WO2021157041A1 - 端末及び通信方法 - Google Patents
端末及び通信方法 Download PDFInfo
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- WO2021157041A1 WO2021157041A1 PCT/JP2020/004690 JP2020004690W WO2021157041A1 WO 2021157041 A1 WO2021157041 A1 WO 2021157041A1 JP 2020004690 W JP2020004690 W JP 2020004690W WO 2021157041 A1 WO2021157041 A1 WO 2021157041A1
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- H04W72/56—Allocation or scheduling criteria for wireless resources based on priority criteria
- H04W72/566—Allocation or scheduling criteria for wireless resources based on priority criteria of the information or information source or recipient
- H04W72/569—Allocation or scheduling criteria for wireless resources based on priority criteria of the information or information source or recipient of the traffic information
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- 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
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- 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
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- 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
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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).
- the present invention has been made in view of the above points, and an object of the present invention is to determine a process related to transmission when a plurality of transmissions overlap in a wireless communication system.
- the first transmission of a HARQ (Hybrid automatic repeat request) response received from another terminal to the base station and the second transmission to the base station overlap at least in the time domain.
- a control unit that determines at least one of the priority and the priority of each transmission and determines the control related to the first transmission and the second transmission based on the priority, and the control unit based on the determination. It has a transmission unit that executes control related to the first transmission and the transmission of the second transmission, and the control unit changes the control related to determination of the priority of transmission based on the setting related to communication. Terminal is provided.
- the wireless communication system it is possible to determine the processing related to the transmission when a plurality of transmissions overlap.
- 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.
- NR V2X studies are underway to realize large capacity, low delay, high reliability, and Quality of Service (QoS) control.
- LTE or NR V2X it is expected that studies not limited to 3GPP specifications will be promoted in the future. For example, ensuring interoperability, reducing costs by implementing higher layers, using or switching between multiple RATs (Radio Access Technology), supporting regulations in each country, data acquisition, distribution, database management, and LTE or NR V2X platform. It is expected that the usage method will be examined.
- RATs Radio Access Technology
- the communication device is mounted on the vehicle, but the embodiment of the present invention is not limited to this mode.
- the communication device may be a terminal held by a person, the communication device may be a device mounted on a drone or an aircraft, and the communication device may be a base station, an RSU, a relay station (relay node), or the like. It may be a terminal or the like having a scheduling ability.
- SL may be distinguished based on any or combination of UL (Uplink) or DL (Downlink) and the following 1) -4). Further, SL may have another name. 1) Resource allocation in the time domain 2) Resource allocation in the frequency domain 3) Synchronization signal to be referenced (including SLSS (Sidelink Synchronization Signal)) 4) Reference signal used for path loss measurement for transmission power control
- SL may be operated in a multi-carrier environment.
- Mode 3 and Mode 4 are specified regarding the allocation of SL resources to the terminal 20.
- transmission resources are dynamically allocated by DCI (Downlink Control Information) transmitted from the base station 10 to the terminal 20.
- DCI Downlink Control Information
- SPS SemiPersistent Scheduling
- Mode 4 the terminal 20 autonomously selects a transmission resource from the resource pool.
- the slot in the embodiment of the present invention may be read as a symbol, a mini slot, a subframe, a wireless frame, and a TTI (Transmission Time Interval).
- the cell in the embodiment of the present invention may be read as a cell group, a carrier component, a BWP, a resource pool, a resource, a RAT (Radio Access Technology), a system (including a wireless LAN), or the like.
- FIG. 2 is a diagram for explaining an example (1) of the transmission mode of V2X.
- the base station 10 transmits the 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.
- LTE sidelink transmission mode 3 Uu-based sidelink scheduling is performed.
- Uu is a wireless interface between UTRAN (Universal Terrestrial Radio Access Network) and UE (User Equipment).
- the transmission mode of the side link communication shown in FIG. 2 may be referred to as the side link transmission mode 1 in NR.
- FIG. 3 is a diagram for explaining an example (2) of the transmission mode of V2X.
- terminal 20A transmits PSCCH and PSCH to terminal 20B using autonomously selected resources.
- the transmission mode of the side link communication shown in FIG. 3 may be referred to as the side link transmission mode 4 in LTE.
- the UE In the side link transmission mode 4 in LTE, the UE itself executes resource selection.
- FIG. 4 is a diagram for explaining an example (3) of the transmission mode of V2X.
- terminal 20A transmits PSCCH and PSCH to terminal 20B using autonomously selected resources.
- terminal 20B uses autonomously selected resources to transmit PSCCH and PSCH to terminal 20A (step 1).
- the transmission mode of the side link communication shown in FIG. 4 may be referred to as the side link transmission mode 2a in NR.
- the terminal 20 In the side link transmission mode 2 in NR, the terminal 20 itself executes resource selection.
- FIG. 5 is a diagram for explaining an example (4) of the transmission mode of V2X.
- the base station 10 transmits the side link grant to the terminal 20A via the RRC (Radio Resource Control) setting.
- the terminal 20A transmits the PSCH to the terminal 20B based on the received resource pattern (step 1).
- the transmission mode of the side link communication shown in FIG. 5 may be referred to as the side link transmission mode 2c in NR.
- FIG. 6 is a diagram for explaining an example (5) of the transmission mode of V2X.
- the terminal 20A transmits the 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 diagram showing an example (1) of the configuration and operation of the wireless communication system according to the embodiment of the present invention.
- the wireless communication system according to the embodiment of the present invention has a terminal 20A and a terminal 20B.
- FIG. 10 shows terminals 20A and terminals 20B as examples.
- terminal 20 when the terminals 20A, 20B, etc. are not particularly distinguished, they are simply described as “terminal 20" or “user device”.
- 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 present embodiment is not limited to the terminal and the base station, and may be a communication device.
- the terminal 20 is a device mounted on a vehicle such as an automobile, and has a cellular communication function as a UE in LTE or NR and a side link function. There is.
- the terminal 20 may be a general mobile terminal (smartphone or the like). Further, the terminal 20 may be an RSU.
- the RSU may be a UE type RSU having a UE function or a gNB type RSU having a base station device function.
- the terminal 20 does not have to be a device in one housing. For example, even when various sensors are distributed and arranged in the vehicle, the device including the various sensors is the terminal 20.
- the processing content of the transmission data of the side link of the terminal 20 is basically the same as the processing content of UL transmission in LTE or NR.
- the terminal 20 scrambles and modulates the code word of the transmission data to generate complex-valued symbols, maps the complex-valued symbols (transmission signal) to one or two layers, and performs precoding. Then, precoded complex-valued symbols are mapped to resource elements to generate a transmission signal (example: complex-valued time-domain SC-FDMA signal), which is transmitted from each antenna port.
- the base station 10 has a cellular communication function as a base station in LTE or NR, and a function for enabling communication of the terminal 20 in the present embodiment (example: resource pool setting, resource allocation, etc.). have. Further, the base station 10 may be an RSU (gNB type RSU).
- RSU gNB type RSU
- the signal waveform used by the terminal 20 for SL or UL may be OFDMA, SC-FDMA, or other signal waveform. It may be.
- step S101 the terminal 20A autonomously selects the resources to be used for PSCCH and PSCH from the resource selection window having a predetermined period.
- the resource selection window may be set from the base station 10 to the terminal 20.
- step S102 and step S103 the terminal 20A transmits SCI (Sidelink Control Information) by PSCCH and SL data by PSCH using the resource autonomously selected in step S101.
- the terminal 20A may transmit the SCI (PSCCH) using the same time resource as the PSCH time resource and using the frequency resource adjacent to the PSCH frequency resource.
- the terminal 20B receives the SCI (PSCCH) and SL data (PSSCH) transmitted from the terminal 20A.
- the SCI received by the PSCCH may include information on the resources of the PSFCH for the terminal 20B to transmit the HARQ-ACK for receiving the data.
- the terminal 20A may include the information of the resource selected autonomously in the SCI and transmit it.
- step S104 the terminal 20B transmits HARQ-ACK for the received data to the terminal 20A using the resource of the PSFCH specified by the received SCI.
- step S105 the terminal 20A retransmits the PSCCH and PSCH to the terminal 20B when the HARQ-ACK received in step S104 indicates that the retransmission is requested, that is, when it is NACK (negative response).
- Terminal 20A may resend PSCCH and PSCH using autonomously selected resources.
- steps S104 and S105 may not be executed.
- FIG. 11 is a diagram showing an example (2) of the configuration and operation of the wireless communication system according to the embodiment of the present invention. Blind retransmissions without HARQ control may be performed to improve transmission success rate or reach.
- step S201 the terminal 20A autonomously selects the resources to be used for PSCCH and PSCH from the resource selection window having a predetermined period.
- the resource selection window may be set from the base station 10 to the terminal 20.
- the terminal 20A transmits SCI by PSCCH and SL data by PSCH using the resource autonomously selected in step S201.
- the terminal 20A may transmit the SCI (PSCCH) using the same time resource as the PSCH time resource and using the frequency resource adjacent to the PSCH frequency resource.
- step S204 the terminal 20A retransmits the SCI by PSCCH and the SL data by PSCH to the terminal 20B by using the resource autonomously selected in step S201.
- the retransmission in step S204 may be executed a plurality of times.
- step S204 may not be executed.
- FIG. 12 is a diagram showing an example (3) of the configuration and operation of the wireless communication system according to the embodiment of the present invention.
- the base station 10 may perform side link scheduling. That is, the base station 10 may determine the resource of the side link used by the terminal 20 and transmit the information indicating the resource to the terminal 20. Further, when HARQ control is applied, the base station 10 may transmit information indicating at least one of the PSFCH resource and the PUCCH resource to the terminal 20.
- step S301 the base station 10 performs SL scheduling by sending DCI (Downlink Control Information) to the terminal 20A by PDCCH.
- DCI Downlink Control Information
- the DCI for SL scheduling will be referred to as SL scheduling DCI.
- step S301 it is assumed that the base station 10 also transmits DCI for DL scheduling (which may be called DL allocation) to the terminal 20A by PDCCH.
- DCI for DL scheduling (which may be called DL allocation)
- the DCI for DL scheduling will be referred to as DL scheduling DCI.
- the terminal 20A that has received the DL scheduling DCI receives the DL data by PDSCH using the resource specified by the DL scheduling DCI.
- the terminal 20A transmits SCI (Sidelink Control Information) by PSCCH and SL data by PSCH using the resource specified by SL scheduling DCI.
- SCI Servicelink Control Information
- SL scheduling DCI only PSCH resources may be specified.
- the terminal 20A may transmit the SCI (PSCCH) with the same time resource as the PSCH time resource and using the frequency resource adjacent to the PSCH frequency resource.
- SCI may be transmitted at least one of PSCCH and PSCH.
- the terminal 20B receives the SCI (PSCCH) and SL data (PSSCH) transmitted from the terminal 20A.
- the SCI received by the PSCCH may include information on the resources of the PSFCH for the terminal 20B to transmit the HARQ-ACK for receiving the data.
- the 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. May be included 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 using the resource of the PSFCH specified by the received SCI.
- the terminal 20A has a 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 a sidelink HARQ-ACK and a HARQ-ACK for DL data. However, HARQ-ACK for DL data is not included when DL data is not assigned.
- HARQ-ACK of the side link and HARQ-ACK for DL data are not included in the same HARQ-ACK codebook.
- sidelink HARQ-ACK may mean HARQ-ACK corresponding to the sidelink channel and / or resource. More specifically, for example, the base station 10 schedules the terminal 20A, and the terminal 20A transmits a transport block to the terminal 20B by PSCCH / PSSCH. The terminal 20B gives feedback to the terminal 20A regarding the transmission of the transport block in PSCCH / PSCH, and based on this, the terminal 20A gives feedback of HARQ-ACK to the base station 10. For example, the terminal 20A may relay the HARQ-ACK (acknowledgment (ACK) or negative response (NACK: acknowledgment-acknowledgment)) received from the terminal 20B to the base station 10.
- HARQ-ACK acknowledgenowledgment
- NACK acknowledgment-acknowledgment
- steps S304 and S305 may not be executed.
- FIG. 13 is a diagram showing an operation example (4) in the embodiment of the present invention.
- PSFCH Physical Uplink Control Channel
- the PSFCH format 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 differences.
- the format of PSFCH is not limited to this.
- PSFCH resources may be located at the last symbol of the slot, multiple symbols at the end of the slot, or one or more symbols other than the last symbol of the slot. 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, may be arranged in a plurality of symbols at the end of the slot, or may be arranged in one or more symbols other than the end of the slot.
- 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 number of available PSFCH resources is less than the number of receiving terminals 20 belonging to the group, it is necessary to determine how to allocate the PSFCH resources. ..
- the transmitting side terminal 20 may know the number of receiving side terminals 20 in the group cast.
- the uplink transmission carrying the HARQ (Hybrid automatic repeat request) feedback of the side link shown in step S305 of FIG. 12 and the other uplink transmission overlap in the time domain the NR Rel-16 , SL-HARQ-ACK UL transmission and Uu (The Radio interface between UTRAN and the User Equipment) -UCI (Uplink Control Information) are not supported in multiple transmissions in PUCCH or PUSCH.
- overlap mainly corresponds to resource overlap in the time domain, but “overlap” means that resources overlap in at least one of the time domain, the frequency domain, or the code domain. It may correspond to. Note that “overlap” may be replaced with "collision”.
- the UE operation in that case is not clear, although it is not multiplexed as described above. Further, the UE operation when the UL transmission of SL-HARQ-ACK and the PUSCH, PRACH or SRS not including Uu-UCI overlap is not specified. Therefore, it is necessary to specify the UE operation when the UL transmission of SL-HARQ-ACK and another UL transmission overlap.
- the UL transmission of SL-HARQ-ACK in NR and other UL transmissions may be prioritized, and the operation related to the UL transmission may be controlled based on the priority.
- the prioritization of SL-HARQ-ACK UL transmission and other UL transmission in NR may be determined based on at least one of a) -i) shown below.
- the "other UL transmission" may be any one of Uu-UCI (for example, PUCCH, PUSCH), PUSCH (for example, not including Uu-UCI), PRACH or SRS.
- FIG. 14 is a flowchart for explaining an example of transmission processing according to the embodiment of the present invention.
- the terminal 20 detects that the UL transmission of SL-HARQ-ACK overlaps with another UL transmission. Subsequently, the terminal 20 determines the priority of the UL transmission of SL-HARQ-ACK and the priority of other UL transmissions (S502). Subsequently, the terminal 20 determines the process related to UL transmission based on the priority determined in step S502 (S503). Note that step S502 may be executed in advance before step S501.
- FIG. 15 is a diagram showing an example of priority in the embodiment of the present invention.
- the priority order may be determined by parameters X and Y, which indicate the priority in SL transmission.
- the value of the parameter X may be smaller than the value of the parameter Y, that is, the priority indicated by the parameter X may be higher than the priority indicated by the parameter Y.
- the parameter X and the parameter Y may be the parameters of the upper layer or the parameters of the PHY layer.
- the priority of UL transmission of SL-HARQ-ACK may be set, or the priority of UL transmission may be set.
- the priority of UL transmission and the priority of UL transmission of SL-HARQ-ACK may be notified in the upper layer or may be notified in the PHY layer.
- the value representing the priority of UL transmission of SL-HARQ-ACK is a value smaller than the parameter X (that is, a higher priority than the priority indicated by the parameter X), a value equal to or higher than the parameter X and smaller than the parameter Y.
- the priority of UL transmission is that PUSCH / PUCCH such as PRACH and URLLC (Ultra reliable low latency) is “high”, and PUSCH / PUCCH such as SRS (Sounding reference signal) and eMBB (enhanced Mobile Broadband). A setting of "low” may be possible.
- the "priority X” may mean the value of the parameter X, or may mean the priority indicated by the parameter X.
- the “priority Y” may mean the value of the parameter Y, or may mean the priority indicated by the parameter Y.
- the transmission having the next highest priority after "UL transmission of SL-HARQ-ACK having a higher priority than priority X" is "PRACH and high priority (for example, URLLC) PUSCH /. It may be “Uu-UCI”.
- PUSCH / Uu-UCI means at least one transmission of PUSCH and Uu-UCI.
- the transmission having the next highest priority after "PRACH and high priority (for example, URLLC) PUSCH / Uu-UCI" is "lower priority than priority X and higher than priority Y".
- SL-HARQ-ACK having a lower priority than the priority X and a higher priority than the priority Y that is, the value indicating the priority is larger than X and smaller than Y
- the transmission having the next highest priority after "UL transmission of” may be "UL transmission of SL-HARQ-ACK having the same priority as Y (that is, the value indicating the priority is the same as Y)”.
- UL transmission of SL-HARQ-ACK having a lower priority than the priority X and a higher priority than the priority Y that is, the value indicating the priority is larger than X and smaller than Y)”.
- SRS Sounding reference signal
- low priority eg, eMBB
- the transmission having the next highest priority after "SRS and low priority (for example, eMBB) PUSCH / PUCCH” has a lower priority than "priority Y (that is, a value indicating priority). Is larger than Y) "UL transmission of SL-HARQ-ACK" may be used.
- any of SL-HARQ-ACK UL transmission, Uu-UCI, PUSCH or PRACH may always be prioritized.
- operation A4 related to priority the operation will be referred to as “operation A4 related to priority”.
- the priority of UL transmission of SL-HARQ-ACK and the priority of other UL transmission may be the priority notified by either the PHY layer or the upper layer.
- operation A5 related to priority the operation will be referred to as “operation A5 related to priority”.
- the priority of SL transmission corresponding to SL-HARQ-ACK may be the priority notified by the corresponding SCI or the priority notified by the corresponding MAC-PDU (Medium Access Control-Protocol data unit).
- operation A5 related to priority the operation will be referred to as “operation A5 related to priority”.
- operation A6 related to priority PRACH may always be prioritized.
- PUSCH without Aperiodic-CSI or Uu-UCI and SL-HARQ-ACK may always have the same priority.
- PUCCH / PUSCH with SR / CSI and / or without UL-SCH may always be lowered in priority.
- SRS may always be lowered in priority.
- operation A7 related to priority When the parameter X and the parameter Y indicating the priority are higher layer parameters, they may be set in common with the parameters indicating the priority of SL or UL, or may be set separately. Hereinafter, the operation will be referred to as “operation A7 related to priority”.
- the priority can be flexibly set according to the traffic type of the UL transmission of SL-HARQ-ACK and other UL transmissions or the parameters to be set. Also, depending on the communication status, UL transmission can be prioritized based on the importance of the traffic type.
- the corresponding DCI may be prioritized later in the time direction, and the corresponding DCI may be the time only for a specific channel or signal. The latter one may be prioritized in the direction.
- operation B related to priority the operation will be referred to as “operation B related to priority”.
- FIG. 16 is a flowchart for explaining an example (1) of processing related to prioritization in the embodiment of the present invention.
- the operation related to the prioritization may be controlled depending on whether or not there is a DCI corresponding to the SL transmission corresponding to the SL-HARQ-ACK or another UL transmission.
- the operation shown in FIG. 16 is referred to as “operation C related to priority”.
- step S601 the terminal 20 proceeds to step S602 when the DCI corresponding to the transmission is in both the SL transmission corresponding to SL-HARQ-ACK and the other UL transmission, and SL transmission corresponding to SL-HARQ-ACK and If it is in one of the other UL transmissions, the process proceeds to step 603, and if it is not in both the SL transmission corresponding to SL-HARQ-ACK and the other UL transmission, the process proceeds to step S604.
- the DCI corresponding to the transmission may be, for example, transmission by a dynamic grant DCI, or a configured grant type 2 activation or deactivation DCI. It may be transmitted by.
- the transmission corresponding to the DCI for enabling the configured grant type 2 may be only the transmission using the first resource of the periodically allocated resource.
- the transmission corresponding to the DCI of the invalidation of the configured grant type 2 may be, for example, the transmission of an acknowledgment for the invalidation.
- step S602 the terminal 20 may execute any of the following 1) -3). 1) Execute operation A related to priority and / operation B related to priority. 2) Do not assume transmission overlap. 3) Priority is given to the transmission set from the base station 10.
- the terminal 20 may execute any of the following 1) -5). 1) Execute operation A related to the priority. 2) Always give priority to transmission corresponding to DCI. 3) If the priority of SL transmission or other UL transmission with the corresponding DCI is low and the priority of SL transmission or other UL transmission without the corresponding DCI is high, the corresponding DCI exists, SL transmission. Priority is given to SL-HARQ-ACK transmission or other UL transmission corresponding to. 4) No overlap is assumed.
- step S604 the terminal 20 may execute any of the following 1) -3). 1) Execute operation A related to the priority. 2) Always give priority to other UL transmissions. 3) The priority transmission is determined based on the UE implementation (information indicating the priority order may be reported to the base station 10).
- step S602 If the condition for executing step S602 is "when there is a DCI corresponding to both SL transmission and UL transmission corresponding to SL-HARQ-ACK", "SL transmission and UL transmission corresponding to SL-HARQ-ACK are activated. It may be replaced with "when scheduled by a target grant”.
- step S603 If the condition for executing step S603 is "when there is a DCI corresponding to either SL transmission or UL transmission corresponding to SL-HARQ-ACK", "SL transmission and UL transmission corresponding to SL-HARQ-ACK" are satisfied. It may be replaced with "when only one of the above is scheduled by the dynamic grant”.
- the priority is related to the case where the control by the base station 10 is easy and the case where the control is not easy. Efficient communication can be realized by switching the operation.
- FIG. 17 is a flowchart for explaining an example (2) of processing related to prioritization in the embodiment of the present invention. If the UL transmission of SL-HARQ-ACK collides with other UL transmissions such as Uu-UCI and PUSCH / PRACH / SRS, whether to multiplex SL-HARQ-ACK with other UL transmissions based on the priority. Or you may decide whether to drop one.
- the operation shown in FIG. 17 is referred to as “operation D related to priority”.
- step S701 the terminal 20 determines whether or not the priority of the UL transmission of SL-HARQ-ACK and the other UL transmission is different. If the priorities are different (YES in S701), the process proceeds to step S702, and if the priorities are the same (NO in S701), the process proceeds to step S703.
- step S702 the terminal 20 drops the transmission having a low priority, transmits the transmission having a high priority, and ends the flow.
- step S703 it is determined whether or not there is a collision between the UL transmission of SL-HARQ-ACK and the transmission of Uu-UCI. If there is a collision between the UL transmission of SL-HARQ-ACK and the transmission of Uu-UCI or PRACH or SRS (YES in S703), the process proceeds to step S704, and the UL transmission of SL-HARQ-ACK and the Uu-UCI If there is no collision with transmission (NO in S703), the process proceeds to step S705.
- step S704 the terminal 20 transmits one of them, drops the other, and ends the flow.
- step S705 the terminal 20 determines whether or not there is a collision between the UL transmission of SL-HARQ-ACK and the PUSCH transmission that does not include Uu-UCI. If there is a collision between the UL transmission of SL-HARQ-ACK and the PUSCH transmission that does not include Uu-UCI (YES in S705), the process proceeds to step S706, and the UL transmission of SL-HARQ-ACK and Uu-UCI are included. If there is no collision with the PUSCH transmission (NO in S705), the flow is terminated.
- step S706 the terminal 20 multiplexes SL-HARQ-ACK on the PUSCH, transmits the PUSCH, and ends the flow.
- the terminal operation is switched by switching the operation based on the priority. Can be clarified.
- the terminal 20 may perform processing as an error case.
- the operation shown in FIG. 18 is referred to as “operation E related to priority”.
- the UL transmission and the SL transmission corresponding to the UL transmission of SL-HARQ-ACK may be performed by the same carrier or may be performed by different carriers.
- the carrier for UL transmission of SL-HARQ-ACK and the carrier for other UL transmissions such as Uu-UCI and PUSCH / PRACH / SRS may be the same or different.
- the above embodiment is not limited to the V2X terminal, and can be applied to the terminal 20 that supports all side links.
- the terminal 20 when the UL transmission carrying the SL-HARQ-ACK and the UL transmission overlap, the terminal 20 flexibly sets the transmission priority and improves the communication efficiency based on the parameters and the communication settings. Can be determined as
- the wireless communication system it is possible to determine the processing related to the transmission when a plurality of transmissions overlap.
- the base station 10 and the terminal 20 include a function of carrying out the above-described embodiment.
- the base station 10 and the terminal 20 may each have only a part of the functions in the embodiment.
- FIG. 18 is a diagram showing an example of the functional configuration of the base station 10.
- the base station 10 includes a transmission unit 110, a reception unit 120, a setting unit 130, and a control unit 140.
- the functional configuration shown in FIG. 18 is only an example. Any function classification and name of the functional unit may be used as long as the operation according to the embodiment of the present invention can be executed.
- the transmission unit 110 includes a function of generating a signal to be transmitted to the terminal 20 side and transmitting the signal wirelessly.
- the receiving unit 120 includes a function of receiving various signals transmitted from the terminal 20 and acquiring information of, for example, a higher layer from the received signals. Further, the transmission unit 110 has a function of transmitting NR-PSS, NR-SSS, NR-PBCH, DL / UL control signal, DL reference signal and the like to the terminal 20.
- the setting unit 130 stores preset setting information and various setting information to be transmitted to the terminal 20 in the storage device, and reads the setting information from the storage device as needed.
- the content of the setting information is, for example, information related to the setting of D2D communication.
- the control unit 140 performs processing related to the setting for the terminal 20 to perform D2D communication. Further, the control unit 140 transmits the scheduling of the D2D communication and the DL communication to the terminal 20 via the transmission unit 110. Further, the control unit 140 receives information related to the HARQ response of the D2D communication and the DL communication from the terminal 20 via the reception unit 120.
- the function unit related to signal transmission in the control unit 140 may be included in the transmission unit 110, and the function unit related to signal reception in the control unit 140 may be included in the reception unit 120.
- FIG. 19 is a diagram showing an example of the functional configuration of the terminal 20.
- the terminal 20 has a transmitting unit 210, a receiving unit 220, a setting unit 230, and a control unit 240.
- the functional configuration shown in FIG. 19 is only an example. Any function classification and name of the functional unit may be used as long as the operation according to the embodiment of the present invention can be executed.
- the transmission unit 210 creates a transmission signal from the transmission data and wirelessly transmits the transmission signal.
- the receiving unit 220 wirelessly receives various signals and acquires a signal of a higher layer from the received signal of the physical layer. Further, the receiving unit 220 has a function of receiving 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 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 Sidelink
- the setting unit 230 stores various setting information received from the base station 10 or the terminal 20 by the receiving unit 220 in the storage device, and reads it out from the storage device as needed.
- the setting unit 230 also stores preset setting information.
- the content of the setting information is, for example, information related to the setting of D2D communication.
- the control unit 240 controls D2D communication with another terminal 20 as described in the embodiment.
- the control unit 240 performs processing related to HARQ of D2D communication and DL communication.
- the control unit 240 transmits information related to the HARQ response of the D2D communication and the DL communication from the base station 10 to the other terminal 20 scheduled to the base station 10.
- the control unit 240 may schedule D2D communication to another terminal 20.
- the control unit 240 may autonomously select a resource to be used for D2D communication from the resource selection window.
- the control unit 240 controls when UL transmission and SL transmission conflict with each other.
- the function unit related to signal transmission in the control unit 240 may be included in the transmission unit 210, and the function unit related to signal reception in the control unit 240 may be included in the reception unit 220.
- each functional block may be realized by using one device that is physically or logically connected, or directly or indirectly (for example, by two or more devices that are physically or logically separated). , Wired, wireless, etc.) and may be realized using these plurality of devices.
- the functional block may be realized by combining the software with the one device or the plurality of devices.
- Functions include judgment, decision, judgment, calculation, calculation, processing, derivation, investigation, search, confirmation, reception, transmission, output, access, solution, selection, selection, establishment, comparison, assumption, expectation, and assumption.
- broadcasting notifying, communicating, forwarding, configuring, reconfiguring, allocating, mapping, assigning, etc., but only these.
- a functional block that makes transmission function is called a transmitting unit (transmitting unit) or a transmitter (transmitter).
- transmitting unit transmitting unit
- transmitter transmitter
- the base station 10, the terminal 20, and the like in one embodiment of the present disclosure may function as a computer that processes the wireless communication method of the present disclosure.
- FIG. 20 is a diagram showing an example of the hardware configuration of the base station 10 and the terminal 20 according to the embodiment of the present disclosure.
- the above-mentioned base station 10 and terminal 20 are physically configured as a computer device including a processor 1001, a storage device 1002, an auxiliary storage device 1003, a communication device 1004, an input device 1005, an output device 1006, a bus 1007, and the like. May be good.
- the word “device” can be read as a circuit, device, unit, etc.
- the hardware configuration of the base station 10 and the terminal 20 may be configured to include one or more of the devices shown in the figure, or may be configured not to include some of the devices.
- the processor 1001 For each function of the base station 10 and the terminal 20, the processor 1001 performs an operation by loading predetermined software (program) on the hardware such as the processor 1001 and the storage device 1002, and controls the communication by the communication device 1004. It is realized by controlling at least one of reading and writing of data in the storage device 1002 and the auxiliary storage device 1003.
- Processor 1001 operates, for example, an operating system to control the entire computer.
- the processor 1001 may be composed of a central processing unit (CPU: Central Processing Unit) including an interface with a peripheral device, a control device, an arithmetic unit, a register, and the like.
- CPU Central Processing Unit
- control unit 140, control unit 240, and the like may be realized by the processor 1001.
- the processor 1001 reads a program (program code), a software module, data, or the like from at least one of the auxiliary storage device 1003 and the communication device 1004 into the storage device 1002, and executes various processes according to these.
- a program program that causes a computer to execute at least a part of the operations described in the above-described embodiment is used.
- the control unit 140 of the base station 10 shown in FIG. 18 may be realized by a control program stored in the storage device 1002 and operated by the processor 1001.
- the control unit 240 of the terminal 20 shown in FIG. 19 may be realized by a control program stored in the storage device 1002 and operated by the processor 1001.
- Processor 1001 may be implemented by one or more chips.
- the program may be transmitted from the network via a telecommunication line.
- the storage device 1002 is a computer-readable recording medium, 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
- HARQ Hybrid automatic repeat request
- the control unit has a control unit and a transmission unit that executes control related to the transmission of the first transmission and the second transmission based on the determination, and the control unit transmits based on the setting related to communication.
- a terminal is provided that changes the control related to the determination of the priority of.
- the terminal 20 flexibly sets the transmission priority and improves the communication efficiency based on the parameters and communication settings. Can be decided. That is, in the wireless communication system, it is possible to determine the processing related to the transmission when a plurality of transmissions overlap.
- the setting related to the communication may be one or a plurality of parameters indicating the priority of the first transmission, the priority of the second transmission, and the priority for the first transmission.
- the plurality of parameters are composed of a first parameter and a second parameter having a lower priority than the first parameter, and the second transmission priority is the first priority and the first priority.
- the terminal 20 can flexibly set the transmission priority and improve the communication efficiency based on the parameters and communication settings. Can be decided.
- the setting related to the communication may be whether or not there is downlink control information corresponding to the first transmission or the second transmission.
- the control related to the transmission drops the transmission having the lower priority to execute the transmission having the higher priority, and when the priority of the first transmission and the priority of the second transmission are the same,
- the operation may be controlled based on the second transmission type.
- the terminal performs a control procedure for determining which transmission is prioritized and a transmission procedure for executing transmission control of the first transmission and the second transmission based on the determination.
- a communication method is provided in which the control procedure is executed and includes a procedure for changing the control related to the determination of the priority of transmission based on the setting related to the communication.
- the terminal 20 flexibly sets the transmission priority and improves the communication efficiency based on the parameters and communication settings. Can be decided. That is, in the wireless communication system, it is possible to determine the priority transmission when a plurality of transmissions overlap.
- the boundary of the functional unit or the processing unit in the functional block diagram does not always correspond to the boundary of the physical component.
- the operation of the plurality of functional units may be physically performed by one component, or the operation of one functional unit may be physically performed by a plurality of components.
- the processing order may be changed as long as there is no contradiction.
- the base station 10 and the terminal 20 have been described with reference to functional block diagrams, but such devices may be implemented in hardware, software, or a combination thereof.
- the software operated by the processor of the base station 10 according to the embodiment of the present invention and the software operated by the processor of the terminal 20 according to the embodiment of the present invention are random access memory (RAM), flash memory, and read-only memory, respectively. It may be stored in (ROM), EPROM, EEPROM, registers, hard disk (HDD), removable disk, CD-ROM, database, server or any other suitable storage medium.
- information notification includes physical layer signaling (for example, DCI (Downlink Control Information), UCI (Uplink Control Information)), higher layer signaling (for example, RRC (Radio Resource Control) signaling, MAC (Medium Access Control) signaling, etc. Broadcast information (MIB (Master Information Block), SIB (System Information Block)), other signals, or a combination thereof may be used.
- RRC signaling may be referred to as an RRC message, for example, RRC. It may be a connection setup (RRCConnectionSetup) message, an RRC connection reconfiguration (RRCConnectionReconfiguration) message, or the like.
- Each aspect / embodiment described in the present disclosure includes LTE (Long Term Evolution), LTE-A (LTE-Advanced), SUPER 3G, IMT-Advanced, 4G (4th generation mobile communication system), and 5G (5th generation mobile communication).
- system FRA (Future Radio Access), NR (new Radio), W-CDMA (registered trademark), GSM (registered trademark), CDMA2000, UMB (Ultra Mobile Broadband), IEEE 802.11 (Wi-Fi (registered trademark)) )), LTE 802.16 (WiMAX®), IEEE 802.20, UWB (Ultra-WideBand), Bluetooth®, and other systems that utilize suitable systems and have been extended based on these. It may be applied to at least one of the next generation systems. Further, a plurality of systems may be applied in combination (for example, a combination of at least one of LTE and LTE-A and 5G).
- the specific operation performed by the base station 10 in the present specification may be performed by its upper node.
- various operations performed for communication with the terminal 20 are performed by the base station 10 and other network nodes other than the base station 10 (for example, it is clear that it can be done by at least one of (but not limited to, MME, S-GW, etc.).
- the other network node may be a combination of a plurality of other network nodes (for example, MME and S-GW). ..
- the information, signals, etc. described in the present disclosure can be output from the upper layer (or lower layer) to the lower layer (or upper layer). Input / output may be performed via a plurality of network nodes.
- the input / output information and the like may be stored in a specific location (for example, memory) or may be managed using a management table. Input / output information and the like can be overwritten, updated, or added. The output information and the like may be deleted. The input information or the like may be transmitted to another device.
- the determination in the present disclosure may be made by a value represented by 1 bit (0 or 1), by a boolean value (Boolean: true or false), or by comparing numerical values (for example,). , Comparison with a predetermined value).
- Software whether referred to as software, firmware, middleware, microcode, hardware description language, or by any other name, is an instruction, instruction set, code, code segment, program code, program, subprogram, software module.
- Applications, software applications, software packages, routines, subroutines, objects, executables, execution threads, procedures, features, etc. should be broadly interpreted.
- software, instructions, information, etc. may be transmitted and received via a transmission medium.
- a transmission medium For example, a website that uses at least one of wired technology (coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL: Digital Subscriber Line), etc.) and wireless technology (infrared, microwave, etc.).
- wired technology coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL: Digital Subscriber Line), etc.
- wireless technology infrared, microwave, etc.
- the information, signals, etc. described in this disclosure may be represented using any of a variety of different techniques.
- data, instructions, commands, information, signals, bits, symbols, chips, etc. that may be referred to throughout the above description are voltages, currents, electromagnetic waves, magnetic fields or magnetic particles, light fields or photons, or any of these. It may be represented by a combination of.
- a channel and a symbol may be a signal (signaling).
- the signal may be a message.
- the component carrier CC: Component Carrier
- CC Component Carrier
- system and “network” used in this disclosure are used interchangeably.
- the information, parameters, etc. described in the present disclosure may be expressed using absolute values, relative values from predetermined values, or using other corresponding information. It may be represented.
- the radio resource may be one indicated by an index.
- base station Base Station
- wireless base station base station
- base station fixed station
- NodeB nodeB
- eNodeB eNodeB
- gNodeB gNodeB
- access point “ transmission point ”,“ reception point ”,“ transmission / reception point ”,“ cell ”,“ sector ”,“ Terms such as “cell group”, “carrier”, and “component carrier” can be used interchangeably.
- Base stations are sometimes referred to by terms such as macrocells, small cells, femtocells, and picocells.
- the base station can accommodate one or more (for example, three) cells.
- a base station accommodates multiple cells, the entire coverage area of the base station can be divided into multiple smaller areas, each smaller area being a base station subsystem (eg, a small indoor base station (RRH:)).
- Communication services can also be provided by Remote Radio Head).
- the term "cell” or “sector” refers to part or all of the coverage area of at least one of the base stations and base station subsystems that provide communication services in this coverage. Point to.
- MS Mobile Station
- UE User Equipment
- Mobile stations can be used by those skilled in the art as subscriber stations, mobile units, subscriber units, wireless units, remote units, mobile devices, wireless devices, wireless communication devices, remote devices, mobile subscriber stations, access terminals, mobile terminals, wireless. It may also be referred to as a terminal, remote terminal, handset, user agent, mobile client, client, or some other suitable term.
- At least one of the base station and the mobile station may be called a transmitting device, a receiving device, a communication device, or the like. At least one of the base station and the mobile station may be a device mounted on the mobile body, the mobile body itself, or the like.
- the moving body may be a vehicle (for example, a car, an airplane, etc.), an unmanned moving body (for example, a drone, an autonomous vehicle, etc.), or a robot (manned or unmanned type). ) May be.
- at least one of the base station and the mobile station includes a device that does not necessarily move during communication operation.
- at least one of the base station and the mobile station may be an IoT (Internet of Things) device such as a sensor.
- IoT Internet of Things
- the base station in the present disclosure may be read by the user terminal.
- the communication between the base station and the user terminal is replaced with the communication between a plurality of terminals 20 (for example, it may be called D2D (Device-to-Device), V2X (Vehicle-to-Everything), etc.).
- D2D Device-to-Device
- V2X Vehicle-to-Everything
- Each aspect / embodiment of the present disclosure may be applied to the configuration.
- the terminal 20 may have the function of the base station 10 described above.
- words such as "up” and “down” may be read as words corresponding to communication between terminals (for example, "side”).
- an uplink channel, a downlink channel, and the like may be read as a side channel.
- the user terminal in the present disclosure may be read as a base station.
- the base station may have the functions of the 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 connection or connection between the elements may be physical, logical, or a combination thereof.
- connection may be read as "access”.
- the two elements use at least one of one or more wires, cables and printed electrical connections, and, as some non-limiting and non-comprehensive examples, the radio frequency domain. Can be considered to be “connected” or “coupled” to each other using electromagnetic energies having wavelengths in the microwave and light (both visible and invisible) regions.
- the reference signal can also be abbreviated as RS (Reference Signal), and may be called a pilot (Pilot) depending on the applicable standard.
- RS Reference Signal
- Pilot Pilot
- references to elements using designations such as “first” 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 spacing (SCS: SubCarrier Spacing), bandwidth, symbol length, cyclic prefix length, transmission time interval (TTI: Transmission Time Interval), number of symbols per TTI, wireless frame configuration, and transceiver.
- SCS SubCarrier Spacing
- TTI Transmission Time Interval
- TTI Transmission Time Interval
- transceiver At least one of a specific filtering process performed in the frequency domain, a specific windowing process performed by the transceiver in the time domain, and the like may be indicated.
- the slot may be composed of one or more symbols in the time domain (OFDM (Orthogonal Frequency Division Multiplexing) symbol, SC-FDMA (Single Carrier Frequency Division Multiple Access) symbol, etc.). Slots may be in time units based on numerology.
- OFDM Orthogonal Frequency Division Multiplexing
- SC-FDMA Single Carrier Frequency Division Multiple Access
- the slot may include a plurality of mini slots. Each minislot may consist of one or more symbols in the time domain. Further, the mini slot may be referred to as a sub slot. A minislot may consist of a smaller number of symbols than the slot.
- PDSCH (or PUSCH) transmitted in time units larger than the minislot may be referred to as PDSCH (or PUSCH) mapping type A.
- the PDSCH (or PUSCH) transmitted using the minislot may be referred to as the 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 the 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 set BWPs may be active, and the terminal 20 does not have to assume that a predetermined signal / channel is transmitted / 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, minislots 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 in a slot, the number of symbols and RBs contained in a slot or minislot, and the number of RBs.
- the number of subcarriers, the number of symbols in the TTI, the symbol length, the cyclic prefix (CP: Cyclic Prefix) length, and other configurations 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.
- the UL transmission of SL-HARQ-ACK in the present disclosure is an example of the first transmission.
- Another UL transmission is an example of a second transmission.
- Parameter X is an example of the first parameter.
- Parameter Y is an example of the second parameter.
- DCI is an example of downlink control information.
- Base station 110 Transmission unit 120 Reception unit 130 Setting unit 140 Control unit 20 Terminal 210 Transmission unit 220 Reception unit 230 Setting unit 240 Control unit 1001 Processor 1002 Storage device 1003 Auxiliary storage device 1004 Communication device 1005 Input device 1006 Output device
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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)PHYレイヤSL優先度
c)PHYレイヤUL優先度
d)上位レイヤSL優先度
e)上位レイヤUL優先度
f)ULチャネル又はシグナル
g)SLスケジューリングタイプ
h)ULスケジューリングタイプ
i)スケジューリングタイミング
1)優先順位に係る動作A及び/優先順位に係る動作Bを実行する。
2)送信のオーバラップを想定しない。
3)基地局10から設定された送信を優先する。
1)優先順位に係る動作Aを実行する。
2)DCIに対応する送信を常に優先する。
3)対応するDCIが存在するSL送信又は他のUL送信の優先度が低く、対応するDCIが存在しないSL送信又は他のUL送信の優先度が高い場合、対応するDCIが存在する、SL送信に対応するSL-HARQ-ACK送信又は他のUL送信を優先する。
4)オーバラップを想定しない。
1)優先順位に係る動作Aを実行する。
2)他のUL送信を常に優先する。
3)UE実装に基づいて優先する送信を決定する(基地局10に優先順を示す情報を報告してもよい)。
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18は、基地局10の機能構成の一例を示す図である。図18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18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19は、端末20の機能構成の一例を示す図である。図19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19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18及び図19)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、他の端末から受信したHARQ(Hybrid automatic repeat request)応答を基地局に送信する第1の送信と、基地局への第2の送信とが、少なくとも時間領域でオーバラップする場合、各送信の優先度及び優先順位の少なくとも一方を決定し、優先度に基づいて前記第1の送信及び前記第2の送信に係る制御を決定する制御部と、前記決定に基づいて、前記第1の送信及び前記第2の送信の送信に係る制御を実行する送信部とを有し、前記制御部は、通信に係る設定に基づいて、送信の優先順位の決定に係る制御を変更する端末が提供される。
1)前記第1のパラメータよりも優先度が高い前記第1の送信
2)前記第1の優先度を有する前記第2の送信及び前記第1のパラメータと優先度が同一の前記第1の送信
3)前記第1のパラメータよりも優先度が低く前記第2のパラメータよりも優先度が高い前記第1の送信
4)前記第2のパラメータと優先度が同一の前記第1の送信及び前記第2の優先度を有する前記第2の送信
5)前記第2のパラメータよりも優先度が低い前記第1の送信
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)
- 他の端末から受信したHARQ(Hybrid automatic repeat request)応答を基地局に送信する第1の送信と、基地局への第2の送信とが、少なくとも時間領域でオーバラップする場合、各送信の優先度及び優先順位の少なくとも一方を決定し、優先度に基づいて前記第1の送信及び前記第2の送信に係る制御を決定する制御部と、
前記決定に基づいて、前記第1の送信及び前記第2の送信の送信に係る制御を実行する送信部とを有し、
前記制御部は、通信に係る設定に基づいて、送信の優先順位の決定に係る制御を変更する端末。 - 前記通信に係る設定は、前記第1の送信の優先度と、前記第2の送信の優先度と、前記第1の送信に対する優先度を示す1又は複数のパラメータとである請求項1記載の端末。
- 前記複数のパラメータは、第1のパラメータ及び前記第1のパラメータよりも優先度が低い第2のパラメータから構成され、
前記第2の送信の優先度は、第1の優先度及び前記第1の優先度よりも優先度が低い第2の優先度とを含み、
前記制御部は、以下1)-5)に示される順で、優先度が低くなる送信であると決定する請求項2記載の端末。
1)前記第1のパラメータよりも優先度が高い前記第1の送信
2)前記第1の優先度を有する前記第2の送信及び前記第1のパラメータと優先度が同一の前記第1の送信
3)前記第1のパラメータよりも優先度が低く前記第2のパラメータよりも優先度が高い前記第1の送信
4)前記第2のパラメータと優先度が同一の前記第1の送信及び前記第2の優先度を有する前記第2の送信
5)前記第2のパラメータよりも優先度が低い前記第1の送信 - 前記通信に係る設定は、前記第1の送信又は前記第2の送信に対応する下り制御情報があるか否かである請求項1記載の端末。
- 前記送信に係る制御は、前記優先度が低い送信をドロップして前記優先度が高い送信を実行し、前記第1の送信の優先度と前記第2の送信の優先度が同じ場合には、前記第2の送信の種別に基づいて動作を制御する請求項1から4いずれか一項に記載の端末。
- 他の端末から受信したHARQ(Hybrid automatic repeat request)応答を基地局に送信する第1の送信と、基地局への第2の送信とが、少なくとも時間領域でオーバラップする場合、各送信の優先度及び優先順位の少なくとも一方を決定する制御手順と、
前記決定に基づいて、前記第1の送信及び前記第2の送信の送信制御を実行する送信手順とを端末が実行し、
前記制御手順は、通信に係る設定に基づいて、送信の優先順位の決定に係る制御を変更する手順を含む通信方法。
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