WO2022038952A1 - 端末及び通信方法 - Google Patents
端末及び通信方法 Download PDFInfo
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- WO2022038952A1 WO2022038952A1 PCT/JP2021/027214 JP2021027214W WO2022038952A1 WO 2022038952 A1 WO2022038952 A1 WO 2022038952A1 JP 2021027214 W JP2021027214 W JP 2021027214W WO 2022038952 A1 WO2022038952 A1 WO 2022038952A1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/04—Wireless resource allocation
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/30—Services specially adapted for particular environments, situations or purposes
- H04W4/40—Services specially adapted for particular environments, situations or purposes for vehicles, e.g. vehicle-to-pedestrians [V2P]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
- H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
- H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
- H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
- H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
- H04L1/1829—Arrangements specially adapted for the receiver end
- H04L1/1861—Physical mapping arrangements
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0053—Allocation of signalling, i.e. of overhead other than pilot signals
- H04L5/0055—Physical resource allocation for ACK/NACK
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/0091—Signalling for the administration of the divided path, e.g. signalling of configuration information
- H04L5/0094—Indication of how sub-channels of the path are allocated
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W24/00—Supervisory, monitoring or testing arrangements
- H04W24/10—Scheduling measurement reports ; Arrangements for measurement reports
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
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- 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
- D2D communication includes D2D discovery (also referred to as 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 by 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).
- EURLLC enhanced Ultra Reliable Low Latency Communication
- the communication quality can be improved by receiving information related to resources to be used from other terminals by cooperation between terminals and executing resource selection or the like based on the information.
- no specific method has been defined as to what information should be shared with other terminals and how.
- the present invention has been made in view of the above points, and an object of the present invention is to improve the efficiency of communication by performing cooperative operation between terminals in direct communication between terminals.
- the transmission unit that transmits the information related to resource selection to another terminal via the resource related to the HARQ (Hybrid automatic repeat request) feedback channel and the information related to the resource selection. It has a receiving unit that receives data from the other terminal via the resource, and the information related to the resource selection is a sensing result, information indicating a resource determined based on the sensing, re-evaluation or reselection. And a terminal containing at least one of the sidelink grants is provided.
- HARQ Hybrid automatic repeat request
- LTE Long Term Evolution
- NR NR
- LAN Local Area Network
- the duplex system may be a TDD (Time Division Duplex) system, an FDD (Frequency Division Duplex) system, or any 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.
- the communication device is mounted on the vehicle, but the embodiment of the present invention is not limited to the embodiment.
- 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 or UL OFDM Orthogonal Frequency Division Multiplexing
- CP-OFDM Cyclic-Prefix OFDM
- DFT-S-OFDM DiscreteFourierTransform-Spread-OFDM
- Transform-precoded OFDM or Transfercoded Any of the OFDMs that are used 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.
- 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.
- the terminal 20A transmits the PSCCH and the PSCH to the terminal 20B using the autonomously selected resource.
- 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. 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. 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 the terminal 20B and the 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.
- the terminal 20A broadcasts to the terminal 20B, the terminal 20C, and the 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 sidelink
- PSCH may be used to transmit HARQ-ACK on the sidelink
- 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. Although there are actually a large number of user devices, FIG. 10 shows the terminal 20A and the terminal 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 does not have to be a device in one housing, and for example, even when various sensors are distributed and arranged in the vehicle, 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 codeword 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) and 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
- step S101 the terminal 20A autonomously selects a resource to be used for PSCCH and PSCH from a 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 / or PSCH using the resource autonomously selected in step S101, and also 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 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 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).
- the terminal 20A may retransmit the PSCCH and the PSCH using an autonomously selected resource.
- 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 a resource to be used for PSCCH and PSCH from a 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 uses the resource autonomously selected in step S201 to transmit SCI by PSCCH and / or PSCH, and also 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.
- 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 is applied, the base station 10 may transmit information indicating a resource of PSFCH 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 is 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 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 PSSCH contains information on the resources of the PSFCH for the terminal 20B to transmit the HARQ-ACK for the reception of the data.
- the information of the resource 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 information of the resource from the DL scheduling DCI or the SL scheduling DCI and SCI. Include in.
- 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.
- steps S304 and S305 may not be executed.
- FIG. 13 is a sequence diagram showing an operation example (4) of V2X.
- the HARQ response is transmitted by PSFCH.
- the PSFCH format for example, the same format as the 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 the PSFCH may be arranged in the symbol at the end of the slot or the multiple 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.
- three subchannels are set in the resource pool, and two PSFCHs are arranged after three slots of 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, performs a group cast to the terminal 20B, the terminal 20C, and the terminal 20D, which are the receiving side terminals 20, via the SL-SCH.
- the terminal 20B uses PSFCH # B
- the terminal 20C uses PSFCH # C
- the terminal 20D uses PSFCH # D to transmit a HARQ response to the terminal 20A.
- FIG. 14 is a diagram showing an example of sensing operation.
- the terminal 20 selects a resource and performs transmission as shown in FIG. As shown in FIG. 14, the terminal 20 performs sensing in a sensing window in the resource pool.
- the terminal 20 receives a resource reservation field included in the SCI transmitted from another terminal 20, and identifies available resource candidates in the resource selection window in the resource pool based on the field. Subsequently, the terminal 20 randomly selects a resource from the available resource candidates. Sensing all the resources in the sensing window may be called full sensing.
- the resource pool setting may have a period.
- the period may be a period of 10240 milliseconds.
- FIG. 14 is an example in which the subframe t 0 SL to the subframe t Tmax SL are set as the resource pool.
- the area of the resource pool in the cycle may be set by, for example, a bitmap.
- the transmission trigger in the terminal 20 is generated in the subframe 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 subframe t n-10 ⁇ Pstep SL to the subframe t n-1 SL . .. If SCI is detected in the sensing window and RSRP exceeds the threshold, the resource in the resource selection window corresponding to the SCI is excluded. Further, when SCI is detected in the sensing window and RSRP is less than the threshold value, the resource in the resource selection window corresponding to the SCI is not excluded.
- 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. ..
- the RSSI of each resource of SA may be measured, and the resource having the smallest RSSI may be added to the set SB.
- the operation of adding the resource having the minimum RSSI included in SA to SB may be repeated until the set of resource candidates SB becomes 20% or more of the resource selection window.
- the lower layer of the terminal 20 may report SB to the upper layer.
- the upper layer of the terminal 20 may execute a random selection for SB to determine the resource to be used.
- the terminal 20 may execute the side link transmission using the determined resource.
- the terminal 20 may use the resource periodically without performing sensing a predetermined number of times (for example, Cresel times).
- the terminal 20 has one or a plurality of sensing windows from the subframe ty-k x Pstep SL having the Y subframe length to the subframe ty + Y-k x Pstep SL , for example, the other terminal 20 has a priority pRX . It is possible to detect that transmission is being performed.
- k may be, for example, a 10-bit bitmap.
- FIG. 15 shows an example in which the third and sixth bits of the bitmap k are set to "1" indicating that partial sensing is performed. That is, in FIG.
- 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 .
- the terminal 20 identifies the resource occupied by another UE, and the resource excluding the resource becomes a usable resource candidate.
- the thresholds Th pTX and pRX set for each resource in the sensing window are increased by 3 dB again.
- Resource identification may be performed. That is, resources that are not excluded because RSRP is less than the threshold value may be increased by increasing the threshold values Th pTX and pRX and executing resource identification again.
- the RSSI of each resource of SA may be measured, and the resource having the smallest RSSI may be added to the set SB. The operation of adding the resource having the minimum RSSI included in SA to SB may be repeated until the set of resource candidates SB becomes 20% or more of the resource selection window.
- the lower layer of the terminal 20 may report SB to the upper layer.
- the upper layer of the terminal 20 may execute a random selection for SB to determine the resource to be used.
- the terminal 20 may execute the side link transmission using the determined resource.
- the terminal 20 may use the resource periodically without performing sensing a predetermined number of times (for example, Cresel times).
- the receiving side terminal 20 detects data transmission from another terminal 20 based on the result of sensing or partial sensing, and the relevant terminal 20 is concerned. Data may be received from another terminal 20.
- 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.
- the communication quality can be improved by sending various information from the terminal 20A to the terminal 20B and operating the terminal 20B based on the information. That is, it is considered effective that not only the resource set but also other information is shared between the terminals 20. However, it was unclear what kind of information should be shared between the terminals 20. Moreover, it was unclear how the information should be shared between the terminals 20. Furthermore, it was unclear how the information shared between the terminals 20 should be used.
- the terminal 20A may transmit information related to resource selection to the terminal 20B via the resource related to the feedback channel.
- FIG. 16 is a sequence diagram showing an example of cooperation between terminals in the embodiment of the present invention.
- the terminal 20A transmits the information related to the resource selection to the terminal 20B via the resource related to the feedback channel.
- the terminal 20B may select a resource based on the received information related to the resource selection, and may transmit, for example, PSCCH / PSSCH to the terminal 20A.
- PSCH may be referred to as data.
- the above “information related to resource selection” may be at least one of the information A) -D) shown below.
- A) Sensing result For example, RSRP (Reference Signal Received Power), RSSI (Received Signal Strength Indicator).
- the terminal 20B may execute re-evaluation or reselection except for at least a part of the resources already reserved (for example, the resource notified by B).
- D) Side link grant The terminal 20B may use the resource indicated by the received side link grant.
- the information related to resource selection is notified, and the terminal 20B performs the resource selection operation based on the information shared from the terminal 20A, so that the probability of resource collision can be reduced.
- the terminal 20B can know the accurate amount of interference.
- the terminal 20B can know the desirable resource to be used by the above B).
- a high cooperative effect is expected when the terminal 20 having the scheduling function of the side link resource executes D).
- the time resource may be the Xth (for example, the second) symbol from the end in the slot for each parameter sl-PSFCH-Period indicating the period of PSFCH.
- the frequency resource may be a PRB determined based on the parameter sl-PSFCH-RB-Set indicating the frequency domain of PSFCH.
- the code resource may be a pair of cyclic shifts determined based on the parameter sl-NumMaxCS-Pair related to the cyclic shift of PSFCH.
- FIG. 17 is a diagram showing an example (1) of resources used for inter-terminal cooperation in the embodiment of the present invention. ..
- resources may be at least a part of PRB other than PRB specified by sl-PSFCH-RB-Set in a certain resource pool. That is, in FIG. 17, the PRB in which the PSFCH associated with the PSSCH is arranged and the PRB frequency-division-multiplexed may be used as resources related to the feedback channel.
- FIG. 18 is a diagram showing an example (2) of resources used for cooperation between terminals in the embodiment of the present invention.
- a cyclic shift pair determined based on sl-NumMaxCS-Pair defined as shown in FIG. 18 may be used as a resource related to the feedback channel, or all cyclic shift pairs may be related to the feedback channel. It may be used as a resource, or a cyclic shift pair determined based on a certain parameter may be used as a resource related to the feedback channel.
- the resource related to the feedback channel may be determined by combining the above method for determining the frequency resource and the above method for determining the code resource. At least a part of the cyclic shift pair other than the cyclic shift pair determined based on sl-NumMaxCS-Pair may be used as a resource related to the feedback channel.
- the cyclic shift (1, 2, 4, 5, 7 not used for HARQ-ACK). , 8, 10, 11) may be used as resources related to the feedback channel.
- the “information related to the resource selection” may be transmitted by any of the methods a), b) or c) shown below.
- the terminal 20A may use a PSFCH resource used for transmission of NACK only and a resource frequency division multiplexing or code division multiplexing.
- FIG. 19 is a diagram showing an example (3) of resources used for cooperation between terminals in the embodiment of the present invention.
- FIG. 19 is an example of using at least a part of code division multiple access cyclic shifts other than the cyclic shift pair determined based on sl-NumMaxCS-Pair as resources related to the feedback channel.
- the cyclic shift indexes 1 and 4 adjacent to the cyclic shift indexes 0 and 3 used for the NACK-only PSFCH resource are used. And / or information related to resource selection may be transmitted.
- FIG. 20 is a diagram showing an example (4) of resources used for cooperation between terminals in the embodiment of the present invention.
- the PRB corresponding to a certain resource used for the PSFCH transmitting the ACK or NACK the frequency division multiplexing PRB to which the PSFCH is not mapped is related to NACK and / or resource selection. It may be used as a resource to send information.
- the quality of retransmission can be improved and the additional operation of the terminal 20 can be reduced.
- the terminal 20A for transmitting "information related to resource selection" may determine when to transmit and / or which resource to transmit.
- the channel allocated to the determined resource may be referred to as PSXCH.
- the PSXCH may be at least one of PSCCH, PSSCH, PSFCH, PSBCH and a new channel.
- the PSXCH is a new channel, for example, the data and DM-RS may be frequency division multiplexed, mapped to a plurality of PRBs, or encoded by Polar coding.
- the terminal 20A that transmits "information related to resource selection" may transmit information related to future resource reservation with a resource that determines when to transmit and / or which resource to transmit. For example, information indicating which PSFCH opportunity is used may be transmitted, or information indicating which frequency resource is used may be transmitted.
- the terminal 20A can transmit "information related to resource selection" at any time.
- the terminal 20A for transmitting "information related to resource selection" may be requested by another terminal 20 when to transmit and / or which resource to transmit.
- the channel allocated to the requested resource may be referred to as PSXCH.
- the PSXCH may be at least one of PSCCH, PSSCH, PSFCH, PSBCH and a new channel.
- the PSXCH is a new channel, for example, the data and DM-RS may be frequency division multiplexed, mapped to a plurality of PRBs, or encoded by Polar coding.
- the PSXCH may be frequency-division-multiplexed and arranged with the PSFCH as shown in FIG.
- the terminal 20A that transmits "information related to resource selection" is a resource requested by another terminal when to transmit and / or which resource to transmit, and information related to future resource reservation is transmitted. May be done. For example, information indicating which PSFCH opportunity is used may be transmitted, or information indicating which frequency resource is used may be transmitted.
- the resource requested by the terminal 20A to transmit the "information related to resource selection" from another terminal when to transmit and / or which resource to transmit is the PSFCH transmission and / or for HARQ feedback.
- PSFCH transmission and / or reception for HARQ feedback may be prioritized, PSFCH transmission and / or information related to reception and resource selection may be transmitted at the same time, or simultaneous transmission.
- a rule for arbitrating is set, and simultaneous transmission may be performed only when the conditions for simultaneous transmission are satisfied, and low-priority transmission may be dropped when the conditions for simultaneous transmission are not satisfied.
- the terminal 20 that performs partial sensing may be a terminal 20 that performs a sensing method different from the total sensing specified in Release 16, or may be a terminal 20 that does not perform sensing, and is limited. It may be a terminal 20 (for example, DRX) that receives only in time.
- full sensing may mean sensing all resources in the sensing window.
- the sensing window may be defined by a slot section [n-T 0 , n-T proc, 0 ], and n may be a slot corresponding to a packet arrival timing.
- the above embodiment is not limited to the V2X terminal, and may be applied to a terminal that performs D2D communication.
- the terminal 20 may know the receivable timing and / or the transmittable timing of the other terminal 20. It may be known by determining the timing in the specifications or preset settings, or it may be known by receiving a notification from another terminal 20.
- Information sharing between terminals in the above-described embodiment may be performed by broadcast, group cast, or unicast. Further, the information sharing between the terminals in the above-described embodiment may be executed only with the terminal for which the RRC connection is established between the terminals. Further, the operation of the terminal 20 in the above-described embodiment may be executed only in a specific resource pool. For example, the operation of the terminal 20 in the above-described embodiment may be executed only in the resource pool available to the terminal 20 after the release 17.
- the information shared between the terminals in the above-described embodiment may be at least one of the information shown in 1) -8) below.
- Sensing result 2) Resources determined based on sensing 3) Re-evaluation or reselection instructions 4) Side link grant 5) Information related to synchronization sources 6) Information on PSFCH opportunities scheduled to be sent and received 7) Coexistence in terminals Information on transmission power reduction due to (in-device coexistence) 8) Information on resources that are reserved but will not be used
- the terminal 20 can efficiently receive the information related to the resource from the other terminal 20 via the resource related to the feedback channel, and can use an appropriate resource at the time of transmission based on the information. ..
- the base station 10 and the terminal 20 include a function for 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.
- 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, etc. to the terminal 20.
- 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. 23 is a diagram showing an example of the functional configuration of the terminal 20.
- the terminal 20 has a transmission unit 210, a reception unit 220, a setting unit 230, and a control unit 240.
- the functional configuration shown in FIG. 23 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 performed.
- 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 NR-PSS, NR-SSS, NR-PBCH, DL / UL / SL control signal, reference signal and the like transmitted from the base station 10. Further, for example, the transmission unit 210 may use PSCCH (Physical Sidelink Control Channel), PSSCH (Physical Sidelink Shared Channel), PSDCH (Physical Sidelink Discovery Channel), PSBCH (Physical Sidelink Broadcast Channel) as D2D communication on another terminal 20. Etc. are transmitted, and the receiving unit 220 receives PSCCH, PSCH, PSDCH, PSBCH, etc. from the other terminal 20.
- PSCCH Physical Sidelink Control Channel
- PSSCH 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.
- the control unit 240 performs processing related to power saving operation.
- 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 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.
- 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 (components) are realized by any combination of at least one of hardware and software. Further, the method of realizing each functional block is not particularly limited. That is, each functional block may be realized using one physically or logically coupled device, or two or more physically or logically separated devices can be directly or indirectly (eg, for example). , 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.
- a functional block (configuration unit) that makes transmission function is called a transmitting unit (transmitting unit) or a transmitter (transmitter).
- the realization method 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. 24 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 in the base station 10 and the terminal 20, by loading predetermined software (program) on the hardware such as the processor 1001 and the storage device 1002, the processor 1001 performs an calculation 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.
- 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. 22 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. 23 may be realized by a control program stored in the storage device 1002 and operated by the processor 1001.
- the various processes described above are executed by one processor 1001, they may be executed simultaneously or sequentially by two or more processors 1001.
- Processor 1001 may be mounted 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 (ReadOnlyMemory), EPROM (ErasableProgrammableROM), EEPROM (ElectricallyErasableProgrammableROM), RAM (RandomAccessMemory), 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 accepts 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 the 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 transmission unit that transmits information related to resource selection to another terminal via a resource related to a HARQ (Hybrid automatic repeat request) feedback channel, and the above. It has a receiving unit that receives data from the other terminal via a resource determined based on the information related to the resource selection, and the information related to the resource selection is determined based on the sensing result and sensing.
- a terminal is provided that includes information indicating the resource, instructions for reassessment or reselection, and at least one of the sidelink grants.
- the terminal 20 can efficiently receive information related to resources from another terminal 20 via the resource related to the feedback channel, and can use an appropriate resource at the time of transmission based on the information. That is, in the direct communication between terminals, it is possible to improve the efficiency of communication by performing cooperative operation between terminals.
- the resource related to the HARQ feedback channel may be a resource that can be used for the feedback channel and a resource that is frequency-division-multiplexed or code-division-multiplexed.
- the terminal 20 can efficiently transmit information related to the resource from the other terminal 20 via the resource related to the feedback channel.
- the transmitting unit may transmit the information related to the resource selection to the other terminal including the information specifying the resource for retransmission.
- the terminal 20 can efficiently transmit information related to the resource from the other terminal 20 via the resource related to the feedback channel, and use an appropriate resource at the time of retransmission.
- the transmitter may transmit the information related to the resource selection to the other terminal by using the resource used for transmitting the HARQ feedback of the negative response and the resource frequency division multiplexing or code division multiplexing. ..
- the terminal 20 can efficiently transmit information related to the resource from the other terminal 20 via the resource related to the feedback channel.
- the terminal executes a receiving procedure for receiving data from the other terminal via the resource determined based on the above, and the information related to the resource selection indicates the sensing result and the resource determined based on the sensing.
- Communication methods are provided that include information, reassessment or reselection instructions, and at least one of the sidelink grants.
- the terminal 20 can efficiently receive information related to resources from another terminal 20 via the resource related to the feedback channel, and can use an appropriate resource at the time of transmission based on the information. That is, in the direct communication between terminals, it is possible to improve the efficiency of communication by performing cooperative operation between terminals.
- 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 appropriate 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 (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, MME, S-GW, etc. are conceivable, but it is clear that it can be done by at least one of these).
- MME, S-GW, etc. are conceivable, but it is clear that it can be done by at least one of these.
- the case where there is one network node other than the base station 10 is illustrated, but the other network node may be a combination of a plurality of other network nodes (for example, MME and S-GW). ..
- 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 comparison of numerical values (for example). , Comparison with a predetermined value).
- Software whether referred to as software, firmware, middleware, microcode, hardware description language, or other names, 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: 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.
- 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 gNodeB
- Base stations are sometimes referred to by terms such as macrocells, small cells, femtocells, and picocells.
- the base station can accommodate one or more (eg, 3) cells. When a base station accommodates multiple cells, the entire base station coverage area 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” is a 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.
- 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.
- 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 referred to as 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 functions 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 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). It may include (eg, searching in a table, database or another data structure), ascertaining as “judgment” or “decision”.
- judgment and “decision” are receiving (for example, receiving information), transmitting (for example, transmitting information), input (input), output (output), and access. It may include (for example, accessing data in memory) to be regarded as “judgment” or “decision”.
- judgment and “decision” are considered to be “judgment” and “decision” when 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 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 applied 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. Therefore, 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.
- the subframe may further be composed 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 applied to at least one of 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, and transmitter / receiver. It may indicate 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.
- 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 domain. Slots may be 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 be composed of one or more symbols in the time domain. Further, the mini slot may be referred to as a sub slot. The minislot may consist of a smaller number of symbols than the slot.
- a PDSCH (or PUSCH) transmitted in time units 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 use different names corresponding to each.
- 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.
- 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.
- TTI shorter than normal TTI may be referred to as shortened TTI, short TTI, partial TTI (partial or fractional TTI), shortened subframe, short subframe, minislot, subslot, slot and the like.
- 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.
- 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.
- the 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.
- RBs common resource blocks
- 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 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”.
- PSFCH is an example of a HARQ feedback channel.
- Base station 110 Transmitter 120 Receiver 130 Setting unit 140 Control unit 20 Terminal 210 Transmitter 220 Receiver 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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Abstract
Description
1)時間領域のリソース配置
2)周波数領域のリソース配置
3)参照する同期信号(SLSS(Sidelink Synchronization Signal)を含む)
4)送信電力制御のためのパスロス測定に用いる参照信号
B)センシングに基づいて決定されたリソース。例えば、使用すべきリソース又は使用するべきでないリソース。
C)再評価又は再選択の指示。既に予約済のリソースのうち、使用すべきリソース又は使用するべきでないリソースが併せて通知されてもよい。端末20Bは、既に予約済のリソースのうち、少なくとも一部のリソース(例えばB)により通知されたリソース)を除いて再評価又は再選択を実行してもよい。
D)サイドリンクグラント。端末20Bは、受信したサイドリンクグラントが示すリソースを使用してもよい。
例えば、時間リソースは、PSFCHの周期を示すパラメータsl-PSFCH-Periodごとのスロットにおける最後からX番目(例えば2番目)のシンボルであってもよい。また、例えば、周波数リソースは、PSFCHの周波数領域を示すパラメータsl-PSFCH-RB-Setに基づいて定まるPRBであってもよい。また、符号リソースは、PSFCHのサイクリックシフトに係るパラメータsl-NumMuxCS-Pairに基づいて定まるサイクリックシフトのペアであってもよい。
図17は、本発明の実施の形態における端末間協調に使用するリソースの例(1)を示す図である。例えば、あるリソースプールにおける、sl-PSFCH-RB-Setで指定されるPRB以外のPRBの少なくとも一部であってもよい。すなわち、図17において、PSSCHに関連付けられるPSFCHが配置されるPRBと、周波数分割多重されるPRBを、フィードバックチャネルに係るリソースとして使用してもよい。また、あるリソースプールにおける、sl-PSFCH-RB-Setで指定されるPRBを、フィードバックチャネルに係るリソースとして使用してもよい。図18は、本発明の実施の形態における端末間協調に使用するリソースの例(2)を示す図である。例えば、図18のように規定されるsl-NumMuxCS-Pairに基づいて決定されるサイクリックシフトペアをフィードバックチャネルに係るリソースとして使用してもよいし、すべてのサイクリックシフトペアをフィードバックチャネルに係るリソースとして使用してもよいし、あるパラメータに基づいて決定されるサイクリックシフトペアをフィードバックチャネルに係るリソースとして使用してもよい。
2)センシングに基づいて決定されたリソース
3)再評価又は再選択の指示
4)サイドリンクグラント
5)同期ソースに関連する情報
6)送受信予定のPSFCH機会に関する情報
7)端末内共存(in-device coexistence)に起因する送信電力削減に関する情報
8)予約したものの使用しない予定のリソースに関する情報
次に、これまでに説明した処理及び動作を実行する基地局10及び端末20の機能構成例を説明する。基地局10及び端末20は上述した実施例を実施する機能を含む。ただし、基地局10及び端末20はそれぞれ、実施例の中の一部の機能のみを備えることとしてもよい。
図22は、基地局10の機能構成の一例を示す図である。図22に示されるように、基地局10は、送信部110と、受信部120と、設定部130と、制御部140とを有する。図22に示される機能構成は一例に過ぎない。本発明の実施の形態に係る動作を実行できるのであれば、機能区分及び機能部の名称はどのようなものでもよい。
図23は、端末20の機能構成の一例を示す図である。図23に示されるように、端末20は、送信部210と、受信部220と、設定部230と、制御部240とを有する。図23に示される機能構成は一例に過ぎない。本発明の実施の形態に係る動作を実行できるのであれば、機能区分及び機能部の名称はどのようなものでもよい。
上記実施形態の説明に用いたブロック図(図22及び図23)は、機能単位のブロックを示している。これらの機能ブロック(構成部)は、ハードウェア及びソフトウェアの少なくとも一方の任意の組み合わせによって実現される。また、各機能ブロックの実現方法は特に限定されない。すなわち、各機能ブロックは、物理的又は論理的に結合した1つの装置を用いて実現されてもよいし、物理的又は論理的に分離した2つ以上の装置を直接的又は間接的に(例えば、有線、無線などを用いて)接続し、これら複数の装置を用いて実現されてもよい。機能ブロックは、上記1つの装置又は上記複数の装置にソフトウェアを組み合わせて実現されてもよい。
以上、説明したように、本発明の実施の形態によれば、リソース選択に係る情報をHARQ(Hybrid automatic repeat request)フィードバックチャネルに係るリソースを介して、他の端末に送信する送信部と、前記リソース選択に係る情報に基づいて決定されたリソースを介して、前記他の端末からデータを受信する受信部とを有し、前記リソース選択に係る情報は、センシング結果、センシングに基づいて決定されたリソースを示す情報、再評価又は再選択の指示、及びサイドリンクグラントの少なくとも一つを含む端末が提供される。
以上、本発明の実施の形態を説明してきたが、開示される発明はそのような実施形態に限定されず、当業者は様々な変形例、修正例、代替例、置換例等を理解するであろう。発明の理解を促すため具体的な数値例を用いて説明がなされたが、特に断りのない限り、それらの数値は単なる一例に過ぎず適切な如何なる値が使用されてもよい。上記の説明における項目の区分けは本発明に本質的ではなく、2以上の項目に記載された事項が必要に応じて組み合わせて使用されてよいし、ある項目に記載された事項が、別の項目に記載された事項に(矛盾しない限り)適用されてよい。機能ブロック図における機能部又は処理部の境界は必ずしも物理的な部品の境界に対応するとは限らない。複数の機能部の動作が物理的には1つの部品で行われてもよいし、あるいは1つの機能部の動作が物理的には複数の部品により行われてもよい。実施の形態で述べた処理手順については、矛盾の無い限り処理の順序を入れ替えてもよい。処理説明の便宜上、基地局10及び端末20は機能的なブロック図を用いて説明されたが、そのような装置はハードウェアで、ソフトウェアで又はそれらの組み合わせで実現されてもよい。本発明の実施の形態に従って基地局10が有するプロセッサにより動作するソフトウェア及び本発明の実施の形態に従って端末20が有するプロセッサにより動作するソフトウェアはそれぞれ、ランダムアクセスメモリ(RAM)、フラッシュメモリ、読み取り専用メモリ(ROM)、EPROM、EEPROM、レジスタ、ハードディスク(HDD)、リムーバブルディスク、CD-ROM、データベース、サーバその他の適切な如何なる記憶媒体に保存されてもよい。
110 送信部
120 受信部
130 設定部
140 制御部
20 端末
210 送信部
220 受信部
230 設定部
240 制御部
1001 プロセッサ
1002 記憶装置
1003 補助記憶装置
1004 通信装置
1005 入力装置
1006 出力装置
Claims (6)
- リソース選択に係る情報をHARQ(Hybrid automatic repeat request)フィードバックチャネルに係るリソースを介して、他の端末に送信する送信部と、
前記リソース選択に係る情報に基づいて決定されたリソースを介して、前記他の端末からデータを受信する受信部とを有し、
前記リソース選択に係る情報は、センシング結果、センシングに基づいて決定されたリソースを示す情報、再評価又は再選択の指示、及びサイドリンクグラントの少なくとも一つを含む端末。 - 前記HARQフィードバックチャネルに係るリソースは、前記フィードバックチャネルに使用可能であるリソースである請求項1記載の端末。
- 前記HARQフィードバックチャネルに係るリソースは、前記フィードバックチャネルに使用可能であるリソースと周波数分割多重又は符号分割多重されるリソースである請求項1記載の端末。
- 前記送信部は、否定的応答のHARQフィードバックを送信するとき、前記リソース選択に係る情報に、再送のためのリソースを指定する情報を含めて前記他の端末に送信する請求項1記載の端末。
- 前記送信部は、否定的応答のHARQフィードバックの送信に使用するリソースと周波数分割多重又は符号分割多重されるリソースを使用して、前記リソース選択に係る情報を前記他の端末に送信する請求項1記載の端末。
- リソース選択に係る情報をHARQ(Hybrid automatic repeat request)フィードバックチャネルに係るリソースを介して、他の端末に送信する送信手順と、
前記リソース選択に係る情報に基づいて決定されたリソースを介して、前記他の端末からデータを受信する受信手順とを端末が実行し、
前記リソース選択に係る情報は、センシング結果、センシングに基づいて決定されたリソースを示す情報、再評価又は再選択の指示、及びサイドリンクグラントの少なくとも一つを含む通信方法。
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