WO2020031272A1 - Dispositif terminal, système de communication sans fil et procédé de transmission - Google Patents

Dispositif terminal, système de communication sans fil et procédé de transmission Download PDF

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Publication number
WO2020031272A1
WO2020031272A1 PCT/JP2018/029677 JP2018029677W WO2020031272A1 WO 2020031272 A1 WO2020031272 A1 WO 2020031272A1 JP 2018029677 W JP2018029677 W JP 2018029677W WO 2020031272 A1 WO2020031272 A1 WO 2020031272A1
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WIPO (PCT)
Prior art keywords
terminal device
group
resources
relocation
resource
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PCT/JP2018/029677
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English (en)
Japanese (ja)
Inventor
ジヤンミン ウー
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富士通株式会社
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Priority to PCT/JP2018/029677 priority Critical patent/WO2020031272A1/fr
Publication of WO2020031272A1 publication Critical patent/WO2020031272A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/30—Services specially adapted for particular environments, situations or purposes
    • H04W4/40—Services specially adapted for particular environments, situations or purposes for vehicles, e.g. vehicle-to-pedestrians [V2P]
    • H04W4/46—Services specially adapted for particular environments, situations or purposes for vehicles, e.g. vehicle-to-pedestrians [V2P] for vehicle-to-vehicle communication [V2V]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W84/00—Network topologies
    • H04W84/18—Self-organising networks, e.g. ad-hoc networks or sensor networks
    • H04W84/20—Master-slave selection or change arrangements

Definitions

  • the present invention relates to a terminal device, a wireless communication system, and a transmission method.
  • the traffic of mobile terminals occupies most of the network resources.
  • the traffic used by mobile terminals tends to increase in the future.
  • eMBB Enhanced Mobile Broadband
  • Massive MTC Machine Type Communications
  • URLLC Ultra-Reliable and Low Latency Communication
  • V2X Vehicle to Everything
  • V2X is a vehicle-to-vehicle (V2V) indicating inter-vehicle communication
  • V2P Vehicle-to-Pedestrian
  • a road infrastructure such as a car and a sign
  • V2I Vehicle-to-Infrastructure
  • the regulations regarding V2X are described in Non-Patent Document 1, for example.
  • FIG. 1 is a diagram illustrating an example of a resource arrangement in which a control channel PSCCH (Physical Sidelink Control CHannel) and a data channel PSSCH (Physical Sidelink Shared CHannel) indicated by oblique lines are adjacent in the frequency axis direction. is there.
  • PSCCH and PSSCH resources actually used for transmission are indicated by thick oblique lines and horizontal lines, respectively.
  • subframes SF1 to SF8 are shown in the time axis direction.
  • SCI Segmentlink Control Information
  • FIG. 2 is a diagram showing an example of resource allocation in which the PSCCH and the PSSCH indicated by oblique lines in the drawing are not adjacent to each other in the frequency axis direction. Also in FIG. 2, the PSCCH and PSSCH resources actually used for transmission are shown by thick oblique lines and horizontal lines, respectively, and subframes SF1 to SF8 are shown in the time axis direction. In FIG. 2, the corresponding PSCCH and PSSCH are not adjacent to each other, but the SCI related to the corresponding PSSCH is mapped to the PSCCH resource indicated by the thick hatching in the figure.
  • a method of allocating these resources there are, for example, a method in which the mobile communication system performs centralized control, and a method in which each terminal device implementing V2X performs autonomous control.
  • a system in which the mobile communication system performs centralized control is applicable when a terminal device implementing V2X is located in coverage of the mobile communication system, and is also referred to as mode 3.
  • a method in which each terminal device controls autonomously is applicable even if the terminal device does not exist in coverage of the mobile communication system, and is also referred to as mode 4.
  • mode 4 since communication between the terminal device and the mobile communication system for resource allocation is not performed, transmission delay when transmission data occurs in the terminal device is reduced, and a strict delay requirement is satisfied. Is possible.
  • each terminal device senses the frequency band used for V2X, and when transmission data is generated, excludes resources that are likely to be used by other terminal devices based on the sensing result.
  • a resource used for data transmission is selected. Specifically, for example, as shown in FIG. 3, when transmission data of a certain terminal device occurs at time T, this terminal device sets a selection window having a time width according to a delay time allowed for the transmission data. . Then, the terminal device excludes resources in the selection window that are likely to be used by other terminal devices based on the result of sensing up to time T. In FIG. 3, for example, resources indicated by thick oblique lines and horizontal lines are excluded. Then, the terminal device selects any of the resources remaining without being excluded in the selection window, maps transmission data to the selected resource, and transmits the transmission data.
  • V2X of mode 4 since each terminal device autonomously selects a resource to be used for data transmission, a plurality of terminal devices may select the same resource redundantly, and collision of used resources may occur. There is a problem that occurs. That is, in V2X, not only data that is transmitted periodically but also data that needs to be transmitted abruptly exist, and resources that are likely to be used by other terminal devices based on the result of sensing are excluded. Even in this case, the resources used for transmission may coincide with those of another terminal device.
  • the disclosed technology has been made in view of such a point, and provides a terminal device, a wireless communication system, and a transmission method that can reduce the possibility of collision of used resources and improve communication reliability. With the goal.
  • each terminal device of a group consisting of a plurality of terminal devices, and resources that are different in frequency or time, respectively, and resources that are pre-allocated to each terminal device of the group
  • a group management unit that holds group information indicating a corresponding relationship, and controls to transmit control channel information using resources allocated to its own device according to the group information held by the group management unit.
  • a wireless communication unit that transmits transmission data including the information of the control channel to a plurality of terminal devices forming the group.
  • the terminal device the wireless communication system, and the transmission method disclosed in the present application, it is possible to reduce a possibility of collision of used resources and improve communication reliability.
  • FIG. 1 is a diagram illustrating an example of a V2X resource arrangement.
  • FIG. 2 is a diagram illustrating another example of the V2X resource arrangement.
  • FIG. 3 is a diagram illustrating selection of a resource.
  • FIG. 4 is a diagram illustrating an example of a wireless communication system according to one embodiment.
  • FIG. 5 is a block diagram showing a configuration of the terminal device according to one embodiment.
  • FIG. 6 is a diagram illustrating a control channel according to one embodiment.
  • FIG. 7 is a diagram illustrating an example of a channel configuration according to one embodiment.
  • FIG. 8 is a diagram showing an example of the format of PCRLICH.
  • FIG. 9 is a flowchart illustrating a data transmission method according to one embodiment.
  • FIG. 10 is a flowchart illustrating a resource exchange method according to one embodiment.
  • FIG. 11 is a diagram illustrating a specific example of resource relocation.
  • FIG. 12 is a diagram illustrating a specific example of data transmission.
  • FIG. 4 is a diagram illustrating an example of a wireless communication system according to one embodiment.
  • the wireless communication system has a plurality of terminal devices provided in a plurality of vehicles.
  • the plurality of terminal devices belong to groups, respectively, and can be uniquely identified within each group. That is, the plurality of terminal devices shown in FIG. 4 belong to group # 1 or group # 2, and N (N is an integer of 1 or more) terminal devices belonging to group # 1 are referred to as v1 to vN in group # 1. It is identifiable.
  • the N terminal devices belonging to the group # 2 can be identified as v1 to vN in the group # 2.
  • the group is configured only from the terminal devices included in the automobile. However, pedestrians performing communication in V2X and terminal devices included in the road infrastructure may belong to the group.
  • Joining and leaving the group may be performed in any manner.
  • the group autonomously joins the group without any intervention such as a mobile communication system. to manage. For example, as a result of sensing a frequency band used for V2X communication, a terminal device that determines that no other terminal device is present in the vicinity forms a leader to form a group. Then, the terminal device that has become the leader starts reporting the group configuration information regarding the group, and the terminal device that has approached the terminal device of the leader joins the group according to the reported group configuration information.
  • a terminal device that has joined a group gives itself vacant identification information within the group. The identification information and the like of the members constituting the group are notified by the group configuration information transmitted from the terminal device of the leader.
  • Each of the terminal devices in the group can communicate with each other, and when transmitting data, multicast (groupcast) to all the terminal devices in the group as destinations. Therefore, data transmitted by one terminal device in the group can be received by all other terminal devices in the group. Normally, terminal devices that are close to each other form a group, so that data transmitted by one terminal device can be directly received by another terminal device. However, when terminal devices belonging to the same group are widely distributed, Alternatively, terminal devices in a group may relay data.
  • FIG. 5 is a block diagram showing a configuration of the terminal device 100 according to one embodiment.
  • the terminal device 100 illustrated in FIG. 5 includes a processor 110, a memory 120, and a wireless communication unit 130.
  • the processor 110 includes, for example, a CPU (Central Processing Unit), an FPGA (Field Programmable Gate Array) or a DSP (Digital Signal Processor), and controls the entire terminal device 100.
  • the processor 110 includes a group management unit 111, a used resource control unit 112, a transmission control unit 113, and a reception control unit 114.
  • the group management unit 111 manages a group to which the terminal device 100 belongs. That is, the group management unit 111 controls the joining and leaving of the terminal device 100 to and from the group, and holds the identification information and the used resources of the terminal devices belonging to the same group. Specifically, the group management unit 111 retains group information in which resources used by terminal devices belonging to the same group as control channels are stored in association with identification information of the terminal devices.
  • the group management unit 111 manages which terminal device has a cluster header (Cluster @ Header: CH) that is dynamically determined for each subframe in the group.
  • the CH as a representative terminal device in each subframe, exchanges resources in the subframe with resources in other subframes when the resource needs to be rearranged in each subframe. That is, the CH exchanges resources in the subframe it is responsible for and resources allocated to the terminal device having data to be transmitted urgently.
  • the group management unit 111 If the terminal device 100 is not a CH and the data to be transmitted urgently occurs, the group management unit 111 generates a data transmission request. Then, the group management unit 111 instructs the used resource control unit 112 to transmit the generated transmission request. On the other hand, when the terminal device 100 is a CH, the group management unit 111, upon receiving a transmission request from another terminal device, rearranges resources used by each terminal device as a control channel in response to the transmission request, Relocation information indicating the relocated resource is generated. Then, the group management unit 111 instructs the used resource control unit 112 to transmit the generated relocation information.
  • the used resource control unit 112 controls resources used when the terminal device 100 transmits data. Specifically, the used resource control unit 112 uses, as a control channel (PSCCH) resource, a resource determined in advance according to the identification information of the terminal device 100 within the group. That is, as shown in FIG. 6, the resources of the PSCCH are determined in advance so as to be arranged in the order of the identification information from v1 to vN in the frequency axis direction and then in the time axis direction.
  • the PSCCH of each terminal device has a size of two resource blocks (Resource @ Block: RB) in the frequency axis direction, and has a size of one subframe in the time axis direction.
  • the used resource control unit 112 controls to transmit the information of the PSCCH using the resource corresponding to the identification information in the group of the terminal devices 100.
  • the data channel PSSCH
  • the same subframe resources as the corresponding control channel PSCCH
  • the used resource control unit 112 controls to transmit the data of the PSSCH using the resource in the subframe used as the PSCCH of the terminal device 100.
  • the used resource control unit 112 transmits the transmission request or the relocation information to the PCRLICH (Physical) provided in the predetermined frequency band. Control so that transmission is performed using the resource of Control ⁇ Resource ⁇ Location ⁇ Indication ⁇ CHannel).
  • FIG. 7 is a diagram showing an example of the channel configuration according to the present embodiment.
  • the frequency bands indicated by oblique lines are resources of PCRLICH. PCRLICH will be described later with reference to FIG.
  • resources to be used are determined in advance according to the identification information of each terminal device.
  • the PSCCH resources are associated in advance with the identification information v1 to v15, respectively.
  • collision of resources used as control channels in the group does not occur, and the reliability of communication is improved. be able to.
  • the frequency band used as the PSSCH is divided into a plurality of (three in FIG. 7) subchannels, and data is mapped to each subchannel.
  • the sub-channels may be used one by one, or a plurality of sub-channels may be used collectively. Which sub-channel data of each terminal device is mapped to is indicated by SCI (Sidelink ⁇ Control ⁇ Information) of the corresponding PSCCH.
  • FIG. 7 illustrates a case where the control channel and the data channel are not adjacent to each other, a similar channel configuration can be adopted when the control channel and the data channel are adjacent to each other.
  • FIG. 8 is a diagram showing an example of the format of PCRLICH.
  • resources to be used are determined in advance according to the identification information of each terminal device. However, if data to be transmitted urgently occurs and data is not transmitted until a predetermined resource timing arrives, a data delay request may not be satisfied. Therefore, in the present embodiment, it is possible to rearrange resources using PCRLICH.
  • one subframe is divided into two slots, an AGC (Automatic Gain Controller) for automatically controlling a gain in each slot, and a reference signal for demodulation.
  • a guard section for preventing interference with DMRS (DeModulation Reference Signal) and adjacent slots is provided.
  • DMRS DeModulation Reference Signal
  • the used resource control unit 112 assigns a transmission request to the slot # 1 of the PCRLICH in the latest subframe. be able to.
  • the used resource control unit 112 re-enters the slot # 2 of the PCRLICH in the subframe where the transmission request is received. Allocation information can be assigned.
  • a plurality of terminal devices simultaneously transmit transmission requests to which orthogonal sequences (for example, a Zadoff-Chu sequence) are applied, and the CH terminal device receives transmission requests from the plurality of terminal devices. It is also possible. Further, in the slot # 2 of the PCRLICH, the terminal device of the CH can transmit the relocation information to a plurality of terminal devices. Furthermore, the PCRLICH does not necessarily need to be configured from the slot # 1 and the slot # 2, and the transmission request and the relocation information may be transmitted in different subframes.
  • the transmission request is transmitted and received in the slot # 1 of the PCRLICH, and the relocation information is transmitted and received in the slot # 2 of the same subframe. Can be grasped in a short time.
  • the terminal device that has transmitted the transmission request can transmit the data with a small delay by using the resource of the early timing indicated by the relocation information.
  • the transmission control unit 113 controls to transmit data using the resources controlled by the used resource control unit 112. That is, the transmission control unit 113 performs data encoding and modulation, and maps information to the PCRLICH, PSCCH, or PSSCH resource controlled by the used resource control unit 112. Then, the transmission control unit 113 multicasts (group-casts) the transmission data obtained by the mapping via the wireless communication unit 130.
  • the reception control unit 114 demodulates and decodes reception data received from another terminal device. At this time, first, the reception control unit 114 performs demodulation and decoding of the PCRLICH and the PSCCH, and when there is data addressed to the terminal device 100, performs demodulation and decoding of the corresponding PSSCH.
  • the terminal device 100 is a CH
  • the reception control unit 114 detects a transmission request from the PCRLICH of the subframe immediately before the subframe allocated to the terminal device 100. Then, when a transmission request is detected, the reception control unit 114 outputs the transmission request to the group management unit 111, and requests relocation of resources according to the transmission request.
  • the memory 120 includes, for example, a random access memory (RAM) or a read only memory (ROM), and stores information used by the processor 110 to execute processing.
  • RAM random access memory
  • ROM read only memory
  • the wireless communication unit 130 performs wireless transmission processing such as D / A (Digital / Analog) conversion and up-conversion on transmission data generated by the processor 110, and wirelessly transmits the data via an antenna.
  • the wireless communication unit 130 performs wireless reception processing such as down-conversion and A / D (Analog / Digital) conversion on received data wirelessly received via the antenna, and outputs the data to the processor 110.
  • the terminal device 100 joins the group, for example, at the time of startup or when entering the area where V2X communication is executed (step S101).
  • the terminal device 100 joins the group by receiving group configuration information broadcast from another terminal device that has already formed a group.
  • the terminal device 100 uses the unused identification information in the group as the identification information of the own device.
  • the group management unit 111 holds group information in which identification information of each terminal device in the group is associated with a resource used by each terminal device as a control channel. This allows the terminal device 100 to transmit a control channel using resources allocated in advance without causing resource collision with other terminal devices in the group.
  • the group management unit 111 monitors whether urgent data to be transmitted urgently occurs (step S102). If no urgent data is generated (No at Step S102), the used resource control unit 112 controls the terminal device 100 to transmit normal data using resources allocated in advance, and the transmission control unit 113 and the wireless communication unit The transmission data is transmitted by 130 (step S107).
  • the group management unit 111 instructs the used resource control unit 112 to generate a transmission request in a subframe immediately before the occurrence of the emergency data. Then, the used resource control unit 112 controls the transmission request using the resource of the slot # 1 of the PCRLICH of the latest subframe, and the transmission request is transmitted by the transmission control unit 113 and the wireless communication unit 130. (Step S103).
  • the transmission request is transmitted by multicast (group cast), it is received by all the terminal devices in the group other than the terminal device performing the transmission in the subframe, and the next subframe of these terminal devices is transmitted.
  • the terminal device which is a CH in the above executes resource relocation.
  • the resources in the subframe in which the resources are allocated to the terminal device of the CH are exchanged with the resources allocated to the terminal device 100 in advance. That is, the resource of the next subframe to which the terminal device 100 has transmitted the transmission request is allocated to the terminal device 100.
  • the position information is transmitted from the terminal device of the CH in slot # 2 of the PCRLICH of the same subframe as the transmission request.
  • ⁇ Relocation information is received by the wireless communication unit 130 and the reception control unit 114 of the terminal device 100 (step S104), and information on the resources exchanged by the resource relocation is notified to the group management unit 111.
  • the group management unit 111 and the used resource control unit 112 control transmission of emergency data using the notified exchange resource, and the transmission control unit 113 and the wireless communication unit 130 transmit the emergency data. Is performed (step S105). That is, the emergency data is transmitted in the subframe next to which the terminal device 100 has transmitted the transmission request, and it is possible to satisfy the emergency data delay request.
  • the group management unit 111 uses the group management unit 111 to identify each terminal device as identification information and a control channel.
  • the group information associated with the resources to be used is updated (step S106).
  • the transmission and reception of the transmission request and the relocation information using the PCRLICH causes the emergency data to be transmitted. Can be transmitted earlier to satisfy the delay requirement.
  • All terminal devices in the group including the terminal device 100 constantly demodulate and decode the PCRLICH and PSCCH, and can detect transmission requests transmitted from other terminal devices in the PCRLICH. Therefore, when another terminal device transmits a transmission request in PCRLICH, the transmission request is received by the terminal device 100 (step S201), and is demodulated and decoded by the reception control unit 114.
  • the group management unit 111 assigns one of the resources in the next subframe to the transmission source terminal of the transmission request.
  • An exchange resource to be exchanged with a resource allocated to the device is determined (step S202). That is, the switching resource in the subframe next to the subframe that has transmitted the transmission request is newly allocated to the terminal device that has transmitted the transmission request.
  • the resources exchanged here are control channel (PSCCH) resources allocated to each terminal device in advance. For the data channel (PSSCH), resources in the same subframe as the corresponding control channel are used, but resource allocation in subchannel units is not determined in advance. For this reason, when control channel resources are exchanged, each terminal device appropriately selects data channel resources within the same subframe as a new control channel.
  • the group management unit 111 generates relocation information indicating the allocation of a new resource of the control channel, and the used resource control unit 112 allocates the relocation information to the PCRLICH.
  • the used resource control unit 112 allocates relocation information to slot # 2 of the same subframe.
  • the relocation information is transmitted by the transmission control unit 113 and the wireless communication unit 130 (step S203).
  • the terminal device 100 executes the relocation of the resource as the CH, the resources allocated to the terminal devices in the group have been exchanged.
  • the group information associated with the resources to be used is updated (step S204).
  • FIG. 11 is a diagram illustrating resources of a control channel allocated to a group of terminal devices to which identification information v1 to v15 are assigned.
  • the upper part of FIG. 11 shows the resources before the rearrangement, and the lower part of FIG. 11 shows the resources after the rearrangement.
  • the terminal device to which the top resource of each of the subframes SF1 to SF8 is allocated is the CH. That is, in the upper diagram of FIG. 11, it is assumed that the terminal device to which the identification information v1, v4, v7, v10, and v13 is added is a CH in each subframe.
  • the resources of the subframes SF1 to SF5 are allocated to the terminal devices to which the identification information v1 to v15 are assigned for transmission of the control channel.
  • the resource of the subframe SF1 is allocated to the terminal device of the identification information v1 to v3
  • the resource of the subframe SF2 is allocated to the terminal device of the identification information v4 to v6
  • the resource of the subframe SF3 is allocated to the identification information v7.
  • the resources of the subframe SF4 are allocated to the terminal devices of the identification information v10 to v12
  • the resources of the subframe SF5 are allocated to the terminal devices of the identification information v13 to v15. The same applies to the subframe SF6 and thereafter.
  • the terminal device having the identification information v2 transmits a transmission request in the subframe SF2 immediately before the time T1.
  • the transmission request is transmitted in slot # 1 of PCRLICH.
  • the terminal device serving as the CH of the subframe SF3 next to the subframe SF2 detects the transmission request and executes the resource relocation.
  • the terminal device of the identification information v7 is the CH of the subframe SF3, the resource is rearranged by the terminal device of the identification information v7.
  • one of the resources of the subframe SF3 is determined as the exchange resource and is assigned to the terminal device of the identification information v2.
  • the resource allocated to the terminal device of the identification information v8 is determined as the exchange resource and is allocated to the terminal device of the identification information v2.
  • the resource assigned to the terminal device of the identification information v2 is assigned to the terminal device of the identification information v8. That is, the resources allocated to the terminal devices of the identification information v2 and v8 are exchanged.
  • the resources of the subframes SF3 and SF8 are allocated to the terminal device of the identification information v2, and the resources of the subframe SF6 are allocated to the terminal device of the identification information v8. Resources are allocated. Then, resources are allocated to all terminal devices in the group, for example, in units of the arrangement of the subframes SF3 to SF7.
  • the relocation information on the relocated resources is transmitted by the terminal device of the identification information v7 in the same subframe SF2 as the transmission request. Therefore, the terminal device having the identification information v2 receives the relocation information in the subframe SF2 and transmits the emergency data in the subsequent subframe SF3. Further, the terminal device having the identification information v8 receives the relocation information in the subframe SF2, and suppresses data transmission in the subsequent subframe SF3.
  • the terminal device having the identification information v2 can transmit the control channel without resource collision using the resources of the subframe SF3. Further, the terminal device having the identification information v2 can transmit emergency data in the same subframe SF3 as the control channel. As a result, the urgent data can be transmitted with a small delay, and the urgent data delay request can be satisfied.
  • the information of the control channel transmitted by the terminal device of the identification information v2 can be correctly received by another terminal device. Therefore, when the transmission of the emergency data by the terminal device of the identification information v2 is transmitted to the other terminal device by the information of the control channel, the other terminal device transmits the emergency data repeatedly transmitted at a predetermined timing from the initial transmission. Therefore, the resources of the control channel and the data channel are transferred to the terminal device of the identification information v2. That is, in the example shown in FIG.
  • the terminal device of the identification information v14 yields the control channel resource and the identification information v13,
  • the v15 terminal device suppresses the use of the data channel resource.
  • the terminal device of the identification information v2 can obtain a transmission opportunity without collision of resources on both the control channel and the data channel.
  • the other terminal devices do not have to suppress the use of resources of all sub-channels during repetitive transmission. . That is, in FIG. 12, the terminal device having the identification information items v13 and v15 may transmit data using the resources of the sub-channels SC2 and SC3 while suppressing the use of the resources of the sub-channel SC1.
  • a group of terminal devices that execute V2X communication is formed, and resources to be used as control channels are allocated to each of the terminal devices in the group in advance. Also, a channel for resource relocation is provided, and when a terminal device that has generated data to be transmitted urgently transmits a transmission request using this channel, the terminal device serving as a cluster header relocates the resource. Deploy. Therefore, resource collision on the control channel can be prevented, and the possibility of resource collision on the data channel transmitted in the same subframe as the control channel can be reduced. Further, even when emergency data is generated, by transmitting the emergency data with the relocated resources, the emergency data can be transmitted early to satisfy the delay request. In other words, it is possible to reduce the possibility of collision of used resources and improve communication reliability.
  • the terminal device serving as a CH in the immediately following subframe executes resource relocation.
  • the executing terminal device is not limited to this. That is, any terminal device other than the terminal device transmitting the signal in the subframe in which the transmission request is transmitted can receive the transmission request. Such a terminal device may receive a transmission request as a CH and execute resource relocation.
  • the representative terminal device in each subframe of the group is referred to as a “cluster header (CH)”, and the channel for resource relocation control is referred to as a “PCRLICH”. It is needless to say that the present invention is not limited to this.

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  • Computer Networks & Wireless Communication (AREA)
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Abstract

Selon la présente invention, un dispositif terminal (100) comprend : une unité de gestion de groupe (111) pour contenir des informations de groupe qui indiquent une relation de correspondance entre chaque dispositif terminal d'un groupe configuré à partir d'une pluralité de dispositifs terminaux, et des ressources, chacune étant différente en termes de fréquence ou de temps et attribuée à chaque dispositif terminal du groupe à l'avance ; une unité de commande (112) pour effectuer une commande de telle sorte que des informations se rapportant à un canal de commande sont transmises à l'aide de la ressource attribuée au dispositif local (100) conformément aux informations de groupe conservées par l'unité de gestion de groupe (111); et une unité de communication sans fil (130) pour transmettre des données de transmission qui comprennent les informations relatives à un canal de commande à une pluralité de dispositifs terminaux constituant le groupe.
PCT/JP2018/029677 2018-08-07 2018-08-07 Dispositif terminal, système de communication sans fil et procédé de transmission WO2020031272A1 (fr)

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CATT: "Discussion on physical channel types for D2D communication", 3GPP TSG-RAN WG1#74B R1-134112, 28 September 2013 (2013-09-28), XP050717303 *
CATT: "Discussion on physical channel types for D2D communication", 3GPP TSG-RAN WG1#75 R1-135092, 1 November 2013 (2013-11-01), XP050750592 *
FUJITSU: "Cluster-based unified approach to D2D direct communication", 3GPP TSG-RAN WG1#74 R1-133140, 10 August 2013 (2013-08-10), XP050716354 *

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