WO2021155556A1 - 资源选择方法、装置、终端和介质 - Google Patents

资源选择方法、装置、终端和介质 Download PDF

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Publication number
WO2021155556A1
WO2021155556A1 PCT/CN2020/074476 CN2020074476W WO2021155556A1 WO 2021155556 A1 WO2021155556 A1 WO 2021155556A1 CN 2020074476 W CN2020074476 W CN 2020074476W WO 2021155556 A1 WO2021155556 A1 WO 2021155556A1
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WO
WIPO (PCT)
Prior art keywords
resource
time slot
listening window
terminal
configuration signaling
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Application number
PCT/CN2020/074476
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English (en)
French (fr)
Inventor
丁伊
赵振山
林晖闵
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Oppo广东移动通信有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority to CA3166472A priority Critical patent/CA3166472A1/en
Priority to IL294978A priority patent/IL294978A/en
Priority to CN202211448612.8A priority patent/CN115835378A/zh
Priority to CN202080092150.3A priority patent/CN114930933A/zh
Priority to BR112022015430A priority patent/BR112022015430A2/pt
Priority to JP2022545919A priority patent/JP2023518654A/ja
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 KR1020227026122A priority patent/KR20220137892A/ko
Priority to EP20917893.8A priority patent/EP4080953A4/en
Priority to PCT/CN2020/074476 priority patent/WO2021155556A1/zh
Priority to MX2022009697A priority patent/MX2022009697A/es
Publication of WO2021155556A1 publication Critical patent/WO2021155556A1/zh
Priority to US17/871,199 priority patent/US20220361151A1/en

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    • 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
    • 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
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/0446—Resources in time domain, e.g. slots or frames
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W92/00—Interfaces specially adapted for wireless communication networks
    • H04W92/16—Interfaces between hierarchically similar devices
    • H04W92/18—Interfaces between hierarchically similar devices between terminal devices
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/50—Allocation or scheduling criteria for wireless resources
    • H04W72/56—Allocation or scheduling criteria for wireless resources based on priority criteria
    • H04W72/566—Allocation or scheduling criteria for wireless resources based on priority criteria of the information or information source or recipient
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

Definitions

  • This application relates to the field of wireless communication, and in particular to a method, device, terminal, and medium for resource selection.
  • the terminal In a transmission mode of SL, the terminal needs to select resources in the resource pool.
  • the terminal determines the resource selection window and the resource listening window, and according to the listening result of the resource listening window, excludes the resources in the resource selection window, and obtains candidate resources of the service to be transmitted (rejected resources).
  • the terminal randomly selects a resource from the candidate resources to transmit a service to another terminal, including the initial transmission and retransmission of the service.
  • the embodiments of the present application provide a resource selection method, device, terminal, and medium.
  • the technical solution is as follows.
  • a resource selection method which is applied to a first terminal, and the method includes:
  • resource reselection is performed on the selected resource.
  • a resource selection device which is applied to a first terminal, and the device includes:
  • a determining module configured to determine a resource listening window, where the resource listening window includes a part of the time slot before the time slot m where the selected resource is located;
  • the reselection module is configured to perform resource reselection on the selected resource when a resource conflict occurs between the selected resource and the reserved resource of the second terminal as a result of the monitoring of the resource monitoring window.
  • a device for a resource selection method including:
  • a determining module configured to determine a resource listening window, where the resource listening window includes a part of the time slot before the time slot m where the selected resource is located;
  • the reselection module is configured to perform resource reselection on the selected resource when a resource conflict occurs between the selected resource and the reserved resource of the second terminal as a result of the monitoring of the resource monitoring window.
  • 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 resource selection method as described in the above aspect.
  • a computer-readable storage medium is provided, and executable instructions are stored in the readable storage medium, and the executable instructions are loaded and executed by the processor to implement the aforementioned aspects.
  • Resource selection method is provided.
  • the resource listening window determined by the terminal only includes a part of the time slots before the time slot m where the selected resource is located, rather than all time slots. Therefore, in the listening process of resource reselection, the time required to listen is reduced and saved The power consumption of the terminal is improved, and the endurance of the terminal is improved.
  • FIG. 1 is a schematic diagram of a transmission mode of a side link in a related technology of the present application
  • Figure 2 is a schematic diagram of resource selection in LTE-V2X in a related technology of the present application
  • FIG. 3 is a block diagram of the physical layer structure of NR-V2X in a related technology of the present application
  • Figure 4 is a schematic diagram of TB transmission in a related technology of the present application.
  • Figure 5 is a schematic diagram of a resource selection method in a related technology of the present application.
  • Fig. 6 is a schematic diagram of a resource selection method in a related technology of the present application.
  • Fig. 7 is a block diagram of a communication system supporting sideline transmission provided by an exemplary embodiment of the present application.
  • Fig. 8 is a schematic diagram of a resource selection method provided by an exemplary embodiment of the present application.
  • Fig. 9 is a schematic diagram of a resource selection method provided by an exemplary embodiment of the present application.
  • FIG. 10 is a time-frequency schematic diagram of a resource listening window provided by an exemplary embodiment of the present application.
  • Fig. 11 is a time-frequency schematic diagram of a resource listening window provided by an exemplary embodiment of the present application.
  • Fig. 12 is a time-frequency schematic diagram of a resource listening window provided by an exemplary embodiment of the present application.
  • FIG. 13 is a time-frequency schematic diagram of a resource listening window provided by an exemplary embodiment of the present application.
  • FIG. 14 is a schematic diagram of a resource selection method provided by an exemplary embodiment of the present application.
  • FIG. 15 is a schematic diagram of configuration performed by a network device according to an exemplary embodiment of the present application.
  • FIG. 16 is a schematic diagram of a vehicle team provided by an exemplary embodiment of the present application.
  • FIG. 17 is a schematic diagram of configuration by a third terminal as a group head provided by an exemplary embodiment of the present application.
  • FIG. 18 is a schematic diagram of a resource selection method provided by an exemplary embodiment of the present application.
  • FIG. 19 is a structural block diagram of a resource selection device provided by an exemplary embodiment of the present application.
  • FIG. 20 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 roadside infrastructure (V2I) communication, and vehicle to pedestrian (Vehicle to People, V2P) communication.
  • V2X applications will improve driving safety, reduce congestion and vehicle energy consumption, and improve traffic efficiency.
  • Side Link (SL) transmission It is a device-to-device communication method with high spectrum efficiency and low transmission delay.
  • mode A and mode B two side link transmission modes are defined: mode A and mode B.
  • mode A the transmission resources of the terminal are allocated by the base station through the downlink, and the terminal transmits data on the side link according to the resources allocated by the base station; the base station can be the terminal Allocating resources for a single transmission can also allocate resources for semi-static transmission to the terminal.
  • mode B the terminal selects a resource 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.
  • the terminal can select transmission resources from the resource pool by means of listening.
  • resource selection is required.
  • the terminal will select the resource within [n+T1,n+T2] milliseconds based on the listening results in the past 1 second.
  • a new data packet arrives at time n, and resource selection needs to be performed, and the resource listening window is [n-1000, n].
  • the service delay requirement is 100ms, and the resource selection window is [n+4,n+100].
  • the process for the terminal to select resources in the resource selection window is as follows (for the specific resource selection process, please refer to the operation steps in 3GPP TS36.213. Here are a few main resource selection steps):
  • the terminal regards all available resources in the resource selection window as a set A, and the terminal performs an operation to exclude resources in the set A.
  • Step 1 If the terminal sends data in some subframes in the resource listening window without listening, then the resources of these subframes on the corresponding subframes in the resource selection window are excluded.
  • Step 2 If the terminal detects the physical sidelink control channel (PSCCH) in the resource listening window, measure the reference signal received power of the physical sidelink shared channel (PSSCH) scheduled by the PSCCH (Reference Signal Received Power, RSRP), if the measured PSSCH-RSRP is higher than the PSSCH-RSRP threshold, and according to the reservation information in the control information transmitted in the PSCCH, determine the resource selection of the transmission resources reserved by another terminal in the terminal Within the window, the terminal excludes the resource from set A. Among them, the selection of the PSSCH-RSRP threshold is determined by the priority information carried in the detected PSCCH and the priority of the data to be transmitted by the terminal.
  • PSSCH-RSRP Reference Signal Received Power
  • Step 3 If the number of remaining resources in set A is less than 20% of the total number of resources, the terminal raises the PSSCH-RSRP threshold by 3dB, and repeats steps 1 to 2 until the number of remaining resources in set A is greater than the total number of resources 20% of it.
  • Step 4 The terminal performs sidelink Received Signal Strength Indicator (S-RSSI) detection on the remaining resources in set A, and sorts the remaining resources in set A according to the energy level, and sorts the resources with the lowest energy 20% (relative to the number of resources in set A) resources are put into set B.
  • S-RSSI Sidelink Received Signal Strength Indicator
  • Step 5 The terminal selects a resource from set B with a moderate probability for data transmission.
  • PSCCH301 used to transmit control information is included in PSSCH302 used to transmit data, which also means that PSCCH301 and PSSCH302 must be sent at the same time.
  • the current standard only supports the initial transmission of the current data block (Transport Block, TB) to reserve the retransmission of the current TB, the retransmission of the current TB reserves the retransmission of the current TB, and the initial transmission (or retransmission) of the previous TB. Reserve the initial transmission (or retransmission) of the current TB.
  • Transport Block TB
  • the current TB is TB2 and the previous TB is TB1.
  • the initial transmission 421 of TB2 is reserved for retransmission 422 and retransmission 423 of TB2
  • the retransmission 422 of TB2 is reserved for retransmission 423 of TB2
  • the initial transmission 411 of TB1 is reserved for the initial transmission 421 of TB2
  • the retransmission 412 of TB1 is reserved.
  • TB1 retransmission 413 reserves TB2 retransmission 423.
  • the terminal In NR-V2X, in the above-mentioned mode B, the terminal also needs to select resources by itself.
  • the resource selection mechanism is similar to the resource selection mechanism in LTE-V2X described above.
  • the terminal generates a service data packet at time n and needs to perform resource selection, and all resources in the resource selection window are taken as set A.
  • the resource selection window starts from n+T1 and ends at n+T2.
  • T1> The time for the terminal to prepare to send data and perform resource selection
  • the terminal performs resource monitoring from n-T0 to n, and the value range of T0 is [100, 1100] milliseconds. If the terminal hears the PSCCH, it measures the RSRP of the PSCCH or the RSRP of the PSSCH scheduled by the PSCCH. If the measured RSRP is greater than the RSRP threshold, it determines its reserved resources according to the resource reservation information in the control information transmitted in the PSCCH In the resource selection window, the corresponding resource is excluded from the set A.
  • the terminal randomly selects a number of resources from the set A as sending resources for its initial transmission and retransmission.
  • the above RSRP threshold is determined by the priority carried in the PSCCH monitored by the terminal and the priority of the data to be sent by the terminal.
  • the difference between the time domain position of the initial transmission resource selected by the terminal and the time domain position of the last retransmission resource needs to be less than or equal to W.
  • W is equal to 32 time slots.
  • the length of each time slot is related to the sub-carrier spacing. If the sub-carrier spacing is 15 kHz, the time slot length is 1 millisecond, and if the sub-carrier spacing is 30 kHz, the time slot length is 0.5 milliseconds.
  • resource preemption is supported in NR-V2X, that is, after the terminal eliminates resources, set A may include resource blocks reserved by low-priority terminals, and the terminal performs processing on the resource blocks reserved by low-priority terminals. seize.
  • resource preemption can be achieved by adjusting the RSRP threshold.
  • terminal 1 generates data for resource selection at time n, and terminal 1 determines resource selection windows from n+T1 to n+T2 and resource listening windows from n-T0 to n.
  • terminal 1 listens, terminal 2 sends PSCCH and PSSCH at time n-a and reserves resource x at time n+b.
  • terminal 1 listens to the PSCCH sent by terminal 2, it knows that the priority carried in the PSCCH of terminal 2 is lower than the priority of the data to be sent, thereby raising the RSRP threshold, so that the measured RSRP of the signal sent by terminal 2 The probability of being lower than the RSRP threshold increases.
  • the terminal 1 When the measured RSRP is lower than the RSRP threshold, the terminal 1 will not exclude the resource x reserved by the terminal 2. If the terminal 1 randomly selects the resource x reserved by the terminal 2 in the set A after the resource is excluded, the terminal 1 preempts the resource x. Conversely, if the terminal 1 detects that the priority carried in the PSCCH of the terminal 2 is higher than the priority of the data to be sent by itself, the RSRP threshold is lowered, so that the resources reserved by the terminal 2 are easier to be excluded, thereby avoiding conflicts with high-priority data. The terminal uses the same resource block.
  • NR-V2X supports continuous listening (re-evaluation) after the initial resource selection.
  • the terminal generates data at time n, determines the resource listening window and resource selection window of the resource for resource selection, and the terminal selects the initial transmission resource x at time n+a, as well as n+b and n+c Retransmission resources y and z at time. After n time, the terminal will continue to listen to the PSCCH. Before the time n+a, if the terminal discovers that resource x, resource y, or resource z is reserved by other terminals through continuous monitoring (that is, a resource conflict occurs), and the measured RSRP is higher than the RSRP threshold, the terminal will release the corresponding resource, and Reselect another piece of resource on the premise that the service delay requirement is met.
  • n+a because the terminal has sent PSCCH and PSSCH on resource x and reserved resources y and z, only the terminal discovers through continuous monitoring that a high-priority UE has preempted resource y or z, and RSRP Above the RSRP threshold, the terminal will release the resource y or z and reselect the resource.
  • the UE is supported to perform resource reselection after selecting the resource.
  • the UE continues to perform resource listening after selecting resources, which will increase the energy consumption of the UE.
  • this application proposes a partial sensing technical solution to save energy consumption of the UE.
  • FIG. 7 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 may 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 the data network is provided with a V2X application server (Application Server) required for a V2X service.
  • the system architecture also includes the 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 also includes: a radio access network (New Generation-Radio Access Network, NG-RAN) and four user equipments (ie, user equipment 1 to user equipment 4) shown by way of example, where each user equipment is V2X application (Application) is installed.
  • NG-RAN New Generation-Radio Access Network
  • user equipment 1 to user equipment 4 shown by way of example, where each user equipment is V2X application (Application) is installed.
  • the user equipment performs uplink transmission to the access network equipment.
  • the data network and the user plane function in the 5G core network are connected through the N6 reference point (Reference Point), the V2X application server is connected with the V2X application in the user equipment through the V1 reference point; the wireless access network is connected with the 5G core network
  • the AMF function and the UPF function in the connection the wireless access network is connected to the user equipment 1 and the user equipment 5 through the Uu reference point; the sideline transmission between multiple user equipments is carried out through the PC5 reference point, and the multiple V2X applications pass through V5 reference point connection.
  • the above-mentioned reference point may also be referred to as an "interface".
  • Fig. 8 shows a flowchart of a method for selecting a resource according to an exemplary embodiment of the present application.
  • the method may be executed by the user equipment in V2X as shown in FIG. 7.
  • the method includes:
  • Step 102 When the service arrives at time n, select the resource used to transmit the service and the reserved resource (retransmission resource) in the resource selection window;
  • the resource selection window is a window from time n+T 11 to time n+T 12 , the first time period from time n to time n+T 11 is greater than or equal to the processing delay of the first terminal, and time n to time n+ The second time period of T 12 is less than or equal to the service delay requirement range.
  • the first terminal will perform resource selection only when the resource selection conditions are met.
  • the way of resource selection can refer to the aforementioned introduction.
  • the selected resource is located in the time slot at time m.
  • two terminals communicate with each other in a way of side link.
  • the two terminals adopt the side link mode B, that is, the first terminal selects a resource from the resource pool for data transmission by itself.
  • the first terminal has a service to be transmitted, and the first terminal can select a resource in the resource selection window from time n+T 11 to time n+T 12 to select an initial transmission resource.
  • the first terminal uses the initial transmission resource to transmit the service to the second terminal for the first time.
  • Step 104 Determine a resource listening window, where the resource listening window includes a part of the time slot before the time slot m where the selected resource is located;
  • the resource listening window includes a part of time slots (but not all time slots) between time slot n and time slot m. Among them, time slot n is the time slot where the service arrives, and time slot m is the time slot where the selected resource is located.
  • each selected resource corresponds to its own time slot.
  • the selected resources include: initial transmission resource 1 and reserved retransmission resource 2.
  • the time slot where the initial transmission resource 1 is located is time slot m1
  • the time slot where the retransmission resource 2 is located is time slot m2
  • the resource listening window 1 corresponding to the first transmission resource 1 is determined according to the part of the time slot before the time slot m1
  • the retransmission The resource listening window 2 corresponding to the resource 2 is determined according to a part of the time slot before the time slot m2.
  • the last time slot of the resource listening window that is preliminarily determined is located in time slot m-T3 or after time slot m-T3, the last time slot of the resource listening window is corrected to time slot m-T3.
  • T3-1 where T3 is the time required for the first terminal to perform resource reselection.
  • Step 106 When the result of the resource listening window is that the selected resource conflicts with the reserved resource of the second terminal, resource reselection is performed on the selected resource.
  • the first terminal listens in the resource listening window, and when the result of the resource listening window is that the selected resource conflicts with the reserved resource of the second terminal, resource reselection is performed on the selected resource.
  • the possible sources of the aforementioned resource conflicts include:
  • the selected resource is preempted by the second terminal with higher priority
  • the second terminal After the first terminal selects the selected resource, the second terminal generates a burst aperiodic service and also reserves the selected resource.
  • the first terminal determines the reselection resource of the initial transmission resource in the reselection window.
  • the reselection window is the window from time n+t 1 +T 21 to time n+t 1 +T 22.
  • the reselection The window performs resource exclusion, and randomly selects a resource from the remaining candidate resources as the reselection resource of the initial transmission resource.
  • T 21 is greater than or equal to the processing delay of the terminal, and t 1 + T 22 is less than or equal to the required range of the service delay.
  • Time n+t 1 is the time when it is determined that the initial transmission resource conflicts.
  • t 1 is 100 milliseconds, and the terminal determines that the initial transmission resource conflicts at n+100 milliseconds; the processing delay of the terminal is 10 milliseconds, and T 21 is equal to the processing delay of the first terminal, which is also 10 milliseconds; The required range of delay is 1000 milliseconds, t 1 + T 22 is less than or equal to the required range of service delay, and T 22 is 900 milliseconds.
  • the reselection window is a window from time n+t 1 +10 to time n+t 1 +900.
  • the resource listening window determined by the first terminal only includes a part of the time slots before the time slot m where the selected resource is located, instead of all time slots, so resource reselection is being performed.
  • the time required for listening is reduced, the power consumption of the first terminal is saved, and the endurance of the first terminal is improved.
  • step 104 may be implemented as the following steps, as shown in FIG. 9:
  • Step 104a Determine the resource listening window according to the listening window parameters.
  • this step includes at least the following four implementation methods:
  • the listening window parameters include: the first parameter k;
  • the first terminal determines that the resource listening window includes: a part of the k time slots before the time slot m where the selected resource is located.
  • the first terminal determining that the resource listening window includes: the resource listening window is [m-k, m-T3).
  • T3 is the time required for the first terminal to perform resource reselection. That is, the resource listening window is from time slot m-k to time slot m-T3-1.
  • the first terminal determines the first parameter k, and the first terminal determines that the resource listening window is [m-k, m-T3).
  • T3 is the time required for the UE to perform resource reselection.
  • Method 2 The parameters of the listening window include: the bitmap and the time domain start position of the bitmap;
  • the first terminal determines that the resource listening window includes: at least one time slot before the time slot m where the selected resource is located, the at least one time slot is specified in the time domain by the bitmap and the time domain start position v of the bitmap, and the bitmap
  • the time slot indicated by the bit with the first value is the time slot in the resource listening window.
  • the time domain starting position of the bitmap is v, and optionally, v is equal to or greater than time n.
  • the bitmap includes several bits. When the value of the i-th bit is 1, it means that the v+i-th time slot belongs to the resource listening window; when the value of the i-th bit is 0, it means that the v+i-th time slot is not. Belongs to the resource listening window.
  • the value of the i-th bit when the value of the i-th bit is 0, it means that the v+i-th time slot belongs to the resource listening window; when the value of the i-th bit is 1, it means that the v+i-th time slot does not belong to the resource listening window. .
  • the first terminal determines the bitmap "111010101" and the time domain start position v of the bitmap, and the first terminal determines that the resource listening window is multiple time slots corresponding to bit 1.
  • the last time slot indicated by the bitmap and the start position of the time domain of the bitmap is located in the time slot m-T3 or after the time slot m-T3, the last time slot of the resource listening window is corrected This is the time slot m-T3-1; where T3 is the time for the first terminal to perform resource selection.
  • the listening window parameters include: a second parameter P1 and a third parameter P2;
  • the first terminal determines that the resource listening window includes: time slot m-P1 to time slot m-P2.
  • P1 and P2 are integers.
  • the first terminal determines the second parameter P1 and the third parameter P2, and the first terminal determines that the resource listening window is [m-P1, m-P2).
  • the last time slot of the resource listening window is revised to the time slot m-T3-1; where T3 is the first terminal for resource selection time.
  • the parameters of the listening window include: a fourth parameter u and a fifth parameter t;
  • the first terminal determines that the resource listening window includes: time slot u to time slot u+t, and time slot u to time slot u+t are located before time slot m where the selected resource is located.
  • u and t are integers.
  • the first terminal determines the fourth parameter u and the fifth parameter t, and the first terminal determines that the resource listening window is [u, u+t).
  • the resource listening window includes: time slot u to time slot m-T3-1; in time slot u+
  • the resource listening window includes: time slot u to time slot u+t.
  • the time slot u to the time slot u+t are located before the time slot m where the selected resource is located, and T3 is the time for the first terminal to select the resource.
  • the foregoing method further includes:
  • Step 101a Receive configuration signaling, which is used to configure listening window parameters.
  • the first terminal receives configuration signaling sent by other devices.
  • the configuration signaling is used to configure any one of the aforementioned four listening window parameters.
  • the other device is a network device (or called a network side device, an access network device), and the network device sends the first configuration signaling to the first terminal.
  • the first terminal receives the first configuration signaling sent by the network device, the first configuration signaling includes: Downlink Control Information (DCI); or, Radio Resource Control (RRC) signaling; or, system The information block (System Information Block, SIB) message is shown in Figure 15.
  • DCI Downlink Control Information
  • RRC Radio Resource Control
  • SIB System Information Block
  • the DCI is the control information transmitted by the eNB/gNB to the UE on the physical downlink control channel (PDCCH).
  • RRC signaling is a method for the eNB/gNB to configure the UE when the UE is in the RRC connected state.
  • the SIB message is the system information obtained when the UE initially accesses the network, and is generally sent periodically by the eNB/gNB. After the UE has accessed the network, it can still receive some SIB messages issued by the network.
  • vehicle formation is one of the newly introduced scenes in NR-V2X. That is, several vehicles form a convoy and travel at the same speed. In the scene of vehicle formation, the leader 11 at the front of the team or the chaser 12 at the rear of the team often plays the role of the leader of the team, and performs tasks related to configuration, resource selection, and resource allocation to the vehicles in the team. In other scenarios of NR-V2X, there will be similar situations where several vehicles form a group.
  • NR V2X also introduced 2-stage side-line control information (2 stage SCI).
  • 2-stage SCI the first side-line control information that stores resource snooping related information is transmitted in the PSCCH, and the second side-line control information that stores the remaining information is transmitted in the PSSCH.
  • the third terminal as the group head sends the second configuration signaling to the first terminal, and the first terminal receives the signal sent by the third terminal as the group head.
  • the second configuration signaling includes: the first side line control information; or, the second side line control information; or, the PC5-RRC signaling; where the first side line control information is transmitted on the PSCCH
  • the second side row control information is the side row control information transmitted on the PSSCH, as shown in Figure 17.
  • the configuration signaling is used to configure the first terminal alone, or the configuration signaling is used to configure multiple terminals that use the same resource pool. Specifically, the configuration signaling is used to configure the listening window parameters for the first terminal; or, the configuration signaling is used to configure the listening window parameters for multiple terminals that use the same resource pool.
  • the terminal may also receive pre-configuration information, and the pre-configuration information is used to configure listening window parameters.
  • Pre-configuration refers to the condition that some configurations are written in advance when the terminal leaves the factory.
  • Pre-configuration may also mean that the UE receives configuration information from a network device within the coverage area, and when the UE moves outside the coverage area, the previous configuration information is still used.
  • the foregoing method further includes:
  • Step 101b Receive configuration signaling, which is used to configure whether to perform resource reselection after selecting the selected resource.
  • the first terminal receives configuration signaling sent by other devices.
  • the configuration signaling is used to configure whether to perform resource reselection after selecting the selected resource.
  • the other device is a network device (or called a network side device, an access network device), and the network device sends the first configuration signaling to the first terminal.
  • the first terminal receives the first configuration signaling sent by the network device, where the first configuration signaling includes: DCI; or, RRC signaling; or, SIB message.
  • the third terminal as the group head sends the second configuration signaling to the first terminal, and the first terminal receives the second configuration signaling as the group head
  • the second configuration signaling sent by the third terminal of the second configuration signaling includes: the first side line control information; or, the second side line control information; or, the PC5-RRC signaling; where the first side line control information
  • the information is the side control information transmitted on the PSCCH
  • the second side control information is the side control information transmitted on the PSSCH.
  • the configuration signaling is used to configure the first terminal alone, or the configuration signaling is used to configure multiple terminals that use the same resource pool. Specifically, the configuration signaling is used to configure whether to perform resource reselection after selecting the selected resource for the first terminal; or, the configuration signaling is used to configure whether to perform resource reselection after selecting the selected resource for multiple terminals using the same resource pool. For resource reselection, the multiple terminals include the first terminal.
  • the terminal may also receive pre-configuration information, which is used to configure whether to perform resource reselection after selecting the selected resource.
  • the “configuration signaling” shown in Figure 14 and Figure 18 can be the same signaling, or That is, the configuration signaling is not only used to configure resource reselection after the selected resource is selected, but also used to configure listening window parameters. However, it is not excluded that in some other embodiments, the "configuration signaling" in FIG. 14 and FIG. 18 may be two different signalings.
  • the terminal can decide by itself whether to perform a resource reselection operation after selecting a resource and determine the relevant parameters by itself. For example, the terminal may decide whether to perform resource reselection according to its own remaining power or measuring channel occupancy ratio (Channel Busy Ratio, CBR). When its own remaining power is high or the measured CBR is high, a resource reselection operation is performed. Otherwise, the resource reselection operation is not performed.
  • the “resource reselection operation” here refers to determining the resource listening window to listen, and according to the listening result of the resource listening window, when the selected resource conflicts with the reserved resource of the second terminal, the selected resource Resource reselection. If the resource reselection operation is not performed, there is no need to determine the resource listening window nor to listen.
  • Fig. 19 shows a block diagram of a resource selection device shown in an exemplary embodiment of the present application.
  • the device is applied to the first terminal, or the device is implemented as the first terminal, and the device includes:
  • the determining module 1920 is configured to determine a resource listening window, where the resource listening window includes a part of the time slot before the time slot m where the selected resource is located;
  • the reselection module 1940 is configured to perform resource reselection on the selected resource when a resource conflict occurs between the selected resource and the reserved resource of the second terminal when the monitoring result of the resource monitoring window is.
  • the determining module 1920 is configured to determine the resource listening window according to a listening window parameter.
  • the listening window parameters include: a first parameter k;
  • the determining module 1920 is configured to determine that the resource listening window includes: a part of the k time slots before the time slot m where the selected resource is located.
  • the listening window parameters include: a bitmap and a time domain start position of the bitmap;
  • the determining module 1920 is configured to determine the resource listening window including: at least one time slot before the time slot m where the selected resource is located, and the at least one time slot is determined by the bitmap and the bitmap The time domain start position is specified in the time domain, and the time slot indicated by the bit with the first value in the bitmap is the time slot in the resource listening window.
  • the listening window parameters include: a second parameter P1 and a third parameter P2;
  • the determining module 1920 is configured to determine the resource listening window including: timeslot m-P1 to timeslot m-P2.
  • the listening window parameters include: a fourth parameter u and a fifth parameter t;
  • the determining module 1920 is configured to determine the resource listening window including: time slot u to time slot u+t, and the time slot u to time slot u+t are located before the time slot m where the selected resource is located.
  • the device further includes: a correction module 1980, configured to locate the last time slot of the resource listening window determined by the determining module 1920 in the time slot m-T3 or in the time slot m-T3. After m-T3, correct the last time slot of the resource listening window to time slot m-T3-1;
  • T3 is the time for the first terminal to perform resource selection.
  • the receiving module 1960 is configured to receive configuration signaling, where the configuration signaling is used to configure the listening window parameters.
  • the receiving module 1960 is configured to receive first configuration signaling sent by a network device, where the first configuration signaling includes: downlink control information DCI; or, radio resource control RRC signaling ; Or, the system information block SIB message.
  • the receiving module 1960 is configured to receive a second configuration signaling sent by a third terminal as a group header, and the second configuration signaling includes: first side line control information; or , The second side line control information; or, PC5-RRC signaling;
  • the first side row control information is side row control information transmitted on the PSCCH
  • the second side row control information is side row control information transmitted on the PSSCH.
  • the configuration signaling is used to configure the listening window parameters for the first terminal; or, the configuration signaling is used to configure all terminals for multiple terminals that use the same resource pool.
  • the listening window parameter the multiple terminals include the first terminal.
  • the device further includes: a receiving module 1960, configured to receive pre-configuration information, where the pre-configuration information is used to configure the listening window parameters.
  • the apparatus further includes: a receiving module 1960, configured to receive configuration signaling, where the configuration signaling is used to configure whether to perform the resource reselection after selecting the selected resource.
  • the receiving module 1960 is configured to receive first configuration signaling sent by a network device, where the first configuration signaling includes: downlink control information DCI; or, radio resource control RRC signaling ; Or, the system information block SIB message.
  • the receiving module 1960 is configured to receive a second configuration signaling sent by a third terminal as a group header, and the second configuration signaling includes: first side line control information; or , The second side line control information; or, PC5-RRC signaling;
  • the first side row control information is side row control information transmitted on the PSCCH
  • the second side row control information is side row control information transmitted on the PSSCH.
  • the configuration signaling is used to configure to the first terminal whether to perform the resource reselection after selecting the selected resource; or, the configuration signaling is used to Configure whether to perform the resource reselection after selecting the selected resource to multiple terminals using the same resource pool, and the multiple terminals include the first terminal.
  • the device further includes: a receiving module 1960, configured to receive pre-configuration information, where the pre-configuration information is used to configure whether the first terminal performs all operations after selecting the selected resource. Re-selection of said resources.
  • FIG. 20 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, and the communication component may be a communication chip.
  • the memory 104 is connected to the processor 101 through a bus 105.
  • the memory 104 may be used to store at least one instruction, and the processor 101 is used to execute the at least one instruction to implement each step in the foregoing method embodiment.
  • the memory 104 can be implemented by any type of volatile or non-volatile storage device or a combination thereof.
  • the volatile or non-volatile storage device includes, but is not limited to: magnetic disks or optical disks, electrically erasable and programmable Read Only Memory (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 (PROM).
  • a computer-readable storage medium stores at least one instruction, at least one program, code set, or instruction set, and the at least one instruction, the At least one program, the code set, or the instruction set is loaded and executed by the processor to implement the resource selection method executed by the terminal provided in the foregoing method embodiments.
  • the program can be stored in a computer-readable storage medium.
  • the storage medium mentioned can be a read-only memory, a magnetic disk or an optical disk, etc.

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Abstract

本申请公开了一种资源选择方法的方法、装置、终端和介质，涉及无线通信领域，该方法包括：确定资源侦听窗，所述资源侦听窗包括位于已选资源所在时隙m之前的一部分时隙；当所述资源侦听窗的侦听结果为所述已选资源与第二终端的预留资源发生资源冲突时，对所述已选资源进行资源重选。本申请中确定的资源侦听窗仅包括位于已选资源所在时隙m之前的一部分时隙，而非全部时隙，因此在进行资源重选的侦听过程中，减少了需要侦听的时长，节省了第一终端的用电消耗。

Description

资源选择方法、装置、终端和介质 技术领域
本申请涉及无线通信领域，特别涉及一种资源选择方法、装置、终端和介质。
背景技术
为了实现车联网(Vehicle to everything，V2X)系统中的终端与终端之间的直接通信，引入了侧行链路(SideLink，SL)传输方式。
在SL的一种传输模式中，终端需要在资源池中进行资源选择。终端确定资源选择窗和资源侦听窗，根据资源侦听窗的侦听结果，对资源选择窗内的资源进行排除，得到待传输的业务的候选资源(排除后的资源)。终端在候选资源中随机地选择资源向另一终端进行业务的传输，包括该业务的初传和重传。
发明内容
本申请实施例提供了一种资源选择方法、装置、终端和介质。所述技术方案如下。
根据本申请的一个方面，提供了一种资源选择方法，应用于第一终端中，所述方法包括：
确定资源侦听窗，所述资源侦听窗包括位于已选资源所在时隙m之前的一部分时隙；
当所述资源侦听窗的侦听结果为所述已选资源与第二终端的预留资源发生资源冲突时，对所述已选资源进行资源重选。
根据本申请的一个方面，提供了一种资源选择装置，应用于第一终端中，所述装置包括：
确定模块，用于确定资源侦听窗，所述资源侦听窗包括位于已选资源所在时隙m之前的一部分时隙；
重选模块，用于当所述资源侦听窗的侦听结果为所述已选资源与第二终端的预留资源发生资源冲突时，对所述已选资源进行资源重选。
根据本申请的一个方面，提供了一种资源选择方法的装置，所述装置包括：
确定模块，用于确定资源侦听窗，所述资源侦听窗包括位于已选资源所在时隙m之前的一部分时隙；
重选模块，用于当所述资源侦听窗的侦听结果为所述已选资源与第二终端的预留资源发生资源冲突时，对所述已选资源进行资源重选。
根据本申请的一个方面，提供了一种终端，所述终端包括：处理器；与所述处理器相连的收发器；用于存储所述处理器的可执行指令的存储器；其中，所述处理器被配置为加载并执行所述可执行指令以实现如上述方面所述的资源 选择方法。
根据本申请的一个方面，提供了一种计算机可读存储介质，所述可读存储介质中存储有可执行指令，所述可执行指令由所述处理器加载并执行以实现如上述方面所述的资源选择方法。
本申请实施例提供的技术方案至少包括如下有益效果：
终端确定的资源侦听窗仅包括位于已选资源所在时隙m之前的一部分时隙，而非全部时隙，因此在进行资源重选的侦听过程中，减少了需要侦听的时长，节省了终端的用电消耗，提高了终端的续航能力。
附图说明
为了更清楚地说明本申请实施例中的技术方案，下面将对实施例描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本申请的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。
图1是本申请一个相关技术中侧行链路的传输模式的示意图；
图2是本申请一个相关技术中在LTE-V2X中选取资源的示意图；
图3是本申请一个相关技术中的NR-V2X的物理层结构的框图；
图4是本申请一个相关技术中TB的传输的示意图；
图5是本申请一个相关技术中资源选择方法的示意图；
图6是本申请一个相关技术中资源选择方法的示意图；
图7是本申请一个示例性实施例提供的支持侧行传输的通信系统的框图；
图8是本申请一个示例性实施例提供的资源选择方法的示意图；
图9是本申请一个示例性实施例提供的资源选择方法的示意图；
图10是本申请一个示例性实施例提供的资源侦听窗的时频示意图；
图11是本申请一个示例性实施例提供的资源侦听窗的时频示意图；
图12是本申请一个示例性实施例提供的资源侦听窗的时频示意图；
图13是本申请一个示例性实施例提供的资源侦听窗的时频示意图；
图14是本申请一个示例性实施例提供的资源选择方法的示意图；
图15是本申请一个示例性实施例提供的由网络设备进行配置的示意图；
图16是本申请一个示例性实施例提供的车辆组队的示意图；
图17是本申请一个示例性实施例提供的由作为组头的第三终端进行配置的示意图；
图18是本申请一个示例性实施例提供的资源选择方法的示意图；
图19是本申请一个示例性实施例提供的资源选择装置的结构框图；
图20是本申请一个示例性实施例提供的终端的结构示意图。
具体实施方式
为使本申请的目的、技术方案和优点更加清楚，下面将结合附图对本申请实施方式作进一步地详细描述。
首先，对本申请实施例中涉及的名词进行简单介绍：
车联网(Vehicle to everything，V2X)：是未来智能交通运输系统的关键技术，主要研究基于3GPP通信协议的车辆数据传输方案。V2X通信包括车与车(Vehicle to Vehicle，V2V)通信、车与路侧基础设施(Vehicle to Infrastructure，V2I)通信以及车与行人(Vehicle to People，V2P)通信。V2X应用将改善驾驶安全性、减少拥堵和车辆能耗、提高交通效率等。
侧行链路(Side Link，SL)传输：是一种设备到设备的通信方式，具有较高的频谱效率和较低的传输时延。在3GPP中定义了两种侧行链路的传输模式：模式A和模式B。如图1中的(a)所示，模式A中，终端的传输资源是由基站通过下行链路分配的，终端根据基站分配的资源在侧行链路上进行数据的发送；基站可以为终端分配单次传输的资源，也可以为终端分配半静态传输的资源。如图1中的(b)所示，模式B中，终端在资源池中自行选取一个资源进行数据的传输。具体的，终端可以通过侦听的方式在资源池中选取传输资源，或者通过随机选取的方式在资源池中选取传输资源。
在侧行链路的传输模式的模式B中，终端可以通过侦听的方式在资源池中选取传输资源。下面，对LTE-V2X和NR-V2X中的资源选取方法做出说明：
1)LTE-V2X中的资源选取方法
当在时刻n有新的数据包到达(也即业务到达)，需要进行资源选取，终端会根据过去1秒中的侦听结果，在[n+T1,n+T2]毫秒内进行资源选取，其中T1<＝4；20<＝T2<＝100,并且T1的选取应该大于终端的处理时延，T2的选取需要在业务的时延要求范围内。例如，如果业务的时延要求是50ms，则20<＝T2<＝50，业务的时延要求是100ms，则20<＝T2<＝100。
示例性的，如图2所示，在时刻n有新的数据包到达，需要进行资源选取，资源侦听窗为[n-1000,n]。业务的时延要求是100ms，资源选择窗为[n+4,n+100]。
终端在资源选择窗内进行资源选取的过程如下(具体的资源选取过程可以参照3GPP TS36.213中的操作步骤，此处列出了几个主要的资源选取步骤)：
终端将资源选择窗内所有可用的资源作为一个集合A，终端对集合A中的资源进行排除操作。
步骤一：如果终端在资源侦听窗内某些子帧(subframe)发送数据，没有进行侦听，则这些子帧在资源选择窗内对应的子帧上的资源被排除掉。
步骤二：如果终端在资源侦听窗内检测到物理侧行控制信道(Physical Sidelink Control Channel，PSCCH)，测量该PSCCH调度的物理侧行共享信道(Physical Sidelink Shared Channel，PSSCH)的参考信号接收功率(Reference Signal Received Power，RSRP)，如果测量的PSSCH-RSRP高于PSSCH-RSRP门限，并且根据该PSCCH中传输的控制信息中的预留信息确定另一终端预留的传输资源在终端的资源选择窗内，则终端在集合A中排除掉该资源。其中，PSSCH-RSRP门限的选取是由检测到的PSCCH中携带的优先级信息和终端待传输数据的优先级确定的。
步骤三：如果集合A中剩余的资源个数小于总资源个数的20％，终端提升PSSCH-RSRP的门限3dB，并且重复步骤一至步骤二，直到集合A中剩余的资源个数大于总资源数的20％。
步骤四：终端对集合A中剩余的资源进行侧行接收信号场强指示(Sidelink Received Signal Strength Indicator，S-RSSI)检测，并且按照能量高低对集合A中剩余的资源进行排序，把能量最低的20％(相对于集合A中的资源个数)资源放入集合B。
步骤五：终端从集合B中等概率的选取一个资源进行数据传输。
2)NR-V2X中侦听的资源选取方法
在NR-V2X中，需要支持自动驾驶，因此对车辆之间数据交互提出了更高的要求，如更高的吞吐量、更低的时延、更高的可靠性、更大的覆盖范围、更灵活的资源分配等。
NR-V2X的物理层结构如图3所示，用于传输控制信息的PSCCH301是包含在用于传输数据的PSSCH302中的，这也意味着PSCCH301与PSSCH302必须同时发送。
目前标准中只支持当前数据块(Transport Block，TB)的初传预留当前TB的重传，当前TB的重传预留当前TB的重传，以及上一个TB的初传(或重传)预留当前TB的初传(或重传)。
如图4所示，假设当前TB为TB2,上一个TB为TB1。TB2的初传421预留TB2的重传422和重传423,TB2的重传422预留TB2的重传423，TB1的初传411预留TB2的初传421，TB1的重传412预留TB2的重传422，TB1的重传413预留TB2的重传423。
NR-V2X中，在上述模式B下，终端也需要自行选择资源。其进行资源选择的机制与上述LTE-V2X中的资源选择机制类似。
终端在n时刻产生业务的数据包，需要进行资源选择，将资源选择窗内所有的资源作为集合A。资源选择窗从n+T1开始，到n+T2结束。T1＞＝终端准备发送数据以及进行资源选择的时间，T2min<＝T2<＝业务的时延要求范围。T2min的取值为{1,5,10,20}*2 μ个时隙(slot)，其中μ＝0，1，2，3对应于子载波间隔是15，30，60，120kHz的情况。
如图5所示，终端在n-T0到n时刻进行资源侦听，T0的取值范围是[100,1100]毫秒。如果终端侦听到PSCCH，测量该PSCCH的RSRP或者该PSCCH调度的PSSCH的RSRP，如果测量的RSRP大于RSRP阈值，并且根据该PSCCH中传输的控制信息中的资源预留信息确定其预留的资源在资源选择窗内，则从集合A中排除对应资源。
进行资源排除后，终端从集合A中随机选择若干资源，作为其初传以及重传的发送资源。上述RSRP阈值是由终端侦听到的PSCCH中携带的优先级和终端待发送数据的优先级决定的。此外，终端选择的初传资源的时域位置与最后一次重传资源的时域位置相差需小于等于W。在NR-V2X中，W等于32个时隙。每个时隙的长度与子载波间隔有关，如果子载波间隔是15kHz则时隙长度是1毫秒，如果子载波间隔是30kHz则时隙长度是0.5毫秒。
需要注意的是，NR-V2X中支持资源抢占，即终端进行资源排除后，集合A中可能会包含低优先级终端所预留的资源块，终端对低优先级终端所预留的资源块进行抢占。例如，资源抢占可以通过调整RSRP阈值实现。
假设在图5中，终端1在时刻n产生数据进行资源选择，终端1确定了n+T1到n+T2的资源选择窗以及n-T0到n的资源侦听窗。在资源侦听窗内，终端1侦听到，终端2在n-a时刻发送PSCCH和PSSCH并预留n+b时刻的资源x。终端1在侦听到终端2发送的PSCCH后，得知终端2的PSCCH中携带的优先级比自身待发送数据的优先级低，从而提升了RSRP阈值，使得测量到的终端2发送信号的RSRP低于RSRP阈值的概率增加，当测量到的RSRP低于RSRP阈值时，终端1不会排除终端2所预留的资源x。如果终端1在资源排除过后的集合A中随机选到了终端2预留的资源x，则终端1抢占资源x。反之，如果终端1检测到终端2的PSCCH中携带的优先级比自身待发送数据的优先级高，则降低RSRP阈值，使得终端2预留的资源更容易被排除，从而避免与高优先级的终端使用同一资源块。
此外，NR-V2X支持在初始选择资源后继续进行持续侦听(re-evaluation)。
如图6所示，终端在n时刻产生数据，确定资源的资源侦听窗与资源选择窗进行资源选择，并且终端选择了n+a时刻的初传资源x，以及n+b和n+c时刻的重传资源y和z。在n时刻后，终端仍然会持续侦听PSCCH。在n+a时刻以前，如果终端通过持续侦听发现资源x或资源y或资源z被其他终端预留(即发生资源冲突)，并且测量的RSRP高于RSRP阈值，终端会释放对应资源，并在满足业务时延要求的前提下重选另一块资源。在n+a时刻后，因为终端已经在资源x上发送了PSCCH和PSSCH并预留了资源y和z，只有终端通过持续侦听发现有高优先级的UE抢占了资源y或z，并且RSRP高于RSRP阈值，终端才会释放资源y或z，并重选资源。
根据上述内容可知，在NR系统中，支持UE在选择资源后进行资源重选。然而，UE在选择资源后还持续进行资源侦听会增加UE的能耗。为此，本申请提出了部分侦听(partial sensing)的技术方案，以节约UE的能耗。
图7示出了本申请一个示意性实施例提供的支持侧行传输的通信系统的框图。该通信系统可以是非漫游5G系统构架(Non-roaming 5G system architecture)的示意图，该系统构架可以应用于使用D2D技术的车联网(Vehicle to everything，V2X)业务。
该系统架构包括数据网络(Data Network，DN)，该数据网络中设置有V2X业务所需的V2X应用服务器(Application Server)。该系统构架还包括5G核心网，5G核心网的网络功能包括：统一数据管理(Unified Data Management，UDM)、策略控制功能(Policy Control Function，PCF)、网络开放功能(Network Exposure Function，NEF)、应用功能(Application Function，AF)、统一数据存储(Unified Data Repository，UDR)、接入和移动性管理功能(Access and Mobility Management Function，AMF)、会话管理功能(Session Management Function，SMF)以及用户面功能(User Plane Function，UPF)。
该系统构架还包括：无线接入网(New Generation-Radio Access Network，NG-RAN)以及示例性示出的4个用户设备(即用户设备1至用户设备4)，其中，每个用户设备均设置有V2X应用(Application)。无线接入网中设置有一个或多个接入网设备，比如基站(gNB)。用户设备向接入网设备进行上行传输。
该系统构架中，数据网络与5G核心网中的用户面功能通过N6参考点(Reference Point)连接，V2X应用服务器与用户设备中的V2X应用通过V1参考点连接；无线接入网与5G核心网中的AMF功能以及UPF功能连接，无线接入网分别通过Uu参考点与用户设备1以及用户设备5连接；多个用户设备之间通过PC5参考点进行侧行传输，多个V2X应用之间通过V5参考点连接。上述参考点也可称为“接口”。
图8示出了本申请一个示例性实施例提供的资源选择方法的方法的流程图。该方法可以由如图7所示的V2X中的用户设备来执行，该用户设备在执行时是作为发送业务的第一终端，该方法包括：
步骤102，在时刻n到达业务时，在资源选择窗中选择用于传输该业务的资源以及预留资源(重传资源)；
其中，资源选择窗是时刻n+T 11至时刻n+T 12的窗口，时刻n至时刻n+T 11的第一时间段大于或等于第一终端的处理时延，时刻n至时刻n+T 12的第二时间段小于或等于业务的时延要求范围。
可选的，在资源选择窗内存在多个用来传输业务的资源，第一终端在满足资源选择条件的情况下，才会进行资源选择。资源选择的方式可以参考前述介绍。示例性的，已选资源位于时刻m的时隙上。
在车联网系统中，两个终端之间采用侧行链路的方式进行通信。具体的，两个终端采用侧行链路的模式B，即第一终端在资源池中自行选取一个资源进行数据的传输。在时刻n，第一终端存在待传输的业务，第一终端可以在处于时刻n+T 11至时刻n+T 12的资源选择窗中进行资源选取，选择一个初传资源。第一终端使用该初传资源，第一次向第二终端传输该业务。
步骤104，确定资源侦听窗，资源侦听窗包括位于已选资源所在时隙m之前的一部分时隙；
在确定已选资源后，第一终端还需要持续侦听已选资源是否与其他终端的预留资源发生冲突。但为了减少侦听时长，第一终端确定资源侦听窗。该资源侦听窗包括位于时隙n至时隙m之间的一部分时隙(而非全部时隙)。其中，时隙n是业务到达的时隙，时隙m是已选资源所在时隙。
可选地，已选资源可能为至少两个，每个已选资源对应有各自的所在时隙。比如，已选资源包括：初传资源1和预留的重传资源2。初传资源1所在时隙为时隙m1，重传资源2所在时隙为时隙m2，则初传资源1对应的资源侦听窗1根据时隙m1之前的一部分时隙来确定，重传资源2对应的资源侦听窗2根据时隙m2之前的一部分时隙来确定。
可选地，若初步确定出的资源侦听窗的最后一个时隙位于时隙m-T3或在时隙m-T3之后时，将资源侦听窗的最后一个时隙修正为时隙m-T3-1，其中，T3 为第一终端进行资源重选所需要的时间。
步骤106，当资源侦听窗的侦听结果为已选资源与第二终端的预留资源发生资源冲突时，对已选资源进行资源重选。
第一终端在资源侦听窗中进行侦听，当资源侦听窗的侦听结果为已选资源与第二终端的预留资源发生资源冲突时，对已选资源进行资源重选。
上述资源冲突的可能来源包括：
1、已选资源被具有更高优先级的第二终端所抢占；
2、在第一终端选择已选资源后，第二终端产生了突发性的非周期性业务，也预留了该已选资源。
以发生冲突的已选资源为初传资源(重传资源类似)为例，第一终端在重新选择窗中确定初传资源的重选资源。
其中，重新选择窗是时刻n+t 1+T 21至时刻n+t 1+T 22的窗口，根据上一步确定的资源侦听窗中已侦听的时隙的侦听结果，对重新选择窗进行资源排除，在剩余候选资源中随机选择一个资源作为初传资源的重选资源。
可选的，T 21大于或等于终端的处理时延，t 1+T 22小于或等于业务的时延要求范围。时刻n+t 1是确定初传资源发生冲突的时刻。
示例性的，t 1为100毫秒，终端在n+100毫秒时确定初传资源发生冲突；终端的处理时延为10毫秒，T 21等于第一终端的处理时延，也为10毫秒；业务的时延要求范围为1000毫秒，t 1+T 22小于或等于业务的时延要求范围，T 22为900毫秒。重新选择窗是时刻n+t 1+10至时刻n+t 1+900的窗口。
综上所述，本实施例提供的方法，由第一终端确定的资源侦听窗仅包括位于已选资源所在时隙m之前的一部分时隙，而非全部时隙，因此在进行资源重选的侦听过程中，减少了需要侦听的时长，节省了第一终端的用电消耗，提高了第一终端的续航能力。
在基于图8的可选实施例中，步骤104可实现为如下步骤，如图9所示：
步骤104a，根据侦听窗口参数确定资源侦听窗。
第一终端根据侦听窗口参数的类型不同，本步骤至少包括如下四种实现方式：
方式一，侦听窗口参数包括：第一参数k；
第一终端确定资源侦听窗包括：已选资源所在时隙m之前的k个时隙中的一部分时隙。
示例性的，第一终端确定所述资源侦听窗包括：资源侦听窗为[m-k，m-T3)。其中，T3为第一终端进行资源重选所需的时间。也即，资源侦听窗为时隙m-k至时隙m-T3-1。
如图10所示，通过其他设备配置或预配置或UE实现。第一终端确定第一参数k，则第一终端确定资源侦听窗为[m-k，m-T3)。其中，T3为UE进行资源重选所需的时间。
方式二，侦听窗口参数包括：位图以及位图的时域起始位置；
第一终端确定资源侦听窗包括：已选资源所在时隙m之前的至少一个时隙， 至少一个时隙由位图以及位图的时域起始位置v在时域上指定，位图中具有第一取值的比特所指示的时隙是资源侦听窗中的时隙。其中，位图的时域起始位置为v，可选地，v等于或大于时刻n。位图包括若干个比特，第i个比特取值为1时，代表第v+i个时隙属于资源侦听窗；第i个比特取值为0时，代表第v+i个时隙不属于资源侦听窗。或者，第i个比特取值为0时，代表第v+i个时隙属于资源侦听窗；第i个比特取值为1时，代表第v+i个时隙不属于资源侦听窗。
如图11所示，通过其他设备配置或预配置或UE实现。第一终端确定位图“111010101”以及位图的时域起始位置v，则第一终端确定资源侦听窗为比特1所对应的多个时隙。
示例性的，当位图以及位图的时域起始位置所指示的最后一个时隙位于时隙m-T3或在时隙m-T3之后时，将资源侦听窗的最后一个时隙修正为时隙m-T3-1；其中，T3为第一终端进行资源选择的时间。
方式三，侦听窗口参数包括：第二参数P1和第三参数P2；
第一终端确定资源侦听窗包括：时隙m-P1至时隙m-P2。P1和P2为整数。
如图12所示，通过其他设备配置或预配置或UE实现。第一终端确定第二参数P1和第三参数P2，则第一终端确定资源侦听窗为[m-P1，m-P2)。
示例性的，时隙m-P2晚于或等于时隙m-T3时，将资源侦听窗的最后一个时隙修正为时隙m-T3-1；其中，T3为第一终端进行资源选择的时间。
方式四，侦听窗口参数包括：第四参数u和第五参数t；
第一终端确定资源侦听窗包括：时隙u至时隙u+t，时隙u至时隙u+t位于已选资源所在时隙m之前。u和t为整数。
如图13所示，通过其他设备配置或预配置或UE实现。第一终端确定第四参数u和第五参数t，则第一终端确定资源侦听窗为[u，u+t)。
可选地，在时隙u+t等于时隙m-T3或在时隙m-T3之后时，确定资源侦听窗包括：时隙u至时隙m-T3-1；在时隙u+t在时隙m-T3之前时，确定资源侦听窗包括：时隙u至时隙u+t。其中，时隙u至时隙u+t位于已选资源所在时隙m之前，T3为第一终端进行资源选择的时间。
在基于图8的可选实施例中，如图14所示，上述方法还包括：
步骤101a，接收配置信令，配置信令用于配置侦听窗口参数。
第一终端接收其他设备发送的配置信令。该配置信令用于配置上述四种侦听窗口参数中的任意一种。
在一个示例中，其他设备是网络设备(或称网络侧设备，接入网设备)，网络设备向第一终端发送第一配置信令。第一终端接收网络设备发送的第一配置信令，第一配置信令包括：下行控制信息(Downlink Control Information，DCI)；或，无线资源控制(Radio Resource Control，RRC)信令；或，系统信息块(System Information Block，SIB)消息，如图15所示。
以网络设备是演进型基站(eNB)或5G基站(gNB)为例，DCI是eNB/gNB在物理下行控制信道(PDCCH)上传输给UE的控制信息。RRC信令是UE处于RRC连接状态时，eNB/gNB对UE进行配置的一种方法。SIB消息是UE初始接入网络 时获取到的系统信息，一般情况下由eNB/gNB周期性发送。当UE已经接入网络后，仍然可以收到网络下发的部分SIB消息。
在另一个示例中，如图16所示，车辆组队是NR-V2X中新引入的场景之一。也即若干辆车组成车队，以相同的速度行进。在车辆组队的场景下，位于队伍最前方的头车11或位于队伍最后方的尾车12常常扮演组头的角色，对组内的车辆进行有关配置、资源选择、资源分配的工作。在NR-V2X的其它场景下，也会存在类似的若干个车辆组成一组的情况。此外，NR V2X中还引入了2阶段侧行控制信息(2 stage SCI)。在示例性的2阶段SCI中，存储资源侦听相关信息的第一侧行控制信息在PSCCH中传输，存储剩余信息的第二侧行控制信息在PSSCH中传输。
以第一终端为组内终端，第三终端为组头终端为例，作为组头的第三终端向第一终端发送第二配置信令，第一终端接收作为组头的第三终端发送的第二配置信令，第二配置信令包括：第一侧行控制信息；或，第二侧行控制信息；或，PC5-RRC信令；其中，第一侧行控制信息是在PSCCH上传输的侧行控制信息，第二侧行控制信息是在PSSCH上传输的侧行控制信息，如图17所示。
在基于图14的可选实施例中，配置信令用于单独向第一终端进行配置，或者，配置信令用于向使用同一个资源池的多个终端进行配置。具体地，配置信令用于向第一终端配置侦听窗口参数；或，配置信令用于向使用同一资源池的多个终端配置侦听窗口参数。
作为与图14并列的实施例，终端也可以接收预配置信息，预配置信息用于配置侦听窗口参数。预配置是指在终端出厂时，预先写入一些配置的情况。预配置也可以指，UE在覆盖范围内接收到来自网络设备的配置信息，当UE移动到覆盖范围外时，仍然使用之前的配置信息。
在基于图8的可选实施例中，如图18所示，上述方法还包括：
步骤101b，接收配置信令，配置信令用于配置是否在选择已选资源后进行资源重选。
第一终端接收其他设备发送的配置信令。配置信令用于配置是否在选择已选资源后进行资源重选。
在一个示例中，其他设备是网络设备(或称网络侧设备，接入网设备)，网络设备向第一终端发送第一配置信令。第一终端接收网络设备发送的第一配置信令，第一配置信令包括：DCI；或，RRC信令；或，SIB消息。
在另一个示例中，以第一终端为组内终端，第三终端为组头终端为例，作为组头的第三终端向第一终端发送第二配置信令，第一终端接收作为组头的第三终端发送的第二配置信令，第二配置信令包括：第一侧行控制信息；或，第二侧行控制信息；或，PC5-RRC信令；其中，第一侧行控制信息是在PSCCH上传输的侧行控制信息，第二侧行控制信息是在PSSCH上传输的侧行控制信息。
在基于图18的可选实施例中，配置信令用于单独向第一终端进行配置，或者，配置信令用于向使用同一个资源池的多个终端进行配置。具体地，配置信令用于向第一终端配置是否在选择已选资源后进行资源重选；或，配置信令用 于向使用同一资源池的多个终端配置是否在选择已选资源后进行资源重选，多个终端包括第一终端。
作为与图18并列的实施例，终端也可以接收预配置信息，预配置信息用于配置是否在选择已选资源后进行资源重选。
需要说明的一点是，在配置场景为“需要在选择已选资源后进行资源重选”的情况下，图14和图18中所示出的“配置信令”可以是同一个信令，也即，该配置信令不仅用于配置在选择已选资源后进行资源重选，且用于配置侦听窗口参数。但是不排除在其他一些实施例中，图14和图18中的“配置信令”可以是不同的两个信令。
需要说明的另一点是，上述侦听窗口参数以及是否针对已选资源进行资源重选，也可以由第一终端的内部代码自行实现，而无需其他设备进行配置。
需要说明的另一点是，终端可以自行决定是否在选择资源后进行资源重选操作并自行确定相关参数。例如，终端可以根据自身剩余电量或者测量信道占用率(Channel Busy Ratio，CBR)决定是否进行资源重选。当自身剩余电量较高或者测量的CBR较高时，进行资源重选操作。反之，则不进行资源重选操作。此处的“资源重选操作”是指，确定资源侦听窗进行侦听，根据资源侦听窗的侦听结果为已选资源与第二终端的预留资源发生资源冲突时，对已选资源进行资源重选。若不进行资源重选操作，则不需要确定资源侦听窗也不需要侦听。
图19示出了本申请一个示例性实施例示出的资源选择装置的框图。所述装置应用于第一终端中，或者，所述装置实现为第一终端，所述装置包括：
确定模块1920，用于确定资源侦听窗，所述资源侦听窗包括位于已选资源所在时隙m之前的一部分时隙；
重选模块1940，用于当所述资源侦听窗的侦听结果为所述已选资源与第二终端的预留资源发生资源冲突时，对所述已选资源进行资源重选。
在一个可选的实施例中，所述确定模块1920，用于根据侦听窗口参数确定所述资源侦听窗。
在一个可选的实施例中，所述侦听窗口参数包括：第一参数k；
所述确定模块1920，用于确定所述资源侦听窗包括：所述已选资源所在时隙m之前的k个时隙中的一部分时隙。
在一个可选的实施例中，所述侦听窗口参数包括：位图以及所述位图的时域起始位置；
所述确定模块1920，用于确定所述资源侦听窗包括：所述已选资源所在时隙m之前的至少一个时隙，所述至少一个时隙由所述位图以及所述位图的时域起始位置在时域上指定，所述位图中具有第一取值的比特所指示的时隙是所述资源侦听窗中的时隙。
在一个可选的实施例中，所述侦听窗口参数包括：第二参数P1和第三参数P2；
所述确定模块1920，用于确定所述资源侦听窗包括：时隙m-P1至时隙m-P2。
在一个可选的实施例中，所述侦听窗口参数包括：第四参数u和第五参数t；
所述确定模块1920，用于确定所述资源侦听窗包括：时隙u至时隙u+t，所述时隙u至时隙u+t位于所述已选资源所在时隙m之前。
在一个可选的实施例中，所述装置还包括：修正模块1980，用于在所述确定模块1920确定的所述资源侦听窗的最后一个时隙位于时隙m-T3或在时隙m-T3之后时，将所述资源侦听窗的最后一个时隙修正为时隙m-T3-1；
其中，T3为所述第一终端进行资源选择的时间。
接收模块1960，用于接收配置信令，所述配置信令用于配置所述侦听窗口参数。
在一个可选的实施例中，所述接收模块1960，用于接收网络设备发送的第一配置信令，所述第一配置信令包括：下行控制信息DCI；或，无线资源控制RRC信令；或，系统信息块SIB消息。
在一个可选的实施例中，所述接收模块1960，用于接收作为组头的第三终端发送的第二配置信令，所述第二配置信令包括：第一侧行控制信息；或，第二侧行控制信息；或，PC5-RRC信令；
其中，所述第一侧行控制信息是在PSCCH上传输的侧行控制信息，所述第二侧行控制信息是在PSSCH上传输的侧行控制信息。
在一个可选的实施例中，所述配置信令用于向所述第一终端配置所述侦听窗口参数；或，所述配置信令用于向使用同一资源池的多个终端配置所述侦听窗口参数，所述多个终端包括所述第一终端。
在一个可选的实施例中，所述装置还包括：接收模块1960，用于接收预配置信息，所述预配置信息用于配置所述侦听窗口参数。
在一个可选的实施例中，所述装置还包括：接收模块1960，用于接收配置信令，所述配置信令用于配置是否在选择所述已选资源后进行所述资源重选。
在一个可选的实施例中，所述接收模块1960，用于接收网络设备发送的第一配置信令，所述第一配置信令包括：下行控制信息DCI；或，无线资源控制RRC信令；或，系统信息块SIB消息。
在一个可选的实施例中，所述接收模块1960，用于接收作为组头的第三终端发送的第二配置信令，所述第二配置信令包括：第一侧行控制信息；或，第二侧行控制信息；或，PC5-RRC信令；
其中，所述第一侧行控制信息是在PSCCH上传输的侧行控制信息，所述第二侧行控制信息是在PSSCH上传输的侧行控制信息。
在一个可选的实施例中，所述配置信令，用于向所述第一终端配置是否在选择所述已选资源后进行所述资源重选；或，所述配置信令，用于向使用同一资源池的多个终端配置是否在选择所述已选资源后进行所述资源重选，所述多个终端包括所述第一终端。
在一个可选的实施例中，所述装置还包括：接收模块1960，用于接收预配置信息，所述预配置信息用于配置所述第一终端是否在选择所述已选资源后进行所述资源重选。
图20示出了本申请一个示例性实施例提供的终端的结构示意图，该终端包括：处理器101、接收器102、发射器103、存储器104和总线105。
处理器101包括一个或者一个以上处理核心，处理器101通过运行软件程序以及模块，从而执行各种功能应用以及信息处理。
接收器102和发射器103可以实现为一个通信组件，该通信组件可以是一块通信芯片。
存储器104通过总线105与处理器101相连。
存储器104可用于存储至少一个指令，处理器101用于执行该至少一个指令，以实现上述方法实施例中的各个步骤。
此外，存储器104可以由任何类型的易失性或非易失性存储设备或者它们的组合实现，易失性或非易失性存储设备包括但不限于：磁盘或光盘，电可擦除可编程只读存储器(Erasable Programmable Read Only Memory,EEPROM)，可擦除可编程只读存储器(Erasable Programmable Read Only Memory,EPROM)，静态随时存取存储器(Static Random Access Memory，SRAM)，只读存储器(Read-Only Memory,ROM)，磁存储器，快闪存储器，可编程只读存储器(Programmable Read-Only Memory,PROM)。
在示例性实施例中，还提供了一种计算机可读存储介质，所述计算机可读存储介质中存储有至少一条指令、至少一段程序、代码集或指令集，所述至少一条指令、所述至少一段程序、所述代码集或指令集由所述处理器加载并执行以实现上述各个方法实施例提供的由终端执行的资源选择方法。
本领域普通技术人员可以理解实现上述实施例的全部或部分步骤可以通过硬件来完成，也可以通过程序来指令相关的硬件完成，所述的程序可以存储于一种计算机可读存储介质中，上述提到的存储介质可以是只读存储器，磁盘或光盘等。
以上所述仅为本申请的可选实施例，并不用以限制本申请，凡在本申请的精神和原则之内，所作的任何修改、等同替换、改进等，均应包含在本申请的保护范围之内。

Claims (36)

  1. 一种资源选择方法，其特征在于，应用于第一终端中，所述方法包括：
    确定资源侦听窗，所述资源侦听窗包括位于已选资源所在时隙m之前的一部分时隙；
    当所述资源侦听窗的侦听结果为所述已选资源与第二终端的预留资源发生资源冲突时，对所述已选资源进行资源重选。
  2. 根据权利要求1所述的方法，其特征在于，所述确定资源侦听窗，包括：
    根据侦听窗口参数确定所述资源侦听窗。
  3. 根据权利要求2所述的方法，其特征在于，所述侦听窗口参数包括：第一参数k；所述根据侦听窗口参数确定所述资源侦听窗，包括：
    确定所述资源侦听窗包括：所述已选资源所在时隙m之前的k个时隙中的一部分时隙。
  4. 根据权利要求2所述的方法，其特征在于，所述侦听窗口参数包括：位图以及所述位图的时域起始位置；所述根据侦听窗口参数确定所述资源侦听窗，包括：
    确定所述资源侦听窗包括：所述已选资源所在时隙m之前的至少一个时隙，所述至少一个时隙由所述位图以及所述位图的时域起始位置在时域上指定，所述位图中具有第一取值的比特所指示的时隙是所述资源侦听窗中的时隙。
  5. 根据权利要求2所述的方法，其特征在于，所述侦听窗口参数包括：第二参数P1和第三参数P2；
    所述根据侦听窗口参数确定所述资源侦听窗，包括：
    确定所述资源侦听窗包括：时隙m-P1至时隙m-P2。
  6. 根据权利要求2所述的方法，其特征在于，所述侦听窗口参数包括：第四参数u和第五参数t；
    所述根据侦听窗口参数确定所述资源侦听窗，包括：
    确定所述资源侦听窗包括：时隙u至时隙u+t，所述时隙u至时隙u+t位于所述已选资源所在时隙m之前。
  7. 根据权利要求2至6任一所述的方法，其特征在于，所述方法还包括：
    在确定的所述资源侦听窗的最后一个时隙位于时隙m-T3或在所述时隙m-T3之后时，将所述资源侦听窗的最后一个时隙修正为时隙m-T3-1；
    其中，T3为所述第一终端进行资源选择的时间。
  8. 根据权利要求2至7任一所述的方法，其特征在于，所述方法还包括：
    接收配置信令，所述配置信令用于配置所述侦听窗口参数。
  9. 根据权利要求8所述的方法，其特征在于，所述接收配置信令，包括：
    接收网络设备发送的第一配置信令，所述第一配置信令包括：下行控制信息DCI；或，无线资源控制RRC信令；或，系统信息块SIB消息。
  10. 根据权利要求8所述的方法，其特征在于，所述接收配置信令，包括：
    接收作为组头的第三终端发送的第二配置信令，所述第二配置信令包括：第一侧行控制信息；或，第二侧行控制信息；或，PC5-RRC信令；
    其中，所述第一侧行控制信息是在PSCCH上传输的侧行控制信息，所述第二侧行控制信息是在PSSCH上传输的侧行控制信息。
  11. 根据权利要求8所述的方法，其特征在于，
    所述配置信令用于向所述第一终端配置所述侦听窗口参数；
    或，
    所述配置信令用于向使用同一资源池的多个终端配置所述侦听窗口参数，所述多个终端包括所述第一终端。
  12. 根据权利要求2至7任一所述的方法，其特征在于，所述方法还包括：
    接收预配置信息，所述预配置信息用于配置所述侦听窗口参数。
  13. 根据权利要求1至12任一所述的方法，其特征在于，所述方法还包括：
    接收配置信令，所述配置信令用于配置是否在选择所述已选资源后进行所述资源重选。
  14. 根据权利要求12所述的方法，其特征在于，所述接收配置信令，包括：
    接收网络设备发送的第一配置信令，所述第一配置信令包括：下行控制信息DCI；或，无线资源控制RRC信令；或，系统信息块SIB消息。
  15. 根据权利要求12所述的方法，其特征在于，所述接收配置信令，包括：
    接收作为组头的第三终端发送的第二配置信令，所述第二配置信令包括：第一侧行控制信息；或，第二侧行控制信息；或，PC5-RRC信令；
    其中，所述第一侧行控制信息是在PSCCH上传输的侧行控制信息，所述第二侧行控制信息是在PSSCH上传输的侧行控制信息。
  16. 根据权利要求12所述的方法，其特征在于，
    所述配置信令用于向所述第一终端配置是否在选择所述已选资源后进行所 述资源重选；
    或，
    所述配置信令用于向使用同一资源池的多个终端配置是否在选择所述已选资源后进行所述资源重选，所述多个终端包括所述第一终端。
  17. 根据权利要求1至12任一所述的方法，其特征在于，所述方法还包括：
    接收预配置信息，所述预配置信息用于配置所述第一终端是否在选择所述已选资源后进行所述资源重选。
  18. 一种资源选择装置，其特征在于，所述装置包括：
    确定模块，用于确定资源侦听窗，所述资源侦听窗包括位于已选资源所在时隙m之前的一部分时隙；
    重选模块，用于当所述资源侦听窗的侦听结果为所述已选资源与第二终端的预留资源发生资源冲突时，对所述已选资源进行资源重选。
  19. 根据权利要求18所述的装置，其特征在于，所述确定模块，用于根据侦听窗口参数确定所述资源侦听窗。
  20. 根据权利要求19所述的装置，其特征在于，所述侦听窗口参数包括：第一参数k；
    所述确定模块，用于确定所述资源侦听窗包括：所述已选资源所在时隙m之前的k个时隙中的一部分时隙。
  21. 根据权利要求19所述的装置，其特征在于，所述侦听窗口参数包括：位图以及所述位图的时域起始位置；
    所述确定模块，用于确定所述资源侦听窗包括：所述已选资源所在时隙m之前的至少一个时隙，所述至少一个时隙由所述位图以及所述位图的时域起始位置在时域上指定，所述位图中具有第一取值的比特所指示的时隙是所述资源侦听窗中的时隙。
  22. 根据权利要求19所述的装置，其特征在于，所述侦听窗口参数包括：第二参数P1和第三参数P2；
    所述确定模块，用于确定所述资源侦听窗包括：时隙m-P1至时隙m-P2。
  23. 根据权利要求19所述的装置，其特征在于，所述侦听窗口参数包括：第四参数u和第五参数t；
    所述确定模块，用于确定所述资源侦听窗包括：时隙u至时隙u+t，所述时隙u至时隙u+t位于所述已选资源所在时隙m之前。
  24. 根据权利要求19至23任一所述的装置，其特征在于，所述装置还包括：
    修正模块，用于在确定的所述资源侦听窗的最后一个时隙位于时隙m-T3或在所述时隙m-T3之后时，将所述资源侦听窗的最后一个时隙修正为时隙m-T3-1；
    其中，T3为所述第一终端进行资源选择的时间。
  25. 根据权利要求19至24任一所述的装置，其特征在于，所述装置还包括：
    接收模块，用于接收配置信令，所述配置信令用于配置所述侦听窗口参数。
  26. 根据权利要求25所述的装置，其特征在于，
    所述接收模块，用于接收网络设备发送的第一配置信令，所述第一配置信令包括：下行控制信息DCI；或，无线资源控制RRC信令；或，系统信息块SIB消息。
  27. 根据权利要求25所述的装置，其特征在于，
    所述接收模块，用于接收作为组头的第三终端发送的第二配置信令，所述第二配置信令包括：第一侧行控制信息；或，第二侧行控制信息；或，PC5-RRC信令；
    其中，所述第一侧行控制信息是在PSCCH上传输的侧行控制信息，所述第二侧行控制信息是在PSSCH上传输的侧行控制信息。
  28. 根据权利要求25所述的装置，其特征在于，
    所述配置信令用于向所述第一终端配置所述侦听窗口参数；
    或，
    所述配置信令用于向使用同一资源池的多个终端配置所述侦听窗口参数，所述多个终端包括所述第一终端。
  29. 根据权利要求19至24任一所述的装置，其特征在于，所述装置还包括：
    接收模块，用于接收预配置信息，所述预配置信息用于配置所述侦听窗口参数。
  30. 根据权利要求19至29任一所述的装置，其特征在于，所述装置还包括：
    接收模块，用于接收配置信令，所述配置信令用于配置是否在选择所述已选资源后进行所述资源重选。
  31. 根据权利要求30所述的装置，其特征在于，所述接收模块，用于接收 网络设备发送的第一配置信令，所述第一配置信令包括：下行控制信息DCI；或，无线资源控制RRC信令；或，系统信息块SIB消息。
  32. 根据权利要求30所述的装置，其特征在于，所述接收模块，用于接收作为组头的第三终端发送的第二配置信令，所述第二配置信令包括：第一侧行控制信息；或，第二侧行控制信息；或，PC5-RRC信令；
    其中，所述第一侧行控制信息是在PSCCH上传输的侧行控制信息，所述第二侧行控制信息是在PSSCH上传输的侧行控制信息。
  33. 根据权利要求30所述的装置，其特征在于，
    所述配置信令，用于向所述第一终端配置是否在选择所述已选资源后进行所述资源重选；
    或，
    所述配置信令，用于向使用同一资源池的多个终端配置是否在选择所述已选资源后进行所述资源重选，所述多个终端包括所述第一终端。
  34. 根据权利要求19至29任一所述的装置，其特征在于，所述装置还包括：
    接收模块，用于接收预配置信息，所述预配置信息用于配置所述第一终端是否在选择所述已选资源后进行所述资源重选。
  35. 一种终端，其特征在于，所述终端包括：
    处理器；
    与所述处理器相连的收发器；
    用于存储所述处理器的可执行指令的存储器；
    其中，所述处理器被配置为加载并执行所述可执行指令以实现如权利要求1至17中任一所述的资源选择方法。
  36. 一种计算机可读存储介质，其特征在于，所述可读存储介质中存储有可执行指令，所述可执行指令由所述处理器加载并执行以实现如权利要求1至17中任一所述的资源选择方法。
PCT/CN2020/074476 2020-02-07 2020-02-07 资源选择方法、装置、终端和介质 WO2021155556A1 (zh)

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