WO2020143062A1 - Procédé de communication sans fil et terminal - Google Patents

Procédé de communication sans fil et terminal Download PDF

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Publication number
WO2020143062A1
WO2020143062A1 PCT/CN2019/071492 CN2019071492W WO2020143062A1 WO 2020143062 A1 WO2020143062 A1 WO 2020143062A1 CN 2019071492 W CN2019071492 W CN 2019071492W WO 2020143062 A1 WO2020143062 A1 WO 2020143062A1
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WIPO (PCT)
Prior art keywords
cbg
terminal
feedback
information
indication information
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PCT/CN2019/071492
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English (en)
Chinese (zh)
Inventor
赵振山
卢前溪
林晖闵
Original Assignee
Oppo广东移动通信有限公司
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Application filed by Oppo广东移动通信有限公司 filed Critical Oppo广东移动通信有限公司
Priority to PCT/CN2019/071492 priority Critical patent/WO2020143062A1/fr
Priority to CN201980054523.5A priority patent/CN112586031A/zh
Publication of WO2020143062A1 publication Critical patent/WO2020143062A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/02—Traffic management, e.g. flow control or congestion control
    • H04W28/04—Error control

Definitions

  • Embodiments of the present application relate to the field of communication technologies, and in particular, to a wireless communication method and terminal.
  • the IoV system is a sidelink (SL) transmission technology based on the terminal-to-device (D2D) transmission method, and the communication data in the traditional long-term evolution (LTE) system passes through the base station The way of receiving or sending is different.
  • the IoV system uses direct terminal-to-terminal communication, so it has higher spectrum efficiency and lower transmission delay.
  • a feedback channel is introduced on the SL, that is, the terminal at the receiving end according to the detected physical side control channel (Physical Sidelink Control Channel, PSCCH), physical side shared channel (Physical Sidelink Shared Channel, PSSCH), Send feedback information to the sending terminal, and the sending terminal determines whether to retransmit data to the terminal according to the received feedback information.
  • PSCCH Physical Sidelink Control Channel
  • PSSCH Physical Sidelink Shared Channel
  • feedback information can be sent based on Transport Block (TB). If part of the data in TB is received correctly and the rest of the data is not received correctly, the receiving terminal will send a negative acknowledgment to the sending terminal. , NACK), the sending terminal needs to retransmit the TB, resulting in a waste of resources.
  • Transport Block TB
  • Embodiments of the present application provide a wireless communication method and terminal, which can avoid waste of resources.
  • a wireless communication method including: a first terminal receives a first transmission block TB sent by a second terminal using a first side link; the first terminal uses a second side link to transmit The second terminal sends feedback information for the first TB, and the feedback information is feedback information based on the coding block group CBG.
  • a wireless communication method including: a second terminal uses a first side link to send a first transmission block TB to the first terminal; the second terminal receives the first terminal and uses a second Feedback information for the first TB sent by the side link, the feedback information is feedback information based on the coding block group CBG.
  • a terminal is provided for performing the method in the first aspect or the second aspect.
  • the terminal includes a functional module for performing the method in the first aspect or the second aspect.
  • a terminal including a processor and a memory.
  • the memory is used to store a computer program
  • the processor is used to call and run the computer program stored in the memory to execute the method in the first aspect or the second aspect.
  • a chip is provided for implementing the method in the first aspect or the second aspect.
  • the chip includes a processor for calling and running a computer program from the memory, so that the device installed with the chip executes the method as described in the first aspect or the second aspect.
  • a computer-readable storage medium for storing a computer program that causes a computer to execute the method in the first aspect or the second aspect.
  • a computer program product including computer program instructions, which cause the computer to execute the method in the first aspect or the second aspect.
  • a computer program which when run on a computer, causes the computer to execute the method in the first aspect or the second aspect described above.
  • a TB can be divided into at least one CBG, the receiving terminal (that is, the first terminal) can separately send feedback information according to the reception status of each CBG, and the sending terminal (that is, the second terminal) can be based on the feedback of each CBG Information, retransmit the CBG that is not correctly received by the receiving terminal, and the CBG that is correctly received can be used without retransmission, which can reduce the resource overhead of retransmission and improve the transmission efficiency of the system.
  • FIG. 1 is a schematic diagram of a V2X communication mode provided by an embodiment of the present application.
  • FIG. 2 is a schematic diagram of a PSCCH resource pool and a PSSCH resource pool provided by an embodiment of the present application.
  • FIG. 3 is a schematic diagram of a V2X communication mode provided by an embodiment of the present application.
  • FIG. 4 is a schematic diagram of a wireless communication method provided by an embodiment of the present application.
  • FIG. 5 is a schematic diagram of a wireless communication method provided by an embodiment of the present application.
  • FIG. 6 is a schematic diagram of CBG feedback and retransmission based on an embodiment of the present application.
  • FIG. 7 is a schematic diagram of a correspondence relationship between feedback resources and CBGs provided by an embodiment of the present application, and SCI indication feedback resources.
  • FIG. 8 is a schematic diagram of a V2X communication method provided by an embodiment of the present application.
  • FIG. 9 is a schematic diagram of a positional relationship between resource positions occupied by data and feedback resource positions provided by an embodiment of the present application.
  • FIG. 10 is a schematic diagram of a positional relationship between resource positions occupied by data and feedback resource positions provided by an embodiment of the present application.
  • FIG. 11 is a schematic diagram of a terminal provided by an embodiment of the present application.
  • FIG. 12 is a schematic diagram of another terminal provided by an embodiment of the present application.
  • FIG. 13 is a schematic diagram of a terminal provided by an embodiment of the present application.
  • FIG. 14 is a schematic diagram of a chip provided by an embodiment of the present application.
  • 15 is a schematic diagram of a communication system provided by an embodiment of the present application.
  • GSM Global Mobile System
  • CDMA Code Division Multiple Access
  • WCDMA Wideband Code Division Multiple Access
  • GPRS General Packet Radio Service
  • LTE Long Term Evolution
  • FDD Frequency Division Duplex
  • TDD Time Division Duplex
  • UMTS Universal Mobile Telecommunication System
  • GSM Global Mobile System
  • WiMAX Worldwide Interoperability for Microwave Access, WiMAX
  • the network device mentioned in the embodiment of the present application may be a device that communicates with a terminal device (or referred to as a communication terminal or terminal).
  • the network device can provide communication coverage for a specific geographic area, and can communicate with terminal devices located in the coverage area.
  • the network device 110 may be a base station (Base Transceiver Station, BTS) in a GSM system or a CDMA system, a base station (NodeB, NB) in a WCDMA system, or an evolved base station in an LTE system (Evolutional Node B, eNB or eNodeB), or gNB in a new wireless system, or a wireless controller in a Cloud Radio Access Network (CRAN), or the network device can be a mobile switching center, Relay stations, access points, in-vehicle devices, wearable devices, hubs, switches, bridges, routers, network side devices in 5G networks or network devices in future public land mobile networks (Public Land Mobile Network, PLMN), etc. .
  • BTS Base
  • the terminal devices mentioned in the embodiments of the present application include, but are not limited to, connections via wired lines, such as via Public Switched Telephone Networks (PSTN), Digital Subscriber Lines (DSL), digital cables, and direct cable connections ; And/or another data connection/network; and/or via wireless interfaces, such as for cellular networks, wireless local area networks (Wireless Local Area Network, WLAN), digital TV networks such as DVB-H networks, satellite networks, AM- FM broadcast transmitter; and/or another terminal device configured to receive/transmit communication signals; and/or Internet of Things (IoT) equipment.
  • a terminal device set to communicate through a wireless interface may be referred to as a "wireless communication terminal", “wireless terminal", or "mobile terminal".
  • Examples of mobile terminals include, but are not limited to, satellite or cellular telephones; Personal Communication Systems (PCS) terminals that can combine cellular radiotelephones with data processing, facsimile, and data communication capabilities; may include radiotelephones, pagers, Internet/internal PDA with networked access, web browser, notepad, calendar, and/or Global Positioning System (GPS) receiver; and conventional laptop and/or palm-type receivers or others including radiotelephone transceivers Electronic device.
  • Terminal equipment can refer to access terminal, user equipment (User Equipment), user unit, user station, mobile station, mobile station, remote station, remote terminal, mobile device, user terminal, terminal, wireless communication device, user agent or User device.
  • Access terminals can be cellular phones, cordless phones, Session Initiation Protocol (SIP) phones, wireless local loop (Wireless Local Loop, WLL) stations, personal digital processing (Personal Digital Assistant (PDA), wireless communication Functional handheld devices, computing devices, or other processing devices connected to wireless modems, in-vehicle devices, wearable devices, terminal devices in 5G networks, or terminal devices in PLMNs that will evolve in the future, etc.
  • SIP Session Initiation Protocol
  • WLL Wireless Local Loop
  • PDA Personal Digital Assistant
  • V2X Vehicle to Everything
  • Mode 3 The transmission resources of the vehicle-mounted terminal are allocated by the base station, and the vehicle-mounted terminal transmits data on the side link according to the resources allocated by the base station; the base station can allocate a single transmission to the terminal through the downlink (Downlink, DL) Resources can also allocate semi-statically transmitted resources to the terminal.
  • the in-vehicle terminal adopts the transmission mode of sensing + reservation.
  • the vehicle-mounted terminal obtains a set of available transmission resources by listening in the resource pool, and the terminal randomly selects a resource from the set for data transmission. Because the services in the IoV system have periodic characteristics, the terminal usually adopts a semi-static transmission method, that is, after the terminal selects a transmission resource, it will continue to use the resource in multiple transmission cycles, thereby reducing resource reselection and The probability of resource conflicts.
  • the terminal will carry the information reserved for the next transmission in the control information transmitted this time, so that other terminals can determine whether this resource is reserved and used by the user by detecting the user's control information, so as to reduce resource conflicts purpose.
  • the data transmitted by the sidelink can adopt the sidelink control information (Sidelink Control Information) (SCI) + data transmission method, where the sideline control information carries what is needed to demodulate the data Information, such as modulation and coding strategy (Modulation and Coding Scheme, MCS), time-frequency resource allocation information, priority information, etc., the receiving terminal obtains the time-frequency resource location of the data by detecting the side control information, and at the corresponding time The data is detected on the frequency resource.
  • the sideline control information can be carried on the PSCCH, and the data can be carried on the PSSCH.
  • the PSCCH resource pool and the PSSCH resource pool are pre-configured or network-configured.
  • the sending terminal sends PSCCH and PSSCH in the corresponding resource pool, and the receiving end The terminal first blindly detects the PSCCH in the PSCCH resource pool, and according to the indication information in the SCI carried by the PSCCH, detects the PSSCH corresponding to the SCI on the corresponding time-frequency resource in the PSSCH resource pool.
  • the PSCCH resource pool and the PSSCH resource pool may be as shown in FIG. 2.
  • NR-V2X In NR-V2X, it can support automatic driving, so it puts forward higher requirements for data interaction between vehicles, such as higher throughput, lower delay, higher reliability, greater coverage, More flexible resource allocation, etc.
  • Mode 1 can be the network to allocate transmission resources for the terminal (similar to Mode 3 in LTE-V2X), and Mode 2 can be selected by the terminal Transmission resources are divided into the following sub-modes in Mode 2.
  • Sub-mode 1 The terminal autonomously selects transmission resources (similar to Mode 4 in LTE-V2X); for example, the first terminal autonomously selects resources in a pre-configured or network-configured resource pool (the resources can be selected randomly, or (Select resources by listening)
  • Sub-mode 2 The terminal assists other terminals in selecting resources; for example, one of the terminals sends auxiliary information to other terminals.
  • the auxiliary information may include (but not limited to): available time-frequency resource information, available transmission resource set information, channel measurement Information and channel quality information (such as channel state information (Channel State Information, CSI), channel quality information (Channel Quality Information, CQI), precoding matrix index (Precoding Matrix Index, PMI), rank indicator (Rank Indicator, RI) , Reference signal reception power (Reference Signal Receiving Power, RSRP), reference signal reception quality (Reference Signal Receiving Quality, RSRQ), received signal strength indication (Received Signal Strength Strength Indication, RSSI), road loss information, etc.).
  • channel state information Channel State Information, CSI
  • channel quality information Channel Quality Information, CQI
  • Precoding Matrix Index, PMI precoding Matrix Index
  • rank indicator rank Indicator, RI
  • Reference signal reception power Reference Signal Receiving Power, RSRP
  • reference signal reception quality
  • Sub-mode 3 The terminal selects resources among the transmission resources configured for it; for example, the network configures transmission resources for each terminal, and when the terminal has side data transmission, the transmission resources configured by the network are used for data transmission.
  • Sub-mode 4 The terminal allocates transmission resources to other terminals; for example, one of the terminals is the group head of group communication, the other terminal is a member of the group, and the one terminal directly allocates time-frequency resources for side link transmission to other terminals .
  • UE1, UE2, and UE3 form a communication group.
  • UE1 is the leader of the group and has functions such as resource management, allocation, and control.
  • UE2/UE3 is a group member, and UE1 can be assigned to UE2/UE3.
  • UE2 and UE3 perform sidelink transmission on the resources allocated by UE1.
  • sub-modes are only schematic illustrations, and there may be other transmission modes in the actual network, which are not limited to these sub-modes, or only some of the transmission modes are supported in the actual network.
  • the receiving terminal sends feedback information to the sending terminal according to the detected PSCCH or PSSCH, and the sending terminal determines whether to retransmit data to the terminal based on the received feedback information.
  • the embodiments of the present application provide the following ways to avoid wasting resources without reducing transmission reliability.
  • the feedback information in the embodiment of the present application may be NACK (also called Hybrid Automatic Repeat Request (HARQ)-NACK) or ACKnowledgment (ACK) (also called HARQ-ACK). It can also be applied to the transmission of other feedback information, for example, CSI or beam feedback.
  • NACK also called Hybrid Automatic Repeat Request (HARQ)-NACK
  • ACK nowledgment
  • inventions mentioned in this application can be used in V2X scenes, and can also be used in other D2D scenes.
  • FIG. 4 is a schematic flowchart of a wireless communication method 100 according to an embodiment of the present application.
  • the method 100 may be executed by the first terminal.
  • the method 100 may include at least part of the following content.
  • the first terminal receives the first TB sent by the second terminal using the first side link
  • the first terminal uses the second side link to send feedback information for the first TB to the second terminal, the feedback information is based on a coding block group (Coding Block Group, CBG) Feedback.
  • CBG Coding Block Group
  • FIG. 5 is a schematic flowchart of a wireless communication method 200 according to an embodiment of the present application.
  • the method 200 may be executed by the second terminal.
  • the method 200 may include at least part of the following content.
  • the second terminal uses the first side link to send the first TB to the first terminal.
  • the second terminal receives feedback information for the first TB sent by the first terminal using the second side link, and the feedback information is feedback information based on CBG.
  • a TB may be divided into at least one CBG, and the receiving terminal (that is, the first terminal) may separately send feedback information according to the reception status of each CBG, and the sending terminal (that is, the second terminal) may be based on each
  • the CBG feedback information retransmits the CBG that has not been correctly received by the receiving terminal, and the correctly received CBG does not need to be retransmitted, thereby reducing the resource overhead of retransmission and improving the transmission efficiency of the system.
  • a TB can be divided into 4 CBGs, namely CBG1, CBG2, CBG3, and CBG4.
  • the receiving terminal can send feedback information according to the reception status of each CBG, for example, CBG4 and CBG4 in FIG.
  • the feedback information of CBG2 is NACK
  • the feedback information of CBG1 and CBG3 is ACK
  • the sending terminal can determine that CBG4 and CBG2 need to be retransmitted according to the feedback information sent by the receiving terminal, and then retransmit CBG2 and CBG4.
  • the feedback information based on CBG may be carried through the PSSCH, and at this time, the feedback information of each CBG of the TB may be carried in the PSSCH.
  • the first terminal may carry CBG-based feedback information through the PSCCH.
  • the feedback information may be carried in the SCI corresponding to the data.
  • the SCI may carry CBG-based feedback information. It may carry information required for demodulating data, and when the first terminal has no data transmission, only feedback information may be carried on the PSCCH.
  • the first terminal may carry the feedback information based on CBG through a side link feedback channel (Physical Sidelink Feedback Channel, PSFCH).
  • PSFCH Physical Sidelink Feedback Channel
  • the feedback information of each CBG of the TB may be carried in the PSFCH.
  • the feedback information may also be carried in a sequence.
  • the feedback information is carried by a first sequence.
  • the first terminal may carry the feedback information of each CBG included in the TB through a first sequence.
  • the second terminal may determine the feedback information of each CBG included in the TB based on the first sequence.
  • a TB since a TB includes multiple CBGs, there may be two cases of feedback information for each CBG: ACK and NACK. If the number of CBGs included in the TB is N, there may be N for the number of reception cases that may be 2 for the TB Power.
  • the above-mentioned first sequence can characterize one of the 2 N-th power reception cases.
  • the first terminal may select the one first sequence from a sequence set according to the reception situation of the CBG included in the first TB. Different sequences in the sequence set may correspond to different reception situations of CBG included in a single TB.
  • the first terminal may select a sequence from the sequence set according to the receiving condition of the first TB to characterize the receiving condition of the first TB. For the second terminal, according to the received first sequence, the reception status of the first TB is determined.
  • the first terminal and the second terminal may separately store the correspondence between each sequence in the sequence set and the reception status of the TB. Then, the first terminal may select the first sequence from the sequence set according to the correspondence and the reception of the first TB, and the second terminal may determine the reception of the first TB according to the correspondence and the received first sequence .
  • different sequences correspond to different combinations of ACK and NACK of CBG included in a single TB.
  • the sequence included in the sequence set may be a combination of ACK and NACK of each CBG and ACK and NACK of other CBGs.
  • a TB includes multiple CBGs, and feedback information of each CBG may have two cases of ACK and NACK.
  • the number of CBGs included in the TB is N
  • the number of possible reception cases for the TB may be 2 To the Nth power.
  • the number of sequences included in the sequence set may be the Nth power of 2
  • the number of information bits included in the sequence may be equal to N, that is, may be equal to the number of CBGs included in the TB.
  • log 2 T represents the number of information bits included in the sequence or the number of CBG included in TB, where T is the number of sequences included in the sequence set.
  • a TB can be divided into up to 4 CBGs, then a sequence set can be configured, which includes 2 to the fourth power, a total of 16 sequences, respectively corresponding to 16 reception conditions, the first terminal according to the 4 to be fed back
  • the status information of HARQ-ACK/NACK of CBG is selected from the sequence set for feedback transmission.
  • a predefined sequence set includes 4 sequences
  • a TB includes 2 CBGs
  • each CBG corresponds to a different HARQ ACK or HARQ NACK
  • the correspondence between sequence indexes and feedback information is shown in Table 1 below.
  • CBG0, CBG1 Sequence index Feedback information 0 0 (ACK, ACK) 0 1 (ACK, NACK)
  • the sequence included in the sequence set may be a combination of ACK and NACK of each CBG and ACK and NACK of other CBGs.
  • the embodiments of the present application are not limited to this, and may have other implementation manners.
  • different sequences in the sequence set correspond to different NACK cases of CBG included in a single TB.
  • the feedback sequence may not be sent.
  • the sequence included is the ACK and NACK of each CBG and the ACK and NACK of other CBGs.
  • the number of CBGs included in TB is N
  • the number of sequences included in the sequence set is 2 to the Nth power minus one.
  • a sequence set may be configured, and the sequence set may include 3 sequences, one of which is used to indicate that the feedback information of only CBG0 is NACK, and the other is to indicate that the feedback information of only CBG1 is
  • NACK a sequence indicates that the feedback information of CBG0 and CBG1 are both NACK.
  • the correspondence between the sequence index and the feedback information may be as shown in Table 2 below.
  • Sequence index Feedback information (CBG0, CBG1) 0 0 (NACK, default is ACK) 0 1 (The default is ACK, NACK) 1 0 (NACK, NACK)
  • different sequences correspond to different positive acknowledgement ACK conditions of CBG included in a single TB.
  • the feedback sequence may not be sent.
  • the sequence included is the ACK and NACK of each CBG and the ACK and NACK of other CBGs.
  • the number of CBGs included in the TB is N
  • the number of sequences included in the sequence set is 2 to the Nth power minus one.
  • a sequence set may be configured, and the sequence set may include 3 sequences, one of which is used to indicate that the feedback information of only CBG0 is ACK, and the other is used to indicate that the feedback information of only CBG1 is
  • a sequence indicates that the feedback information of CBG0 and CBG1 are both ACK.
  • the correspondence between the sequence index and the feedback information may be as shown in Table 3 below.
  • Sequence index Feedback information (CBG0, CBG1) 0 0 (ACK, default is NACK) 0 1 (The default is NACK, ACK) 1 0 (ACK, ACK)
  • the above sequence set may be preset, configured on the network side, or configured by other terminals, where the other terminal may be the group head of the terminal group to which the first terminal belongs.
  • the correspondence between each sequence in the sequence set and the reception status of the TB may be preset, configured on the network side, or configured by other terminals, where the other terminals may be the first The group header of the terminal group to which the terminal belongs.
  • the feedback information includes feedback information of at least part of the CBG of the first TB, and different CBGs in the first TB correspond to different feedback resources.
  • the feedback information of different CBGs included in the TB may be fed back through different feedback resources, and the second terminal may determine the feedback information of the CBG corresponding to the feedback resources according to the received feedback information on the different feedback resources.
  • one TB may include four CBGs, namely CBG1, CBG2, CBG3, and CBG4, and the feedback resources corresponding to the four CBGs may be feedback resource 1, feedback resource 2, feedback resource 3, feedback resource 4 If the first terminal sends feedback information on the feedback resource 1, then it can be known that the feedback information corresponds to CBG1.
  • the sequence for indicating NACK corresponding to each CBG can be the same, and the sequence for indicating ACK corresponding to each CBG can be the same.
  • the number of sequences for indicating feedback information may be small, for example, sequence 0 represents ACK, and sequence 1 represents NACK.
  • two sequences can be defined to correspond to HARQ-ACK and HARQ-NACK respectively. If multiple-bit HARQ-ACK/NACK feedback for CBG is to be supported, feedback information for different CBGs can be derived from different feedback resources. Bearer.
  • the feedback information is carried by a second sequence; and the second sequence indicates NACK information without indicating ACK information, or the second sequence indicates ACK information without indicating NACK information.
  • the second sequences corresponding to different CBGs are the same.
  • the first terminal when performing feedback, the first terminal only needs to send the feedback sequence on the feedback resource corresponding to the CBG whose feedback information is NACK. If the second terminal detects a feedback sequence on a feedback resource, it is considered that the CBG corresponding to the feedback resource has not been correctly received and needs to be retransmitted, and if no feedback sequence is detected on a feedback resource, the feedback sequence is considered The CBG corresponding to the resource is correctly received without retransmission.
  • the feedback resources employed by the first terminal may be the same as the feedback resources employed by other terminals in the terminal group to which the first terminal belongs.
  • the group header detects HARQ-NACK on the resource, you can determine that there are group members in the group that did not receive the data correctly, that is, retransmit the data; if the group header does not detect HARQ-NACK on the resource, the default is all The members of the group have received the data correctly and will not retransmit the data.
  • multiple feedback resources may still be used, and different feedback resources correspond to different CBGs to support CBG-based feedback.
  • the first terminal performs feedback information, it only needs to send the feedback sequence on the feedback resource corresponding to the CBG whose feedback information is ACK, and if the second terminal detects the feedback sequence on a certain feedback resource, the CBG corresponding to the feedback resource is considered It is received correctly and does not need to be retransmitted. If no feedback sequence is detected on a certain feedback resource, it is considered that the CBG corresponding to the feedback resource has not been received correctly and needs to be retransmitted.
  • the feedback information is carried by the PSFCH
  • each PSFCH carries the feedback information of one CBG
  • the feedback information of different CBGs is carried by the PSFCH of different feedback resources.
  • only 1 bit of feedback information is carried on the PSFCH, corresponding to ACK or NACK.
  • one TB may include four CBGs, namely CBG1, CBG2, CBG3, and CBG4, and the feedback resources corresponding to the four CBGs may be feedback resource 1, feedback resource 2, feedback resource 3, feedback resource 4 If the first terminal sends the PSFCH on the feedback resource 1, at this time, it can be known that the feedback information carried by the PSFCH corresponds to the feedback information of CBG1.
  • the PSFCH sent on each feedback resource only needs to carry the feedback information of one CBG, for example, the feedback information is ACK or NACK, The feedback information only needs 1 bit.
  • the above-mentioned different feedback resources may be different in at least one of the following dimensions of resources: time-domain resources, code-domain resources, and frequency domains Resources, airspace resources.
  • the first terminal receives the first indication information; based on the first indication information, the feedback resource corresponding to each CBG in the at least part of the CBG is determined for sending each CBG The corresponding feedback information.
  • the first indication information may come from the second terminal (that is, the sending terminal), or from other terminals (such as the group head of the terminal group to which the first terminal belongs), or may also come from the network side .
  • the first indication information comes from the group header of the second terminal or the terminal group to which the first terminal belongs, it may be indicated by the SCI carried in the PSCCH, or indicated by the data in the PSSCH.
  • the first indication information comes from the network side, it may be indicated by a broadcast message, a radio resource control (Radio Resource Control, RRC) message, or downlink control information (Downlink Control Information, DCI).
  • RRC Radio Resource Control
  • DCI Downlink Control Information
  • the first indication information may optionally carry information of feedback resources of each CBG of a single TB.
  • a TB is divided into 4 CBGs, and the SCI carries resource indication information, indicating 4 time-frequency resources, corresponding to 4 CBGs, and on each time-frequency resource, the CBG correspondence is fed back through a sequence.
  • HARQ-ACK or HARQ-NACK information is fed back through a sequence.
  • the first indication information indicates a feedback resource set, which is used by the first terminal to select a feedback resource corresponding to each CBG in at least part of the CBG.
  • the feedback resource set may include resources in at least one of the following dimensions: time-domain resources, frequency-domain resources, code-domain resources, and air-domain resources. If only some of the dimensions of the resource are indicated, for different CBGs, the resources used in other dimensions may be the same.
  • the first terminal may determine the feedback resources corresponding to each CBG from the feedback resource set according to the first criterion.
  • a feedback sequence needs to occupy a time domain symbol, 4 physical resource blocks (Physical Resource Block, PRB), the second terminal sends a TB, the TB includes 4 CBG, then the second terminal can indicate a time by SCI Domain symbol, and indicates 16 PRBs on the time domain symbol, and the first terminal selects corresponding resources from the 16 PRBs as feedback resources for each CBG according to the CBG index information. For example, in the order of PRB index from low to high, the first 4 PRBs are used to transmit feedback information of the first CBG, the next 4 PRBs are used to transmit feedback information of the second CBG, and so on.
  • PRB Physical Resource Block
  • the frequency domain resources are continuous, and the embodiments of the present application are not limited thereto.
  • the resource set may include multiple discrete resources, and each discrete resource may have an index.
  • Index and CBG index information for example, according to the order of the index from low to high, the first resource is used for the feedback of the first CBG, the second resource is used for the feedback of the second CBG, and so on.
  • the first indication information carries information of the feedback resources of the partial CBG of a single TB, and is used to determine the feedback resources of the partial CBG and/or the feedback resources of other partial CBG based on the information of the feedback resources of the partial CBG.
  • the first indication information may carry information of feedback resources of one CBG, and feedback resources of other CBGs may be determined based on the second criterion and the feedback resources of the one CBG.
  • the second criterion may be preset, configured by the network side, or configured by the group head of the terminal group to which the first terminal belongs.
  • four transmission resources starting from the feedback resource of the one CBG can be used as the feedback transmission resources corresponding to the four CBGs.
  • the first terminal may determine the feedback corresponding to each CBG in the at least part of the CBG based on the resources occupied by the first side link and/or the third side link Resources for sending the feedback information corresponding to each CBG, wherein the third side link carries side control information SCI corresponding to the first side link.
  • the at least part of the CBG may be determined based on the resources occupied by the first side link and/or the third side link, and the correspondence between the resources occupied by the side link and the feedback resources Feedback resources corresponding to each CBG.
  • the corresponding relationship is optionally preset, configured by the network side, or configured by the group head of the terminal group to which the first terminal belongs
  • the feedback resources of the CBG may be determined according to time-domain resources and/or frequency-domain resources occupied by the first side link and/or the third side link.
  • the time domain position of the feedback resource is based on the time domain position of one of the first side link and the third side link
  • the frequency domain position of the feedback resource is based on the first side link and The third side link depends on the frequency domain position of the other.
  • the time-domain position and the frequency-domain position of the feedback resource are determined based on the first side link.
  • the time domain position of the feedback resource is determined based on the first side link, and the frequency domain position is preset or configured by the network or configured by other terminals, and vice versa.
  • the time domain position and frequency domain position of the feedback resource are determined based on the third side link.
  • the time domain position of the feedback resource is determined based on the third side link, and the frequency domain position is preset or configured by the network or configured by other terminals, and vice versa.
  • the time domain position mentioned above may be at the slot level or the symbol level. If the time domain position at the slot level is determined based on the first side link and/or the third side link, specific sampling Which symbol can be preset or configured by the network or configured by other terminals.
  • the frequency domain resource size of the feedback information may be a predefined size, or the same as the frequency domain size of the PSSCH (or PSCC). Therefore, the feedback resource can be determined according to the transmission resource of the PSSCH (or PSCCH).
  • the feedback resource and the PSSCH have the same frequency domain starting position and the same frequency domain size.
  • the PSSCH is sent in time slot n, and the feedback information is sent in the last time domain symbol of time slot n+1.
  • the corresponding relationship adopted may be the resource position of the side link and the feedback resource of each CBG Correspondence of location.
  • the correspondence has specified how the feedback resources of CBG0, CBG1, CBG2, etc. correspond to the resource positions of the side links.
  • the correspondence relationship adopted above may be a correspondence relationship between a side link and a feedback resource of a certain CBG.
  • the feedback resources of the other CBGs can be determined according to certain criteria.
  • the first feedback resource (feedback for CBG) may be determined according to the resource location of the first side link and/or the third side link, and the criterion may be continuous from the first feedback resource N feedback resources are used for N CBG feedback resources.
  • the transmission resource of the feedback channel corresponding to the first CBG can be determined according to the resource position of the first side link, that is, the transmission resource of feedback 1 in FIG. 10, and according to the corresponding criteria, the feedback from feedback 1 can be determined.
  • the four consecutive transmission resources of the same size starting from the transmission resources are used as the four feedback resources, respectively corresponding to the four CBGs of the data.
  • the CBG feedback resource can be determined based on the first indication information, and the CBG feedback resource can be determined based on the resource location of the first side link and/or the third side link.
  • the CBG feedback resource may also be determined based on the first indication information and/or the resource location of the first side link and/or the third side link.
  • the time domain resource of the feedback resource may be determined based on the first indication information, and the frequency domain resource of the feedback resource may be determined based on the starting position of the frequency domain resource of the first side link and/or the third side link Starting position.
  • the time domain resource of the feedback resource may be determined based on the first indication information, and the frequency domain resource length of the feedback resource may be determined based on the frequency domain resource length of the first side link and/or the third side link.
  • the frequency domain resource of the feedback resource may be determined based on the first indication information, and the time slot of the feedback resource may be determined based on the time slot of the first side link and/or the third side link.
  • the symbol-level resource location of the feedback resource may be determined based on the first indication information, and the slot-level resource location of the feedback resource may be determined based on the resource location of the first side link and/or the third side link .
  • the first terminal may perform CBG-based feedback, and whether the first terminal performs CBG-based feedback may be preset or may be indicated by indication information.
  • the first terminal may receive second indication information that indicates CBG-based feedback for the first TB.
  • the second indication information may be sent by the second terminal, may be configured by the network side, or may be configured by the group head of the terminal group to which the first terminal belongs.
  • the second indication information may be sent in real time, that is to say, whether to perform CBG-based feedback for each TB.
  • the second indication information may also be sent by a semi-static message.
  • the second indication information indicates that before receiving the second indication information again, it is determined whether to target the TB based on the currently received indication of the second indication information. Perform feedback based on CBG.
  • the second indication information may be carried in PSCCH or PSSCH.
  • the PSCCH or PSSCH may be sent by the second terminal, or may be sent by the group header of the terminal group to which the first terminal belongs.
  • the second indication information is carried in the PSCCH, and the second indication information is carried by the information field in the SCI in the PSCCH and/or the scrambling sequence of the SCI.
  • the SCI may be an SCI corresponding to the first TB, used for the first terminal to demodulate the first TB, or may be an SCI corresponding to another TB.
  • the SCI includes a first information field, where the information field is 0 indicates TB-based feedback, and the information field is 1 indicates CBG-based feedback.
  • scrambling the SCI through the first scrambling code sequence represents TB-based feedback
  • scrambling the SCI through the second scrambling code sequence represents CBG-based feedback
  • the second indication information is carried in the PSSCH, and the second indication information is carried in the data in the PSSCH.
  • the data mentioned here may be the above-mentioned first TB or other TB.
  • the second indication information is carried in broadcast information sent by the network, radio resource control RRC signaling, or downlink control information DCI.
  • a TB can include at most multiple CBGs. However, whether the data of each CBG is included in the currently transmitted data can be notified to the first terminal by way of indication information.
  • the first terminal receives third indication information, and the third indication information indicates the transmission status of CBG in the first TB.
  • the sending situation may indicate which CBGs are sent, or may only indicate the number of CBGs sent.
  • the third indication information is carried in the PSCCH, and the third indication information is carried in the information field of the SCI in the PSCCH.
  • the SCI includes a first information field, which is used to indicate CBG information.
  • the first information field is a bit map, one bit corresponds to one CBG, and the length of the bit map corresponds to the maximum number of CBGs included in one TB.
  • a TB can be divided into 4 CBGs at most, and the SCI includes a 4-bit bitmap.
  • the value of this bitmap is 1111, and the bits correspond to CBG0 and CBG1 from right to left, respectively.
  • CBG2, CBG3, if CBG1 and CBG3 receive errors, the terminal only needs to retransmit the data corresponding to CBG1 and CBG3 when retransmitting, and the bitmap in SCI is set to 1010.
  • the third indication information may also be carried in the PSSCH or in a message sent by the network side.
  • the embodiments of the present application are described by taking the feedback information as ACK or NACK as an example.
  • the embodiments of the present application may also be used in other scenarios, for example, feedback of channel state information or feedback for beams.
  • the first TB may be replaced with at least one channel or cell, or at least one transmission beam.
  • the terminal 300 includes a communication unit 310.
  • the communication unit 310 is configured to: receive a first transmission block TB sent by a second terminal using a first side link; send feedback information for the first TB to the second terminal using a second side link The feedback information is based on the feedback information of the coding block group CBG.
  • a first sequence carries feedback information of each CBG of the first TB.
  • the terminal 300 further includes a processing unit 320, which is used to:
  • the one first sequence is selected from the sequence set.
  • different sequences in the sequence set correspond to different reception situations of CBG included in a single TB.
  • different sequences correspond to different negative acknowledgement NACK conditions of CBG included in a single TB;
  • Different sequences correspond to different positive acknowledgment ACK conditions of CBG included in a single TB; or,
  • Different sequences correspond to different combinations of ACK and NACK of CBG included in a single TB.
  • the sequence set is preset, configured on the network side, or configured on a terminal other than the terminal.
  • the feedback information includes feedback information of at least part of the CBG of the first TB, and different CBGs in the first TB correspond to different feedback resources.
  • the communication unit 310 is further configured to: receive first indication information
  • the terminal further includes a processing unit 320, configured to: based on the first indication information, determine a feedback resource corresponding to each CBG in the at least part of the CBG, for sending the feedback information corresponding to each CBG .
  • the first indication information carries information of feedback resources of each CBG of a single TB.
  • the first indication information indicates a feedback resource set, which is used by the terminal to select a feedback resource corresponding to each CBG in the at least part of the CBG.
  • the first indication information carries information of feedback resources of a part of CBG of a single TB, and is used to determine the feedback resources of the part of CBG based on the information of the feedback resources of the part of CBG and /Or other feedback resources of CBG.
  • the terminal further includes a processing unit 320, which is used to:
  • the third side link carries side control information SCI corresponding to the first side link.
  • the terminal further includes a processing unit 320, which is used to:
  • each CBG in the at least part of the CBG corresponds Feedback resources.
  • the correspondence relationship is preset, configured on the network side, or configured on other terminals than the terminal.
  • the feedback resources used by the terminal are the same as the feedback resources used by other terminals in the terminal group to which the terminal belongs.
  • the feedback information is carried through the second sequence
  • the second sequence indicates NACK information without indicating ACK information, or the second sequence indicates ACK information without indicating NACK information.
  • the communication unit 310 is further used to:
  • the second indication information is carried in the physical side link control channel PSCCH, through the information field in the SCI in the PSCCH and/or the scrambling sequence of the SCI Carrying the second indication information; or,
  • the second indication information is carried in the physical side link shared channel PSSCH, and the second indication information is carried by the data in the PSSCH; or,
  • the second indication information is carried in broadcast information sent by the network, radio resource control RRC signaling, or downlink control information DCI.
  • the communication unit 310 is further used to:
  • the third indication information indicating the transmission status of the CBG in the first TB.
  • the third indication information is carried in the PSCCH, and the third indication information is carried in the information field of the SCI in the PSCCH.
  • the terminal 300 may implement the corresponding operations implemented by the first terminal in the above method embodiments, and for the sake of brevity, no further details are provided here.
  • the terminal 400 includes a communication unit 410.
  • the communication unit 410 is configured to: send the first transmission block TB to the first terminal by using the first side link; receive feedback information for the first TB sent by the first terminal by using the second side link The feedback information is based on the feedback information of the coding block group CBG.
  • a first sequence carries feedback information of each CBG of the first TB.
  • the one first sequence belongs to a sequence set.
  • different sequences in the sequence set correspond to different reception situations of CBG included in a single TB.
  • different sequences correspond to different negative acknowledgement NACK conditions of CBG included in a single TB;
  • Different sequences correspond to different positive acknowledgment ACK conditions of CBG included in a single TB; or,
  • Different sequences correspond to different combinations of ACK and NACK of CBG included in a single TB.
  • the feedback information includes feedback information of at least part of the CBG of the first TB, and different CBGs in the first TB correspond to different feedback resources.
  • the communication unit 410 is further used to:
  • the first indication information is used by the first terminal to determine a feedback resource corresponding to each CBG in the at least part of the CBG.
  • the first indication information carries information of feedback resources of each CBG of a single TB.
  • the first indication information indicates a feedback resource set, which is used by the first terminal to select a feedback resource corresponding to each CBG in the at least part of the CBG.
  • the first indication information carries information of feedback resources of a part of CBG of a single TB, and is used by the first terminal to determine the part based on information of feedback resources of the part of CBG CBG feedback resources and/or other part of CBG feedback resources.
  • the terminal further includes a processing unit 420, configured to:
  • the third side link carries side control information SCI corresponding to the first side link.
  • the processing unit 420 is further configured to:
  • each CBG in the at least part of the CBG corresponds Feedback resources.
  • the correspondence relationship is preset, configured on the network side, or configured on other terminals than the terminal.
  • the feedback information is carried through the second sequence
  • the second sequence indicates NACK information without indicating ACK information, or the second sequence indicates ACK information without indicating NACK information.
  • the terminal further includes a processing unit 420, configured to:
  • the reception status of the CBG in the first TB of other terminals in the terminal group to which the first terminal belongs is determined.
  • the communication unit 410 is further used to:
  • the second indication information is carried in a physical side link control channel PSCCH, through the information field in the SCI in the PSCCH and/or the scrambling sequence of the SCI Carrying the second indication information; or,
  • the second indication information is carried in the physical side link shared channel PSSCH, and the second indication information is carried by the data in the PSSCH.
  • the processing unit 420 is further configured to:
  • the third indication information is carried in the PSCCH, and the third indication information is carried in the information field of the SCI in the PSCCH.
  • the terminal 400 may implement the corresponding operation implemented by the second terminal in the foregoing method embodiments, and for the sake of brevity, no further description is provided here.
  • FIG. 13 is a schematic structural diagram of a terminal 500 provided by an embodiment of the present application.
  • the terminal 500 shown in FIG. 13 includes a processor 510, and the processor 510 can call and run a computer program from the memory to implement the method in the embodiment of the present application.
  • the terminal 500 may further include a memory 520.
  • the processor 510 can call and run a computer program from the memory 520 to implement the method in the embodiments of the present application.
  • the memory 520 may be a separate device independent of the processor 510, or may be integrated in the processor 510.
  • the terminal 500 may further include a transceiver 530, and the processor 510 may control the transceiver 530 to communicate with other devices, specifically, may send information or data to other devices, or receive other devices The information or data sent.
  • the transceiver 530 may include a transmitter and a receiver.
  • the transceiver 530 may further include antennas, and the number of antennas may be one or more.
  • the terminal 500 may specifically be the first terminal or the second terminal of the embodiment of the present application, and the terminal 500 may implement the corresponding process implemented by the first terminal or the second terminal in each method of the embodiment of the present application, For brevity, I will not repeat them here.
  • FIG. 14 is a schematic structural diagram of a chip according to an embodiment of the present application.
  • the chip 600 shown in FIG. 14 includes a processor 610, and the processor 610 can call and run a computer program from the memory to implement the method in the embodiments of the present application.
  • the chip 600 may further include a memory 620.
  • the processor 610 can call and run a computer program from the memory 620 to implement the method in the embodiments of the present application.
  • the memory 620 may be a separate device independent of the processor 610, or may be integrated in the processor 610.
  • the chip 600 may further include an input interface 630.
  • the processor 610 can control the input interface 630 to communicate with other devices or chips. Specifically, it can obtain information or data sent by other devices or chips.
  • the chip 600 may further include an output interface 640.
  • the processor 610 can control the output interface 640 to communicate with other devices or chips. Specifically, it can output information or data to other devices or chips.
  • the chip may be applied to the first terminal or the second terminal in the embodiment of the present application, and the chip may implement the corresponding process implemented by the first terminal or the second terminal in each method of the embodiment of the present application. It is concise and will not be repeated here.
  • chips mentioned in the embodiments of the present application may also be referred to as system-level chips, system chips, chip systems, or system-on-chip chips.
  • the communication system 800 includes a first terminal 810 and a second terminal 820.
  • the terminal device 810 can be used to implement the corresponding function implemented by the terminal device in the above method
  • the network device 820 can be used to implement the corresponding function implemented by the network device in the above method.
  • the processor in the embodiment of the present application may be an integrated circuit chip, which has signal processing capabilities.
  • the steps of the foregoing method embodiments may be completed by instructions in the form of hardware integrated logic circuits or software in the processor.
  • the aforementioned processor may be a general-purpose processor, a digital signal processor (Digital Signal Processor, DSP), an application specific integrated circuit (Application Specific Integrated Circuit, ASIC), an existing programmable gate array (Field Programmable Gate Array, FPGA), or other available Programming logic devices, discrete gates or transistor logic devices, discrete hardware components.
  • DSP Digital Signal Processor
  • ASIC Application Specific Integrated Circuit
  • FPGA Field Programmable Gate Array
  • the methods, steps, and logical block diagrams disclosed in the embodiments of the present application may be implemented or executed.
  • the general-purpose processor may be a microprocessor or the processor may be any conventional processor or the like.
  • the steps of the method disclosed in conjunction with the embodiments of the present application may be directly embodied and executed by a hardware decoding processor, or may be executed and completed by a combination of hardware and software modules in the decoding processor.
  • the software module may be located in a mature storage medium in the art, such as a random access memory, a flash memory, a read-only memory, a programmable read-only memory, an electrically erasable programmable memory, and a register.
  • the storage medium is located in the memory, and the processor reads the information in the memory and completes the steps of the above method in combination with its hardware.
  • the memory in the embodiments of the present application may be volatile memory or non-volatile memory, or may include both volatile and non-volatile memory.
  • the non-volatile memory can be read-only memory (Read-Only Memory, ROM), programmable read-only memory (Programmable ROM, PROM), erasable programmable read-only memory (Erasable PROM, EPROM), electronically Erase Programmable Read Only Memory (Electrically EPROM, EEPROM) or flash memory.
  • the volatile memory may be a random access memory (Random Access Memory, RAM), which is used as an external cache.
  • RAM static random access memory
  • DRAM dynamic random access memory
  • DRAM synchronous dynamic random access memory
  • SDRAM double data rate synchronous dynamic random access memory
  • Double Data Rate SDRAM DDR SDRAM
  • enhanced SDRAM ESDRAM
  • Synchlink DRAM SLDRAM
  • Direct Rambus RAM Direct Rambus RAM
  • the memory in the embodiments of the present application may also be static random access memory (static RAM, SRAM), dynamic random access memory (dynamic RAM, DRAM), Synchronous dynamic random access memory (synchronous DRAM, SDRAM), double data rate synchronous dynamic random access memory (double data) SDRAM (DDR SDRAM), enhanced synchronous dynamic random access memory (enhanced SDRAM, ESDRAM), synchronous connection Dynamic random access memory (synch link DRAM, SLDRAM) and direct memory bus random access memory (Direct Rambus RAM, DR RAM) and so on. That is to say, the memories in the embodiments of the present application are intended to include but are not limited to these and any other suitable types of memories.
  • Embodiments of the present application also provide a computer-readable storage medium for storing computer programs.
  • the computer-readable storage medium may be applied to the network device in the embodiments of the present application, and the computer program causes the computer to execute the corresponding process implemented by the network device in each method of the embodiments of the present application.
  • the computer program causes the computer to execute the corresponding process implemented by the network device in each method of the embodiments of the present application.
  • the computer-readable storage medium may be applied to the mobile terminal/terminal device in the embodiments of the present application, and the computer program causes the computer to execute the corresponding process implemented by the mobile terminal/terminal device in each method of the embodiments of the present application For the sake of brevity, I will not repeat them here.
  • An embodiment of the present application also provides a computer program product, including computer program instructions.
  • the computer program product may be applied to the network device in the embodiments of the present application, and the computer program instructions cause the computer to execute the corresponding process implemented by the network device in each method of the embodiment of the present application. Repeat again.
  • the computer program product can be applied to the mobile terminal/terminal device in the embodiments of the present application, and the computer program instructions cause the computer to execute the corresponding process implemented by the mobile terminal/terminal device in each method of the embodiments of the present application, For brevity, I will not repeat them here.
  • An embodiment of the present application also provides a computer program.
  • the computer program can be applied to the network device in the embodiment of the present application.
  • the computer program runs on the computer, the computer is allowed to execute the corresponding process implemented by the network device in each method of the embodiment of the present application. And will not be repeated here.
  • the computer program can be applied to the mobile terminal/terminal device in the embodiments of the present application, and when the computer program runs on the computer, the computer is implemented by the mobile terminal/terminal device in performing various methods of the embodiments of the present application For the sake of brevity, I will not repeat them here.
  • the disclosed system, device, and method may be implemented in other ways.
  • the device embodiments described above are only schematic.
  • the division of the unit is only a logical function division, and there may be other divisions in actual implementation, for example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored, or not implemented.
  • the displayed or discussed mutual coupling or direct coupling or communication connection may be indirect coupling or communication connection through some interfaces, devices or units, and may be in electrical, mechanical, or other forms.
  • the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place or may be distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.
  • each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units may be integrated into one unit.
  • the function is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium.
  • the technical solution of the present application essentially or part of the contribution to the existing technology or part of the technical solution can be embodied in the form of a software product
  • the computer software product is stored in a storage medium, including Several instructions are used to enable a computer device (which may be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the methods described in the embodiments of the present application.
  • the aforementioned storage media include: U disk, mobile hard disk, Read-Only Memory (ROM), random access memory (Random Access Memory, RAM), magnetic disk or optical disk and other media that can store program code .

Abstract

L'invention concerne un procédé de communication sans fil et un terminal, permettant d'éviter le gaspillage de ressources. Le procédé comprend les étapes suivantes : un premier terminal reçoit un premier bloc de transport (TB) envoyé par un second terminal par l'intermédiaire d'une première liaison latérale ; et le premier terminal utilise une seconde liaison latérale pour envoyer, au second terminal, des informations de retour pour le premier TB, les informations de retour étant des informations de retour basées sur un groupe de blocs de code (CBG).
PCT/CN2019/071492 2019-01-11 2019-01-11 Procédé de communication sans fil et terminal WO2020143062A1 (fr)

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CN201980054523.5A CN112586031A (zh) 2019-01-11 2019-01-11 无线通信方法和终端

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PCT/CN2019/071492 WO2020143062A1 (fr) 2019-01-11 2019-01-11 Procédé de communication sans fil et terminal

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