMTS Long Term Evolution: From Theory to Practice", 1 January 2011 (2011-01-01), John Wiley & Sons Ltd., Chichester, XP002771972, ISBN: 9780470660256 page 68, line 3 - line 6
  
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

BACKGROUND


Field of Disclosure



[0001] The present disclosure relates to communications devices, which are configured to transmit uplink signals to and/or receive downlink signals from an infrastructure equipment of a mobile communications network via a wireless access interface. The present technique also relates to infrastructure equipment and methods of communicating.

Description of Related Art



[0002] The "background" description provided herein is for the purpose of generally presenting the context of the disclosure. Work of the presently named inventors, to the extent it is described in this background section, as well as aspects of the description which may not otherwise qualify as prior art at the time of filing, are neither expressly or impliedly admitted as prior art against the present invention.

[0003] Third and fourth generation wireless communications systems, such as those based on the third generation partnership project (3GPP) defined UMTS and Long Term Evolution (LTE) architecture are able to support sophisticated services such as instant messaging, video calls as well as high speed internet access. For example, with the improved radio interface and enhanced data rates provided by LTE systems, a user is able to enjoy high data rate applications such as mobile video streaming and mobile video conferencing that would previously only have been available via a fixed line data connection. The demand to deploy third and fourth generation networks is therefore strong and the coverage area of these networks, i.e. geographic locations where access to the networks is possible, is expected to increase rapidly. However, whilst fourth generation networks can support communications at high data rate and low latencies from devices such as smart phones and tablet computers, it is expected that future wireless communications networks will need to support communications to and from a much wider range of devices, including reduced complexity devices, machine type communication devices, devices which require little or no mobility, high resolution video displays and virtual reality headsets. As such, supporting such a wide range of communications devices can represent a technical challenge for a wireless communications network.

[0004] The wireless access interface of an LTE-type mobile communications network is configured to have a time divided frame structure comprising a frame length of 10ms, which is comprised of ten subframes having a 1ms duration, with each subframe being comprised of fourteen communications resource elements of Orthogonal Frequency Division Multiplexed (OFDM) symbols. However whilst the frame structure for LTE has been in general designed to provide high data rates, future radio access technologies may be required to support a much greater variety of applications and use cases.

[0005] 3GPP document R1-163112 "Initial views on frame structure for NR access technology", NTT DOCOMO, Inc., 3GPP TSG RAN WG1 Meeting #84bis, 11-15 April 2016, discloses frame structure proposals and observations for NR access technology.

SUMMARY OF THE DISCLOSURE



[0006] The object of the present invention is achieved by the features of the appended independent claims.

[0007] Example embodiments of the present technique can provide an arrangement in which a wireless access interface comprises a plurality of communications resource elements arranged in time and frequency, the wireless access interface being configured and arranged to comprise a plurality of transmission units, each of the transmission units comprising a predetermined number of the communications resource elements. Furthermore, the wireless communications network is configured to form combined transmission units from one or more of the transmission units, which can be allocated by the wireless communications network to one or more communications devices for receiving signals from the infrastructure equipment or transmitting signals to the infrastructure equipment.

[0008] Embodiments of the present technique can be arranged to allocate communications resources of a wireless access interface based on combined transmission units, which can be adapted and configured to support a greater variety of applications and use cases.

[0009] Further respective aspects and features are defined by the appended claims.

[0010] The foregoing paragraphs have been provided by way of general introduction, and are not intended to limit the scope of the following claims. The described embodiments, together with further advantages, will be best understood by reference to the following detailed description taken in conjunction with the accompanying drawings.

BRIEF DESCRIPTION OF THE DRAWINGS



[0011] A more complete appreciation of the disclosure and many of the attendant advantages thereof will be readily obtained as the same becomes better understood by reference to the following detailed description when considered in connection with the accompanying drawings wherein like reference numerals designate identical or corresponding parts throughout the several views, and wherein:

Figure 1 is a schematic block diagram illustrating an example of a mobile telecommunication system;

Figure 2 is a schematic representation illustrating a frame structure of a down-link of a wireless access interface according to an LTE standard;

Figure 3 is a schematic representation illustrating a frame structure of an up-link of wireless access interface according to an LTE standard;

Figure 4 is a schematic illustration of different types of transmission units according to the present technique;

Figure 5 is a schematic illustration of different examples of combined transmission units according to the present technique;

Figure 6 is a schematic illustration of a combined transmission unit which includes transmission units for uplink and downlink transmissions according to the present technique;

Figure 7 is a schematic illustration of further example of a combined transmission unit which includes transmission units for uplink and downlink transmissions having an extended down link transmission section according to the present technique;

Figure 8 is a schematic illustration of a combined transmission unit which includes transmission units for uplink and downlink transmissions which are configured to support a Multiple Input Multiple Output scheme according to the present technique; and

Figure 9 is a schematic illustration part block diagram illustrating an arrangement in which a communications device receives an indication of a combined transmission unit for transmitting or receiving via a wireless communications network.


DETAILED DESCRIPTION OF THE EMBODIMENTS


Conventional Communications System



[0012] Figure 1 provides a schematic diagram illustrating some basic functionality of a mobile telecommunications network / system 100 operating in accordance with LTE principles and which may be helpful in appreciating the embodiments of the disclosure as described further below. Various elements of Figure 1 and their respective modes of operation are well-known and defined in the relevant standards administered by the 3GPP (RTM) body, and also described in many books on the subject, for example, Holma H. and Toskala A [1]. It will be appreciated that operational aspects of the telecommunications network which are not specifically described below may be implemented in accordance with any known techniques, for example according to the relevant standards.

[0013] The network 100 includes a plurality of base stations 101 connected to a core network 102. Each base station provides a coverage area 103 (i.e. a cell) within which data can be communicated to and from communications devices 104. Data is transmitted from base stations 101 to communications devices 104 within their respective coverage areas 103 via a radio downlink. Data is transmitted from communications devices 104 to the base stations 101 via a radio uplink. The uplink and downlink communications are made using radio resources that are licenced for exclusive use by the operator of the network 100. The core network 102 routes data to and from the communications devices 104 via the respective base stations 101 and provides functions such as authentication, mobility management, charging and so on. Communications devices may also be referred to as mobile stations, user equipment (UE), user device, mobile radio, and so forth. Base stations may also be referred to as transceiver stations / NodeBs / eNodeBs (eNB for short), and so forth.

[0014] Wireless communications systems such as those arranged in accordance with the 3GPP defined Long Term Evolution (LTE) architecture use an orthogonal frequency division modulation (OFDM) based interface for the radio downlink (so-called OFDMA) and a single carrier frequency division multiple access scheme (SC-FDMA) on the radio uplink.

[0015] Figure 2 provides a simplified schematic diagram of the structure of a downlink of a wireless access interface that may be provided by or in association with the eNB of Figure 1 when the communications system is operating in accordance with the LTE standard. In LTE systems the wireless access interface of the downlink from an eNB to a UE is based upon an orthogonal frequency division multiplexing (OFDM) access radio interface. In an OFDM interface the resources of the available bandwidth are divided in frequency into a plurality of orthogonal subcarriers and data is transmitted in parallel on a plurality of orthogonal subcarriers, where bandwidths between 1.25MHZ and 20MHz bandwidth may be divided into 128 to 2048 orthogonal subcarriers for example. Each subcarrier bandwidth may take any value but in LTE it is conventionally fixed at 15KHz. However it has been proposed in the future [2][3] to provide also a reduced subcarrier spacing of 3.75 kHz for certain parts of the LTE wireless access interface for both the uplink and the downlink. As shown in Figure 2, the resources of the wireless access interface are also temporally divided into frames where a frame 200 lasts 10ms and is subdivided into 10 subframes 201 each with a duration of 1ms. Each subframe is formed from 14 OFDM symbols and is divided into two slots each of which comprise six or seven OFDM symbols depending on whether a normal or extended cyclic prefix is being utilised between OFDM symbols for the reduction of inter symbol interference. The resources within a slot may be divided into resources blocks 203 each comprising 12 subcarriers for the duration of one slot and the resources blocks further divided into resource elements 204 which span one subcarrier for one OFDM symbol, where each rectangle 204 represents a resource element. More details of the down-link structure of the LTE wireless access interface are provided in Annex 1.

[0016] Figure 3 provides a simplified schematic diagram of the structure of an uplink of an LTE wireless access interface that may be provided by or in association with the eNB of Figure 1. In LTE networks the uplink wireless access interface is based upon a single carrier frequency division multiplexing FDM (SC-FDM) interface and downlink and uplink wireless access interfaces may be provided by frequency division duplexing (FDD) or time division duplexing (TDD), where in TDD implementations subframes switch between uplink and downlink subframes in accordance with predefined patterns. However, regardless of the form of duplexing used, a common uplink frame structure is utilised. The simplified structure of Figure 3 illustrates such an uplink frame in an FDD implementation. A frame 300 is divided in to 10 subframes 301 of 1ms duration where each subframe 301 comprises two slots 302 of 0.5ms duration. Each slot is then formed from seven OFDM symbols 303 where a cyclic prefix 304 is inserted between each symbol in a manner equivalent to that in downlink subframes. In Figure 3 a normal cyclic prefix is used and therefore there are seven OFDM symbols within a subframe, however, if an extended cyclic prefix were to be used, each slot would contain only six OFDM symbols. The resources of the uplink subframes are also divided into resource blocks and resource elements in a similar manner to downlink subframes. More details of the LTE up-link represented in Figure 3 are provided in Annex 1.

Flexible Frame Structure



[0017] It has been proposed for future wireless access interfaces to develop a New Radio Access Technology (NR) [1]. This new Radio Access Technology (RAT) is proposed for a next generation wireless communication system, i.e. 5G. The new RAT is proposed to operate in a large range of frequencies, from hundreds of MHz to 100 GHz and it is expected to cover a broad range of use cases. The use cases that are considered for this new RAT are:
  • Enhanced Mobile Broadband (eMBB)
  • Massive Machine Type Communications (mMTC)
  • Ultra Reliable & Low Latency Communications (URLLC)


[0018] This new RAT is also expected to be forward compatible, i.e., the legacy design should allow future system (e.g. RAT or feature) to easily share resources with this NR.

[0019] One of the aspects for NR is the frame structure to be used for transmissions. As explained above with reference to Figures 1, 2 and 3, in LTE, the frame structure consists of a downlink subframe 201 and uplink subframe 300 which are fixed to 1 ms duration. LTE was designed with broadband use cases in mind and hence a fixed 1 ms subframe was used. However, in NR, the use cases have different (opposing) requirements. For example in URLLC, the transmission needs to be sent quickly with high reliability whereas for mMTC, the transmission is often tolerant to high latency. In eMBB, the large packet size is expected to be transmitted frequently whereas in mMTC, small packet size is expected infrequently. Hence, a single frame structure such as a fixed 1ms subframe defined in LTE is not suitable to cover such broad use cases.

[0020] Embodiments of the present technique can provide an arrangement in which a wireless access interface comprises a plurality of communications resource elements arranged in time and frequency, the wireless access interface being configured and arranged to comprise a plurality of transmission units, each of the transmission units comprising a predetermined number of the communications resource elements. Furthermore, the wireless communications network is configured to form combined transmission units from one or more of the transmission units, which can be allocated by the wireless communications network to one or more communications devices for receiving signals from the infrastructure equipment or transmitting signals to the infrastructure equipment.

[0021] For example the communications resources may be formed into a grid of time and frequency elements, which may be for example units of OFDM symbols. One or more of the time and frequency resources define basic building blocks, which can be combined to form a frame structure dedicated to a communications device or group of communications devices. In the following paragraphs this building block is referred to as Transmission Unit (TU). A TU consists of a set of resources (e.g. frequency, time, code) that perform one or more functions. Some examples of TU are:
  • Data resources & reference resources
  • Reference resource only
  • Data resource only
  • Blank
  • Syncrhonisation resources


[0022] These examples are shown in Figure 4 where for illustration purpose we use the LTE resource element as making-up the communications resources. Here the TU is two symbols long. It should be appreciated that other TU lengths are possible and they need not be a fixed size and different TUs can have different lengths.

[0023] In some examples one or more TUs may be grouped to define a Combined TU (CTU), where the CTU consists of one or more TUs concatenated in time or frequency. The CTU thus forms a frame structure, similar to a subframe in LTE. The network would then signal to the UEs various TUs that forms a CTU where each CTU can then be tailored to a specific use case or application. In this way the network has flexibility to transmit a frame structure that is suitable and/or adapted for a particular UE under a particular use case or application.

[0024] In Figure 4 a first example 400 shows a combination of TU's to form a CTU which includes TU's for transmitting data 401 and TU's for transmitting reference symbols 402. As shown for the examples in Figure 4 each of the example CTU's comprise TU's of two OFDM symbols and therefore each CTU has a column width of 2 but a number of rows representing 12 CTU's in frequency. A second example 404 provides a CTU with TU's for transmission of downlink data only whereas a third TU 406 provides an example of a CTU with TU's for transmission of reference signals only. A fourth example 408 illustrates a CTU in which nothing is transmitted and is therefore blank whereas a fifth example represents a CTU for transmission of synchronisation signals 410. As will be appreciates some TU's may be allocated for the downlink and some for the uplink. Two further examples 412, 414 provide examples of CTU's for transmission of uplink data only 412 and uplink reference symbols only 414.

[0025] An example illustrating different use cases is shown in Figure 5. In Figure 5 a first example CTU 500 provides a CTU for normal downlink data transmission and therefore includes reference symbols reference TU's 502 and TU's for transmitting data 504 but the reference TU's are relatively sparsely arranged for sampling a slow moving or not rapidly changing channel. In contrast the second example 510 provides a corresponding illustration with each of 3 columns of reference symbols separated by columns of data TU's 514. For a second example 510 the CTU is designed for transmitting data on the downlink to a fast moving UE and therefore the channel is rapidly changing and therefore requires and increased density of reference signal elements or symbols. A UE may be under high speed conditions benefit from having more Reference Signals in time (right hand side 510 of Figure 5) compared to another UE that is in normal speed (left hand side 500 of Figure 5). The network can then indicate one set of TUs for the high speed UE with denser Reference Signal and another set of TUs for a normal speed UE that has less dense Reference Signal.

[0026] The CTU can also be constructed for different functions, for example, for Ultra-Reliable Low-Latency communication (URLLC). For an URLLC application, the CTU can enable a fast ACK/NACK for a TDD system such as the example shown in Figure 6. In Figure 6, a downlink section 600 is provided for the transmission of downlink data in data supporting DTU's 602 with separate reference symbols 604. An ACK/NACK symbol is transmitted on the uplink in response to the downlink transmission of data in the first section 600 in an uplink transmission section 610 which is separated by a void or blank section 612. In the left-hand side of the uplink section 612 the TU's are allocated for transmitting reference symbols whereas the second column of TU's 616 is used for transmitting data representing the ACK/NACK signal. Here the CTU firstly consists of downlink data plus some reference signals followed by some blank TUs. The blank TUs 612 allow the UE to perform timing advance, to switch from downlink to uplink, process the downlink data and prepare for the acknowledgement in the following uplink TUs. The CTU in Figure 6 can be further extended for example to have longer DL transmission such as for eMBB as shown in the example in Figure 7.

[0027] In the example shown in Figure 7 which corresponds to the example shown in Figure 6 the CTU is shown to include a first and second section dedicate to the transmission of downlink data providing a normal density of reference symbols 604 followed by a section 704 which corresponds to the CTU showing in Figure 6.

[0028] CTU can be formed for massive MIMO transmission (i.e. basestation with large number of transmission elements) in TDD, where providing reference signal and feedback for each of the transmission element is not practical. In a TDD system, the network can make use of channel reciprocity by providing resource for the UE in the uplink for sending pilot (reference signals) prior to transmitting downlink (MIMO) data to the UE in the same resources. A CTU as shown in Figure 8 can be used for such transmission. Here the CTU consists of pilot TUs, followed by blank TUs to allow the network to determine the precoding weights prior to sending the downlink data to the UE. NOTE: In this example the network can send a control indicator (e.g. such as a DCI) to the UE in a separate CTU to schedule the CTU shown in Figure 8.

[0029] An example embodiments of the present technique in which a UE is signalled a CTU for use in transmitting or receiving data depending on the CTU as showing in Figure 9. As shown in Figure 9 an eNodeB 901 is shown to include a transmitter 900, a receiver 902 and a controller 904. The controller 904 controllers the transmitter 900 and the receiver 902 to transmit and receiver signals via an antenna 906. The eNodeB 901 is shown to transmit a signalling message 910 to a UE 920. The UE 920 includes a transmitter 922, a receiver 924 and a controller 926. The controller 926 controls the transmitter 922 and the receiver 924 to transmit signals to the eNodeB 901 and receiver signals from the eNodeB 901 via an antenna 928.

[0030] As will be appreciated in order to configure a UE to receive or transmit data via a CTU, the structure of the CTU and its location within timer and frequency resources providing by a system bandwidth needs to be signalled to a UE 920. As shown in Figure 9 represented by a grid of boxes 940 is a representation of time and frequency resources which are available to the eNodeB for allocation to UE's operating within a mobile communications network of which the eNodeB 901 forms part. As explained above each of the boxes within the grid 904 representing the timed frequency resources can represent a basic unit of communications resource such as a Resource Element. One or more of the units of communications resource can be combined to form a TU which can be allocated by the eNodeB on an individual basis to a UE. The eNodeB can also determine the type of use which each TU will be dedicated for allocating a CTU to a UE. As shown in Figure 9 within a bolder block 904 representing a CTU which has been allocated to a UE 920 an example CTU is shown to include TU's dedicated to data 944 and TU's dedicated to transmitting reference symbols 946. As shown in Figure 9, message element 910 is transmitted to the UE 920 which identifies the CTU 942 for use by the UE in receiving or transmitting data. For example the CTU 942 may represent a downlink transmission of data to the UE 920. Therefore the CTU width 948 may represent the frame length for the UE which may be dedicated and tailored to an application being provided by the UE 920.

[0031] The CTU can be designed to be self-contained for both TDD and FDD. An FDD self-contained CTU does not rely on the presence of surrounding structures in order to be decodable. A TDD self-contained CTU does not rely on surrounding structures and may additionally contain TUs for both link directions (in FDD, it would also be possible to define some association between TUs in UL and DL directions in order to create self-contained CTU, but this may rely on some known timing relationship between UL and DL carriers). When the CTU are self-contained, it is much easier to provide for forward compatibility.

[0032] The components of a CTU are signalled to the UE or blind decoded by the UE. The following are embodiments where this can be done.

[0033] In an embodiment the synchronization signals (e.g. PSS or SSS in LTE) are transmitted in a known CTU. The sequences in the synchronization signal would indicate the CTU construction for the primary broadcast message (e.g. PBCH in LTE).

[0034] In another embodiment the primary broadcast message is transmitted in a known CTU and the primary broadcast message would indicate the CTU construction for the SIBs. The SIBs can further indicate the CTU construction for other common messages.

[0035] In another embodiment, the UE blind decodes an initial broadcast channel based on several blind decoding hypotheses of the CTU construction of the broadcast channel. The broadcast channel may then, possibly hierarchically, define the other CTU constructions to be used in the system.

[0036] It should be appreciated that there can be a large number of different TUs combinations leading to a large number of possible CTUs. It is likely that only a small subset of possible CTU constructions are used. Hence in another embodiment, the broadcast common messages such as PBCH and SIB indicate a set of CTU constructions that are used by the network.

[0037] In another embodiment, the indication of the CTU constructions can be hierarchical. As an example, a known CTU construction can be applied to a broadcast channel (such as the LTE PBCH). The broadcast channel can then define a larger set of CTU constructions for a further channel transmitting system information. The system information channel then may transmit an even larger set of CTU constructions that are to be used in the system. This hierarchical approach to signalling CTU constructions has the advantages of allowing the system to bootstrap while minimising message sizes on channels with constrained message-carrying capacity (such as the broadcast channel).

[0038] In another embodiment the possible set of CTUs construction are listed in the specifications and are numerated. The network can then indicate the CTUs used by signalling the numerated indices in the broadcast messages (e.g. PBCH and SIB).

[0039] In another embodiment the CTU construction is UE specific and indicated by higher layer messages (e.g. such as RRC). Here the UE upon connection would indicate the type of services it requires and the network would then configure a CTU that is suitable for this service. For example if the UE requires URLLC, the network can configure a CTU that has very short length (e.g. 0.2 ms) to allow message to be sent with quick turnaround time.

[0040] A UE configured with one type of CTU will use it until it is reconfigured by another type of CTU. Such reconfiguration can be dependent for example, upon a change to the UE's service or radio condition.

[0041] In another embodiment, the UE is only able to operate with a limited set of CTU constructions. For example, a low complexity MTC device may not be able to operate with the fast ACK/NACK construction shown in Figure 6. In this case, the UE may signal its CTU capability by using a PRACH preamble resource from a set of PRACH preamble resources. The base station knows the CTU capability of the device based on the PRACH preamble used by the device.

[0042] In another embodiment, the UE decodes broadcast information on CTU constructions from a plurality of cells. The UE then camps onto a cell that uses a CTU construction that is compatible with that UE.

[0043] In another embodiment the CTU construction is indicated in the DL or UL grant (e.g. DCI in LTE) which is sent using layer 1 messages, giving high flexibility to the network in each transmission. This allows the network to adapt to the UE's condition and possibly change of services. For example, the UE may initially move in a low speed (e.g. walking toward the car) and then suddenly move to high speed (e.g. drive into a highway) and such dynamic CTU indication would enable smooth transition of frame structure from low speed to high speed. In the DL grant, the CTU indication can either be explicit, enumerated or implicit:
  • explicit: the constituent TUs and their locations are explicitly defined
  • enumerated: a common message (e.g. PBCH, SIB) enumerates a list of potential CTU constructions. The DL grant indicates an index of the enumerated CRU
  • implicit: the CTU construction to use is explicitly understood by the UE based on other contents of the DCI. For example, if the DCI indicates a transport block coded with a low coding rate (for low SNR conditions), the UE implicitly understands that a CTU construction using a larger number of reference symbols is used. Another implicit way is based on for example the MCS or Transport Block size used in the grant which can have a direct mapping to a specific CTU construction.


[0044] In another embodiment, the DL grant (dynamic indication in layer 1 message) can indicate a CTU construction that is valid for a fixed duration of period (e.g. X ms). This can reduce the amount of signaling required. For example the CTU used in TDD can consists of 4 DL data TUs, some blank TUs and 4 UL data TUs and this can be used for X ms.

[0045] In another embodiment a basic CTU construction is signalled to the UE either using RRC or DL grant and incremental changes to this basic CTU is signalled to the UE further DL grants. For example, the basic CTU construction can consists of 4 DL data TUs and if the network can indicate additional DL TUs in steps of 4 DL data TUs to provide additional resources in the downlink. In another example, the CTU construction is indicated by RRC (or specified a-priori) to consist of 'N' fixed / semi static TUs and 'M' TUs that are signalled dynamically in DCI.

[0046] In another embodiment some channels such as control channel (e.g. EPDCCH or PDCCH in LTE) uses a semi-static CTU construction that is signalled by higher layers such as RRC. The control channel would then indicate the CTU construction for the data channel (e.g. PDSCH or PUSCH in LTE) dynamically via a grant. An example the network may transmit to a TDD UE using massive MIMO and indicate a CTU construction such as that in Figure 8 and at a later scheduling instance it may decide not to use massive MIMO and schedule the UE using a prolonged DL transmission such as that in Figure 7.

[0047] It should be appreciated that by providing flexibility to the frame structure such as using CTU, the network can provide a broad range of use cases to different devices within the same carrier.

[0048] Numerous modifications and variations of the present disclosure are possible in light of the above teachings. It is therefore to be understood that within the scope of the appended claims, the disclosure may be practiced otherwise than as specifically described herein.

[0049] In so far as embodiments of the disclosure have been described as being implemented, at least in part, by software-controlled data processing apparatus, it will be appreciated that a non-transitory machine-readable medium carrying such software, such as an optical disk, a magnetic disk, semiconductor memory or the like, is also considered to represent an embodiment of the present disclosure.

[0050] It will be appreciated that the above description for clarity has described embodiments with reference to different functional units, circuitry and/or processors. However, it will be apparent that any suitable distribution of functionality between different functional units, circuitry and/or processors may be used without detracting from the embodiments.

[0051] Described embodiments may be implemented in any suitable form including hardware, software, firmware or any combination of these. Described embodiments may optionally be implemented at least partly as computer software running on one or more data processors and/or digital signal processors. The elements and components of any embodiment may be physically, functionally and logically implemented in any suitable way. Indeed the functionality may be implemented in a single unit, in a plurality of units or as part of other functional units. As such, the disclosed embodiments may be implemented in a single unit or may be physically and functionally distributed between different units, circuitry and/or processors.

[0052] Although the present disclosure has been described in connection with some embodiments, it is not intended to be limited to the specific form set forth herein. Additionally, although a feature may appear to be described in connection with particular embodiments, one skilled in the art would recognize that various features of the described embodiments may be combined in any manner suitable to implement the technique.

Annex 1:



[0053] The simplified structure of the downlink of an LTE wireless access interface presented in Figure 2, also includes an illustration of each subframe 201, which comprises a control region 205 for the transmission of control data, a data region 206 for the transmission of user data , reference signals 207 and synchronisation signals which are interspersed in the control and data regions in accordance with a predetermined pattern. The control region 204 may contain a number of physical channels for the transmission of control data, such as a physical downlink control channel PDCCH, a physical control format indicator channel PCFICH and a physical HARQ indicator channel PHICH. The data region may contain a number of physical channel for the transmission of data, such as a physical downlink shared channel PDSCH and a physical broadcast channels PBCH. Although these physical channels provide a wide range of functionality to LTE systems, in terms of resource allocation and the present disclosure PDCCH and PDSCH are most relevant. Further information on the structure and functioning of the physical channels of LTE systems can be found in [1].

[0054] Resources within the PDSCH may be allocated by an eNodeB to UEs being served by the eNodeB. For example, a number of resource blocks of the PDSCH may be allocated to a UE in order that it may receive data that it has previously requested or data which is being pushed to it by the eNodeB, such as radio resource control RRC signalling. In Figure 2, UE1 has been allocated resources 208 of the data region 206, UE2 resources 209 and UE resources 210. UEs in a an LTE system may be allocated a fraction of the available resources of the PDSCH and therefore UEs are required to be informed of the location of their allocated resources within the PDCSH so that only relevant data within the PDSCH is detected and estimated. In order to inform the UEs of the location of their allocated communications resources, resource control information specifying downlink resource allocations is conveyed across the PDCCH in a form termed downlink control information DCI, where resource allocations for a PDSCH are communicated in a preceding PDCCH instance in the same subframe. During a resource allocation procedure, UEs thus monitor the PDCCH for DCI addressed to them and once such a DCI is detected, receive the DCI and detect and estimate the data from the relevant part of the PDSCH.
Each uplink subframe may include a plurality of different channels, for example a physical uplink shared channel PUSCH 305, a physical uplink control channel PUCCH 306, and a physical random access channel PRACH. The physical Uplink Control Channel PUCCH may carry control information such as ACK/NACK to the eNodeB for downlink transmissions, scheduling request indicators SRI for UEs wishing to be scheduled uplink resources, and feedback of downlink channel state information CSI for example. The PUSCH may carry UE uplink data or some uplink control data. Resources of the PUSCH are granted via PDCCH, such a grant being typically triggered by communicating to the network the amount of data ready to be transmitted in a buffer at the UE. The PRACH may be scheduled in any of the resources of an uplink frame in accordance with a one of a plurality of PRACH patterns that may be signalled to UE in downlink signalling such as system information blocks. As well as physical uplink channels, uplink subframes may also include reference signals. For example, demodulation reference signals DMRS 307 and sounding reference signals SRS 308 may be present in an uplink subframe where the DMRS occupy the fourth symbol of a slot in which PUSCH is transmitted and are used for decoding of PUCCH and PUSCH data, and where SRS are used for uplink channel estimation at the eNodeB. Further information on the structure and functioning of the physical channels of LTE systems can be found in [1].

[0055] In an analogous manner to the resources of the PDSCH, resources of the PUSCH are required to be scheduled or granted by the serving eNodeB and thus if data is to be transmitted by a UE, resources of the PUSCH are required to be granted to the UE by the eNode B. At a UE, PUSCH resource allocation is achieved by the transmission of a scheduling request or a buffer status report to its serving eNodeB. The scheduling request may be made, when there is insufficient uplink resource for the UE to send a buffer status report, via the transmission of Uplink Control Information UCI on the PUCCH when there is no existing PUSCH allocation for the UE, or by transmission directly on the PUSCH when there is an existing PUSCH allocation for the UE. In response to a scheduling request, the eNodeB is configured to allocate a portion of the PUSCH resource to the requesting UE sufficient for transferring a buffer status report and then inform the UE of the buffer status report resource allocation via a DCI in the PDCCH. Once or if the UE has PUSCH resource adequate to send a buffer status report, the buffer status report is sent to the eNodeB and gives the eNodeB information regarding the amount of data in an uplink buffer or buffers at the UE. After receiving the buffer status report, the eNodeB can allocate a portion of the PUSCH resources to the sending UE in order to transmit some of its buffered uplink data and then inform the UE of the resource allocation via a DCI in the PDCCH. For example, presuming a UE has a connection with the eNodeB, the UE will first transmit a PUSCH resource request in the PUCCH in the form of a UCI. The UE will then monitor the PDCCH for an appropriate DCI, extract the details of the PUSCH resource allocation, and transmit uplink data , at first comprising a buffer status report, and/or later comprising a portion of the buffered data, in the allocated resources.

[0056] Although similar in structure to downlink subframes, uplink subframes have a different control structure to downlink subframes, in particular the upper 309 and lower 310 subcarriers/frequencies/resource blocks of an uplink subframe are reserved for control signaling rather than the initial symbols of a downlink subframe. Furthermore, although the resource allocation procedure for the downlink and uplink are relatively similar, the actual structure of the resources that may be allocated may vary due to the different characteristics of the OFDM and SC-FDM interfaces that are used in the downlink and uplink respectively. In OFDM each subcarrier is individually modulated and therefore it is not necessary that frequency/subcarrier allocation are contiguous however, in SC-FDM subcarriers are modulation in combination and therefore if efficient use of the available resources are to be made contiguous frequency allocations for each UE are preferable.

[0057] As a result of the above described wireless interface structure and operation, one or more UEs may communicate data to one another via a coordinating eNodeB, thus forming a conventional cellular telecommunications system. Although cellular communications system such as those based on the previously released LTE standards have been commercially successful, a number of disadvantages are associated with such centralised systems. For example, if two UEs which are in close proximity wish to communicate with each other, uplink and downlink resources sufficient to convey the data are required. Consequently, two portions of the system's resources are being used to convey a single portion of data. A second disadvantage is that an eNodeB is required if UEs, even when in close proximity, wish to communicate with one another. These limitations may be problematic when the system is experiencing high load or eNodeB coverage is not available, for instance in remote areas or when eNodeBs are not functioning correctly. Overcoming these limitations may increase both the capacity and efficiency of LTE networks but also lead to the creations of new revenue possibilities for LTE network operators.

References



[0058] 
  1. [1] LTE for UMTS: OFDMA and SC-FDMA Based Radio Access, Harris Holma and Antti Toskala, Wiley 2009, ISBN 978-0-470-99401-6.
  2. [2] RP-160671, "New SID Proposal: Study on New Radio Access Technology," NTT DOCOMO, R AN#71



Claims

1. A communications device (920) configured to transmit signals to and/or receive signals from an infrastructure equipment (901) of a wireless communications network, the communications device comprising
a receiver (924) configured to receive signals transmitted by the infrastructure equipment,
a transmitter (922) configured to transmit signals to the infrastructure equipment, and
a controller (926) configured to control the transmitter and the receiver, wherein the wireless communications network forms a wireless access interface comprising a plurality of communications resource elements formed by dividing a system bandwidth (940) in time and frequency, the wireless access interface comprising a plurality of transmission units, each of the transmission units comprising a predetermined number of the communications resource elements, and one or more transmission units are configured to form combined transmission units, which can be allocated by the wireless communications network to one or more communications devices for receiving signals from the infrastructure equipment or transmitting signals to the infrastructure equipment, and the controller is configured with the receiver
to receive an indication (910) from the infrastructure equipment of a plurality of transmission units forming a combined transmission unit (948) for the communications device, the plurality of transmission units including a first one or more transmission units (944) and a second one or more transmission units (946),
to receive an indication for each of the plurality of transmission units of the combined transmission unit of whether the transmission unit is for transmitting signals to the infrastructure equipment on the uplink, whether the transmission unit is for receiving signals from the infrastructure equipment on the downlink or whether the transmission unit is not to be used for transmitting or receiving signals, and
to receive an indication of a type of signals which are to be transmitted or received in each of the plurality of transmission units wherein
a type of signals to be transmitted or received in the first one or more transmission units differs from a type of signals to be transmitted or received in the second one or more transmission units, and
the indicated types of signals which are to be transmitted or received in the plurality of transmission units includes two or more of signals representing data, signals representing reference signals, signals representing synchronisation signals or an indication that no signals are to be transmitted.
 
2. A communications device as claimed in Claim 1, wherein the controller is configured with the receiver to receive an indication from the infrastructure equipment that the combined transmission unit is allocated repeatedly.
 
3. A communications device as claimed in Claim 2, wherein the combined transmission unit is allocated repeatedly for a predetermined number of times according to semi-persistent allocation.
 
4. A communications device as claims in Claim 2, wherein the combined transmission unit is allocated repeatedly until the receiver receives an indication from the infrastructure equipment terminating the allocation.
 
5. A communications device as claims in Claim 1, wherein the controller is configured with the receiver to receive an indication from the infrastructure equipment that the allocated combined transmission unit is changed to a different combined transmission unit providing a different configuration of one or more transmission units.
 
6. A communications device as claimed in Claim 1, wherein a temporal length of the combined transmission unit provides a frame structure for transmitting data represented as signals or receiving data represented as signals in each repeated occurrence of the combined transmission unit.
 
7. A communications device as claimed in Claim 1, wherein the combined transmission unit provides one or more transmission units for receiving signals from the infrastructure equipment on the downlink and one or more transmission units for transmitting signals on the uplink.
 
8. A communications device as claimed in Claim 7, wherein the one or more transmission units provided for receiving signals from the infrastructure equipment on the downlink are arranged together and before the one or more transmission units for transmitting signals on the uplink, the one or more downlink transmission units being configured for receiving a data unit and the one or more uplink transmission units being configured for transmitting an acknowledgement of successfully receiving the data unit or transmitting a negative acknowledgement of not successfully receiving the data unit.
 
9. A communications device as claimed in Claim 1, wherein the transmitter and the receiver are configured in accordance with a default combined transmission unit providing one or more transmission units for receiving the indication of the combined transmission unit.
 
10. A method of transmitting signals to an infrastructure equipment of a wireless communications network from a communications device and/or receiving signals at the communications device transmitted from the infrastructure equipment, the method comprising
receiving an indication from the infrastructure equipment of a combined transmission unit comprising a plurality of transmission units for the communications device, the plurality of transmission units including a first one or more transmission units (944) and a second one or more transmission units (946),
receiving an indication for each of the plurality of transmission units of the combined transmission unit of whether the transmission unit is for transmitting signals to the infrastructure equipment on the uplink, whether the transmission unit is for receiving signals transmitted from the infrastructure equipment on the downlink or whether the transmission unit is not to be used for transmitting signals or receiving signals, the plurality of transmission units being provided from a wireless access interface within a system bandwidth of the wireless communications network divided in time and frequency to form a plurality of communications resource elements, each transmission unit comprising one or more of the communications resource elements, and
receiving an indication of a type of signals which are to be transmitted or received in each of the plurality of transmission units wherein
a type of signals to be transmitted or received in the first one or more transmission units differs from a type of signals to be transmitted or received in the second one or more transmission units, and
the indicated types of signals which are to be transmitted or received in the plurality of transmission units includes two or more of signals representing data, signals representing reference signals, signals representing synchronisation signals or an indication that no signals are to be transmitted.
 
11. An infrastructure equipment (901) for forming part of a wireless communications network, the infrastructure equipment comprising
a receiver (902) configured to receive signals transmitted by one or more communications devices,
a transmitter (900) configured to transmit signals to the one or more communications devices, and a controller (904) configured to control the transmitter and the receiver and to allocate communications resource elements of a wireless access interface, the wireless access interface comprising a plurality of communications resource elements formed by dividing a system bandwidth in time and frequency, wherein the controller is configured to configure the wireless access interface as comprising a plurality of transmission units, each of the transmission units comprising a predetermined number of the communications resource elements, and one or more transmission units are configured to form combined transmission units, which can be allocated by the infrastructure equipment to one or more of the communications devices for receiving signals from the infrastructure equipment or transmitting signals to the infrastructure equipment, and the controller is configured with the transmitter
to transmit an indication to a communications device of a combined transmission unit comprising a plurality of transmission units for the communications device, the plurality of transmission units including a first one or more transmission units (944) and a second one or more transmission units (946),
to transmit an indication for each of the plurality of transmission units of the combined transmission unit of whether the transmission unit is for transmitting signals to the infrastructure equipment on the uplink, whether the transmission unit is for receiving signals from the infrastructure equipment on the downlink or whether the transmission unit is not to be used for transmitting signals,
to transmit an indication of a type of signals which are to be transmitted or received in each of the plurality of transmission units wherein
a type of signals to be transmitted or received in the first one or more transmission units differs from a type of signals to be transmitted or received in the second one or more transmission units, and
the indicated types of signals which are to be transmitted or received in the plurality of transmission units includes two or more of signals representing data, signals representing reference signals, signals representing synchronisation signals or an indication that no signals are to be transmitted.
 
12. A method of transmitting signals from an infrastructure equipment of a wireless communications network to a communications device and/or receiving signals at the infrastructure equipment from the communications device, the method comprising
transmitting an indication from the infrastructure equipment of a combined transmission unit comprising a plurality of transmission units for the communications device, the plurality of transmission units including a first one or more transmission units (944) and a second one or more transmission units (946),
transmitting an indication for each of the plurality of transmission units of the combined transmission unit of whether the transmission unit is for receiving signals from the communications device on the uplink or whether the transmission unit is for transmitting signals from the infrastructure equipment on the downlink, the plurality of transmission units being provided from a wireless access interface within a system bandwidth of the wireless communications network divided in time and frequency to form a plurality of communications resource elements, each of the transmission units being configured from a predetermined number of the communications resource elements,
to transmit an indication of a type of signals which are to be transmitted or received in each of the plurality of transmission units wherein
a type of signals to be transmitted or received in the first one or more transmission units differs from a type of signals to be transmitted or received in the second one or more transmission units, and
the indicated types of signals which are to be transmitted or received in the plurality of transmission units includes two or more of signals representing data, signals representing reference signals, signals representing synchronisation signals or an indication that no signals are to be transmitted.
 
13. A wireless communications network including an infrastructure equipment as claimed in Claim 11.
 


Ansprüche

1. Kommunikationsvorrichtung (920), die konfiguriert ist, Signale an ein Infrastrukturgerät (901) eines drahtlosen Kommunikationsnetzes zu senden und/oder Signale von einem Infrastrukturgerät (901) eines drahtlosen Kommunikationsnetzes zu empfangen, wobei die Kommunikationsvorrichtung Folgendes umfasst:

einen Empfänger (924), der konfiguriert ist, die durch das Infrastrukturgerät gesendeten Signale zu empfangen,

einen Sender (922), der konfiguriert ist, Signale an das Infrastrukturgerät zu senden, und

einen Controller (926), der konfiguriert ist, den Sender und den Empfänger zu steuern, wobei das drahtlose Kommunikationsnetz eine drahtlose Zugangsschnittstelle bildet, die mehrere Kommunikationsbetriebsmittelelemente umfasst, die durch das Aufteilen einer Systembandbreite (940) in der Zeit und der Frequenz gebildet werden, wobei die drahtlose Zugangsschnittstelle mehrere Übertragungseinheiten umfasst, jede der Übertragungseinheiten eine vorgegebene Anzahl von Kommunikationsbetriebsmittelelementen umfasst und eine oder mehrere Übertragungseinheiten konfiguriert sind, kombinierte Übertragungseinheiten zu bilden, die durch das drahtlose Kommunikationsnetz einer oder mehreren Kommunikationsvorrichtungen zum Empfangen von Signalen von dem Infrastrukturgerät oder zum Senden von Signalen an das Infrastrukturgerät zugewiesen werden können, wobei der Controller konfiguriert ist, mit dem Empfänger

eine Angabe (910) von dem Infrastrukturgerät mehrerer Übertragungseinheiten, die eine kombinierte Übertragungseinheit (948) für die Kommunikationsvorrichtung bilden, zu empfangen, wobei die mehreren Übertragungseinheiten eine erste oder mehrere erste Übertragungseinheiten (944) und eine zweite oder mehrere zweite Übertragungseinheiten (946) enthalten,

eine Angabe für jede der mehreren Übertragungseinheiten der kombinierten Übertragungseinheit zu empfangen, ob die Übertragungseinheit zum Senden von Signalen auf der Aufwärtsstrecke an das Infrastrukturgerät ist, ob die Übertragungseinheit zum Empfangen von Signalen von dem Infrastrukturgerät auf der Abwärtsstrecke ist oder ob die Übertragungseinheit zum Senden oder Empfangen von Signalen nicht verwendet werden soll, und

eine Angabe eines Typs der Signale zu empfangen, die in jeder der mehreren Übertragungseinheiten gesendet oder empfangen werden sollen, wobei

sich ein Typ der Signale, die in der einen ersten oder den mehreren ersten Übertragungseinheiten gesendet oder empfangen werden, sich von einem Typ der Signale unterscheidet, die in der einen zweiten oder den mehreren zweiten Übertragungseinheiten gesendet oder empfangen werden, und

die angegebenen Typen von Signalen, die in den mehreren Übertragungseinheiten gesendet oder empfangen werden sollen, zwei oder mehr der Signale, die Daten repräsentieren, der Signale, die Bezugssignale repräsentieren, der Signale, die Synchronisationssignale repräsentieren, oder einer Angabe, dass keine Signale gesendet werden sollen, enthalten.


 
2. Kommunikationsvorrichtung nach Anspruch 1, wobei der Controller konfiguriert ist, mit dem Empfänger eine Angabe von dem Infrastrukturgerät zu empfangen, dass die kombinierte Übertragungseinheit wiederholt zugewiesen wird.
 
3. Kommunikationsvorrichtung nach Anspruch 2, wobei die kombinierte Übertragungseinheit für eine vorgegebene Anzahl von Malen gemäß einer halbbeständigen Zuweisung wiederholt zugewiesen wird.
 
4. Kommunikationsvorrichtung nach Anspruch 2, wobei die kombinierte Übertragungseinheit wiederholt zugewiesen wird, bis der Empfänger eine Angabe von dem Infrastrukturgerät empfängt, die die Zuweisung beendet.
 
5. Kommunikationsvorrichtung nach Anspruch 1, wobei der Controller konfiguriert ist, mit dem Empfänger eine Angabe von dem Infrastrukturgerät zu empfangen, dass die zugewiesene kombinierte Übertragungseinheit zu einer anderen kombinierten Übertragungseinheit geändert wird, die eine andere Konfiguration aus einer oder mehreren Übertragungseinheiten bereitstellt.
 
6. Kommunikationsvorrichtung nach Anspruch 1, wobei eine zeitliche Länge der kombinierten Übertragungseinheit eine Rahmenstruktur zum Senden von Daten, die als Signale dargestellt sind, oder zum Empfangen von Daten, die als Signale dargestellt sind, in jedem wiederholten Auftreten der kombinierten Übertragungseinheit bereitstellt.
 
7. Kommunikationsvorrichtung nach Anspruch 1, wobei die kombinierte Übertragungseinheit eine oder mehrere Übertragungseinheiten zum Empfangen von Signalen von dem Infrastrukturgerät auf der Abwärtsstrecke und eine oder mehrere Übertragungseinheiten zum Senden von Signalen auf der Aufwärtsstrecke bereitstellt.
 
8. Kommunikationsvorrichtung nach Anspruch 7, wobei die eine oder die mehreren Übertragungseinheiten, die zum Empfangen von Signalen von dem Infrastrukturgerät auf der Abwärtsstrecke bereitgestellt sind, zusammen und vor der einen oder den mehreren Übertragungseinheiten zum Senden von Signalen auf der Aufwärtsstrecke angeordnet sind, die eine oder die mehreren Abwärtsstrecken-Übertragungseinheiten konfiguriert sind, eine Dateneinheit zu empfangen, und die eine oder die mehreren Aufwärtsstrecken-Übertragungseinheiten konfiguriert sind, eine Quittung des erfolgreichen Empfangens der Dateneinheit zu senden oder eine negative Quittung des nicht erfolgreichen Empfangens der Dateneinheit zu senden.
 
9. Kommunikationsvorrichtung nach Anspruch 1, wobei der Sender und der Empfänger in Übereinstimmung mit einer vorgegebenen kombinierten Übertragungseinheit konfiguriert sind, die eine oder mehrere Übertragungseinheiten zum Empfangen der Angabe der kombinierten Übertragungseinheit bereitstellt.
 
10. Verfahren zum Senden von Signalen an ein Infrastrukturgerät eines drahtlosen Kommunikationsnetzes von einer Kommunikationsvorrichtung und/oder zum Empfangen von Signalen, die von dem Infrastrukturgerät gesendet werden, an der Kommunikationsvorrichtung, wobei das Verfahren Folgendes umfasst
Empfangen einer Angabe von dem Infrastrukturgerät einer kombinierten Übertragungseinheit, die mehrere Übertragungseinheiten für die Kommunikationsvorrichtung umfasst, wobei die mehreren Übertragungseinheiten eine erste oder mehrere erste Übertragungseinheiten (944) und eine zweite oder mehrere zweite Übertragungseinheiten (946) enthalten,
Empfangen einer Angabe für jede der mehreren Übertragungseinheiten der kombinierten Übertragungseinheit, ob die Übertragungseinheit zum Senden von Signalen auf der Aufwärtsstrecke an das Infrastrukturgerät ist, ob die Übertragungseinheit zum Empfangen von Signalen, die von dem Infrastrukturgerät gesendet werden, auf der Abwärtsstrecke ist oder ob die Übertragungseinheit nicht zum Senden von Signalen oder Empfangen von Signalen verwendet werden soll, wobei die mehreren Übertragungseinheiten von einer drahtlosen Zugangsschnittstelle innerhalb einer Systembandbreite des drahtlosen Kommunikationsnetzes bereitgestellt werden, die in der Zeit und der Frequenz aufgeteilt wird, um mehrere Kommunikationsbetriebsmittelelemente zu bilden, wobei jede Übertragungseinheit eines oder mehrere der Kommunikationsbetriebsmittelelemente umfasst, und
Empfangen einer Angabe eines Typs von Signalen, die in jeder der mehreren Übertragungseinheiten gesendet oder empfangen werden sollen, wobei
sich ein Typ der Signale, die in der einen ersten oder den mehreren ersten Übertragungseinheiten gesendet oder empfangen werden, sich von einem Typ der Signale unterscheidet, die in der einen zweiten oder den mehreren zweiten Übertragungseinheiten gesendet oder empfangen werden, und
die angegebenen Typen von Signalen, die in den mehreren Übertragungseinheiten gesendet oder empfangen werden sollen, zwei oder mehr der Signale, die Daten repräsentieren, der Signale, die Bezugssignale repräsentieren, der Signale, die Synchronisationssignale repräsentieren, oder einer Angabe, dass keine Signale gesendet werden sollen, enthalten.
 
11. Infrastrukturgerät (901) zum Bilden eines Teils eines drahtlosen Kommunikationsnetzes, wobei das Infrastrukturgerät Folgendes umfasst
einen Empfänger (902), der konfiguriert ist, die durch eine oder mehrere Kommunikationsverrichtungen gesendeten Signale zu empfangen,
einen Sender (900), der konfiguriert ist, Signale an die eine oder die mehreren Kommunikationsvorrichtungen zu senden, und
einen Controller (904), der konfiguriert ist, den Sender und den Empfänger zu steuern und Kommunikationsbetriebsmittelelemente einer drahtlosen Zugangsschnittstelle zuzuweisen, wobei die drahtlose Zugangsschnittstelle mehrere Kommunikationsbetriebsmittelelemente umfasst, die durch das Aufteilen einer Systembandbreite in der Zeit und der Frequenz gebildet werden, wobei der Controller konfiguriert ist, die drahtlose Zugangsschnittstelle als mehrere Übertragungseinheiten umfassend zu konfigurieren, wobei jede der Übertragungseinheiten eine vorgegebene Anzahl der Kommunikationsbetriebsmittelelemente umfasst und eine oder mehrere Übertragungseinheiten konfiguriert sind, kombinierte Übertragungseinheiten zu bilden, die durch das Infrastrukturgerät einer oder mehreren der Kommunikationsvorrichtungen zum Empfangen von Signalen von dem Infrastrukturgerät oder zum Senden von Signalen an das Infrastrukturgerät zugewiesen werden können, wobei der Controller konfiguriert ist, mit dem Sender
eine Angabe an eine Kommunikationsvorrichtung einer kombinierten Übertragungseinheit zu senden, die mehrere Übertragungseinheiten für die Kommunikationsvorrichtung umfasst, wobei die mehreren Übertragungseinheiten eine erste oder mehrere erste Übertragungseinheiten (944) und eine zweite oder mehrere zweite Übertragungseinheiten (946) enthalten,
eine Angabe für jede der mehreren Übertragungseinheiten der kombinierten Übertragungseinheit zu senden, ob die Übertragungseinheit zum Senden von Signalen auf der Aufwärtsstrecke an das Infrastrukturgerät ist, ob die Übertragungseinheit zum Empfangen von Signalen von dem Infrastrukturgerät auf der Abwärtsstrecke ist oder ob die Übertragungseinheit nicht für das Senden von Signalen verwendet werden soll,
eine Angabe eines Typs von Signalen, die in jeder der mehreren Übertragungseinheiten gesendet oder empfangen werden sollen, zu senden, wobei
sich ein Typ der Signale, die in der einen ersten oder den mehreren ersten Übertragungseinheiten gesendet oder empfangen werden, sich von einem Typ der Signale unterscheidet, die in der einen zweiten oder den mehreren zweiten Übertragungseinheiten gesendet oder empfangen werden, und
die angegebenen Typen von Signalen, die in den mehreren Übertragungseinheiten gesendet oder empfangen werden sollen, zwei oder mehr der Signale, die Daten repräsentieren, der Signale, die Bezugssignale repräsentieren, der Signale, die Synchronisationssignale repräsentieren, oder einer Angabe, dass keine Signale gesendet werden sollen, enthalten.
 
12. Verfahren zum Senden von Signalen von einem Infrastrukturgerät eines drahtlosen Kommunikationsnetzes an eine Kommunikationsvorrichtung und/oder zum Empfangen von Signalen an dem Infrastrukturgerät von der Kommunikationsvorrichtung, wobei das Verfahren Folgendes umfasst
Senden einer Angabe von dem Infrastrukturgerät einer kombinierten Übertragungseinheit, die mehrere Übertragungseinheiten für die Kommunikationsvorrichtung umfasst, wobei die mehreren Übertragungseinheiten eine erste oder mehrere erste Übertragungseinheiten (944) und eine zweite oder mehrere zweite Übertragungseinheiten (946) enthalten,
Senden einer Angabe für jede der mehreren Übertragungseinheiten der kombinierten Übertragungseinheit, ob die Übertragungseinheit zum Empfangen von Signalen von der Kommunikationsvorrichtung auf der Aufwärtsstrecke ist oder ob die Übertragungseinheit zum Senden von Signalen von dem Infrastrukturgerät auf der Abwärtsstrecke ist, wobei die mehreren Übertragungseinheiten von einer drahtlosen Zugangsschnittstelle innerhalb einer Systembandbreite des drahtlosen Kommunikationsnetzes bereitgestellt werden, die in der Zeit und der Frequenz aufgeteilt wird, um mehrere Kommunikationsbetriebsmittelelemente zu bilden, wobei jede der Übertragungseinheiten aus einer vorgegebenen Anzahl der Kommunikationsbetriebsmittelelemente konfiguriert ist,
eine Angabe eines Typs der Signale, die in jeder der mehreren Übertragungseinheiten gesendet oder empfangen werden sollen, zu senden, wobei
sich ein Typ der Signale, die in der einen ersten oder den mehreren ersten Übertragungseinheiten gesendet oder empfangen werden, sich von einem Typ der Signale unterscheidet, die in der einen zweiten oder den mehreren zweiten Übertragungseinheiten gesendet oder empfangen werden, und
die angegebenen Typen von Signalen, die in den mehreren Übertragungseinheiten gesendet oder empfangen werden sollen, zwei oder mehr der Signale, die Daten repräsentieren, der Signale, die Bezugssignale repräsentieren, der Signale, die Synchronisationssignale repräsentieren, oder einer Angabe, dass keine Signale gesendet werden sollen, enthalten.
 
13. Drahtloses Kommunikationsnetz, das ein Infrastrukturgerät nach Anspruch 11 enthält.
 


Revendications

1. Dispositif (920) de communications configuré pour émettre des signaux à destination et/ou recevoir des signaux en provenance d'un équipement (901) d'infrastructure d'un réseau de communications sans fil, le dispositif de communications comportant un récepteur (924) configuré pour recevoir des signaux émis par l'équipement d'infrastructure,
un émetteur (922) configuré pour émettre des signaux vers l'équipement d'infrastructure, et
un contrôleur (926) configuré pour commander l'émetteur et le récepteur, le réseau de communications sans fil formant une interface d'accès sans fil comportant une pluralité d'éléments de ressources de communications formés en divisant une bande passante (940) de système en temps et en fréquence, l'interface d'accès sans fil comportant une pluralité d'unités de transmission, chacune des unités de transmission comportant un nombre prédéterminé des éléments de ressources de communications, et une ou plusieurs unités de transmission étant configurées pour former des unités de transmission combinées, qui peuvent être attribuées par le réseau de communications sans fil à un ou plusieurs dispositifs de communications pour recevoir des signaux en provenance de l'équipement d'infrastructure ou émettre des signaux vers l'équipement d'infrastructure, et le contrôleur étant configuré, avec le récepteur,
pour recevoir une indication (910) en provenance de l'équipement d'infrastructure d'une pluralité d'unités de transmission formant une unité (948) de transmission combinée pour le dispositif de communications, la pluralité d'unités de transmission incluant une ou plusieurs premières unités (944) de transmission et une ou plusieurs secondes unités (946) de transmission, pour recevoir une indication relative à chaque unité de la pluralité d'unités de transmission de l'unité de transmission combinée, indiquant si l'unité de transmission sert à émettre des signaux vers l'équipement d'infrastructure sur la liaison montante, si l'unité de transmission sert à recevoir des signaux en provenance de l'équipement d'infrastructure sur la liaison descendante ou si l'unité de transmission ne doit pas être utilisée pour émettre ou recevoir des signaux, et
pour recevoir une indication d'un type de signaux qui doivent être émis ou reçus dans chaque unité de la pluralité d'unités de transmission,
un type de signaux à émettre ou à recevoir dans la ou les premières unités de transmission différant d'un type de signaux à émettre ou à recevoir dans la ou les secondes unités de transmission, et
les types indiqués de signaux qui doivent être émis ou reçus dans la pluralité d'unités de transmission comprenant au moins deux types parmi des signaux représentant des données, des signaux représentant des signaux de référence, des signaux représentant des signaux de synchronisation ou une indication du fait qu'aucun signal ne doit être émis.
 
2. Dispositif de communications selon la revendication 1, le contrôleur étant configuré, avec le récepteur, pour recevoir une indication provenant de l'équipement d'infrastructure selon laquelle l'unité de transmission combinée est attribuée de façon répétée.
 
3. Dispositif de communications selon la revendication 2, l'unité de transmission combinée étant attribuée de façon répétée à un nombre prédéterminé de reprises selon une attribution semi-persistante.
 
4. Dispositif de communications selon la revendication 2, l'unité de transmission combinée étant attribuée de façon répétée jusqu'à ce que le récepteur reçoive une indication provenant de l'équipement d'infrastructure mettant fin à l'attribution.
 
5. Dispositif de communications selon la revendication 1, le contrôleur étant configuré, avec le récepteur, pour recevoir une indication provenant de l'équipement d'infrastructure selon laquelle l'unité de transmission combinée attribuée est remplacée par une unité de transmission combinée différente mettant en place une configuration différente d'une ou de plusieurs unités de transmission.
 
6. Dispositif de communications selon la revendication 1, une longueur temporelle de l'unité de transmission combinée mettant en place une structure de trames servant à émettre des données représentées comme des signaux ou à recevoir des données représentées comme des signaux dans chaque occurrence répétée de l'unité de transmission combinée.
 
7. Dispositif de communications selon la revendication 1, l'unité de transmission combinée mettant en place une ou plusieurs unités de transmission servant à recevoir des signaux en provenance de l'équipement d'infrastructure sur la liaison descendante et une ou plusieurs unités de transmission servant à émettre des signaux sur la liaison montante.
 
8. Dispositif de communications selon la revendication 7, l'unité ou les unités de transmission mises en place pour recevoir des signaux en provenance de l'équipement d'infrastructure sur la liaison descendante étant disposées ensemble et avant l'unité ou les unités de transmission servant à émettre des signaux sur la liaison montante, l'unité ou les unités de transmission en liaison descendante étant configurées pour recevoir une unité de données et l'unité ou les unités de transmission en liaison montante étant configurées pour émettre un acquittement de réussite de la réception de l'unité de données ou émettre un acquittement négatif de non-réussite de la réception de l'unité de données.
 
9. Dispositif de communications selon la revendication 1, l'émetteur et le récepteur étant configurés en fonction d'une unité de transmission combinée par défaut mettant en place une ou plusieurs unités de transmission servant à recevoir l'indication de l'unité de transmission combinée.
 
10. Procédé d'émission de signaux vers un équipement d'infrastructure d'un réseau de communications sans fil à partir d'un dispositif de communications et/ou de réception, au niveau du dispositif de communications, de signaux émis à partir de l'équipement d'infrastructure, le procédé comportant les étapes consistant à
recevoir en provenance de l'équipement d'infrastructure une indication d'une unité de transmission combinée comportant une pluralité d'unités de transmission pour le dispositif de communications, la pluralité d'unités de transmission incluant une ou plusieurs premières unités (944) de transmission et une ou plusieurs secondes unités (946) de transmission,
recevoir une indication relative à chaque unité de la pluralité d'unités de transmission de l'unité de transmission combinée, indiquant si l'unité de transmission sert à émettre des signaux vers l'équipement d'infrastructure sur la liaison montante, si l'unité de transmission sert à recevoir des signaux émis à partir de l'équipement d'infrastructure sur la liaison descendante ou si l'unité de transmission ne doit pas être utilisée pour émettre des signaux ou recevoir des signaux, la pluralité d'unités de transmission étant mise en place à partir d'une interface d'accès sans fil à l'intérieur d'une bande passante de système du réseau de communications sans fil divisée en temps et en fréquence pour former une pluralité d'éléments de ressources de communications, chaque unité de transmission comportant un ou plusieurs des éléments de ressources de communications, et recevoir une indication d'un type de signaux qui doivent être émis ou reçus dans chaque unité de la pluralité d'unités de transmission,
un type de signaux à émettre ou à recevoir dans la ou les premières unités de transmission différant d'un type de signaux à émettre ou à recevoir dans la ou les secondes unités de transmission, et
les types indiqués de signaux qui doivent être émis ou reçus dans la pluralité d'unités de transmission comprenant au moins deux types parmi des signaux représentant des données, des signaux représentant des signaux de référence, des signaux représentant des signaux de synchronisation ou une indication du fait qu'aucun signal ne doit être émis.
 
11. Équipement (901) d'infrastructure destiné à faire partie d'un réseau de communications sans fil, l'équipement d'infrastructure comportant un récepteur (902) configuré pour recevoir des signaux émis par un ou plusieurs dispositifs de communications, un émetteur (900) configuré pour émettre des signaux vers le ou les dispositifs de communications, et
un contrôleur (904) configuré pour commander l'émetteur et le récepteur et pour attribuer des éléments de ressources de communications d'une interface d'accès sans fil, l'interface d'accès sans fil comportant une pluralité d'éléments de ressources de communications formés en divisant un bande passante de système en temps et en fréquence, le contrôleur étant configuré pour configurer l'interface d'accès sans fil comme comportant une pluralité d'unités de transmission, chacune des unités de transmission comportant un nombre prédéterminé des éléments de ressources de communications, et une ou plusieurs unités de transmission étant configurées pour former des unités de transmission combinées, qui peuvent être attribuées par l'équipement d'infrastructure à un ou plusieurs des dispositifs de communications pour recevoir des signaux en provenance de l'équipement d'infrastructure ou émettre des signaux vers l'équipement d'infrastructure, et le contrôleur étant configuré, avec l'émetteur,
pour émettre une indication vers un dispositif de communications d'une unité de transmission combinée comportant une pluralité d'unités de transmission pour le dispositif de communications, la pluralité d'unités de transmission incluant une ou plusieurs premières unités (944) de transmission et une ou plusieurs secondes unités (946) de transmission,
pour émettre une indication relative à chaque unité de la pluralité d'unités de transmission de l'unité de transmission combinée, indiquant si l'unité de transmission sert à émettre des signaux vers l'équipement d'infrastructure sur la liaison montante, si l'unité de transmission sert à recevoir des signaux en provenance de l'équipement d'infrastructure sur la liaison descendante ou si l'unité de transmission ne doit pas être utilisée pour émettre des signaux,
pour émettre une indication d'un type de signaux qui doivent être émis ou reçus dans chaque unité de la pluralité d'unités de transmission,
un type de signaux à émettre ou à recevoir dans la ou les premières unités de transmission différant d'un type de signaux à émettre ou à recevoir dans la ou les secondes unités de transmission, et
les types indiqués de signaux qui doivent être émis ou reçus dans la pluralité d'unités de transmission comprenant au moins deux types parmi des signaux représentant des données, des signaux représentant des signaux de référence, des signaux représentant des signaux de synchronisation ou une indication du fait qu'aucun signal ne doit être émis.
 
12. Procédé d'émission de signaux à partir d'un équipement d'infrastructure d'un réseau de communications sans fil vers un dispositif de communications et/ou de réception de signaux au niveau de l'équipement d'infrastructure en provenance du dispositif de communications, le procédé comportant les étapes consistant à
émettre à partir de l'équipement d'infrastructure une indication d'une unité de transmission combinée comportant une pluralité d'unités de transmission pour le dispositif de communications, la pluralité d'unités de transmission incluant une ou plusieurs premières unités (944) de transmission et une ou plusieurs secondes unités (946) de transmission,
émettre une indication relative à chaque unité de la pluralité d'unités de transmission de l'unité de transmission combinée, indiquant si l'unité de transmission sert à recevoir des signaux en provenance du dispositif de communications sur la liaison montante ou si l'unité de transmission sert à émettre des signaux à partir de l'équipement d'infrastructure sur la liaison descendante, la pluralité d'unités de transmission étant mise en place à partir d'une interface d'accès sans fil à l'intérieur d'une bande passante de système du réseau de communications sans fil divisée en temps et en fréquence pour former une pluralité d'éléments de ressources de communications, chacune des unités de transmission étant configurée à partir d'un nombre prédéterminé des éléments de ressources de communications,
pour émettre une indication d'un type de signaux qui doivent être émis ou reçus dans chaque unité de la pluralité d'unités de transmission,
un type de signaux à émettre ou à recevoir dans la ou les premières unités de transmission différant d'un type de signaux à émettre ou à recevoir dans la ou les secondes unités de transmission, et
les types indiqués de signaux qui doivent être émis ou reçus dans la pluralité d'unités de transmission comprenant au moins deux types parmi des signaux représentant des données, des signaux représentant des signaux de référence, des signaux représentant des signaux de synchronisation ou une indication du fait qu'aucun signal ne doit être émis.
 
13. Réseau de communications sans fil comprenant un équipement d'infrastructure selon la revendication 11.
 




Drawing


























Cited references

REFERENCES CITED IN THE DESCRIPTION



This list of references cited by the applicant is for the reader's convenience only. It does not form part of the European patent document. Even though great care has been taken in compiling the references, errors or omissions cannot be excluded and the EPO disclaims all liability in this regard.

Non-patent literature cited in the description