WO2021090459A1 - Terminal et procédé de communication - Google Patents

Terminal et procédé de communication Download PDF

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Publication number
WO2021090459A1
WO2021090459A1 PCT/JP2019/043773 JP2019043773W WO2021090459A1 WO 2021090459 A1 WO2021090459 A1 WO 2021090459A1 JP 2019043773 W JP2019043773 W JP 2019043773W WO 2021090459 A1 WO2021090459 A1 WO 2021090459A1
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Prior art keywords
terminal
harq
data
source
psfch
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PCT/JP2019/043773
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English (en)
Japanese (ja)
Inventor
翔平 吉岡
聡 永田
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株式会社Ｎｔｔドコモ
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Priority to PCT/JP2019/043773 priority Critical patent/WO2021090459A1/fr
Publication of WO2021090459A1 publication Critical patent/WO2021090459A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/02—Traffic management, e.g. flow control or congestion control
    • H04W28/04—Error control
    • 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
    • H04W92/00—Interfaces specially adapted for wireless communication networks
    • H04W92/16—Interfaces between hierarchically similar devices
    • H04W92/18—Interfaces between hierarchically similar devices between terminal devices

Definitions

  • the present invention relates to a terminal and a communication method in a wireless communication system.
  • LTE Long Term Evolution
  • LTE-A Long Term Evolution Advanced
  • NR New Radio
  • 5G New Radio
  • Non-Patent Document 1 Non-Patent Document 1
  • D2D reduces the traffic between the terminal and the base station, and enables communication between the terminals even if the base station becomes unable to communicate in the event of a disaster or the like.
  • D2D is referred to as "sidelink", but in the present specification, D2D, which is a more general term, is used. However, in the description of the embodiment described later, a side link is also used if necessary.
  • D2D communication includes D2D discovery (also called D2D discovery) for discovering other terminals that can communicate, and D2D communication (D2D direct communication, D2D communication, direct communication between terminals) for direct communication between terminals. It is also roughly divided into communication, etc.).
  • D2D communication, D2D discovery, etc. are not particularly distinguished, they are simply referred to as D2D.
  • a signal transmitted / received in D2D is called a D2D signal.
  • Various use cases of services related to V2X (Vehicle to Everything) in NR are being studied (for example, Non-Patent Document 2).
  • HARQ Hybrid automatic repeat request
  • PSFCH Physical Sidelink Feedback Channel
  • the present invention has been made in view of the above points, and an object of the present invention is to specify the operation of terminals when HARQ (Hybrid automatic repeat request) feedback collides in direct communication between terminals, and to perform appropriate HARQ control. To do.
  • HARQ Hybrid automatic repeat request
  • a communication unit that establishes a plurality of RRC (Radio Resource Control) connections established for a pair of a source ID and a destination ID with another terminal.
  • RRC Radio Resource Control
  • a receiving unit that receives a plurality of data and a channel that transmits a HARQ (Hybrid automatic repeat request) response corresponding to the plurality of data collide with each other in at least one of a time domain, a frequency domain, or a code domain, the plurality of data.
  • a control unit that determines an operation related to the response based on at least one of a source ID and a destination ID associated with each of the data of the above, and a HARQ response is transmitted to the other terminal based on the determined operation.
  • a terminal having a transmitting unit is provided.
  • HARQ Hybrid automatic repeat request
  • V2X It is a figure for demonstrating V2X. It is a figure for demonstrating the example (1) of the transmission mode of V2X. It is a figure for demonstrating the example (2) of the transmission mode of V2X. It is a figure for demonstrating the example (3) of the transmission mode of V2X. It is a figure for demonstrating the example (4) of the transmission mode of V2X. It is a figure for demonstrating the example (5) of the transmission mode of V2X. It is a figure for demonstrating the example (1) of the communication type of V2X. It is a figure for demonstrating the example (2) of the communication type of V2X. It is a figure for demonstrating the example (3) of the communication type of V2X. It is a figure which shows the operation example (1) in embodiment of this invention.
  • LTE Long Term Evolution
  • NR Universal Terrestrial Radio Access
  • LAN Local Area Network
  • the duplex system may be a TDD (Time Division Duplex) system, an FDD (Frequency Division Duplex) system, or other system (for example, Flexible Duplex, etc.). Method may be used.
  • TDD Time Division Duplex
  • FDD Frequency Division Duplex
  • Method may be used.
  • "configuring" the radio parameter or the like may mean that a predetermined value is set in advance (Pre-configure), or the base station 10 or The radio parameter notified from the terminal 20 may be set.
  • FIG. 1 is a diagram for explaining V2X.
  • V2X Vehicle to Everything
  • eV2X enhanced V2X
  • FIG. 1 V2X is a part of ITS (Intelligent Transport Systems), V2V (Vehicle to Vehicle) which means a communication mode between vehicles, and a roadside installed between a vehicle and a roadside.
  • ITS Intelligent Transport Systems
  • V2V Vehicle to Vehicle
  • V2I Vehicle to Infrastructure
  • V2N Vehicle to Network
  • V2P Vehicle to Pedestrian
  • V2X using LTE or NR cellular communication and terminal-to-terminal communication is being studied.
  • V2X using cellular communication is also referred to as cellular V2X.
  • NR V2X studies are underway to realize large capacity, low delay, high reliability, and Quality of Service (QoS) control.
  • LTE or NR V2X it is expected that studies not limited to 3GPP specifications will be promoted in the future. For example, ensuring interoperability, reducing costs by implementing higher layers, using or switching between multiple RATs (Radio Access Technology), supporting regulations in each country, data acquisition, distribution, database management, and LTE or NR V2X platform. It is expected that the usage method will be examined.
  • RATs Radio Access Technology
  • the communication device is mounted on the vehicle, but the embodiment of the present invention is not limited to this mode.
  • the communication device may be a terminal held by a person, the communication device may be a device mounted on a drone or an aircraft, and the communication device may be a base station, an RSU, a relay station (relay node), or the like. It may be a terminal or the like having a scheduling ability.
  • SL may be distinguished based on any or combination of UL (Uplink) or DL (Downlink) and the following 1) -4). Further, SL may have another name. 1) Time domain resource allocation 2) Frequency domain resource allocation 3) Reference synchronization signal (including SLSS (Sidelink Synchronization Signal)) 4) Reference signal used for path loss measurement for transmission power control
  • SL or UL OFDM Orthogonal Frequency Division Multiplexing
  • CP-OFDM Cyclic-Prefix OFDM
  • DFT-S-OFDM Discrete Fourier Transform-Spread-OFDM
  • Transform Precoded OFDM Transferformed Any of the above OFDM may be applied.
  • Mode 3 and Mode 4 are specified regarding the allocation of SL resources to the terminal 20.
  • transmission resources are dynamically allocated by DCI (Downlink Control Information) transmitted from the base station 10 to the terminal 20.
  • DCI Downlink Control Information
  • SPS SemiPersistent Scheduling
  • Mode 4 the terminal 20 autonomously selects a transmission resource from the resource pool.
  • the slot in the embodiment of the present invention may be read as a symbol, a mini slot, a subframe, a wireless frame, and a TTI (Transmission Time Interval).
  • the cell in the embodiment of the present invention may be read as a cell group, a carrier component, a BWP, a resource pool, a resource, a RAT (Radio Access Technology), a system (including a wireless LAN), or the like.
  • FIG. 2 is a diagram for explaining an example (1) of the transmission mode of V2X.
  • the base station 10 transmits the sidelink scheduling to the terminal 20A.
  • the terminal 20A transmits PSCCH (Physical Sidelink Control Channel) and PSCH (Physical Sidelink Shared Channel) to the terminal 20B based on the received scheduling (step 2).
  • the transmission mode of the side link communication shown in FIG. 2 may be referred to as the side link transmission mode 3 in LTE.
  • LTE sidelink transmission mode 3 Uu-based sidelink scheduling is performed.
  • Uu is a wireless interface between UTRAN (Universal Terrestrial Radio Access Network) and UE (User Equipment).
  • the transmission mode of the side link communication shown in FIG. 2 may be referred to as the side link transmission mode 1 in NR.
  • FIG. 3 is a diagram for explaining an example (2) of the transmission mode of V2X.
  • terminal 20A transmits PSCCH and PSCH to terminal 20B using autonomously selected resources.
  • the transmission mode of the side link communication shown in FIG. 3 may be referred to as the side link transmission mode 4 in LTE.
  • the UE In the side link transmission mode 4 in LTE, the UE itself executes resource selection.
  • FIG. 4 is a diagram for explaining an example (3) of the transmission mode of V2X.
  • terminal 20A transmits PSCCH and PSCH to terminal 20B using autonomously selected resources.
  • terminal 20B uses autonomously selected resources to transmit PSCCH and PSCH to terminal 20A (step 1).
  • the transmission mode of the side link communication shown in FIG. 4 may be referred to as the side link transmission mode 2a in NR.
  • the terminal 20 In the side link transmission mode 2 in NR, the terminal 20 itself executes resource selection.
  • FIG. 5 is a diagram for explaining an example (4) of the transmission mode of V2X.
  • the base station 10 transmits the side link grant to the terminal 20A via the RRC (Radio Resource Control) setting.
  • the terminal 20A transmits the PSCH to the terminal 20B based on the received resource pattern (step 1).
  • the transmission mode of the side link communication shown in FIG. 5 may be referred to as the side link transmission mode 2c in NR.
  • FIG. 6 is a diagram for explaining an example (5) of the transmission mode of V2X.
  • the terminal 20A transmits the sidelink scheduling to the terminal 20B via the PSCCH.
  • the terminal 20B transmits the PSCH to the terminal 20A based on the received scheduling (step 2).
  • the transmission mode of the side link communication shown in FIG. 6 may be referred to as the side link transmission mode 2d in NR.
  • FIG. 7 is a diagram for explaining an example (1) of the communication type of V2X.
  • the sidelink communication type shown in FIG. 7 is unicast.
  • Terminal 20A transmits PSCCH and PSCH to terminal 20.
  • the terminal 20A unicasts to the terminal 20B and also unicasts to the terminal 20C.
  • FIG. 8 is a diagram for explaining an example (2) of the communication type of V2X.
  • the sidelink communication type shown in FIG. 8 is group cast.
  • Terminal 20A transmits PSCCH and PSCH to the group to which one or more terminals 20 belong.
  • the group includes a terminal 20B and a terminal 20C, and the terminal 20A performs a group cast to the group.
  • FIG. 9 is a diagram for explaining an example (3) of the communication type of V2X.
  • the sidelink communication type shown in FIG. 9 is broadcast.
  • Terminal 20A transmits PSCCH and PSCH to one or more terminals 20.
  • terminal 20A broadcasts to terminal 20B, terminal 20C and terminal 20D.
  • the terminal 20A shown in FIGS. 7 to 9 may be referred to as a header UE.
  • HARQ Hybrid automatic repeat request
  • SFCI Segmentlink Feedback Control Information
  • PSFCH Physical Sidelink Feedback Channel
  • PSFCH is used in the transmission of HARQ-ACK on the side link, but this is an example.
  • PSCCH may be used to transmit HARQ-ACK on the side link
  • PSCH may be used to transmit HARQ-ACK on the side link
  • other channels may be used. It may be used to transmit HARQ-ACK on the side link.
  • HARQ-ACK all the information reported by the terminal 20 in HARQ will be referred to as HARQ-ACK.
  • This HARQ-ACK may be referred to as HARQ-ACK information.
  • a codebook applied to the HARQ-ACK information reported from the terminal 20 to the base station 10 or the like is called a HARQ-ACK codebook.
  • the HARQ-ACK codebook defines a bit string of HARQ-ACK information.
  • NACK is also transmitted by "HARQ-ACK".
  • FIG. 10 is a diagram showing an operation example (1) in the embodiment of the present invention.
  • the wireless communication system according to the embodiment of the present invention has a terminal 20A and a terminal 20B.
  • FIG. 10 shows terminals 20A and terminals 20B as examples.
  • terminal 20 terminal 20
  • terminal 20B terminal 20
  • user device terminal 20
  • FIG. 10 shows a case where both the terminal 20A and the terminal 20B are within the coverage of the cell as an example, the operation in the embodiment of the present invention can be applied even when the terminal 20B is outside the coverage.
  • the terminal 20 is a device mounted on a vehicle such as an automobile, and has a cellular communication function as a UE in LTE or NR and a side link function. There is.
  • the terminal 20 may be a general mobile terminal (smartphone or the like). Further, the terminal 20 may be an RSU.
  • the RSU may be a UE type RSU having a UE function or a gNB type RSU having a base station device function.
  • the terminal 20 does not have to be a device in one housing. For example, even when various sensors are dispersedly arranged in the vehicle, the device including the various sensors is the terminal 20.
  • the processing content of the transmission data of the side link of the terminal 20 is basically the same as the processing content of UL transmission in LTE or NR.
  • the terminal 20 scrambles and modulates the code word of the transmission data to generate complex-valued symbols, maps the complex-valued symbols (transmission signal) to one or two layers, and performs precoding. Then, precoded complex-valued symbols are mapped to resource elements to generate a transmission signal (example: complex-valued time-domain SC-FDMA signal), which is transmitted from each antenna port.
  • the base station 10 has a cellular communication function as a base station in LTE or NR, and a function for enabling communication of the terminal 20 in the present embodiment (example: resource pool setting, resource allocation, etc.). have. Further, the base station 10 may be an RSU (gNB type RSU).
  • RSU gNB type RSU
  • the signal waveform used by the terminal 20 for SL or UL may be OFDMA, SC-FDMA, or other signal waveform. It may be.
  • step S101 the terminal 20A autonomously selects the resources to be used for PSCCH and PSCH from the resource selection window having a predetermined period.
  • the resource selection window may be set from the base station 10 to the terminal 20.
  • step S102 and step S103 the terminal 20A transmits SCI (Sidelink Control Information) by PSCCH and SL data by PSCH using the resource autonomously selected in step S101.
  • the terminal 20A may transmit the SCI (PSCCH) using the same time resource as the PSCH time resource and using the frequency resource adjacent to the PSCH frequency resource.
  • the terminal 20B receives the SCI (PSCCH) and SL data (PSSCH) transmitted from the terminal 20A.
  • the SCI received by the PSCCH may include information on the resources of the PSFCH for the terminal 20B to transmit the HARQ-ACK for receiving the data.
  • the terminal 20A may include the information of the resource selected autonomously in the SCI and transmit it.
  • step S104 the terminal 20B transmits HARQ-ACK for the received data to the terminal 20A using the resource of the PSFCH specified by the received SCI.
  • step S105 the terminal 20A retransmits the PSCCH and PSCH to the terminal 20B when the HARQ-ACK received in step S104 indicates that the retransmission is requested, that is, when it is NACK (negative response).
  • Terminal 20A may resend PSCCH and PSCH using autonomously selected resources.
  • steps S104 and S105 may not be executed.
  • FIG. 11 is a diagram showing an operation example (2) in the embodiment of the present invention. Blind retransmissions without HARQ control may be performed to improve transmission success rate or reach.
  • step S201 the terminal 20A autonomously selects the resources to be used for PSCCH and PSCH from the resource selection window having a predetermined period.
  • the resource selection window may be set from the base station 10 to the terminal 20.
  • the terminal 20A transmits SCI by PSCCH and SL data by PSCH using the resource autonomously selected in step S201.
  • the terminal 20A may transmit the SCI (PSCCH) using the same time resource as the PSCH time resource and using the frequency resource adjacent to the PSCH frequency resource.
  • step S204 the terminal 20A retransmits the SCI by PSCCH and the SL data by PSCH to the terminal 20B by using the resource autonomously selected in step S201.
  • the retransmission in step S204 may be executed a plurality of times.
  • step S204 may not be executed.
  • FIG. 12 is a diagram showing an operation example (3) in the embodiment of the present invention.
  • the base station 10 may perform side link scheduling. That is, the base station 10 may determine the resource of the side link used by the terminal 20 and transmit the information indicating the resource to the terminal 20. Further, when HARQ control is applied, the base station 10 may transmit information indicating the resources of the HSFCH to the terminal 20.
  • step S301 the base station 10 performs SL scheduling by sending DCI (Downlink Control Information) to the terminal 20A by PDCCH.
  • DCI Downlink Control Information
  • the DCI for SL scheduling will be referred to as SL scheduling DCI.
  • step S301 it is assumed that the base station 10 also transmits DCI for DL scheduling (which may be called DL allocation) to the terminal 20A by PDCCH.
  • DCI for DL scheduling (which may be called DL allocation)
  • the DCI for DL scheduling will be referred to as DL scheduling DCI.
  • the terminal 20A that has received the DL scheduling DCI receives the DL data by PDSCH using the resource specified by the DL scheduling DCI.
  • step S302 and step S303 the terminal 20A transmits SCI (Sidelink Control Information) by PSCCH and SL data by PSCH using the resource specified by SL scheduling DCI.
  • SCI Servicelink Control Information
  • SL scheduling DCI only PSCH resources may be specified.
  • the terminal 20A may transmit the SCI (PSCCH) with the same time resource as the PSCH time resource and using the frequency resource adjacent to the PSCH frequency resource.
  • the terminal 20B receives the SCI (PSCCH) and SL data (PSSCH) transmitted from the terminal 20A.
  • the SCI received by the PSCCH includes information on the PSFCH resource for the terminal 20B to transmit the HARQ-ACK for receiving the data.
  • the resource information is included in the DL scheduling DCI or SL scheduling DCI transmitted from the base station 10 in step S301, and the terminal 20A acquires the resource information from the DL scheduling DCI or SL scheduling DCI and SCI. Include in. Alternatively, the DCI transmitted from the base station 10 may not include the information of the resource, and the terminal 20A may autonomously include the information of the resource in the SCI and transmit the information.
  • step S304 the terminal 20B transmits HARQ-ACK for the received data to the terminal 20A using the resource of the PSFCH specified by the received SCI.
  • the terminal 20A has, for example, a PUCCH resource designated by the DL scheduling DCI (or the SL scheduling DCI) at the timing specified by the DL scheduling DCI (or SL scheduling DCI) (for example, slot unit timing).
  • the HARQ-ACK is transmitted using the above, and the base station 10 receives the HARQ-ACK.
  • the HARQ-ACK codebook may include HARQ-ACK received from the terminal 20B and HARQ-ACK for DL data. However, HARQ-ACK for DL data is not included when DL data is not assigned.
  • steps S304 and S305 may not be executed.
  • a plurality of HARQ-ACKs may collide.
  • the terminal 20B may multiplex the HARQ-ACKs or drop some of them based on the priority. Good.
  • the terminal 20B may drop some of the HARQ-ACKs based on the priority.
  • PSFCH transmission or PSFCH reception to be executed based on the priority may be selected.
  • the priority of PSFCH transmission or reception of PSFCH may be at least based on the notification of priority by the associated PSCCH and / or PSSCH.
  • the priority of PSFCH transmission or PSFCH reception may be based on at least one of transmission and reception, cast type, HARQ state, HARQ-ACK option, or retransmission count, or may be determined by the UE implementation.
  • N PSFCH transmissions to be transmitted based on the priority may be selected, and PSFCHs other than the selected N PSFCHs may be dropped. That is, when the received PSCCH and / or PSCH is M (M> N), MN PSFCH may be dropped and N PSFCH may be transmitted.
  • the priority of PSFCH transmission may be at least based on the notification of priority by the associated PSCCH and / or PSSCH.
  • the priority of PSFCH transmission may be based on at least one of cast type, HARQ state, HARQ-ACK option or retransmission count, or may be determined by the UE implementation.
  • PSFCH may be multiplexed and transmitted, or N PSFCH transmissions to be transmitted based on the priority are selected, and the selected N is selected. Other PSFCHs may be dropped.
  • FIG. 13 is a diagram showing an example of a connection form in the embodiment of the present invention. As shown in FIG. 13, in direct communication between terminals, a plurality of links with different source IDs and destination IDs may be configured between the same pair of terminals 20.
  • the above-mentioned plurality of links may be links in which a plurality of unicasts are executed between the same pair of terminals 20. That is, the terminal 20 may establish a link in which a plurality of unicasts are executed with another terminal 20.
  • the link may be defined as a PC5-RRC connection, which is a logical connection between a pair of source L2ID and destination L2ID.
  • the PC 5 corresponds to an interface between a pair of terminals 20 on a network architecture in LTE or NR.
  • the L2ID corresponds to the identifier in layer 2.
  • the source ID and destination ID may be the L1 ID, which is an identifier in layer 1.
  • the terminal 20 may perform a specific operation in response to a PSFCH collision in a plurality of PC5-RRC connections having different source ID and destination ID pairs.
  • FIG. 14 is a flowchart for explaining an operation example (1) at the time of a PSFCH collision according to the embodiment of the present invention.
  • N PSFCH transmissions to be transmitted without multiplexing are selected based on the priority, and N selected PSFCH transmissions are selected.
  • PSFCH other than may be dropped.
  • the corresponding HARQ-ACK is multiplexed and transmitted to one PSFCH based on the priority.
  • the multiple transmission of PSFCH when a plurality of PSFCHs collide may mean that HARQ-ACK corresponding to the plurality of PSFCHs is multiplexed and transmitted to one PSFCH. ..
  • the HARQ-ACK corresponding to the PSFCH may mean the HARQ-ACK generated based on the reception result of the PSCCH corresponding to the PSFCH and / or the PSSCH, and is set to be transmitted in the PSFCH ( It may mean HARQ-ACK (associated).
  • step S401 the terminal 20 detects a PSFCH collision. Subsequently, in step S402, the terminal 20 determines whether or not the pair of the source ID and the destination ID is a collision between PSCCH and / or PSFCH corresponding to PSCH. If the pair of source ID and destination ID is a collision between PSCCH and / or PSFCH corresponding to PSCH (YES in S402), the process proceeds to step S403, and the pair of source ID and destination ID is different PSCCH and / or If there is no collision between PSFCHs corresponding to PSSCH (NO in S402), the process proceeds to step S404.
  • the determination of S402 may be performed again.
  • HARQ-ACK corresponding to the part of the PSFCH may be multiplexed in one PSFCH.
  • step S403 the terminal 20 drops the HARQ-ACK corresponding to the colliding PSFCH based on the priority without multiplexing, and transmits N PSFCHs having a high priority.
  • step S404 the terminal 20 multiplexes and transmits HARQ-ACK corresponding to the colliding PSFCH to one PSFCH. If it is not possible to multiplex and send all HARQ-ACKs, some may be dropped based on priority.
  • FIG. 15 is a flowchart for explaining an operation example (2) at the time of a PSFCH collision according to the embodiment of the present invention.
  • N PSFCH transmissions to be transmitted without multiplexing are selected based on the priority, and PSFCHs other than the selected N PSFCHs are dropped. You may.
  • the destination IDs of the PSCCH and / or PSCH may be the same or different.
  • multiplex PSFCH may be transmitted based on the priority, and if multiplex cannot be performed, the number of PSFCH transmissions based on the priority May be dropped.
  • step S501 the terminal 20 detects a PSFCH collision. Subsequently, in step S502, the terminal 20 determines whether or not there is a collision between PSCCHs having different source IDs and / or PSFCHs corresponding to PSCHs. If there is a collision between PSCCHs with different source IDs and / or PSFCHs corresponding to PSCHs (YES in S502), the process proceeds to step S503, and if there is no collision between PSCCHs with different source IDs and / or PSFCHs corresponding to PSCHs (S502). NO), the process proceeds to step S504.
  • one HARQ-ACK corresponding to the part of PSFCH is used. After multiplexing with PSFCH, the determination of S502 may be performed again. Alternatively, after applying a priority-based drop to the colliding PSFCH, HARQ-ACK corresponding to the part of the PSFCH may be multiplexed in one PSFCH.
  • step S503 the terminal 20 drops the HARQ-ACK corresponding to the colliding PSFCH based on the priority without multiplexing, and transmits N PSFCHs having a high priority.
  • step S504 the terminal 20 multiplexes and transmits HARQ-ACK corresponding to the colliding PSFCH to one PSFCH. If it is not possible to multiplex and send all HARQ-ACKs, some may be dropped based on priority.
  • HARQ-ACK can be transmitted to the terminal 20 corresponding to the same source ID as much as possible.
  • FIG. 16 is a flowchart for explaining an operation example (3) at the time of a PSFCH collision according to the embodiment of the present invention.
  • the pair of source ID and destination ID is a collision of PSFCH transmission corresponding to different PSCCH and / or PSCH, and if it can be determined that the pair of the same terminal 20 is the same, the pair is multiplexed based on the priority.
  • PSFCH may be transmitted, or if it cannot be multiplexed, some may be dropped based on the priority.
  • the pair of the source ID and the destination ID is a collision of PSFCH transmission corresponding to different PSCCH and / or PSCH, and it cannot be determined that the pair is the same terminal 20, the pair is based on the priority.
  • N PSFCH transmissions to be transmitted without multiplexing may be selected, and PSFCHs other than the selected N PSFCHs may be dropped.
  • step S601 the terminal 20 detects a PSFCH collision. Subsequently, in step S602, the terminal 20 determines whether or not the pair of the source ID and the destination ID is a collision between PSCCH and / or PSFCH corresponding to PSCH. If the pair of source ID and destination ID is a collision between PSCCH and / or PSFCH corresponding to PSCH (YES in S602), the process proceeds to step S603, and PSCCH and / or the pair of different source ID and destination ID is different. If there is no collision between PSFCHs corresponding to PSSCH (NO in S602), the process proceeds to step S604.
  • the determination of S602 may be whether or not the pair of source ID and destination ID is a collision between PSCCH and / or PSFCH corresponding to PSCH.
  • the collision of PSFCH is 3 or more and a part of the pair of source ID and destination ID is PSFCH corresponding to the same PSCCH and / or PSSCH in the determination of S602, it corresponds to the part of PSFCH.
  • the determination of S602 may be performed again.
  • step S603 the terminal 20 determines whether or not a pair of different source IDs and destination IDs corresponds to the same pair of terminals 20. When it can be determined that the pair of different source ID and destination ID corresponds to the pair of the same terminal 20, or the pair of different source ID and destination ID corresponds to the pair of the same terminal 20 (S603). YES), the process proceeds to step S604. When different source ID and destination ID pairs do not correspond to the same terminal 20 pair, or when it cannot be determined that different source ID and destination ID pairs correspond to the same terminal 20 pair (S603). NO), the process proceeds to step S605.
  • step S603 If the number of PSFCH collisions in step S603 is 3 or more, and in the determination of S603, a part of the pair of the source ID and the destination ID is a PSFCH corresponding to the same pair of terminals 20, the PSFCH of the part is selected. After multiplexing the corresponding HARQ-ACK on one PSFCH, the determination of S603 may be performed again. Alternatively, after applying a priority-based drop to the colliding PSFCH, HARQ-ACK corresponding to the part of the PSFCH may be multiplexed in one PSFCH.
  • step S604 the terminal 20 multiplexes and transmits HARQ-ACK corresponding to the colliding PSFCH. If it is not possible to multiplex and send all HARQ-ACKs, some may be dropped based on priority. On the other hand, in step S605, the terminal 20 drops the HARQ-ACK corresponding to the colliding PSFCH based on the priority without multiplexing, and transmits N PSFCHs having a high priority.
  • FIG. 17 is a flowchart for explaining an operation example (4) at the time of a PSFCH collision according to the embodiment of the present invention.
  • a collision of PSFCH transmission corresponding to PSCCH and / or PSCH having different source IDs and when it can be determined that a plurality of different source IDs correspond to the same terminal 20, multiplexing is performed based on the priority.
  • PSFCH may be sent, or some may be dropped based on priority if multiplexing is not possible.
  • multiplexing is performed based on the priority. You may select N PSFCH transmissions to be transmitted without, and drop PSFCHs other than the selected N PSFCHs.
  • step S701 the terminal 20 detects a PSFCH collision. Subsequently, in step S702, the terminal 20 determines whether or not there is a collision between PSCCHs having different source IDs and / or PSFCHs corresponding to PSSCHs. If there is a collision between PSCCHs with different source IDs and / or PSFCHs corresponding to PSCHs (YES in S702), the process proceeds to step S703, and if there is no collision between PSCCHs with different source IDs and / or PSFCHs corresponding to PSCHs (S702). NO), the process proceeds to step S704.
  • the determination of S702 may be whether or not there is a collision between PSCCHs having different source IDs and / or PSFCHs corresponding to PSSCHs. Alternatively, if the number of collisions of PSFCH is 3 or more and some source IDs are the same PSCCH and / or PSFCH corresponding to PSSCH in the determination of S702, HARQ-ACK corresponding to the part of PSFCH is one. After multiplexing with PSFCH, the determination of S702 may be performed again.
  • step S703 the terminal 20 determines whether or not different source IDs correspond to the same terminal 20. If it can be determined that the different source IDs correspond to the same terminal 20 or the different source IDs correspond to the same terminal 20 (YES in S703), the process proceeds to step S704. If it cannot be determined that the different source IDs correspond to the same terminal 20 or the different source IDs correspond to the same terminal 20 (NO in S703), the process proceeds to step S705.
  • step S703 If the PSFCH collision in step S703 is 3 or more and the PSFCH corresponds to the terminal 20 having the same source ID in the determination of S703, one HARQ-ACK corresponding to the part of the PSFCH is used. After multiplexing with PSFCH, the determination of S703 may be performed again. Alternatively, after applying a priority-based drop to the colliding PSFCH, HARQ-ACK corresponding to the part of the PSFCH may be multiplexed in one PSFCH.
  • step S704 the terminal 20 multiplexes and transmits HARQ-ACK corresponding to the colliding PSFCH. If it is not possible to multiplex and send all HARQ-ACKs, some may be dropped based on priority. On the other hand, in step S705, the terminal 20 drops the HARQ-ACK corresponding to the colliding PSFCH based on the priority without multiplexing, and transmits N PSFCHs having a high priority.
  • HARQ-ACK corresponding to a particular type of PSCCH and / or PSCH where step S404 of FIG. 14, step S504 of FIG. 15, step S604 of FIG. 16, step S704 of FIG. 17 or multiplexing is applied. You may drop based on priority without multiplexing.
  • the HARQ-ACK corresponding to a specific type of PSCCH and / or PSCH may be, for example, a group cast HARQ-ACK in which only NACK is fed back.
  • the terminal 20 can simplify the UE operation related to the determination of whether to transmit multiple times or drop when the PSFCH transmission collides. Further, the terminal 20 can transmit as many HARQ-ACKs as possible to the terminal 20 corresponding to the same source ID when the PSFCH transmission collides. Further, the terminal 20 can transmit HARQ-ACK depending on whether or not the pair of the source ID and the destination ID corresponds to the same pair of terminals 20. Further, the terminal 20 can transmit HARQ-ACK depending on whether or not the terminal 20 has the same source ID.
  • HARQ Hybrid automatic repeat request
  • the base station 10 and the terminal 20 include a function of carrying out the above-described embodiment.
  • the base station 10 and the terminal 20 may each have only a part of the functions in the embodiment.
  • FIG. 18 is a diagram showing an example of the functional configuration of the base station 10.
  • the base station 10 includes a transmission unit 110, a reception unit 120, a setting unit 130, and a control unit 140.
  • the functional configuration shown in FIG. 18 is only an example. Any function classification and name of the functional unit may be used as long as the operation according to the embodiment of the present invention can be executed.
  • the transmission unit 110 includes a function of generating a signal to be transmitted to the terminal 20 side and transmitting the signal wirelessly.
  • the receiving unit 120 includes a function of receiving various signals transmitted from the terminal 20 and acquiring information of, for example, a higher layer from the received signals. Further, the transmission unit 110 has a function of transmitting NR-PSS, NR-SSS, NR-PBCH, DL / UL control signal, DL reference signal and the like to the terminal 20.
  • the setting unit 130 stores preset setting information and various setting information to be transmitted to the terminal 20 in the storage device, and reads the setting information from the storage device as needed.
  • the content of the setting information is, for example, information related to the setting of D2D communication.
  • the control unit 140 performs processing related to the setting for the terminal 20 to perform D2D communication. Further, the control unit 140 transmits the scheduling of the D2D communication and the DL communication to the terminal 20 via the transmission unit 110. Further, the control unit 140 receives information related to the HARQ response of the D2D communication and the DL communication from the terminal 20 via the reception unit 120.
  • the function unit related to signal transmission in the control unit 140 may be included in the transmission unit 110, and the function unit related to signal reception in the control unit 140 may be included in the reception unit 120.
  • FIG. 19 is a diagram showing an example of the functional configuration of the terminal 20.
  • the terminal 20 has a transmitting unit 210, a receiving unit 220, a setting unit 230, and a control unit 240.
  • the functional configuration shown in FIG. 19 is only an example. Any function classification and name of the functional unit may be used as long as the operation according to the embodiment of the present invention can be executed.
  • the transmission unit 210 creates a transmission signal from the transmission data and wirelessly transmits the transmission signal.
  • the receiving unit 220 wirelessly receives various signals and acquires a signal of a higher layer from the received signal of the physical layer. Further, the receiving unit 220 has a function of receiving the NR-PSS, NR-SSS, NR-PBCH, DL / UL / SL control signal, reference signal, or the like transmitted from the base station 10. Further, for example, as D2D communication, the transmission unit 210 connects the other terminal 20 to PSCCH (Physical Sidelink Control Channel), PSCH (Physical Sidelink Shared Channel), PSDCH (Physical Sidelink Discovery Channel), PSBCH (Physical Sidelink Broadcast Channel). Etc., and the receiving unit 220 receives PSCCH, PSCH, PSDCH, PSBCH, etc. from the other terminal 20.
  • PSCCH Physical Sidelink Control Channel
  • PSCH Physical Sidelink Shared Channel
  • PSDCH Physical Sidelink Discovery Channel
  • PSBCH Physical
  • the setting unit 230 stores various setting information received from the base station 10 or the terminal 20 by the receiving unit 220 in the storage device, and reads it out from the storage device as needed.
  • the setting unit 230 also stores preset setting information.
  • the content of the setting information is, for example, information related to the setting of D2D communication.
  • the control unit 240 controls D2D communication with another terminal 20 as described in the embodiment.
  • the control unit 240 performs processing related to HARQ of D2D communication and DL communication.
  • the control unit 240 transmits information related to the HARQ response of the D2D communication and the DL communication from the base station 10 to the other terminal 20 scheduled to the base station 10.
  • the control unit 240 may schedule D2D communication to another terminal 20.
  • the control unit 240 may autonomously select a resource to be used for D2D communication from the resource selection window.
  • the control unit 240 performs processing related to MCS in transmission / reception of D2D communication.
  • the function unit related to signal transmission in the control unit 240 may be included in the transmission unit 210, and the function unit related to signal reception in the control unit 240 may be included in the reception unit 220.
  • each functional block may be realized by using one device that is physically or logically connected, or directly or indirectly (for example, by two or more devices that are physically or logically separated). , Wired, wireless, etc.) and may be realized using these plurality of devices.
  • the functional block may be realized by combining the software with the one device or the plurality of devices.
  • Functions include judgment, decision, judgment, calculation, calculation, processing, derivation, investigation, search, confirmation, reception, transmission, output, access, solution, selection, selection, establishment, comparison, assumption, expectation, and assumption.
  • broadcasting notifying, communicating, forwarding, configuring, reconfiguring, allocating, mapping, assigning, etc., but only these. I can't.
  • a functional block that functions transmission is called a transmitting unit (transmitting unit) or a transmitter (transmitter).
  • transmitting unit transmitting unit
  • transmitter transmitter
  • the base station 10, the terminal 20, and the like in one embodiment of the present disclosure may function as a computer that processes the wireless communication method of the present disclosure.
  • FIG. 20 is a diagram showing an example of the hardware configuration of the base station 10 and the terminal 20 according to the embodiment of the present disclosure.
  • the above-mentioned base station 10 and terminal 20 are physically configured as a computer device including a processor 1001, a storage device 1002, an auxiliary storage device 1003, a communication device 1004, an input device 1005, an output device 1006, a bus 1007, and the like. May be good.
  • the word “device” can be read as a circuit, device, unit, etc.
  • the hardware configuration of the base station 10 and the terminal 20 may be configured to include one or more of the devices shown in the figure, or may be configured not to include some of the devices.
  • the processor 1001 For each function of the base station 10 and the terminal 20, the processor 1001 performs an operation by loading predetermined software (program) on the hardware such as the processor 1001 and the storage device 1002, and controls the communication by the communication device 1004. It is realized by controlling at least one of reading and writing of data in the storage device 1002 and the auxiliary storage device 1003.
  • Processor 1001 operates, for example, an operating system to control the entire computer.
  • the processor 1001 may be composed of a central processing unit (CPU: Central Processing Unit) including an interface with a peripheral device, a control device, an arithmetic unit, a register, and the like.
  • CPU Central Processing Unit
  • control unit 140, control unit 240, and the like may be realized by the processor 1001.
  • the processor 1001 reads a program (program code), a software module, data, or the like from at least one of the auxiliary storage device 1003 and the communication device 1004 into the storage device 1002, and executes various processes according to these.
  • a program program that causes a computer to execute at least a part of the operations described in the above-described embodiment is used.
  • the control unit 140 of the base station 10 shown in FIG. 18 may be realized by a control program stored in the storage device 1002 and operated by the processor 1001.
  • the control unit 240 of the terminal 20 shown in FIG. 19 may be realized by a control program stored in the storage device 1002 and operated by the processor 1001.
  • Processor 1001 may be implemented by one or more chips.
  • the program may be transmitted from the network via a telecommunication line.
  • the storage device 1002 is a computer-readable recording medium, and is, for example, by at least one of ROM (Read Only Memory), EPROM (Erasable Programmable ROM), EEPROM (Electrically Erasable Programmable ROM), RAM (Random Access Memory), and the like. It may be configured.
  • the storage device 1002 may be referred to as a register, a cache, a main memory (main storage device), or the like.
  • the storage device 1002 can store a program (program code), a software module, or the like that can be executed to implement the communication method according to the embodiment of the present disclosure.
  • the auxiliary storage device 1003 is a computer-readable recording medium, and is, for example, an optical disk such as a CD-ROM (Compact Disc ROM), a hard disk drive, a flexible disk, an optical magnetic disk (for example, a compact disk, a digital versatile disk, Blu).
  • -It may be composed of at least one of a ray® disc), a smart card, a flash memory (eg, a card, a stick, a key drive), a floppy® disc, a magnetic strip, and the like.
  • the storage medium described above may be, for example, a database, server or other suitable medium containing at least one of the storage device 1002 and the auxiliary storage device 1003.
  • the communication device 1004 is hardware (transmission / reception device) for communicating between computers via at least one of a wired network and a wireless network, and is also referred to as, for example, a network device, a network controller, a network card, a communication module, or the like.
  • the communication device 1004 includes, for example, a high frequency switch, a duplexer, a filter, a frequency synthesizer, and the like in order to realize at least one of frequency division duplex (FDD: Frequency Division Duplex) and time division duplex (TDD: Time Division Duplex). It may be composed of.
  • FDD Frequency Division Duplex
  • TDD Time Division Duplex
  • the transmission / reception unit may be physically or logically separated from each other in the transmission unit and the reception unit.
  • the input device 1005 is an input device (for example, a keyboard, a mouse, a microphone, a switch, a button, a sensor, etc.) that receives an input from the outside.
  • the output device 1006 is an output device (for example, a display, a speaker, an LED lamp, etc.) that outputs to the outside.
  • the input device 1005 and the output device 1006 may have an integrated configuration (for example, a touch panel).
  • each device such as the processor 1001 and the storage device 1002 is connected by a bus 1007 for communicating information.
  • the bus 1007 may be configured by using a single bus, or may be configured by using a different bus for each device.
  • the base station 10 and the terminal 20 are hardware such as a microprocessor, a digital signal processor (DSP: Digital Signal Processor), an ASIC (Application Specific Integrated Circuit), a PLD (Programmable Logic Device), and an FPGA (Field Programmable Gate Array). It may be configured to include, and a part or all of each functional block may be realized by the hardware. For example, processor 1001 may be implemented using at least one of these hardware.
  • DSP Digital Signal Processor
  • ASIC Application Specific Integrated Circuit
  • PLD Programmable Logic Device
  • FPGA Field Programmable Gate Array
  • a communication unit that establishes a plurality of RRC (Radio Resource Control) connections established for a pair of a source ID and a destination ID with other terminals.
  • the receiver that receives a plurality of data in any of the plurality of RRC connections and the channel that transmits the HARQ (Hybrid automatic repeat request) response corresponding to the plurality of data are in the time domain, frequency domain, or code domain.
  • the control unit that determines the operation related to the response based on at least one of the source ID and the destination ID associated with each of the plurality of data, and the control unit that determines the operation related to the response, and the determined operation.
  • a terminal having a transmitting unit that transmits a HARQ response to the other terminal is provided.
  • the terminal 20 can simplify the UE operation related to the determination of whether to transmit multiple times or drop when the PSFCH transmission collides. Further, the terminal 20 can transmit as many HARQ-ACKs as possible to the terminal 20 corresponding to the same source ID when the PSFCH transmission collides. Further, the terminal 20 can transmit HARQ-ACK depending on whether or not the pair of the source ID and the destination ID corresponds to the same pair of terminals 20. Further, the terminal 20 can transmit HARQ-ACK depending on whether or not the terminal 20 has the same source ID. That is, in direct communication between terminals, it is possible to regulate the operation of terminals when HARQ (Hybrid automatic repeat request) feedback collides and perform appropriate HARQ control.
  • HARQ Hybrid automatic repeat request
  • the control unit When the pair of the source ID and the destination ID associated with each of the plurality of data is different, or when the source ID associated with each of the plurality of data is different from each other, the control unit has one or more HARQs having high priority. You may decide to send the channel to send the response and drop the channel to send the HARQ response other than the channel decided to send.
  • the terminal 20 can simplify the UE operation related to the determination of whether to transmit multiple times or drop when the PSFCH transmission collides. Further, the terminal 20 can transmit as many HARQ-ACKs as possible to the terminal 20 corresponding to the same source ID when the PSFCH transmission collides.
  • the control unit responds to the HARQ corresponding to the plurality of data. May be multiplexed on one channel, and the transmitter may transmit the one channel.
  • the terminal 20 can simplify the UE operation related to the determination of whether to transmit multiple times or drop when the PSFCH transmission collides. Further, the terminal 20 can transmit as many HARQ-ACKs as possible to the terminal 20 corresponding to the same source ID when the PSFCH transmission collides.
  • the control unit sets the pair of terminals having the same pair of source ID and destination ID associated with each of the plurality of data.
  • the HARQ response corresponding to the plurality of data may be multiplexed on one channel, and the transmission unit may transmit the one channel.
  • the terminal 20 can transmit HARQ-ACK depending on whether or not the pair of the source ID and the destination ID corresponds to the same pair of the terminal 20.
  • the control unit When the source IDs associated with the plurality of data are different from each other and the source IDs associated with the plurality of data correspond to the same terminal, the control unit responds to the HARQ response corresponding to the plurality of data. May be multiplexed on one channel, and the transmitter may transmit the one channel. With this configuration, the terminal 20 can transmit HARQ-ACK depending on whether or not the terminal 20 has the same source ID.
  • the HARQ response is based on the control procedure for determining the operation related to the response based on at least one of the source ID and the destination ID associated with each of the plurality of data, and the determined operation.
  • a communication method is provided in which a terminal executes a transmission procedure for transmitting to another terminal.
  • the terminal 20 can simplify the UE operation related to the determination of whether to transmit multiple times or drop when the PSFCH transmission collides. Further, the terminal 20 can transmit as many HARQ-ACKs as possible to the terminal 20 corresponding to the same source ID when the PSFCH transmission collides. Further, the terminal 20 can transmit HARQ-ACK depending on whether or not the pair of the source ID and the destination ID corresponds to the same pair of terminals 20. Further, the terminal 20 can transmit HARQ-ACK depending on whether or not the terminal 20 has the same source ID. That is, in direct communication between terminals, it is possible to regulate the operation of terminals when HARQ (Hybrid automatic repeat request) feedback collides and perform appropriate HARQ control.
  • HARQ Hybrid automatic repeat request
  • the boundary of the functional unit or the processing unit in the functional block diagram does not always correspond to the boundary of the physical component.
  • the operation of the plurality of functional units may be physically performed by one component, or the operation of one functional unit may be physically performed by a plurality of components.
  • the processing order may be changed as long as there is no contradiction.
  • the base station 10 and the terminal 20 have been described with reference to functional block diagrams, but such devices may be implemented in hardware, software, or a combination thereof.
  • the software operated by the processor of the base station 10 according to the embodiment of the present invention and the software operated by the processor of the terminal 20 according to the embodiment of the present invention are random access memory (RAM), flash memory, and read-only memory, respectively. It may be stored in (ROM), EPROM, EEPROM, registers, hard disk (HDD), removable disk, CD-ROM, database, server or any other suitable storage medium.
  • information notification includes physical layer signaling (for example, DCI (Downlink Control Information), UCI (Uplink Control Information)), higher layer signaling (for example, RRC (Radio Resource Control) signaling, MAC (Medium Access Control) signaling, etc. Broadcast information (MIB (Master Information Block), SIB (System Information Block)), other signals, or a combination thereof may be used.
  • RRC signaling may be referred to as an RRC message, for example, RRC. It may be a connection setup (RRCConnectionSetup) message, an RRC connection reconfiguration (RRCConnectionReconfiguration) message, or the like.
  • Each aspect / embodiment described in the present disclosure includes LTE (Long Term Evolution), LTE-A (LTE-Advanced), SUPER 3G, IMT-Advanced, 4G (4th generation mobile communication system), and 5G (5th generation mobile communication).
  • system FRA (Future Radio Access), NR (new Radio), W-CDMA (registered trademark), GSM (registered trademark), CDMA2000, UMB (Ultra Mobile Broadband), IEEE 802.11 (Wi-Fi (registered trademark)) )), LTE 802.16 (WiMAX®), IEEE 802.20, UWB (Ultra-WideBand), Bluetooth®, and other systems that utilize suitable systems and have been extended based on these. It may be applied to at least one of the next generation systems. Further, a plurality of systems may be applied in combination (for example, a combination of at least one of LTE and LTE-A and 5G).
  • the specific operation performed by the base station 10 in the present specification may be performed by its upper node.
  • various operations performed for communication with the terminal 20 are performed by the base station 10 and other network nodes other than the base station 10 (for example, it is clear that it can be done by at least one of (but not limited to, MME, S-GW, etc.).
  • the other network node may be a combination of a plurality of other network nodes (for example, MME and S-GW). ..
  • the information, signals, etc. described in the present disclosure can be output from the upper layer (or lower layer) to the lower layer (or upper layer). Input / output may be performed via a plurality of network nodes.
  • the input / output information and the like may be stored in a specific location (for example, memory) or may be managed using a management table. Input / output information and the like can be overwritten, updated, or added. The output information and the like may be deleted. The input information or the like may be transmitted to another device.
  • the determination in the present disclosure may be made by a value represented by 1 bit (0 or 1), by a boolean value (Boolean: true or false), or by comparing numerical values (for example,). , Comparison with a predetermined value).
  • Software whether referred to as software, firmware, middleware, microcode, hardware description language, or by any other name, is an instruction, instruction set, code, code segment, program code, program, subprogram, software module.
  • Applications, software applications, software packages, routines, subroutines, objects, executable files, execution threads, procedures, features, etc. should be broadly interpreted.
  • software, instructions, information, etc. may be transmitted and received via a transmission medium.
  • a transmission medium For example, a website that uses at least one of wired technology (coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL: Digital Subscriber Line), etc.) and wireless technology (infrared, microwave, etc.).
  • wired technology coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL: Digital Subscriber Line), etc.
  • wireless technology infrared, microwave, etc.
  • the information, signals, etc. described in this disclosure may be represented using any of a variety of different techniques.
  • data, instructions, commands, information, signals, bits, symbols, chips, etc. that may be referred to throughout the above description are voltages, currents, electromagnetic waves, magnetic fields or magnetic particles, light fields or photons, or any of these. It may be represented by a combination of.
  • a channel and a symbol may be a signal (signaling).
  • the signal may be a message.
  • the component carrier CC: Component Carrier
  • CC Component Carrier
  • system and “network” used in this disclosure are used interchangeably.
  • the information, parameters, etc. described in the present disclosure may be expressed using absolute values, relative values from predetermined values, or using other corresponding information. It may be represented.
  • the radio resource may be one indicated by an index.
  • base station Base Station
  • wireless base station base station
  • base station fixed station
  • NodeB nodeB
  • eNodeB eNodeB
  • gNodeB gNodeB
  • access point “ transmission point ”,“ reception point ”,“ transmission / reception point ”,“ cell ”,“ sector ”,“ Terms such as “cell group”, “carrier”, and “component carrier” can be used interchangeably.
  • Base stations are sometimes referred to by terms such as macrocells, small cells, femtocells, and picocells.
  • the base station can accommodate one or more (for example, three) cells.
  • a base station accommodates multiple cells, the entire coverage area of the base station can be divided into multiple smaller areas, each smaller area being a base station subsystem (eg, a small indoor base station (RRH:)).
  • Communication services can also be provided by Remote Radio Head).
  • the term "cell” or “sector” refers to part or all of the coverage area of at least one of the base stations and base station subsystems that provide communication services in this coverage. Point to.
  • MS Mobile Station
  • UE User Equipment
  • Mobile stations can be used by those skilled in the art as subscriber stations, mobile units, subscriber units, wireless units, remote units, mobile devices, wireless devices, wireless communication devices, remote devices, mobile subscriber stations, access terminals, mobile terminals, wireless. It may also be referred to as a terminal, remote terminal, handset, user agent, mobile client, client, or some other suitable term.
  • At least one of the base station and the mobile station may be called a transmitting device, a receiving device, a communication device, or the like. At least one of the base station and the mobile station may be a device mounted on the mobile body, the mobile body itself, or the like.
  • the moving body may be a vehicle (for example, a car, an airplane, etc.), an unmanned moving body (for example, a drone, an autonomous vehicle, etc.), or a robot (manned or unmanned type). ) May be.
  • at least one of the base station and the mobile station includes a device that does not necessarily move during communication operation.
  • at least one of the base station and the mobile station may be an IoT (Internet of Things) device such as a sensor.
  • IoT Internet of Things
  • the base station in the present disclosure may be read by the user terminal.
  • the communication between the base station and the user terminal is replaced with the communication between a plurality of terminals 20 (for example, it may be called D2D (Device-to-Device), V2X (Vehicle-to-Everything), etc.).
  • D2D Device-to-Device
  • V2X Vehicle-to-Everything
  • Each aspect / embodiment of the present disclosure may be applied to the configuration.
  • the terminal 20 may have the function of the base station 10 described above.
  • words such as "up” and “down” may be read as words corresponding to inter-terminal communication (for example, "side”).
  • an uplink channel, a downlink channel, and the like may be read as a side channel.
  • the user terminal in the present disclosure may be read as a base station.
  • the base station may have the functions of the above-mentioned user terminal.
  • determining and “determining” used in this disclosure may include a wide variety of actions.
  • “Judgment” and “decision” are, for example, judgment (judging), calculation (calculating), calculation (computing), processing (processing), derivation (deriving), investigation (investigating), search (looking up, search, inquiry). (For example, searching in a table, database or another data structure), ascertaining may be regarded as “judgment” or “decision”.
  • judgment and “decision” are receiving (for example, receiving information), transmitting (for example, transmitting information), input (input), output (output), and access.
  • Accessing (for example, accessing data in memory) may be regarded as "judgment” or “decision”.
  • judgment and “decision” mean that the things such as solving, selecting, choosing, establishing, and comparing are regarded as “judgment” and “decision”. Can include. That is, “judgment” and “decision” may include considering some action as “judgment” and “decision”. Further, “judgment (decision)” may be read as “assuming”, “expecting”, “considering” and the like.
  • connection means any direct or indirect connection or connection between two or more elements, and each other. It can include the presence of one or more intermediate elements between two “connected” or “combined” elements.
  • the connection or connection between the elements may be physical, logical, or a combination thereof.
  • connection may be read as "access”.
  • the two elements use at least one of one or more wires, cables and printed electrical connections, and, as some non-limiting and non-comprehensive examples, the radio frequency domain. Can be considered to be “connected” or “coupled” to each other using electromagnetic energies having wavelengths in the microwave and light (both visible and invisible) regions.
  • the reference signal can also be abbreviated as RS (Reference Signal), and may be called a pilot (Pilot) depending on the applicable standard.
  • RS Reference Signal
  • Pilot Pilot
  • references to elements using designations such as “first”, “second”, etc. as used in this disclosure does not generally limit the quantity or order of those elements. These designations can be used in the present disclosure as a convenient way to distinguish between two or more elements. Thus, references to the first and second elements do not mean that only two elements can be adopted, or that the first element must somehow precede the second element.
  • each of the above devices may be replaced with a "part”, a “circuit”, a “device”, or the like.
  • the wireless frame may be composed of one or more frames in the time domain. Each one or more frames in the time domain may be referred to as a subframe. Subframes may further consist of one or more slots in the time domain.
  • the subframe may have a fixed time length (eg, 1 ms) that does not depend on numerology.
  • the numerology may be a communication parameter that applies to at least one of the transmission and reception of a signal or channel.
  • Numerology includes, for example, subcarrier spacing (SCS: SubCarrier Spacing), bandwidth, symbol length, cyclic prefix length, transmission time interval (TTI: Transmission Time Interval), number of symbols per TTI, wireless frame configuration, and transmitter / receiver.
  • SCS subcarrier spacing
  • TTI Transmission Time Interval
  • At least one of a specific filtering process performed in the frequency domain, a specific windowing process performed by the transmitter / receiver in the time domain, and the like may be indicated.
  • the slot may be composed of one or more symbols in the time domain (OFDM (Orthogonal Frequency Division Multiplexing) symbol, SC-FDMA (Single Carrier Frequency Division Multiple Access) symbol, etc.). Slots may be in time units based on numerology.
  • OFDM Orthogonal Frequency Division Multiplexing
  • SC-FDMA Single Carrier Frequency Division Multiple Access
  • the slot may include a plurality of mini slots. Each minislot may consist of one or more symbols in the time domain.
  • the mini-slot may also be referred to as a sub-slot.
  • a minislot may consist of a smaller number of symbols than the slot.
  • PDSCH (or PUSCH) transmitted in time units larger than the minislot may be referred to as PDSCH (or PUSCH) mapping type A.
  • the PDSCH (or PUSCH) transmitted using the minislot may be referred to as PDSCH (or PUSCH) mapping type B.
  • the wireless frame, subframe, slot, minislot and symbol all represent the time unit when transmitting a signal.
  • the radio frame, subframe, slot, minislot and symbol may have different names corresponding to each.
  • one subframe may be called a transmission time interval (TTI), a plurality of consecutive subframes may be called TTI, and one slot or one minislot may be called TTI.
  • TTI transmission time interval
  • the unit representing TTI may be called a slot, a mini slot, or the like instead of a subframe.
  • TTI refers to, for example, the minimum time unit of scheduling in wireless communication.
  • the base station schedules each terminal 20 to allocate radio resources (frequency bandwidth that can be used in each terminal 20, transmission power, etc.) in TTI units.
  • the definition of TTI is not limited to this.
  • the TTI may be a transmission time unit such as a channel-encoded data packet (transport block), a code block, or a code word, or may be a processing unit such as scheduling or link adaptation.
  • the time interval for example, the number of symbols
  • the transport block, code block, code word, etc. may be shorter than the TTI.
  • one or more TTIs may be the minimum time unit for scheduling. Further, the number of slots (number of mini-slots) constituting the minimum time unit of the scheduling may be controlled.
  • a TTI having a time length of 1 ms may be referred to as a normal TTI (TTI in LTE Rel. 8-12), a normal TTI, a long TTI, a normal subframe, a normal subframe, a long subframe, a slot, or the like.
  • TTIs shorter than normal TTIs may be referred to as shortened TTIs, short TTIs, partial TTIs (partial or fractional TTIs), shortened subframes, short subframes, minislots, subslots, slots, and the like.
  • the long TTI (for example, normal TTI, subframe, etc.) may be read as a TTI having a time length of more than 1 ms, and the short TTI (for example, shortened TTI, etc.) is less than the TTI length of the long TTI and 1 ms. It may be read as a TTI having the above TTI length.
  • the resource block (RB) is a resource allocation unit in the time domain and the frequency domain, and may include one or a plurality of continuous subcarriers in the frequency domain.
  • the number of subcarriers contained in the RB may be the same regardless of the numerology, and may be, for example, 12.
  • the number of subcarriers contained in the RB may be determined based on numerology.
  • the time domain of RB may include one or more symbols, and may have a length of 1 slot, 1 mini slot, 1 subframe, or 1 TTI.
  • Each 1TTI, 1 subframe, etc. may be composed of one or a plurality of resource blocks.
  • One or more RBs include a physical resource block (PRB: Physical RB), a sub-carrier group (SCG: Sub-Carrier Group), a resource element group (REG: Resource Element Group), a PRB pair, an RB pair, and the like. May be called.
  • PRB Physical resource block
  • SCG Sub-Carrier Group
  • REG Resource Element Group
  • PRB pair an RB pair, and the like. May be called.
  • the resource block may be composed of one or a plurality of resource elements (RE: Resource Element).
  • RE Resource Element
  • 1RE may be a radio resource area of 1 subcarrier and 1 symbol.
  • Bandwidth part (which may also be called partial bandwidth) may represent a subset of consecutive common resource blocks (RBs) for a certain neurology in a carrier.
  • the common RB may be specified by the index of the RB with respect to the common reference point of the carrier.
  • PRBs may be defined in a BWP and numbered within that BWP.
  • the BWP may include a BWP for UL (UL BWP) and a BWP for DL (DL BWP).
  • UL BWP UL BWP
  • DL BWP DL BWP
  • One or more BWPs may be set in one carrier for the terminal 20.
  • At least one of the configured BWPs may be active, and the terminal 20 does not have to assume that a predetermined signal / channel is transmitted or received outside the active BWP.
  • “cell”, “carrier” and the like in this disclosure may be read as “BWP”.
  • the above-mentioned structures such as wireless frames, subframes, slots, mini slots and symbols are merely examples.
  • the number of subframes contained in a wireless frame the number of slots per subframe or wireless frame, the number of minislots contained within a slot, the number of symbols and RBs contained in a slot or minislot, included in the RB.
  • the number of subcarriers, the number of symbols in the TTI, the symbol length, the cyclic prefix (CP) length, and the like can be changed in various ways.
  • the term "A and B are different” may mean “A and B are different from each other”.
  • the term may mean that "A and B are different from C”.
  • Terms such as “separate” and “combined” may be interpreted in the same way as “different”.
  • the notification of predetermined information (for example, the notification of "being X") is not limited to the explicit one, but is performed implicitly (for example, the notification of the predetermined information is not performed). May be good.
  • HARQ-ACK in the present disclosure is an example of a HARQ response.
  • the transmitting unit 210 and the receiving unit 220 are examples of communication units.
  • Base station 110 Transmission unit 120 Reception unit 130 Setting unit 140 Control unit 20 Terminal 210 Transmission unit 220 Reception unit 230 Setting unit 240 Control unit 1001 Processor 1002 Storage device 1003 Auxiliary storage device 1004 Communication device 1005 Input device 1006 Output device

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

La présente invention concerne un terminal qui comprend : une unité de communication permettant d'établir, avec d'autres terminaux, une pluralité de connexions de gestion de ressources radio (RRC) établies par rapport aux paires respectives d'ID de source et d'ID de destination ; une unité de réception permettant de recevoir une pluralité d'ensembles de données dans une connexion de la pluralité de connexions de RRC ; une unité de commande qui, lors d'une collision entre chacun des canaux permettant de transmettre des réponses de requête automatique de répétition hybride (HARQ) correspondant à la pluralité d'ensembles de données dans au moins une région parmi une région de temps, une région de fréquence ou une région de code, permet de déterminer une opération relative aux réponses sur la base des ID de source et/ou des ID de destination associés à la pluralité d'ensembles de données ; et une unité de transmission permettant de transmettre une réponse de HARQ aux autres terminaux sur la base de l'opération déterminée.
PCT/JP2019/043773 2019-11-07 2019-11-07 Terminal et procédé de communication WO2021090459A1 (fr)

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* Cited by examiner, † Cited by third party
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WO2023051699A1 (fr) * 2021-09-30 2023-04-06 夏普株式会社 Procédé mis en œuvre par un équipement utilisateur et équipement utilisateur
WO2023095592A1 (fr) * 2021-11-26 2023-06-01 ソニーグループ株式会社 Dispositif de communication et procédé de communication

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WO2018084199A1 (fr) * 2016-11-04 2018-05-11 京セラ株式会社 Procédé de communication

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WO2018084199A1 (fr) * 2016-11-04 2018-05-11 京セラ株式会社 Procédé de communication

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023051699A1 (fr) * 2021-09-30 2023-04-06 夏普株式会社 Procédé mis en œuvre par un équipement utilisateur et équipement utilisateur
WO2023095592A1 (fr) * 2021-11-26 2023-06-01 ソニーグループ株式会社 Dispositif de communication et procédé de communication

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