WO2022153464A1 - Terminal et procédé de communication - Google Patents

Terminal et procédé de communication Download PDF

Info

Publication number
WO2022153464A1
WO2022153464A1 PCT/JP2021/001124 JP2021001124W WO2022153464A1 WO 2022153464 A1 WO2022153464 A1 WO 2022153464A1 JP 2021001124 W JP2021001124 W JP 2021001124W WO 2022153464 A1 WO2022153464 A1 WO 2022153464A1
Authority
WO
WIPO (PCT)
Prior art keywords
terminal
resource
transmission
communication
base station
Prior art date
Application number
PCT/JP2021/001124
Other languages
English (en)
Japanese (ja)
Inventor
翔平 吉岡
聡 永田
Original Assignee
株式会社Ｎｔｔドコモ
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 株式会社Ｎｔｔドコモ filed Critical 株式会社Ｎｔｔドコモ
Priority to PCT/JP2021/001124 priority Critical patent/WO2022153464A1/fr
Priority to CN202180088118.2A priority patent/CN116711436A/zh
Publication of WO2022153464A1 publication Critical patent/WO2022153464A1/fr

Links

Images

Classifications

    • 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]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/02—Selection of wireless resources by user or terminal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/50—Allocation or scheduling criteria for wireless resources
    • H04W72/54—Allocation or scheduling criteria for wireless resources based on quality criteria
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA

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).
  • Power saving is being considered as a strengthening of the NR side link.
  • the terminal executes partial sensing that senses a limited resource in the sensing window, and the terminal performs partial sensing. Based on the result, select available resource candidates from the resource selection window.
  • the resource allocation mode 2 it is assumed that the resource is determined by performing random selection without executing sensing. Therefore, a collision of side link transmission may occur, and the reliability or delay performance of the side link transmission may be deteriorated.
  • the present invention has been made in view of the above points, and an object of the present invention is to improve the reliability of communication at the time of autonomous resource selection in direct communication between terminals.
  • a control unit that performs an operation related to transmission collision avoidance and selects a resource from the resource pool, and another using the selected resource.
  • a terminal having a transmission unit that transmits to the terminal of the above is provided.
  • 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 sequence diagram which shows the operation example (1) of V2X.
  • 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.
  • studies are underway to realize large capacity, low delay, high reliability, and QoS (Quality of Service) 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 defined 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.
  • the terminal 20 is not limited to the V2X terminal, and may be any type of terminal that performs D2D communication.
  • the terminal 20 may be a terminal owned by a user such as a smartphone, or may be an IoT (Internet of Things) device such as a smart meter.
  • IoT Internet of Things
  • FIG. 2 is a diagram for explaining an example (1) of the transmission mode of V2X.
  • the base station 10 transmits the side link 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.
  • side link transmission mode 3 in LTE Uu-based side link scheduling is performed.
  • Uu is a wireless interface between UTRAN (Universal Terrestrial Radio Access Network) and UE (User Equipment).
  • the side link communication transmission mode shown in FIG. 2 may be referred to as 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 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 side link resource pattern is transmitted from the base station 10 to the terminal 20A via the RRC (Radio Resource Control) setting, or is set in advance.
  • the terminal 20A transmits the PSCH to the terminal 20B based on the 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 side link scheduling to the terminal 20B via the PSCCH. Subsequently, 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 sequence diagram showing an operation example (1) of V2X.
  • the wireless communication system according to the embodiment of the present invention may have 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.
  • the device including the various sensors may be 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.
  • 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 period may be specified by the implementation conditions of the terminal such as the processing time or the maximum allowable delay time of the packet, or the period may be specified in advance by the specifications.
  • a predetermined period may be referred to as an interval on the time domain.
  • step S102 and step S103 the terminal 20A transmits SCI (Sidelink Control Information) by PSCCH and / or PSCH by using the resource autonomously selected in step S101, and transmits SL data by PSCH.
  • the terminal 20A may transmit the PSCCH with the same time resource as at least a part of the time resource of the PSCH, using the frequency resource adjacent to the frequency resource of the PSCH.
  • the terminal 20B receives the SCI (PSCCH and / or PSSCH) and SL data (PSSCH) transmitted from the terminal 20A.
  • the received SCI may include information on PSFCH resources for the terminal 20B to transmit 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 by using the resource of PSFCH determined from the received SCI.
  • step S105 the terminal 20A retransmits the PSCCH and the 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 sequence diagram showing an operation example (2) of V2X. 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.
  • step S202 and step S203 the terminal 20A transmits SCI by PSCCH and / or PSCH by using the resource autonomously selected in step S201, and transmits SL data by PSCH.
  • the terminal 20A may transmit the PSCCH with the same time resource as at least a part of the time resource of the PSCH, using the frequency resource adjacent to the frequency resource of the PSCH.
  • step S204 the terminal 20A retransmits the SCI by PSCCH and / or 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 sequence diagram showing an operation example (3) of V2X.
  • the base station 10 may schedule the side link. 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 with HARQ feedback is applied, base station 10 may transmit information indicating PSFCH resources to 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 / or PSCH by using the resource specified by SL scheduling DCI, and also transmits SL data by PSCH.
  • SCI Servicelink Control Information
  • SL scheduling DCI only PSCH resources may be specified.
  • the terminal 20A may transmit the PSCCH with the same time resource as at least a part of the time resource of the PSCH, using the frequency resource adjacent to the frequency resource of the PSCH.
  • the terminal 20B receives the SCI (PSCCH and / or PSSCH) and SL data (PSSCH) transmitted from the terminal 20A.
  • the SCI received by the PSCCH and / or the PSCH includes information on the resources of the PSFCH for the terminal 20B to transmit 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 by using the resource of PSFCH determined from the received SCI.
  • the terminal 20A has the PUCCH (or the SL scheduling DCI) 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 resource, and the base station 10 receives the HARQ-ACK.
  • the HARQ-ACK codebook may include HARQ-ACK generated based on HARQ-ACK received from the terminal 20B or PSFCH not received, and HARQ-ACK for DL data. However, HARQ-ACK for DL data is not included when DL data is not assigned. NR Rel. In 16, the HARQ-ACK codebook does not include HARQ-ACK for DL data.
  • step S304 and / or step S305 may not be executed.
  • FIG. 13 is a sequence diagram showing an operation example (4) of V2X.
  • PSFCH Physical Uplink Control Channel
  • the PSFCH format for example, the same format as PUCCH (Physical Uplink Control Channel) format 0 can be used. That is, the PSFCH format may have a PRB (Physical Resource Block) size of 1, and ACK and NACK may be sequence-based formats identified by sequence and / or cyclic shift differences.
  • the format of PSFCH is not limited to this.
  • the resources of PSFCH may be arranged in the symbol at the end of the slot or the plurality of symbols at the end. Further, whether or not the period N is set in the PSFCH resource is specified in advance. The period N may be set or predetermined in slot units.
  • the vertical axis corresponds to the frequency domain and the horizontal axis corresponds to the time domain.
  • the PSCCH may be arranged in one symbol at the beginning of the slot, may be arranged in a plurality of symbols from the beginning, or may be arranged in a plurality of symbols from a symbol other than the beginning.
  • the PSFCH may be arranged in one symbol at the end of the slot, or may be arranged in a plurality of symbols at the end of the slot. In the above-mentioned "slot start" and "slot end", consideration of the symbol for AGC (Automatic Gain Control) and the symbol for transmission / reception switching may be omitted.
  • the beginning of the slot and “the end of the slot” mean that the 12 symbols excluding the beginning and ending symbols are the beginning and ending symbols, respectively. You may.
  • three subchannels are set in the resource pool, and two PSFCHs are arranged three slots after the slot in which the PSSCH is arranged.
  • the arrow from PSSCH to PSFCH shows an example of PSFCH associated with PSSCH.
  • step S401 the terminal 20A, which is the transmitting side terminal 20, executes a group cast to the terminal 20B, the terminal 20C, and the terminal 20D, which are the receiving side terminals 20, via SL-SCH.
  • terminal 20B uses PSFCH # B
  • terminal 20C uses PSFCH # C
  • terminal 20D uses PSFCH # D to transmit a HARQ response to terminal 20A.
  • the transmitting side terminal 20 may know the number of receiving side terminals 20 in the group cast. In group cast option 1, only NACK is transmitted as a HARQ response, and ACK is not transmitted.
  • FIG. 14 is a diagram showing an example of sensing operation in NR.
  • the terminal 20 selects a resource and transmits the resource.
  • the terminal 20 performs sensing in a sensing window in the resource pool.
  • the terminal 20 receives a resource reservation field or a resource allocation field included in the SCI transmitted from another terminal 20, and selects a resource in the resource pool based on the field. Identify available resource candidates in the window (resource selection window). Subsequently, the terminal 20 randomly selects a resource from the available resource candidates.
  • the resource pool setting may have a period.
  • the period may be a period of 10240 milliseconds.
  • FIG. 14 shows an example in which slots t 0 SL to slot t Tmax SL are set as resource pools.
  • the area of the resource pool in each cycle may be set by, for example, a bitmap.
  • the transmission trigger in the terminal 20 is generated in the slot n and the priority of the transmission is pTX .
  • the terminal 20 can detect, for example, that another terminal 20 is transmitting the priority pRX in the sensing window from the slot n-T 0 to the slot immediately before the slot n-T proc, 0 . ..
  • RSRP Reference Signal Received Power
  • the threshold value may be, for example, the threshold values Th pTX, pRX set or defined for each resource in the sensing window based on the priority pTX and the priority pRX .
  • resources in the resource selection window that are candidates for resource reservation information corresponding to resources in the sensing window that have not been monitored for transmission are excluded.
  • a resource occupied by another UE is identified, and a resource excluding the resource becomes a usable resource candidate.
  • the set of available resource candidates is SA
  • the thresholds Th pTX and pRX set for each resource in the sensing window are increased by 3 dB and the resource is again increased.
  • Identification may be performed. That is, by increasing the threshold values Th pTX and pRX and executing resource identification again, the resources that are not excluded because RSRP is less than the threshold value are increased, and the set SA of resource candidates becomes 20% or more of the resource selection window. It may be.
  • the operation of increasing the threshold values Th pTX and pRX set for each resource in the sensing window by 3 dB and executing resource identification again may be repeated.
  • the lower layer of the terminal 20 may report SA to the upper layer.
  • the upper layer of the terminal 20 may execute a random selection for SA to determine the resource to be used.
  • the terminal 20 may execute the side link transmission using the determined resource.
  • the receiving side terminal 20 detects data transmission from the other terminal 20 based on the result of sensing or partial sensing, and the other terminal Data may be received from 20.
  • FIG. 15 is a flowchart showing an example of preemption in NR.
  • FIG. 16 is a diagram showing an example of preemption in NR.
  • the terminal 20 executes sensing in the sensing window. When the terminal 20 performs a power saving operation, sensing may be executed for a limited period specified in advance. Subsequently, the terminal 20 identifies each resource in the resource selection window based on the sensing result, determines a set SA of resource candidates, and selects a resource to be used for transmission (S502). Subsequently, the terminal 20 selects a resource set (r_0, r_1, ...) For determining preemption from the set of resource candidates SA (S503). The resource set may be notified from the upper layer to the PHY layer as a resource for determining whether or not it is preempted.
  • step S504 the terminal 20 re-identifies each resource in the resource selection window based on the sensing result at the timing of T (r_0) -T 3 shown in FIG. 16 to determine the set SA of resource candidates. Further, the preemption is determined for the resource set (r_0, r_1, ...) Based on the priority. For example, in r_1 shown in FIG. 16, SCI transmitted from another terminal 20 is detected by resensing , and is not included in SA. When preemption is enabled, if the value prio_RX indicating the priority of SCI transmitted from the other terminal 20 is lower than the value prio_TX indicating the priority of the transport block transmitted from the own terminal, the terminal 20 uses the resource r_1.
  • the terminal 20 determines that the resource r_1 has been preempted.
  • step S505 when the preemption is determined in step S504, the terminal 20 notifies the upper layer of the preemption, reselects the resource in the upper layer, and ends the preemption.
  • the resources of the resource set ( r_0 , r_1, ...) are set in SA. If is not included, the resource is not used and the resource is reselected in the upper layer.
  • the random resource selection and partial sensing of the side link in LTE release 14 may be applied to the resource allocation mode 2 of the NR release 16 side link.
  • the terminal 20 to which the partial sensing is applied performs reception and sensing only in a specific slot in the sensing window.
  • eURLLC enhanced Ultra Reliable Low Latency Communication
  • the terminal 20A may share information indicating a resource set with the terminal 20B, and the terminal 20B may consider the information in resource selection for transmission.
  • the terminal 20 may execute full sensing as shown in FIG. Further, the terminal 20 may execute resource identification by sensing only limited resources as compared with full sensing, and execute partial sensing that selects resources from the identified resource set. Further, the terminal 20 does not exclude the resource from the resource in the resource selection window, sets the resource in the resource selection window as the identified resource set, and executes random selection to select the resource from the identified resource set. You may.
  • the operation may be specified assuming two types of terminals 20.
  • One is type A, the type A terminal 20 is not capable of receiving any sidelink signals and channels. However, the exception may be to receive at least one of PSFCH and S-SSB.
  • the other is type D, where the type D terminal 20 has the ability to receive all sidelink signals and channels defined in release 16. However, it does not exclude receiving some sidelink signals and channels.
  • multiple resource allocation methods can be set for a resource pool.
  • the type A terminal 20 selects resources without performing sensing and transmits data. Therefore, it is assumed that the transmission of the type A terminal 20 and the transmission of the other terminal 20 frequently collide with each other. Therefore, it is desirable to introduce a method for avoiding collisions.
  • the type X terminal 20 is a terminal 20 that does not receive a specific side link signal.
  • the type X terminal 20 may be a type A terminal 20.
  • the particular side link signal may be all or part of the PSCCH, PSCH, S-SSB, PSFCH and all related reference signals. Not receiving a particular sidelink signal may be equivalent to not receiving and / or sensing data.
  • the type Y terminal 20 is a terminal 20 capable of receiving all side link signals.
  • the type Y terminal 20 may be a type D terminal 20. All side link signals may be PSCCH, PSCH, S-SSB, PSFCH and all related reference signals.
  • the type Y terminal 20 may be a terminal 20 that performs any of full sensing, partial sensing, and random selection.
  • FIG. 17 is a flowchart for explaining an example of communication according to the embodiment of the present invention.
  • the terminal 20 executes an operation related to transmission collision avoidance in the resource pool in which random selection is executed.
  • the terminal 20 in step S601 may be a type X terminal 20 or a type Y terminal 20 that executes random selection.
  • the type X terminal 20 may be replaced with a type Y terminal that executes random selection.
  • step S601 As the operation related to the transmission collision avoidance in step S601, the specific restrictions shown in 1) -4) below may be set for the transmission priority level of each terminal 20.
  • High priority may be applied to the transmission of the type X terminal 20.
  • a certain priority may be set, or a range of priorities may be set and one may be selected from the range.
  • a low priority may be applied to the transmission of the type Y terminal 20.
  • a certain priority may be set, or a range of priorities may be set and one may be selected from the range.
  • the type Y terminal 20 may mean a type Y terminal 20 that performs full sensing or partial sensing.
  • the type Y terminal 20 may always perform a reevaluation or a preemption check.
  • the resource pool may be available only to type X terminals 20 and type Y terminals 20 that support reassessment or preemption checking. Resource selection may be applied based on the results of reassessment or preemption checks. The behavior of reassessment or preemption checking may be similar to that of Release 16 as shown in FIGS. 15 and 16.
  • intra-UE prioritization may be performed for collisions between PSCCH / PSCH transmissions and UL transmissions / DL receptions.
  • the other priority level may be specified or set.
  • the type Y terminal 20 can be operated so as not to collide with the signal transmission of the type X terminal 20.
  • resource allocation, re-evaluation, and preemption check operations can be performed in the same manner as in the release 16 UE.
  • step S601 As an operation related to transmission collision avoidance in step S601, even if the type Y terminal 20 executes a resource allocation, re-evaluation, and preemption check operation different from those of the release 16 UE as shown in 1) -4) below. good.
  • the terminal 20 of type X reserves the resources R_x, y
  • the terminal 20 of type Y excludes the resources R_x, y from the identified set regardless of the priority or RSRP. May be good.
  • the type Y terminal 20 is based on a priority or RSRP threshold different from that of the terminal 20 other than the type X terminal 20.
  • Resources R_x, y may be excluded from the identified set.
  • a priority or RSRP threshold for a type X terminal 20 and a priority or RSRP threshold for a terminal 20 other than the type X terminal 20 may be set.
  • a resource may be preferentially selected from resources other than the resource reserved by the type X terminal 20.
  • the type X terminal 20 may notify the SCI that the transmission or reservation is from the type X terminal 20.
  • the UE-ID may notify the transmission or reservation from the type X terminal 20. Further, depending on the priority, it may be notified that the transmission or reservation is from the type X terminal 20.
  • the SCI format may notify that the transmission or reservation is from the type X terminal 20.
  • a dedicated SCI field may notify that the transmission or reservation is from the type X terminal 20. Further, it may be notified that the transmission or reservation is from the type X terminal 20 by either the 1st stage SCI via the PSCCH or the 2nd stage SCI via the PSCCH.
  • the type Y terminal 20 can be operated so as not to collide with the signal transmission of the type X terminal 20.
  • the type X terminal 20 may execute resource selection based on the predetermined constraints shown in 1) -3) below.
  • the type X terminal 20 may select resources based on a predetermined pattern.
  • a predetermined pattern in the time domain may be determined. For example, resources may be selected every 4 slots (slot n, slot n + 4, slot n + 8 ...), The first slot may be randomly selected, and thereafter, they may be selected at predetermined intervals.
  • a predetermined pattern in the frequency domain may be determined. For example, the same subchannel may be selected, the frequency resource of the first resource may be randomly selected, and then the frequency resource may be determined by a predetermined rule. Further, the predetermined pattern may be notified in SCI. Further, the predetermined pattern may be set for each resource pool or each terminal 20. Further, the predetermined pattern may be determined based on the UE-ID. The above "predetermined pattern" may be described as a "resource pattern".
  • the type Y terminal 20 may execute resource selection based on the resource pattern of the type X terminal 20.
  • the type Y terminal 20 may execute resource selection so as not to match the resource pattern based on the UE-ID of the signal received at a predetermined time. Further, the resource selection method of the type Y terminal 20 may be based on the UE implementation.
  • the type X terminal 20 may execute periodic resource reservation.
  • the resource pool may be a resource pool for which periodic resource reservation is enabled.
  • the type Y terminal 20 can be operated so that the signal transmission and the collision of the type X terminal 20 do not occur repeatedly.
  • the above-described embodiment may be applied to an operation in which a certain terminal 20 sets or allocates transmission resources of another terminal 20. That is, resource setting or allocation may be performed so that the above embodiment is satisfied.
  • the above embodiment is not limited to V2X terminals, and may be applied to terminals that perform D2D communication.
  • the operation according to the above embodiment may be executed only in a specific resource pool.
  • it may be executed only in the resource pool that can be used by the terminal 20 after release 17.
  • the terminal 20 can execute the side link signal transmission so as to reduce the probability of colliding with the side link signal transmission of the terminal 20 that executes the random selection in the side link.
  • 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 D2D communication and 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, etc. transmitted from the base station 10. Further, for example, 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) as D2D communication. 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 Side
  • 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 for establishing an RRC connection with another terminal 20 as described in the embodiment. In addition, the control unit 240 performs processing related to power saving operation. In addition, the control unit 240 performs processing related to HARQ of D2D communication and DL communication. Further, 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. Further, the control unit 240 may schedule D2D communication to another terminal 20. Further, the control unit 240 may autonomously select a resource to be used for D2D communication from the resource selection window based on the sensing result, or may execute re-evaluation or preemption.
  • control unit 240 performs processing related to power saving in transmission / reception of D2D communication. In addition, the control unit 240 performs processing related to inter-terminal cooperation in 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 limited to these I can't.
  • a functional block (component) that functions transmission is called a transmitting unit or a transmitter.
  • the method of realizing each of them is not particularly limited.
  • 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 peripheral devices, a control device, an arithmetic unit, a register, and the like.
  • CPU Central Processing Unit
  • the control unit 140, the control unit 240, and the like described above 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 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, 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 (registered trademark) disk), a smart card, a flash memory (for example, a card, a stick, a key drive), a floppy (registered trademark) disk, 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
  • the terminal 20 can execute the side link signal transmission so as to reduce the probability of collision with the side link signal transmission of the terminal 20 that executes the random selection in the side link. That is, in the direct communication between terminals, the reliability of communication at the time of autonomous resource selection can be improved.
  • the terminal 20 Before selecting a resource in the resource pool, it may further have a receiver that executes sensing. With this configuration, the terminal 20 can execute the side link signal transmission so as to reduce the probability of colliding with the side link signal transmission of the terminal 20 that executes the random selection in the side link.
  • the control unit may set a lower priority than the transmission using the randomly selected resource to the transmission using the selected resource.
  • the terminal 20 can execute the side link signal transmission so as to reduce the probability of colliding with the side link signal transmission of the terminal 20 that executes the random selection in the side link.
  • the control unit may always perform re-evaluation or preemption check on the selected resource.
  • the terminal 20 can execute the side link signal transmission so as to reduce the probability of colliding with the side link signal transmission of the terminal 20 that executes the random selection in the side link.
  • the control unit may select a plurality of resources from the resource pool based on a resource pattern in a predetermined time domain or frequency domain.
  • the terminal 20 can execute the side link signal transmission so as to reduce the probability of colliding with the side link signal transmission of the terminal 20 that executes the random selection in the side link.
  • a control procedure for performing an operation related to transmission collision avoidance and selecting a resource from the resource pool, and the selected resource A communication method is provided in which a terminal executes a transmission procedure for transmitting to another terminal using.
  • the terminal 20 can execute the side link signal transmission so as to reduce the probability of collision with the side link signal transmission of the terminal 20 that executes the random selection in the side link. That is, in the direct communication between terminals, the reliability of communication at the time of autonomous resource selection can be improved.
  • 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, EPROM, 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 where the software uses at least one of wired technology (coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL), etc.) and wireless technology (infrared, microwave, etc.).
  • wired technology coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL), 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 communication between terminals (for example, "side”).
  • the upstream channel, the downstream 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 user terminal described above.
  • 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 connections or connections 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 energy 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” and “second” 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 interval (SCS: SubCarrier Spacing), bandwidth, symbol length, cyclic prefix length, transmission time interval (TTI: Transmission Time Interval), number of symbols per TTI, wireless frame configuration, 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 (OFDM (Orthogonal Frequency Division Multiplexing) symbol, SC-FDMA (Single Carrier Frequency Division Multiple Access) symbol, etc.) in the time region. Slots may be time units based on new melody.
  • 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.
  • a PDSCH (or PUSCH) transmitted in a time unit larger than the minislot may be referred to as a 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.
  • 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

Landscapes

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

Abstract

Ce terminal comprend : une unité de commande qui effectue une opération se rapportant à l'évitement de conflit de transmission dans un groupe de ressources dans lequel une sélection aléatoire de ressources est exécutée, et sélectionne une ressource à partir du groupe de ressources ; et une unité de transmission qui utilise la ressource sélectionnée pour effectuer une transmission vers un autre terminal.
PCT/JP2021/001124 2021-01-14 2021-01-14 Terminal et procédé de communication WO2022153464A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
PCT/JP2021/001124 WO2022153464A1 (fr) 2021-01-14 2021-01-14 Terminal et procédé de communication
CN202180088118.2A CN116711436A (zh) 2021-01-14 2021-01-14 终端以及通信方法

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2021/001124 WO2022153464A1 (fr) 2021-01-14 2021-01-14 Terminal et procédé de communication

Publications (1)

Publication Number Publication Date
WO2022153464A1 true WO2022153464A1 (fr) 2022-07-21

Family

ID=82448041

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2021/001124 WO2022153464A1 (fr) 2021-01-14 2021-01-14 Terminal et procédé de communication

Country Status (2)

Country Link
CN (1) CN116711436A (fr)
WO (1) WO2022153464A1 (fr)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2019531653A (ja) * 2016-09-28 2019-10-31 エルジー エレクトロニクス インコーポレイティド 無線通信システムにおいてリソースを選択しｐｓｃｃｈを伝送する方法及び装置

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2019531653A (ja) * 2016-09-28 2019-10-31 エルジー エレクトロニクス インコーポレイティド 無線通信システムにおいてリソースを選択しｐｓｃｃｈを伝送する方法及び装置

Non-Patent Citations (4)

* Cited by examiner, † Cited by third party
Title
"3rd Generation Partnership Project; Technical Specification Group Radio Access Network; NR; Medium Access Control (MAC) protocol specification (Release 16)", 3GPP DRAFT; DRAFT_38321-G30, 3RD GENERATION PARTNERSHIP PROJECT (3GPP), MOBILE COMPETENCE CENTRE ; 650, ROUTE DES LUCIOLES ; F-06921 SOPHIA-ANTIPOLIS CEDEX ; FRANCE, 21 December 2020 (2020-12-21), Mobile Competence Centre ; 650, route des Lucioles ; F-06921 Sophia-Antipolis Cedex ; France , XP051967043 *
"3rd Generation Partnership Project; Technical Specification Group Radio Access Network; NR; Physical layer procedures for data (Release 16)", 3GPP DRAFT; 38214-G40, 3RD GENERATION PARTNERSHIP PROJECT (3GPP), MOBILE COMPETENCE CENTRE ; 650, ROUTE DES LUCIOLES ; F-06921 SOPHIA-ANTIPOLIS CEDEX ; FRANCE, 5 January 2021 (2021-01-05), Mobile Competence Centre ; 650, route des Lucioles ; F-06921 Sophia-Antipolis Cedex ; France , XP051967565 *
MODERATOR (OPPO): "FL summary for AI 8.11.2.1 – resource allocation for power saving", 3GPP DRAFT; R1-2009584, 3RD GENERATION PARTNERSHIP PROJECT (3GPP), MOBILE COMPETENCE CENTRE ; 650, ROUTE DES LUCIOLES ; F-06921 SOPHIA-ANTIPOLIS CEDEX ; FRANCE, vol. RAN WG1, no. e-Meeting; 20201026 - 20201113, 17 November 2020 (2020-11-17), Mobile Competence Centre ; 650, route des Lucioles ; F-06921 Sophia-Antipolis Cedex ; France , XP051955617 *
NTT DOCOMO, INC.: "Discussion on sidelink resource allocation for power saving", 3GPP DRAFT; R1-2101630, 3RD GENERATION PARTNERSHIP PROJECT (3GPP), MOBILE COMPETENCE CENTRE ; 650, ROUTE DES LUCIOLES ; F-06921 SOPHIA-ANTIPOLIS CEDEX ; FRANCE, vol. RAN WG1, no. e-Meeting; 20210125 - 20210205, 19 January 2021 (2021-01-19), Mobile Competence Centre ; 650, route des Lucioles ; F-06921 Sophia-Antipolis Cedex ; France , XP051971785 *

Also Published As

Publication number Publication date
CN116711436A (zh) 2023-09-05

Similar Documents

Publication Publication Date Title
WO2021152808A1 (fr) Terminal et procédé de communication
WO2022070284A1 (fr) Terminal et procédé de commande de ressources
WO2022153548A1 (fr) Terminal et procédé de communication
WO2022097291A1 (fr) Terminal et procédé de communication
WO2021255808A1 (fr) Terminal et procédé de communication
WO2021181708A1 (fr) Terminal et procédé de communication
WO2021157042A1 (fr) Terminal et procédé de communication
WO2021166268A1 (fr) Terminal et procédé de mesure
WO2021090459A1 (fr) Terminal et procédé de communication
WO2021048990A1 (fr) Terminal
WO2022038952A1 (fr) Terminal et procédé de communication
WO2022085204A1 (fr) Terminal et procédé de communication
WO2021246297A1 (fr) Terminal et procédé de communication
WO2022079782A1 (fr) Terminal, et procédé de communication
WO2022091314A1 (fr) Terminal et procédé de communication
WO2022024330A1 (fr) Terminal et procédé de communication
WO2021205664A1 (fr) Terminal et procédé de communication
WO2021161482A1 (fr) Équipement utilisateur et procédé de communication
WO2021186731A1 (fr) Terminal et procédé de communication
WO2021181709A1 (fr) Terminal et procédé de communication
WO2021181710A1 (fr) Terminal et procédé de communication
WO2021157041A1 (fr) Terminal et procédé de communication
WO2021059539A1 (fr) Terminal et procédé de communication
WO2022153464A1 (fr) Terminal et procédé de communication
WO2022153546A1 (fr) Terminal et procédé de communication

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 21919357

Country of ref document: EP

Kind code of ref document: A1

WWE Wipo information: entry into national phase

Ref document number: 202180088118.2

Country of ref document: CN

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 21919357

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: JP