WO2022261899A1 - 侧行链路的资源选择方法、装置、设备及存储介质 - Google Patents

侧行链路的资源选择方法、装置、设备及存储介质 Download PDF

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Publication number
WO2022261899A1
WO2022261899A1 PCT/CN2021/100651 CN2021100651W WO2022261899A1 WO 2022261899 A1 WO2022261899 A1 WO 2022261899A1 CN 2021100651 W CN2021100651 W CN 2021100651W WO 2022261899 A1 WO2022261899 A1 WO 2022261899A1
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Prior art keywords
drx
period
resource
timer
terminal device
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PCT/CN2021/100651
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English (en)
French (fr)
Inventor
丁伊
赵振山
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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 CN202180097161.5A priority Critical patent/CN117158054A/zh
Priority to PCT/CN2021/100651 priority patent/WO2022261899A1/zh
Publication of WO2022261899A1 publication Critical patent/WO2022261899A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/02—Power saving arrangements

Definitions

  • the embodiments of the present application relate to the field of communication technologies, and in particular to a sidelink resource selection method, device, device, and storage medium.
  • the terminal device can select transmission resources from the resource pool by listening.
  • DRX discontinuous Reception, discontinuous reception
  • Embodiments of the present application provide a sidelink resource selection method, device, device, and storage medium. Described technical scheme is as follows:
  • a sidelink resource selection method is provided, the method is performed by a first terminal device, and the method includes:
  • the first time range includes the intersection of a link monitoring time period and a resource selection time period
  • the link monitoring time period is a time period determined according to DRX configuration
  • the resource selection time period is the time period of the first terminal The time period during which the device performs resource selection.
  • a sidelink resource exclusion method is provided, the method is performed by a first terminal device, and the method includes:
  • the number of candidate resources within the second time range in the candidate resource set is greater than or equal to W, and the W is greater than or equal to 0;
  • the second time range includes the intersection of the DRX activation time period and the resource selection time period
  • the DRX activation time period is a time period determined according to the DRX configuration
  • the resource selection time period is the time period of the first terminal The time period during which the device performs resource selection.
  • a sidelink resource selection method is provided, the method is performed by a first terminal device, and the method includes:
  • the first type of time range includes the intersection of the DRX activation period and the resource selection period
  • the DRX activation period is the running period of a DRX activation timer determined according to the DRX configuration
  • the resource selection period is the A time period during which the first terminal device selects resources.
  • a sidelink resource selection device includes:
  • a selection module configured to select at least N transmission resources within the first time range, where N is an integer greater than or equal to 1;
  • the first time range includes the intersection of a link monitoring time period and a resource selection time period
  • the link monitoring time period is a time period determined according to DRX configuration
  • the resource selection time period is performed by the first terminal device The time period for resource selection.
  • a sidelink resource exclusion device includes:
  • An exclusion module configured to exclude available resources within the resource selection time period to obtain a candidate resource set, the number of candidate resources in the second time range in the candidate resource set is greater than or equal to W, and the W is greater than or equal to 0;
  • the second time range includes the intersection of the DRX activation time period and the resource selection time period
  • the DRX activation time period is a time period determined according to the DRX configuration
  • the resource selection time period is performed by the first terminal device The time period for resource selection.
  • a sidelink resource selection device includes:
  • a selection module configured to select a transmission resource from a set of candidate resources, where the selected transmission resource exists in at least P time ranges of the first type, where P is an integer greater than or equal to 1;
  • the first type of time range includes the intersection of the DRX activation period and the resource selection period
  • the DRX activation period is the running period of a DRX activation timer determined according to the DRX configuration
  • the resource selection period is the first The time period during which the terminal device selects resources.
  • a terminal device includes a processor and a memory, a computer program is stored in the memory, and the processor executes the computer program to achieve any of the above aspects the method described.
  • a computer-readable storage medium is provided, and a computer program is stored in the storage medium, and the computer program is used to be executed by a processor to implement the method described in any of the above aspects .
  • a chip is provided, the chip includes a programmable logic circuit and/or program instructions, and when the chip is running, it is used to implement the method described in any one of the above aspects.
  • a computer program product or computer program includes computer instructions, the computer instructions are stored in a computer-readable storage medium, and a processor reads from the The computer-readable storage medium reads and executes the computer instructions to implement the method described in any one of the above aspects.
  • the first time range includes the intersection of the link monitoring time period of the receiver and the resource selection time period of the sender, thereby increasing the transmission
  • the transmission times of the terminal during the above-mentioned link monitoring time period ensures that the receiving terminal can receive the transmission of the transmitting terminal with a higher probability, thereby improving communication reliability.
  • the sender in the SL communication scenario, by ensuring that the sender has selected resources in at least P DRX activation periods, even if the receiver enters the sleep state due to packet loss and does not start the timer, it may be activated in the next DRX The retransmission of the same data is still received within the time period, improving communication reliability.
  • FIG. 1 is a schematic diagram of a network architecture provided by an embodiment of the present application.
  • FIG. 2 schematically shows a schematic diagram of a physical layer structure of SL communication
  • FIG. 3 exemplarily shows a schematic diagram of time-frequency resource position reservation
  • Fig. 4 exemplarily shows a schematic diagram of all interception and resource selection
  • FIG. 5 exemplarily shows a schematic diagram of resource selection for partial interception
  • FIG. 6 exemplarily shows a schematic diagram of a DRX cycle and a DRX activation period
  • FIG. 7 exemplarily shows a schematic diagram of a period corresponding to each DRX timer
  • FIG. 8 exemplarily shows a schematic diagram of the relationship between selected transmission resources and corresponding periods of each DRX timer
  • FIG. 9 is a flowchart of a sidelink resource selection method provided by an embodiment of the present application.
  • Fig. 10 exemplarily shows a schematic diagram of resource selection in all interception scenarios
  • Fig. 11 exemplarily shows a schematic diagram of resource selection in a partial interception scenario
  • FIG. 12 is a flowchart of a sidelink resource exclusion method provided by an embodiment of the present application.
  • Fig. 13 exemplarily shows a schematic diagram of resource exclusion in all interception scenarios
  • FIG. 14 exemplarily shows a schematic diagram of resource exclusion in a partial interception scenario
  • FIG. 15 is a flowchart of a sidelink resource selection method provided by another embodiment of the present application.
  • FIG. 16 exemplarily shows a schematic diagram of selecting transmission resources in all interception scenarios
  • Fig. 17 exemplarily shows a schematic diagram of selecting transmission resources in a partial interception scenario
  • FIG. 18 is a block diagram of a sidelink resource selection device provided by an embodiment of the present application.
  • FIG. 19 is a block diagram of a sidelink resource exclusion device provided by an embodiment of the present application.
  • FIG. 20 is a block diagram of a sidelink resource selection device provided by another embodiment of the present application.
  • Fig. 21 is a schematic structural diagram of a terminal device provided by an embodiment of the present application.
  • the network architecture and business scenarios described in the embodiments of the present application are for more clearly illustrating the technical solutions of the embodiments of the present application, and do not constitute limitations on the technical solutions provided by the embodiments of the present application.
  • the evolution of the technology and the emergence of new business scenarios, the technical solutions provided in the embodiments of this application are also applicable to similar technical problems.
  • FIG. 1 shows a schematic diagram of a network architecture provided by an embodiment of the present application.
  • the network architecture may include: a core network 11 , an access network 12 and a terminal device 13 .
  • the core network 11 includes several core network devices.
  • the functions of the core network equipment are mainly to provide user connections, manage users, and carry out services, and provide an interface to the external network as a bearer network.
  • the core network of the 5G (5th Generation, fifth-generation mobile communication technology) NR (New Radio, new air interface) system may include AMF (Access and Mobility Management Function, access and mobility management function) entities, UPF (User Plane Function, user plane function) entity and SMF (Session Management Function, session management function) entity and other devices.
  • AMF Access and Mobility Management Function, access and mobility management function
  • UPF User Plane Function
  • user plane function User Plane Function
  • SMF Session Management Function, session management function
  • the access network 12 includes several access network devices 14.
  • the access network in the 5G NR system may be called NG-RAN (New Generation-Radio Access Network, New Generation Radio Access Network).
  • the access network device 14 is a device deployed in the access network 12 to provide a wireless communication function for the terminal device 13 .
  • the access network device 14 may include various forms of macro base stations, micro base stations, relay stations, access points and so on.
  • the names of devices with access network device functions may be different.
  • they are called gNodeB or gNB.
  • the name "access network equipment” may change.
  • the above-mentioned devices that provide the wireless communication function for the terminal device 13 are collectively referred to as access network devices.
  • the number of terminal devices 13 is generally multiple, and one or more terminal devices 13 may be distributed in a cell managed by each access network device 14 .
  • the terminal device 13 may include various handheld devices with wireless communication functions, vehicle-mounted devices, wearable devices, computing devices or other processing devices connected to wireless modems, as well as various forms of user equipment, mobile stations (Mobile Station, MS) wait.
  • the devices mentioned above are collectively referred to as terminal devices.
  • the access network device 14 and the core network device communicate with each other through some air technology, such as the NG interface in the 5G NR system.
  • the access network device 14 and the terminal device 13 communicate with each other through some air technology, such as Uu interface.
  • the terminal device 13 and the terminal device 13 can communicate with each other through a direct connection communication interface (such as PC5 interface) , correspondingly, the communication link established based on the direct communication interface may be called a direct link or SL.
  • SL transmission is the direct communication data transmission between terminal devices through sidelinks. Unlike traditional cellular systems where communication data is received or sent through access network devices, SL transmission has short delay and low overhead.
  • the terminal device in this application refers to any device that communicates using the SL technology.
  • the "5G NR system" in the embodiments of the present disclosure may also be called a 5G system or an NR system, but those skilled in the art can understand its meaning.
  • the technical solution described in the embodiments of the present disclosure can be applied to the 5G NR system, and can also be applied to the subsequent evolution system of the 5G NR system.
  • 3GPP defines two transmission modes: Mode A and Mode B.
  • the transmission resource of the terminal device is allocated by the access network device (such as a base station), and the terminal device transmits communication data on the sidelink according to the transmission resources allocated by the access network device.
  • the access network device such as a base station
  • the transmission resources for a single transmission can be allocated to the terminal equipment, and the transmission resources for semi-static transmission can also be allocated to the terminal equipment.
  • Mode B The terminal device selects transmission resources from the resource pool to transmit communication data. Specifically, the terminal device may select transmission resources from the resource pool by listening, or select transmission resources from the resource pool by random selection.
  • PSCCH Physical Sidelink Control Channel, physical sidelink control channel
  • PSSCH Physical Sidelink Shared Channel, physical sidelink shared channel
  • PSCCH and PSSCH are sent in the same slot.
  • the above-mentioned first lateral control information and second lateral control information may be two lateral control information with different functions.
  • the first sideline control information is carried in the PSCCH, which mainly includes domains related to resource interception, so that other terminal devices can perform resource exclusion and resource selection after decoding.
  • the PSSCH also carries second sidelink control information.
  • the second sidelink control information mainly includes fields related to data demodulation, so as to facilitate other terminal devices to demodulate data in the PSSCH.
  • the terminal device selects the transmission resources to send data by itself.
  • Resource reservation is the premise of resource selection.
  • resource reservation within a TB Transport Block
  • resource reservation between TBs is supported as well as resource reservation between TBs.
  • the terminal device sends the first sideline control information, and uses the "Time resource assignment (time resource assignment)" and "Frequency resource assignment (frequency resource assignment)" fields to indicate the N time-frequency resources of the current TB (including resources currently used for sending).
  • Nmax is equal to 2 or 3.
  • the above N indicated time-frequency resources should be distributed in W time slots.
  • W is equal to 32.
  • the terminal device sends the first sidelink control information in the PSCCH while sending the initial transmission data on the PSSCH, and uses the above two fields to indicate the time-frequency resource positions of the initial transmission and retransmission 1 (i.e.
  • the initial transmission and the retransmission 1 are distributed in 32 time slots in the time domain.
  • the terminal device uses the first sideline control information sent in the PSCCH of retransmission 1 to indicate the time-frequency resource positions of retransmission 1 and retransmission 2, and retransmission 1 and retransmission 2 It is distributed in 32 time slots in the time domain.
  • the "Resource reservation period (resource reservation period)" field is used to reserve resources between TBs.
  • the terminal device 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 TB1, record is ⁇ (t 1 , f 1 ), (t 2 , f 2 ) ⁇ .
  • t 1 and t 2 represent the time domain positions of TB1 initial transmission and retransmission 1 resources
  • f 1 and f 2 represent corresponding frequency domain positions.
  • the SCI (Sidelink Control Information, sidelink control information) also indicates the time-frequency resource ⁇ (t 1 +100 ,f 1 ),(t 2 +100,f 2 ) ⁇ , these two resources are used for the transmission of TB2 initial transmission and retransmission 1.
  • the first sideline control information sent in TB1 retransmission 1 also uses the "Resource reservation period" field to reserve the time-frequency resources of TB2 retransmission 1 and retransmission 2.
  • the possible values of the "Resource reservation period" field are 0, 1-99, 100, 200, 300, 400, 500, 600, 700, 800, 900, and 1000 milliseconds.
  • V2X is more flexible.
  • e values are configured, and the terminal device determines possible values according to the used resource pool.
  • the value of e in the resource pool configuration is the resource reservation period set M, for example, e is less than or equal to 16.
  • the above-mentioned inter-TB reservation can be activated or deactivated in units of resource pools.
  • the "Resource reservation period" field is included in the first side line control information.
  • the inter-TB reservation is deactivated, the "Resource reservation period” field is not included in the first side line control information.
  • the value of the "Resource reservation period” field used by the terminal device, that is, the resource reservation period will not change.
  • the control information on one side uses the "Resource reservation period” field to reserve the resources of the next period for the transmission of another TB, so as to achieve periodic semi-persistent transmission.
  • the terminal device can obtain the first sidelink control information sent by other terminal devices by listening to the PSCCH sent by other terminal devices, so as to know the resources reserved by other terminal devices.
  • the terminal device selects resources, it will exclude resources reserved by other terminal devices, thereby avoiding resource collisions.
  • the terminal device In the NR V2X system, in the above mode B, the terminal device needs to select resources by itself.
  • the terminal device triggers resource selection or reselection at time slot n or time slot n is the time slot where the upper layer triggers the physical layer to report the candidate resource set, and the resource selection window starts from n+T 1 to n+T 2 End.
  • the terminal device determines T 2min from the value set according to the priority of its data to be sent. For example, when the subcarrier interval is 15kHz, the terminal device determines T 2min from the set ⁇ 1, 5, 10, 20 ⁇ according to the priority of its own data to be sent.
  • T 2min is greater than or equal to the remaining delay budget of the service
  • T 2 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.
  • the delay requirement is 50 milliseconds.
  • 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 milliseconds.
  • the terminal device performs resource monitoring from nT 0 to nT proc,0 (nT proc,0 is not included), and the value of T 0 is 100 or 1100 milliseconds.
  • T proc,0 is 1, 1, 2, 4 time slots.
  • a terminal device listens to the first sideline control information sent by other terminal devices in each time slot (except its own sending time slot).
  • time slot n triggers resource selection or reselection
  • the terminal device uses nT 0 to The result of nT proc,0 resource snooping.
  • Step 1 The terminal device takes all the available resources belonging to the resource pool used by the terminal device in the resource selection window as the resource set A, and any resource in the set A is recorded as R(x, y), and x and y respectively indicate the frequency domain of the resource location and time domain location. Note that the initial quantity of resources in collection A is M total .
  • the terminal device judges whether the resource R(x, y) or a series of periodic resources corresponding to the resource R(x, y) is the same as the time slot determined in Step 1-1 according to the unlistened time slot or in Step 1-2 according to The resources determined by the intercepted first lateral control information overlap, and if they overlap, the resource R(x,y) is excluded from the resource set A.
  • P rx is one of the resource reservation periods allowed by the resource pool used by the terminal device.
  • the terminal device will judge whether the Q time slots corresponding to each reserved period overlap with the resource R(x, y) or a series of periodic resources corresponding to the resource R(x, y). A resource R(x,y) is excluded from A.
  • the terminal device may not perform the above Step 1-1.
  • Step 1-1 if the number of remaining resources in the resource set A is less than M total *X, the terminal device initializes the resource set A as all resource pools belonging to the resource pool used by the terminal device in the resource selection window Available resources, then perform Step 1-2.
  • Step 1-2 If the terminal device detects the first sidelink control information transmitted in the PSCCH within the time slot m of the resource listening window, measure the SL-RSRP (Sidelink Reference Signal Received Power, sidelink reference signal) of the PSCCH received power) or the SL-RSRP of the PSSCH scheduled by the PSCCH (that is, the SL-RSRP of the PSSCH transmitted in the same time slot as the PSCCH).
  • SL-RSRP Systemlink Reference Signal Received Power, sidelink reference signal
  • the terminal device will reserve resources according to time slot m and the detected first sideline control information.
  • the resource reservation period is used as an interval to determine corresponding Q time slots.
  • the terminal device assumes that it has also received the first sideline control information with the same content in the Q time slots.
  • the terminal device will determine the resource and resource R indicated by the "Time resource assignment" and "Frequency resource assignment" fields of the first sidelink control information received in time slot m and the assumed Q pieces of first sidelink control information received.
  • T scal is equal to the value after converting T 2 into milliseconds.
  • P rx is the resource reservation period carried in the sensed first sideline control information.
  • the terminal device when the resource pool used by the terminal device activates the reservation between TBs, if the terminal device detects the first sideline control in the PSCCH on the resource E(v,m) of time slot m information, the resource reservation period in the first sideline control information is P rx , assuming that the Q value is calculated as 1, the terminal device will assume that the first sideline control information with the same content is also received on the time slot m+P rx . The terminal device will judge the first sideline control information received in time slot m and the "Time resource assignment" and "Frequency resource assignment" fields of the first sideline control information received in time slot m+P rx .
  • resource set A Exclude resource R(x,y) in .
  • the terminal device If the SL-RSRP measured by the terminal device is greater than the SL-RSRP threshold, and the resource pool used by the terminal device deactivates resource reservation between TBs, the terminal device only judges the "Time resource assignment" and "Frequency resource assignment" fields indicate whether the resource overlaps with the resource R(x,y) or a series of resources corresponding to the resource R(x,y), and if so, excludes the resource R from the resource set A( x,y).
  • the terminal device when the resource pool used by the terminal device deactivates the inter-TB reservation, if the terminal device detects the first side row in the PSCCH on the resource E(v,m) of time slot m control information, the terminal device judges that resources 1, 2, and 3 indicated by the fields "Time resource assignment” and "Frequency resource assignment" in the first side line control information are related to resource R(x, y) or resource R(x, y) Whether the corresponding series of periodic resources overlap, and if they overlap and satisfy the RSRP condition, the resource R(x,y) is excluded from the resource set A.
  • resource set A If the remaining resources in resource set A are less than M total *X after the above resources are excluded, raise the SL-RSRP threshold by 3dB and execute Step 1 again.
  • the physical layer reports the resource set A after resource exclusion as a candidate resource set to the upper layer.
  • Step 2 The upper layer randomly selects resources from the reported candidate resource set to send data. That is, the terminal device randomly selects a resource from the candidate resource set to send data.
  • the above RSRP threshold is determined by the priority P1 carried in the PSCCH sensed by the terminal device and the priority P2 of the data to be sent by the terminal device.
  • the configuration of the resource pool used by the terminal device includes an SL-RSRP threshold table, and the SL-RSRP threshold table includes SL-RSRP thresholds corresponding to all priority combinations.
  • the configuration of the resource pool can be network configuration or pre-configuration.
  • the SL-RSRP thresholds corresponding to different priority combinations are denoted by ⁇ ij , where i in ⁇ ij is priority j is the value of the priority level P1, and j is the value of the priority level P2.
  • the terminal device When the terminal device detects the PSCCH sent by other terminal devices, obtains the priority P1 carried in the first sidelink control information transmitted in the PSCCH and the priority P2 of the data to be sent, and the terminal device determines the SL by looking up table 1 - RSRP threshold.
  • the terminal device 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 device.
  • the configuration of the resource pool can be network configuration or pre-configuration.
  • the above X, the possible values of X are ⁇ 20%, 35%, 50% ⁇ .
  • the configuration of the resource pool used by the terminal device includes the corresponding relationship between the priority and the above possible values, and the terminal device 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 configured by the network or pre-configured.
  • the above introduction is an SL communication method in NR-V2X, that is, the terminal device independently selects transmission resources through resource monitoring, and performs data transmission on the sidelink by itself.
  • This SL communication method can also be applied to various SL communications such as direct communication between handheld terminals and direct communication between pedestrians and vehicles.
  • the above-mentioned method for terminal devices to independently select transmission resources through resource interception does not consider power saving.
  • the resource selection method of partial interception is an energy-saving and power-saving resource selection designed for power-sensitive terminals such as handheld terminals.
  • the method mainly achieves the purpose of energy saving by limiting the number of time units for resource selection and the number of time units for resource interception.
  • the terminal device determines the time slots to be listened to in the resource listening window according to at least Y time slots determined in the resource selection window and the resource reservation period set M or a subset of M in the resource pool configuration.
  • the resources in the at least Y time slots are excluded.
  • For the specific exclusion process please refer to Step 1 above, and select resources to send data from the resources that are not excluded.
  • the terminal device has determined a total of Y time slots from t 1 to ty in the resource selection window, and the resource reservation period set M in the resource pool configuration used by it includes periods P 1 , P 2 and P 3 .
  • the terminal device determines that the listening time slots in the resource listening window are t 1 -P 1 to t y -P 1 , t 1 -P 2 to t y -P 2 and t 1 -P 3 to t y -P 3 . That is, according to the Y time slots and each resource reservation period, the corresponding time slot belonging to the latest period of the resource listening window is determined.
  • the terminal device When the terminal device performs resource selection or reselection in time slot n, it will at least exclude resources in the above Y time slots based on the listening results and/or unlistened time slots in the time slots determined in the above resource listening window , for example, to exclude according to Step 1, and finally select resources from the remaining resources in the Y time slots to send data.
  • the above-mentioned partial listening mechanism is applicable to periodic transmission, and the position of time slot n is predicted according to the period, and then the resource selection window and the listening window are determined, and at least Y time slots are determined therefrom, and then based on at least Y The time slot determines the corresponding listening time slot.
  • the listening is performed.
  • resource selection or reselection is triggered, and transmission resources are selected from at least Y time slots.
  • the above at least Y time slots may be consecutive time slots or non-consecutive time slots.
  • the terminal device detects the PSCCH and/or PSSCH according to the network configuration or pre-configuration or other terminal configuration DRX cycle (DRX Cycle).
  • the terminal device detects PSCCH and/or PSSCH (which can be called active state (monitoring state/activation state)) during the DRX activation period (that is, the On duration period) in the DRX cycle. If there is no Activating other timers that make the terminal equipment enter the active state can enter the dormant state, and the DRX cycle is periodic, as shown in FIG. 6 for example.
  • the terminal device determines a basic DRX cycle and the On duration period in it at least according to sl-drx-Cycle, sl-drx-StartOffset, sl-drx-onDurationTimer and sl-drx-SlotOffset in the DRX configuration.
  • the terminal device determines the length of the DRX cycle according to the sl-drx-Cycle in the DRX configuration, and determine the starting position of the DRX cycle according to the sl-drx-StartOffset, sl-drx-Cycle, and sl-drx-SlotOffset parameters in the DRX configuration, On
  • the start position of the duration time period is consistent with the start position of the DRX cycle, and the length of the On duration time period is indicated by sl-drx-onDurationTimer.
  • the terminal device starts the On duration timer (DRX activation timer in this application) at the beginning of the On duration period, and enters the active state to detect PSCCH and/or PSSCH.
  • the On duration timer reaches 0, if there is no Start the timer that makes the terminal device enter the active state, then the terminal device can enter the sleep state to save energy and power.
  • Inactivity timer DRX inactivity timer in this application
  • HARQ Hybrid Automatic Repeat reQuest, hybrid automatic repeat request
  • RTT is also introduced (Round-Trip Time, round-trip time) timer (referred to as HARQ RTT timer in this application) and Retransmission timer (referred to as DRX retransmission timer in this application).
  • the terminal device when the terminal device detects new data or new TB or new MAC (Media Access Control, media access control) PDU (Protocol Data Unit, protocol data) before the On duration timer reaches 0, that is, within the On duration time period unit) or after the initial transmission, start the Inactivity timer, and detect the PSCCH and/or PSSCH within the time period corresponding to the Inactivity timer. Before the Inactivity timer decreases to 0, the retransmission of the same data is detected, that is, retransmission 1. Then the terminal device determines the time slot or symbol where the PSFCH (Physical Sidelink Feedback Channel, Physical Sidelink Feedback Channel) corresponding to retransmission 1 is located.
  • PSFCH Physical Sidelink Feedback Channel
  • the terminal device may determine the time slot or symbol where the PSFCH corresponding to the retransmission 1 is located according to the time domain position of the retransmission 1 and the mapping relationship.
  • the terminal device feeds back ACK (Acknowledgment, positive acknowledgment) or NACK (Negative Acknowledgment, negative acknowledgment) to the terminal that sent retransmission 1 in the PSFCH time slot or symbol.
  • ACK Acknowledgment, positive acknowledgment
  • NACK Negative Acknowledgment, negative acknowledgment
  • the terminal device may sleep.
  • the terminal device starts the HARQ RTT timer after the time slot or symbol corresponding to the PSFCH corresponding to retransmission 1. Within the time range corresponding to the HARQ RTT timer, the terminal device enters the dormant state. At this time, the terminal device assumes that the terminal sending retransmission 1 is at this time Perform operations such as preparing to retransmit data in the segment.
  • the terminal device starts the Retransmission timer, detects the PSCCH and/or PSSCH within the retransmission range, that is, detects possible retransmissions.
  • the terminal device detects the retransmission of the same data before the Retransmission timer decreases to 0, that is, retransmission 2. Then the terminal device determines the PSFCH time slot or symbol corresponding to retransmission 2 again, starts the HARQ RTT timer and the Retransmission timer again, and if no retransmission is detected, the terminal device enters the dormant state. And start the On duration timer at the starting position of the next On duration period, and enter the active state.
  • the terminal device after receiving the initial transmission, the terminal device also determines the PSFCH of the initial transmission, and starts the HARQ RTT timer.
  • the HARQ RTT timer is reduced to 0 or after it is reduced to 0, the Retransmission timer is started.
  • the time period corresponding to the Retransmission timer Internally detect PSCCH and/or PSSCH.
  • the terminal device For a certain time point, if the On duration timer or Inactivity timer or Retransmission timer is running, the terminal device needs to detect PSCCH and/or PSSCH.
  • the role of the Inactivity timer is to ensure that the terminal device continues to detect the PSCCH and/or PSSCH within a certain time range after receiving new data.
  • the function of the HARQ RTT timer is that the terminal device sleeps briefly when the terminal sending data is processing data.
  • the main purpose of the Retransmission timer is to detect corresponding retransmissions.
  • the Retransmission timer when it is not used simultaneously with the HARQ RTT timer, it starts immediately after receiving the PSCCH and/or PSSCH.
  • the standard has not yet discussed, when the receiving end is configured with DRX, how to design the sending end when performing resource selection or resource exclusion, possible designs such as adding certain resource exclusion or resource selection constraints in the time domain.
  • the sender selects the initial transmission within the On duration period, and selects the retransmission 1 within the range of (the time domain position of the initial transmission, the time domain position of the initial transmission plus the duration of the Inactivity timer]
  • the Retransmission 2 is selected within the range of (the time slot or symbol corresponding to PSFCH for retransmission 1 plus the duration of HARQ RTT timer, the time slot or symbol for retransmission 1 corresponding to PSFCH plus the duration of HARQ RTT timer plus the duration of Retransmission timer] , it can ensure that the receiving end can detect the initial transmission, retransmission 1 and retransmission 2.
  • this method of resource selection is risky.
  • the Inactivity timer will not be activated, and it will enter the dormant state after the On duration period ends, and the re-transmission cannot be detected. Transmission 1 and retransmission 2 cause the data transmission to fail.
  • the receiving end successfully receives the initial transmission, but if the receiving end does not detect retransmission 1 within (the time domain position of the initial transmission, the time domain position of the initial transmission plus the duration of the Inactivity timer], the receiving end will not be activated Retransmission timer, when the Inactivity timer is reduced to 0 or after it is reduced to 0, the receiving end enters a dormant state. Since the receiving end only receives the initial transmission from the sending end, the communication reliability is reduced.
  • the commonality of the above problems is that the receiving end configured with DRX, because it does not detect the transmission of the sending end within the time range of a specific timer (On duration timer or Inactivity timer or Retransmission timer), sleeps prematurely, thus losing reception. transmission opportunities, resulting in reduced communication reliability.
  • This application proposes an optimization scheme for this problem.
  • the "DRX activation period” mentioned in this article refers to the On duration period introduced above, and the On duration period can also be called the continuous monitoring time section or other titles, which is not limited in this application.
  • the "DRX activation timer” mentioned in this article refers to the On duration timer introduced above.
  • the On duration timer can also be called a continuous monitoring timer or other names, which is not limited in this application.
  • the "DRX inactivity timer” mentioned in this article refers to the Inactivity timer introduced above.
  • the “DRX retransmission timer” mentioned in this article refers to the Retransmission timer introduced above.
  • FIG. 9 shows a flow chart of a sidelink resource selection method provided by an embodiment of the present application.
  • the method can be applied to the network architecture shown in FIG. 1 , for example, the method can be executed by any terminal device.
  • the method may include the steps of:
  • Step 910 the first terminal device selects at least N transmission resources within the first time range, where N is an integer greater than or equal to 1; wherein, the first time range includes the intersection of the link monitoring time period and the resource selection time period, and the link
  • the channel monitoring time period is a time period determined according to DRX configuration, and the resource selection time period is a time period for the first terminal device to perform resource selection.
  • the first terminal device can be any terminal device.
  • the first terminal device can be used as the sending end of SL communication.
  • the first terminal device uses the method introduced in this embodiment to select transmission resources, and then uses the selected Transport resources send data.
  • the first terminal device may perform SL communication with one other terminal device, or may perform SL communication with multiple other terminal devices, so the receiving end may be one terminal device or multiple terminal devices.
  • the terminal device at the receiving end is referred to as a second terminal device. It should be understood that the number of second terminal devices may be one or multiple.
  • the link monitoring time period is a time period determined according to DRX configuration.
  • the link monitoring time period is a time period determined by the first terminal device according to DRX configuration.
  • the link monitoring time period refers to a time period during which the DRX-configured second terminal device monitors the sidelink.
  • the first terminal device may determine the link monitoring time period according to the DRX configuration, and the DRX configuration may be a DRX configuration specific to a certain second terminal device, or may be a DRX configuration shared by multiple second terminal devices.
  • the DRX configuration may be configured by the network device, or pre-configured, or specified by a standard, or indicated to the first terminal device by other terminal devices (such as the second terminal device), or depends on the implementation of the first terminal device.
  • the link monitoring period includes at least one of the following: a DRX activation period, a running period of the DRX activation timer, a running period of the DRX inactive timer, and a running period of the DRX retransmission timer.
  • the DRX activation period is equal to the operation period of the DRX activation timer, which is a part of the DRX cycle.
  • the second terminal device is in the active state during the DRX activation period/DRX activation timer operation period, and detects PSCCH and/or PSSCH .
  • the second terminal device After the second terminal device receives the first transmission data (or in other words, new data or new TB or new MAC PDU), it can start the DRX inactivation timer, and during the running period of the DRX inactivation timer, the second terminal device Continue to detect PSCCH and/or PSSCH. After receiving the initial transmission data or the retransmission data, the second terminal device may start the DRX retransmission timer, and during the running period of the DRX retransmission timer, the second terminal device continues to detect the PSCCH and/or PSSCH.
  • the first transmission data or in other words, new data or new TB or new MAC PDU
  • the resource selection time period includes at least one of the following: a complete time period corresponding to the resource selection window, and a partial time period determined from the resource selection window. If the first terminal device performs full sensing (or in other words, if the first terminal device does not perform partial sensing, or by default), then the resource selection time period is corresponding to the resource selection window full time period. If the first terminal device performs partial sensing, then the resource selection time period is a part of the time period determined from the resource selection window, for example, the resource selection time period includes at least Y time slots, the at least Y time slots may be continuous or discontinuous in the time domain.
  • the first time range may be any of the following situations:
  • Case 1 the intersection of the DRX activation period or the running period of the DRX activation timer and the resource selection window in the time domain;
  • Case 2 the intersection of the DRX activation period or the running period of the DRX activation timer and a part of the time period (such as at least Y time slots) determined by the first terminal device from the resource selection window in the time domain;
  • Case 3 the intersection of the running period of the DRX inactive timer and the resource selection window in the time domain;
  • Case 4 the intersection of the running period of the DRX inactive timer and a part of the time period (such as at least Y time slots) determined by the first terminal device from the resource selection window in the time domain;
  • Case 5 the intersection of the running period of the DRX retransmission timer and the resource selection window in the time domain;
  • Case 6 the intersection of the running period of the DRX retransmission timer and a part of the time period (for example, at least Y time slots) determined by the first terminal device from the resource selection window in the time domain.
  • the above-mentioned DRX activation period or the running period of the DRX activation timer refers to a time period from start to end of one or more target DRX activation timers determined by the first terminal device according to the DRX configuration.
  • the target DRX active timer is determined from at least one candidate DRX active timer, where the candidate DRX active timer is a DRX active timer whose operation period overlaps with the resource selection period.
  • the one or more target DRX activation timers include: all candidate DRX activation timers.
  • the above-mentioned one or more target DRX activation timers include: among the above-mentioned at least one candidate DRX activation timer, H candidate DRX activation timers at the front in the time domain, where H is a positive integer.
  • H is configured by the network device, or pre-configured, or specified by a standard, or indicated to the first terminal device by other terminal devices (such as the second terminal device), or depends on the implementation of the first terminal device.
  • the DRX active period or the running period of the DRX active timer refers to the time period from the start to the end of a target DRX active timer determined by the first terminal device according to the DRX configuration
  • the target DRX active timer is Among the above at least one candidate DRX activation timer, the candidate DRX activation timer with the highest time domain position. This example can be seen as a special case where H is equal to 1.
  • the one or more target DRX activation timers include: among the at least one candidate DRX activation timer, the candidate DRX activation timer whose intersection duration with the resource selection time period is the largest.
  • the DRX active period or the running period of the DRX active timer refers to the time period from the start to the end of a target DRX active timer determined by the first terminal device according to the DRX configuration
  • the target DRX active timer is Among the at least one candidate DRX activation timer, the candidate DRX activation timer with the largest intersection duration with the resource selection time period.
  • this candidate DRX activation timer is the target DRX activation timer;
  • the number of candidate DRX activation timers with the largest intersection duration is multiple, then a candidate DRX activation timer is determined from the multiple candidate DRX activation timers as the target DRX activation timer, for example, from the multiple candidate DRX activation timers Randomly select a candidate DRX active timer as the target DRX active timer, or a candidate DRX active timer with the highest time domain position among the multiple candidate DRX active timers as the target DRX active timer.
  • the above-mentioned running period of the DRX inactive timer refers to the period from start to end of the DRX inactive timer determined by the first terminal device according to the duration of the DRX inactive timer and the time domain position of the selected initial transmission resource. time period.
  • the running period of the DRX inactive timer is (t 1 , t 1 +t 2 ] or (t 1 , t 1 +t 2 ), where t 1 is the time domain position of the initial transmission resource, and t 2 is the DRX The duration of the inactive timer.
  • the duration of the above-mentioned DRX inactive timer (that is, the value of t2 ) is configured by the network equipment, or pre-configured, or standard regulations, or other terminal equipment (such as the second terminal equipment) Indicated to the first terminal device, or depends on the implementation of the first terminal device.
  • the above-mentioned running period of the DRX retransmission timer refers to the DRX retransmission timing corresponding to the target transmission resource determined by the first terminal device according to the duration of the DRX retransmission timer and the time domain position of the selected target transmission resource.
  • the running period of the DRX retransmission timer is (t 3 , t 3 +t 4 ] or (t 3 , t 3 +t 4 ), where t 3 is the time domain position of the target transmission resource, and t 4 is the DRX The length of the retransmission timer.
  • the above-mentioned running period of the DRX retransmission timer means that the first terminal device corresponds to the target transmission resource determined according to the duration of the HARQ RTT timer, the duration of the DRX retransmission timer, and the time domain position of the selected target transmission resource. The time period from start to end of the DRX retransmission timer.
  • the running period of the DRX retransmission timer is (t 5 +t 6 , t 5 +t 6 +t 4 ] or (t 5 +t 6 , t 5 +t 6 +t 4 ), where t 5 is The time domain position corresponding to the PSFCH resource corresponding to the target transmission resource, t6 is the duration of the HARQ RTT timer, and t4 is the duration of the DRX retransmission timer.
  • the above target transmission resource may be any transmission resource selected by the first terminal device, for example, the target transmission resource may be an initial transmission resource (referred to as an initial transmission resource), or any repeated transmission resource (referred to as a retransmission resource). resource).
  • the duration of the above-mentioned DRX retransmission timer (that is, the value of t4 ) is configured by the network device, or pre-configured, or specified by the standard, or indicated to the first terminal device by other terminal devices (such as the second terminal device), or depending on the implementation of the first terminal device.
  • the duration of the above HARQ RTT timer (that is, the value of t6) is configured by the network device, or pre - configured, or specified by the standard, or indicated to the first terminal device by other terminal devices (such as the second terminal device), or depends on Implementation of the first terminal device.
  • the duration of the DRX inactivity timer, the duration of the DRX retransmission timer, and the duration of the HARQ RTT timer are the configured duration or the indicated duration, that is, the duration before timing starts.
  • the above value of N depends on the implementation of the first terminal device, or is configured by the network device, or is pre-configured, or is specified by a standard.
  • the above N is an integer greater than 1.
  • N may be the same or different.
  • the first terminal device determines the resource listening window and the resource selection window, and selects the resources in the resource selection window according to the listening result in the resource listening window and/or the unlistened time slot. Perform exclusion to obtain a candidate resource set.
  • the specific process can refer to the introduction above and will not be repeated here.
  • the first terminal device randomly selects transmission resources from the candidate resource set. Assuming that N is 2, the first terminal device should ensure that at least 2 transmission resources are selected within the first time range. For example, when the first time range is the above case 1, the first terminal device selects 4 resources in the intersection of the resource selection window and two On duration time periods (ie, DRX activation period), that is, initial transmission, retransmission 1, Retransmit 6 and Retransmit 7.
  • the first terminal device selects two resources in the intersection of the resource selection window and an On duration period (ie, DRX activation period), such as initial transmission and retransmission 1, or retransmission 6 and retransmission 7.
  • DRX activation period ie, DRX activation period
  • the first terminal device selects 3 resources in the intersection of the resource selection window and the time range corresponding to the Inactivity timer (that is, the running period of the DRX inactivity timer), that is, retransmission 1, Retransmission 2 and Retransmission 3.
  • the first terminal device selects in the intersection of the resource selection window and the time range corresponding to the Retransmission timer (that is, the running period of the DRX retransmission timer) 2 resources, retransmission 4 and retransmission 5.
  • the Retransmission timer that is, the running period of the DRX retransmission timer
  • the first terminal device determines the resource listening window and the resource selection window, and determines Y selected time slots t 1 to ty in the resource selection window, and according to the selected time slot and resource
  • the set of resource reservation periods configured in the pool or a subset thereof determines the corresponding listening time slot in the listening window. Assuming that the set of resource reservation periods includes resource reservation periods P 1 and P 2 , the listening time slots determined by the first terminal device are t 1 -P 1 to t y -P 1 and t 1 -P 2 to t y - P2 .
  • the first terminal device excludes the resources in the selected time slot according to at least the interception result in the determined interception time slot and/or the unintercepted time slot, to obtain the candidate resource set.
  • the first terminal device randomly selects a transmission resource from the candidate resource set. Assuming that N is 2, the first terminal device should ensure that at least 2 transmission resources are selected within the first time range. For example, when the first time range is the above case 2, the first terminal device selects 2 resources in the intersection of the determined selection time slot and 1 On duration time period (ie DRX activation period), that is, initial transmission and retransmission 1.
  • the first terminal device selects 3 resources in the intersection of the determined selected time slot and the time range corresponding to the Inactivity timer (that is, the running period of the DRX inactivity timer), that is, retransmits 1. Retransmission 2 and retransmission 3.
  • the exchange between the first terminal device and the time range corresponding to the Retransmission timer (that is, the running period of the DRX retransmission timer) in the determined selection time slot Centrally select 2 resources, retransmission 4 and retransmission 5.
  • the first terminal device may select less than N transmission resources within the first time range (including not selecting transmission resources within the first time range).
  • the foregoing exceptions at least include: the first terminal device cannot select at least N transmission resources within the first time range according to the remaining resource distribution in the candidate resource set. For example, the number of time slots where the resources in the first time range in the candidate resource set are located is less than N or the number of resources in the first time range in the candidate resource set is less than N.
  • the above-mentioned first time range may be only one of the above situations, or multiple situations may appear at the same time. For example, when multiple situations occur simultaneously, at least two situations among situations 1, 3, and 5 may occur simultaneously, or at least two situations among situations 2, 4, and 6 may occur simultaneously.
  • the first time range includes the link monitoring time period of the receiving end and the resource selection time of the sending end.
  • the sending end increases the number of transmissions during the running period of the DRX activation timer (ie, the DRX activation period), so that the receiving end can receive multiple transmissions in the active state, increasing communication reliability.
  • the sending end increases the number of transmissions during the running period of the DRX inactivation timer and/or the running period of the DRX retransmission timer, which reduces the probability that the receiving end enters the sleep state because it does not detect a certain transmission. Helps increase communication reliability.
  • FIG. 12 shows a flowchart of a sidelink resource exclusion method provided by an embodiment of the present application.
  • the method can be applied to the network architecture shown in FIG. 1 , for example, the method can be executed by any terminal device.
  • the method may include the steps of:
  • Step 1210 the first terminal device excludes available resources within the resource selection time period to obtain a candidate resource set, the number of candidate resources in the candidate resource set within the second time range is greater than or equal to W, and W is greater than or equal to 0 ;
  • the second time range includes the intersection of the DRX activation time period and the resource selection time period, the DRX activation time period is a time period determined according to the DRX configuration, and the resource selection time period is the time period during which the first terminal device performs resource selection.
  • the first terminal device may be any terminal device.
  • the first terminal device may be used as the sending end of the SL communication.
  • the method described in this embodiment is used to exclude resources and determine the set of candidate resources.
  • a transmission resource is selected from the candidate resource set to transmit data.
  • the first terminal device may perform SL communication with one other terminal device, or may perform SL communication with multiple other terminal devices, so the receiving end may be one terminal device or multiple terminal devices.
  • the terminal device at the receiving end is referred to as a second terminal device. It should be understood that the number of second terminal devices may be one or multiple.
  • the DRX activation time period is a time period determined according to DRX configuration.
  • the DRX activation time period is a time period determined by the first terminal device according to DRX configuration.
  • the DRX activation time period refers to a time period during which the second terminal device configured with DRX is in an active state (ie active state).
  • the first terminal device may determine the DRX activation time period according to the DRX configuration, and the DRX configuration may be a DRX configuration specific to a certain second terminal device, or a DRX configuration common to multiple second terminal devices.
  • the DRX configuration may be configured by the network device, or pre-configured, or specified by a standard, or indicated to the first terminal device by other terminal devices (such as the second terminal device), or depends on the implementation of the first terminal device.
  • the DRX activation period includes at least one of the following: a DRX activation period, and a running period of the DRX activation timer.
  • the DRX activation period is equal to the operation period of the DRX activation timer, which is a part of the DRX cycle.
  • the second terminal device is in the active state during the DRX activation period/DRX activation timer operation period, and detects PSCCH and/or PSSCH .
  • the resource selection time period includes at least one of the following: a complete time period corresponding to the resource selection window, and a partial time period determined from the resource selection window. If the first terminal device performs full sensing (or in other words, if the first terminal device does not perform partial sensing, or by default), then the resource selection time period is corresponding to the resource selection window full time period. If the first terminal device performs partial sensing, then the resource selection time period is a part of the time period determined from the resource selection window, for example, the resource selection time period includes at least Y time slots, the at least Y time slots may be continuous or discontinuous in the time domain.
  • the second time range may be any of the following situations:
  • Case 1 the intersection of the DRX activation period or the running period of the DRX activation timer and the resource selection window in the time domain;
  • Case 2 the intersection of the DRX activation period or the running period of the DRX activation timer and a part of the time period (for example, at least Y time slots) determined by the first terminal device from the resource selection window in the time domain.
  • the above-mentioned DRX activation period or the running period of the DRX activation timer refers to a time period from start to end of one or more target DRX activation timers determined by the first terminal device according to the DRX configuration.
  • the target DRX active timer is determined from at least one candidate DRX active timer, where the candidate DRX active timer is a DRX active timer whose operation period overlaps with the resource selection period.
  • the one or more target DRX activation timers include: all candidate DRX activation timers.
  • the above-mentioned one or more target DRX activation timers include: among the above-mentioned at least one candidate DRX activation timer, H candidate DRX activation timers at the front in the time domain, where H is a positive integer.
  • H is configured by the network device, or pre-configured, or specified by a standard, or indicated to the first terminal device by other terminal devices (such as the second terminal device), or depends on the implementation of the first terminal device.
  • the DRX active period or the running period of the DRX active timer refers to the time period from the start to the end of a target DRX active timer determined by the first terminal device according to the DRX configuration
  • the target DRX active timer is Among the above at least one candidate DRX activation timer, the candidate DRX activation timer with the highest time domain position.
  • H is equal to 1.
  • the one or more target DRX activation timers include: among the at least one candidate DRX activation timer, the candidate DRX activation timer whose intersection duration with the resource selection time period is the largest.
  • the DRX active period or the running period of the DRX active timer refers to the time period from the start to the end of a target DRX active timer determined by the first terminal device according to the DRX configuration
  • the target DRX active timer is Among the at least one candidate DRX activation timer, the candidate DRX activation timer with the largest intersection duration with the resource selection time period.
  • this candidate DRX activation timer is the target DRX activation timer;
  • the number of candidate DRX activation timers with the largest intersection duration is multiple, then a candidate DRX activation timer is determined from the multiple candidate DRX activation timers as the target DRX activation timer, for example, from the multiple candidate DRX activation timers Randomly select a candidate DRX active timer in the register as the target DRX active timer, or a candidate DRX active timer with the highest time domain position among the plurality of candidate DRX active timers is used as the target DRX active timer.
  • the value of W is any one of the following situations:
  • R is a numerical value greater than or equal to 0 and less than or equal to 1. S in the above case may be indicated to the physical layer by a higher layer.
  • the above value of R is configured by the network device, or pre-configured, or specified by the standard, or indicated to the first terminal device by other terminal devices (such as the second terminal device), or depends on the implementation of the first terminal device.
  • the value of R is related to the resource pool configuration, or the value of R is related to the priority of the data to be sent. For example, the value of R may be determined in a manner similar to the manner of determining the value of X introduced above.
  • the first terminal device determines the resource listening window and the resource selection window, and selects the resources in the resource selection window according to the listening result in the resource listening window and/or the unlistened time slot.
  • the second time range is the intersection of the time range corresponding to the On duration timer (that is, the running period of the DRX activation timer) and the resource selection window in the time domain.
  • the time range corresponding to the On duration timer is the time period from the start to the end of all On duration timers that intersect with the resource selection window. The first terminal device should ensure that the number of remaining candidate resources within the second time range in the candidate resource set is greater than or equal to W after resource exclusion.
  • the first terminal device determines the resource listening window and the resource selection window, and determines Y selected time slots t 1 to ty in the resource selection window, and according to the selected time slot and resource
  • the set of resource reservation periods configured in the pool or a subset thereof determines the corresponding listening time slot in the listening window. Assuming that the set of resource reservation periods includes resource reservation periods P 1 and P 2 , the listening time slots determined by the first terminal device are t 1 -P 1 to t y -P 1 and t 1 -P 2 to t y - P2 .
  • the first terminal device excludes resources in the selected time slot at least according to the interception result in the determined interception time slot and/or the non-intercepted time slot.
  • the second time range is the intersection of the time range corresponding to the On duration timer (that is, the running period of the DRX activation timer) and the Y time slots determined by the first terminal device in the time domain.
  • the time range corresponding to the On duration timer is the time period from the start to the end of all the On duration timers that overlap with the Y time slots determined by the first terminal device.
  • the first terminal device should ensure that the number of remaining candidate resources within the second time range in the candidate resource set is greater than or equal to W after resource exclusion.
  • the first terminal device performs the following steps to exclude available resources within the resource selection time period to obtain a candidate resource set, so as to ensure that the number of remaining candidate resources in the candidate resource set within the second time range is greater than or is equal to W:
  • the initialized available resource set includes all available resources in the resource selection time period, and the number of resources in the initialized available resource set is M total ;
  • X is a value greater than 0 and less than or equal to 1, and the determination method of X can be referred to above, and will not be repeated here.
  • the above-mentioned second step "based on the listening result and/or unlistened time slot, exclude the available resources in the available resource set to obtain the first remaining resource set” may further include the following steps:
  • the available resource set (that is, the above-mentioned The available resources in the available resource set initialized in step 1) are excluded to obtain the first remaining resource set;
  • the second remaining resource set is greater than or equal to M total *X and the number of resources in the second remaining resource set within the second time range is greater than or equal to W, then based on the interception result, the second The available resources in the remaining resource set are excluded to obtain the first remaining resource set.
  • the first terminal device may perform the following steps to exclude resources:
  • Step 1 Perform resource exclusion on the resource set A according to the unlistened time slots in the resource listening window (for details, refer to Step 1-1).
  • this step may be executed or not executed according to whether the resource pool activates inter-TB reservation.
  • the number of remaining candidate resources in resource set A is less than M total *X or the number of remaining candidate resources in resource set A within the second time range is less than W , then initialize the resource set A as all available resources in the resource selection window, and then perform the following step 3.
  • Step 1-2 Perform resource exclusion on the resource set A according to the first lateral control information intercepted in the resource listening window (for details, refer to Step 1-2).
  • the first terminal device may perform the following steps to exclude resources:
  • step 2 Perform resource exclusion on the resource set A at least according to non-monitored time slots in the determined listening time slots within the resource listening window.
  • this step may be executed or not executed according to whether the resource pool activates inter-TB reservation.
  • the first terminal device when configured to perform partial interception, it may not perform it.
  • the resource set A is initialized as all available resources in at least Y time slots determined by the first terminal device, and then the following step 3 is performed.
  • the available resources in the resource selection time period refer to all available resources belonging to the resource pool used by the first terminal device in the resource selection time period.
  • the available resources in the resource selection window refer to all available resources in the resource selection window belonging to the resource pool used by the first terminal device.
  • the resource selection time period is a part of the time period (such as at least Y time slots) determined from the resource selection window
  • the available resources in the part of the time period refer to All available resources belonging to the resource pool used by the first terminal device within the part of the time period (for example, at least Y time slots).
  • FIG. 15 shows a flowchart of a sidelink resource selection method provided by another embodiment of the present application.
  • the method can be applied to the network architecture shown in FIG. 1 , for example, the method can be executed by any terminal device.
  • the method may include the steps of:
  • Step 1510 the first terminal device selects a transmission resource from the candidate resource set, and the selected transmission resource exists in at least P first-type time ranges, where P is an integer greater than or equal to 1; wherein, the first-type time range Including the intersection of the DRX activation period and the resource selection period, the DRX activation period is the running period of a DRX activation timer determined according to the DRX configuration, and the resource selection period is the time period for the first terminal device to perform resource selection.
  • the first terminal device can be any terminal device.
  • the first terminal device can be used as the sending end of SL communication.
  • the first terminal device uses the method introduced in this embodiment to select transmission resources, and then uses the selected Transport resources send data.
  • the first terminal device may perform SL communication with one other terminal device, or may perform SL communication with multiple other terminal devices, so the receiving end may be one terminal device or multiple terminal devices.
  • the terminal device at the receiving end is referred to as a second terminal device. It should be understood that the number of second terminal devices may be one or multiple.
  • the DRX activation period is a running period of a DRX activation timer determined according to the DRX configuration.
  • the DRX activation period is a running period of a DRX activation timer determined by the first terminal device according to the DRX configuration.
  • the DRX activation period refers to a running period of a DRX activation timer of the second terminal device configured with DRX.
  • the first terminal device may determine the DRX activation period according to the DRX configuration, and the DRX configuration may be a DRX configuration specific to a certain second terminal device, or a DRX configuration common to multiple second terminal devices.
  • the DRX configuration may be configured by the network device, or pre-configured, or specified by a standard, or indicated to the first terminal device by other terminal devices (such as the second terminal device), or depends on the implementation of the first terminal device.
  • the DRX activation period is equal to the operation period of the DRX activation timer, which is a part of the DRX cycle.
  • the second terminal device is in the active state during the DRX activation period/DRX activation timer operation period, and detects PSCCH and/or PSSCH .
  • the resource selection time period includes at least one of the following: a complete time period corresponding to the resource selection window, and a partial time period determined from the resource selection window. If the first terminal device performs full sensing (or in other words, if the first terminal device does not perform partial sensing, or by default), then the resource selection time period is corresponding to the resource selection window full time period. If the first terminal device performs partial sensing, then the resource selection time period is a part of the time period determined from the resource selection window, for example, the resource selection time period includes at least Y time slots, the at least Y time slots may be continuous or discontinuous in the time domain.
  • the first type of time range may be any of the following situations:
  • Case 1 the intersection of a DRX activation period or a running period of a DRX activation timer and the resource selection window in the time domain;
  • Case 2 the intersection of a DRX activation period or a running period of a DRX activation timer and a part of the time period (eg at least Y time slots) determined by the first terminal device from the resource selection window in the time domain.
  • the DRX activation period refers to the time period from the start to the end of a target DRX activation timer determined by the first terminal device according to the DRX configuration
  • the target DRX activation timer is any one that has an intersection between the running period and the resource selection time period DRX activation timer.
  • the value of P depends on the implementation of the first terminal device, or is configured by the network device, or is pre-configured, or is specified by a standard.
  • P is an integer greater than 1.
  • P is less than or equal to U
  • U is the total number of time ranges of the first type included in the resource selection time period.
  • the above-mentioned P first-type time ranges refer to the P first-type time ranges that are located earlier in the time domain among the first-type time ranges included in the resource selection time period.
  • the first terminal device when selecting transmission resources, ensures that the selected transmission resources exist within at least P time ranges of the first type.
  • the first terminal device selects transmission resources, it ensures that the selected transmission resources are within at least P first exist within the same time frame.
  • the first terminal device when the first terminal device selects the transmission resources, it may not satisfy the above restriction conditions (that is, ensure that the selected transmission resources exist within at least P time ranges of the first type).
  • the above exceptions at least include: (1) P is greater than U; (2) the first terminal device cannot select transmission resources within one or more time ranges of the first type according to the remaining resource distribution in the candidate resource set, such as the candidate resource set Resources in that fall within one or more of the first type of time ranges are excluded.
  • the first terminal device determines the resource listening window and the resource selection window, and selects the resources in the resource selection window according to the listening result in the resource listening window and/or the unlistened time slot. Perform resource exclusion to obtain candidate resource sets.
  • the specific process can refer to the introduction above and will not be repeated here.
  • the first terminal device randomly selects transmission resources from the candidate resource set, and the first terminal device determines that the total U of the first type of time range is 4. Assuming that P is 3, the first terminal device should ensure that at least 3 first type time ranges The selected resource exists in both.
  • the first terminal device selects transmission resources, it is guaranteed that the selected resources exist in the first three time ranges of the first type in the time domain (the initial transmission is located in the first time range of the first type in the time domain, and the retransmission Retransmission 1 and retransmission 2 are located in the second first-type time range in the time domain, and retransmission 3 is located in the third first-type time range in the time domain).
  • the first terminal device determines the resource listening window and the resource selection window, determines Y selected time slots t 1 to ty in the resource selection window, and The set of resource reservation periods configured in the pool or a subset thereof determines the corresponding listening time slot in the listening window. Assuming that the set of resource reservation periods includes resource reservation periods P 1 and P 2 , the listening time slots determined by the first terminal device are t 1 -P 1 to t y -P 1 and t 1 -P 2 to t y - P2 . The first terminal device excludes the resources in the selected time slot according to at least the interception result in the determined interception time slot and/or the unintercepted time slot, to obtain the candidate resource set.
  • the first terminal device randomly selects transmission resources from the candidate resource set.
  • the total number U of the first-type time range determined by the first terminal device is 2.
  • P the first terminal device should ensure that at least two first-type time ranges
  • the selected resource exists in scope. For example, in Figure 17, when the first terminal device selects transmission resources, it is guaranteed that the selected resources exist within the two first-type time ranges (initial transmission and retransmission 1 are within the first first-type time range in the time domain, and retransmission Transmission 1 and retransmission 2 are in the second first type of time range in the time domain).
  • FIG. 18 shows a block diagram of a sidelink resource selection device provided by an embodiment of the present application.
  • the device has the function of realizing the above method example, and the function may be realized by hardware, or may be realized by executing corresponding software by hardware.
  • the apparatus may be the first terminal device described above, or may be set in the first terminal device. As shown in FIG. 18 , the apparatus 1800 may include: a selection module 1810 .
  • a selection module 1810 configured to select at least N transmission resources within a first time range, where N is an integer greater than or equal to 1; wherein, the first time range includes a link monitoring time period and a resource selection time period intersection, the link monitoring time period is a time period determined according to DRX configuration, and the resource selection time period is a time period for the first terminal device to perform resource selection.
  • the link monitoring period includes at least one of the following: a DRX activation period, a running period of a DRX activation timer, a running period of a DRX inactive timer, and a running period of a DRX retransmission timer.
  • the DRX activation period or the running period of the DRX activation timer refers to the time from start to end of one or more target DRX activation timers determined by the first terminal device according to the DRX configuration part.
  • the target DRX activation timer is determined from at least one candidate DRX activation timer, and the candidate DRX activation timer is a DRX activation timer whose operation period overlaps with the resource selection period.
  • the one or more target DRX activation timers include: all of the candidate DRX activation timers; or, among the at least one candidate DRX activation timer, H candidate DRX activation timers at the front in the time domain An activation timer, where the H is a positive integer; or, among the at least one candidate DRX activation timer, the candidate DRX activation timer with the largest intersection duration with the resource selection time period.
  • the running period of the DRX inactivity timer refers to the DRX inactivity period determined by the first terminal device according to the duration of the DRX inactivity timer and the time domain position of the selected initial transmission resource. The period of time from start to end of the activation timer.
  • the running period of the DRX inactive timer is (t 1 , t 1 +t 2 ] or (t 1 , t 1 +t 2 ), where the t 1 is the initial transmission resource time domain position, the t 2 is the duration of the DRX inactivity timer.
  • the running period of the DRX retransmission timer refers to the target transmission resource determined by the first terminal device according to the duration of the DRX retransmission timer and the time domain position of the selected target transmission resource. The time period from the start to the end of the DRX retransmission timer corresponding to the resource.
  • the running period of the DRX retransmission timer is (t 3 , t 3 +t 4 ] or (t 3 , t 3 +t 4 ), where the t 3 is the target transmission resource time domain position, the t4 is the duration of the DRX retransmission timer.
  • the running period of the DRX retransmission timer refers to the time domain position of the first terminal device according to the duration of the HARQ RTT timer, the duration of the DRX retransmission timer, and the selected target transmission resource , the determined time period from start to end of the DRX retransmission timer corresponding to the target transmission resource.
  • the running period of the DRX retransmission timer is (t 5 +t 6 , t 5 +t 6 +t 4 ] or (t 5 +t 6 , t 5 +t 6 +t 4 ), where , the t 5 is the time domain position corresponding to the PSFCH resource corresponding to the target transmission resource, the t 6 is the duration of the HARQ RTT timer, and the t 4 is the duration of the DRX retransmission timer .
  • the resource selection time period includes at least one of the following: a complete time period corresponding to the resource selection window, and a partial time period determined from the resource selection window.
  • the value of N depends on the implementation of the first terminal device, or is configured by a network device, or is pre-configured, or is specified by a standard.
  • the first time range includes the link monitoring time period of the receiving end and the resource selection time of the sending end.
  • FIG. 19 shows a block diagram of a sidelink resource exclusion device provided by an embodiment of the present application.
  • the device has the function of realizing the above method example, and the function may be realized by hardware, or may be realized by executing corresponding software by hardware.
  • the apparatus may be the first terminal device described above, or may be set in the first terminal device. As shown in FIG. 19 , the apparatus 1900 may include: an exclusion module 1910 .
  • the exclusion module 1910 is configured to exclude available resources within the resource selection time period to obtain a candidate resource set, where the number of candidate resources within the second time range in the candidate resource set is greater than or equal to W, and W is greater than or equal to equal to 0; wherein, the second time range includes the intersection of the DRX activation time period and the resource selection time period, the DRX activation time period is a time period determined according to the DRX configuration, and the resource selection time period is the first The time period during which the terminal device selects resources.
  • the DRX activation period includes at least one of the following: a DRX activation period, and a running period of a DRX activation timer.
  • the DRX activation period or the running period of the DRX activation timer refers to the time from start to end of one or more target DRX activation timers determined by the first terminal device according to the DRX configuration part.
  • the target DRX activation timer is determined from at least one candidate DRX activation timer, and the candidate DRX activation timer is a DRX activation timer whose operation period overlaps with the resource selection period.
  • the one or more target DRX activation timers include: all of the candidate DRX activation timers; or, among the at least one candidate DRX activation timer, H candidate DRX activation timers at the front in the time domain An activation timer, where the H is a positive integer; or, among the at least one candidate DRX activation timer, the candidate DRX activation timer with the longest intersection duration with the resource selection time period.
  • the resource selection time period includes at least one of the following: a complete time period corresponding to the resource selection window, and a partial time period determined from the resource selection window.
  • the W R*M 2 , the M 2 is the total number of available resources in a part of the time period determined by the first terminal device from the resource selection window; or,
  • the W R*M 3 , the M 3 is the total number of available resources within the second time range; or,
  • the W S*R*M 1 , the S is the number of transmission resources that the first terminal device plans to select within the second time range, and the M 1 is the total number of available resources in the resource selection window; or,
  • the W S*R*M 2 , the S is the number of transmission resources that the first terminal device plans to select within the second time range, and the M 2 is the number of resources selected by the first terminal device from resources The total number of resources available during the portion of the time period identified in the window; or,
  • the W S*R*M 3 , the S is the number of transmission resources that the first terminal device plans to select within the second time range, and the M 3 is the available resources within the second time range total;
  • the R is a value greater than or equal to 0 and less than or equal to 1.
  • the value of R depends on the implementation of the first terminal device, or is configured by a network device, or is pre-configured, or is specified by a standard.
  • the value of R is configured by the network device, or pre-configured, or specified by a standard, or indicated to the first terminal device by other terminal devices, or depends on the implementation of the first terminal device.
  • the exclusion module is used for:
  • Determining an initialized set of available resources where the initialized set of available resources includes all available resources within the resource selection time period, and the number of resources in the initialized set of available resources is M total ;
  • the determining the first remaining resource set as the candidate resource set If the number of resources in the first remaining resource set is greater than or equal to M total *X and the number of resources in the first remaining resource set within the second time range is greater than or equal to the W, then the determining the first remaining resource set as the candidate resource set;
  • the X is a value greater than 0 and less than or equal to 1.
  • FIG. 20 shows a block diagram of an apparatus for selecting sidelink resources according to another embodiment of the present application.
  • the device has the function of realizing the above method example, and the function may be realized by hardware, or may be realized by executing corresponding software by hardware.
  • the apparatus may be the first terminal device described above, or may be set in the first terminal device. As shown in FIG. 20 , the apparatus 2000 may include: a selection module 2010 .
  • a selection module 2010, configured to select a transmission resource from a set of candidate resources, and the selected transmission resource exists in at least P time ranges of the first type, where P is an integer greater than or equal to 1; wherein, the The first type of time range includes the intersection of the DRX activation period and the resource selection period.
  • the DRX activation period is the running period of a DRX activation timer determined according to the DRX configuration. selected time period.
  • the DRX activation period refers to a time period from start to end of a target DRX activation timer determined by the first terminal device according to the DRX configuration
  • the target DRX activation timer is a running period and Any DRX activation timer that overlaps with the resource selection time periods.
  • the resource selection time period includes at least one of the following: a complete time period corresponding to the resource selection window, and a partial time period determined from the resource selection window.
  • the value of P depends on the implementation of the first terminal device, or is configured by a network device, or is pre-configured, or is specified by a standard.
  • the device provided by the above embodiment realizes its functions, it only uses the division of the above-mentioned functional modules as an example for illustration. In practical applications, the above-mentioned function allocation can be completed by different functional modules according to actual needs. That is, the content structure of the device is divided into different functional modules to complete all or part of the functions described above.
  • FIG. 21 shows a schematic structural diagram of a terminal device 210 provided by an embodiment of the present application.
  • the terminal device may be the first terminal device in the above embodiments, and is configured to perform the above method for selecting or excluding resources of the sidelink.
  • the terminal device 210 may include: a processor 211 , a receiver 212 , a transmitter 213 , a memory 214 and a bus 215 .
  • the processor 211 includes one or more processing cores, and the processor 211 executes various functional applications and information processing by running software programs and modules.
  • the receiver 212 and the transmitter 213 can be realized as a transceiver 216, and the transceiver 216 can be a communication chip.
  • the memory 214 is connected to the processor 211 through the bus 215 .
  • the memory 214 may be used to store a computer program, and the processor 211 is used to execute the computer program, so as to implement various steps performed by the first terminal device in the foregoing method embodiments.
  • memory 214 can be realized by any type of volatile or nonvolatile storage device or their combination, and volatile or nonvolatile storage device includes but not limited to: RAM (Random-Access Memory, random access memory) And ROM (Read-Only Memory, read-only memory), EPROM (Erasable Programmable Read-Only Memory, erasable programmable read-only memory), EEPROM (Electrically Erasable Programmable Read-Only Memory, electrically erasable programmable read-only memory memory), flash memory or other solid-state storage technology, CD-ROM (Compact Disc Read-Only Memory, CD-ROM), DVD (Digital Video Disc, high-density digital video disc) or other optical storage, tape cartridges, tapes, disks storage or other magnetic storage devices.
  • RAM Random-Access Memory, random access memory
  • ROM Read-Only Memory, read-only memory
  • EPROM Erasable Programmable Read-Only Memory, erasable programmable read-only memory
  • EEPROM Electrically Eras
  • the processor 211 is configured to select at least N transmission resources within a first time range, where N is an integer greater than or equal to 1; wherein, the first time range includes chain The intersection of the link monitoring time period and the resource selection time period, the link monitoring time period is a time period determined by the first terminal device according to the DRX configuration, and the resource selection time period refers to the time period that the first terminal device performs The time period corresponding to the available resources of the resource selection.
  • the processor 211 is configured to exclude available resources within a resource selection time period to obtain a candidate resource set, and the candidate resources within the second time range in the candidate resource set are The number is greater than or equal to W, and the W is greater than or equal to 0; wherein, the second time range includes the intersection of the DRX activation time period and the resource selection time period, and the DRX activation time period is set by the first terminal.
  • the resource selection time period refers to the time period corresponding to the available resources for resource selection by the first terminal device.
  • the processor 211 is configured to select a transmission resource from a set of candidate resources, and the selected transmission resource exists in at least P time ranges of the first type, where P is An integer greater than or equal to 1; wherein, the first type of time range includes the intersection of the DRX activation period and the resource selection period, and the DRX activation period is a DRX activation timing determined by the first terminal device according to the DRX configuration
  • the resource selection time period refers to the time period corresponding to the available resources for the first terminal device to perform resource selection.
  • An embodiment of the present application also provides a computer-readable storage medium, where a computer program is stored in the storage medium, and the computer program is used to be executed by a processor of a terminal device, so as to implement the above-mentioned sidelink link resource selection method or exclusion methods.
  • the computer-readable storage medium may include: ROM (Read-Only Memory, read-only memory), RAM (Random-Access Memory, random access memory), SSD (Solid State Drives, solid state drive) or an optical disc, etc.
  • the random access memory may include ReRAM (Resistance Random Access Memory, resistive random access memory) and DRAM (Dynamic Random Access Memory, dynamic random access memory).
  • the embodiment of the present application also provides a chip, the chip includes a programmable logic circuit and/or program instructions, and when the chip is run on a terminal device, it is used to implement the resource selection method or exclusion of the above-mentioned sidelink method.
  • the embodiment of the present application also provides a computer program product or computer program, the computer program product or computer program includes computer instructions, the computer instructions are stored in a computer-readable storage medium, and the processor of the terminal device reads from the computer The readable storage medium reads and executes the computer instructions, so as to implement the above method for selecting or excluding resources of the sidelink.
  • the "indication" mentioned in the embodiments of the present application may be a direct indication, may also be an indirect indication, and may also mean that there is an association relationship.
  • a indicates B which can mean that A directly indicates B, for example, B can be obtained through A; it can also indicate that A indirectly indicates B, for example, A indicates C, and B can be obtained through C; it can also indicate that there is an association between A and B relation.
  • the term "corresponding" may indicate that there is a direct or indirect correspondence between the two, or that there is an association between the two, or that it indicates and is indicated, configuration and is configuration etc.
  • the "plurality” mentioned herein means two or more.
  • “And/or” describes the association relationship of associated objects, indicating that there may be three types of relationships, for example, A and/or B may indicate: A exists alone, A and B exist simultaneously, and B exists independently.
  • the character “/” generally indicates that the contextual objects are an "or” relationship.
  • the numbering of the steps described herein only exemplarily shows a possible sequence of execution among the steps.
  • the above-mentioned steps may not be executed according to the order of the numbers, such as two different numbers
  • the steps are executed at the same time, or two steps with different numbers are executed in the reverse order as shown in the illustration, which is not limited in this embodiment of the present application.
  • the functions described in the embodiments of the present application may be implemented by hardware, software, firmware or any combination thereof.
  • the functions may be stored on or transmitted over as one or more instructions or code on a computer-readable medium.
  • Computer-readable media includes both computer storage media and communication media including any medium that facilitates transfer of a computer program from one place to another.
  • a storage media may be any available media that can be accessed by a general purpose or special purpose computer.

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Abstract

本申请公开了一种侧行链路的资源选择方法、装置、设备及存储介质，涉及通信技术领域。所述方法包括：第一终端设备在第一时间范围内选择至少N个传输资源，N为大于或等于1的整数；其中，第一时间范围包括链路监听时间段和资源选择时间段的交集，链路监听时间段是根据DRX配置确定的时间段，资源选择时间段是第一终端设备进行资源选择的时间段。本申请提升了SL通信的可靠性。

Description

侧行链路的资源选择方法、装置、设备及存储介质 技术领域
本申请实施例涉及通信技术领域，特别涉及一种侧行链路的资源选择方法、装置、设备及存储介质。
背景技术
在SL(Sidelink，侧行链路)通信中，终端设备可以通过侦听方式在资源池中选择传输资源。当接收端配置了DRX(Discontinuous Reception，非连续接收)时，发送端在进行资源选择或资源排除时应如何设计，还需进一步研究。
发明内容
本申请实施例提供了一种侧行链路的资源选择方法、装置、设备及存储介质。所述技术方案如下：
根据本申请实施例的一个方面，提供了一种侧行链路的资源选择方法，所述方法由第一终端设备执行，所述方法包括：
在第一时间范围内选择至少N个传输资源，所述N为大于或等于1的整数；
其中，所述第一时间范围包括链路监听时间段和资源选择时间段的交集，所述链路监听时间段是根据DRX配置确定的时间段，所述资源选择时间段是所述第一终端设备进行资源选择的时间段。
根据本申请实施例的一个方面，提供了一种侧行链路的资源排除方法，所述方法由第一终端设备执行，所述方法包括：
对资源选择时间段内的可用资源进行排除，得到候选资源集合，所述候选资源集合中位于第二时间范围内的候选资源的数目大于或等于W，所述W大于或等于0；
其中，所述第二时间范围包括DRX激活时间段和所述资源选择时间段的交集，所述DRX激活时间段是根据DRX配置确定的时间段，所述资源选择时间段是所述第一终端设备进行资源选择的时间段。
根据本申请实施例的一个方面，提供了一种侧行链路的资源选择方法，所述方法由第一终端设备执行，所述方法包括：
从候选资源集合中选择传输资源，所选择的所述传输资源在至少P个第一类时间范围内均存在，所述P为大于或等于1的整数；
其中，所述第一类时间范围包括DRX激活时段和资源选择时间段的交集，所述DRX激活时段是根据DRX配置确定的一个DRX激活定时器的运行时段，所述资源选择时间段是所述第一终端设备进行资源选择的时间段。
根据本申请实施例的一个方面，提供了一种侧行链路的资源选择装置，所述装置包括：
选择模块，用于在第一时间范围内选择至少N个传输资源，所述N为大于或等于1的整数；
其中，所述第一时间范围包括链路监听时间段和资源选择时间段的交集，所述链路监听时间段是根据DRX配置确定的时间段，所述资源选择时间段是第一终端设备进行资源选择的时间段。
根据本申请实施例的一个方面，提供了一种侧行链路的资源排除装置，所述装置包括：
排除模块，用于对资源选择时间段内的可用资源进行排除，得到候选资源集合，所述候选资源集合中位于第二时间范围内的候选资源的数目大于或等于W，所述W大于或等于0；
其中，所述第二时间范围包括DRX激活时间段和所述资源选择时间段的交集，所述DRX激活时间段是根据DRX配置确定的时间段，所述资源选择时间段是第一终端设备进行资源选择的时间段。
根据本申请实施例的一个方面，提供了一种侧行链路的资源选择装置，所述装置包括：
选择模块，用于从候选资源集合中选择传输资源，所选择的所述传输资源在至少P个第一类时间范围内均存在，所述P为大于或等于1的整数；
其中，所述第一类时间范围包括DRX激活时段和资源选择时间段的交集，所述DRX激活时段是根据DRX配置确定的一个DRX激活定时器的运行时段，所述资源选择时间段是第一终端设备进行资源选择的时间段。
根据本申请实施例的一个方面，提供了一种终端设备，所述终端设备包括处理器和存储器，所述存储器中存储有计算机程序，所述处理器执行所述计算机程序以实现上述任一方面所述的方法。
根据本申请实施例的一个方面，提供了一种计算机可读存储介质，所述存储介质中存储有计算机程序，所述计算机程序用于被处理器执行，以实现上述任一方面所述的方法。
根据本申请实施例的一个方面，提供了一种芯片，所述芯片包括可编程逻辑电路和/或程序指令，当所 述芯片运行时，用于实现上述任一方面所述的方法。
根据本申请实施例的一个方面，提供了一种计算机程序产品或计算机程序，所述计算机程序产品或计算机程序包括计算机指令，所述计算机指令存储在计算机可读存储介质中，处理器从所述计算机可读存储介质读取并执行所述计算机指令，以实现上述任一方面所述的方法。
本申请实施例提供的技术方案可以包括如下有益效果：
在SL通信场景下，通过保证发送端在第一时间范围内选择至少N个传输资源，该第一时间范围包括接收端的链路监听时间段和发送端的资源选择时间段的交集，从而增加了发送端在上述链路监听时间段内的传输次数，保证接收端能够更高概率地接收到发送端的传输，从而提升通信可靠性。
另外，在SL通信场景下，通过保证DRX激活时间段内有足够的候选资源，进而保证发送端能够在DRX激活时间段内选择足够数量的资源，使接收端能够在激活状态下接收多次传输，提升通信可靠性。
另外，在SL通信场景下，通过保证发送端在至少P个DRX激活时段中均存在已选资源，使得接收端即使因丢包没有启动定时器而进入睡眠状态，也可能在接下来的DRX激活时段内依旧收到同一数据的重传，提升通信可靠性。
附图说明
图1是本申请一个实施例提供的网络架构的示意图；
图2示例性示出了SL通信的物理层结构的示意图；
图3示例性示出了时频资源位置预留的示意图；
图4示例性示出了全部侦听和资源选择的示意图；
图5示例性示出了部分侦听的资源选择的示意图；
图6示例性示出了DRX周期和DRX激活时段的示意图；
图7示例性示出了各DRX定时器对应时段的示意图；
图8示例性示出了选择的传输资源和各DRX定时器对应时段间关系的示意图；
图9是本申请一个实施例提供的侧行链路的资源选择方法的流程图；
图10示例性示出了全部侦听场景下资源选择的示意图；
图11示例性示出了部分侦听场景下资源选择的示意图；
图12是本申请一个实施例提供的侧行链路的资源排除方法的流程图；
图13示例性示出了全部侦听场景下资源排除的示意图；
图14示例性示出了部分侦听场景下资源排除的示意图；
图15是本申请另一个实施例提供的侧行链路的资源选择方法的流程图；
图16示例性示出了全部侦听场景下选择传输资源的示意图；
图17示例性示出了部分侦听场景下选择传输资源的示意图；
图18是本申请一个实施例提供的侧行链路的资源选择装置的框图；
图19是本申请一个实施例提供的侧行链路的资源排除装置的框图；
图20是本申请另一个实施例提供的侧行链路的资源选择装置的框图；
图21是本申请一个实施例提供的终端设备的结构示意图。
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。
本申请实施例描述的网络架构以及业务场景是为了更加清楚地说明本申请实施例的技术方案，并不构成对本申请实施例提供的技术方案的限定，本领域普通技术人员可知，随着网络架构的演变和新业务场景的出现，本申请实施例提供的技术方案对于类似的技术问题，同样适用。
请参考图1，其示出了本申请一个实施例提供的网络架构的示意图。该网络架构可以包括：核心网11、接入网12和终端设备13。
核心网11中包括若干核心网设备。核心网设备的功能主要是提供用户连接、对用户的管理以及对业务完成承载，作为承载网络提供到外部网络的接口。例如，5G(5th Generation，第五代移动通信技术)NR(New Radio，新空口)系统的核心网中可以包括AMF(Access and Mobility Management Function，接入和移动性管理功能)实体、UPF(User Plane Function，用户平面功能)实体和SMF(Session Management Function，会话管理功能)实体等设备。
接入网12中包括若干接入网设备14。5G NR系统中的接入网可以称为NG-RAN(New Generation-Radio Access Network，新一代无线接入网)。接入网设备14是一种部署在接入网12中用以为终端设备13提供无线通信功能的装置。接入网设备14可以包括各种形式的宏基站，微基站，中继站，接入点等等。在采 用不同的无线接入技术的系统中，具备接入网设备功能的设备的名称可能会有所不同，例如在5G NR系统中，称为gNodeB或者gNB。随着通信技术的演进，“接入网设备”这一名称可能会变化。为方便描述，本公开实施例中，上述为终端设备13提供无线通信功能的装置统称为接入网设备。
终端设备13的数量通常为多个，每一个接入网设备14所管理的小区内可以分布一个或多个终端设备13。终端设备13可以包括各种具有无线通信功能的手持设备、车载设备、可穿戴设备、计算设备或连接到无线调制解调器的其他处理设备，以及各种形式的用户设备、移动台(Mobile Station，MS)等等。为方便描述，上面提到的设备统称为终端设备。接入网设备14与核心网设备之间通过某种空中技术相互通信，例如5G NR系统中的NG接口。接入网设备14与终端设备13之间通过某种空中技术互相通信，例如Uu接口。
终端设备13和终端设备13(例如车载设备与其它设备(如其它车载设备、手机、RSU(Road Side Unit，路测单元)等))之间可以通过直连通信接口(如PC5接口)互相通信，相应地，该基于直连通信接口建立的通信链路可以称为直连链路或SL。SL传输即为终端设备与终端设备之间通过侧行链路直接进行通信数据传输，不同于传统的蜂窝系统中通信数据通过接入网设备接收或者发送，SL传输具有时延短、开销小等特点，适合用于地理位置接近的两个终端设备(如车载设备和地理位置接近的其它周边设备)之间的通信。需要说明的是，在图1中，仅以V2X(vehicle to everything，车联网)场景下的车对车通信为示例，SL技术可以应用于各种终端设备之间直接进行通信的场景。或者说，本申请中的终端设备是指任意一种利用SL技术通信的设备。
本公开实施例中的“5G NR系统”也可以称为5G系统或者NR系统，但本领域技术人员可以理解其含义。本公开实施例描述的技术方案可以适用于5G NR系统，也可以适用于5G NR系统后续的演进系统。
关于SL传输，3GPP定义了两种传输模式：模式A和模式B。
模式A：终端设备的传输资源是由接入网设备(如基站)分配的，终端设备根据接入网设备分配的传输资源在侧行链路上进行通信数据的传输，其中，接入网设备既可以为终端设备分配单次传输的传输资源，也可以为终端设备分配半静态传输的传输资源。
模式B：终端设备自行在资源池中选取传输资源进行通信数据的传输。具体地，终端设备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。
接下来主要介绍NR V2X系统中SL通信，终端设备自主进行资源选择的方法(也即上述模式B)。
NR V2X系统中SL通信的物理层结构如图2所示。PSCCH(Physical Sidelink Control Channel，物理侧行控制信道)用于承载第一侧行控制信息，PSSCH(Physical Sidelink Shared Channel，物理侧行共享信道)用于承载数据和第二侧行控制信息。PSCCH和PSSCH在同一时隙中发送。上述第一侧行控制信息和第二侧行控制信息可以是两个具有不同作用的侧行控制信息。例如，第一侧行控制信息承载在PSCCH中，主要包含资源侦听相关的域，方便其他终端设备解码后进行资源排除与资源选择。在PSSCH中，除了数据外，还承载第二侧行控制信息，第二侧行控制信息主要包括数据解调相关的域，方便其他终端设备解调该PSSCH中的数据。
在NR V2X系统中，上述模式B下，终端设备自行选择传输资源来发送数据。资源预留则是资源选择的前提。
资源预留是指终端设备在PSCCH中发送第一侧行控制信息预留接下来要使用的资源。在NR V2X系统中，支持TB(Transport Block，传输块)内的资源预留也支持TB间的资源预留。
如图3所示，终端设备发送第一侧行控制信息，利用其中“Time resource assignment(时间资源分配)”和“Frequency resource assignment(频率资源分配)”域指示当前TB的N个时频资源(包括当前发送所用的资源)。其中N≤Nmax，在NR V2X中，Nmax等于2或3。同时，上述N个被指示的时频资源应分布在W个时隙内。在NR V2X中，W等于32。例如，图3所示的TB1中，终端设备在PSSCH发送初传数据的同时在PSCCH中发送第一侧行控制信息，利用上述两个域指示初传和重传1的时频资源位置(即此时N＝2)，即预留重传1的时频资源。并且，初传和重传1在时域上分布在32个时隙内。同理，在图3所示的TB1中，终端设备利用重传1的PSCCH中发送的第一侧行控制信息指示重传1和重传2的时频资源位置，重传1与重传2在时域上分布在32个时隙内。
同时，终端设备发送第一侧行控制信息时利用“Resource reservation period(资源预留周期)”域进行TB间的资源预留。例如图3中，终端设备在发送TB1的初传的第一侧行控制信息时，利用“Time resource assignment”和“Frequency resource assignment”域指示TB1初传和重传1的时频资源位置，记为{(t 1,f 1),(t 2,f 2)}。其中t 1、t 2代表TB1初传和重传1资源的时域位置，f 1、f 2代表相应的频域位置。如果该第一侧行控制信息中，“Resource reservation period”域的取值为100毫秒，则该SCI(Sidelink Control Information，侧行链路控制信息)同时指示了时频资源{(t 1+100,f 1),(t 2+100,f 2)}，这两个资源用于TB2初传和重传1的传输。同理，在TB1重传1中发送的第一侧行控制信息，也利用“Resource reservation period”域预留了TB2重传1和重传2的时频资源。在NR V2X中，“Resource reservation period”域可能的取值为0、1-99、100、200、 300、400、500、600、700、800、900、1000毫秒，相比较LTE(Long Term Evaluation，长期演进)V2X更为灵活。但在每个资源池中，只配置了其中的e种取值，终端设备根据所用的资源池确定可能使用的值。记资源池配置中的e种取值为资源预留周期集合M，示例性地，e小于等于16。
此外，通过网络配置或预配置，上述TB间的预留可以以资源池为单位激活或去激活。当激活TB间的预留时，第一侧行控制信息中包括“Resource reservation period”域。当去激活TB间的预留时，第一侧行控制信息中不包括“Resource reservation period”域。在激活TB间的预留时，一般情况下，在触发资源重选之前，终端设备所用的“Resource reservation period”域的取值，即资源预留周期都不会变，终端设备每发送一次第一侧行控制信息，都利用其中的“Resource reservation period”域预留下个周期的资源，用于另一个TB的传输，从而达到周期性地半持续传输。
当终端设备工作在上述模式B下，终端设备可以通过侦听其他终端设备发送的PSCCH，获取其他终端设备发送的第一侧行控制信息，从而得知其他终端设备所预留的资源。终端设备在进行资源选择时，会排除其他终端设备预留的资源，从而避免资源碰撞。
在NR V2X系统中，上述模式B下，终端设备需要自行选择资源。
如图4所示，终端设备在时隙n触发资源选择或重选或时隙n是高层触发物理层上报候选资源集合的时隙，资源选择窗从n+T 1开始，到n+T 2结束。0<＝T 1<＝T proc,1，当子载波间隔是15，30，60，120kHz时，T proc,1为3，5，9，17个时隙。T 2min<＝T 2<＝业务的剩余时延预算，T 2min的取值集合为{1,5,10,20}*2 μ个时隙，其中μ＝0,1,2,3对应于子载波间隔是15，30，60，120kHz的情况，终端设备根据自身待发送数据的优先级从该取值集合中确定T 2min。例如当子载波间隔是15kHz时，终端设备根据自身待发送数据的优先级从集合{1,5,10,20}中确定T 2min。当T 2min大于等于业务的剩余时延预算时，T 2等于业务的剩余时延预算。剩余时延预算即数据的时延要求的对应时刻与当前时刻的差值。例如时隙n到达的数据包，时延要求为50毫秒，假设一个时隙为1毫秒，如果当前时刻为时隙n，则剩余时延预算为50毫秒，若当前时刻为时隙n+20，则剩余时延预算为30毫秒。
终端设备在n-T 0到n-T proc,0进行资源侦听(不包括n-T proc,0)，T 0的取值为100或1100毫秒。当子载波间隔是15，30，60，120kHz时，T proc,0为1，1，2，4个时隙。实际上，终端设备在每个时隙(除了自己的发送时隙)都会侦听其他终端设备发送的第一侧行控制信息，当时隙n触发资源选择或重选后，终端设备使用n-T 0到n-T proc,0资源侦听的结果。
Step 1：终端设备将资源选择窗内所有属于终端设备所用资源池的可用资源作为资源集合A，集合A中的任意一个资源记为R(x,y)，x和y分别指示资源的频域位置和时域位置。记集合A中资源的初始数量为M total。终端设备根据资源侦听窗内的未侦听时隙(Step 1-1)和/或资源侦听窗内的资源侦听结果(Step 1-2)对资源集合A中的资源进行排除。终端设备判断资源R(x,y)或与资源R(x,y)对应的一系列周期性资源是否与Step 1-1中根据未侦听时隙确定的时隙或Step 1-2中根据侦听到的第一侧行控制信息确定的资源重叠，若重叠则从资源集合A中排除资源R(x,y)。
Step 1-1：如果终端设备在侦听窗内时隙m发送数据，没有进行侦听，则终端设备将根据时隙m和终端设备所用资源池中每一种允许的资源预留周期，以该资源预留周期为间隔，确定对应的Q个时隙。若该Q个时隙与资源R(x,y)或与资源R(x,y)对应的一系列周期性资源重叠，则从资源集合A中排除资源R(x,y)。上述Q＝1或者
Figure PCTCN2021100651-appb-000001
(代表向上取整)。T scal等于T 2转化为毫秒后的值。P rx为终端设备所用资源池允许的资源预留周期的一种。
例如图4中的子图(a)，终端设备在时隙m没有进行侦听，依次根据所用资源池配置中的资源预留周期集合M中每一种资源预留周期进行资源排除，对于其中某个资源预留周期1，假定Q值计算为2，则对应的Q个时隙为图4子图(a)中从时隙m映射的以资源预留周期1为间隔接下来的2个以横线阴影标识的时隙。对于其中某个资源预留周期2，假定Q值计算Q＝1，则对应的Q个时隙为图4子图(a)中从时隙m映射的以资源预留周期2为间隔的接下来的1个点状阴影标识的时隙。
终端设备将判断每一种预留周期对应的Q个时隙，是否与资源R(x,y)或与资源R(x,y)对应的一系列周期性资源重叠，若重叠则从资源集合A中排除资源R(x,y)。
可选地，当终端设备所用资源池去激活TB间的预留时，终端设备可以不执行上述Step 1-1。
可选地，当终端设备执行完Step 1-1后，如果资源集合A中剩余资源数目小于M total*X，则终端设备将资源集合A初始化为资源选择窗内所有属于终端设备所用资源池的可用资源，再执行Step 1-2。
Step 1-2：如果终端设备在资源侦听窗的时隙m内侦听到PSCCH中传输的第一侧行控制信息，测量该PSCCH的SL-RSRP(Sidelink Reference Signal Received Power，侧行参考信号接收功率)或者该PSCCH调度的PSSCH的SL-RSRP(即与该PSCCH在同一时隙中发送的PSSCH的SL-RSRP)。
如果测量的SL-RSRP大于SL-RSRP阈值，且终端设备所用资源池激活TB间的资源预留，则终端设备将根据时隙m和侦听到的第一侧行控制信息中携带的资源预留周期，以该资源预留周期为间隔，确定对应的Q个时隙。终端设备假定在该Q个时隙中也收到了相同内容的第一侧行控制信息。终端设备将判断 在时隙m收到的第一侧行控制信息和这些假定收到的Q个第一侧行控制信息的“Time resource assignment”和“Frequency resource assignment”域指示的资源与资源R(x,y)或与资源R(x,y)对应的一系列周期性资源是否重叠，若重叠则从集合A中排除对应资源R(x,y)。上述Q＝1或者
Figure PCTCN2021100651-appb-000002
(代表向上取整)。T scal等于T 2转化为毫秒后的值。P rx为侦听到的第一侧行控制信息中携带的资源预留周期。
例如图4中的子图(b)，当终端设备所用资源池激活TB间的预留，如果终端设备在时隙m资源E(v,m)上侦听到PSCCH中的第一侧行控制信息，该第一侧行控制信息中的资源预留周期为P rx，假定Q值计算为1，终端设备将假定在时隙m+P rx上也收到了相同内容的第一侧行控制信息。终端设备将判断在时隙m收到的第一侧行控制信息和假定在时隙m+P rx收到的第一侧行控制信息的“Time resource assignment”和“Frequency resource assignment”域指示的资源1、2、3、4、5、6与资源R(x,y)或与资源R(x,y)对应的一系列周期性资源是否重叠，若重叠且满足RSRP条件则从资源集合A中排除资源R(x,y)。
如果终端设备测量的SL-RSRP大于SL-RSRP阈值，且终端设备所用资源池去激活TB间的资源预留，则终端设备只判断在时隙m收到的第一侧行控制信息的“Time resource assignment”与“Frequency resource assignment”域指示的资源是否与资源R(x,y)或与资源R(x,y)对应的一系列资源重叠，若重叠则从资源集合A中排除资源R(x,y)。
例如图4中的子图(b)，当终端设备所用资源池去激活TB间的预留，如果终端设备在时隙m资源E(v,m)上侦听到PSCCH中的第一侧行控制信息，则终端设备判断该第一侧行控制信息中“Time resource assignment”和“Frequency resource assignment”域指示的资源1、2、3与资源R(x,y)或与资源R(x,y)对应的一系列周期性资源是否重叠，若重叠且满足RSRP条件则从资源集合A中排除资源R(x,y)。
如果在上述资源排除后资源集合A中剩余资源不足M total*X，则将SL-RSRP阈值抬升3dB，重新执行Step 1。物理层将资源排除后的资源集合A作为候选资源集合上报给高层。
Step 2：高层从上报的候选资源集合中随机选择资源发送数据。即终端设备从候选资源集合中随机选择资源发送数据。
需要注意的是：
1.上述RSRP阈值是由终端设备侦听到的PSCCH中携带的优先级P1和终端设备待发送数据的优先级P2决定的。终端设备所用资源池的配置中包含一张SL-RSRP阈值表，该SL-RSRP阈值表包含了所有优先级组合对应的SL-RSRP阈值。资源池的配置可以是网络配置或者预配置的。
例如，如表1所示，假设P1与P2的优先级等级可选值均为0-7，则不同优先级组合对应的SL-RSRP阈值用γ ij表示，其中，γ ij中的i为优先级等级P1的取值，j为优先级等级P2的取值。
表1 SL-RSRP阈值表
Figure PCTCN2021100651-appb-000003
当终端设备侦听到其他终端设备发送的PSCCH，获取该PSCCH中传输的第一侧行控制信息中携带的优先级P1以及待发送数据的优先级P2，终端设备通过查表1的方式确定SL-RSRP阈值。
2.终端设备利用测量到的PSCCH-RSRP还是该PSCCH调度的PSSCH-RSRP与SL-RSRP阈值进行比较，取决于终端设备所用资源池的资源池配置。资源池的配置可以是网络配置或者预配置的。
3.上述X，X可能的取值为{20％,35％,50％}。终端设备所用资源池的配置中包含优先级与上述可能取值的对应关系，终端设备根据待发送数据的优先级及该对应关系，确定X的值。资源池配置可以是由网络配置或者预配置。
上述介绍为NR-V2X中的一种SL通信方式，即终端设备通过资源侦听自主选取传输资源，自行在侧行链路上进行数据传输。该SL通信的方式也可应用在手持终端与手持终端间的直接通信，行人与车辆间的直接通信等各种SL通信中。
上述介绍的终端设备通过资源侦听自主选取传输资源的方式并未考虑到节约功耗，部分侦听的资源选择方法就是针对例如手持终端这种功耗敏感的终端设计的节能省电的资源选择方式，其主要通过限制进行资源选择的时间单元数目与进行资源侦听的时间单元数目，以达到节能省电的目的。
接下来结合图5说明一种用于SL通信的部分侦听的资源选择方法。终端设备根据在资源选择窗内确定的至少Y个时隙以及资源池配置中的资源预留周期集合M或M的子集，确定在资源侦听窗内应侦听的 时隙。在进行资源选择时，至少根据上述在资源侦听窗内确定的时隙中的侦听结果和/或未侦听时隙，对上述至少Y个时隙内的资源进行排除，示例性地，具体排除过程可以参见上述Step 1，从其中未排除的资源里选择资源发送数据。
例如图5中，假定终端设备在资源选择窗内确定了t 1到t y共Y个时隙，其所用资源池配置中的资源预留周期集合M包括周期P 1、P 2和P 3。终端设备根据集合M中的每一种资源预留周期和Y个时隙，确定出资源侦听窗中的侦听时隙为t 1-P 1到t y-P 1、t 1-P 2到t y-P 2以及t 1-P 3到t y-P 3。即根据该Y个时隙和每一种资源预留周期，确定出属于资源侦听窗的最近一个周期的对应时隙。终端设备在时隙n进行资源选择或重选时，将至少根据上述资源侦听窗内确定的时隙内的侦听结果和/或未侦听时隙，排除上述Y个时隙中的资源，例如根据Step 1进行排除，并最终从该Y个时隙中的剩余资源中选择资源发送数据。
可选地，在上述确定的侦听时隙外，终端设备还可以进行[n+T A，n+T B]的持续性侦听，例如T B＝0，T A＝-32个时隙，根据确定的侦听时隙和[n+T A，n+T B]内的侦听结果和/或未侦听时隙，对上述Y个时隙内的资源进行排除，得到候选资源集合，从候选资源集合中选择传输资源。
可选地，上述部分侦听的机制适用于周期性的传输，根据周期预测出时隙n的位置，进而确定资源选择窗与侦听窗，从中确定至少Y个时隙，再根据至少Y个时隙确定对应的侦听时隙，当时间进行到侦听时隙时进行侦听，当时间进行到时隙n时触发资源选择或重选，从至少Y个时隙内选择传输资源。
可选地，上述至少Y个时隙可以为连续的时隙，也可以为非连续的时隙。
DRX是上下行系统中所使用的节能省电方法，目前也正在讨论基于SL的DRX机制。终端设备根据网络配置或预配置或其他终端配置的DRX周期(DRX Cycle)检测PSCCH和/或PSSCH。终端设备在DRX周期中DRX激活时段(也即On duration时间段)内检测PSCCH和/或PSSCH(可以称为active状态(监听状态/激活状态))，在DRX周期中的剩余时间段内如果没有激活其他令终端设备进入active状态的计时器则可以进入休眠状态，DRX周期是周期性的，例如图6所示。
终端设备至少根据DRX配置中的sl-drx-Cycle、sl-drx-StartOffset、sl-drx-onDurationTimer和sl-drx-SlotOffset确定一个基本的DRX周期和其中的On duration时间段。例如，根据DRX配置中的sl-drx-Cycle确定DRX周期的长度，根据DRX配置中的sl-drx-StartOffset、sl-drx-Cycle和sl-drx-SlotOffset参数确定DRX周期的起始位置，On duration时间段的起始位置与DRX周期的起始位置保持一致，而On duration时间段的长度由sl-drx-onDurationTimer指示。实际上，终端设备在On duration时间段的起始位置启动On duration timer(本申请中是指DRX激活定时器)，进入active状态检测PSCCH和/或PSSCH，当On duration timer到0时，如果没有启动使终端设备进入active状态的计时器，则终端设备可以进入休眠状态节能省电。
在上述DRX周期和On duration时间段的基础上，至少对于单播，还引入了Inactivity timer(本申请中是指DRX非激活定时器)、HARQ(Hybrid Automatic Repeat reQuest，混合自动重传请求)RTT(Round-Trip Time，往返时间)timer(本申请中是指HARQ RTT定时器)和Retransmission timer(本申请中是指DRX重传定时器)三种定时器。
例如图7，当终端设备在On duration timer未到0，即On duration时间段内，检测到新数据或新TB或新MAC(Media Access Control，媒体接入控制)PDU(Protocol Data Unit，协议数据单元)或初传后，启动Inactivity timer，在Inactivity timer对应的时间段内检测PSCCH和/或PSSCH。在Inactivity timer减到0之前，又检测到同一数据的重传，即重传1。则终端设备确定重传1对应的PSFCH(Physical Sidelink Feedback Channel，物理侧行反馈信道)所在的时隙或符号。可选地，终端设备可以根据重传1的时域位置结合映射关系，确定出重传1对应的PSFCH所在的时隙或符号。终端设备在该PSFCH时隙或符号向发送重传1的终端反馈ACK(Acknowledgement，肯定确认)或NACK(Negative Acknowledgement，否定确认)。可选地，在重传1与重传1对应的PSFCH之间的时间段，如果没有任何使终端设备进入active状态的计时器，则终端设备可以休眠。
终端设备在重传1对应的PSFCH所在时隙或符号后启动HARQ RTT timer，在HARQ RTT timer对应的时间范围内，终端设备进入休眠状态，此时终端设备假定发送重传1的终端在该时间段内执行准备重传数据等操作。当HARQ RTT timer减为0时或减为0后，终端设备启动Retransmission timer，在重传范围内检测PSCCH和/或PSSCH，即检测可能的重传。终端设备在Retransmission timer减到0之前，检测到同一数据的重传，即重传2。则终端设备再次确定重传2对应的PSFCH时隙或符号，再次启动HARQ RTT timer以及Retransmission timer，如果没有检测到重传，则终端设备进入休眠状态。并在下一个On duration时间段起始位置启动On duration timer，进入active状态。
可选地，终端设备在接收初传后，也确定初传的PSFCH，启动HARQ RTT timer，当HARQ RTT timer减为0时或减为0后，则启动Retransmission timer，在Retransmission timer对应的时间段内检测PSCCH和/或PSSCH。
对于某一个时间点，如果On duration timer或Inactivity timer或Retransmission timer在运行，则终端设 备需检测PSCCH和/或PSSCH。
综上，Inactivity timer的作用在于，终端设备在接收新数据后，保证在一定时间范围内继续检测PSCCH和/或PSSCH。HARQ RTT timer的作用在于，终端设备在发送数据的终端进行数据处理时短暂休眠。Retransmission timer的主要目的在于检测相应的重传。这三种定时器可以分别配置使用，也可以同时配置使用，图7即为同时使用的一个示例。
可选地，当Retransmission timer不与HARQ RTT timer同时使用时，其在接收到PSCCH和/或PSSCH后立即启动。
目前标准还未讨论，当接收端配置了DRX时，发送端在进行资源选择或资源排除时应如何设计，可能的设计例如增加某些资源排除或资源选择在时域上的限制条件。
例如图8中，如果发送端将初传选择在On duration时间段内，将重传1选择在(初传的时域位置，初传的时域位置加Inactivity timer的时长]的范围内，将重传2选择在(重传1对应的PSFCH所在时隙或符号加HARQ RTT timer的时长，重传1对应的PSFCH所在时隙或符号加HARQ RTT timer的时长加Retransmission timer的时长]的范围内，就可以保证接收端能够检测到初传、重传1和重传2。
然而，这种资源选择的方式风险较大，比如图8中如果接收端没有检测到初传，则不会激活Inactivity timer，在On duration时间段结束后就进入休眠状态，则也无法检测到重传1和重传2，导致该数据传输失败。又比如，假设接收端成功接收了初传，但如果接收端在(初传的时域位置，初传的时域位置加Inactivity timer的时长]内没有检测到重传1，导致接收端不激活Retransmission timer，在Inactivity timer减到0时或减到0后，接收端进入休眠状态，由于接收端只接收到了发送端的初传，通信可靠性降低。
上述问题的共性在于，配置了DRX的接收端，由于没有在特定计时器(On duration timer或Inactivity timer或Retransmission timer)时间范围内检测到发送端的传输而过早地休眠，从而失去了接收更多传输的机会，导致通信可靠性降低。本申请针对该问题提出优化方案。
下面，将通过几个示例性实施例对本申请技术方案进行介绍说明。另外，在对本申请技术方案进行介绍说明之前，先作如下说明：本文中提及的“DRX激活时段”是指上文介绍的On duration时间段，该On duration时间段也可以称为持续监听时间段或者其他名称，本申请对此不作限定。本文中提及的“DRX激活定时器”是指上文介绍的On duration timer，该On duration timer也可以称为持续监听定时器或者其他名称，本申请对此不作限定。本文中提及的“DRX非激活定时器”是指上文介绍的Inactivity timer。本文中提及的“DRX重传定时器”是指上文介绍的Retransmission timer。
请参考图9，其示出了本申请一个实施例提供的侧行链路的资源选择方法的流程图。该方法可应用于图1所示的网络架构中，例如该方法可以由任意一个终端设备执行。该方法可以包括如下步骤：
步骤910，第一终端设备在第一时间范围内选择至少N个传输资源，N为大于或等于1的整数；其中，第一时间范围包括链路监听时间段和资源选择时间段的交集，链路监听时间段是根据DRX配置确定的时间段，资源选择时间段是第一终端设备进行资源选择的时间段。
第一终端设备可以是任意一个终端设备，例如该第一终端设备可以作为SL通信的发送端，在向接收端发送数据之前，先采用本实施例介绍的方法选择传输资源，然后使用该选择的传输资源发送数据。可选地，第一终端设备可以与一个其他终端设备进行SL通信，也可以与多个其他终端设备进行SL通信，因此接收端可以是一个终端设备，也可以是多个终端设备。在本实施例中，为了便于说明，将接收端的终端设备称为第二终端设备，应当理解的是，第二终端设备的数量可以是一个，也可以是多个。
链路监听时间段是根据DRX配置确定的时间段。例如，链路监听时间段是由第一终端设备根据DRX配置确定的时间段。在一个示例中，链路监听时间段是指配置了DRX的第二终端设备监听侧行链路的时间段。第一终端设备可以根据DRX配置确定该链路监听时间段，该DRX配置可以是专门针对于某一个第二终端设备的DRX配置，也可以是针对多个第二终端设备所共有的DRX配置。可选地，该DRX配置可以由网络设备配置，或预配置，或标准规定，或其他终端设备(如第二终端设备)指示给第一终端设备，或取决于第一终端设备的实现。
可选地，链路监听时间段包括以下至少一种：DRX激活时段、DRX激活定时器的运行时段、DRX非激活定时器的运行时段、DRX重传定时器的运行时段。DRX激活时段等同于DRX激活定时器的运行时段，是DRX周期中的一部分时间段，第二终端设备在该DRX激活时段/DRX激活定时器的运行时段内处于active状态，检测PSCCH和/或PSSCH。第二终端设备在接收到初传数据(或者说，新数据或新TB或新MAC PDU)之后，可以启动DRX非激活定时器，在该DRX非激活定时器的运行时段内，第二终端设备继续检测PSCCH和/或PSSCH。第二终端设备在接收到初传数据或重传数据之后，可以启动DRX重传定时器，在该DRX重传定时器的运行时段内，第二终端设备继续检测PSCCH和/或PSSCH。
可选地，资源选择时间段包括以下至少一种：资源选择窗对应的完整时间段、从资源选择窗中确定的 部分时间段。如果第一终端设备进行全部侦听(full sensing)(或者说，如果第一终端设备不进行部分侦听(partial sensing)，或在默认情况下)，那么资源选择时间段是资源选择窗对应的完整时间段。如果第一终端设备进行部分侦听(partial sensing)，那么资源选择时间段是从资源选择窗中确定的部分时间段，例如该资源选择时间段包括第一终端设备在资源选择窗内确定的至少Y个时隙，该至少Y个时隙在时域上可以是连续的，也可以是非连续的。
在示例性实施例中，第一时间范围可以为以下任意一种情况：
情况1：DRX激活时段或DRX激活定时器的运行时段，与资源选择窗在时域上的交集；
情况2：DRX激活时段或DRX激活定时器的运行时段，与第一终端设备从资源选择窗中确定的部分时间段(如至少Y个时隙)在时域上的交集；
情况3：DRX非激活定时器的运行时段，与资源选择窗在时域上的交集；
情况4：DRX非激活定时器的运行时段，与第一终端设备从资源选择窗中确定的部分时间段(如至少Y个时隙)在时域上的交集；
情况5：DRX重传定时器的运行时段，与资源选择窗在时域上的交集；
情况6：DRX重传定时器的运行时段，与第一终端设备从资源选择窗中确定的部分时间段(如至少Y个时隙)在时域上的交集。
可选地，上述DRX激活时段或DRX激活定时器的运行时段，是指第一终端设备根据DRX配置确定的一个或多个目标DRX激活定时器从启动到结束的时间段。可选地，目标DRX激活定时器从至少一个候选DRX激活定时器中确定，该候选DRX激活定时器是运行时段与资源选择时间段存在交集的DRX激活定时器。
示例性地，上述一个或多个目标DRX激活定时器包括：全部的候选DRX激活定时器。
示例性地，上述一个或多个目标DRX激活定时器包括：上述至少一个候选DRX激活定时器中，时域位置靠前的H个候选DRX激活定时器，H为正整数。H的取值由网络设备配置，或预配置，或标准规定，或其他终端设备(如第二终端设备)指示给第一终端设备，或取决于第一终端设备的实现。在一个示例中，DRX激活时段或DRX激活定时器的运行时段是指第一终端设备根据DRX配置确定的一个目标DRX激活定时器从启动到结束的时间段，且该一个目标DRX激活定时器是上述至少一个候选DRX激活定时器中，时域位置最靠前的一个候选DRX激活定时器。该示例可以看作是H等于1的特例。
示例性地，上述一个或多个目标DRX激活定时器包括：上述至少一个候选DRX激活定时器中，与资源选择时间段的交集时长最大的候选DRX激活定时器。在一个示例中，DRX激活时段或DRX激活定时器的运行时段是指第一终端设备根据DRX配置确定的一个目标DRX激活定时器从启动到结束的时间段，且该一个目标DRX激活定时器是上述至少一个候选DRX激活定时器中，与资源选择时间段的交集时长最大的候选DRX激活定时器。可选地，如果与资源选择时间段的交集时长最大的候选DRX激活定时器的数量为1个，那么这1个候选DRX激活定时器即为目标DRX激活定时器；如果与资源选择时间段的交集时长最大的候选DRX激活定时器的数量为多个，那么从该多个候选DRX激活定时器中确定出一个候选DRX激活定时器作为目标DRX激活定时器，比如从该多个候选DRX激活定时器中随机选择一个候选DRX激活定时器作为目标DRX激活定时器，或者将该多个候选DRX激活定时器中时域位置最靠前的一个候选DRX激活定时器作为目标DRX激活定时器。
可选地，上述DRX非激活定时器的运行时段，是指第一终端设备根据DRX非激活定时器的时长和选择的初始传输资源的时域位置，确定的DRX非激活定时器从启动到结束的时间段。例如，DRX非激活定时器的运行时段为(t 1，t 1+t 2]或(t 1，t 1+t 2)，其中，t 1为初始传输资源的时域位置，t 2为DRX非激活定时器的时长。另外，上述DRX非激活定时器的时长(也即t 2的取值)由网络设备配置，或预配置，或标准规定，或其他终端设备(如第二终端设备)指示给第一终端设备，或取决于第一终端设备的实现。
可选地，上述DRX重传定时器的运行时段，是指第一终端设备根据DRX重传定时器的时长和选择的目标传输资源的时域位置，确定的目标传输资源对应的DRX重传定时器从启动到结束的时间段。例如，DRX重传定时器的运行时段为(t 3，t 3+t 4]或(t 3，t 3+t 4)，其中，t 3为目标传输资源的时域位置，t 4为DRX重传定时器的时长。
或者，上述DRX重传定时器的运行时段，是指第一终端设备根据HARQ RTT定时器的时长、DRX重传定时器的时长和选择的目标传输资源的时域位置，确定的目标传输资源对应的DRX重传定时器从启动到结束的时间段。例如，DRX重传定时器的运行时段为(t 5+t 6，t 5+t 6+t 4]或(t 5+t 6，t 5+t 6+t 4)，其中，t 5为目标传输资源对应的PSFCH资源所对应的时域位置，t 6为HARQ RTT定时器的时长，t 4为DRX重传定时器的时长。
需要说明的是，上述目标传输资源可以是第一终端设备选择的任意一个传输资源，如目标传输资源可以是初始传输资源(简称初传资源)，也可以是任意一个重复传输资源(简称重传资源)。另外，上述DRX重传定时器的时长(也即t 4的取值)由网络设备配置，或预配置，或标准规定，或其他终端设备(如第二终端设备)指示给第一终端设备，或取决于第一终端设备的实现。上述HARQ RTT定时器的时长(也即t 6的取值)由网络设备配置，或预配置，或标准规定，或其他终端设备(如第二终端设备)指示给第一终端设备，或取决于第一终端设备的实现。
可选地，上述DRX非激活定时器的时长、DRX重传定时器的时长、HARQ RTT定时器的时长为配置的时长或指示的时长，也即开始计时前的时长。
可选地，上述N的取值取决于第一终端设备的实现，或由网络设备配置，或预配置，或标准规定。
可选地，上述N为大于1的整数。
可选地，在第一时间范围是上述情况1至6中的任意一种情况时，N可以相同，也可以不同。
在一个示例中，如图10所示，第一终端设备确定资源侦听窗和资源选择窗，根据资源侦听窗内的侦听结果和/或未侦听时隙对资源选择窗中的资源进行排除，获得候选资源集合，具体过程可参照上文介绍此处不再赘述。第一终端设备从候选资源集合中随机选择传输资源，假设N为2，第一终端设备应保证在第一时间范围内选择至少2个传输资源。例如，当第一时间范围为上述情况1时，第一终端设备在资源选择窗与两个On duration时间段(即DRX激活时段)的交集中选择4个资源，即初传、重传1、重传6和重传7。或第一终端设备在资源选择窗与一个On duration时间段(即DRX激活时段)的交集中选择两个资源，例如初传和重传1，或重传6和重传7。当第一时间范围为上述情况3时，第一终端设备在资源选择窗与Inactivity timer对应的时间范围(即DRX非激活定时器的运行时段)的交集中选择3个资源，即重传1、重传2和重传3。当第一时间范围为上述情况5，且目标传输资源为重传3时，第一终端设备在资源选择窗与Retransmission timer对应的时间范围(即DRX重传定时器的运行时段)的交集中选择2个资源，为重传4和重传5。
在另一个示例中，如图11所示，第一终端设备确定资源侦听窗和资源选择窗，在资源选择窗中确定Y个选择时隙t 1到t y，并根据选择时隙和资源池中配置的资源预留周期集合或其子集确定侦听窗内对应的侦听时隙。假设资源预留周期集合包括资源预留周期P 1和P 2，则第一终端设备确定的侦听时隙为t 1-P 1到t y-P 1以及t 1-P 2到t y-P 2。第一终端设备至少根据确定的侦听时隙中的侦听结果和/或未侦听时隙，对选择时隙中的资源进行排除，得到候选资源集合。第一终端设备随机从候选资源集合中选择传输资源，假设N为2，第一终端设备应保证在第一时间范围内选择至少2个传输资源。例如，当第一时间范围为上述情况2时，第一终端设备在确定的选择时隙与1个On duration时间段(即DRX激活时段)的交集中选择2个资源，即初传和重传1。当第一时间范围为上述情况4时，第一终端设备在确定的选择时隙与Inactivity timer对应的时间范围(即DRX非激活定时器的运行时段)的交集中选择3个资源，即重传1、重传2和重传3。当第一时间范围为上述情况6，且目标传输资源为重传3时，第一终端设备在确定的选择时隙与Retransmission timer对应的时间范围(即DRX重传定时器的运行时段)的交集中选择2个资源，为重传4和重传5。
可选地，在一些例外情况下，第一终端设备可以在第一时间范围内选择小于N个传输资源(包括不在第一时间范围内选择传输资源)。上述例外情况至少包括：第一终端设备根据候选资源集合中的剩余资源分布无法在第一时间范围内选择至少N个传输资源。例如，候选资源集合中位于第一时间范围的资源所在的时隙的数目小于N或候选资源集合中位于第一时间范围的资源数目小于N。
需要说明的是，在资源选择时，上述第一时间范围为上述各项的情况可能会仅其中一种情况出现，也可能会多种情况同时出现。例如，在多种情况同时出现时，可以是情况1、3、5中的至少两种情况同时出现，或者情况2、4、6中的至少两种情况同时出现。
本实施例提供的技术方案，在SL通信场景下，通过保证发送端在第一时间范围内选择至少N个传输资源，该第一时间范围包括接收端的链路监听时间段和发送端的资源选择时间段的交集，从而增加了发送端在上述链路监听时间段内的传输次数，保证接收端能够更高概率地接收到发送端的传输，从而提升通信可靠性。
例如，发送端在DRX激活定时器的运行时段(即DRX激活时段)内增加传输次数，使接收端在激活状态下能够接收多次传输，增加通信可靠性。又例如，发送端在DRX非激活定时器的运行时段和/或DRX重传定时器的运行时段内增加传输次数，降低了接收端因没有检测到某次传输就进入睡眠状态的概率，同样有助于增加通信可靠性。
请参考图12，其示出了本申请一个实施例提供的侧行链路的资源排除方法的流程图。该方法可应用于图1所示的网络架构中，例如该方法可以由任意一个终端设备执行。该方法可以包括如下步骤：
步骤1210，第一终端设备对资源选择时间段内的可用资源进行排除，得到候选资源集合，该候选资源集合中位于第二时间范围内的候选资源的数目大于或等于W，W大于或等于0；其中，第二时间范围包括DRX激活时间段和资源选择时间段的交集，DRX激活时间段是根据DRX配置确定的时间段，资源选择时间段是第一终端设备进行资源选择的时间段。
第一终端设备可以是任意一个终端设备，例如该第一终端设备可以作为SL通信的发送端，在向接收端发送数据之前，先采用本实施例介绍的方法进行资源排除确定出候选资源集合，然后从候选资源集合中选择传输资源发送数据。可选地，第一终端设备可以与一个其他终端设备进行SL通信，也可以与多个其他终端设备进行SL通信，因此接收端可以是一个终端设备，也可以是多个终端设备。在本实施例中，为了便于说明，将接收端的终端设备称为第二终端设备，应当理解的是，第二终端设备的数量可以是一个，也可以是多个。
DRX激活时间段是根据DRX配置确定的时间段。例如，DRX激活时间段是由第一终端设备根据DRX配置确定的时间段。在一个示例中，DRX激活时间段是指配置了DRX的第二终端设备处于激活状态(即active状态)的时间段。第一终端设备可以根据DRX配置确定该DRX激活时间段，该DRX配置可以是专门针对于某一个第二终端设备的DRX配置，也可以是针对多个第二终端设备所共有的DRX配置。可选地，该DRX配置可以由网络设备配置，或预配置，或标准规定，或其他终端设备(如第二终端设备)指示给第一终端设备，或取决于第一终端设备的实现。
可选地，DRX激活时间段包括以下至少一种：DRX激活时段、DRX激活定时器的运行时段。DRX激活时段等同于DRX激活定时器的运行时段，是DRX周期中的一部分时间段，第二终端设备在该DRX激活时段/DRX激活定时器的运行时段内处于active状态，检测PSCCH和/或PSSCH。
可选地，资源选择时间段包括以下至少一种：资源选择窗对应的完整时间段、从资源选择窗中确定的部分时间段。如果第一终端设备进行全部侦听(full sensing)(或者说，如果第一终端设备不进行部分侦听(partial sensing)，或在默认情况下)，那么资源选择时间段是资源选择窗对应的完整时间段。如果第一终端设备进行部分侦听(partial sensing)，那么资源选择时间段是从资源选择窗中确定的部分时间段，例如该资源选择时间段包括第一终端设备在资源选择窗内确定的至少Y个时隙，该至少Y个时隙在时域上可以是连续的，也可以是非连续的。
在示例性实施例中，第二时间范围可以为以下任意一种情况：
情况1：DRX激活时段或DRX激活定时器的运行时段，与资源选择窗在时域上的交集；
情况2：DRX激活时段或DRX激活定时器的运行时段，与第一终端设备从资源选择窗中确定的部分时间段(如至少Y个时隙)在时域上的交集。
可选地，上述DRX激活时段或DRX激活定时器的运行时段，是指第一终端设备根据DRX配置确定的一个或多个目标DRX激活定时器从启动到结束的时间段。可选地，目标DRX激活定时器从至少一个候选DRX激活定时器中确定，该候选DRX激活定时器是运行时段与资源选择时间段存在交集的DRX激活定时器。
示例性地，上述一个或多个目标DRX激活定时器包括：全部的候选DRX激活定时器。
示例性地，上述一个或多个目标DRX激活定时器包括：上述至少一个候选DRX激活定时器中，时域位置靠前的H个候选DRX激活定时器，H为正整数。H的取值由网络设备配置，或预配置，或标准规定，或其他终端设备(如第二终端设备)指示给第一终端设备，或取决于第一终端设备的实现。在一个示例中，DRX激活时段或DRX激活定时器的运行时段是指第一终端设备根据DRX配置确定的一个目标DRX激活定时器从启动到结束的时间段，且该一个目标DRX激活定时器是上述至少一个候选DRX激活定时器中，时域位置最靠前的一个候选DRX激活定时器。该示例可以看作是H等于1的特例。
示例性地，上述一个或多个目标DRX激活定时器包括：上述至少一个候选DRX激活定时器中，与资源选择时间段的交集时长最大的候选DRX激活定时器。在一个示例中，DRX激活时段或DRX激活定时器的运行时段是指第一终端设备根据DRX配置确定的一个目标DRX激活定时器从启动到结束的时间段，且该一个目标DRX激活定时器是上述至少一个候选DRX激活定时器中，与资源选择时间段的交集时长最大的候选DRX激活定时器。可选地，如果与资源选择时间段的交集时长最大的候选DRX激活定时器的数量为1个，那么这1个候选DRX激活定时器即为目标DRX激活定时器；如果与资源选择时间段的交集时长最大的候选DRX激活定时器的数量为多个，那么从该多个候选DRX激活定时器中确定出一个候选DRX激活定时器作为目标DRX激活定时器，比如从该多个候选DRX激活定时器中随机选择一个候选DRX激活定时器作为目标DRX激活定时器，或者将该多个候选DRX激活定时器中时域位置最靠前的一个候选DRX激活定时器作为目标DRX激活定时器。
可选地，W的取值为以下情况中的任意一种：
情况1：W＝R*M 1，M 1为资源选择窗内可用资源的总数；
情况2：W＝R*M 2，M 2为第一终端设备从资源选择窗中确定的部分时间段内可用资源的总数，例如 M 2为第一终端设备从资源选择窗中确定的至少Y个时隙内可用资源的总数；
情况3：W＝R*M 3，M 3为第二时间范围内可用资源的总数；
情况4：W＝S*R*M 1，S为第一终端设备计划在第二时间范围内选择的传输资源数目，M 1为资源选择窗内可用资源的总数；
情况5：W＝S*R*M 2，S为第一终端设备计划在第二时间范围内选择的传输资源数目，M 2为第一终端设备从资源选择窗中确定的部分时间段内可用资源的总数；
情况6：W＝S*R*M 3，S为第一终端设备计划在第二时间范围内选择的传输资源数目，M 3为第二时间范围内可用资源的总数；
其中，R为大于或等于0且小于或等于1的数值。上述情况中的S可以由高层指示给物理层。上述R的取值由网络设备配置，或预配置，或标准规定，或其他终端设备(如第二终端设备)指示给第一终端设备，或取决于第一终端设备的实现。可选地，R的取值与资源池配置相关，或者，R的取值与待发送数据的优先级相关。例如，可以与上文介绍的确定X的取值的方式相类似，来确定R的取值。
在一个示例中，如图13所示，第一终端设备确定资源侦听窗和资源选择窗，根据资源侦听窗内的侦听结果和/或未侦听时隙对资源选择窗中的资源进行资源排除，具体过程可参照上文介绍此处不再赘述。第二时间范围为On duration timer对应的时间范围(即DRX激活定时器的运行时段)与资源选择窗在时域上的交集。图13中，On duration timer对应的时间范围为全部与资源选择窗存在交集的On duration timer启动到结束的时间段。第一终端设备应保证资源排除后，候选资源集合中位于第二时间范围内的剩余候选资源数目大于或等于W。
在另一个示例中，如图14所示，第一终端设备确定资源侦听窗和资源选择窗，在资源选择窗中确定Y个选择时隙t 1到t y，并根据选择时隙和资源池中配置的资源预留周期集合或其子集确定侦听窗内对应的侦听时隙。假设资源预留周期集合包括资源预留周期P 1和P 2，则第一终端设备确定的侦听时隙为t 1-P 1到t y-P 1以及t 1-P 2到t y-P 2。第一终端设备至少根据确定的侦听时隙中的侦听结果和/或未侦听时隙，对选择时隙中的资源进行排除。第二时间范围为On duration timer对应的时间范围(即DRX激活定时器的运行时段)与第一终端设备确定的Y个时隙在时域上的交集。图14中，On duration timer对应的时间范围为全部与第一终端设备确定的Y个时隙存在交集的On duration timer启动到结束的时间段。第一终端设备应保证资源排除后，候选资源集合中位于第二时间范围内的剩余候选资源数目大于或等于W。
在示例性实施例中，第一终端设备执行如下步骤对资源选择时间段内的可用资源进行排除，得到候选资源集合，以保证候选资源集合中位于第二时间范围内的剩余候选资源数目大于或等于W：
1、确定初始化的可用资源集合，该初始化的可用资源集合包括资源选择时间段内的全部可用资源，该初始化的可用资源集合中的资源数目为M total；
2、基于侦听结果和/或未侦听时隙，对可用资源集合中的可用资源进行排除，得到第一剩余资源集合；
3、若第一剩余资源集合中的资源数目小于M total*X或者第一剩余资源集合中位于第二时间范围内的资源数目小于W，则提升信道质量阈值，然后再次从上述确定初始化的可用资源集合的步骤开始执行；
4、若第一剩余资源集合中的资源数目大于或等于M total*X且第一剩余资源集合中位于第二时间范围内的资源数目大于或等于W，则将第一剩余资源集合确定为候选资源集合；
其中，X为大于0且小于或等于1的数值，有关X的确定方式可参见上文，此处不再赘述。
可选地，上述第2个步骤“基于侦听结果和/或未侦听时隙，对可用资源集合中的可用资源进行排除，得到第一剩余资源集合”可以进一步包括如下步骤：
2-1、基于未侦听时隙对可用资源集合中的可用资源进行排除，得到第二剩余资源集合；
2-2、若第二剩余资源集合中的资源数目小于M total*X或者第二剩余资源集合中位于第二时间范围内的资源数目小于W，则基于侦听结果对可用资源集合(即上述步骤1中初始化的可用资源集合)中的可用资源进行排除，得到第一剩余资源集合；
2-3、若第二剩余资源集合中的资源数目大于或等于M total*X且第二剩余资源集合中位于第二时间范围内的资源数目大于或等于W，则基于侦听结果对第二剩余资源集合中的可用资源进行排除，得到第一剩余资源集合。
在一个示例中，以全部侦听(full sensing)场景为例，第一终端设备可以执行如下步骤进行资源排除：
1、将资源选择窗内全部的可用资源初始化为资源集合A，记资源集合A中全部可用资源数量为M total。
2、根据资源侦听窗内的未侦听时隙对资源集合A进行资源排除(具体细节可参照Step 1-1)。可选地，该步骤可根据资源池是否激活TB间预留执行或不执行。可选地，当根据未侦听时隙对资源集合A进行排除后，资源集合A中剩余候选资源数目小于M total*X或者资源集合A中位于第二时间范围内的剩余候选资源数目小于W，则将资源集合A初始化为资源选择窗内全部的可用资源，然后执行下述步骤3。
3、根据资源侦听窗内侦听到的第一侧行控制信息对资源集合A进行资源排除(具体细节可参照Step1-2)。
4、如果资源集合A中剩余候选资源数目小于M total*X或者资源集合A中位于第二时间范围内的剩余候选资源数目小于W，则提升RSRP阈值LdB，重新执行步骤1。否则(即资源集合A中剩余候选资源数目大于或等于M total*X，且资源集合A中位于第二时间范围内的剩余候选资源数目大于或等于W)，则结束资源排除过程，将最终得到的资源集合A确定为候选资源集合。
在另一个示例中，以部分侦听(partial sensing)为例，第一终端设备可以执行如下步骤进行资源排除：
1、将第一终端设备从资源选择窗中确定的至少Y个时隙内全部的可用资源初始化为资源集合A，记资源集合A中全部可用资源数量为M total。
2、至少根据资源侦听窗内确定的侦听时隙中的未侦听时隙对资源集合A进行资源排除。可选地，该步骤可根据资源池是否激活TB间预留执行或不执行。可选地，当第一终端设备被配置执行部分侦听时，可以不执行。可选地，当根据未侦听时隙对资源集合A进行排除后，资源集合A中剩余候选资源数目小于M total*X或者资源集合A中位于第二时间范围内的剩余候选资源数目小于W，则将资源集合A初始化为第一终端设备确定的至少Y个时隙内全部的可用资源，然后执行下述步骤3。
3、至少根据资源侦听窗内确定的侦听时隙内侦听到的第一侧行控制信息对资源集合A进行资源排除。
4、如果资源集合A中剩余候选资源数目不足M total*X或者资源集合A中位于第二时间范围内的剩余候选资源数目小于W，则提升RSRP阈值LdB，重新执行步骤1。否则(即资源集合A中剩余候选资源数目大于或等于M total*X，且资源集合A中位于第二时间范围内的剩余候选资源数目大于或等于W)，则结束资源排除过程，将最终得到的资源集合A确定为候选资源集合。
可选地，资源选择时间段内的可用资源，是指资源选择时间段内属于第一终端设备所用资源池的全部可用资源。例如，在资源选择时间段为资源选择窗对应的完整时间段的情况下，该资源选择窗内的可用资源，是指该资源选择窗内属于第一终端设备所用资源池的全部可用资源。又例如，在资源选择时间段为从资源选择窗中确定的部分时间段(如至少Y个时隙)的情况下，该部分时间段(如至少Y个时隙)内的可用资源，是指该部分时间段(如至少Y个时隙)内属于第一终端设备所用资源池的全部可用资源。
本实施例提供的技术方案，在SL通信场景下，通过保证DRX激活时间段内有足够的候选资源，进而保证发送端能够在DRX激活时间段内选择足够数量的资源，使接收端能够在激活状态下接收多次传输，提升通信可靠性。
请参考图15，其示出了本申请另一个实施例提供的侧行链路的资源选择方法的流程图。该方法可应用于图1所示的网络架构中，例如该方法可以由任意一个终端设备执行。该方法可以包括如下步骤：
步骤1510，第一终端设备从候选资源集合中选择传输资源，所选择的传输资源在至少P个第一类时间范围内均存在，P为大于或等于1的整数；其中，第一类时间范围包括DRX激活时段和资源选择时间段的交集，DRX激活时段是根据DRX配置确定的一个DRX激活定时器的运行时段，资源选择时间段是第一终端设备进行资源选择的时间段。
第一终端设备可以是任意一个终端设备，例如该第一终端设备可以作为SL通信的发送端，在向接收端发送数据之前，先采用本实施例介绍的方法选择传输资源，然后使用该选择的传输资源发送数据。可选地，第一终端设备可以与一个其他终端设备进行SL通信，也可以与多个其他终端设备进行SL通信，因此接收端可以是一个终端设备，也可以是多个终端设备。在本实施例中，为了便于说明，将接收端的终端设备称为第二终端设备，应当理解的是，第二终端设备的数量可以是一个，也可以是多个。
DRX激活时段是根据DRX配置确定的一个DRX激活定时器的运行时段。例如，DRX激活时段是由第一终端设备根据DRX配置确定的一个DRX激活定时器的运行时段。在一个示例中，DRX激活时段是指配置了DRX的第二终端设备的一个DRX激活定时器的运行时段。第一终端设备可以根据DRX配置确定该DRX激活时段，该DRX配置可以是专门针对于某一个第二终端设备的DRX配置，也可以是针对多个第二终端设备所共有的DRX配置。可选地，该DRX配置可以由网络设备配置，或预配置，或标准规定，或其他终端设备(如第二终端设备)指示给第一终端设备，或取决于第一终端设备的实现。
DRX激活时段等同于DRX激活定时器的运行时段，是DRX周期中的一部分时间段，第二终端设备在该DRX激活时段/DRX激活定时器的运行时段内处于active状态，检测PSCCH和/或PSSCH。
可选地，资源选择时间段包括以下至少一种：资源选择窗对应的完整时间段、从资源选择窗中确定的部分时间段。如果第一终端设备进行全部侦听(full sensing)(或者说，如果第一终端设备不进行部分侦听(partial sensing)，或在默认情况下)，那么资源选择时间段是资源选择窗对应的完整时间段。如果第一终端设备进行部分侦听(partial sensing)，那么资源选择时间段是从资源选择窗中确定的部分时间段，例如该资源选择时间段包括第一终端设备在资源选择窗内确定的至少Y个时隙，该至少Y个时隙在时域上可以是连续的，也可以是非连续的。
在示例性实施例中，第一类时间范围可以为以下任意一种情况：
情况1：一个DRX激活时段或一个DRX激活定时器的运行时段，与资源选择窗在时域上的交集；
情况2：一个DRX激活时段或一个DRX激活定时器的运行时段，与第一终端设备从资源选择窗中确定的部分时间段(如至少Y个时隙)在时域上的交集。
可选地，DRX激活时段是指第一终端设备根据DRX配置确定的一个目标DRX激活定时器从启动到结束的时间段，目标DRX激活定时器是运行时段与资源选择时间段存在交集的任意一个DRX激活定时器。
可选地，P的取值取决于第一终端设备的实现，或由网络设备配置，或预配置，或标准规定。
可选地，P为大于1的整数。
可选地，P小于或等于U，U为资源选择时间段中包含的第一类时间范围的总数。
可选地，上述P个第一类时间范围是指资源选择时间段中包含的第一类时间范围中，时域位置靠前的P个第一类时间范围。
可选地，在P小于或等于U的情况下，第一终端设备在选择传输资源时，确保所选择的传输资源在至少P个第一类时间范围内均存在。
可选地，在资源选择时间段内存在多个第一类时间范围(即U大于1)的情况下，第一终端设备在选择传输资源时，确保所选择的传输资源在至少P个第一类时间范围内均存在。
可选地，在一些例外情况下，第一终端设备在选择传输资源时可以不满足上述限制条件(即保证所选择的传输资源在至少P个第一类时间范围内均存在)。上述例外情况至少包括：(1)P大于U；(2)第一终端设备根据候选资源集合中的剩余资源分布无法在一个或多个第一类时间范围内选择到传输资源，例如候选资源集合中位于一个或多个第一类时间范围内的资源均被排除。
在一个示例中，如图16所示，第一终端设备确定资源侦听窗和资源选择窗，根据资源侦听窗内的侦听结果和/或未侦听时隙对资源选择窗中的资源进行资源排除，获得候选资源集合，具体过程可参照上文介绍此处不再赘述。第一终端设备从候选资源集合中随机选择传输资源，第一终端设备确定第一类时间范围的总数U为4，假设P为3，第一终端设备应保证在至少3个第一类时间范围内均存在已选资源。在图16中，第一终端设备选择传输资源时，保证时域上前三个第一类时间范围内均存在已选资源(初传位于时域上第一个第一类时间范围内，重传1和重传2位于时域上第二个第一类时间范围内，重传3位于时域上第三个第一类时间范围内)。
在另一个示例中，如图17所示，第一终端设备确定资源侦听窗和资源选择窗，在资源选择窗中确定Y个选择时隙t 1到t y，并根据选择时隙和资源池中配置的资源预留周期集合或其子集确定侦听窗内对应的侦听时隙。假设资源预留周期集合包括资源预留周期P 1和P 2，则第一终端设备确定的侦听时隙为t 1-P 1到t y-P 1以及t 1-P 2到t y-P 2。第一终端设备至少根据确定的侦听时隙中的侦听结果和/或未侦听时隙，对选择时隙中的资源进行排除，得到候选资源集合。第一终端设备随机从候选资源集合中选择传输资源，第一终端设备确定的第一类时间范围的总数U为2，假设P为2，第一终端设备应保证在至少两个第一类时间范围内均存在已选资源。例如图17中，第一终端设备选择传输资源时，保证2个第一类时间范围内均存在已选资源(初传和重传1在时域上第一个第一类时间范围内，重传1和重传2在时域上第二个第一类时间范围内)。
本实施例提供的技术方案，在SL通信场景下，通过保证发送端在至少P个DRX激活时段中均存在已选资源，使得接收端即使因丢包没有启动定时器而进入睡眠状态，也可能在接下来的DRX激活时段内依旧收到同一数据的重传，提升通信可靠性。
下述为本申请装置实施例，可以用于执行本申请方法实施例。对于本申请装置实施例中未披露的细节，请参照本申请方法实施例。
请参考图18，其示出了本申请一个实施例提供的侧行链路的资源选择装置的框图。该装置具有实现上述方法示例的功能，所述功能可以通过硬件实现，也可以通过硬件执行相应的软件实现。该装置可以是上文介绍的第一终端设备，也可以设置于在第一终端设备中。如图18所示，该装置1800可以包括：选择模块1810。
选择模块1810，用于在第一时间范围内选择至少N个传输资源，所述N为大于或等于1的整数；其中，所述第一时间范围包括链路监听时间段和资源选择时间段的交集，所述链路监听时间段是根据DRX配置确定的时间段，所述资源选择时间段是第一终端设备进行资源选择的时间段。
可选地，所述链路监听时间段包括以下至少一种：DRX激活时段、DRX激活定时器的运行时段、DRX非激活定时器的运行时段、DRX重传定时器的运行时段。
可选地，所述DRX激活时段或所述DRX激活定时器的运行时段，是指所述第一终端设备根据所述DRX配置确定的一个或多个目标DRX激活定时器从启动到结束的时间段。
可选地，所述目标DRX激活定时器从至少一个候选DRX激活定时器中确定，所述候选DRX激活定时器是运行时段与所述资源选择时间段存在交集的DRX激活定时器。
可选地，所述一个或多个目标DRX激活定时器包括：全部的所述候选DRX激活定时器；或者，所述至少一个候选DRX激活定时器中，时域位置靠前的H个候选DRX激活定时器，所述H为正整数；或者， 所述至少一个候选DRX激活定时器中，与所述资源选择时间段的交集时长最大的候选DRX激活定时器。
可选地，所述DRX非激活定时器的运行时段，是指所述第一终端设备根据所述DRX非激活定时器的时长和选择的初始传输资源的时域位置，确定的所述DRX非激活定时器从启动到结束的时间段。
可选地，所述DRX非激活定时器的运行时段为(t 1，t 1+t 2]或(t 1，t 1+t 2)，其中，所述t 1为所述初始传输资源的时域位置，所述t 2为所述DRX非激活定时器的时长。
可选地，所述DRX重传定时器的运行时段，是指所述第一终端设备根据所述DRX重传定时器的时长和选择的目标传输资源的时域位置，确定的所述目标传输资源对应的DRX重传定时器从启动到结束的时间段。
可选地，所述DRX重传定时器的运行时段为(t 3，t 3+t 4]或(t 3，t 3+t 4)，其中，所述t 3为所述目标传输资源的时域位置，所述t 4为所述DRX重传定时器的时长。
可选地，所述DRX重传定时器的运行时段，是指所述第一终端设备根据HARQ RTT定时器的时长、所述DRX重传定时器的时长和选择的目标传输资源的时域位置，确定的所述目标传输资源对应的DRX重传定时器从启动到结束的时间段。
可选地，所述DRX重传定时器的运行时段为(t 5+t 6，t 5+t 6+t 4]或(t 5+t 6，t 5+t 6+t 4)，其中，所述t 5为所述目标传输资源对应的PSFCH资源所对应的时域位置，所述t 6为所述HARQ RTT定时器的时长，所述t 4为所述DRX重传定时器的时长。
可选地，所述资源选择时间段包括以下至少一种：资源选择窗对应的完整时间段、从资源选择窗中确定的部分时间段。
可选地，所述N的取值取决于所述第一终端设备的实现，或由网络设备配置，或预配置，或标准规定。
本实施例提供的技术方案，在SL通信场景下，通过保证发送端在第一时间范围内选择至少N个传输资源，该第一时间范围包括接收端的链路监听时间段和发送端的资源选择时间段的交集，从而增加了发送端在上述链路监听时间段内的传输次数，保证接收端能够更高概率地接收到发送端的传输，从而提升通信可靠性。
请参考图19，其示出了本申请一个实施例提供的侧行链路的资源排除装置的框图。该装置具有实现上述方法示例的功能，所述功能可以通过硬件实现，也可以通过硬件执行相应的软件实现。该装置可以是上文介绍的第一终端设备，也可以设置于在第一终端设备中。如图19所示，该装置1900可以包括：排除模块1910。
排除模块1910，用于对资源选择时间段内的可用资源进行排除，得到候选资源集合，所述候选资源集合中位于第二时间范围内的候选资源的数目大于或等于W，所述W大于或等于0；其中，所述第二时间范围包括DRX激活时间段和所述资源选择时间段的交集，所述DRX激活时间段是根据DRX配置确定的时间段，所述资源选择时间段是第一终端设备进行资源选择的时间段。
可选地，所述DRX激活时间段包括以下至少一种：DRX激活时段、DRX激活定时器的运行时段。
可选地，所述DRX激活时段或所述DRX激活定时器的运行时段，是指所述第一终端设备根据所述DRX配置确定的一个或多个目标DRX激活定时器从启动到结束的时间段。
可选地，所述目标DRX激活定时器从至少一个候选DRX激活定时器中确定，所述候选DRX激活定时器是运行时段与所述资源选择时间段存在交集的DRX激活定时器。
可选地，所述一个或多个目标DRX激活定时器包括：全部的所述候选DRX激活定时器；或者，所述至少一个候选DRX激活定时器中，时域位置靠前的H个候选DRX激活定时器，所述H为正整数；或者，所述至少一个候选DRX激活定时器中，与所述资源选择时间段的交集时长最大的候选DRX激活定时器。
可选地，所述资源选择时间段包括以下至少一种：资源选择窗对应的完整时间段、从资源选择窗中确定的部分时间段。
可选地，所述W＝R*M 1，所述M 1为资源选择窗内可用资源的总数；或者，
所述W＝R*M 2，所述M 2为所述第一终端设备从资源选择窗中确定的部分时间段内可用资源的总数；或者，
所述W＝R*M 3，所述M 3为所述第二时间范围内可用资源的总数；或者，
所述W＝S*R*M 1，所述S为所述第一终端设备计划在所述第二时间范围内选择的传输资源数目，所述M 1为资源选择窗内可用资源的总数；或者，
所述W＝S*R*M 2，所述S为所述第一终端设备计划在所述第二时间范围内选择的传输资源数目，所述M 2为所述第一终端设备从资源选择窗中确定的部分时间段内可用资源的总数；或者，
所述W＝S*R*M 3，所述S为所述第一终端设备计划在所述第二时间范围内选择的传输资源数目，所述M 3为所述第二时间范围内可用资源的总数；
其中，所述R为大于或等于0且小于或等于1的数值。
可选地，所述R的取值取决于所述第一终端设备的实现，或由网络设备配置，或预配置，或标准规定。
可选地，所述R的取值由网络设备配置，或预配置，或标准规定，或其他终端设备指示给所述第一终端设备，或取决于所述第一终端设备的实现。
可选地，所述排除模块，用于：
确定初始化的可用资源集合，所述初始化的可用资源集合包括所述资源选择时间段内的全部可用资源，所述初始化的可用资源集合中的资源数目为M total；
基于侦听结果和/或未侦听时隙，对所述可用资源集合中的可用资源进行排除，得到第一剩余资源集合；
若所述第一剩余资源集合中的资源数目小于M total*X或者所述第一剩余资源集合中位于所述第二时间范围内的资源数目小于所述W，则提升信道质量阈值，然后再次从所述确定初始化的可用资源集合的步骤开始执行；
若所述第一剩余资源集合中的资源数目大于或等于M total*X且所述第一剩余资源集合中位于所述第二时间范围内的资源数目大于或等于所述W，则将所述第一剩余资源集合确定为所述候选资源集合；
其中，所述X为大于0且小于或等于1的数值。
本实施例提供的技术方案，在SL通信场景下，通过保证DRX激活时间段内有足够的候选资源，进而保证发送端能够在DRX激活时间段内选择足够数量的资源，使接收端能够在激活状态下接收多次传输，提升通信可靠性。
请参考图20，其示出了本申请另一个实施例提供的侧行链路的资源选择装置的框图。该装置具有实现上述方法示例的功能，所述功能可以通过硬件实现，也可以通过硬件执行相应的软件实现。该装置可以是上文介绍的第一终端设备，也可以设置于在第一终端设备中。如图20所示，该装置2000可以包括：选择模块2010。
选择模块2010，用于从候选资源集合中选择传输资源，所选择的所述传输资源在至少P个第一类时间范围内均存在，所述P为大于或等于1的整数；其中，所述第一类时间范围包括DRX激活时段和资源选择时间段的交集，所述DRX激活时段是根据DRX配置确定的一个DRX激活定时器的运行时段，所述资源选择时间段是第一终端设备进行资源选择的时间段。
可选地，所述DRX激活时段，是指所述第一终端设备根据所述DRX配置确定的一个目标DRX激活定时器从启动到结束的时间段，所述目标DRX激活定时器是运行时段与所述资源选择时间段存在交集的任意一个DRX激活定时器。
可选地，所述资源选择时间段包括以下至少一种：资源选择窗对应的完整时间段、从资源选择窗中确定的部分时间段。
可选地，所述P的取值取决于所述第一终端设备的实现，或由网络设备配置，或预配置，或标准规定。
本实施例提供的技术方案，在SL通信场景下，通过保证发送端在至少P个DRX激活时段中均存在已选资源，使得接收端即使因丢包没有启动定时器而进入睡眠状态，也可能在接下来的DRX激活时段内依旧收到同一数据的重传，提升通信可靠性。
需要说明的一点是，上述实施例提供的装置在实现其功能时，仅以上述各个功能模块的划分进行举例说明，实际应用中，可以根据实际需要而将上述功能分配由不同的功能模块完成，即将设备的内容结构划分成不同的功能模块，以完成以上描述的全部或者部分功能。
关于上述实施例中的装置，其中各个模块执行操作的具体方式已经在有关该方法的实施例中进行了详细描述，此处将不做详细阐述说明。
请参考图21，其示出了本申请一个实施例提供的终端设备210的结构示意图。例如，该终端设备可以是上文实施例中的第一终端设备，用于执行上述侧行链路的资源选择方法或排除方法。具体来讲：该终端设备210可以包括：处理器211、接收器212、发射器213、存储器214和总线215。
处理器211包括一个或者一个以上处理核心，处理器211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212和发射器213可以实现为一个收发器216，该收发器216可以是一块通信芯片。
存储器214通过总线215与处理器211相连。
存储器214可用于存储计算机程序，处理器211用于执行该计算机程序，以实现上述方法实施例中的第一终端设备执行的各个步骤。
此外，存储器214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：RAM(Random-Access Memory，随机存储器)和ROM(Read-Only Memory，只读存储器)、EPROM(Erasable Programmable Read-Only Memory，可擦写可编程只读存储器)、EEPROM(Electrically Erasable Programmable Read-Only Memory，电可擦写可编程只读存储器)、闪存或其他固态存储其技术，CD-ROM(Compact Disc Read-Only Memory，只读光盘)、DVD(Digital Video Disc，高密度数字视频光盘)或其他光学存储、磁带盒、磁带、磁盘存储或其他磁性存储设备。
在一示例性实施例中，所述处理器211，用于在第一时间范围内选择至少N个传输资源，所述N为大于或等于1的整数；其中，所述第一时间范围包括链路监听时间段和资源选择时间段的交集，所述链路监听时间段是由所述第一终端设备根据DRX配置确定的时间段，所述资源选择时间段是指所述第一终端设备进行资源选择的可用资源所对应的时间段。
在另一示例性实施例中，所述处理器211，用于对资源选择时间段内的可用资源进行排除，得到候选资源集合，所述候选资源集合中位于第二时间范围内的候选资源的数目大于或等于W，所述W大于或等于0；其中，所述第二时间范围包括DRX激活时间段和所述资源选择时间段的交集，所述DRX激活时间段是由所述第一终端设备根据DRX配置确定的时间段，所述资源选择时间段是指所述第一终端设备进行资源选择的可用资源所对应的时间段。
在另一示例性实施例中，所述处理器211，用于从候选资源集合中选择传输资源，所选择的所述传输资源在至少P个第一类时间范围内均存在，所述P为大于或等于1的整数；其中，所述第一类时间范围包括DRX激活时段和资源选择时间段的交集，所述DRX激活时段是由所述第一终端设备根据DRX配置确定的一个DRX激活定时器的运行时段，所述资源选择时间段是指所述第一终端设备进行资源选择的可用资源所对应的时间段。
对于上述实施例中未详细说明的细节，可参见上文方法实施例中的介绍说明，此处不再赘述。
本申请实施例还提供了一种计算机可读存储介质，所述存储介质中存储有计算机程序，所述计算机程序用于被终端设备的处理器执行，以实现上述侧行链路的资源选择方法或排除方法。
可选地，该计算机可读存储介质可以包括：ROM(Read-Only Memory，只读存储器)、RAM(Random-Access Memory，随机存储器)、SSD(Solid State Drives，固态硬盘)或光盘等。其中，随机存取记忆体可以包括ReRAM(Resistance Random Access Memory，电阻式随机存取记忆体)和DRAM(Dynamic Random Access Memory，动态随机存取存储器)。
本申请实施例还提供了一种芯片，所述芯片包括可编程逻辑电路和/或程序指令，当所述芯片在终端设备上运行时，用于实现上述侧行链路的资源选择方法或排除方法。
本申请实施例还提供了一种计算机程序产品或计算机程序，所述计算机程序产品或计算机程序包括计算机指令，所述计算机指令存储在计算机可读存储介质中，终端设备的处理器从所述计算机可读存储介质读取并执行所述计算机指令，以实现上述侧行链路的资源选择方法或排除方法。
应理解，在本申请的实施例中提到的“指示”可以是直接指示，也可以是间接指示，还可以是表示具有关联关系。举例说明，A指示B，可以表示A直接指示B，例如B可以通过A获取；也可以表示A间接指示B，例如A指示C，B可以通过C获取；还可以表示A和B之间具有关联关系。
在本申请实施例的描述中，术语“对应”可表示两者之间具有直接对应或间接对应的关系，也可以表示两者之间具有关联关系，也可以是指示与被指示、配置与被配置等关系。
在本文中提及的“多个”是指两个或两个以上。“和/或”，描述关联对象的关联关系，表示可以存在三种关系，例如，A和/或B，可以表示：单独存在A，同时存在A和B，单独存在B这三种情况。字符“/”一般表示前后关联对象是一种“或”的关系。
另外，本文中描述的步骤编号，仅示例性示出了步骤间的一种可能的执行先后顺序，在一些其它实施例中，上述步骤也可以不按照编号顺序来执行，如两个不同编号的步骤同时执行，或者两个不同编号的步骤按照与图示相反的顺序执行，本申请实施例对此不作限定。
本领域技术人员应该可以意识到，在上述一个或多个示例中，本申请实施例所描述的功能可以用硬件、软件、固件或它们的任意组合来实现。当使用软件实现时，可以将这些功能存储在计算机可读介质中或者作为计算机可读介质上的一个或多个指令或代码进行传输。计算机可读介质包括计算机存储介质和通信介质，其中通信介质包括便于从一个地方向另一个地方传送计算机程序的任何介质。存储介质可以是通用或专用计算机能够存取的任何可用介质。
以上所述仅为本申请的示例性实施例，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 (58)

  1. 一种侧行链路的资源选择方法，其特征在于，所述方法由第一终端设备执行，所述方法包括：
    在第一时间范围内选择至少N个传输资源，所述N为大于或等于1的整数；
    其中，所述第一时间范围包括链路监听时间段和资源选择时间段的交集，所述链路监听时间段是根据非连续接收DRX配置确定的时间段，所述资源选择时间段是所述第一终端设备进行资源选择的时间段。
  2. 根据权利要求1所述的方法，其特征在于，所述链路监听时间段包括以下至少一种：DRX激活时段、DRX激活定时器的运行时段、DRX非激活定时器的运行时段、DRX重传定时器的运行时段。
  3. 根据权利要求2所述的方法，其特征在于，所述DRX激活时段或所述DRX激活定时器的运行时段，是指所述第一终端设备根据所述DRX配置确定的一个或多个目标DRX激活定时器从启动到结束的时间段。
  4. 根据权利要求3所述的方法，其特征在于，所述目标DRX激活定时器从至少一个候选DRX激活定时器中确定，所述候选DRX激活定时器是运行时段与所述资源选择时间段存在交集的DRX激活定时器。
  5. 根据权利要求4所述的方法，其特征在于，所述一个或多个目标DRX激活定时器包括：
    全部的所述候选DRX激活定时器；
    或者，
    所述至少一个候选DRX激活定时器中，时域位置靠前的H个候选DRX激活定时器，所述H为正整数；
    或者，
    所述至少一个候选DRX激活定时器中，与所述资源选择时间段的交集时长最大的候选DRX激活定时器。
  6. 根据权利要求2至5任一项所述的方法，其特征在于，所述DRX非激活定时器的运行时段，是指所述第一终端设备根据所述DRX非激活定时器的时长和选择的初始传输资源的时域位置，确定的所述DRX非激活定时器从启动到结束的时间段。
  7. 根据权利要求6所述的方法，其特征在于，所述DRX非激活定时器的运行时段为(t 1，t 1+t 2]或(t 1，t 1+t 2)，其中，所述t 1为所述初始传输资源的时域位置，所述t 2为所述DRX非激活定时器的时长。
  8. 根据权利要求2至7任一项所述的方法，其特征在于，所述DRX重传定时器的运行时段，是指所述第一终端设备根据所述DRX重传定时器的时长和选择的目标传输资源的时域位置，确定的所述目标传输资源对应的DRX重传定时器从启动到结束的时间段。
  9. 根据权利要求8所述的方法，其特征在于，所述DRX重传定时器的运行时段为(t 3，t 3+t 4]或(t 3，t 3+t 4)，其中，所述t 3为所述目标传输资源的时域位置，所述t 4为所述DRX重传定时器的时长。
  10. 根据权利要求2至7任一项所述的方法，其特征在于，所述DRX重传定时器的运行时段，是指所述第一终端设备根据混合自动重传请求HARQ往返时间RTT定时器的时长、所述DRX重传定时器的时长和选择的目标传输资源的时域位置，确定的所述目标传输资源对应的DRX重传定时器从启动到结束的时间段。
  11. 根据权利要求10所述的方法，其特征在于，所述DRX重传定时器的运行时段为(t 5+t 6，t 5+t 6+t 4]或(t 5+t 6，t 5+t 6+t 4)，其中，所述t 5为所述目标传输资源对应的物理侧行反馈信道PSFCH资源所对应的时域位置，所述t 6为所述HARQ RTT定时器的时长，所述t 4为所述DRX重传定时器的时长。
  12. 根据权利要求1至11任一项所述的方法，其特征在于，所述资源选择时间段包括以下至少一种：资源选择窗对应的完整时间段、从资源选择窗中确定的部分时间段。
  13. 根据权利要求1至12任一项所述的方法，其特征在于，所述N的取值取决于所述第一终端设备的实现，或由网络设备配置，或预配置，或标准规定。
  14. 一种侧行链路的资源排除方法，其特征在于，所述方法由第一终端设备执行，所述方法包括：
    对资源选择时间段内的可用资源进行排除，得到候选资源集合，所述候选资源集合中位于第二时间范围内的候选资源的数目大于或等于W，所述W大于或等于0；
    其中，所述第二时间范围包括非连续接收DRX激活时间段和所述资源选择时间段的交集，所述DRX 激活时间段是根据DRX配置确定的时间段，所述资源选择时间段是所述第一终端设备进行资源选择的时间段。
  15. 根据权利要求14所述的方法，其特征在于，所述DRX激活时间段包括以下至少一种：DRX激活时段、DRX激活定时器的运行时段。
  16. 根据权利要求15所述的方法，其特征在于，所述DRX激活时段或所述DRX激活定时器的运行时段，是指所述第一终端设备根据所述DRX配置确定的一个或多个目标DRX激活定时器从启动到结束的时间段。
  17. 根据权利要求16所述的方法，其特征在于，所述目标DRX激活定时器从至少一个候选DRX激活定时器中确定，所述候选DRX激活定时器是运行时段与所述资源选择时间段存在交集的DRX激活定时器。
  18. 根据权利要求17所述的方法，其特征在于，所述一个或多个目标DRX激活定时器包括：
    全部的所述候选DRX激活定时器；
    或者，
    所述至少一个候选DRX激活定时器中，时域位置靠前的H个候选DRX激活定时器，所述H为正整数；
    或者，
    所述至少一个候选DRX激活定时器中，与所述资源选择时间段的交集时长最大的候选DRX激活定时器。
  19. 根据权利要求14至18任一项所述的方法，其特征在于，所述资源选择时间段包括以下至少一种：资源选择窗对应的完整时间段、从资源选择窗中确定的部分时间段。
  20. 根据权利要求14至19任一项所述的方法，其特征在于，
    所述W＝R*M 1，所述M 1为资源选择窗内可用资源的总数；或者，
    所述W＝R*M 2，所述M 2为所述第一终端设备从资源选择窗中确定的部分时间段内可用资源的总数；或者，
    所述W＝R*M 3，所述M 3为所述第二时间范围内可用资源的总数；或者，
    所述W＝S*R*M 1，所述S为所述第一终端设备计划在所述第二时间范围内选择的传输资源数目，所述M 1为资源选择窗内可用资源的总数；或者，
    所述W＝S*R*M 2，所述S为所述第一终端设备计划在所述第二时间范围内选择的传输资源数目，所述M 2为所述第一终端设备从资源选择窗中确定的部分时间段内可用资源的总数；或者，
    所述W＝S*R*M 3，所述S为所述第一终端设备计划在所述第二时间范围内选择的传输资源数目，所述M 3为所述第二时间范围内可用资源的总数；
    其中，所述R为大于或等于0且小于或等于1的数值。
  21. 根据权利要求20所述的方法，其特征在于，所述R的取值由网络设备配置，或预配置，或标准规定，或其他终端设备指示给所述第一终端设备，或取决于所述第一终端设备的实现。
  22. 根据权利要求20或21所述的方法，其特征在于，所述R的取值与资源池配置相关，或者，所述R的取值与待发送数据的优先级相关。
  23. 根据权利要求14至22任一项所述的方法，其特征在于，所述对资源选择时间段内的可用资源进行排除，得到候选资源集合，包括：
    确定初始化的可用资源集合，所述初始化的可用资源集合包括所述资源选择时间段内的全部可用资源，所述初始化的可用资源集合中的资源数目为M total；
    基于侦听结果和/或未侦听时隙，对所述可用资源集合中的可用资源进行排除，得到第一剩余资源集合；
    若所述第一剩余资源集合中的资源数目小于M total*X或者所述第一剩余资源集合中位于所述第二时间范围内的资源数目小于所述W，则提升信道质量阈值，然后再次从所述确定初始化的可用资源集合的步骤开始执行；
    若所述第一剩余资源集合中的资源数目大于或等于M total*X且所述第一剩余资源集合中位于所述第二时间范围内的资源数目大于或等于所述W，则将所述第一剩余资源集合确定为所述候选资源集合；
    其中，所述X为大于0且小于或等于1的数值。
  24. 一种侧行链路的资源选择方法，其特征在于，所述方法由第一终端设备执行，所述方法包括：
    从候选资源集合中选择传输资源，所选择的所述传输资源在至少P个第一类时间范围内均存在，所述P为大于或等于1的整数；
    其中，所述第一类时间范围包括非连续接收DRX激活时段和资源选择时间段的交集，所述DRX激活时段是根据DRX配置确定的一个DRX激活定时器的运行时段，所述资源选择时间段是所述第一终端设备 进行资源选择的时间段。
  25. 根据权利要求24所述的方法，其特征在于，所述DRX激活时段，是指所述第一终端设备根据所述DRX配置确定的一个目标DRX激活定时器从启动到结束的时间段，所述目标DRX激活定时器是运行时段与所述资源选择时间段存在交集的任意一个DRX激活定时器。
  26. 根据权利要求24或25所述的方法，其特征在于，所述资源选择时间段包括以下至少一种：资源选择窗对应的完整时间段、从资源选择窗中确定的部分时间段。
  27. 根据权利要求24至26任一项所述的方法，其特征在于，所述P的取值取决于所述第一终端设备的实现，或由网络设备配置，或预配置，或标准规定。
  28. 一种侧行链路的资源选择装置，其特征在于，所述装置包括：
    选择模块，用于在第一时间范围内选择至少N个传输资源，所述N为大于或等于1的整数；
    其中，所述第一时间范围包括链路监听时间段和资源选择时间段的交集，所述链路监听时间段是根据非连续接收DRX配置确定的时间段，所述资源选择时间段是第一终端设备进行资源选择的时间段。
  29. 根据权利要求28所述的装置，其特征在于，所述链路监听时间段包括以下至少一种：DRX激活时段、DRX激活定时器的运行时段、DRX非激活定时器的运行时段、DRX重传定时器的运行时段。
  30. 根据权利要求29所述的装置，其特征在于，所述DRX激活时段或所述DRX激活定时器的运行时段，是指所述第一终端设备根据所述DRX配置确定的一个或多个目标DRX激活定时器从启动到结束的时间段。
  31. 根据权利要求30所述的装置，其特征在于，所述目标DRX激活定时器从至少一个候选DRX激活定时器中确定，所述候选DRX激活定时器是运行时段与所述资源选择时间段存在交集的DRX激活定时器。
  32. 根据权利要求31所述的装置，其特征在于，所述一个或多个目标DRX激活定时器包括：
    全部的所述候选DRX激活定时器；
    或者，
    所述至少一个候选DRX激活定时器中，时域位置靠前的H个候选DRX激活定时器，所述H为正整数；
    或者，
    所述至少一个候选DRX激活定时器中，与所述资源选择时间段的交集时长最大的候选DRX激活定时器。
  33. 根据权利要求29至32任一项所述的装置，其特征在于，所述DRX非激活定时器的运行时段，是指所述第一终端设备根据所述DRX非激活定时器的时长和选择的初始传输资源的时域位置，确定的所述DRX非激活定时器从启动到结束的时间段。
  34. 根据权利要求33所述的装置，其特征在于，所述DRX非激活定时器的运行时段为(t 1，t 1+t 2]或(t 1，t 1+t 2)，其中，所述t 1为所述初始传输资源的时域位置，所述t 2为所述DRX非激活定时器的时长。
  35. 根据权利要求29至34任一项所述的装置，其特征在于，所述DRX重传定时器的运行时段，是指所述第一终端设备根据所述DRX重传定时器的时长和选择的目标传输资源的时域位置，确定的所述目标传输资源对应的DRX重传定时器从启动到结束的时间段。
  36. 根据权利要求35所述的装置，其特征在于，所述DRX重传定时器的运行时段为(t 3，t 3+t 4]或(t 3，t 3+t 4)，其中，所述t 3为所述目标传输资源的时域位置，所述t 4为所述DRX重传定时器的时长。
  37. 根据权利要求29至34任一项所述的装置，其特征在于，所述DRX重传定时器的运行时段，是指所述第一终端设备根据混合自动重传请求HARQ往返时间RTT定时器的时长、所述DRX重传定时器的时长和选择的目标传输资源的时域位置，确定的所述目标传输资源对应的DRX重传定时器从启动到结束的时间段。
  38. 根据权利要求37所述的装置，其特征在于，所述DRX重传定时器的运行时段为(t 5+t 6，t 5+t 6+t 4]或(t 5+t 6，t 5+t 6+t 4)，其中，所述t 5为所述目标传输资源对应的物理侧行反馈信道PSFCH资源所对应的时域位置，所述t 6为所述HARQ RTT定时器的时长，所述t 4为所述DRX重传定时器的时长。
  39. 根据权利要求28至38任一项所述的装置，其特征在于，所述资源选择时间段包括以下至少一种：资源选择窗对应的完整时间段、从资源选择窗中确定的部分时间段。
  40. 根据权利要求28至39任一项所述的装置，其特征在于，所述N的取值取决于所述第一终端设备 的实现，或由网络设备配置，或预配置，或标准规定。
  41. 一种侧行链路的资源排除装置，其特征在于，所述装置包括：
    排除模块，用于对资源选择时间段内的可用资源进行排除，得到候选资源集合，所述候选资源集合中位于第二时间范围内的候选资源的数目大于或等于W，所述W大于或等于0；
    其中，所述第二时间范围包括非连续接收DRX激活时间段和所述资源选择时间段的交集，所述DRX激活时间段是根据DRX配置确定的时间段，所述资源选择时间段是第一终端设备进行资源选择的时间段。
  42. 根据权利要求41所述的装置，其特征在于，所述DRX激活时间段包括以下至少一种：DRX激活时段、DRX激活定时器的运行时段。
  43. 根据权利要求42所述的装置，其特征在于，所述DRX激活时段或所述DRX激活定时器的运行时段，是指所述第一终端设备根据所述DRX配置确定的一个或多个目标DRX激活定时器从启动到结束的时间段。
  44. 根据权利要求43所述的装置，其特征在于，所述目标DRX激活定时器从至少一个候选DRX激活定时器中确定，所述候选DRX激活定时器是运行时段与所述资源选择时间段存在交集的DRX激活定时器。
  45. 根据权利要求44所述的装置，其特征在于，所述一个或多个目标DRX激活定时器包括：
    全部的所述候选DRX激活定时器；
    或者，
    所述至少一个候选DRX激活定时器中，时域位置靠前的H个候选DRX激活定时器，所述H为正整数；
    或者，
    所述至少一个候选DRX激活定时器中，与所述资源选择时间段的交集时长最大的候选DRX激活定时器。
  46. 根据权利要求41至45任一项所述的装置，其特征在于，所述资源选择时间段包括以下至少一种：资源选择窗对应的完整时间段、从资源选择窗中确定的部分时间段。
  47. 根据权利要求41至46任一项所述的装置，其特征在于，
    所述W＝R*M 1，所述M 1为资源选择窗内可用资源的总数；或者，
    所述W＝R*M 2，所述M 2为所述第一终端设备从资源选择窗中确定的部分时间段内可用资源的总数；或者，
    所述W＝R*M 3，所述M 3为所述第二时间范围内可用资源的总数；或者，
    所述W＝S*R*M 1，所述S为所述第一终端设备计划在所述第二时间范围内选择的传输资源数目，所述M 1为资源选择窗内可用资源的总数；或者，
    所述W＝S*R*M 2，所述S为所述第一终端设备计划在所述第二时间范围内选择的传输资源数目，所述M 2为所述第一终端设备从资源选择窗中确定的部分时间段内可用资源的总数；或者，
    所述W＝S*R*M 3，所述S为所述第一终端设备计划在所述第二时间范围内选择的传输资源数目，所述M 3为所述第二时间范围内可用资源的总数；
    其中，所述R为大于或等于0且小于或等于1的数值。
  48. 根据权利要求47所述的装置，其特征在于，所述R的取值取决于所述第一终端设备的实现，或由网络设备配置，或预配置，或标准规定。
  49. 根据权利要求47或48所述的装置，其特征在于，所述R的取值由网络设备配置，或预配置，或标准规定，或其他终端设备指示给所述第一终端设备，或取决于所述第一终端设备的实现。
  50. 根据权利要求41至49任一项所述的装置，其特征在于，所述排除模块，用于：
    确定初始化的可用资源集合，所述初始化的可用资源集合包括所述资源选择时间段内的全部可用资源，所述初始化的可用资源集合中的资源数目为M total；
    基于侦听结果和/或未侦听时隙，对所述可用资源集合中的可用资源进行排除，得到第一剩余资源集合；
    若所述第一剩余资源集合中的资源数目小于M total*X或者所述第一剩余资源集合中位于所述第二时间范围内的资源数目小于所述W，则提升信道质量阈值，然后再次从所述确定初始化的可用资源集合的步骤开始执行；
    若所述第一剩余资源集合中的资源数目大于或等于M total*X且所述第一剩余资源集合中位于所述第二时间范围内的资源数目大于或等于所述W，则将所述第一剩余资源集合确定为所述候选资源集合；
    其中，所述X为大于0且小于或等于1的数值。
  51. 一种侧行链路的资源选择装置，其特征在于，所述装置包括：
    选择模块，用于从候选资源集合中选择传输资源，所选择的所述传输资源在至少P个第一类时间范围内均存在，所述P为大于或等于1的整数；
    其中，所述第一类时间范围包括非连续接收DRX激活时段和资源选择时间段的交集，所述DRX激活时段是根据DRX配置确定的一个DRX激活定时器的运行时段，所述资源选择时间段是第一终端设备进行资源选择的时间段。
  52. 根据权利要求51所述的装置，其特征在于，所述DRX激活时段，是指所述第一终端设备根据所述DRX配置确定的一个目标DRX激活定时器从启动到结束的时间段，所述目标DRX激活定时器是运行时段与所述资源选择时间段存在交集的任意一个DRX激活定时器。
  53. 根据权利要求51或52所述的装置，其特征在于，所述资源选择时间段包括以下至少一种：资源选择窗对应的完整时间段、从资源选择窗中确定的部分时间段。
  54. 根据权利要求51至53任一项所述的装置，其特征在于，所述P的取值取决于所述第一终端设备的实现，或由网络设备配置，或预配置，或标准规定。
  55. 一种终端设备，其特征在于，所述终端设备包括处理器和存储器，所述存储器中存储有计算机程序，所述处理器执行所述计算机程序以实现如权利要求1至27任一项所述的方法。
  56. 一种计算机可读存储介质，其特征在于，所述存储介质中存储有计算机程序，所述计算机程序用于被处理器执行，以实现如权利要求1至27任一项所述的方法。
  57. 一种芯片，其特征在于，所述芯片包括可编程逻辑电路和/或程序指令，当所述芯片运行时，用于实现如权利要求1至27任一项所述的方法。
  58. 一种计算机程序产品或计算机程序，其特征在于，所述计算机程序产品或计算机程序包括计算机指令，所述计算机指令存储在计算机可读存储介质中，处理器从所述计算机可读存储介质读取并执行所述计算机指令，以实现如权利要求1至27任一项所述的方法。
PCT/CN2021/100651 2021-06-17 2021-06-17 侧行链路的资源选择方法、装置、设备及存储介质 WO2022261899A1 (zh)

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