WO2022183405A1 - Procédé et appareil d'envoi d'informations, terminal et support de stockage - Google Patents

Procédé et appareil d'envoi d'informations, terminal et support de stockage Download PDF

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Publication number
WO2022183405A1
WO2022183405A1 PCT/CN2021/078880 CN2021078880W WO2022183405A1 WO 2022183405 A1 WO2022183405 A1 WO 2022183405A1 CN 2021078880 W CN2021078880 W CN 2021078880W WO 2022183405 A1 WO2022183405 A1 WO 2022183405A1
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WIPO (PCT)
Prior art keywords
resource
time
resource set
information
resources
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PCT/CN2021/078880
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English (en)
Chinese (zh)
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WO2022183405A9 (fr
Inventor
丁伊
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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 CN202180075201.6A priority Critical patent/CN116368910A/zh
Priority to PCT/CN2021/078880 priority patent/WO2022183405A1/fr
Publication of WO2022183405A1 publication Critical patent/WO2022183405A1/fr
Publication of WO2022183405A9 publication Critical patent/WO2022183405A9/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/16—Central resource management; Negotiation of resources or communication parameters, e.g. negotiating bandwidth or QoS [Quality of Service]
    • H04W28/26—Resource reservation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/30—Services specially adapted for particular environments, situations or purposes
    • H04W4/40—Services specially adapted for particular environments, situations or purposes for vehicles, e.g. vehicle-to-pedestrians [V2P]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/02—Selection of wireless resources by user or terminal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/12—Wireless traffic scheduling

Definitions

  • the present application relates to the field of mobile communications, and in particular, to an information sending method, device, terminal and storage medium.
  • the SideLink (SL) transmission method is introduced.
  • the terminal In a transmission mode of SL, the terminal needs to perform resource selection in the resource pool through a resource exclusion process and a resource selection process.
  • the resource exclusion process of the terminals can be performed through cooperation between the terminals.
  • auxiliary information from the first terminal may also be considered, thereby further avoiding the possibility of resource collision between the selected resources and other terminals, and improving communication reliability.
  • the embodiments of the present application provide an information sending method, device, terminal, and storage medium, which can improve the accuracy of auxiliary information.
  • the technical solution is as follows.
  • a method for sending information is provided, which is applied in a first terminal, and the method includes:
  • the first time-frequency resource is a resource used to send the auxiliary information
  • the auxiliary information is information used to assist the second terminal.
  • an apparatus for sending information comprising:
  • an evaluation module configured to re-evaluate the auxiliary information or the first time-frequency resource at least once before the first time-frequency resource
  • the first time-frequency resource is a resource used to send the auxiliary information
  • the auxiliary information is information used to assist the second terminal.
  • a terminal comprising: a processor; a transceiver connected to the processor; a memory for storing executable instructions of the processor; wherein the processing The processor is configured to load and execute the executable instructions to implement the information sending method as described in the above aspects.
  • a computer-readable storage medium is provided, and executable instructions are stored in the computer-readable storage medium, and the executable instructions are loaded and executed by a processor to implement the above-mentioned aspects.
  • Method of sending information is provided.
  • a computer program product or computer program comprising computer instructions stored in a computer-readable storage medium, the processor of the computer device being readable from the computer
  • the storage medium reads the computer instructions, and the processor executes the computer instructions, so that the computer device executes the information sending method described in the above aspects.
  • a chip is provided, the chip includes a programmable logic circuit or a program, and the chip is used to implement the information sending method described in the above aspects.
  • the auxiliary information provided by the first terminal to the second terminal can be made more accurate, and the second terminal can use the more accurate auxiliary information to Resource selection can better avoid resource collision and improve communication reliability.
  • FIG. 1 is a schematic diagram of a transmission mode of a sidelink in a related art of the present application
  • FIG. 2 is a block diagram of a physical layer structure of NR-V2X in a related art of the present application
  • FIG. 3 is a block diagram of resource reservation within a TB or between TBs in a related art of the present application
  • FIG. 4 is a schematic diagram of a resource selection method provided by an exemplary embodiment of the present application.
  • FIG. 5 is a schematic diagram of a resource selection method provided by an exemplary embodiment of the present application.
  • FIG. 6 is a schematic diagram of a resource re-evaluation process provided by an exemplary embodiment of the present application.
  • FIG. 7 is a schematic diagram of a resource preemption judgment process provided by an exemplary embodiment of the present application.
  • FIG. 8 is a block diagram of a communication system supporting sideline transmission provided by an exemplary embodiment of the present application.
  • FIG. 9 is a flowchart of a method for sending information provided by an exemplary embodiment of the present application.
  • FIG. 10 is a flowchart of a method for sending information provided by an exemplary embodiment of the present application.
  • FIG. 11 is a time-frequency resource diagram of an information sending method provided by an exemplary embodiment of the present application during an exemplary implementation
  • FIG. 12 is a time-frequency resource diagram of an information sending method provided by an exemplary embodiment of the present application during exemplary implementation
  • FIG. 13 is a time-frequency resource diagram of an information sending method provided by an exemplary embodiment of the present application in an exemplary implementation
  • FIG. 15 is a time-frequency resource diagram of an information sending method provided by an exemplary embodiment of the present application in an exemplary implementation
  • FIG. 16 is a time-frequency resource diagram of an information sending method provided by an exemplary embodiment of the present application in an exemplary implementation
  • FIG. 17 is a time-frequency resource diagram of an information sending method provided by an exemplary embodiment of the present application during an exemplary implementation
  • FIG. 18 is a structural block diagram of an information sending apparatus provided by an exemplary embodiment of the present application.
  • FIG. 19 is a schematic structural diagram of a terminal provided by an exemplary embodiment of the present application.
  • V2X Vehicle to everything
  • V2X communication includes Vehicle to Vehicle (V2V) communication, Vehicle to Infrastructure (V2I) communication and Vehicle to People (V2P) communication.
  • V2X applications will improve driving safety, reduce congestion and vehicle energy consumption, improve traffic efficiency, and more.
  • Side Link (SL) transmission It is a device-to-device communication method with high spectral efficiency and low transmission delay.
  • Two transmission modes of the sidelink are defined in 3GPP: Mode A and Mode B.
  • Mode A the resources used by the terminal during transmission are allocated by the base station through the downlink, and the terminal transmits data on the sidelink according to the resources allocated by the base station;
  • the base station may allocate resources for a single transmission to the terminal, or may allocate resources for semi-static transmission to the terminal.
  • the terminal selects one or more resources from the resource pool for data transmission. Specifically, the terminal may select transmission resources from the resource pool by means of listening, or select transmission resources from the resource pool by means of random selection.
  • V2V uses side link for communication.
  • Figure 1 only takes vehicle-to-vehicle communication as an example, and the SL technology can be applied to scenarios where various terminals communicate directly.
  • the terminal in this application refers to any terminal that communicates using the SL technology.
  • NR-V2X New Radio (NR)-V2X
  • higher requirements are put forward for data interaction between vehicles, such as higher throughput, lower latency, higher reliability, Greater coverage, more flexible resource allocation, etc.
  • the physical layer structure of NR-V2X is shown in Figure 2, and the Physical Side-Link Control Channel (PSCCH) 201 used for transmitting control information is included in the Physical Side-Link Shared Channel (Physical Side-Link Shared Channel) used for transmitting data.
  • PSSCH Physical Side-Link Shared Channel
  • PSSCH PSSCH
  • the terminal selects resources in the resource pool to send data by itself. Resource reservation is the premise of resource selection. Resource reservation means that the terminal sends the first sideline control information in the PSCCH to reserve resources to be used next.
  • NR-V2X resource reservation within a single transport block (TransportBlock, TB) is supported, and resource reservation between two TBs is also supported.
  • TransportBlock, TB transport block
  • the PSSCH scheduled by the first sideline control information transmitted by the terminal in the PSCCH in FIG. 2 refers to the PSSCH sent by the terminal simultaneously with the PSCCH in FIG. 2 .
  • the terminal sends the first sideline control information, and uses the "Time resource assignment" and "Frequency resource assignment" fields in the first sideline control information to indicate N time-frequency resources of the current TB (including the resources currently used for sending).
  • N ⁇ N max in NR V2X, N max is equal to 2 or 3. Meanwhile, the above N indicated time-frequency resources should be distributed in W time slots. In NR V2X, W is equal to 32.
  • the terminal uses the "Resource reservation period" field to perform resource reservation between TBs when sending the first sideline control information.
  • the terminal uses the "Time resource assignment” and “Frequency resource assignment” fields to indicate the time-frequency resource positions of the initial transmission and retransmission 1 of TB 1, Denoted as ⁇ (t 1 , f 1 ), (t 2 , f 2 ) ⁇ .
  • t 1 and t 2 represent the time domain resource positions of the initial transmission and retransmission 1 of the TB 1
  • f 1 and f 2 represent the corresponding frequency domain positions.
  • the SCI also indicates that time-frequency resources are reserved ⁇ (t 1 +100, f 1 ), (t 2 +100, f 2 ) ⁇ , these two resources are used for the initial transmission and retransmission 1 of TB 2.
  • the possible values of the "Resource reservation period” field are 0, 1-99, 100, 200, 300, 400, 500, 600, 700, 800, 900, 1000 milliseconds, which is more flexible than LTE V2X .
  • the terminal determines the possible values according to the resource pool used.
  • the value e in the resource pool configuration is the resource reservation period set M, exemplarily, e is less than or equal to 16.
  • the resource reservation period is the value indicated by the "Resourcereservationperiod" field.
  • the above-mentioned reservation between TBs can be activated or deactivated in units of resource pools.
  • the "Resource reservation period" field is not included in the first sideline control information.
  • the value of the "Resource reservation period” field used by the terminal that is, the resource reservation period, will not change.
  • the "Resource reservation period” field reserves the resources of the next period for the transmission of another TB, so as to achieve periodic semi-persistent transmission.
  • the terminal can obtain the first sideline control information sent by the other terminal by listening to the PSCCH sent by the other terminal, so as to know the resources reserved by the other terminal.
  • the terminal selects resources, it will exclude resources reserved by other terminals, so as to avoid resource collision.
  • the resource selection window (selection window for short) starts from time n+T1 and ends at time n+T2.
  • T1 ⁇ Tproc, 1.
  • Tproc,1 corresponds to 3, 5, 9, and 17 time slots;
  • Terminal 1 T2min is determined from the set of values according to the priority of the data to be sent.
  • the terminal determines T2min from the set ⁇ 1, 5, 10, 20 ⁇ according to the priority of the data to be sent by the terminal.
  • T2min is greater than or equal to the remaining delay budget of the service
  • T2 is equal to the remaining delay budget of the service.
  • the remaining delay budget is the difference between the time corresponding to the data delay requirement and the current time. For example, for a packet arriving at time slot n, the delay requirement is 50 milliseconds. Suppose a time slot is 1 millisecond. If the current time is time slot n, the remaining delay budget is 50 milliseconds. If the current time is time slot n+20 , the remaining delay budget is 30 ms.
  • the terminal performs resource monitoring from n-T0 to n-Tproc,0, and the value of T0 is 100 or 1100 milliseconds.
  • Tproc,0 is 1, 1, 2, and 4 time slots.
  • the terminal will listen to the first sideline control information sent by other terminals in each time slot (except its own transmission time slot). After time slot n triggers resource selection or reselection, the terminal uses n-T0 to n- Tproc,0 The result of resource snooping.
  • Step 1 resource exclusion process
  • the terminal 1 takes all the available resources belonging to the resource pool used by the terminal 1 in the resource selection window 44 as the resource set A, and any resource in the resource set A is denoted as R ( x, y), x and y indicate the frequency domain location and time domain location of the resource, respectively.
  • the initial number of all available resources belonging to the resource pool used by the terminal 1 in the resource selection window 44 is recorded as M total .
  • Ptxlg is the number after Ptx is converted into logical time slots
  • Ptx is the resource reservation period determined by terminal 1, which is a value in the resource reservation period set M in the resource pool configuration used by terminal 1.
  • Prxlg is the number of Prx converted into logical time slots.
  • the terminal may not perform the above step 1-1.
  • Step 1-2 As shown in FIG. 5 , if the terminal 1 senses the first sideline control information (v is The frequency domain location of the resource), measure the SL-RSRP of the PSCCH or the SL-RSRP of the PSSCH scheduled by the PSCCH (that is, the SL-RSRP of the PSSCH sent at the same time with the PSCCH), if the measured SL-RSRP is greater than the SL-RSRP threshold , and the resource pool used by the terminal 1 activates resource reservation between TBs, then the terminal 1 assumes that the first sideline control information with the same content has been received on the timeslot m+q*Prxlg.
  • v is The frequency domain location of the resource
  • Tscal is equal to the value of T2 converted to milliseconds.
  • Prxlg is the number after Prx is converted into logical time slots, and Prx is the resource reservation period indicated by "Resource reservation period" in the first sideline control information transmitted in the PSCCH heard by the terminal 1.
  • Terminal 1 will judge the first sideline control information received in time slot m and the resources indicated by the "Time resource assignment" and "Frequency resource assignment" fields of the Q pieces of first sideline control information received and the resource R ( Whether x, y+j*Ptxlg) overlap, if so, exclude the corresponding resource R(x, y) from the resource set A.
  • Ptxlg is the number after Ptx is converted into logical time slots
  • Ptx is the resource reservation period determined by terminal 1.
  • the resource R(x, y+j*Ptxlg) is the four resources 46 marked with slanted hatching in FIG. 5 .
  • terminal 1 senses the first sideline control information in PSCCH on time slot m resource E(v, m), and decodes Prx>Tscal, and calculates that Q is equal to 1, terminal 1 will assume that in time slot m+ The first sideline control message of the same content was received on Prxlg.
  • Terminal 1 will judge the first sideline control information received at time slot m and the resources indicated by the "Time resource assignment" and "Frequency resource assignment" fields of the first sideline control information received at time slot m+Prxlg 1 (resource 1 and resource E (v, m) refer to the same resource), 2, 3, 4, 5, 6 and resource R (x, y+j*Ptxlg) whether they overlap, if they overlap, from the resource set Resource R(x, y) is excluded from A. If the SL-RSRP measured by the terminal 1 is greater than the SL-RSRP threshold, and the resource pool used by the terminal 1 deactivates the resource reservation between TBs, the terminal 1 only determines the "Time" of the first sideline control information received in the time slot m.
  • the resource indicated by the "resource assignment” and “Frequency resource assignment” fields overlaps the resource R(x,y+j*Ptxlg), if it overlaps, the resource R(x,y) is excluded from the resource set A.
  • the resource pool used by the UE deactivates the reservation between TBs, the resource R(x, y+j*Ptxlg) is equal to R(x, y).
  • the SL-RSRP threshold is raised by 3dB, and step 1 (including at least one of step 1-1 and step 1-2) is performed again.
  • the physical layer reports the resource set A after resource exclusion to the upper layer as a candidate resource set.
  • Step 2 Resource selection process
  • the terminal 1 randomly selects several resources from the candidate resource set A as resources used by the terminal 1 to send data.
  • the above RSRP threshold is determined by the priority P1 carried in the PSCCH heard by the terminal 1 and the priority P2 of the data to be sent in the terminal 1.
  • the terminal 1 obtains an SL-RSRP threshold table through network configuration or pre-configuration, where the SL-RSRP threshold table includes SL-RSRP thresholds corresponding to all priority combinations.
  • the SL-RSRP thresholds corresponding to different priority combinations are represented by ⁇ ij , where i in ⁇ ij is The value of the priority level P1, and j is the value of the priority level P2.
  • terminal 1 listens to the PSCCH sent by terminal 2, it obtains the priority P1 carried in the first sideline control information transmitted in the PSCCH and the priority P2 of the data packet to be sent, and terminal 1 determines by looking up Table 1.
  • SL-RSRP threshold When terminal 1 listens to the PSCCH sent by terminal 2, it obtains the priority P1 carried in the first sideline control information transmitted in the PSCCH and the priority P2 of the data packet to be sent, and terminal 1 determines by looking up Table 1. SL-RSRP threshold.
  • the terminal 1 uses the measured PSCCH-RSRP or the PSSCH-RSRP scheduled by the PSCCH to compare with the SL-RSRP threshold depends on the resource pool configuration of the resource pool used by the terminal 1.
  • the configuration of the resource pool can be network configuration or pre-configured.
  • Prxlg/Ptxlg is the number of Prx/Ptx converted into logical time slots: Assuming that one time slot is equal to 1 millisecond and Prx is 5 milliseconds, among these 5 time slots, 2 time slots may be in TDD mode The downlink time slot or the time slot for sending the synchronization signal, these time slots are not included in the resource pool of Sidelink, so it is necessary to convert the 5 milliseconds represented by Prx into 3 time slots of logical time slots, namely Prxlg.
  • the configuration of the resource pool used by the terminal 1 includes the corresponding relationship between the priority and the above possible values, and the terminal 1 determines the value of X according to the priority of the data to be sent and the corresponding relationship.
  • the resource pool configuration can be either configured by the network or pre-configured.
  • the first selected resource is resources for reassessment.
  • resources x, y, z, u, and v are selected resources selected by terminal 1 in time unit n, and resource y is located in time slot m.
  • resource y is located in time slot m.
  • the terminal 1 performs the resource exclusion process of the above step 1 at least once in the time slot m-T3, that is, at least in the time slot m-T3, determines the resource selection window and the resource listening window according to the above, and executes the above step 1 to the resource selection window.
  • Resource exclusion is performed to obtain a candidate resource set.
  • the terminal 1 performs the above step 2 to reselect the time-frequency resources in the resource z and u that are not in the candidate resource set, and can also reselect any selected but failed to send the first side line
  • the resources indicated by the control information such as any number of resources z, u and v.
  • the above T3 is equal to T proc,1 .
  • the dashed arrows indicate that the first sideline control information indication is about to be sent, and the solid line arrows indicate that the first sideline control information indication has been sent.
  • NR-V2X also supports resource preemption (Pre-emption) mechanism.
  • Pre-emption resource preemption
  • the conclusions about the resource preemption mechanism are all described from the perspective of the preempted terminal.
  • terminal 1 After completing the resource selection, terminal 1 continues to listen to the first sideline control information. If the selected resource indicated by sending the first sideline control information satisfies the following three conditions, it means that the selected resource is preempted by other terminals , Terminal 1 triggers resource reselection for the selected resource:
  • the SL-RSRP of the PSCCH corresponding to the first sideline control information detected by the terminal 1 or the SL-RSRP of the PSSCH scheduled by the PSCCH is greater than the SL RSRP threshold.
  • the priority carried in the detected first sideline control information is higher than the priority of the data to be sent by the terminal 1 .
  • the resources w, x, y, z, and v are the time-frequency resources selected by the terminal 1 in the time unit n, and the resource x is located in the time slot m.
  • the terminal 1 performs the above step 1 at least once in the time slot m-T3, that is, at least in the time slot m-T3, determines the resource selection window and the listening window according to the above, and executes the above step 1 to exclude resources in the resource selection window, Determine the candidate resource set.
  • the terminal 1 If the resource x or y is not in the candidate resource set, it is further judged whether the resource x or y satisfies the above three conditions, and if so, the terminal 1 performs step 2 to reselect the time-frequency resources in the resources x and y that satisfy the above three conditions. In addition, after the resource reselection is triggered, the terminal 1 can reselect any resource that has been selected but not indicated by sending the first sideline control information, such as any number of resources z and v.
  • the above T3 is equal to T proc,1 .
  • the above-mentioned SL-RSRP is the linear average value of the received power on all resource elements (REs) carrying reference signals (DMRS or CSI-RS) in the PSCCH or PSSCH.
  • the SL-RSRP is the sum of the SL-RSRPs measured by the respective antenna ports.
  • the present application introduces a cooperation mechanism between user equipments (User Equipment, UE) to solve the above problems.
  • User Equipment User Equipment
  • FIG. 8 shows a block diagram of a communication system supporting sideline transmission provided by an exemplary embodiment of the present application.
  • the communication system may be a schematic diagram of a non-roaming 5G system architecture (Non-roaming 5G system architecture), and the system architecture can be applied to a Vehicle to Everything (V2X) service using D2D technology.
  • Non-roaming 5G system architecture Non-roaming 5G system architecture
  • V2X Vehicle to Everything
  • the system architecture includes a data network (Data Network, DN), and a V2X application server (Application Server) required by the V2X service is set in the data network.
  • the system architecture also includes a 5G core network.
  • the network functions of the 5G core network include: Unified Data Management (UDM), Policy Control Function (PCF), Network Exposure Function (NEF), Application Function (AF), Unified Data Repository (UDR), Access and Mobility Management Function (AMF), Session Management Function (SMF), and User Interface Function (User Plane Function, UPF).
  • the system architecture further includes: a radio access network (New Generation-Radio Access Network, NG-RAN) and 4 terminals (ie, terminal 1 to terminal 4) shown in an exemplary manner.
  • each terminal is provided with a V2X application (Application) or an application supporting SL transmission.
  • One or more access network devices such as base stations (gNBs), are set in the radio access network.
  • the data network and the user plane function in the 5G core network are connected through the N6 reference point, and the V2X application server and the V2X application in the terminal are connected through the V1 reference point; the wireless access network and the 5G core network are connected through the reference point.
  • the AMF function and UPF function of the wireless access network are connected to the terminal 1 and terminal 5 respectively through the Uu reference point; multiple terminals are connected through the PC5 reference point for lateral transmission, and multiple V2X applications are connected through the V5 reference point.
  • the above reference points may also be referred to as "interfaces".
  • the embodiment of the present application proposes an SL communication method in which terminals cooperate to select resources.
  • the first terminal sends auxiliary information to the second terminal in two cases, where the auxiliary information is used to assist the resource selection process of the second terminal.
  • the second terminal sends trigger information to the first terminal, where the trigger information is used to trigger the first terminal to send auxiliary information to the second terminal.
  • the first terminal judges by itself that the sending condition is satisfied, it actively sends the auxiliary information to the second terminal.
  • the second terminal uses the auxiliary information to select resources.
  • the sending condition may be that it is detected that the resource sent by the second terminal collides with the first terminal, or the current moment matches the periodic sending moment.
  • the first terminal receives the trigger information from the second terminal or the first terminal meets the sending conditions and decides to send the auxiliary information to the second terminal, and the first terminal actually sends the auxiliary information.
  • These two time points There is a delay in between. There are many possibilities to cause this delay.
  • the first terminal After the first terminal receives the trigger information from the second terminal, it also needs to determine an appropriate sending resource (referred to as the first time-frequency resource) for sending auxiliary information. There is a delay between the resource and the time point when the first terminal receives the trigger information.
  • the second terminal is configured with DRX (Discontinuous Reception), and the first terminal needs to wait until the second terminal is in a receiving state (eg, an Onduration period in the DRX cycle) before sending the auxiliary information, thereby causing a delay.
  • DRX Continuous Reception
  • the above delay may cause the auxiliary information provided by the first terminal to be inaccurate.
  • the auxiliary information is determined, but the auxiliary information is sent after a period of delay.
  • the auxiliary information has not been determined based on the latest interception result.
  • the present application provides the following examples.
  • FIG. 10 shows a flowchart of an information sending method provided by an exemplary embodiment of the present application. This embodiment is illustrated by taking the method applied to the first terminal (ie, terminal 1 ) shown in FIG. 8 as an example.
  • the method includes:
  • Step 120 Re-evaluate the auxiliary information or the first time-frequency resource at least once before the first time-frequency resource;
  • the first time-frequency resource is a resource used for sending auxiliary information
  • the auxiliary information is information used to assist the second terminal.
  • Before the first time-frequency resource can be understood as: before the time unit where the first time-frequency resource is located.
  • re-evaluation may also be referred to as at least one of re-evaluation, secondary evaluation, and evaluation.
  • the term of "re-evaluation" is not limited in the embodiments of the present application.
  • auxiliary information includes but is not limited to at least one of the following four kinds of information:
  • the resource set is used to indicate resources suitable (preferred) for the second terminal or resources not suitable (not preferred) for the second terminal.
  • the resources suitable for the second terminal are resources recommended for use by the second terminal, or resources recommended for preferential use by the second terminal.
  • the resources that are not suitable for the second terminal are resources that are not recommended for use by the second terminal, or resources that are not recommended to be preferentially used by the second terminal.
  • the 1-bit indication information is used to indicate that the resources used or selected by the second terminal conflict with other terminals, or used to instruct the second terminal to trigger resource reselection.
  • the other terminals are terminals other than the second terminal, and the other terminals may include the first terminal or may not include the first terminal.
  • the method provided in this embodiment can make the auxiliary information provided by the terminal to other terminals more accurate by re-evaluating the auxiliary information or the first time-frequency resource at least once, and other terminals can use the more accurate auxiliary information to Resource selection can better avoid resource collision and improve communication reliability.
  • FIG. 11 shows a flowchart of an information sending method provided by an exemplary embodiment of the present application. This embodiment is illustrated by taking the method applied to the first terminal shown in FIG. 8 as an example. The method includes:
  • Step 220 Determine the first time-frequency resource
  • Step 240 determine auxiliary information
  • Step 260 Re-evaluate the auxiliary information at least once before the first time-frequency resource.
  • the first terminal After determining the auxiliary information and before the first time-frequency resource, the first terminal re-evaluates the auxiliary information at least once.
  • the re-evaluation of the auxiliary information refers to: updating the auxiliary information according to the latest interception result.
  • the re-evaluation of the auxiliary information refers to: evaluating whether the auxiliary information has changed according to the latest interception result, and if there is a change, updating the auxiliary information.
  • Before the first time-frequency resource can be understood as: before the time unit where the first time-frequency resource is located.
  • re-evaluation may also be referred to as at least one of re-evaluation, secondary evaluation, and evaluation.
  • the term of "re-evaluation" is not limited in the embodiments of the present application.
  • the manner of determining the first time-frequency resource includes at least two manners:
  • Manner 1 the first terminal determines the resource listening window, and determines the first resource selection window; the first terminal determines the resource listening window according to the listening result (step 1-2) and/or the non-listening time slot (step 1) -1), exclude the resources in the first resource selection window to obtain the first remaining resource set, and the first remaining resource set includes the remaining resources that are not excluded; when the first terminal selects the first resource in the first remaining resource set frequency resources.
  • the first terminal determines a time unit n; and determines a start position and an end position of the resource listening window based on the time unit n.
  • the first terminal determines a time unit n; and determines a first start position and a first end position of the first resource selection window based on the time unit n.
  • the offset of the first end position relative to the time unit n is less than or equal to W, which is indicated in the trigger information or configured or preconfigured by the network side or a preset value specified for the communication protocol; or, the first end The position is less than or equal to the absolute slot e, which is indicated by the trigger information.
  • the time unit n is the time slot in which the trigger information is received by the first terminal, or the time unit n is the time slot in which the first terminal decodes the trigger information, or the time unit n is the time slot determined by the first terminal to satisfy the sending condition.
  • Time slot, trigger information is information that triggers cooperation between terminals
  • transmission condition is the condition that triggers the transmission of auxiliary information.
  • the specific position of the time unit n is not limited in this embodiment, and the foregoing three examples are only possible positions of the time unit n. where n is a positive integer.
  • the first terminal determines the resource listening window based on the time unit n, the start position of the resource listening window is n-T10, and the end position of the resource listening window is n-Ts.
  • the time unit n is the time slot in which the trigger information is received or decoded by the first terminal, or the time slot in which the first terminal determines that the sending condition is satisfied.
  • the above trigger information is used to trigger cooperation between terminals, and the above sending condition may be, for example, that the current time slot satisfies the condition for periodically sending auxiliary information.
  • T10 and TS refer to the definitions of T0 and Tproc,0 above.
  • the first terminal further determines the first resource selection window based on the time unit n, where the first start position of the first resource selection window is n+T11, and the first end position of the first resource selection window is n+T12.
  • the first terminal determines one or more first time-frequency resources for transmitting auxiliary information within the first resource selection window.
  • T11 refers to the aforementioned T1
  • T12 refers to the aforementioned T2.
  • T12 is less than or equal to W
  • W is indicated in the trigger information or configured or pre-configured by the network side or a preset value specified for the communication protocol.
  • the first terminal determines the absolute time slot e according to the indication of the trigger information, and the determination of T12 should satisfy that n+T12 is less than or equal to the time slot e.
  • the first terminal takes all available resources in the first resource selection window as the resource set A, performs step 1 above on the resource set A and randomly selects one or more first time-frequency resources therefrom.
  • the parameters required by the first terminal when performing step 1, such as the SL-RSRP threshold, the priority of the data to be sent, etc., can be indicated by the trigger information, or configured by the network side, or pre-configured, or pre-configured for the communication protocol. set value.
  • the priority of the data to be sent is set to the highest priority, or the priority of the data to be sent is higher than or equal to any priority of the priority threshold.
  • the priority threshold is configured or pre-configured by the network or is a specified preset value.
  • the first time-frequency resource occupies one time slot in the time domain, and occupies one subchannel in the frequency domain.
  • resources p and w in FIG. 12 are two first time-frequency resources determined by the first terminal.
  • the first terminal determines the first time-frequency resource based on the time unit and sub-channel position of the trigger information, where the trigger information is information that triggers cooperation between terminals.
  • the first terminal determines the time after the time unit t+k (including the time unit t+k).
  • the auxiliary information is sent in M consecutive time units including PSFCH resources.
  • k is configured or pre-configured by the network side or a preset value specified for the communication protocol, for example, k is 2.
  • the above-mentioned M first time-frequency resources are M PSFCH resources in the M time units (including one in each time unit).
  • the frequency domain positions of the M PSFCH resources in respective time units are determined by the position of the sub-channel where the trigger information is received by the first terminal or the starting position of the sub-channel.
  • the corresponding relationship between the sub-channel position and one or more PSFCH resources, or the corresponding relationship between the starting position of the sub-channel and one or more PSFCH resources is specified by the network side configuration or pre-configuration or the communication protocol.
  • the first terminal determines the corresponding frequency domain positions of the M PSFCH resources according to the sub-channel position or the sub-channel start position on which the trigger information is received.
  • the above-mentioned M is 1 or any positive integer
  • the above-mentioned time unit is a time slot, a symbol or a subframe.
  • the above-mentioned sub-channel positions may refer to the positions of a single sub-channel or the positions of multiple sub-channels.
  • each PSFCH resource occupies one or two symbols in the time domain, and occupies one physical resource block (Physical Resource Block, PRB) in the frequency domain.
  • PRB Physical Resource Block
  • step 240 For step 240:
  • auxiliary information includes but is not limited to at least one of the following four kinds of information:
  • the auxiliary information includes a resource set
  • the way of determining the resource set includes any one of the following four ways.
  • the first resource set is determined as the auxiliary information, and the first resource set is determined based on the listening process of the first terminal;
  • the first set of resources includes non-excluded resources or excluded resources. In the case where the first resource set includes excluded resources, the first resource set is used to indicate resources that are not suitable for the second terminal. In the case where the first resource set includes resources that are not excluded, the first resource set is used to indicate resources suitable for the second terminal.
  • the second resource set is determined as the auxiliary information, and the second resource set is determined based on the time unit where the information transmission of the first terminal is located;
  • the second resource set is used to indicate resources that are not suitable for the second terminal.
  • Mode 3 Determine the union of the first resource set and the second resource set as auxiliary information
  • the first resource set is used to indicate resources not suitable for the second terminal
  • a union of the first resource set and the second resource set is determined as the auxiliary information.
  • Manner 4 Determine the difference set between the first resource set and the second resource set as auxiliary information.
  • a difference set between the first resource set and the second resource set is determined as the auxiliary information.
  • the first terminal determines the resource listening window, and determines the second resource selection window; according to the listening result and/or the non-listening time slot in the resource listening window, the resources in the second resource selection window are selected. Exclude, and determine the first resource set.
  • the second starting position and the second ending position of the second resource selection window are determined according to the target time unit where the first time-frequency resource is located.
  • the target time unit is each of the multiple first time-frequency resources, or the first first time-frequency resource among the multiple first time-frequency resources frequency resource, or the last first time-frequency resource among multiple first time-frequency resources.
  • the second start position of the second resource selection window in the time domain is obtained by adding the target time unit to the start offset, and the second end position is obtained by adding the target time unit and the end offset.
  • the second start position is obtained by subtracting the advance offset from the target time unit and then adding the start offset
  • the second end position is obtained by subtracting the advance offset from the target time unit and adding the end offset.
  • the above-mentioned start offset, end offset, and advance offset are configured or pre-configured by the network side, or implemented by the terminal, or are preset values specified for the communication protocol, or are determined by trigger information.
  • the first terminal determines two first time-frequency resources p and w, and the resource w is located in the time slot m. Then the second resource selection window is from time slot m+T21 to time slot m+T22. Or m-T23+T21 to m-T23+T22.
  • the start offset T21 refers to the definition of the aforementioned introduction T1
  • the end offset T22 refers to the aforementioned definition of the introduction T2
  • the advance offset T23 refers to the aforementioned definition of the introduction T3.
  • the above-mentioned T21 or T22 is indicated by the trigger information.
  • T22 is less than or equal to the preset value W, where W is a preset value specified by the standard, and optionally, W is 32 time slots.
  • the first terminal determines the time slot f according to the indication of the trigger information, the above-mentioned determination of T21 should make the starting position of the second resource selection window greater than or equal to the time slot f, or the above-mentioned determination of T22 should make the second resource selection window The end position is less than or equal to slot f.
  • the determination of the above T21 should ensure that the starting position of the second resource selection window is greater than the time slot where the last first time-frequency resource W to be sent is located.
  • the first terminal uses all available resources in the second resource selection window as the first resource set A, and performs the above step 1 on the first resource set A, including step 1-1 and/or step 1-2.
  • the parameters required by the first terminal when performing step 1, such as the SL-RSRP threshold, the priority of the data to be sent, etc., can be indicated by the trigger information, or configured by the network, or pre-configured or a preset value specified by the standard.
  • the first resource set includes resources excluded or not excluded by the first terminal performing step 1.
  • the first resource set includes resources x, z, v and resource y in FIG. 12 .
  • the first terminal determines all the time-frequency resources in the time unit where the first terminal performs information transmission as the second resource set.
  • the second resource set includes all time-frequency resources in a time unit where the first terminal performs data transmission or auxiliary information transmission or trigger information transmission.
  • the second resource set includes all the time-frequency resources in the time unit where the first terminal performs data transmission or auxiliary information transmission or trigger information transmission in the future.
  • the second resource set includes, in the first In the second resource selection window, all time-frequency resources in the time unit where the first terminal performs data transmission, auxiliary information transmission, or trigger information transmission.
  • the manner of determining the 1-bit indication information includes any one of the following two manners.
  • Manner 1 Determine a resource set (see Introduction 1 above), the resource set is used to indicate resources suitable for the second terminal; when all the resources in the third resource set belong to the resource set, determine the 1-bit indication information as the first value ; When the resources in the third resource set have resources that do not belong to the resource set, determine that the 1-bit indication information is the second value; the third resource set is indicated by the trigger information. That is, the third resource set is the resource indicated by the second terminal, or the resource selected by the second terminal.
  • Manner 2 Determine a resource set (see introduction 1 above), the resource set is used to indicate resources that are not suitable for the second terminal; when none of the resources in the third resource set belong to the resource set, determine 1-bit indication information as the first value; when the resources in the third resource set have resources belonging to the resource set, determine that the 1-bit indication information is the second value; wherein, the third resource set is indicated by the trigger information.
  • the first value is 1, and the second value is 0.
  • the first value is 0 and the second value is 1.
  • auxiliary information includes the priority and/or the resource reservation period carried in the first sideline control information sensed by the first terminal.
  • the first sideline control information heard by the first terminal may refer to the first sideline control information that causes the resources in the resource set to be excluded in the first introduction by the first terminal.
  • the above resource set includes resources x, z, v, and y in FIG. 12 . Due to the indications of the first sideline control information 1, 2, 3, and 4 heard by the first terminal, the resources x, z, v, and y y is excluded, the auxiliary information includes the priority and/or the resource reservation period carried in the first sideline control information 1, 2, 3 and 4.
  • the first sideline control information sensed by the first terminal may refer to the first sideline control information sensed by the first terminal in one or more specific time units.
  • the above-mentioned specific one or more time units may be the time units that the transmitting end of the first terminal sends, or the time units that the first terminal receives data, or are configured or pre-configured by the network side or configured by the first terminal.
  • a terminal-implemented time unit may be the time units that the transmitting end of the first terminal sends, or the time units that the first terminal receives data, or are configured or pre-configured by the network side or configured by the first terminal.
  • step 260 For step 260:
  • the first terminal re-evaluates the auxiliary information at least in a first time unit determined after subtracting the first offset from the target time unit.
  • the target time unit is any one of the multiple first time-frequency resources, or the first first time-frequency resource among the multiple first time-frequency resources frequency resource, or the last first time-frequency resource among multiple first time-frequency resources.
  • the first offset is: an offset configured by the network side; or, a pre-configured offset; or, an offset implemented by the first terminal; or, an offset specified by a communication protocol ; or, the offset indicated by the trigger information, where the trigger information is information used to trigger cooperation between terminals.
  • the re-evaluation process of the auxiliary information includes:
  • the first terminal determines the resource listening window and determines the third resource selection window; The resources obtained are excluded to obtain the second remaining resource set; the intersection of the resource set before the update and the second remaining resource set is determined as the updated resource set; or, the resource set before the update and the second remaining resource set. The union is determined as the updated resource collection.
  • the start position and the end position of the resource listening window are determined according to the target time unit where the first time-frequency resource is located.
  • the start position and the end position of the resource listening window are determined according to the first time unit determined by subtracting the first offset from the target time unit.
  • the third starting position and the third ending position of the third resource selection window are determined according to the target time unit where the first time-frequency resource is located.
  • the target time unit is each of the multiple first time-frequency resources, or the first first time-frequency resource among the multiple first time-frequency resources frequency resource, or the last first time-frequency resource among multiple first time-frequency resources.
  • the third start position of the third resource selection window in the time domain is obtained by adding the target time unit to the start offset
  • the third end position is obtained by adding the target time unit and the end offset.
  • the third starting position is obtained by subtracting the first offset from the target time unit and then adding the starting offset
  • the third ending position is obtained by subtracting the first offset from the target time unit and adding the ending offset get.
  • the above-mentioned starting offset, ending offset, and first offset are configured or pre-configured by the network side, or implemented by the terminal, or are preset values specified for the communication protocol, or are determined by trigger information.
  • the specific determination method of the third resource selection window is the same as the method of the second resource selection window, and details are not described herein again.
  • the third resource selection window is not necessarily the same as the second resource selection window.
  • the second resource selection window is m+T21 to m+T22
  • the third resource selection window is m+T31 to m+T32.
  • both T22 and T32 need to be less than or equal to the preset value W, but T22 may not be equal to T32.
  • the first terminal excludes the resources in the third resource selection window according to the listening result in the resource listening window (step 1-2) and/or the non-listening time slot (step 1-1). If the resource in the set is not in the remaining resources after the resource is excluded, the resource is removed from the resource set before the update (corresponding to the situation that the resource set before the update is suitable for the second terminal), that is, the resource before the update is The intersection of the set and the second remaining resource set is determined as the updated resource set.
  • the first terminal excludes the resources in the third resource selection window according to the listening result in the resource listening window (step 1-2) and/or the non-listening time slot (step 1-1). If the excluded resource is not in the resource set before the update, the resource is added to the resource set before the update. (corresponding to the resource situation that the resource set before the update is not suitable for the second terminal). That is, the union of the resource set before the update and the second remaining resource set is determined as the updated resource set.
  • the first terminal determines the first time-frequency resource w and resource sets x, z, v, and y (resource sets).
  • Resource w is located in time slot m
  • T3 is the first offset.
  • the UE re-evaluates or updates the resource set at least in time slot m-T3.
  • the first terminal determines a resource listening window from m-T3-T20 to m-T3-Ts2, for example, T20 refers to T0 of the background part, and Ts2 refers to Tproc, 0 of the background part.
  • the first terminal determines a third resource selection window from m-T3+T31 to m-T3+T32.
  • the above-mentioned T31 refers to the definition of the background part T1
  • T32 refers to the definition of the background part T2.
  • the above-mentioned T31 or T32 is indicated by the trigger information.
  • T32 is less than or equal to the preset value W, where W is a preset value specified by the standard, and optionally, W is 32 time slots.
  • the first terminal determines the time slot f according to the indication of the trigger information, the above-mentioned determination of T31 should make the starting position of the third resource selection window be greater than or equal to the time slot f, or the above-mentioned determination of T32 should make the third resource selection window The end position of is less than or equal to time slot f.
  • the determination of T31 should make the starting position of the third resource selection window larger than the time slot where the last first time-frequency resource W to be sent is located.
  • the first terminal takes all available resources in the third resource selection window as the resource set A, and performs the above step 1 on the resource set A, including step 1-1 and/or step 1-2.
  • the parameters required by the first terminal when performing step 1, such as the SL-RSRP threshold, the priority of the data to be sent, etc., can be indicated by the trigger information, or configured by the network, or pre-configured or a preset value specified by the standard. If the resource z in the resource set is not in the remaining resource set after being excluded in step 1, the resource z is removed from the resource set, and the updated resource set includes x, v and y. Or if the excluded resource g is not in the resource set, the resource g is added to the resource set, and the updated resource set includes x, z, v, y and g.
  • the re-evaluation process of the auxiliary information includes:
  • a resource listening window is determined and a third resource selection window is determined.
  • the resources in the third resource selection window are excluded according to the listening result and/or the non-listening time slot in the resource listening window to obtain the second remaining resource set.
  • the intersection of the resource set before the update and the second remaining resource set is determined as the updated resource set; when the resources in the third resource set all belong to the updated resource set, it is determined that the 1-bit indication information is the first selected resource set. value; when the resources in the third resource set have resources that do not belong to the updated resource set, determine that the 1-bit indication information is the second value; or, use the union of the resource set before the update and the second remaining resource set , it is determined to be the updated resource set; when none of the resources in the third resource set belong to the updated resource set, it is determined that 1-bit indication information is the first value; When the resource of the latter resource set is used, it is determined that the 1-bit indication information is the second value;
  • the third resource set is indicated by trigger information.
  • the re-evaluation process of the auxiliary information includes:
  • the first sideline control information heard by the first terminal refers to the first sideline control information that causes the resources in the updated resource set to be excluded.
  • the first sideline control information that causes the resources in the updated resource set to be excluded may carry a different priority and/or resource reservation period than before the update. If the priority and/or the resource reservation period are different from those before the update, the priority and/or the resource reservation period carried in the first sideline control information heard by the first terminal need to be updated.
  • the first terminal sends (updated) assistance information to the second terminal on the first time-frequency resource.
  • the second terminal performs its own resource exclusion process according to the auxiliary information.
  • auxiliary information carries at least one of the following information:
  • PC5 interface radio resource control (PC5-Radio ResourceControl, PC5-RRC) signaling;
  • a media access control layer control unit (MediumAccessControlControlElement, MACCE);
  • the first sideline control information is the sideline control information carried in the PSCCH
  • the second sideline control information is the sideline control information carried in the PSSCH.
  • the method provided in this embodiment by re-evaluating the auxiliary information at least once, can make the auxiliary information provided by the terminal to other terminals more accurate, and other terminals can use the more accurate auxiliary information to select resources, which can better It can effectively avoid resource collision and improve communication reliability.
  • FIG. 14 shows a flowchart of an information sending method provided by an exemplary embodiment of the present application. This embodiment is illustrated by taking the method applied to the first terminal shown in FIG. 8 as an example. The method includes:
  • Step 320 Determine the first time-frequency resource
  • Step 340 Re-evaluate the first time-frequency resource at least once before the first time-frequency resource
  • Step 360 determine auxiliary information
  • the auxiliary information is determined according to the re-evaluated position of the first time-frequency resource.
  • Before the first time-frequency resource can be understood as: before the time unit where the first time-frequency resource is located.
  • re-evaluation may also be referred to as at least one of re-evaluation, secondary evaluation, and evaluation.
  • the term of "re-evaluation" is not limited in the embodiments of the present application.
  • the first terminal re-evaluates the first time-frequency resource at least once.
  • the re-evaluation of the first time-frequency resource refers to: evaluating whether the first time-frequency resource is available, and if not, reselecting the first time-frequency resource.
  • step 320 For step 320:
  • the manner of determining the first time-frequency resource includes at least two manners:
  • Manner 1 the first terminal determines the resource listening window, and determines the first resource selection window; the first terminal determines the resource listening window according to the listening result (step 1-2) and/or the non-listening time slot (step 1) -1), exclude the resources in the first resource selection window to obtain the first remaining resource set, and the first remaining resource set includes the remaining resources that are not excluded; when the first terminal selects the first resource in the first remaining resource set frequency resources.
  • the first terminal determines a time unit n; and determines a start position and an end position of the resource listening window based on the time unit n.
  • the first terminal determines a time unit n; and determines a first start position and a first end position of the first resource selection window based on the time unit n.
  • the offset of the first end position relative to the time unit n is less than or equal to W, which is indicated in the trigger information or configured or preconfigured by the network side or a preset value specified for the communication protocol; or, the first end The position is less than or equal to the absolute slot e, which is indicated by the trigger information.
  • the time unit n is the time slot in which the trigger information is received by the first terminal, or the time unit n is the time slot in which the first terminal decodes the trigger information, or the time unit n is the time slot determined by the first terminal to satisfy the sending condition.
  • Time slot, trigger information is information that triggers cooperation between terminals
  • transmission condition is the condition that triggers the transmission of auxiliary information.
  • the specific position of the time unit n is not limited in this embodiment, and the foregoing three examples are only possible positions of the time unit n.
  • the first terminal determines the resource listening window based on the time unit n, the start position of the resource listening window is n-T10, and the end position of the resource listening window is n-Ts.
  • the time unit n is the time slot in which the trigger information is received or decoded by the first terminal, or the time slot in which the first terminal determines that the sending condition is satisfied.
  • the above trigger information is used to trigger cooperation between terminals, and the above sending condition may be, for example, that the current time slot satisfies the condition for periodically sending auxiliary information.
  • T10 and TS refer to the definitions of T0 and Tproc,0 above.
  • the first terminal further determines the first resource selection window based on the time unit n, where the first start position of the first resource selection window is n+T11, and the first end position of the first resource selection window is n+T12.
  • the first terminal determines one or more first time-frequency resources for transmitting auxiliary information within the first resource selection window.
  • T11 refers to the aforementioned T1
  • T12 refers to the aforementioned T2.
  • T12 is less than or equal to W, and W is indicated in the trigger information or configured or pre-configured by the network side or a preset value specified for the communication protocol.
  • the first terminal determines the absolute time slot e according to the indication of the trigger information, and the determination of T12 should satisfy that n+T12 is less than or equal to the time slot e.
  • the first terminal takes all available resources in the first resource selection window as the resource set A, performs step 1 above on the resource set A and randomly selects one or more first time-frequency resources therefrom.
  • the parameters required by the first terminal when performing step 1, such as the SL-RSRP threshold, the priority of the data to be sent, etc., can be indicated by the trigger information, or configured by the network side, or pre-configured, or pre-configured for the communication protocol. set value.
  • the priority of the data to be sent is set to the highest priority, or any priority higher than or equal to the priority threshold.
  • the priority threshold is configured or preconfigured by the network or a preset value specified for the communication protocol.
  • the first time-frequency resource occupies one time slot in the time domain, and occupies one subchannel in the frequency domain.
  • resources p and w in FIG. 15 are two first time-frequency resources determined by the first terminal.
  • the first terminal determines the first time-frequency resource based on the time unit and sub-channel position of the trigger information, where the trigger information is information that triggers cooperation between terminals.
  • the first terminal determines the time after the time unit t+k (including the time unit t+k).
  • the auxiliary information is sent in M consecutive time units including PSFCH resources.
  • k is configured or pre-configured by the network side or a preset value specified for the communication protocol, for example, k is 2.
  • the above-mentioned M first time-frequency resources are M PSFCH resources in the M time units (including one in each time unit).
  • the frequency domain positions of the M PSFCH resources in respective time units are determined by the position of the sub-channel where the trigger information is received by the first terminal or the starting position of the sub-channel.
  • the corresponding relationship between the sub-channel position and one or more PSFCH resources, or the corresponding relationship between the starting position of the sub-channel and one or more PSFCH resources is specified by the network side configuration or pre-configuration or the communication protocol.
  • the first terminal determines the corresponding frequency domain positions of the M PSFCH resources according to the sub-channel position or the sub-channel start position on which the trigger information is received.
  • the above-mentioned M is 1 or any positive integer
  • the above-mentioned time unit is a time slot, a symbol or a subframe.
  • the above-mentioned sub-channel positions may refer to the positions of a single sub-channel or the positions of multiple sub-channels.
  • each PSFCH resource occupies one or two symbols in the time domain, and occupies one PRB in the frequency domain.
  • the second time unit determined after subtracting the second offset from the target time unit re-evaluate the first time-frequency resource that has not been sent yet, or re-evaluate the first time-frequency resource that is about to pass through the first side line in the target time unit.
  • the time-frequency resources indicated by the first sideline control information in the target time unit include: the first time-frequency resources indicated by the first sideline control information in the target time unit.
  • the target time unit is any one of the multiple first time-frequency resources, or the first first time-frequency resource among the multiple first time-frequency resources A time-frequency resource, or the last first time-frequency resource among multiple first time-frequency resources.
  • the second offset is: an offset configured on the network side; or, a pre-configured offset; or, an offset implemented by the first terminal; or, an offset specified by a communication protocol ; or, the offset indicated by the trigger information, where the trigger information is information used to trigger cooperation between terminals.
  • the first terminal determines two first time-frequency resources w and p, and the resource w is located in the time slot m.
  • the first terminal re-evaluates resource w and resource p, or the time-frequency resource indicated by the first sideline control information to be sent in resource w, or only resource w at least in time slot m-T4.
  • the first terminal re-evaluates the first resource p at least in the time slot corresponding to the time slot where the resource p is located minus the second offset T4.
  • the re-evaluation process of the first time-frequency resource includes:
  • the start position and the end position of the resource listening window are determined according to the target time unit where the first time-frequency resource is located.
  • the second time unit determined by subtracting the second offset T4 from the target time unit, the start position and the end position of the resource listening window are determined.
  • the fourth start position and the fourth end position of the fourth resource selection window are determined according to the target time unit where the first time-frequency resource is located.
  • the target time unit is each of the multiple first time-frequency resources, or the first first time-frequency resource among the multiple first time-frequency resources frequency resource, or the last first time-frequency resource among multiple first time-frequency resources.
  • the fourth starting position is obtained by subtracting the second offset from the target time unit and then adding the starting offset
  • the fourth ending position is obtained by subtracting the second offset from the target time unit and adding the ending offset. Shift is obtained.
  • the above-mentioned start offset, end offset, and second offset are configured or pre-configured by the network side, or implemented by the terminal, or are preset values specified for the communication protocol, or are determined by trigger information.
  • the first terminal re-evaluates resource w and resource p.
  • the first terminal determines a resource listening window from m-T4-T20 to m-T4-Ts2.
  • T20 and TS2 refer to the definitions of TO and Tproc,0 above.
  • the first terminal determines a fourth resource selection window from m-T4+T41 to m-T4+T42.
  • T41 refers to T1 of the background part
  • T42 refers to T2 of the background part.
  • T42 is less than or equal to W
  • W indicates in the trigger information or is configured or pre-configured by the network or is a preset value specified by the standard.
  • the first terminal determines the absolute time slot e according to the indication of the trigger information, and the determination of T42 should satisfy that m-T4+T42 is less than or equal to the time slot e.
  • the first terminal uses all available resources in the fourth resource selection window as the resource set A, and after performing the above step 1 on the resource set A, if the first time-frequency resource w or p is not in the resource set A, the first terminal executes the steps 2. Reselect resources in the resource set A that are not in the resource set A in the first time-frequency resources w and p.
  • the parameters required by the first terminal when performing step 1, such as the SL-RSRP threshold, the priority of the data to be sent, etc., can be indicated by the trigger information, or configured by the network, or pre-configured or a preset value specified by the standard.
  • the priority of the data to be sent is set to the highest priority, or any priority higher than or equal to the priority threshold.
  • the priority threshold is configured or pre-configured by the network or is a specified preset value.
  • the first terminal When the first terminal re-evaluates one or more times, it is judged that after a certain first time-frequency resource is sent, or the first terminal is about to send at a certain first time-frequency resource, or the first terminal judges that it does not need to give up the first time-frequency resource After being sent on a time-frequency resource, the first terminal determines the auxiliary information. For example, it is determined by re-evaluation that the first time-frequency resource is in the set of remaining resources after resource exclusion.
  • the above-mentioned re-evaluation refers to the re-evaluation performed by the time unit corresponding to the time unit where the first time-frequency resource is located minus the second offset, or the last re-evaluation performed before the first time-frequency resource is sent. Evaluate.
  • the first terminal determines that it is not necessary to give up sending the auxiliary information on the determined PSFCH resource.
  • the resource set determined according to the re-evaluated first time-frequency resource includes:
  • the first resource set is determined as the auxiliary information, and the first resource set is determined based on the listening process of the first terminal;
  • the first set of resources includes non-excluded resources or excluded resources. In the case where the first resource set includes excluded resources, the first resource set is used to indicate resources that are not suitable for the second terminal. In the case where the first resource set includes resources that are not excluded, the first resource set is used to indicate resources suitable for the second terminal.
  • the second resource set is determined as the auxiliary information, and the second resource set is determined based on the time unit where the information transmission of the first terminal is located;
  • the second resource set is used to indicate resources that are not suitable for the second terminal.
  • Mode 3 Determine the union of the first resource set and the second resource set as auxiliary information
  • the first resource set is used to indicate resources not suitable for the second terminal
  • a union of the first resource set and the second resource set is determined as the auxiliary information.
  • Manner 4 Determine the difference set between the first resource set and the second resource set as auxiliary information.
  • a difference set between the first resource set and the second resource set is determined as the auxiliary information.
  • the first set of resources includes non-excluded resources or excluded resources. In the case where the first resource set includes excluded resources, the first resource set is used to indicate resources that are not suitable for the second terminal. In the case where the first resource set includes resources that are not excluded, the first resource set is used to indicate resources suitable for the second terminal.
  • the first terminal determines the resource listening window, and determines the second resource selection window; according to the listening result and/or the non-listening time slot in the resource listening window, excludes the resources in the second resource selection window, and determines Collection of resources.
  • the second starting position and the second ending position of the second resource selection window are determined according to the target time unit where the first time-frequency resource is located.
  • the target time unit is any one of the multiple first time-frequency resources, or the first first time-frequency resource among the multiple first time-frequency resources frequency resource, or the last first time-frequency resource among multiple first time-frequency resources.
  • the second start position of the second resource selection window in the time domain is obtained by adding the target time unit to the start offset, and the second end position is obtained by adding the target time unit and the end offset.
  • the second start position is obtained by subtracting the advance offset from the target time unit and then adding the start offset
  • the second end position is obtained by subtracting the advance offset from the target time unit and adding the end offset.
  • the above-mentioned start offset, end offset, and advance offset are configured or pre-configured by the network side, or implemented by the terminal, or are preset values specified for the communication protocol, or are determined by trigger information.
  • the first terminal determines two first time-frequency resources p and w, and the resource w is located in the time slot m.
  • the first terminal re-evaluates resources w and p at time slot m-T3.
  • the first terminal determines that the resource w is in the remaining resource set after the resources are excluded in the re-evaluation process, that is, the first terminal can transmit auxiliary information on the resource w, and the first terminal determines the auxiliary information.
  • the first terminal determines the resource listening window from m-T4-T20 to m-T4-Ts2 (that is, the listening window used in the re-evaluation process is reused).
  • T20 and Ts2 refer to T0 and Tproc above, Definition of 0.
  • the first terminal determines that the second resource selection window is: time slot m+T21 to time slot m+T22. Or m-T3+T21 to m-T3+T22.
  • the above-mentioned T21 refers to the definition of the background part T1
  • T22 refers to the definition of the background part T2.
  • the above-mentioned T21 or T22 is indicated by the trigger information.
  • T22 is less than or equal to the preset value W, where W is a preset value specified by the standard, and optionally, W is 22 time slots.
  • the first terminal determines the time slot f according to the indication of the trigger information, the above-mentioned determination of T21 should make the starting position of the second resource selection window be greater than or equal to the time slot f, or the above-mentioned determination of T22 should make the second resource selection window The end position of is less than or equal to time slot f.
  • the starting position of the second resource selection window should be after the time slot where the first resource w to be sent is located.
  • the first terminal takes all available resources in the second resource selection window as the resource set A, and performs the above step 1 on the resource set A, including step 1-1 and/or step 1-2.
  • the parameters required by the first terminal when performing step 1, such as the SL-RSRP threshold, the priority of the data to be sent, etc., can be indicated by the trigger information, or configured by the network, or pre-configured or a preset value specified by the standard.
  • the first resource set includes resources excluded or not excluded by the first terminal performing step 1.
  • the first resource set includes resources x, z, v and resource y in FIG. 17 .
  • For the second mode determine the second resource set as the auxiliary information, and the second resource set is determined based on the time unit where the information transmission of the first terminal is located;
  • the first terminal determines all the time-frequency resources in the time unit where the first terminal performs information transmission as the second resource set.
  • the second resource set is used to indicate resources that are not suitable for the second terminal.
  • the second resource set includes all time-frequency resources in a time unit where the first terminal performs data transmission or auxiliary information transmission or trigger information transmission.
  • the second resource set includes all the time-frequency resources in the time unit where the first terminal performs data transmission or auxiliary information transmission or trigger information transmission in the future.
  • the second resource set includes, in the first In the second resource selection window, all time-frequency resources in the time unit where the first terminal performs data transmission, auxiliary information transmission, or trigger information transmission.
  • the manner of determining the 1-bit indication information includes any one of the following two manners.
  • Manner 1 Determine a resource set (see Introduction 1 above), the resource set is used to indicate resources suitable for the second terminal; when all the resources in the third resource set belong to the resource set, determine the 1-bit indication information as the first value ; When the resources in the third resource set have resources that do not belong to the resource set, determine that the 1-bit indication information is the second value; the third resource set is indicated by the trigger information. That is, the third resource set is the resource indicated by the second terminal, or the resource selected by the second terminal.
  • Manner 2 Determine a resource set (see introduction 1 above), the resource set is used to indicate resources that are not suitable for the second terminal; when none of the resources in the third resource set belong to the resource set, determine 1-bit indication information as the first value; when the resources in the third resource set have resources belonging to the resource set, determine that the 1-bit indication information is the second value; wherein, the third resource set is indicated by the trigger information.
  • the first value is 1, and the second value is 0.
  • the first value is 0 and the second value is 1.
  • auxiliary information includes the priority and/or the resource reservation period carried in the first sideline control information sensed by the first terminal.
  • the first sideline control information heard by the first terminal may refer to the first sideline control information that causes the resources in the resource set to be excluded in the first introduction by the first terminal.
  • the above resource set includes resources x, z, v, and y in FIG. 17. Due to the indications of the first sideline control information 1, 2, 3, and 4 heard by the first terminal, the resources x, z, v, and y y is excluded, the auxiliary information includes the priority and/or the resource reservation period carried in the first sideline control information 1, 2, 3 and 4.
  • the first sideline control information sensed by the first terminal may refer to the first sideline control information sensed by the first terminal in one or more specific time units.
  • the above-mentioned specific one or more time units may be the time units that the transmitting end of the first terminal sends, or the time units that the first terminal receives data, or are configured or pre-configured by the network side or configured by the first terminal.
  • a terminal-implemented time unit may be the time units that the transmitting end of the first terminal sends, or the time units that the first terminal receives data, or are configured or pre-configured by the network side or configured by the first terminal.
  • the auxiliary information is sent on the re-evaluated first time-frequency resource.
  • the PSFCH data corresponding to the first time-frequency resource is preferentially sent, and the PSFCH data carries auxiliary information.
  • the first terminal determines whether it is necessary to transmit and receive the PSFCH in a certain time unit. If the purpose of sending the PSFCH is to send auxiliary information, the PSFCH is sent first, and the reception of the PSFCH is abandoned. Specifically, when comparing the priorities of sending the PSFCH and receiving the PSFCH, the priority of sending the PSFCH is taken as the highest priority, or any priority higher than a priority threshold.
  • the first terminal determines that K PSFCHs are to be sent in a certain time unit, but the first terminal can only send F PSFCHs. At this time, it is necessary to abandon the transmission of K-F PSFCHs.
  • a PSFCH that transmits Hybrid Automatic Repeat Request (HARQ) information is taken as the highest priority, or any priority higher than a certain priority threshold.
  • any one of the above priorities that is higher than a certain priority threshold means that the priority is higher, and is applicable to the case where the higher the value is, the higher the priority is. If the value is smaller, the priority is higher, which is any priority lower than a certain priority threshold.
  • the above-mentioned priority threshold is configured or pre-configured by the network or the implementation of the first terminal or a value specified for the communication protocol.
  • auxiliary information carries at least one of the following information:
  • the first sideline control information is the sideline control information carried in the PSCCH
  • the second sideline control information is the sideline control information carried in the PSSCH.
  • this embodiment by re-evaluating the first time-frequency resource before the first time-frequency resource, it is possible to determine the assistance when the re-evaluation result of the first time-frequency resource is available. information. Since the amount of calculation of the auxiliary information is relatively large, this embodiment can reduce the amount of calculation of the auxiliary information as much as possible, thereby avoiding the waste of resources of the first terminal.
  • the auxiliary information or the first time-frequency resource for at least one reassessment;
  • the auxiliary information or the first time-frequency resource is re-evaluated at least once before the first time-frequency resource
  • the auxiliary information or the first time-frequency resource is re-reviewed at least once before the first time-frequency resource.
  • the auxiliary information or the first time-frequency resource is re-processed at least once before the first time-frequency resource. Evaluate.
  • the designated priority is a priority higher or lower than the priority threshold.
  • the priority threshold is a threshold configured by the network side, or a preconfigured threshold, or a threshold implemented based on the first terminal.
  • the method provided in this embodiment re-evaluates the auxiliary information or the first time-frequency resource only when the channel state is poor, and can reduce the number of first terminals when the channel state is better calculation amount.
  • FIG. 18 is a block diagram illustrating an apparatus for transmitting information provided by an exemplary embodiment of the present application.
  • the device includes:
  • An evaluation module 840 configured to re-evaluate the auxiliary information or the first time-frequency resource at least once before the first time-frequency resource;
  • the first time-frequency resource is a resource used to send the auxiliary information
  • the auxiliary information is information used to assist the second terminal.
  • the evaluation module 840 is configured to re-evaluate the auxiliary information at least in the first time unit determined after subtracting the first offset from the target time unit;
  • the target time unit is any one first time-frequency resource among multiple first time-frequency resources, or the first first time-frequency resource among multiple first time-frequency resources, or multiple first time-frequency resources.
  • the first offset is: an offset configured on the network side; or, a pre-configured offset; or, an offset implemented by the device; or, The offset specified by the communication protocol; or, the offset indicated by trigger information, where the trigger information is information used to trigger cooperation between terminals.
  • the evaluation module 840 is configured to re-resolve the unsent first time-frequency resources at least in the second time unit determined after subtracting the second offset from the target time unit Evaluating or re-evaluating the time-frequency resource to be indicated by the first sideline control information in the target time unit or the first time-frequency resource in the target time unit;
  • the target time unit is any one of the multiple first time-frequency resources, or the first first time-frequency resource of the multiple first time-frequency resources, or multiple first time-frequency resources.
  • the second offset includes:
  • the offset configured on the network side; or, the pre-configured offset; or, the offset implemented by the device; or, the offset specified by the communication protocol; or, the offset indicated by the trigger information , where the trigger information is information used to trigger cooperation between terminals.
  • the device further includes:
  • a first determining module 822 configured to determine the first time-frequency resource
  • the second determining module 824 is configured to determine the auxiliary information. In one case, the second determination module 824 is used to determine the auxiliary information before re-evaluation. In one case, the second determination module 824 is configured to determine the auxiliary information after re-evaluation.
  • the first determining module 822 is configured to determine a resource listening window and determine a first resource selection window; Listening to the time slot, excluding resources in the first resource selection window to obtain a first remaining resource set; and selecting the first time-frequency resource in the first remaining resource set.
  • the first determining module 822 is configured to determine a time unit n; determine a first start position and a first end position of the first resource selection window based on the time unit n, n is a positive integer.
  • the first determining module 822 is configured to determine the first time-frequency resource based on the time unit and sub-channel position of the trigger information
  • the trigger information is information that triggers cooperation between terminals.
  • the auxiliary information includes at least one of the following four kinds of information:
  • the auxiliary information includes the resource set; the second determining module 824 is configured to determine a first resource set as the auxiliary information, where the first resource set is based on the determined by the listening process of the first terminal; or, determine a second resource set as the auxiliary information, and the second resource set is determined based on the time unit in which the information of the first terminal is transmitted; or, determine The union of the first resource set and the second resource set is used as the auxiliary information; or, the difference set of the first resource set and the second resource set is determined as the auxiliary information.
  • the auxiliary information is determined based on the first resource set
  • the second determination module 824 is configured to determine a resource listening window and determine a second resource selection window; The resources in the resource selection window are excluded to determine the first resource set.
  • the second determining module 824 is configured to determine the second starting position and the second starting position of the second resource selection window according to the target time unit where the first time-frequency resource is located. two end positions;
  • the target time unit is: a time unit where any one of the multiple first time-frequency resources is located; or, the first first time-frequency resource among the multiple first time-frequency resources The time unit where the time-frequency resource is located; or, the time unit where the last first time-frequency resource in the plurality of first time-frequency resources is located.
  • the auxiliary information is determined based on the second resource set
  • the second determining module 824 is configured to determine all the time-frequency resources in the time unit where the first terminal performs information transmission as the second resource set.
  • the auxiliary information includes the 1-bit indication information
  • the second determining module 824 is configured to determine a resource set, where the resource set is used to indicate a resources; when all the resources in the third resource set belong to the resource set, the 1-bit indication information is determined to be the first value; the resources in the third resource set have resources that do not belong to the resource set resource, determine that the 1-bit indication information is the second value; or, determine a resource set, where the resource set is used to indicate resources that are not suitable for the second terminal; none of the resources in the third resource set belong to In the resource set, the 1-bit indication information is determined to be the first value; when the resources in the third resource set have resources belonging to the resource set, the 1-bit indication information is determined to be the second value. value;
  • the third resource set is indicated by trigger information.
  • the auxiliary information includes a resource set
  • the evaluation module 840 is configured to determine a resource listening window and determine a third resource selection window before the first time-frequency resource; and the resources in the third resource selection window are excluded to obtain the second remaining resource set; the intersection of the resource set before the update and the second remaining resource set is determined as the updated resource or, the union of the resource set before the update and the second remaining resource set is determined as the updated resource set.
  • the auxiliary information includes 1-bit indication information
  • the evaluation module 840 is used to determine the resource listening window and determine the third resource selection window; according to the listening result and/or the non-listening time slot in the resource listening window, select the third resource for the third resource selection window. Exclude the resources in the resource set to obtain the second remaining resource set; determine the intersection of the resource set before the update and the second remaining resource set as the updated resource set; the resources in the third resource set belong to In the updated resource set, determine that the 1-bit indication information is the first value; when the resources in the third resource set have resources that do not belong to the updated resource set, determine the The 1-bit indication information is the second value; or, the union of the resource set before the update and the second remaining resource set is determined as the updated resource set; the resources in the third resource set belong to In the updated resource set, determine that the 1-bit indication information is the first value; when the resources in the third resource set have resources belonging to the updated resource set, determine the 1-bit indication information The bit indication information is the second value;
  • the third resource set is indicated by trigger information.
  • the evaluation module 840 is configured to determine a resource listening window and determine a fourth resource selection window; time slot, exclude the resources in the fourth resource selection window to obtain a third remaining resource set; if the first time-frequency resource does not belong to the third remaining resource set, reselect the third remaining resource set Time-frequency resources.
  • the device further includes:
  • the sending module 860 is configured to preferentially send the PSFCH data corresponding to the first time-frequency resource when other PSFCH data needs to be sent or received, where the PSFCH data carries the auxiliary information.
  • the evaluating module 840 is configured to, before the first time-frequency resource, evaluate the The auxiliary information or the first time-frequency resource is re-evaluated at least once;
  • the evaluating module 840 is configured to evaluate the auxiliary information or the first time-frequency resource before the first time-frequency resource when the CBR or the CR is lower than the second threshold conduct at least one reassessment;
  • the evaluating module 840 is configured to, before the first time-frequency resource, evaluate the auxiliary information or the The first time-frequency resource is re-evaluated at least once;
  • the evaluating module 840 is configured to, before the first time-frequency resource, evaluate the auxiliary information or The first time-frequency resource is re-evaluated at least once.
  • the designated priority is a priority higher or lower than a priority threshold
  • the priority threshold is a threshold configured by the network side, or a preconfigured threshold, or a threshold implemented based on the terminal.
  • the auxiliary information carries at least one of the following information:
  • PC5-RRC signaling MAC CE; the first sideline control information; the second sideline control information; the information carried on the PSFCH;
  • the first sideline control information is the sideline control information carried in the PSCCH
  • the second sideline control information is the sideline control information carried in the PSSCH.
  • FIG. 19 shows a schematic structural diagram of a terminal provided by an exemplary embodiment of the present application.
  • the terminal includes: a processor 101 , a receiver 102 , a transmitter 103 , a memory 104 , and a bus 105 .
  • the processor 101 includes one or more processing cores, and the processor 101 executes various functional applications and information processing by running software programs and modules.
  • the receiver 102 and the transmitter 103 may be implemented as a communication component, which may be a communication chip.
  • the memory 104 is connected to the processor 101 through the bus 105 .
  • the memory 104 may be configured to store at least one instruction, and the processor 101 may be configured to execute the at least one instruction, so as to implement various steps in the foregoing method embodiments.
  • the transmitter 103 is used to perform the steps related to sending; the receiver 104 is used to perform the steps related to receiving; the processor 101 is used to perform the steps other than sending and receiving.
  • memory 104 may be implemented by any type or combination of volatile or non-volatile storage devices including, but not limited to, magnetic or optical disks, electrically erasable programmable Read Only Memory (Electrically-Erasable Programmable Read Only Memory, EEPROM), Erasable Programmable Read Only Memory (EPROM), Static Random Access Memory (SRAM), Read Only Memory (Read-Only Memory, ROM), magnetic memory, flash memory, programmable read-only memory (Programmable Read-Only Memory, PROM).
  • volatile or non-volatile storage devices including, but not limited to, magnetic or optical disks, electrically erasable programmable Read Only Memory (Electrically-Erasable Programmable Read Only Memory, EEPROM), Erasable Programmable Read Only Memory (EPROM), Static Random Access Memory (SRAM), Read Only Memory (Read-Only Memory, ROM), magnetic memory, flash memory, programmable read-only memory (Programmable Read-Only Memory, PROM).
  • a computer-readable storage medium stores at least one instruction, at least one piece of program, code set or instruction set, the at least one instruction, the At least one section of program, the code set or the instruction set is loaded and executed by the processor to implement the information sending method or the resource reselection method provided by the above method embodiments.
  • a computer program product or computer program comprising computer instructions stored in a computer readable storage medium from which a processor of a communication device is readable by a computer
  • the computer instruction is read by reading the storage medium, and the processor executes the computer instruction, so that the communication device executes the information sending method or the resource reselection method described in the above aspects.

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

Abstract

La présente demande se rapporte au domaine des communications mobiles. Sont divulgués un procédé et un appareil d'envoi d'informations, ainsi qu'un terminal et un support d'informations. Le procédé consiste : avant une première ressource temps-fréquence, à réaliser au moins une réévaluation sur des informations auxiliaires ou la première ressource temps-fréquence, la première ressource temps-fréquence étant une ressource servant à envoyer les informations auxiliaires, et les informations auxiliaires étant des informations servant à aider un second terminal. Au moyen de la présente demande, des informations auxiliaires fournies pour un second terminal par un premier terminal sont plus précises et le second terminal effectue une sélection de ressources à l'aide des informations auxiliaires plus précises, de telle sorte qu'une collision de ressources peut être efficacement empêchée, ce qui permet d'améliorer la fiabilité de la communication.
PCT/CN2021/078880 2021-03-03 2021-03-03 Procédé et appareil d'envoi d'informations, terminal et support de stockage WO2022183405A1 (fr)

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PCT/CN2021/078880 WO2022183405A1 (fr) 2021-03-03 2021-03-03 Procédé et appareil d'envoi d'informations, terminal et support de stockage

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