WO2024065420A1 - 用于侧行通信的方法及终端设备 - Google Patents

用于侧行通信的方法及终端设备 Download PDF

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Publication number
WO2024065420A1
WO2024065420A1 PCT/CN2022/122706 CN2022122706W WO2024065420A1 WO 2024065420 A1 WO2024065420 A1 WO 2024065420A1 CN 2022122706 W CN2022122706 W CN 2022122706W WO 2024065420 A1 WO2024065420 A1 WO 2024065420A1
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Prior art keywords
resource
resources
mcst
psfch
frequency domain
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PCT/CN2022/122706
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English (en)
French (fr)
Inventor
张世昌
丁伊
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Oppo广东移动通信有限公司
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Priority to PCT/CN2022/122706 priority Critical patent/WO2024065420A1/zh
Publication of WO2024065420A1 publication Critical patent/WO2024065420A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation

Definitions

  • the present application relates to the field of communication technology, and more specifically, to a method and terminal device for sideline communication.
  • the communication device needs to listen before talk (LBT) and can access the channel only after LBT is successful. After the communication device successfully accesses the channel through LBT, it can transmit continuously or discontinuously within the corresponding channel occupancy time (COT).
  • LBT listen before talk
  • COT channel occupancy time
  • MCSt transmission may be introduced in the sidelink over unlicensed spectrum (SL-U) system, that is, the terminal device can transmit continuously in multiple time slots to improve the utilization rate of COT.
  • SL-U sidelink over unlicensed spectrum
  • the present application provides a method and terminal device for sideline communication.
  • the following introduces various aspects involved in the present application.
  • a method for sideline communication comprising: a terminal device determines a first multi-slot continuous transmission MCSt resource, the first MCSt resource occupies M consecutive time slots in the time domain, M is a positive integer greater than 1, and the first MCSt resource satisfies one of the following in the frequency domain: occupies one or more resource blocks or interleaved resource blocks in a sideline resource pool; occupies one or more resource block sets in the sideline resource pool; and occupies one or more subchannels in the sideline resource pool.
  • a method for sideline communication comprising: a terminal device selects resources in a sideline resource pool based on a first parameter, wherein the first parameter is associated with a multi-slot continuous transmission MCSt resource.
  • a terminal device comprising: a processing unit, used to determine a first multi-slot continuous transmission MCSt resource, the first MCSt resource occupies M consecutive time slots in the time domain, M is a positive integer greater than 1, and the first MCSt resource satisfies one of the following in the frequency domain: occupies one or more resource blocks or interleaved resource blocks in the sideline resource pool; occupies one or more resource block sets in the sideline resource pool; and occupies one or more sub-channels in the sideline resource pool.
  • a terminal device comprising: a processing unit, configured to select resources in a sidelink resource pool based on a first parameter, wherein the first parameter is associated with a multi-slot continuous transmission MCSt resource.
  • a terminal device comprising a processor, a memory and a communication interface, wherein the memory is used to store one or more computer programs, and the processor is used to call the computer programs in the memory so that the terminal device executes part or all of the steps in the method of the above aspect.
  • an embodiment of the present application provides a communication system, which includes the above-mentioned terminal device.
  • the system may also include other devices that interact with the terminal device or network device in the solution provided by the embodiment of the present application.
  • an embodiment of the present application provides a computer-readable storage medium, wherein the computer-readable storage medium stores a computer program, wherein the computer program enables a communication device (eg, a terminal device) to execute part or all of the steps in the methods of the above-mentioned aspects.
  • a communication device eg, a terminal device
  • an embodiment of the present application provides a computer program product, wherein the computer program product includes a non-transitory computer-readable storage medium storing a computer program, and the computer program is operable to cause a communication device (e.g., a terminal device) to perform some or all of the steps in the methods of the above various aspects.
  • the computer program product can be a software installation package.
  • an embodiment of the present application provides a chip comprising a memory and a processor, wherein the processor can call and run a computer program from the memory to implement some or all of the steps described in the methods of the above aspects.
  • the embodiment of the present application provides a method for sideline communication to define the first MCSt resource occupied by MCSt in the SL-U system, that is, the first MCSt resource can occupy M consecutive time slots in the time domain, and the first MCSt resource satisfies one of the following in the frequency domain: occupies one or more resource blocks or interleaved resource blocks in the resource pool; occupies one or more resource block sets in the resource pool; and occupies one or more subchannels in the resource pool.
  • This definition method of the first MCSt resource is helpful to implement MCSt in the SL-U system.
  • FIG1 is a diagram showing an example of a system architecture of a wireless communication system to which an embodiment of the present application can be applied.
  • FIG. 2 is an example diagram of a scenario of sideline communication within network coverage.
  • FIG3 is an example diagram of a scenario of sideline communication with partial network coverage.
  • FIG. 4 is a diagram showing an example scenario of sideline communication outside network coverage.
  • FIG. 5 is a diagram showing an example scenario of side communication based on a central control node.
  • FIG. 6 is an exemplary diagram of a sideline communication method based on broadcasting.
  • FIG. 7 is an example diagram of a sideline communication method based on unicast.
  • FIG. 8 is an example diagram of a sideline communication method based on multicast.
  • FIG. 9 is a schematic diagram showing a physical layer structure in sideline communication.
  • FIG. 10 is a schematic diagram showing another physical layer structure in sideline communication.
  • FIG. 11 is a schematic diagram showing a method for reserving resources in a sideline communication system.
  • FIG. 12 is a schematic diagram showing a resource selection method based on listening in a sideline communication system.
  • FIG. 13 is a schematic diagram showing a resource selection method based on listening in a sideline communication system.
  • FIG14 is a schematic diagram of a resource mapping method on an unlicensed spectrum applicable to an embodiment of the present application.
  • FIG. 15 is an example of a resource pool configured on an unlicensed spectrum to which an embodiment of the present application is applicable.
  • FIG. 16 is a schematic flowchart of a method for sideline communication according to an embodiment of the present application.
  • FIG17 shows a schematic diagram of a PSFCH resource configuration method according to an embodiment of the present application.
  • FIG18 shows a schematic diagram of a PSFCH resource configuration method according to another embodiment of the present application.
  • Figure 19 shows a schematic diagram of the relationship between the first MCSt resource and the resources within the last symbol in an embodiment of the present application.
  • FIG. 20 is a schematic diagram of a method for sideline communication according to another embodiment of the present application.
  • Figure 21 is a schematic diagram of a terminal device according to an embodiment of the present application.
  • FIG. 22 is a schematic diagram of a terminal device according to another embodiment of the present application.
  • FIG. 23 is a schematic structural diagram of a communication device according to an embodiment of the present application.
  • the wireless communication system 100 may include a network device 110 and a terminal device 120.
  • the network device 110 may be a device that communicates with the terminal device 120.
  • the network device 110 may provide communication coverage for a specific geographical area, and may communicate with the terminal device 120 located in the coverage area.
  • FIG1 exemplarily shows a network device and a terminal device.
  • the wireless communication system 100 may include one or more network devices 110 and/or one or more terminal devices 120.
  • the one or more terminal devices 120 may all be located within the network coverage of the network device 110, or may all be located outside the network coverage of the network device 110, or may be partially located within the coverage of the network device 110 and partially located outside the network coverage of the network device 110, which is not limited in the embodiments of the present application.
  • the wireless communication system 100 may also include other network entities such as a network controller and a mobility management entity, which is not limited in the embodiments of the present application.
  • network entities such as a network controller and a mobility management entity, which is not limited in the embodiments of the present application.
  • the technical solutions of the embodiments of the present application can be applied to various communication systems, such as: the fifth generation (5th generation, 5G) system or new radio (new radio, NR), long term evolution (long term evolution, LTE) system, LTE frequency division duplex (frequency division duplex, FDD) system, LTE time division duplex (time division duplex, TDD), etc.
  • 5G fifth generation
  • NR new radio
  • long term evolution long term evolution
  • LTE long term evolution
  • LTE frequency division duplex frequency division duplex
  • FDD frequency division duplex
  • TDD time division duplex
  • future communication systems such as the sixth generation mobile communication system, satellite communication system, etc.
  • the terminal device in the embodiment of the present application may also be referred to as user equipment (UE), access terminal, user unit, user station, mobile station, mobile station (MS), mobile terminal (MT), remote station, remote terminal equipment, mobile device, user terminal, wireless communication equipment, user agent or user device.
  • the terminal device in the embodiment of the present application may be a device that provides voice and/or data connectivity to a user, and can be used to connect people, objects and machines, such as a handheld device with wireless connection function, a vehicle-mounted device, etc.
  • the terminal device in the embodiment of the present application can be a mobile phone, a tablet computer, a laptop, a PDA, a mobile internet device (MID), a wearable device, a vehicle, a wireless terminal in industrial control, a wireless terminal in self-driving, a wireless terminal in remote medical surgery, a wireless terminal in smart grid, a wireless terminal in transportation safety, a wireless terminal in smart city, a wireless terminal in smart home, etc.
  • the terminal device can act as a dispatching entity, which provides a sidelink signal between terminal devices in vehicle-to-everything (V2X) or device-to-device communication (D2D), etc.
  • V2X vehicle-to-everything
  • D2D device-to-device communication
  • a cellular phone and a car communicate with each other using a sidelink signal.
  • the cellular phone and the smart home device communicate with each other without relaying the communication signal through a base station.
  • the terminal device can be used to act as a base station.
  • the network device in the embodiment of the present application may be a device for communicating with a terminal device, and the network device may also be referred to as an access network device or a wireless access network device, such as a base station.
  • the network device in the embodiment of the present application may refer to a wireless access network (RAN) node (or device) that connects a terminal device to a wireless network.
  • RAN wireless access network
  • Base station can broadly cover various names as follows, or be replaced with the following names, such as: NodeB, evolved NodeB (eNB), next generation NodeB (gNB), relay station, access point, transmitting and receiving point (TRP), transmitting point (TP), master station MeNB, auxiliary station SeNB, multi-standard radio (MSR) node, home base station, network controller, access node, wireless node, access point (AP), transmission node, transceiver node, base band unit (BBU), remote radio unit (RRU), active antenna unit (AAU), remote radio head (RRH), central unit (CU), distributed unit (DU), positioning node, etc.
  • NodeB evolved NodeB (eNB), next generation NodeB (gNB), relay station, access point, transmitting and receiving point (TRP), transmitting point (TP), master station MeNB, auxiliary station SeNB, multi-standard radio (MSR) node, home base station, network controller, access node, wireless node, access point (AP), transmission node, transceiver no
  • the base station can be a macro base station, a micro base station, a relay node, a donor node or the like, or a combination thereof.
  • the base station may also refer to a communication module, modem or chip used to be set in the aforementioned device or apparatus.
  • the base station may also be a mobile switching center and a device that performs the base station function in device-to-device D2D, V2X, machine-to-machine (M2M) communications, a network-side device in a 6G network, and a device that performs the base station function in a future communication system.
  • the base station may support networks with the same or different access technologies. The embodiments of the present application do not limit the specific technology and specific device form adopted by the network equipment.
  • Base stations can be fixed or mobile.
  • a helicopter or drone can be configured to act as a mobile base station, and one or more cells can move based on the location of the mobile base station.
  • a helicopter or drone can be configured to act as a device that communicates with another base station.
  • the network device in the embodiments of the present application may refer to a CU or a DU, or the network device includes a CU and a DU.
  • the gNB may also include an AAU.
  • the network equipment and terminal equipment can be deployed on land, including indoors or outdoors, handheld or vehicle-mounted; they can also be deployed on the water surface; they can also be deployed on aircraft, balloons and satellites in the air.
  • the embodiments of the present application do not limit the scenarios in which the network equipment and terminal equipment are located.
  • Sidelink communication refers to communication technology based on sidelinks.
  • Sidelink communication can be, for example, device-to-device (D2D) or vehicle-to-everything (V2X) communication.
  • D2D device-to-device
  • V2X vehicle-to-everything
  • communication data is received or sent between terminal devices and network devices, while sidelink communication supports direct communication data transmission between terminal devices.
  • direct communication data transmission between terminal devices can have higher spectrum efficiency and lower transmission latency.
  • the vehicle networking system adopts sidelink communication technology.
  • the side communication can be divided into side communication within the network coverage, side communication with partial network coverage, and side communication outside the network coverage.
  • FIG2 is a diagram showing an example of a sideline communication scenario within network coverage.
  • both terminal devices 120a are within the coverage of the network device 110. Therefore, both terminal devices 120a can receive the configuration signaling of the network device 110 (the configuration signaling in this application can also be replaced by configuration information), and determine the sideline configuration according to the configuration signaling of the network device 110. After both terminal devices 120a perform the sideline configuration, sideline communication can be performed on the sideline link.
  • FIG3 is a diagram showing an example of a sidelink communication scenario with partial network coverage.
  • terminal device 120a performs sidelink communication with terminal device 120b.
  • Terminal device 120a is located within the coverage of network device 110, so terminal device 120a can receive the configuration signaling of network device 110 and determine the sidelink configuration according to the configuration signaling of network device 110.
  • Terminal device 120b is located outside the network coverage and cannot receive the configuration signaling of network device 110.
  • terminal device 120b can determine the sidelink configuration according to the pre-configuration information and/or the information carried in the physical sidelink broadcast channel (PSBCH) sent by terminal device 120a located within the network coverage.
  • PSBCH physical sidelink broadcast channel
  • FIG4 is a diagram showing an example of a sideline communication scenario outside network coverage.
  • both terminal devices 120b are outside network coverage.
  • both terminal devices 120b can determine the sideline configuration according to the preconfiguration information. After both terminal devices 120b perform the sideline configuration, sideline communication can be performed on the sideline link.
  • FIG5 is a diagram showing an example of a sideline communication scenario based on a central control node.
  • multiple terminal devices may constitute a communication group, and the communication group has a central control node.
  • the central control node may be a terminal device in the communication group (such as terminal device 1 in FIG5 ), which may also be referred to as a cluster head (CH) terminal device.
  • the central control node may be responsible for completing one or more of the following functions: establishing a communication group, joining and leaving of group members of the communication group, coordinating resources within the communication group, allocating sideline transmission resources to other terminal devices, receiving sideline feedback information from other terminal devices, and coordinating resources with other communication groups.
  • Certain standards or protocols (such as the 3rd Generation Partnership Project (3GPP)) define two modes of sideline communication: a first mode and a second mode.
  • the resources of the terminal device are allocated by the network device.
  • the terminal device may send data on the sidelink according to the resources allocated by the network device.
  • the network device may allocate resources for a single transmission to the terminal device, or may allocate resources for semi-static transmission to the terminal device.
  • the first mode may be applied to a scenario covered by a network device, such as the scenario shown in FIG2 above. In the scenario shown in FIG2, the terminal device 120a is within the network coverage of the network device 110, so the network device 110 may allocate resources used in the sidelink transmission process to the terminal device 120a.
  • the terminal device can autonomously select one or more resources from a resource pool (RP). Then, the terminal device can perform side transmission according to the selected resources.
  • RP resource pool
  • the terminal device 120b is located outside the cell coverage. Therefore, the terminal device 120b can autonomously select resources from a preconfigured resource pool for side transmission.
  • the terminal device 120a can also autonomously select one or more resources from a resource pool configured by the network device 110 for side transmission.
  • the receiving terminal can be any terminal device around the transmitting terminal.
  • terminal device 1 is the transmitting terminal
  • the receiving terminal corresponding to the transmitting terminal is any terminal device around terminal device 1, for example, it can be terminal device 2-terminal device 6 in Figure 6.
  • some communication systems also support unicast-based data transmission (hereinafter referred to as unicast transmission) and/or multicast-based data transmission (hereinafter referred to as multicast transmission).
  • unicast transmission hereinafter referred to as unicast transmission
  • multicast transmission hereinafter referred to as multicast transmission.
  • NR-V2X new radio vehicle to everything
  • autonomous driving places higher requirements on data interaction between vehicles.
  • data interaction between vehicles requires higher throughput, lower latency, higher reliability, larger coverage, more flexible resource allocation methods, etc. Therefore, in order to improve the performance of data interaction between vehicles, NR-V2X introduces unicast transmission and multicast transmission.
  • the receiving terminal generally has only one terminal device. Taking Figure 7 as an example, unicast transmission is performed between terminal device 1 and terminal device 2.
  • Terminal device 1 can be a sending terminal
  • terminal device 2 can be a receiving terminal
  • terminal device 1 can be a receiving terminal
  • terminal device 2 can be a sending terminal.
  • the receiving terminal can be a terminal device in a communication group, or the receiving terminal can be a terminal device within a certain transmission distance.
  • terminal device 1 terminal device 2, terminal device 3 and terminal device 4 constitute a communication group. If terminal device 1 sends data, the other terminal devices in the group (terminal device 2 to terminal device 4) can all be receiving terminals.
  • Figure 9 shows the frame structure of a system frame that does not carry a physical sidelink feedback channel (PSFCH) in NR-V2X.
  • Figure 10 shows the frame structure of a system frame that carries PSFCH in NR-V2X.
  • PSFCH physical sidelink feedback channel
  • the sidelink symbols occupied by PSCCH start from the second sidelink symbol of the system frame (for example, orthogonal frequency division multiplexing (OFDM) symbol) and occupy 2 or 3 sidelink symbols.
  • the physical sidelink control channel (PSCCH) can occupy ⁇ 10, 12 15, 20, 25 ⁇ physical resource blocks (PRBs).
  • PRBs physical resource blocks
  • the subchannel is the minimum granularity of PSSCH resource allocation specified in NR-V2X
  • the number of PRBs occupied by PSCCH must be less than or equal to the number of PRBs contained in a subchannel in the resource pool, so as to avoid additional restrictions on the resource selection or allocation of the physical sidelink shared channel (PSSCH).
  • the PSSCH in the time domain, also starts from the second sideline symbol of the system frame and ends at the penultimate sideline symbol of the system frame.
  • the PSSCH occupies K1 subchannels of the system frame, each subchannel includes K2 consecutive PRBs, and K1 and K2 are positive integers.
  • the last symbol of the system frame is a guard period (GP) symbol.
  • the first side symbol of the system frame is a repetition of the second side symbol.
  • AGC automatic gain control
  • the data on the AGC symbol is usually not used for data demodulation.
  • the first OFDM symbol is fixed for automatic gain control (AGC).
  • AGC automatic gain control
  • the UE copies the information sent on the second symbol.
  • the last symbol of the time slot is the protection interval, which is used for transceiver conversion and for the UE to switch from the transmit (or receive) state to the receive (or transmit) state.
  • the PSCCH can occupy two or three OFDM symbols starting from the second sideline symbol.
  • the PRB occupied by the PSCCH is within the subchannel range of a PSSCH.
  • the PSCCH can be frequency-division multiplexed with the PSSCH on the OFDM symbol where the PSCCH is located.
  • the PSCCH is used to carry the first-order SCI, which mainly includes fields related to resource monitoring, so that other UEs can exclude and select resources after decoding.
  • the PSSCH also carries the second-order SCI.
  • the second side control information mainly includes fields related to data demodulation, so that other UEs can demodulate the data in the PSSCH.
  • PSFCH resources are periodically configured, and the period can be ⁇ 0,1,2,4 ⁇ time slots. If it is 0, it means that there is no PSFCH resource configuration in the current resource pool, and a period of 2 or 4 time slots can reduce the system resources occupied by PSFCH. If there are PSFCH resources in a time slot, the PSFCH is located in the second-to-last OFDM symbol in the time slot. Since the UE's receiving power may change on the OFDM symbol where the PSFCH is located, the third-to-last symbol in the time slot will also be used for PSFCH transmission to assist the receiving UE in AGC adjustment. The signal on the third-to-last symbol is a repetition of the signal on the second-to-last symbol. In addition, the UE sending PSSCH and the UE sending PSFCH may be different. Therefore, an additional symbol is required before the two PSFCH symbols for the UE's transceiver conversion.
  • the terminal device can autonomously select sideline resources to send data.
  • Resource reservation can be understood as a prerequisite for supporting the terminal device to select resources.
  • Resource reservation means that the terminal device can reserve the selected sideline resources (e.g., time-frequency resources) in the first sideline control information carried by the PSCCH.
  • both intra-TB resource reservation and inter-TB resource reservation are supported.
  • the terminal device sends a first sidelink control information (SCI), and uses the time resource assignment field and the frequency resource assignment field in the first SCI to indicate the N time-frequency resources used for the current TB transmission (including the time-frequency resources used for the current transmission block (TB)).
  • SCI sidelink control information
  • Nmax is equal to 2 or 3.
  • the above-mentioned N indicated time-frequency resources can be distributed in W time slots. In NR V2X, W is equal to 32.
  • the initial transmission and retransmission 1 are distributed in 32 time slots in the time domain.
  • the terminal device can use the first SCI sent in the PSCCH of retransmission 1 to indicate the time-frequency resources of retransmission 1 and retransmission 2.
  • the time-frequency resources of retransmission 1 and the time-frequency resources of retransmission 2 can be distributed in 32 time slots in the time domain.
  • the terminal device when it sends the first SCI, it can use the resource reservation period field in the first SCI to reserve resources between TBs.
  • the terminal device when the terminal device sends the first SCI indicating the initial transmission resources of TB 1, it can use the time domain resource allocation domain and the frequency domain resource allocation domain in the first SCI to indicate the time-frequency resource position of the initial transmission and retransmission 1 of TB 1, which is recorded as ⁇ (t1, f1), (t2, f2) ⁇ .
  • t1 and t2 represent the time domain position of the initial transmission and retransmission 1 resources of TB 1
  • f1 and f2 represent the frequency domain position of the initial transmission and retransmission 1 resources of TB 1.
  • the first SCI simultaneously indicates the time-frequency resources ⁇ (t1+100, f1), (t2+100, f2) ⁇ , and these two resources are used for the transmission of the initial transmission and retransmission 1 of TB 2.
  • the first SCI sent on the retransmission 1 resource of TB 1 can also reserve the time-frequency resources of TB 2 retransmission 1 and retransmission 2 using the resource reservation period field.
  • the possible values of the resource reservation period field are 0, 1-99, 100, 200, 300, 400, 500, 600, 700, 800, 900, 1000 milliseconds, which is more flexible than LTE V2X.
  • e values in the resource pool configuration are recorded as the resource reservation period set M. Exemplarily, e is less than or equal to 16.
  • the above-mentioned reservation between TBs can be activated or deactivated in units of resource pools.
  • the first SCI does not include the resource reservation period field.
  • the value of the resource reservation period field used by the terminal device that is, the resource reservation period, will not change.
  • the terminal device uses the "resource reservation period field" therein to reserve the resources of the next period for the transmission of another TB, thereby achieving periodic semi-continuous transmission.
  • the terminal device When the terminal device operates in the above-mentioned mode 2, the terminal device can obtain the first SCI sent by other terminal devices by monitoring the PSCCH sent by other terminal devices, thereby knowing the resources reserved by other terminal devices. When the terminal device performs resource selection next, it will exclude the resources reserved by the above-mentioned other terminal devices, thereby avoiding resource collision.
  • the following introduces the resource selection method based on monitoring in the side communication system in conjunction with Figures 12 and 13.
  • time slot n may be a time slot in which a higher layer (e.g., a MAC layer) triggers the physical layer to report a set of candidate resources.
  • the resource selection window starts from n+T 1 and ends at n+T 2 , expressed as [n+T 1 , n+T 2 ].
  • the terminal device determines T 2min from the value set according to the priority of its own data to be sent. For example, when the subcarrier spacing is 15kHz, the terminal device determines T2min from the set ⁇ 1,5,10,20 ⁇ according to the priority of its own data to be sent.
  • T2min is greater than or equal to the remaining delay budget of the service
  • T2 is equal to the remaining delay budget of the service.
  • the remaining delay budget is the difference between the corresponding time of the data delay requirement and the current time. For example, the data packet arriving at time slot n has a delay requirement of 50 milliseconds. Assuming that 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 Before resource selection, the terminal device needs to perform resource listening in the listening window of nT 0 to nT proc,0, where T 0 is 100 or 1100 milliseconds.
  • T 0 is 100 or 1100 milliseconds.
  • T proc,0 is 1, 2, or 4 time slots.
  • a terminal device will listen to the first SCI sent by other terminal devices in each time slot (except its own transmission time slot). If resource selection or reselection is triggered in time slot n, the terminal device can use the result of resource listening from nT 0 to nT proc,0 .
  • the resource selection process is introduced below in conjunction with steps 1 to 2.
  • step 1 the terminal device takes all candidate available resources in the resource selection window that belong to the resource pool used by the terminal device as a resource set A (hereinafter referred to as a "candidate resource set").
  • the terminal device may take all available resources belonging to the resource pool used by the terminal device in the resource selection window as resource set A, and any single time slot resource in resource set A is recorded as R(x, y), where x and y respectively indicate the frequency domain position and time domain position of the resource, representing one or more continuous subchannels starting from subchannel y in time slot x.
  • the initial number of resources in resource set A is recorded as Mtotal.
  • the terminal device may exclude resources in resource set A based on unlistened time slots in the resource listening window (case 1-1) and/or resource listening results in the resource listening window (case 1-2).
  • the terminal determines whether resource R(x, y) or a series of periodic resources corresponding to resource R(x, y) overlaps with the time slot determined based on the unlistened time slot in case 1-1 or the resource determined based on the first side control information heard in case 1-2, and if so, excludes resource R(x, y) from resource set A.
  • a series of periodic resources corresponding to the resource R(x,y) are Cresel resources with the same frequency domain position as R(x,y) and a fixed time interval in the time domain, where Cresel is related to a random count value generated by the terminal.
  • the time interval is determined according to the resource reservation period Ptx of the terminal.
  • Figure 12 shows a case where Cresel is 3, indicating 3 periodic resources corresponding to the resource R(x,y) (including R(x,y)).
  • the terminal does not listen in time slot m, and excludes resources according to each resource reservation period in the resource reservation period set M in the resource pool configuration used.
  • the corresponding Q time slots are the next two time slots marked with horizontal line shadows mapped from time slot m in FIG12 with resource reservation period 1 as an interval.
  • the corresponding Q time slots are the next 1 time slot mapped from time slot m in FIG12 with resource reservation period 2 as an interval.
  • the terminal will determine whether the Q time slots corresponding to each reservation period overlap with the resource R(x, y) or a series of periodic resources corresponding to the resource R(x, y). If so, the resource R(x, y) will be excluded from the resource set A.
  • the terminal may not execute the above situation 1-1.
  • resource set A is initialized to all available resources in the resource selection window belonging to the resource pool used by the terminal and situation 1-2 is executed again.
  • Case 1-2 If the terminal detects the first sidelink control information transmitted in the PSCCH in time slot m within the listening window, it measures the sidelink reference signal receiving power (SL-RSRP) of the PSCCH or the SL-RSRP of the PSSCH scheduled by the PSCCH (i.e. the SL-RSRP of the corresponding PSSCH sent in the same time slot as the PSCCH).
  • SL-RSRP sidelink reference signal receiving power
  • the terminal will determine the corresponding Q time slots based on the resource reservation period carried in the time slot m and the first sideline control information detected, with the resource reservation period as the interval. The terminal assumes that the first sideline control information with the same content is also received in the Q time slots. The terminal will determine whether the resources indicated by the "time resource assignment" and “frequency resource assignment" fields of the first sideline control information received in time slot m and these Q assumed received first sideline control information overlap with the resource R(x, y) or a series of periodic resources corresponding to the resource R(x, y).
  • Prx is the resource reservation period carried in the first side control information detected.
  • a series of periodic resources corresponding to the resource R(x,y) are Cresel resources with the same frequency domain position as R(x,y) and a fixed time interval in the time domain, where Cresel is related to the random count value generated by the terminal.
  • the time interval is determined according to the resource reservation period Ptx of the terminal.
  • Figure 13 shows a case where Cresel is 3, indicating 3 periodic resources corresponding to the resource R(x,y) (it should be noted that the 3 periodic resources include R(x,y)).
  • the terminal when the SCI received by the UE includes a resource reservation period field, if the terminal detects the first sideline control information in the PSCCH on the resource E(v, m) in the time slot m, the resource reservation period in the first sideline control information is Prx, and assuming that the Q value is calculated to be 1, the terminal will assume that the first sideline control information with the same content is also received in the next time slot (i.e., the time slot where resource 4 is located) starting from time slot m and with an interval of Prx.
  • the next time slot i.e., the time slot where resource 4 is located
  • the terminal will determine whether the resources 1, 2, 3, 4, 5, 6 indicated by the "Time resource assignment” and “Frequency resource assignment” fields of the first sideline control information received in time slot m and the first sideline control information assumed to be received overlap with the resource R(x, y) or a series of periodic resources corresponding to the resource R(x, y). If they overlap and the RSRP condition is met, the resource R(x, y) is excluded from the resource set A.
  • the terminal determines whether the resources indicated by the "Time resource assignment" field and the "Frequency resource assignment” field of the first sideline control information received in time slot m overlap with the resource R(x,y) or a series of resources corresponding to the resource R(x,y). If they overlap, the resource R(x,y) is excluded from the resource set A.
  • the terminal determines whether the resources 1, 2, 3 indicated by the "Time resource assignment” and “Frequency resource assignment” fields in the first sideline control information overlap with the resource R(x, y) or a series of periodic resources corresponding to the resource R(x, y). If they overlap and the RSRP condition is met, the resource R(x, y) is excluded from the resource set A.
  • the SL-RSRP threshold is raised by 3dB and step 1 is re-executed.
  • the physical layer reports resource set A after resource exclusion as a candidate resource set to the upper layer.
  • step 2 the high layer randomly selects a resource 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.
  • step 1 may be performed by the physical layer of the terminal device, and accordingly, the high layer in step 2 may be a high layer relative to the physical layer, such as the MAC layer.
  • the above RSRP threshold is determined by the priority P1 carried in the PSCCH detected by the terminal and the priority P2 of the data to be sent by the terminal.
  • the configuration of the resource pool used by the terminal includes a SL-RSRP threshold table, which contains the SL-RSRP thresholds corresponding to all priority combinations.
  • the configuration of the resource pool can be network configuration or pre-configured.
  • the terminal monitors the PSCCH sent by other UEs, it obtains the priority P1 and the priority P2 of the to-be-sent data carried in the first sidelink control information transmitted in the PSCCH, and determines the SL-RSRP threshold by looking up Table 1.
  • the terminal 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.
  • the resource pool configuration can be network configuration or pre-configured.
  • the possible values of X, X are ⁇ 20%, 35%, 50% ⁇ .
  • the configuration of the resource pool used by the terminal includes the correspondence between the priority and the above possible values.
  • the terminal determines the value of X according to the priority of the data to be sent and the correspondence.
  • the resource pool configuration can be configured by the network or pre-configured.
  • the above introduction is a SL communication method in NR-V2X, that is, the terminal autonomously selects transmission resources through resource listening and transmits data on the side link.
  • 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.
  • Unlicensed spectrum is a spectrum that can be used for radio equipment communications, which is divided by countries and regions. This spectrum is generally considered to be a shared spectrum. That is, as long as the communication equipment in the same or different communication systems meets the regulatory requirements set by the country or region on the spectrum, they can use the spectrum without applying for exclusive spectrum authorization from the government.
  • LBT listen before talk
  • Signal transmission in unlicensed spectrum involves concepts related to channel occupancy, such as channel occupancy time (COT), maximum channel occupancy time (MCOT), COT of network equipment (such as base stations), and COT of terminal equipment.
  • COT channel occupancy time
  • MOT maximum channel occupancy time
  • COT of network equipment such as base stations
  • COT of terminal equipment such as base stations
  • MCOT may refer to the maximum length of time that a communication device is allowed to use a channel of unlicensed spectrum for signal transmission when LBT is successful. It should be understood that MCOT refers to the time occupied by signal transmission. If the channel access priority class (CAPC) of a communication device is different, the MCOT corresponding to the communication device may be different. The maximum value of MCOT can be set to 10ms, for example.
  • CAC channel access priority class
  • COT can refer to the length of time for signal transmission using the channel of unlicensed spectrum after LBT is successful. Within the time length corresponding to COT, the channel occupied by the signal can be discontinuous in the time domain. Generally speaking, a COT cannot exceed 20ms at most. In addition, the time length occupied by the signal transmission within the COT should not exceed MCOT.
  • the COT of a network device is also called the COT initiated by the network device.
  • the COT of a network device can be called the gNB-initiated COT.
  • the COT of a network device can refer to the channel occupancy time obtained after the LBT of the network device is successful.
  • the channel occupancy time of a network device can also be used for uplink transmission of terminal devices under certain conditions.
  • the COT of a terminal device is also called the COT initiated by the terminal device.
  • the COT of the terminal device can be called the UE-initiated COT.
  • the COT of a terminal device can refer to the channel occupancy time obtained by the terminal device after the LBT is successful.
  • Some communication systems introduce a channel access method through LBT.
  • the communication system may also support channel access through short control signaling transmission (SCSt).
  • SCSt short control signaling transmission
  • Type 1 LBT method can also be called multi-slot channel detection with random backoff based on contention window size adjustment.
  • the communication device can initiate channel occupation with a length of T mcot according to the channel access priority p. If the network device uses Type 1 LBT method, the network device can not only send its own data during the channel occupation period, but also share the COT with the terminal device. The so-called sharing of COT with the terminal device means: allowing the terminal device to send data within the time length corresponding to the COT (that is, the COT obtained by the network device through channel access).
  • the terminal device can not only send its own data during the channel occupation period, but also share the COT with the network device.
  • the following table shows the channel access priority and its corresponding parameters when the terminal device performs Type 1 LBT method.
  • m p refers to the number of backoff slots corresponding to the channel access priority p
  • CW p refers to the contention window size corresponding to the channel access priority p
  • CW min,p refers to the minimum value of CW p corresponding to the channel access priority p
  • CW max,p refers to the maximum value of CW p corresponding to the channel access priority p
  • T mcot,p refers to the maximum channel occupancy time length corresponding to the channel access priority p.
  • the Type 2 LBT method (Type 2 LBT method) may also be referred to as a channel access method based on a fixed-length channel monitoring time slot.
  • the Type 2 LBT method includes the Type 2A LBT method (Type 2A LBT method), the Type 2B LBT method (Type 2B LBT method), and the Type 2C LBT method (Type 2C LBT method).
  • the communication device can use a single time slot detection of the channel of 25us. That is, the communication device can start channel detection 25us before data starts to be sent.
  • the 25us channel detection can include a 16us channel detection and a 9us channel detection. If both detection results indicate that the channel is idle, it can be considered that the channel is idle and channel access can be performed.
  • the communication device may use a 16us single time slot channel detection. During the channel detection process, if the communication device detects that the channel is idle for more than 4us in the last 9us, the channel may be considered idle.
  • the communication device can transmit data directly through the channel without channel detection.
  • the time difference between the current transmission and the previous transmission is less than or equal to 16us. In other words, if the time difference between two transmissions is less than or equal to 16us, they can be considered to be the same transmission and channel detection is not required. It should be noted that in the Type 2C LBT mode, the transmission time of the communication device is limited and usually cannot exceed 584us.
  • SCSt is a transmission in which the communication device does not sense whether there are other signals on the channel.
  • SCSt is a communication device used to send management and control frames without sensing whether there are other signals on the channel.
  • the communication device does not need to listen to the channel to access the channel for transmission.
  • the use of SCSt needs to meet certain conditions.
  • the communication device needs to meet one or more of the following conditions: within the observation period of 50ms, the number of times SCSt is used is less than or equal to 50; and within the observation period of 50ms, the duration occupied by SCSt does not exceed 2.5ms.
  • LBT is usually also called channel access
  • the type 1 LBT method can be called the type 1 channel access method
  • the type 2A LBT method can be called the type 2A channel access method
  • the type 2B LBT method can be called the type 2B channel access method
  • the type 2C LBT method can be called the type 2C channel access method.
  • LBT and channel access can be interchangeable.
  • OCB Occupied Channel Bandwidth
  • PSD Power Spectral Density
  • European regulatory requirements include minimum channel bandwidth and maximum power spectrum density.
  • OCB requirements when the terminal uses the channel for data transmission, the occupied channel bandwidth is not less than 80% of the total channel bandwidth; in order to meet the OCB occupancy requirements, SL-U can refer to the interlaced resource block (IRB) structure in NR-U.
  • IRB interlaced resource block
  • a comb tooth resource includes N PRBs that are discrete in the frequency domain.
  • a frequency band includes a total of M comb tooth resources.
  • the mth comb tooth includes PRBs ⁇ m, M+m, 2M+m, 3M+m, ... ⁇ .
  • the numbers in the boxes in the figure represent the comb tooth index.
  • the PRBs included in a comb tooth can also be called IRBs, and the comb teeth can also be called IRBs.
  • resource block set (RB set) may also be introduced in SL-U.
  • the frequency domain resources on the carrier can be divided into several resource block sets, and a guard band can be configured between the resource block sets.
  • one RB set corresponds to a frequency domain width of 20 MHz.
  • the communication device needs to perform Listen before Talk (LBT) on the unlicensed spectrum, and can only send data after LBT is successful.
  • LBT Listen before Talk
  • the granularity of LBT can be one RB set, so one RB set can also be called an LBT subband. That is, if the communication device sends data on a certain RB set, it needs to perform LBT on the corresponding RB set, and transmit after LBT is successful.
  • One RB set includes multiple IRBs.
  • one resource block actually corresponds to one IRB in FIG14 .
  • a BWP configured for a communication device includes an integer number of RB Sets.
  • Figure 15 is an example of a resource pool configured on an unlicensed spectrum applicable to an embodiment of the present application.
  • a resource pool may be configured on an unlicensed spectrum or a shared spectrum for sideline transmission through pre-configuration information or network configuration information.
  • the resource pool includes M1 resource block sets (resource block sets, RB sets), where a resource block set may include M2 resource blocks (resource blocks, RBs), and M1 and M2 are positive integers.
  • an RB set may correspond to a channel in an unlicensed spectrum (or a shared spectrum).
  • an RB set may be a channel in an unlicensed spectrum (or a shared spectrum). Therefore, an RB set may also be referred to as a "channel”.
  • the bandwidth corresponding to the channel on the unlicensed spectrum is 20 MHz, and accordingly, the bandwidth corresponding to the RB set may be 20 MHz.
  • an RB set may correspond to the minimum frequency domain granularity for performing LBT, or in other words, an RB set may correspond to an LBT subband.
  • an RB set may be an LBT subband, and therefore, the RB set may also be called an LBT subband.
  • an RB set may include the number of RBs corresponding to 20 MHz.
  • the minimum frequency domain granularity of LBT is one RB set, that is, 100 RBs.
  • the frequency domain starting position of the resource pool may be determined based on the frequency domain starting position of the first RB set in the M1 RB sets. For example, the frequency domain starting position of the resource pool may be the same as the frequency domain starting position of the first RB set.
  • the first RB set is the RB set with the lowest frequency domain position in the M1 RB sets (or the first RB set).
  • the frequency domain end position of the resource pool may be determined based on the frequency domain end position of the second RB set in the M1 RB sets.
  • the frequency domain end position of the resource pool may be the same as the frequency domain end position of the second RB set.
  • the second RB set is the RB set with the highest frequency domain position in the M1 RB sets (or the last RB set).
  • a guard band also known as a "guard frequency band” may be set between two adjacent RB sets in the M1 RB sets included in the resource pool, where the guard band can be used to separate RB sets.
  • the frequency domain starting position and frequency domain size of the guard band may be determined according to preconfiguration information or network configuration information. Accordingly, the terminal may obtain preconfiguration information or network configuration information, which is used to configure the guard band.
  • guard bands are configured in the sideline bandwidth segment (bandwidth part, BWP), corresponding to guard band 0, guard band 1 and guard band 2 respectively.
  • BWP bandwidth part
  • guard band 1 and guard band 2 respectively.
  • These three guard bands separate four RB sets. According to the frequency domain starting position of each guard band (i.e., the starting point of the guard band shown in the figure) and the frequency domain size of the guard band (i.e., the length of the guard band shown in the figure), the frequency domain starting position and frequency domain ending position of each RB set can be determined.
  • the sidelink BWP may include the above-mentioned four RB sets, and a resource pool (hereinafter referred to as the "resource pool") is configured in the sidelink BWP.
  • the resource pool may include three RB sets, namely, RB set 0 to RB set 2. Therefore, the frequency domain starting position of the resource pool (i.e., the starting point of the resource pool shown in the figure) may be the same as the frequency domain starting position of RB set 0, and the frequency domain ending position of the resource pool (i.e., the end point of the resource pool shown in the figure) may be the same as the frequency domain ending position of RB set 2.
  • one RB set includes one or more sub-channels.
  • each RB set in FIG. 15 may include one or more sub-channels.
  • one PSCCH may be transmitted in one or more RB sets.
  • one PSSCH may be transmitted in one or more RB sets, and the PSSCH occupies one or more subchannels in the one or more RB sets.
  • an RB may include 12 consecutive subcarriers in a time slot, and a PRB may include 12 consecutive subcarriers in an OFDM symbol. It should be noted that, for ease of understanding, the following description is given by taking RB as an example. In an embodiment of the present application, RB may be interchangeable with PRB, that is, in the following scheme involving RB, RB may be replaced by PRB.
  • interleaved resource blocks also known as “interleaved physical resource blocks (interlaced PRB, IRB)", that is, in the scheme involving RB below, RB can also be replaced by interleaved resource blocks.
  • IRB interleaved physical resource blocks
  • RB can also be replaced by interleaved resource blocks.
  • MCSt Multiple consecutive slot transmission
  • the communication device needs to perform LBT first, and can access the channel only after LBT is successful.
  • the communication device can transmit continuously or discontinuously within the corresponding COT.
  • the concept of MCSt transmission may be introduced in SL-U, that is, the communication device can transmit continuously on multiple time slots to improve the utilization rate of COT.
  • the use of MCSt transmission can continuously use/occupy the channel, which is conducive to competing for the channel with foreign systems (for example, Wi-Fi systems) and avoiding foreign systems from accessing the channel through LBT.
  • the SL-U terminal adopts MCSt transmission, since the channel can be continuously occupied within the COT, at this time, Wi-Fi users cannot access the channel through LBT.
  • MCSt can be understood as occupying all time domain resources in multiple time slots for continuous transmission.
  • MCSt can also be understood as occupying part of the time domain resources of one or some time slots in multiple time slots for continuous transmission. In this case, there may be time intervals between the time domain resources occupied by MCSt, but since MCSt occupies each time slot in multiple time slots, it can still be regarded as a continuous transmission.
  • the embodiment of the present application provides a method for side communication to specify the MCSt resources occupied by MCSt in the SL-U system (hereinafter referred to as "first MCSt resources"), which helps to implement MCSt in the SL-U system.
  • first MCSt resources MCSt resources occupied by MCSt in the SL-U system
  • the method for side communication in the embodiment of the present application is introduced below in conjunction with Figure 16.
  • Fig. 16 is a schematic flow chart of a method for sideline communication according to an embodiment of the present application. The method shown in Fig. 16 includes step S1610.
  • step S1610 the terminal device determines the first multi-slot continuous transmission MCSt resource.
  • the first MCSt resource can occupy M consecutive time slots, where M is a positive integer greater than 1.
  • the first MCSt resource occupies M consecutive time slots, which can be understood as the first MCSt resource occupying all time domain resources in the M time slots for continuous transmission.
  • the first MCSt resource can also occupy part of the time domain resources in the M time slots for continuous transmission. In this case, there may be a time interval between the time domain resources occupied by the first MCSt resource, but since the first MCSt resource occupies each time slot in multiple time slots, it can still be regarded as a continuous transmission.
  • the time interval may be shorter than the shortest time required for the alien system to seize resources, so that the alien system may be prevented from seizing transmission resources.
  • the time interval may be, for example, less than or equal to 16 microseconds.
  • the first MCSt resource can be mapped in the sidelink resource pool (hereinafter referred to as "resource pool") with any frequency domain resource granularity, where the frequency domain resource granularity may include: RB, IRB, subchannel, and RB set. That is to say, the first MCSt resource satisfies one of the following in the frequency domain: occupies one or more resource blocks or interleaved PRBs in the resource pool; occupies one or more resource block sets in the resource pool; and occupies one or more subchannels in the resource pool.
  • the number of RBs (or interleaved PRBs) occupied by the first MCSt resource in each time domain unit may be the same or different.
  • the position of the RBs (or interleaved PRBs) occupied by the first MCSt resource in each time domain unit may be the same or different.
  • the first MCSt resource is mapped with a resource block or an interleaved PRB as a granularity, which helps to improve the flexibility of mapping.
  • the first MCSt resource can be mapped with a resource block or an interleaved PRB as a granularity, which helps to make the first MCSt resource located within the COT of the terminal device.
  • the number of RB sets occupied by the first MCSt resource in each time domain unit may be the same or different.
  • the position of the RB set occupied by the first MCSt resource in each time domain unit may be the same or different.
  • terminal devices usually perform LBT with RB sets as the granularity. If the resources for LBT of the terminal device are less than one RB set, LBT failure usually occurs. Therefore, when the first MCSt resource is mapped with RB or subchannel as the granularity, other terminal devices may still initiate LBT on other resources in the RB set occupied by the first MCSt resource, but because some frequency domain resources in the RB set are occupied by the first MCSt resource, LBT fails. If the first MCSt resource is mapped with RB set as the granularity, other terminal devices will not initiate LBT in the RB set because the resources in the RB set are occupied by the first MCSt resource. Therefore, mapping the first MCSt resource with RB set as the granularity helps to avoid invalid LBT initiated by other terminal devices.
  • the number of subchannels occupied by the first MCSt resource in each time domain unit may be the same or different.
  • the positions of the subchannels occupied by the first MCSt resource in each time domain unit may be the same or different.
  • the last symbol of each time slot can be used for transceiver conversion.
  • the last symbol of each time slot can also be used for LBT channel sensing by the terminal device. Therefore, in some implementations, in order to reserve resources for LBT channel sensing for the terminal device (the terminal device or other terminal devices), the first MCSt resource may not occupy the last symbol of one or more time slots in the M time slots in the time domain. Of course, in an embodiment of the present application, the first MCSt resource may occupy the last symbol of one or more time slots in the M time slots in the time domain.
  • the first MCSt resource can occupy the last symbol in the 1st time slot to the M-1th time slot in the M time slots in the time domain.
  • the first MCSt resource does not occupy the last symbol in the Mth time slot, which can be used for LBT channel monitoring.
  • the first MCSt resource can occupy the last symbol from the 1st time slot to the M-1th time slot, which helps to provide appropriate resources for the terminal device to perform MCSt.
  • a symbol can also be reserved for LBT channel listening for the terminal device in the last symbol in the Mth time slot to improve the rationality of the time domain resources occupied by the first MCSt resource.
  • whether the first MCSt resource occupies or does not occupy the last symbol can be determined based on the size of the frequency domain resources occupied by the first MCSt resource in the last symbol.
  • the terminal device in the SL-U system, the terminal device usually performs LBT with the RB set as the frequency domain granularity. Therefore, if the frequency domain resources reserved for LBT on the last symbol are smaller than the RB set, the terminal device usually cannot perform LBT successfully. At this time, LBT channel monitoring on the last symbol can be ignored. Accordingly, in order to improve resource utilization, the first MCSt resource can occupy the last symbol. In other words, if the frequency domain resources occupied by the first MCSt resource in the last symbol are a resource block set, the first MCSt resource occupies the last symbol.
  • the terminal device can perform LBT channel sensing on the RB set of the symbol.
  • the first MCSt resource may not occupy the last symbol, or the first MCSt resource occupies part of the time domain resources in the last symbol.
  • the time not occupied by the first MCSt resource in the last symbol can be used for LBT.
  • the first MCSt resource in the last symbol if the frequency domain resources occupied by the first MCSt resource in the last symbol are part of the frequency domain resources in the resource block set, the first MCSt resource does not occupy the last symbol, or the first MCSt resource occupies part of the time domain resources in the last symbol.
  • the time length corresponding to the resources in the last symbol not occupied by the first MCSt can be 16 microseconds.
  • a time slot may also include PSFCH resources. Therefore, the embodiment of the present application also discusses the relationship between the first MCSt resources and the PSFCH resources.
  • PSFCH resource configuration mode 1 PSFCH resources exist in all RB sets included in the resource pool, or in other words, PSFCH resources occupy all RB sets in the resource pool in the frequency domain.
  • the resource pool includes time slots 1 to 4 in the time domain, and includes RB set 1 and RB set 2 in the frequency domain, and the time domain where the PSFCH resource is located is the symbol T PSFCH in time slot 2 and time slot 4.
  • the resources in the time domain where the PSFCH resource is located are the resources in the symbol T PSFCH where the PSFCH resource is located, that is, the resources in the time domain where the PSFCH resource is located include the symbol T PSFCH in the time domain, and include RB set 1 and RB set 2 in the frequency domain.
  • all resources in the resources in the time domain where the PSFCH resource is located are used to transmit the PSFCH.
  • the resources in the frequency domain where the PSFCH resources are located are RB set 1 and RB set 2 in the resource pool, that is, all RB sets in the resource pool.
  • PSFCH resource configuration mode 2 PSFCH resources exist in some RB sets included in the resource pool, or in other words, PSFCH resources occupy some RB sets in the resource pool in the frequency domain.
  • the resource pool includes time slots 1 to 4 in the time domain and RB sets 1 to 4 in the frequency domain, and the PSFCH resources occupy symbols T PSFCH in time slots 2 and 4, and the frequency domains where the PSFCH resources are located are RB sets 1 and RB sets 2, that is, there are no frequency domain resources for transmitting PSFCH in RB sets 3 and RB sets 4.
  • the resources in the time domain where the PSFCH resources are located are the resources in the symbol T PSFCH where the PSFCH resources are located, that is, the resources in the time domain where the PSFCH resources are located include symbols T PSFCH in the time domain and include RB sets 1 to RB sets 4 in the frequency domain. At this time, part of the resources in the time domain where the PSFCH resources are located are used to transmit PSFCH.
  • the resources in the frequency domain where the PSFCH resources are located are RB set 1 and RB set 2 in the resource pool, that is, part of the RB sets in the resource pool.
  • the first MCSt resource may satisfy one or more of the following: including resources in the time domain where the PSFCH resource is located; including resources in the frequency domain where the PSFCH resource is located; including PSFCH resources; excluding resources in the time domain where the PSFCH resource is located; excluding resources in the frequency domain where the PSFCH resource is located; and excluding PSFCH resources.
  • the first MCSt resource does not include the resources in the time domain where the PSFCH resource is located as an example
  • the first MCSt resource does not include the symbol T PSFCH in the time domain, and does not include RB set 1 and RB set 2 in the frequency domain.
  • the first MCSt resource does not include the symbol T PSFCH in the time domain, and does not include RB set 1 to RB set 4 in the frequency domain.
  • the first MCSt resource includes the symbol T PSFCH in the time domain, and includes RB set 1 and RB set 2 in the frequency domain.
  • the first MCSt resource includes the symbol T PSFCH in the time domain, and includes RB set 1 to RB set 4 in the frequency domain.
  • the first MCSt resource may not include resources in RB set 1 and RB set 2.
  • the first MCSt resource may not include resources in RB set 1 and RB set 2, and accordingly, the first MCSt resource may include RB set 3 to RB set 4.
  • the first MCSt resource may include resources in RB set 1 and RB set 2.
  • the first MCSt resource may include resources in RB set 1 to RB set 4.
  • the first MCSt resource includes RB set 1 and RB set 2 in resource symbol T PSFCH .
  • the first MCSt resource includes RB set 1 and RB set 2 in resource symbol T PSFCH .
  • the first MCSt resource does not include RB set 1 and RB set 2 in resource symbol T PSFCH .
  • the first MCSt resource does not include RB set 1 and RB set 2 in resource symbol T PSFCH .
  • a time slot includes PSFCH resources
  • the time slot will also be provided with AGC symbols for PSFCH reception, and symbols GP for terminal equipment to receive PSFCH for transceiver conversion.
  • the first MCSt resource includes resources in the time domain where the PSFCH resources are located, correspondingly, it may not be necessary to receive PSFCH in the PSFCH resources, then GP symbols and AGC symbols are not needed either. Therefore, in order to improve resource utilization, GP symbols and/or AGC symbols can also be used for MCSt, that is, the first MCSt resource also includes AGC symbols for PSFCH reception, and/or, symbols occupied by GP located before the AGC symbols in the time domain.
  • whether the first MCSt resources include resources in the time domain where the PSFCH resources are located is determined based on a first condition, wherein the first condition can be determined based on one or more of the following: whether the first MCSt resources include resources in the frequency domain where the PSFCH resources are located; whether there is feedback information for the PSFCH resources.
  • the first condition including whether the first MCSt resources include resources in the frequency domain where the PSFCH resources are located as an example, in some implementations, if the first MCSt resources do not include resources in the frequency domain where the PSFCH resources are located, then the first MCSt resources include resources in the time domain where the PSFCH resources are located.
  • the following article takes the PSFCH configuration method shown in Figure 18 as an example to introduce, assuming that the first MCSt resource occupies RB set 3 and RB set 4 in the frequency domain. At this time, the first MCSt resource does not include the resources in the frequency domain where the PSFCH resources are located. Correspondingly, the first MCSt resource can include the resources in the time domain where the PSFCH resources are located, that is, the resources within the symbol T PSFCH .
  • the first MCSt resources if the first MCSt resources include resources in the frequency domain where the PSFCH resources are located, the first MCSt resources do not include resources in the time domain where the PSFCH resources are located.
  • the following article continues to introduce the PSFCH configuration method shown in Figure 18 as an example. It is assumed that the first MCSt resource occupies RB set 1 and RB set 2 in the frequency domain. At this time, the first MCSt resource includes the resources in the frequency domain where the PSFCH resources are located. Correspondingly, the first MCSt resource may not include the resources in the time domain where the PSFCH resources are located, that is, the resources within the symbol T PSFCH .
  • the first MCSt resource may include resources in the time domain where the PSFCH resource is located. In other implementations, if there is feedback information for the PSFCH resource, the first MCSt resource does not include resources in the time domain where the PSFCH resource is located.
  • the above describes how to determine whether the first MCSt resources include resources in the time domain where the PSFCH resources are located when the two first conditions are used separately.
  • the above two first conditions can also be used in combination to determine whether the first MCSt resources include resources in the time domain where the PSFCH resources are located.
  • the determination method is similar to that when the two first conditions are judged separately. For the sake of brevity, it will not be repeated below.
  • the above-mentioned first condition can also be used to determine whether the first MCSt resources include PSFCH resources.
  • the specific judgment method is similar to that described above. For the sake of brevity, it will not be repeated below.
  • PSFCH can be transmitted periodically.
  • M can be less than or equal to the configuration period of PSFCH, which helps to avoid the collision of the first MCSt resource with PSFCH.
  • the configuration period of PSFCH is 2 time slots, that is, there is a symbol containing PSFCH resources in every 2 time slots, therefore, there is a symbol containing PSFCH resources in time slot 2 and time slot 4 respectively, at this time, M is at most 2.
  • M may also be greater than the configuration period of PSFCH.
  • M can be configured to be less than or equal to the configuration period of PSFCH, otherwise, PSFCH may not be transmitted in M time slots.
  • M can also be configured to be greater than the configuration period of PSFCH.
  • M can be configured to be greater than the configuration period of PSFCH.
  • M can also be configured to be less than or equal to the configuration period of PSFCH.
  • the configuration of M can also be associated with the frequency domain resources occupied by the first MCSt resource. For example, if the first MCSt resource occupies one or more resource block sets in the resource pool in the frequency domain, then M is less than or equal to the configuration period of the PSFCH resource. For another example, if the first MCSt resource occupies one or more resource blocks or interleaved PRBs in the resource pool in the frequency domain, then M is greater than the configuration period of the PSFCH resource.
  • the first MCSt resource in the embodiment of the present application is introduced below in combination with Example 1 and Example 2.
  • the first MCSt resource is a set of one or more RBs in M time slots that are continuous in the time domain.
  • the first MCSt resource is one or more RBs in M time slots that are continuous in the time domain.
  • the first MCSt resource occupies M consecutive time slots and occupies all resources of the last symbol in the 1st time slot to the M-1th time slot.
  • the last symbol of the Mth time slot can be used for LBT channel monitoring.
  • the configuration period of the PSFCH resources is 2. If the configured value of M is not greater than the configuration period of the PSFCH resources, the value of M can be 2. In this case, the relationship between the first MCSt resource and the PSFCH resource can be referred to the four implementation methods described below.
  • resources in the symbol where the PSFCH resources are located are not included in M consecutive time slots.
  • the first MCSt resources do not include the RB set within the symbol T PSFCH in time slot 2 and time slot 4, that is, RB set 1 and RB set 2 within the symbol T PSFCH .
  • Implementation method 2 the first MCSt resource does not include PSFCH resources.
  • the first MCSt resource if the first MCSt resource includes an RB set of PSFCH resources in the frequency domain, the first MCSt resource does not include the symbol of the PSFCH resource. Referring to FIG. 18 , if the first MCSt resource includes RB set 1 or RB set 2, the first MCSt resource does not include RB set 1 and RB set 2 within symbol T PSFCH where the PSFCH resource is located.
  • the first MCSt resource may include the symbol T PSFCH where the PSFCH resource is located.
  • the first MCSt resource may include the symbol T PSFCH where the PSFCH resource is located.
  • the first MCSt resource may also include an AGC symbol for PSFCH reception, and a GP symbol located before the AGC symbol.
  • the first MCSt resource can include the symbol T PSFCH where the PSFCH resource is located, it means that the PSFCH is not transmitted to indicate whether the corresponding data is correctly received.
  • different retransmissions of the same data for example, TB
  • different data can also be transmitted in the first MCSt resource.
  • the first MCSt resource may not include the symbol T PSFCH where the PSFCH resources exist, and in the RB set that does not include the PSFCH resources, the first MCSt resource may include the symbol T PSFCH where the PSFCH resources are located.
  • RB set 1 and RB set 2 are RB sets including PSFCH resources.
  • the first MCSt resource may not include the symbol T PSFCH where the PSFCH resource is located.
  • RB set 3 and RB set 4 are RB sets that do not include PSFCH resources.
  • the first MCSt resource may include the symbol T PSFCH where the PSFCH resource is located.
  • the first MCSt resources include PSFCH resources.
  • the first MCSt resource may also include an AGC symbol for PSFCH reception and a GP located before the AGC symbol.
  • multiple common RBs are specified in a certain symbol, and the bandwidth of these multiple common RBs (for example, common interleaved RBs or common RBs) meets the minimum channel occupied bandwidth. Accordingly, on the symbol T PSFCH originally used to transmit the PSFCH, the terminal device can occupy multiple common RBs in the symbol T PSFCH .
  • the first MCSt resource includes PSFCH resources, which means that PSFCH is not transmitted to indicate whether the corresponding data is correctly received.
  • PSFCH resources which means that PSFCH is not transmitted to indicate whether the corresponding data is correctly received.
  • different retransmissions of the same data for example, TB
  • different data can also be transmitted within the first MCSt resource.
  • the first MCSt resource may include the RB set where the PSFCH resource is located.
  • the first MCSt resource may include an AGC symbol for PSFCH reception and a GP located before the AGC symbol.
  • the terminal device may occupy a common RB within the symbol T PSFCH .
  • the target receiving terminal feeds back HARQ information to the terminal device on the PSFCH resources, the first MCSt resources do not include PSFCH resources and AGC symbols for PSFCH reception.
  • Case 1 Assuming that the first MCSt resource occupies M consecutive time slots, accordingly, whether the first MCSt resource occupies the last symbol from the 1st time slot to the M-1th time slot can be divided into the following two cases: Case 1 and Case 2.
  • the first MCSt resource may include the last symbol in each of the above time slots.
  • all resources in RB set 1 belong to the first MCSt resources, and part of the resources in RB set 2 belong to the first MCSt resources. If the RB sets on the last symbol from the 1st time slot to the M-1th time slot are all like RB set 1, the first MCSt resources can occupy the last symbol from the 1st time slot to the M-1th time slot.
  • the first MCSt resource may include part of the resources in the last symbol in each of the above time slots, or the first MCSt resource may not include the last symbol in each of the above time slots.
  • the first MCSt resource can occupy part of the resources within the last symbol from the 1st time slot to the M-1th time slot.
  • the first MCSt resource may not occupy the last symbol from the 1st time slot to the M-1th time slot.
  • the configuration period of the PSFCH resources is 2, and the value of the configuration M can be greater than the configuration period of the PSFCH resources.
  • the relationship between the first MCSt resources and the PSFCH resources can be referred to the four implementation methods described below.
  • the value of M can be greater than the configuration period of the PSFCH resource, which can be understood as PSFCH resources can exist in one or some time slots in the first MCSt resource.
  • the first MCSt resource does not include the AGC symbol for PSFCH reception and the GP symbol before the AGC symbol.
  • Implementation method 1 The first MCSt resource does not include the resources within the symbol where the PSFCH resource is located.
  • the first MCSt resources do not include the RB set within the symbol T PSFCH in time slot 2 and time slot 4, that is, RB set 1 and RB set 2 within the symbol T PSFCH .
  • Implementation method 2 the first MCSt resource does not include PSFCH resources.
  • the first MCSt resource if the first MCSt resource includes an RB set of PSFCH resources in the frequency domain, the first MCSt resource does not include symbols of the PSFCH resources. Referring to FIG18 , if the first MCSt resource includes RB set 1 or RB set 2, the first MCSt resource does not include symbols T PSFCH where the PSFCH resources are located.
  • the first MCSt resource if the first MCSt resource does not include the RB set of the PSFCH resource in the frequency domain, the first MCSt resource includes the symbol of the PSFCH resource. Referring to FIG18 , if the first MCSt resource includes RB set 3 or RB set 4, the first MCSt resource may include the symbol T PSFCH where the PSFCH resource is located.
  • the first MCSt resources include PSFCH resources.
  • the PSFCH resources are RB set 1 and RB set 2 in symbol T PSFCH .
  • the first MCSt resource includes a PSFCH resource, which means that the PSFCH is not transmitted to indicate whether the corresponding data is correctly received.
  • PSFCH resource which means that the PSFCH is not transmitted to indicate whether the corresponding data is correctly received.
  • different retransmissions of the same data e.g., TB
  • different data can also be transmitted within the first MCSt resource.
  • the first MCSt resource may include a PSFCH symbol and an AGC symbol for PSFCH reception.
  • the relationship between the first MCSt resource and the RB set on the PSFCH symbol can be divided into the following two cases:
  • the first MCSt resource includes a common RB (e.g., a common PRB or a common interleaved PRB) within the PSFCH symbol to ensure the minimum channel occupied bandwidth.
  • a common RB e.g., a common PRB or a common interleaved PRB
  • the terminal device can copy the signal sent in the PSFCH symbol.
  • the first MCSt resource may include all PSFCH symbols, the AGC symbol used for PSFCH reception, and the RB set in the GP symbol before the AGC symbol.
  • the scheme of mapping the first MCSt resource with RB as the granularity introduced above is also applicable to mapping the first MCSt resource with sub-channel as the granularity, and the sub-channel may include one or more RBs that are continuous in the frequency domain. Accordingly, the RB in Example 2 can be replaced with a sub-channel, and for the sake of brevity, it will not be described in detail below.
  • mapping the first MCSt resource with RB as the granularity introduced above is also applicable to mapping the first MCSt resource with interleaved PRB as the granularity. Accordingly, the RB in Example 2 can be replaced with interleaved PRB, which will not be described in detail below for the sake of brevity.
  • the traditional resource selection in the sideline system is based on the time slot granularity, which may not match the MCSt. Therefore, how the SL-U system can ensure the MCSt in the resource selection process is an urgent problem to be solved.
  • an embodiment of the present application also provides a method for sideline communication, in which the terminal device can select resources in the sideline resource pool based on a first parameter associated with the MCSt resource to ensure MCSt.
  • the following describes a method for sideline communication according to another embodiment of the present application in conjunction with FIG.
  • FIG. 20 is a schematic diagram of a method for sideline communication according to another embodiment of the present application.
  • the method shown in FIG. 20 includes step S2010.
  • step S2010 the terminal device selects resources in the sidelink resource pool based on the first parameter.
  • the first parameter may include a second parameter, wherein the second parameter may correspond to a time domain resource granularity of the MCSt resource.
  • the time domain resource granularity may be, for example, a time slot, and the time domain resource granularity may also be, for example, a time domain resource group (or "time slot group”), which may include one or more time slots.
  • the second parameter may be used to indicate that the MCSt resources occupy M consecutive time slots in the sidelink resource pool in the time domain, where M is a positive integer greater than 1.
  • the above-mentioned first parameter includes a third parameter, wherein the third parameter corresponds to the frequency domain resource granularity of the MCSt resource, wherein the frequency domain resource granularity may include one or more of RB set, interleaved PRB, RB, and sub-channel.
  • the third parameter can be used to indicate that the MCSt resources occupy one or more resource blocks or interleaved PRBs in the sidelink resource pool in the frequency domain; or, the third parameter is used to indicate that the MCSt resources occupy one or more resource block sets in the resource pool in the frequency domain; or the third parameter is used to indicate that the MCSt resources occupy one or more subchannels in the resource pool in the frequency domain.
  • the second parameter and the third parameter may correspond to a time-frequency domain resource granularity, and the time-frequency domain resource granularity may be used to perform resource exclusion and/or resource selection in the sidelink resource pool.
  • the resource selection process of an embodiment of the present application is described below.
  • the second parameter indicates that the time domain resource granularity of the MCSt resource is M time slots
  • the third parameter indicates that the frequency domain resource granularity of the MCSt resource is N RBs, where N is a positive integer not less than 1.
  • the time-frequency domain resource granularity composed of the second parameter and the third parameter can be N RBs in M time slots.
  • the MAC layer of the terminal device may indicate the second parameter and the third parameter to the physical layer of the terminal device, and accordingly, the physical layer of the terminal device uses the second parameter and the third parameter as resource granularity to perform resource exclusion and resource reporting.
  • R(x,y) in the resource selection process based on resource listening described above may be defined as a resource consisting of N RBs starting with y in M consecutive time slots starting from time slot X, that is, ⁇ M,N ⁇ .
  • the physical layer reports the candidate resource set to the MAC layer.
  • the MAC layer can select MCSt resources consisting of M’ continuous time slots from the candidate resource set, where the value of M’ can be greater than or equal to the value of M corresponding to the candidate resource set.
  • a candidate resource set can be obtained for each resource granularity, and accordingly, the MAC layer can select resources from multiple candidate resource sets.
  • the first parameter may include multiple groups of parameter combinations, each parameter combination includes a second parameter and a third parameter, and the multiple groups of number combinations correspond to multiple time-frequency domain resource granularities, and the multiple time-frequency domain resource granularities are used to exclude resources and/or select resources in the sideline resource pool.
  • a time-frequency domain resource granularity also called "resource granularity”
  • resource granularity of a certain combination of the second parameter and the third parameter can also be used to exclude resources and/or select resources in the sideline resource pool.
  • multiple resource granularities can be expressed as ⁇ M1, N1 ⁇ , ⁇ M2, N2 ⁇
  • the physical layer can exclude resources with ⁇ M1, N1 ⁇ and ⁇ M2, N2 ⁇ as resource granularities, respectively, to obtain candidate resource set S1 and candidate resource set S2, and report candidate resource set S1 and candidate resource set S2 to the MAC layer.
  • candidate resource set S1 corresponds to resource granularity ⁇ M1, N1 ⁇
  • candidate resource set S2 corresponds to resource granularity ⁇ M2, N2 ⁇ .
  • the MAC layer may select MCSt resources from the candidate resource set S1, and the MCSt resources may include M3 consecutive time slots, where M3 may be greater than or equal to M1.
  • the MAC layer may select MCSt resources from the candidate resource set S2, and the MCSt resources may include M3 consecutive time slots, where M3 may be greater than or equal to M2.
  • the second parameter and/or the third parameter may be indicated by the physical layer to the MAC layer.
  • the second parameter and/or the third parameter may also be determined by the physical layer.
  • the MAC layer may indicate the second parameter to the physical layer, and accordingly, the physical layer may determine the third parameter corresponding to the second parameter based on the second parameter and the corresponding relationship between the second parameter and the third parameter.
  • the correspondence between the second parameter and the third parameter may be predefined by the protocol or configured by the network device. Of course, it may also be preconfigured, which is not limited in the embodiments of the present application.
  • the fourth parameter is the total number of first-class resources in the resource selection window of the sidelink resource pool, and the first-class resources have a time-frequency domain resource granularity of N resource blocks within M consecutive time slots, where M is a positive integer greater than 1, and N is a positive integer greater than or equal to 1.
  • the usage of the above-mentioned fourth parameter can be similar to the parameter "Mtotal" involved in the resource selection process based on resource listening in the previous article, that is, the time-frequency resource granularity of the first type of resources can be used to calculate whether the remaining number of resources after resource exclusion meets the ratio x%.
  • the terminal device determines a set of candidate resources based on a fourth parameter, which helps to select a suitable MCSt resource from the set of candidate resources.
  • the second parameter indicates that the time domain resource granularity of the MCSt resource is M time slots
  • the third parameter indicates that the frequency domain resource granularity of the MCSt resource is N RBs.
  • resource exclusion can be performed with N RBs in a single time slot as the resource granularity, that is, resource exclusion is performed with ⁇ 1, N ⁇ as the resource granularity.
  • the fourth parameter may be defined as the number of resources in the resource selection window with a resource granularity of ⁇ 1, N ⁇ .
  • the fourth parameter still represents the number of single-slot resources in the resource selection window, and calculates whether the number of remaining resources satisfies the ratio X with the single-slot resources as the granularity. Assuming that the remaining resources include R resources with a granularity of ⁇ M, N ⁇ , the corresponding number of single-slot resources is M*R, where R is a positive integer greater than 1.
  • resource exclusion is performed with ⁇ 1, N ⁇ as the resource granularity, which can realize resource exclusion with a single time slot as the resource granularity, and helps to avoid selecting resources with too high interference as candidate resources.
  • whether to exclude resources with ⁇ 1, N ⁇ or ⁇ M, N ⁇ as the resource granularity can be determined based on the indication of MAC.
  • the resource granularity can also be determined autonomously by the terminal device.
  • the total number of first-class resources in the first candidate resource set selected from the sidelink resource pool is determined based on a fifth parameter, which is used to indicate a ratio threshold of the total number of first-class resources in the candidate resource set selected from the sidelink resource pool to the total number of first-class resources in the resource selection window of the sidelink resource pool, wherein the first-class resources have a time-frequency domain resource granularity of N resource blocks within M consecutive time slots, wherein M is a positive integer greater than 1, and N is a positive integer greater than or equal to 1.
  • the usage of the fifth parameter mentioned above can be similar to the parameter "x%" involved in the resource selection process based on resource listening in the previous article, that is, the fifth parameter is used to determine whether the total number of candidate resources selected at the time-frequency resource granularity of the first category of resources is sufficient to generate a candidate resource set.
  • RB can be replaced by interleaved PRB. That is to say, the scheme introduced above is also applicable to the scenario of interleaved PRB.
  • IRB will no longer be used as an example in the following description.
  • FIG. 21 is a schematic diagram of a terminal device according to an embodiment of the present application.
  • the terminal device 2100 shown in FIG. 21 includes: a processing unit 2110 .
  • Processing unit 2110 is used to determine a first multi-slot continuous transmission MCSt resource, where the first MCSt resource occupies M consecutive time slots in the time domain, where M is a positive integer greater than 1, and the first MCSt resource satisfies one of the following in the frequency domain: occupies one or more resource blocks or interleaved PRBs in the sidelink resource pool; occupies one or more resource block sets in the sidelink resource pool; and occupies one or more subchannels in the sidelink resource pool.
  • the first MCSt resource occupies or does not occupy the last symbol of one or more time slots among the M time slots in the time domain.
  • the first MCSt resource occupies the last symbol in the 1st time slot to the M-1th time slot in the time domain.
  • whether the first MCSt resource occupies or does not occupy the last symbol is determined based on the frequency domain resources occupied by the first MCSt resource in the last symbol.
  • the first MCSt resource occupies the last symbol; or if the frequency domain resources occupied by the first MCSt resource in the last symbol are part of the frequency domain resources in the resource block set, then the first MCSt resource does not occupy the last symbol, or, the first MCSt resource occupies part of the time domain resources in the last symbol.
  • the first MCSt resources satisfy one or more of the following: including resources in the time domain where the PSFCH resources are located; including resources in the frequency domain where the PSFCH resources are located; including PSFCH resources; excluding resources in the time domain where the PSFCH resources are located; excluding resources in the frequency domain where the PSFCH resources are located; and excluding PSFCH resources.
  • the first MCSt resources include resources in the time domain where the PSFCH resources are located, the first MCSt resources also include AGC symbols for PSFCH reception and/or symbols occupied by GP located before the AGC symbols in the time domain.
  • whether the first MCSt resources include resources in the time domain where the PSFCH resources are located is determined based on a first condition, wherein the first condition is determined based on one or more of the following: whether the first MCSt resources include resources in the frequency domain where the PSFCH resources are located; whether there is feedback information on the PSFCH resources.
  • the first MCSt resources include resources in the frequency domain where the PSFCH resources are located in the frequency domain, then the first MCSt resources do not include resources in the time domain where the PSFCH resources are located in the time domain; and/or, if the first MCSt resources do not include resources in the frequency domain where the PSFCH resources are located in the frequency domain, then the first MCSt resources include resources in the time domain where the PSFCH is located in the time domain.
  • the M is less than or equal to the configuration period of the PSFCH.
  • the M is less than or equal to the configuration period of the PSFCH resource; if the first MCSt resource occupies one or more resource blocks or interleaved PRBs in the sidelink resource pool in the frequency domain, then the M is greater than the configuration period of the PSFCH resource.
  • FIG22 is a schematic diagram of a terminal device according to another embodiment of the present application.
  • the terminal device 2200 shown in FIG22 includes: a processing unit 2210 .
  • the processing unit 2210 is used to select resources in the sidelink resource pool based on a first parameter, wherein the first parameter is associated with a multi-slot continuous transmission MCSt resource.
  • the first parameter includes a second parameter, wherein the second parameter corresponds to the time domain resource granularity of the MCSt resource, and/or the second parameter is used to indicate that the MCSt resource occupies M consecutive time slots in the sidelink resource pool in the time domain, where M is a positive integer greater than 1.
  • the first parameter includes a third parameter
  • the third parameter corresponds to the frequency domain resource granularity of the MCSt resource
  • the third parameter is used to indicate one of the following: the MCSt resource occupies one or more resource blocks or interleaved PRBs in the sidelink resource pool in the frequency domain; the MCSt resource occupies one or more resource block sets in the resource pool in the frequency domain; or the MCSt resource occupies one or more subchannels in the resource pool in the frequency domain.
  • the first parameter includes multiple groups of second parameters and third parameters, the multiple groups of second parameters and third parameters correspond to multiple time-frequency domain resource granularities, and the multiple time-frequency domain resource granularities are used for resource exclusion and/or resource selection in the sidelink resource pool.
  • the fourth parameter is the total number of first-category resources in the resource selection window of the sidelink resource pool, and the first-category resources have a time-frequency domain resource granularity of N resource blocks within M consecutive time slots, where M is a positive integer greater than 1, and N is a positive integer greater than or equal to 1.
  • the total number of first-category resources in the first candidate resource set selected from the sidelink resource pool is determined based on a fifth parameter, and the fifth parameter is used to indicate a ratio threshold of the total number of first-category resources in the candidate resource set selected from the sidelink resource pool to the total number of first-category resources in the resource selection window of the sidelink resource pool, wherein the first-category resources have a time-frequency domain resource granularity of N resource blocks within M consecutive time slots, wherein M is a positive integer greater than 1, and N is a positive integer greater than or equal to 1.
  • the processing unit 2110 may be a processor 2310.
  • the terminal device 2100 may further include a transceiver 2330 and a memory 2320, as specifically shown in FIG. 23 .
  • the processing unit 2210 may be a processor 2310.
  • the terminal device 2200 may further include a transceiver 2330 and a memory 2320, as specifically shown in FIG. 23 .
  • FIG23 is a schematic structural diagram of a communication device according to an embodiment of the present application.
  • the dotted lines in FIG23 indicate that the unit or module is optional.
  • the device 2300 may be used to implement the method described in the above method embodiment.
  • the device 2300 may be a chip, a terminal device, or a network device.
  • the device 2300 may include one or more processors 2310.
  • the processor 2310 may support the device 2300 to implement the method described in the method embodiment above.
  • the processor 2310 may be a general-purpose processor or a special-purpose processor.
  • the processor may be a central processing unit (CPU).
  • the processor may also be other general-purpose processors, digital signal processors (DSP), application specific integrated circuits (ASIC), field programmable gate arrays (FPGA) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components, etc.
  • DSP digital signal processor
  • ASIC application specific integrated circuits
  • FPGA field programmable gate arrays
  • a general-purpose processor may be a microprocessor or the processor may also be any conventional processor, etc.
  • the apparatus 2300 may further include one or more memories 2320.
  • the memory 2320 stores a program, which can be executed by the processor 2310, so that the processor 2310 executes the method described in the above method embodiment.
  • the memory 2320 may be independent of the processor 2310 or integrated in the processor 2310.
  • the apparatus 2300 may further include a transceiver 2330.
  • the processor 2310 may communicate with other devices or chips through the transceiver 2330.
  • the processor 2310 may transmit and receive data with other devices or chips through the transceiver 2330.
  • the present application also provides a computer-readable storage medium for storing a program.
  • the computer-readable storage medium can be applied to a terminal or network device provided in the present application, and the program enables a computer to execute the method performed by the terminal or network device in each embodiment of the present application.
  • the embodiment of the present application also provides a computer program product.
  • the computer program product includes a program.
  • the computer program product can be applied to the terminal or network device provided in the embodiment of the present application, and the program enables the computer to execute the method performed by the terminal or network device in each embodiment of the present application.
  • the embodiment of the present application also provides a computer program.
  • the computer program can be applied to the terminal or network device provided in the embodiment of the present application, and the computer program enables a computer to execute the method executed by the terminal or network device in each embodiment of the present application.
  • the "indication" mentioned can be a direct indication, an indirect indication, or an indication of 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 mean that A indirectly indicates B, for example, A indicates C, B can be obtained through C; it can also mean that there is an association relationship between A and B.
  • B corresponding to A means that B is associated with A, and B can be determined according to A.
  • determining B according to A does not mean determining B only according to A, and B can also be determined according to A and/or other information.
  • the term "corresponding" may indicate that there is a direct or indirect correspondence between the two, or an association relationship between the two, or a relationship of indication and being indicated, configuration and being configured, etc.
  • pre-definition or “pre-configuration” can be implemented by pre-saving corresponding codes, tables or other methods that can be used to indicate relevant information in a device (for example, including a terminal device and a network device), and the present application does not limit the specific implementation method.
  • pre-definition can refer to what is defined in the protocol.
  • the “protocol” may refer to a standard protocol in the communication field, for example, it may include an LTE protocol, an NR protocol, and related protocols used in future communication systems, and the present application does not limit this.
  • the term "and/or" is only a description of the association relationship of the associated objects, indicating that there can be three relationships.
  • a and/or B can represent: A exists alone, A and B exist at the same time, and B exists alone.
  • the character "/" in this article generally indicates that the associated objects before and after are in an "or" relationship.
  • the size of the serial numbers of the above-mentioned processes does not mean the order of execution.
  • the execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.
  • the disclosed systems, devices and methods can be implemented in other ways.
  • the device embodiments described above are only schematic.
  • the division of the units is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed.
  • Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.
  • the units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.
  • each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.
  • the computer program product includes one or more computer instructions.
  • the computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device.
  • the computer instructions can be stored in a computer-readable storage medium, or transmitted from one computer-readable storage medium to another computer-readable storage medium.
  • the computer instructions can be transmitted from a website site, computer, server or data center by wired (e.g., coaxial cable, optical fiber, digital subscriber line (digital subscriber line, DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) mode to another website site, computer, server or data center.
  • the computer-readable storage medium can be any available medium that can be read by a computer or a data storage device such as a server or data center that includes one or more available media integrated.
  • the available medium may be a magnetic medium (e.g., a floppy disk, a hard disk, a magnetic tape), an optical medium (e.g., a digital video disc (DVD)), or a semiconductor medium (e.g., a solid state disk (SSD)), etc.
  • a magnetic medium e.g., a floppy disk, a hard disk, a magnetic tape
  • an optical medium e.g., a digital video disc (DVD)
  • DVD digital video disc
  • SSD solid state disk

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Abstract

本申请提供一种用于侧行通信的方法及终端设备。该方法包括：终端设备确定第一多时隙连续传输MCSt资源，第一MCSt资源在时域上占用连续的M个时隙，M为大于1的正整数，第一MCSt资源在频域上满足以下一种：占用侧行资源池中的一个或多个资源块或交织PRB；占用侧行资源池中的一个或多个资源块集合；以及占用侧行资源池中的一个或多个子信道。本申请实施例提供了一种用于侧行通信的方法，以规定在SL-U系统中进行MCSt所占用的第一MCSt资源，这种第一MCSt资源的定义方式有助于实现在SL-U系统进行MCSt。

Description

用于侧行通信的方法及终端设备 技术领域
本申请涉及通信技术领域，并且更为具体地，涉及一种用于侧行通信的方法及终端设备。
背景技术
在非授权频谱上，通信设备需要先进行先听后说(listen before talk，LBT)，LBT成功后才可以接入信道。当通信设备LBT成功接入信道后，在对应的信道占用时间(channel occupancy time，COT)内，通信设备可以连续传输也可以非连续传输。目前，为了能够更充分地利用LBT成功后发起的COT，在非授权频谱上的侧行链路(sidelink over unlicensed spectrum,SL-U)系统中可能引入MCSt传输的概念，即终端设备可以连续地在多个时隙上进行传输，以提升COT的利用率。基于MCSt的优势，目前讨论到要在SL-U系统中引入MCSt模式，但是，SL-U系统如何支持MCSt传输是亟待解决的问题。
发明内容
本申请提供一种用于侧行通信的方法及终端设备。下面对本申请涉及的各个方面进行介绍。
第一方面，提供了一种用于侧行通信的方法，包括：终端设备确定第一多时隙连续传输MCSt资源，所述第一MCSt资源在时域上占用连续的M个时隙，所述M为大于1的正整数，所述第一MCSt资源在频域上满足以下一种：占用侧行资源池中的一个或多个资源块或交织资源块；占用侧行资源池中的一个或多个资源块集合；以及占用侧行资源池中的一个或多个子信道。
第二方面，提供了一种用于侧行通信的方法，包括：终端设备基于第一参数在侧行资源池中进行资源选择，其中，所述第一参数与多时隙连续传输MCSt资源关联。
第三方面，提供了一种终端设备，包括：处理单元，用于确定第一多时隙连续传输MCSt资源，所述第一MCSt资源在时域上占用连续的M个时隙，所述M为大于1的正整数，所述第一MCSt资源在频域上满足以下一种：占用侧行资源池中的一个或多个资源块或交织资源块；占用侧行资源池中的一个或多个资源块集合；以及占用侧行资源池中的一个或多个子信道。
第四方面，提供了一种终端设备，包括：处理单元，用于基于第一参数在侧行资源池中进行资源选择，其中，所述第一参数与多时隙连续传输MCSt资源关联。
第五方面，提供一种终端设备，包括处理器、存储器以及通信接口，所述存储器用于存储一个或多个计算机程序，所述处理器用于调用所述存储器中的计算机程序，使得所述终端设备执行上述方面的方法中的部分或全部步骤。
第六方面，本申请实施例提供了一种通信系统，该系统包括上述的终端设备。在另一种可能的设计中，该系统还可以包括本申请实施例提供的方案中与终端设备或网络设备进行交互的其他设备。
第七方面，本申请实施例提供了一种计算机可读存储介质，所述计算机可读存储介质存储有计算机程序，所述计算机程序使得通信设备(例如，终端设备)执行上述各个方面的方法中的部分或全部步骤。
第八方面，本申请实施例提供了一种计算机程序产品，其中，所述计算机程序产品包括存储了计算机程序的非瞬时性计算机可读存储介质，所述计算机程序可操作来使通信设备(例如，终端设备)执行上述各个方面的方法中的部分或全部步骤。在一些实现方式中，该计算机程序产品可以为一个软件安装包。
第九方面，本申请实施例提供了一种芯片，该芯片包括存储器和处理器，处理器可以从存储器中调用并运行计算机程序，以实现上述各个方面的方法中所描述的部分或全部步骤。
本申请实施例提供了一种用于侧行通信的方法，以规定在SL-U系统中进行MCSt所占用的第一MCSt资源，即，第一MCSt资源在时域上可以占用连续的M个时隙，第一MCSt资源在频域上满足以下一种：占用资源池中的一个或多个资源块或交织资源块；占用资源池中的一个或多个资源块集合；以及占用资源池中的一个或多个子信道。这种第一MCSt资源的定义方式有助于实现在SL-U系统进行MCSt。
附图说明
图1为可应用本申请实施例的无线通信系统的系统架构示例图。
图2为网络覆盖内的侧行通信的场景示例图。
图3为部分网络覆盖的侧行通信的场景示例图。
图4为网络覆盖外的侧行通信的场景示例图。
图5是基于中央控制节点的侧行通信的场景示例图。
图6为基于广播的侧行通信方式的示例图。
图7为基于单播的侧行通信方式的示例图。
图8为基于组播的侧行通信方式的示例图。
图9示出了侧行通信中一种物理层结构的示意图。
图10示出了侧行通信中另一种物理层结构的示意图。
图11示出了侧行通信系统中资源预留的方法的示意图。
图12示出了侧行通信系统中基于侦听的资源选择方法的示意图。
图13示出了侧行通信系统中基于侦听的资源选择方法的示意图。
图14是本申请实施例适用的非授权频谱上的资源映射方式的示意图。
图15是本申请实施例适用的非授权频谱上配置的资源池的示例。
图16是本申请实施例的用于侧行通信的方法的示意性流程图。
图17示出了本申请实施例的PSFCH资源配置方式的示意图。
图18示出了本申请另一种实施例的PSFCH资源配置方式的示意图。
图19示出了本申请实施例中第一MCSt资源与最后一个符号内资源之间的关系的示意图。
图20是本申请另一实施例的用于侧行通信的方法的示意图。
图21是本申请实施例的终端设备的示意图。
图22是本申请另一实施例的终端设备的示意图。
图23是本申请实施例的通信装置的示意性结构图。
具体实施方式
下面将结合附图，对本申请中的技术方案进行描述。
通信系统架构
图1是可应用本申请实施例的无线通信系统100的系统架构示例图。该无线通信系统100可以包括网络设备110和终端设备120。网络设备110可以是与终端设备120通信的设备。网络设备110可以为特定的地理区域提供通信覆盖，并且可以与位于该覆盖区域内的终端设备120进行通信。
图1示例性地示出了一个网络设备和一个终端设备，可选地，该无线通信系统100可以包括一个或多个网络设备110和/或一个或多个终端设备120。针对一个网络设备110，该一个或多个终端设备120可以均位于该网络设备110的网络覆盖范围内，也可以均位于该网络设备110的网络覆盖范围外，也可以一部分位于该网络设备110的覆盖范围内，另一部分位于该网络设备110的网络覆盖范围外，本申请实施例对此不做限定。
可选地，该无线通信系统100还可以包括网络控制器、移动管理实体等其他网络实体，本申请实施例对此不作限定。
应理解，本申请实施例的技术方案可以应用于各种通信系统，例如：第五代(5th generation，5G)系统或新无线(new radio，NR)、长期演进(long term evolution，LTE)系统、LTE频分双工(frequency division duplex，FDD)系统、LTE时分双工(time division duplex，TDD)等。本申请提供的技术方案还可以应用于未来的通信系统，如第六代移动通信系统，又如卫星通信系统，等等。
本申请实施例中的终端设备也可以称为用户设备(user equipment，UE)、接入终端、用户单元、用户站、移动站、移动台(mobile station，MS)、移动终端(mobile Terminal，MT)、远方站、远程终端设备、移动设备、用户终端、无线通信设备、用户代理或用户装置。本申请实施例中的终端设备可以是指向用户提供语音和/或数据连通性的设备，可以用于连接人、物和机，例如具有无线连接功能的手持式设备、车载设备等。本申请的实施例中的终端设备可以是手机(mobile phone)、平板电脑(Pad)、笔记本电脑、掌上电脑、移动互联网设备(mobile internet device，MID)、可穿戴设备、车辆、工业控制(industrial control)中的无线终端、无人驾驶(self driving)中的无线终端、远程手术(remote medical surgery)中的无线终端、智能电网(smart grid)中的无线终端、运输安全(transportation safety)中的无线终端、智慧城市(smart city)中的无线终端、智慧家庭(smart home)中的无线终端等。例如，终端设备可以充当调度实体，其在车辆外联(vehicle-to-everything，V2X)或设备到设备通信(device-to-device，D2D)等中的终端设备之间提供侧行链路信号。比如，蜂窝电话和汽车利用侧行链路信号彼此通信。蜂窝电话和智能家居设备之间通信，而无需通过基站中继通信信号。可选地，终端设备可以用于充当基站。
本申请实施例中的网络设备可以是用于与终端设备通信的设备，该网络设备也可以称为接入网设备或无线接入网设备，如网络设备可以是基站。本申请实施例中的网络设备可以是指将终端设备接入到无线网络的无线接入网(radio access network，RAN)节点(或设备)。基站可以广义的覆盖如下中的 各种名称，或与如下名称进行替换，比如：节点B(NodeB)、演进型基站(evolved NodeB，eNB)、下一代基站(next generation NodeB，gNB)、中继站、接入点、传输点(transmitting and receiving point，TRP)、发射点(transmitting point，TP)、主站MeNB、辅站SeNB、多制式无线(MSR)节点、家庭基站、网络控制器、接入节点、无线节点、接入点(access piont，AP)、传输节点、收发节点、基带单元(base band unit，BBU)、射频拉远单元(Remote Radio Unit，RRU)、有源天线单元(active antenna unit，AAU)、射频头(remote radio head，RRH)、中心单元(central unit，CU)、分布式单元(distributed unit，DU)、定位节点等。基站可以是宏基站、微基站、中继节点、施主节点或类似物，或其组合。基站还可以指用于设置于前述设备或装置内的通信模块、调制解调器或芯片。基站还可以是移动交换中心以及设备到设备D2D、V2X、机器到机器(machine-to-machine，M2M)通信中承担基站功能的设备、6G网络中的网络侧设备、未来的通信系统中承担基站功能的设备等。基站可以支持相同或不同接入技术的网络。本申请的实施例对网络设备所采用的具体技术和具体设备形态不做限定。
基站可以是固定的，也可以是移动的。例如，直升机或无人机可以被配置成充当移动基站，一个或多个小区可以根据该移动基站的位置移动。在其他示例中，直升机或无人机可以被配置成用作与另一基站通信的设备。
在一些部署中，本申请实施例中的网络设备可以是指CU或者DU，或者，网络设备包括CU和DU。gNB还可以包括AAU。
网络设备和终端设备可以部署在陆地上，包括室内或室外、手持或车载；也可以部署在水面上；还可以部署在空中的飞机、气球和卫星上。本申请实施例中对网络设备和终端设备所处的场景不做限定。
不同网络覆盖情况下的侧行通信
侧行通信指的是基于侧行链路的通信技术。侧行通信例如可以是设备到设备(device to device，D2D)或车联网(vehicle to everything，V2X)通信。传统的蜂窝系统中的通信数据在终端设备和网络设备之间进行接收或者发送，而侧行通信支持在终端设备与终端设备之间直接进行通信数据传输。相比于传统的蜂窝通信，终端设备与终端设备直接进行通信数据的传输可以具有更高的频谱效率以及更低的传输时延。例如，车联网系统采用侧行通信技术。
在侧行通信中，根据终端设备所处的网络覆盖的情况，可以将侧行通信分为网络覆盖内的侧行通信，部分网络覆盖的侧行通信，及网络覆盖外的侧行通信。
图2为网络覆盖内的侧行通信的场景示例图。在图2所示的场景中，两个终端设备120a均处于网络设备110的覆盖范围内。因此，两个终端设备120a均可以接收网络设备110的配置信令(本申请中的配置信令也可替换为配置信息)，并根据网络设备110的配置信令确定侧行配置。在两个终端设备120a均进行侧行配置之后，即可在侧行链路上进行侧行通信。
图3为部分网络覆盖的侧行通信的场景示例图。在图3所示的场景中，终端设备120a与终端设备120b进行侧行通信。终端设备120a位于网络设备110的覆盖范围内，因此终端设备120a能够接收到网络设备110的配置信令，并根据网络设备110的配置信令确定侧行配置。终端设备120b位于网络覆盖范围外，无法接收网络设备110的配置信令。在这种情况下，终端设备120b可以根据预配置(pre-configuration)信息和/或位于网络覆盖范围内的终端设备120a发送的物理侧行广播信道(physical sidelink broadcast channel，PSBCH)中携带的信息确定侧行配置。在终端设备120a和终端设备120b均进行侧行配置之后，即可在侧行链路上进行侧行通信。
图4为网络覆盖外的侧行通信的场景示例图。在图4所示的场景中，两个终端设备120b均位于网络覆盖范围外。在这种情况下，两个终端设备120b均可以根据预配置信息确定侧行配置。在两个终端设备120b均进行侧行配置之后，即可在侧行链路上进行侧行通信。
基于中央控制节点的侧行通信
图5为基于中央控制节点的侧行通信的场景示例图。在该侧行通信场景中，多个终端设备可以构成一个通信组，且该通信组内具有中央控制节点。该中央控制节点可以为通信组内的一个终端设备(如图5中的终端设备1)，该终端设备又可以称为簇头(cluster header，CH)终端设备。该中央控制节点可以负责完成以下功能中的一项或多项：通信组的建立，通信组的组成员的加入和离开，在通信组内进行资源协调，为其他终端设备分配侧行传输资源，接收其他终端设备的侧行反馈信息，以及与其他通信组进行资源协调。
侧行通信的模式
某些标准或协议(如第三代合作伙伴计划(3rd Generation Partnership Project，3GPP))定义了两种侧行通信的模式：第一模式和第二模式。
在第一模式下，终端设备的资源(本申请提及的资源也可称为传输资源，如时频资源)是由网络设备分配的。终端设备可以根据网络设备分配的资源在侧行链路上进行数据的发送。网络设备可以为终端 设备分配单次传输的资源，也可以为终端设备分配半静态传输的资源。该第一模式可以应用于有网络设备覆盖的场景，如前文图2所示的场景。在图2所示的场景中，终端设备120a位于网络设备110的网络覆盖范围内，因此网络设备110可以为终端设备120a分配侧行传输过程中使用的资源。
在第二模式下，终端设备可以自主在资源池(resource pool，RP)中选取一个或多个资源。然后，终端设备可以根据选择出的资源进行侧行传输。例如，在图4所示的场景中，终端设备120b位于小区覆盖范围外。因此，终端设备120b可以在预配置的资源池中自主选取资源进行侧行传输。或者，在图2所示的场景中，终端设备120a也可以在网络设备110配置的资源池中自主选取一个或多个资源进行侧行传输。
侧行通信的数据传输方式
某些侧行通信系统(如长期演进-车联网(long term evolution vehicle to everything，LTE-V2X))支持基于广播的数据传输方式(下文简称广播传输)。对于广播传输，接收端终端可以为发送端终端周围的任意一个终端设备。以图6为例，终端设备1是发送端终端，该发送端终端对应的接收端终端是终端设备1周围的任意一个终端设备，例如可以是图6中的终端设备2-终端设备6。
除了广播传输之外，某些通信系统还支持基于单播的数据传输方式(下文简称单播传输)和/或基于组播的数据传输方式(下文简称组播传输)。例如，新无线-车联网(new radio vehicle to everything，NR-V2X)希望支持自动驾驶。自动驾驶对车辆之间的数据交互提出了更高的要求。例如，车辆之间的数据交互需要更高的吞吐量、更低的时延、更高的可靠性、更大的覆盖范围、更灵活的资源分配方式等。因此，为了提升车辆之间的数据交互性能，NR-V2X引入了单播传输和组播传输。
对于单播传输，接收端终端一般只有一个终端设备。以图7为例，终端设备1和终端设备2之间进行的是单播传输。终端设备1可以为发送端终端，终端设备2可以为接收端终端，或者终端设备1可以为接收端终端，终端设备2可以为发送端终端。
对于组播传输，接收端终端可以是一个通信组内的终端设备，或者，接收端终端可以是在一定传输距离内的终端设备。以图8为例，终端设备1、终端设备2、终端设备3和终端设备4构成一个通信组。如果终端设备1发送数据，则该组内的其他终端设备(终端设备2至终端设备4)均可以是接收端终端。
侧行通信的物理层结构
下文结合图9至图10介绍本申请实施例适用的侧行链路系统帧的帧结构。图9示出了NR-V2X中不承载物理侧行反馈信道(physical sidelink feedback channel，PSFCH)的系统帧的帧结构。图10示出了NR-V2X中承载有PSFCH的系统帧的帧结构。
参见图10，在时域上，PSCCH占用的侧行符号从系统帧的第二个侧行符号(例如，正交频分复用(orthogonal frequency division multiplexing，OFDM)符号)开始，占用2个或3个侧行符号。在频域上，物理侧行控制信道(physical sidelink control channel，PSCCH)可以占用{10,12 15,20,25}个物理资源块(physical resource block，PRB)。通常，为了降低终端设备对PSCCH进行盲检测的复杂度，在一个资源池内只允许配置一种PSCCH符号个数和PRB个数。另外，由于子信道为NR-V2X中规定PSSCH资源分配的最小粒度，PSCCH占用的PRB个数必须小于或等于资源池内一个子信道中包含的PRB个数，以免对物理侧行共享信道(physical sidelink shared channel，PSSCH)的资源选择或分配造成额外的限制。
继续参见图9，在时域上，PSSCH也是从系统帧的第二个侧行符号开始，直到系统帧的倒数第二个侧行符号结束。在频域上，PSSCH占据系统帧的K1个子信道，每个子信道包括K2个连续的PRB，K1和K2为正整数。
通常，系统帧的最后一个符号为保护间隔(guard period，GP)符号。另外，系统帧的第一个侧行符号是第二个侧行符号的重复，通常终端接收该系统帧时可以将第一个侧行符号用作自动增益控制(automatic gain control，AGC)符号，AGC符号上的数据通常不用于数据解调。
参见图10所示，在一个时隙内，第一个OFDM符号固定用于自动增益控制(Automatic Gain Control，AGC)，在AGC符号上，UE复制第二个符号上发送的信息。而时隙的最后一个符号为保护间隔，用于收发转换，用于UE从发送(或接收)状态转换到接收(或发送)状态。在剩余的OFDM符号中，PSCCH可以占用从第二个侧行符号开始的两个或三个OFDM符号。在频域上，PSCCH占据的PRB在一个PSSCH的子信道范围内，如果PSCCH占用的PRB个数小于PSSCH的一个子信道的大小，或者，PSSCH的频域资源包括多个子信道，则在PSCCH所在的OFDM符号上，PSCCH可以和PSSCH频分复用。
PSCCH中用于承载第一阶SCI，主要包含资源侦听相关的域，方便其他UE解码后进行资源排除与资源选择。在PSSCH中，除了数据外，还承载第二阶SCI，第二侧行控制信息主要包括数据解调相关的域，方便其他UE解调该PSSCH中的数据。
在NR-V2X中，PSFCH资源是周期性配置的，周期可以为{0,1,2,4}个时隙，如果为0，表示当前资源池内没有PSFCH资源配置，而以2或4个时隙为周期可以降低PSFCH占用的系统资源。如果在一个时隙内存在PSFCH资源，则PSFCH位于时隙内的倒数第二个OFDM符号。由于在PSFCH所在的OFDM符号上UE的接收功率可能发生变化，所在时隙内的倒数第三个符号也将用于PSFCH发送，以辅助接收UE进行AGC调整，倒数第三个符号上的信号是倒数第二个符号上信号的重复。此外，发送PSSCH的UE和发送PSFCH的UE可能不同，因此，在两个PSFCH符号之前，需要额外增加一个符号用于UE的收发转换。
侧行通信的资源预留
如上文侧行通信模式的介绍，在模式二中，终端设备可以自主选择侧行资源发送数据。资源预留可以理解为是支持终端设备进行资源选择的前提。资源预留是指终端设备可以在PSCCH承载的第一侧行控制信息中预留已选的侧行资源(例如，时频资源)。
目前，在侧行通信系统中，既支持TB内的资源预留也支持TB间的资源预留。下文结合图11介绍。
参见图11，终端设备发送第一侧行控制信息(sidelink control information，SCI)，利用送第一SCI中的时域资源分配(time resource assignment)域和频域资源分配(frequency resource assignment)域指示用于当前TB传输的N个时频资源(包括当前发送传输块(transport block，TB)所用的时频资源)。通常，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可以分布在W个时隙内。在NR V2X中，W等于32。
继续参见图11，在传输TB 1的过程中，终端设备可以在PSSCH发送初传数据的同时在PSCCH中发送第一SCI，并利用第一SCI中的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。通常，初传和重传1在时域上分布在32个时隙内。
同理，继续参见图11，在传输TB 1的过程中，终端设备可以利用重传1的PSCCH中发送的第一SCI指示重传1和重传2的时频资源。其中，重传1的时频资源与重传2的时频资源在时域上可以分布在32个时隙内。
另外，终端设备发送第一SCI时，可以利用第一SCI中的资源预留周期(resource reservation period)域进行TB间的资源预留。
继续参见图11，终端设备在发送指示TB 1的初传资源的第一SCI时，可以利用第一SCI中的时域资源分配域和频域资源分配域指示TB 1初传和重传1的时频资源位置，记为{(t1,f1),(t2,f2)}。其中t1、t2表示TB 1初传和重传1资源的时域位置，f1、f2代表TB 1初传和重传1资源的频域位置。如果第一SCI中资源预留周期域的取值为100毫秒，则第一SCI同时指示了时频资源{(t1+100,f1),(t2+100,f2)}，这两个资源用于TB 2初传和重传1的传输。
同理，在TB 1的重传1资源上发送的第一SCI，也可以利用资源预留周期域预留了TB 2重传1和重传2的时频资源。在NR V2X中，资源预留周期域可能的取值为0、1-99、100、200、300、400、500、600、700、800、900、1000毫秒，相比较LTE V2X更为灵活。但在每个资源池中，通常只配置了其中的e种取值，终端设备可以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小于或等于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。当去激活TB间的预留时，第一SCI中不包括资源预留周期域。一般情况下，在触发资源重选之前，终端设备所用的资源预留周期域的取值，即资源预留周期都不会变，终端设备每发送一次第一SCI，都利用其中的“资源预留周期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二下，该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SCI，从而得知其他终端设备所预留的资源。该终端设备接下来在进行资源选择时，会排除上述其他终端设备预留的资源，从而避免资源碰撞。下文结合图12和图13介绍侧行通信系统中基于侦听的资源选择方法。
基于侦听的资源选择方法
参见图12，终端设备可以在时隙n触发资源选择或重选。在一些实现方式中，时隙n可以是高层(例如MAC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，表示为[n+T 1，n+T 2]。其中，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}*2μ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。
在资源选择之前，终端设备需要在n-T 0到n-T proc,0的侦听窗内进行资源侦听，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1，2，4个时隙。通常来说，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SCI。若在时隙n触发资源选择或重选后，终端设备可以使用n-T 0到n-T proc,0进行资源侦听的结果。下文结合步骤1至步骤2，介绍资源选择过程。
步骤1(Step1)，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候选可用资源作为资源集合A(下文中又称“候选资源集合”)。
在一些实现方式中，终端设备可以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，资源集合A中的任意一个单时隙资源记为R(x,y)，x和y分别指示资源的频域位置和时域位置，表示时隙x内以子信道y为起点的连续一个或多个子信道。记资源集合A中资源的初始数量为Mtotal。终端设备可以根据资源侦听窗内的未侦听时隙(情况1-1)和/或资源侦听窗内的资源侦听结果(情况1-2)对资源集合A中的资源进行排除。终端判断资源R(x,y)或与资源R(x,y)对应的一系列周期性资源是否与情况1-1中根据未侦听时隙确定的时隙或情况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)。
下文分别介绍情况1-1以及1-2。
情况1-1：如果终端在侦听窗内时隙m发送数据，没有进行侦听，则终端将根据时隙m和终端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 PCTCN2022122706-appb-000001
(
Figure PCTCN2022122706-appb-000002
表示上取整)。Tscal等于T2转化为毫秒后的值。Prx为终端所用资源池允许的资源预留周期的一种。可选的，与资源R(x,y)对应的一系列周期性资源为与R(x,y)频域位置相同，时域上存在固定时间间隔的C resel个资源,其中C resel与终端生成的随机计数值相关，例如，所述时间间隔根据终端的资源预留周期Ptx确定。例如图12中为C resel为3的情况，表示与资源R(x,y)对应的3个周期性资源(包括R(x,y))。
例如图12，终端在时隙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12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12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个时隙。
终端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)。
可选的，当终端所用资源池去激活TB间的预留时，终端可以不执行上述情况1-1。
可选的，当执行完情况1-1后，如果资源集合A中剩余资源小于X*Mtotal，则将资源集合A初始化为资源选择窗内所有属于终端所用资源池的可用资源再执行情况1-2。
情况1-2：如果终端在侦听窗内时隙m内侦听到PSCCH中传输的第一侧行控制信息，测量该PSCCH的侧行参考信号接收功率(sidelink reference signal receiving power，SL-RSRP)或者该PSCCH调度的PSSCH的SL-RSRP(即与该PSCCH在同一时隙中发送的对应的PSSCH的SL-RSRP)。
如果测量的SL-RSRP大于SL-RSRP阈值，且UE收到的SCI中包含资源预留周期(resource reservation period)域，则终端将根据时隙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“时域资源分配(time resource assignment)”和“频域资源分配(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 PCTCN2022122706-appb-000003
Tscal等于T2转化为毫秒后的值。Prx为侦听到的第一侧行控制信息中携带的资源预留周期。可选的，与资源R(x,y)对应的一系列周期性资源为与R(x,y)频域位置相同，时域上存在固定时间间隔的C resel个资源，其中C resel与终端生成的随机计数值相关，例如，所述时间间隔根据终端的资源预留周期Ptx确定。例如图13示出了C resel为3的情况，表示与资源R(x,y)对应的3个周期性资源(需要说明的是，3个周期性资源包括R(x,y))。
参见图13，当UE收到的SCI包括资源预留周期域，如果终端在时隙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Prx，假定Q值计算为1，终 端将假定在从时隙m开始以Prx为间隔的下一个时隙(即资源4所在的时隙)上也收到了相同内容的第一侧行控制信息。终端将判断在时隙m收到的第一侧行控制信息和上述假定将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)。
如果终端测量的SL-RSRP大于SL-RSRP阈值，且终端收到的SCI中不包括resource reservation period域，则终端只判断在时隙m收到的第一侧行控制信息的“Time resource assignment”域与“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)。
继续参见图13，当终端收到的SCI中不包括resource reservation period域，如果终端在时隙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Mtotal*X，则将SL-RSRP阈值抬升3dB，重新执行步骤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。
步骤2(Step2)，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。
在一些实现方式中，步骤1可以由终端设备的物理层执行，相应地，步骤2中的高层可以是相对于物理层的高层，例如，MAC层。
在资源选择过程中，需要注意以下几点。
1，上述RSRP阈值是由终端侦听到的PSCCH中携带的优先级P1和终端待发送数据的优先级P2决定的。终端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。
当终端侦听到其他UE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，终端通过查表1的方式确定SL-RSRP阈值。
2，终端利用测量到的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。
非授权频谱
非授权频谱是国家和地区划分的可用于无线电设备通信的频谱，该频谱通常被认为是共享频谱。也就是说，相同或不同通信系统中的通信设备只要满足国家或地区在该频谱上设置的法规要求，就可以使用该频谱，不需要向政府申请专有的频谱授权。
为了让使用非授权频谱进行无线通信的各个通信设备(或通信系统)在该频谱上能够友好共存，一些国家或地区规定了使用非授权频谱需要满足的法规要求。例如，通信设备遵循“先听后说(listen before talk，LBT)”原则。所谓LBT，指的是通信设备在非授权频谱的信道上进行信号发送前，需要先进行信道侦听(sensing)。如果信道侦听结果为信道空闲，则该通信设备可以使用非授权频谱的信道进行信号发送；如果信道侦听结果为信道忙，则通常不允许该通信设备使用非授权频谱的信道进行信号发送。
在非授权频谱上的信号传输涉及信道占用相关的概念。例如，信道占用时间(channel occupancy time，COT)，最大信道占用时间(maximum channel occupancy time，MCOT)，网络设备(如基站)的COT，以及终端设备的COT。
MCOT可以指在LBT成功的情况下，允许通信设备使用非授权频谱的信道进行信号传输的最大时间长度。应当理解的是，MCOT指的是信号传输占用的时间。通信设备的信道接入优先级(channel access priority class，CAPC)不同，则通信设备对应的MCOT可能会不同。MCOT的最大取值例如可以设置为10ms。
COT可以指LBT成功后使用非授权频谱的信道进行信号传输的时间长度。在COT对应的时间长度内，信号占用的信道在时域上可以是不连续的。通常而言，一次COT最长不能超过20ms。此外，该COT内的信号传输占用的时间长度不应该超过MCOT。
网络设备的COT也称为网络设备发起的COT。以网络设备为gNB为例，则网络设备的COT可以称为gNB发起的COT(gNB-initiated COT)。网络设备的COT可以指网络设备LBT成功后获得的一次信道占用时间。网络设备的信道占用时间除了可以用于下行传输，也可以在满足一定条件下用于终端设备进行上行传输。
终端设备的COT也称为终端设备发起的COT。以终端设备为UE为例，则终端设备的COT可以称为UE发起的COT(UE-initiated COT)。终端设备的COT可以指在终端设备在LBT成功后获得的一次信道占用时间。
非授权频谱或共享频谱的信道接入方式
某些通信系统(如NR-U系统)引入了通过LBT进行信道接入的信道接入方式。此外，该通信系统还可能支持通过短控制信令传输(short control signaling transmission，SCSt)的方式进行信道接入。下面分别介绍上述两种信道接入方式。
前文已经对LBT的基本概念进行了介绍，这里重点介绍几种不同类型的LBT方式(即基于LBT的几种不同类型的信道接入方式)。
类型1的LBT方式(Type1的LBT方式)也可称为基于竞争窗口大小调整的随机回退的多时隙的信道检测。在类型1的LBT方式中，通信设备可以根据信道接入优先级p发起长度为T mcot的信道占用。如果网络设备使用类型1的LBT方式，则该网络设备除了可以在信道占用期间发送自己的数据，还可以将COT共享给终端设备。所谓将COT共享给终端设备指的是：允许终端设备在该COT(即网络设备通过信道接入得到的COT)对应的时长内发送数据。相应地，如果终端设备使用类型1的LBT方式，则该终端设备除了可以在信道占用期间发送自己的数据，还可以将COT共享给网络设备。下表给出了终端设备进行类型1的LBT方式时的信道接入优先级及其对应的参数。
表1不同信道优先级对应的信道接入参数
p m p CW min,p CW max,p T mcot,p 允许的CW p取值
1 2 3 7 2ms {3,7}
2 2 7 15 4ms {7,15}
3 3 15 1023 6或10ms {15,31,63,127,255,511,1023}
4 7 15 1023 6 or 10ms {15,31,63,127,255,511,1023}
在上述表1中，m p指的是信道接入优先级p对应的回退时隙个数，CW p指的是信道接入优先级p对应的竞争窗口大小，CW min,p指的是信道接入优先级p对应的CW p取值的最小值，CW max,p指的是信道接入优先级p对应的CW p取值的最大值，T mcot,p指的是信道接入优先级p对应的信道最大占用时间长度。在表1所示的4种信道接入优先级中，p＝1为最高优先级。
类型2的LBT方式(Type2的LBT方式)也可称为基于固定长度的信道监听时隙的信道接入方式。类型2的LBT方式包括类型2A的LBT方式(Type2A的LBT方式)，类型2B的LBT方式(Type2B的LBT方式)，以及类型2C的LBT方式(Type2C的LBT方式)。
在类型2A的LBT方式中，通信设备可以采用25us的信道的单时隙检测。也就是说，通信设备可以在数据开始发送前25us开始信道检测。25us的信道检测可以包括1个16us的信道检测和1个9us的信道检测。如果两次检测结果均指示信道空闲，则可以认为信道是空闲的，并可以进行信道接入。
在类型2B的LBT方式中，通信设备可以采用16us的单时隙的信道检测。在信道检测过程中，如果通信设备检测到在最后的9us的时间内，信道在4us以上的时间是空闲，则可以认为信道是空闲的。
在类型2C的LBT方式中，通信设备可以不进行信道检测，直接通过信道传输数据。在类型2C的LBT方式中，本次传输距离上一次传输之间时间差小于或等于16us。也就是说，如果两次传输的时间差小于或等于16us，则可以认为是同一次的传输，不需要进行信道检测。需要说明的是，在类型2C的LBT方式中，通信设备的传输时长是有限制的，通常不能超过584us。
上文介绍了基于LBT的信道接入方式，下面介绍SCSt。在非授权频谱上，为了提高通信设备在传输控制信令时接入信道的成功率，引入了SCSt。SCSt是通信设备不感测信道是否存在其他信号的传输。例如，SCSt是通信设备用于发送管理和控制帧而不感测信道是否存在其他信号的传输。换句话说，当通信设备采用SCSt时，该通信设备不需要对信道进行侦听即可接入信道进行传输。但是，采用SCSt需要满足一定的条件。例如，如果通信设备希望采用SCSt进行信道接入，则该通信设备需要满足如下条件中的一种或多种：在50ms的观察期间内，采用SCSt的次数小于或等于50；以及在50ms的观察期间内，SCSt占据的时长不超过2.5ms。
需要说明的是，LBT通常又称为信道接入，类型1的LBT方式可以称为类型1的信道接入方式，类型2A的LBT方式可以称为类型2A的信道接入方式，类型2B的LBT方式可以称为类型2B的信道接入方式，类型2C的LBT方式可以称为类型2C的信道接入方式。在本申请实施例中，LBT和信道接入可以互相替换。
SL-U系统中的资源块集合
当NR SL技术工作在非授权频谱上，系统设计需要考虑相关区域的法规需求，如信道占用带宽(Occupied Channel Bandwidth，OCB)和功率谱密度(Power Spectral Density，PSD)需求。例如，对于5GHz频段范围内的非授权频谱，欧洲的法规需求包括最小信道占用带宽以及最大功率谱密度的需求，对于OCB的需求，终端使用该信道进行数据传输时，所占用的信道带宽不低于总信道带宽的80％；为了满足OCB占用需求，SL-U可以借鉴NR-U中的梳齿资源块(interlaced resource block，IRB)结构。
一个梳齿资源包括频域离散的N个PRB，频带范围内共计包括M个梳齿资源，第m个梳齿包括的PRB为{m,M+m,2M+m,3M+m,……}。
如图14所示，系统带宽包括20个PRB(一个PRB对应12个子载波)，包括5个梳齿(即M＝5)，每个梳齿包括4个PRB(即N＝4)，一个梳齿中相邻两个PRB的频域间隔相同，即相距5个PRB，图中方框内的数字表示梳齿索引。需要说明的是，一个梳齿中包括的PRB又可称为IRB，梳齿又可称为IRB。
除了IRB结构外，SL-U中还可能引入资源块集合(resource block set，RB set)的概念。
在一些实现方式中，可以将载波上的频域资源分为若干资源块集合，并且在资源块集合之间配置保护频带。例如，一个RB set对应20MHz的频域宽度。通信设备在非授权频谱上需要进行先听后说(Listen before talk，LBT)，LBT成功后才能发送数据。通常，进行LBT的粒度可以为一个RB set，因此，一个RB set又可以称为一个LBT子带。即如果通信设备在某一个RB set上发送数据，需要在对应的RB set上进行LBT，LBT成功后进行传输。
一个RB set包括多个IRB，为了简化，在图15中，一个资源块实际对应图14中的一个IRB。一般情况下，为通信设备配置的BWP包括整数个RB Set。
图15是本申请实施例适用的非授权频谱上配置的资源池的示例。在SL-U系统，可以通过预配置信息或网络配置信息在非授权频谱或共享频谱上配置资源池用于侧行传输。
在一些实现方式中，该资源池包括M1个资源块集合(resource block set，RB set)，其中，一个资源块集合可以包括M2个资源块(resource block，RB)，M1和M2是正整数。
在一些实现方式中，一个RB集合可以对应非授权频谱(或共享频谱)中的一个信道(channel)。例如，一个RB集合可以为非授权频谱(或共享频谱)中的一个信道。因此，RB集合可以又可以称为“信道”。
假设非授权频谱上的信道对应的带宽为20MHz，相应地，RB集合对应的带宽可以为20MHz。
假设非授权频谱上的信道的带宽为20MHz，对应于M3个RB，该M3个RB是一个信道所包括的所有的RB，或者是一个信道中可用于数据传输的所有的RB，若M3＝100(对应于15kHz子载波间隔)，相应地，RB集合可以包括100个RB，即M2＝100。
在另一些实现方式中，一个RB集合可以对应进行LBT的最小频域粒度，或者说，一个RB集合可以对应LBT子带。例如，一个RB集合可以为一个LBT子带，因此，RB集合又可称为LBT子带。
假设在非授权频谱上进行LBT的最小频域粒度为20MHz，那么一个RB集合可以包括20MHz对应的RB数。
假设一个RB集合包括100个RB(对应于15kHz子载波间隔)，即M2＝100个RB，相应地，LBT的最小频域粒度为一个RB集合，即100个RB。
在一些实现方式中，该资源池的频域起始位置可以基于上述M1个RB集合中的第一RB集合的频域起始位置确定。例如，资源池的频域起始位置可以与第一RB集合的频域起始位置相同。其中，上述第一RB集合是上述M1个RB集合中频域位置最低的RB集合(或者说，第一个RB集合)。
在一些实现方式中，该资源池的频域结束位置可以基于上述M1个RB集合中的第二RB集合的频域结束位置确定。例如，资源池的频域结束位置可以与第二RB集合的频域结束位置相同。其中，上述第二RB集合是M1个RB集合中频域位置最高的RB集合(或者说，最后一个RB集合)。
例如，上述资源池包括3个RB集合(即M1＝3)，对应的RB集合的索引分别为RB集合0、RB集合1和RB集合2，其中，RB集合0的频域位置最低，RB集合2的频域位置最高，因此，该资源池的频域起始位置可以与RB集合0的频域起始位置相同，该资源池的频域结束位置可以与RB集合2的频域结束位置相同。
在一些场景中，该资源池包括的M1个RB集合中相邻的两个RB集合之间可以设置有保护频带 (guard band，GB)，又称“保护频段”，其中，保护频带可以用于分隔RB集合。
在一些实现方式中，可以根据预配置信息或网络配置信息确定保护频带的频域起始位置和频域大小。相应地，终端可以获取预配置信息或网络配置信息，该预配置信息或网络配置信息用于配置保护频带。
为了便于理解，下文结合图15介绍本申请实施例适用的非授权频谱上资源池配置方式。参见图15，在侧行带宽分段(bandwidth part，BWP)内配置了3个保护频带，分别对应保护频带0、保护频带1和保护频带2，这3个保护频带分隔了4个RB集合，根据每个保护频带的频域起始位置(即图中所示的保护频带的起点)和保护频带的频域大小(即图中所示的保护频带的长度)，可以确定每个RB集合的频域起始位置和频域结束位置。
相应地，侧行BWP可以包括上述4个RB集合，并且在该侧行BWP内配置了一个资源池(下文简称为“资源池”)，该资源池可以包括3个RB集合，即RB集合0至RB集合2，因此，该资源池的频域起始位置(即图中所示的资源池的起点)可以与RB集合0的频域起始位置相同，资源池的频域结束位置(即图中所示的资源池的终点)可以与RB集合2的频域结束位置相同。
在一些场景中，一个RB集合中包括一个或多个子信道。例如，在图15中的每个RB集合中都可以包括一个或多个子信道。
在一些实现方式中，一个PSCCH可以在一个或多个RB集合中发送。在另一些实现方式中，一个PSSCH可以在一个或多个RB集合中发送，并且该PSSCH占据该一个或多个RB集合中的一个或多个子信道。
在本申请实施例中，一个RB可以包括一个时隙内的12个连续的子载波，一个PRB可以包括一个OFDM符号内的12个连续子载波。需要说明的是，为了便于理解，下文以RB为例进行介绍。在本申请实施例中，RB可以与PRB进行互换，也即是说，下文涉及RB的方案中，RB可以替换为PRB。
另外，本申请实施例的方案也可以适用于交织资源块，又称为“交织物理资源块(interlaced PRB，IRB)”，也即是说，下文涉及RB的方案中，RB也可以替换为交织资源块。应理解，由于上文交织PRB和梳齿资源块的缩写都可以为“IRB”，因此，为了便于区分，在本申请实施例中“IRB”可以表示为梳齿资源块，交织资源块用“交织PRB”表示。
连续多时隙传输(multiple consecutive slot transmission，MCSt)
根据上文所述，在非授权频谱上，通信设备需要先进行LBT，LBT成功后才可以接入信道。当通信设备LBT成功接入信道后，在对应的COT内，通信设备可以连续传输也可以非连续传输。一方面，为了能够更充分地利用LBT成功后发起的COT，在SL-U中可能引入MCSt传输的概念，即通信设备可以连续地在多个时隙上进行传输，以提升COT的利用率。另一方面，采用MCSt传输可以连续地使用/占用信道，有利于与异系统(例如，Wi-Fi系统)竞争信道，避免异系统通过LBT接入信道。例如，当SL-U终端采用MCSt传输时，在COT内由于信道可以被连续占用，此时，Wi-Fi用户无法通过LBT接入信道。
需要说明的是，在本申请实施例中，MCSt可以理解为占用多个时隙中的全部时域资源进行连续传输，当然，MCSt还可以理解为占用多个时隙中某个或某些时隙的部分时域资源进行连续传输，在这种情况下，MCSt占用的时域资源之间可能会有时间间隔，但由于MCSt占用了多个时隙中的每个时隙，因此还是可以视为一种连续传输。
如上文介绍，基于MCSt的优势，目前讨论到要在SL-U系统中引入MCSt模式，但是，SL-U系统如何支持MCSt传输是亟待解决的问题。
因此，本申请实施例提供了一种用于侧行通信的方法，以规定在SL-U系统中进行MCSt所占用的MCSt资源(下文又称“第一MCSt资源”)，有助于实现在SL-U系统进行MCSt。下文结合图16介绍本申请实施例用于侧行通信的方法。
图16是本申请实施例的用于侧行通信的方法的示意性流程图。图16所示的方法包括步骤S1610。
在步骤S1610中，终端设备确定第一多时隙连续传输MCSt资源。
在时域上，第一MCSt资源可以占用连续的M个时隙，M为大于1的正整数。
需要说明的是，第一MCSt资源占用连续的M个时隙，可以理解为第一MCSt资源占用M个时隙中的全部时域资源进行连续传输。当然，在本申请实施例中，第一MCSt资源还可以占用M个时隙中的部分时域资源进行连续传输，在这种情况下，第一MCSt资源占用的时域资源之间可能会有时间间隔，但由于第一MCSt资源占用了多个时隙中的每个时隙，因此还是可以视为一种连续传输。
另外，在一些实现方式中，上述时间间隔可以短于异系统抢占资源所需的最短的时间，如此，也可以避免异系统抢占传输资源。其中，上述时间间隔的时长例如可以小于或等于16微秒。
在频域上，第一MCSt资源可以以任意的频域资源粒度在侧行资源池(下文简称为“资源池”)内进行映射，其中频域资源粒度可以包括：RB、IRB、子信道、以及RB集合中的一种。也即是说，第一MCSt资源在频域上满足以下一种：占用资源池中的一个或多个资源块或交织PRB；占用资源池中的一个或多个资源块集合；以及占用资源池中的一个或多个子信道。
若第一MCSt资源在频域上占用资源池中的一个或多个资源块或交织PRB，在一些实现方式中，第一MCSt资源在每个时域单元(例如，时隙或符号)内占用的RB(或交织PRB)的个数可以相同也可以不同。在另一些实现方式中，第一MCSt资源在每个时域单元内占用的RB(或交织PRB)的位置可以相同或不同。
在本申请实施例中，第一MCSt资源以资源块或交织PRB为粒度进行映射，有助于提高映射的灵活性。在一些场景中，当终端设备的可用COT(例如其他终端设备或网络设备共享的COT)中对应的频域资源可能不足RB集合，此时，第一MCSt资源可以以资源块或交织PRB为粒度映射，有助于使得第一MCSt资源位于终端设备的COT内。
若第一MCSt资源在频域上占用资源池中的一个或多个RB集合，在一些实现方式中，第一MCSt资源在每个时域单元(例如，时隙或符号)内占用的RB集合的个数可以相同也可以不同。在另一些实现方式中，第一MCSt资源在每个时域单元(例如，时隙或符号)内占用的RB集合的位置可以相同或不同。
如前文介绍，终端设备通常以RB集合为粒度进行LBT，若终端设备进行LBT的资源不足一个RB集合时，通常会发生LBT失败。因此，第一MCSt资源以RB或子信道为粒度映射时，其他终端设备可能仍然会在被第一MCSt资源占用的RB集合内的其他资源上发起LBT，但是由于RB集合中的部分频域资源被第一MCSt资源占用，导致LBT失败。若第一MCSt资源以RB集合为粒度映射时，由于RB集合内的资源被第一MCSt资源占满，其他终端设备便不会在该RB集合内发起LBT。因此，第一MCSt资源以RB集合为粒度映射，有助于避免其他终端设备发起无效的LBT。
若第一MCSt资源在频域上占用资源池中的一个或多个子信道，在一些实现方式中，第一MCSt资源在每个时域单元(例如，时隙或符号)内占用的子信道的个数可以相同也可以不同。在另一些实现方式中，第一MCSt资源在每个时域单元(例如，时隙或符号)内占用的子信道的位置可以相同或不同。
继续参见图9或图10所示，在NR-U系统中，每个时隙的最后一个符号可以用于收发转换。在SL-U系统中，每个时隙的最后一个符号还可以用于终端设备进行LBT信道侦听，因此，在一些实现方式中，为了给终端设备(该终端设备或其他终端设备)留出进行LBT信道侦听的资源，第一MCSt资源在时域上可以不占用M个时隙中的一个或多个时隙的最后一个符号。当然，在本申请实施例中，第一MCSt资源在时域上可以占用M个时隙中的一个或多个时隙的最后一个符号。
为了保证终端设备可以进行MCSt，第一MCSt资源在时域上可以占用在M个时隙中第1个时隙至第M-1个时隙中的最后一个符号，第一MCSt资源不占用第M个时隙中的最后一个符号，该符号可以用于进行LBT信道侦听。
在本申请实施例中，第一MCSt资源可以占用第1个时隙至第M-1时隙的最后一个符号，有助于帮助终端设备进行MCSt提供合适的资源。另外，本申请实施例中，还可以在第M个时隙中的最后一个符号中为终端设备进行LBT信道侦听预留符号，以提高第一MCSt资源占用的时域资源的合理性。
在一些实现方式中，可以基于第一MCSt资源在最后一个符号占用的频域资源，来确定第一MCSt资源占用或不占用最后一个符号。或者说，第一MCSt资源占用或不占用最后一个符号是基于第一MCSt资源在最后一个符号占用的频域资源确定的。
例如，可以基于第一MCSt资源在最后一个符号占用的频域资源的尺寸，来确定第一MCSt资源占用或不占用最后一个符号。
如上文介绍，在SL-U系统中，终端设备通常以RB集合为频域粒度进行LBT，因此，如果在最后一个符号上预留用于LBT的频域资源小于RB集合，则终端设备通常无法LBT成功，此时，可以不考虑在最后一个符号上进行LBT信道侦听，相应地，为了提高资源的利用率，第一MCSt资源可以占用最后一个符号。换句话说，若第一MCSt资源在最后一个符号占用的频域资源为资源块集合，则第一MCSt资源占用最后一个符号。
相反地，如果在最后一个符号上预留用于LBT的频域资源大于或等于RB集合，则终端设备可以在该符号的RB集合上进行LBT信道侦听，此时，第一MCSt资源可以不占用最后一个符号，或，第一MCSt资源占用最后一个符号中的部分时域资源。相应地，若第一MCSt资源占用最后一个符号中的部分时域资源，最后一个符号中未被第一MCSt资源占用的时间可以用于LBT。换句话说，若第一MCSt资源在最后一个符号占用的频域资源为资源块集合中的部分频域资源，则第一MCSt资源不占用最后一个符号，或，第一MCSt资源占用最后一个符号中的部分时域资源。
例如，假设LBT需要16微秒，且第一MCSt资源占用最后一个符号中的部分时域资源，则为了预留LBT所需的资源，最后一个符号中未被第一MCSt占用的资源对应的时间长度可以为16微秒。
继续参见图10所示，在一些场景中，一个时隙还可以包括PSFCH资源，因此，本申请实施例还讨论了第一MCSt资源与PSFCH资源之间的关系。
为了便于理解，下文先结合图17和图18介绍本申请实施例提供的两种PSFCH资源配置方式。然后再结合图17和图18介绍本申请实施例中第一MCSt资源与PSFCH资源之间的关系。
在PSFCH资源配置方式1中，资源池包含的所有RB集合内均存在PSFCH资源，或者说，PSFCH资源在频域上占用资源池中的全部RB集合。
参见图17所示，假设资源池在时域上包括时隙1～时隙4，在频域上包括RB集合1以及RB集合2，PSFCH资源所在的时域为时隙2以及时隙4中的符号T PSFCH，基于PSFCH资源配置方式1可知，PSFCH资源所在的时域内的资源为PSFCH资源所在的符号T PSFCH内的资源，也即是说，PSFCH资源所在的时域内的资源在时域上包括符号T PSFCH，在频域上包括RB集合1和RB集合2。此时，PSFCH资源所在的时域内的资源中的全部资源用于传输PSFCH。
另外，基于PSFCH资源配置方式1可知，PSFCH资源所在的频域内的资源为资源池中的RB集合1与RB集合2，即资源池中的全部RB集合。
在PSFCH资源配置方式2中，资源池包含的部分RB集合内均存在PSFCH资源，或者说，PSFCH资源在频域上占用资源池中的部分RB集合。
参见图18所示，假设资源池在时域上包括时隙1～时隙4，在频域上包括RB集合1～RB集合4，PSFCH资源占用时隙2以及时隙4中的符号T PSFCH，PSFCH资源所在的频域为RB集合1和RB集合2，也即是说，RB集合3和RB集合4中没有用于传输PSFCH的频域资源。基于PSFCH资源配置方式2可知，PSFCH资源所在的时域内的资源为PSFCH资源所在的符号T PSFCH内的资源，也即是说，PSFCH资源所在的时域内的资源在时域上包括符号T PSFCH，在频域上包括RB集合1至RB集合4。此时，PSFCH资源所在的时域内的资源中的部分资源用于传输PSFCH。
另外，基于PSFCH资源配置方式2可知，PSFCH资源所在的频域内的资源为资源池中的RB集合1与RB集合2，即资源池中的部分RB集合。
下文介绍第一MCSt资源与PSFCH资源之间的关系。在一些实现方式中，第一MCSt资源可以满足以下中的一种或多种：包括PSFCH资源所在的时域内的资源；包括PSFCH资源所在的频域内的资源；包括PSFCH资源；不包括PSFCH资源所在的时域内的资源；不包括PSFCH资源所在的频域内的资源；以及不包括PSFCH资源。
下文结合图17和图18，介绍第一MCSt资源以RB集合为粒度映射时，第一MCSt资源与PSFCH资源之间的关系，以及第一MCSt资源以RB(或交织PRB)为粒度映射时，第一MCSt资源与PSFCH资源之间的关系。
以第一MCSt资源不包括PSFCH资源所在的时域内的资源为例，参见图17所示，第一MCSt资源在时域上不包括符号T PSFCH，在频域上不包括RB集合1和RB集合2。参见图18所示，第一MCSt资源在时域上不包括符号T PSFCH，在频域上不包括RB集合1～RB集合4。
以第一MCSt资源包括PSFCH资源所在的时域内的资源为例，参见图17所示，第一MCSt资源在时域上包括符号T PSFCH，在频域上包括RB集合1和RB集合2。参见图18所示，第一MCSt资源在时域上包括符号T PSFCH，在频域上包括RB集合1～RB集合4。
以第一MCSt资源不包括PSFCH资源所在的频域内的资源为例，参见图17所示，第一MCSt资源可以不包括RB集合1和RB集合2内的资源。参见图18所示，第一MCSt资源可以不包括RB集合1和RB集合2内的资源，相应地，第一MCSt资源可以包括RB集合3～RB集合4。
以第一MCSt资源包括PSFCH资源所在的频域内的资源为例，参见图17所示，第一MCSt资源可以包括RB集合1和RB集合2内的资源。参见图18所示，第一MCSt资源可以包括RB集合1～RB集合4内的资源。
以第一MCSt资源包括PSFCH资源为例，参见图17所示，第一MCSt资源包括资源符号T PSFCH内的RB集合1和RB集合2。参见图18所示，第一MCSt资源包括资源符号T PSFCH内的RB集合1和RB集合2。
以第一MCSt资源不包括PSFCH资源为例，参见图17所示，第一MCSt资源不包括资源符号T PSFCH内的RB集合1和RB集合2。参见图18所示，第一MCSt资源不包括资源符号T PSFCH内的RB集合1和RB集合2。
继续参见图10，若某一时隙中包括PSFCH资源，相应地，该时隙上还会设置有用于PSFCH接收的AGC符号，以及用于终端设备接收PSFCH作收发转换的符号GP。在一些方式中，若第一MCSt资 源包括PSFCH资源所在的时域内的资源，相应地，可能不需要在PSFCH资源接收PSFCH，那么，GP符号以及AGC符号也不需要，因此，为了提高资源的利用率，GP符号和/或AGC符号也可以用于MCSt，也即是说，第一MCSt资源还包括用于PSFCH接收的AGC符号，和/或，在时域上位于AGC符号之前的GP占用的符号。
在一些实现方式中，第一MCSt资源是否包括PSFCH资源所在的时域内的资源是基于第一条件确定的，其中，第一条件可以基于以下中的一种或多种确定：第一MCSt资源是否包括PSFCH资源所在的频域内的资源；PSFCH资源是否存在反馈信息。
以第一条件包括第一MCSt资源是否包括PSFCH资源所在的频域内的资源为例，在一些实现方式中，若第一MCSt资源不包括PSFCH资源所在的频域内的资源，则第一MCSt资源包括PSFCH资源所在的时域内的资源。
为了便于理解，下文以图18所示的PSFCH配置方式为例进行介绍，假设第一MCSt资源在频域上占用RB集合3以及RB集合4，此时，第一MCSt资源不包括PSFCH资源所在的频域内的资源，相应地，第一MCSt资源可以包括PSFCH资源所在的时域内的资源，即符号T PSFCH内的资源。
在另一些实现方式中，若第一MCSt资源包括PSFCH资源所在的频域内的资源，则第一MCSt资源不包括PSFCH资源所在的时域内的资源。
为了便于理解，下文继续以图18所示的PSFCH配置方式为例进行介绍，假设第一MCSt资源在频域上占用RB集合1以及RB集合2，此时，第一MCSt资源包括PSFCH资源所在的频域内的资源，相应地，第一MCSt资源可以不包括PSFCH资源所在的时域内的资源，即符号T PSFCH内的资源。
以第一条件包括PSFCH资源是否存在反馈信息为例，在一些实现方式中，若PSFCH资源不存在反馈信息，则第一MCSt资源可以包括PSFCH资源所在的时域内的资源。在另一些实现方式中，若PSFCH资源存在反馈信息，则第一MCSt资源不包括PSFCH资源所在的时域内的资源。
需要说明的是，上文的介绍了两种第一条件单独使用时，如何确定第一MCSt资源是否包括PSFCH资源所在的时域内的资源。在本申请实施例中，上述两种第一条件还可以结合使用，来确定第一MCSt资源是否包括PSFCH资源所在的时域内的资源，其确定方式与两种第一条件单独判断时类似，为了简洁，下文不再赘述。
另外，在本申请实施例中，上述第一条件还可以用于确定第一MCSt资源是否包括PSFCH资源，其具体的判断方式与上文介绍类似，为了简洁，下文不再赘述。
如前文介绍，在侧行通信场景中，PSFCH可以周期性传输。在一些实现方式中，M可以小于或等于PSFCH的配置周期，有助于避免第一MCSt资源与PSFCH发生碰撞。继续参见图17，假设PSFCH的配置周期为2个时隙，即每2个时隙内存在一个包含PSFCH资源的符号，因此，分别在时隙2和时隙4内存在一个包含PSFCH资源的符号，此时，M最大为2。当然，在本申请实施例中，M也可以大于PSFCH的配置周期。
在一些实现方式中，若MCSt对连续性要求较高，也即是说，第一MCSt资源占用的M个时隙中不包括PSFCH资源，此时，可以配置M小于或等于PSFCH的配置周期，否则，可能在M个时隙中都无法传输PSFCH。当然，如果不考虑PSFCH传输的问题，在此种场景下，也可以配置M大于PSFCH的配置周期。
在另一些实现方式中，若MCSt对连续性要求较低，也即是说，第一MCSt资源占用的M个时隙中包括PSFCH资源，此时，可以配置M大于PSFCH的配置周期。当然，在此种场景下，也可以配置M小于或等于PSFCH的配置周期。
在一些实现方式中，M的配置还可以与第一MCSt资源占用的频域资源关联，例如，若第一MCSt资源在频域上占用资源池中的一个或多个资源块集合，则M小于或等于PSFCH资源的配置周期。又例如，若第一MCSt资源在频域上占用资源池中的一个或多个资源块或交织PRB，则M大于PSFCH资源的配置周期。
为了便于理解，下文分别结合实施例1和实施例2介绍本申请实施例中的第一MCSt资源。其中，在实施例1中，第一MCSt资源为时域上连续的M个时隙内的一个或多个RB集合。在实施例2中，第一MCSt资源为时域上连续的M个时隙内的一个或多个RB。
实施例1
假设第一MCSt资源占用连续的M个时隙，并且占用其中第1个时隙到第M-1个时隙中的最后一个符号的全部资源。也即是说，第M个时隙的最后一个符号可以用于进行LBT信道监听。
如果资源池内配置有PSFCH资源，PSFCH资源的配置周期为2，若配置M的值不大于PSFCH资源的配置周期，则M的值可以为2，此种情况下，第一MCSt资源与PSFCH资源之间的关系可以参见下文介绍的4种实现方式。
实现方式1，在M个连续时隙中不包括PSFCH资源所在符号内的资源。
继续参见图17所示，第一MCSt资源不包括时隙2以及时隙4中符号T PSFCH内的RB集合，即，符号T PSFCH内的RB集合1和RB集合2。
实现方式2，第一MCSt资源中不包括PSFCH资源。
在一些实现方式中，如果第一MCSt资源在频域上包括PSFCH资源的RB集合，则第一MCSt资源不包括PSFCH资源的符号。参见图18所示，如果第一MCSt资源包括RB集合1或RB集合2，则第一MCSt资源不包括PSFCH资源所在的符号T PSFCH内的RB集合1以及RB集合2。
在一些实现方式中，如果第一MCSt资源在频域上不包括PSFCH资源所在的RB集合，则第一MCSt资源可以包括PSFCH资源所在的符号T PSFCH。参见图18所示，如果第一MCSt资源包括RB集合3以及RB集合4，但第一MCSt资源不包RB集合1和RB集合2，则第一MCSt资源可以包括PSFCH资源所在符号T PSFCH。此时，第一MCSt资源还可以包括用于PSFCH接收的AGC符号，以及位于AGC符号之前的GP符号。
若第一MCSt资源可以包括PSFCH资源所在符号T PSFCH，也就意味着不传输PSFCH来指示对应的数据是否被正确接收，此时，为了提高数据传输的可靠性，可以在第一MCSt资源内进行同一个数据(例如，TB)的不同重传。当然，在上述情况下，也可以在第一MCSt资源内传输不同的数据。
在一些实现方式中，如果第一MCSt资源在频域上既包括PSFCH资源所在的RB集合，又包括PSFCH资源不在的RB集合，则在PSFCH资源所在的RB集合上，第一MCSt资源可以不包括存在PSFCH资源的符号T PSFCH，在不包括PSFCH资源的RB集合上，第一MCSt资源可以包括PSFCH资源所在的符号T PSFCH。
继续参见图18，RB集合1以及RB集合2为包括PSFCH资源的RB集合，在RB集合1以及RB集合2内，第一MCSt资源可以不包括PSFCH资源所在的符号T PSFCH。RB集合3以及RB集合4为不包括PSFCH资源的RB集合，在RB集合3以及RB集合4内，第一MCSt资源可以包括PSFCH资源所在的符号T PSFCH。
实现方式3：第一MCSt资源包括PSFCH资源。
如果第1个时隙到第M-1个时隙中的某个时隙上存在PSFCH资源，则第一MCSt资源还可以包括用于PSFCH接收的AGC符号以及位于AGC符号之前的GP。
在一些实现方式中，为了保证最小信道占用带宽，会在某一符号内规定多个公共RB，这多个公共RB(例如，公共交织RB或公共RB)所在的带宽满足最小信道占用带宽。相应地，在原本用于传输PSFCH的符号T PSFCH上，终端设备可以占用符号T PSFCH内的多个公共RB。
第一MCSt资源包括PSFCH资源，也就意味着不传输PSFCH来指示对应的数据是否被正确接收，此时，为了提高数据传输的可靠性，可以在第一MCSt资源内进行同一个数据(例如，TB)的不同重传。当然，在上述情况下，也可以在第一MCSt资源内传输不同的数据。
实现方式4：第一MCSt资源可以包括PSFCH资源所在的RB集合。
如果第1个时隙到第M-1个时隙中的某个时隙上存在PSFCH资源，在一些实现方式中，如果终端设备的目标接收终端不在PSFCH资源上向终端设备反馈HARQ信息，则第一MCSt资源可以包括用于PSFCH接收的AGC符号以及位于AGC符号之前的GP。
在一些实现方式中，在原本用于传输PSFCH的符号T PSFCH上，终端设备可以占用符号T PSFCH内的公共RB。
如果第1个时隙到第M-1个时隙中的某个时隙上存在PSFCH资源，在另一些实现方式中，如果目标接收终端在PSFCH资源上向终端设备反馈HARQ信息，则第一MCSt资源不包括PSFCH资源以及用于PSFCH接收的AGC符号。
实施例2
假设第一MCSt资源占用连续的M个时隙，相应地，第一MCSt资源是否占用第1个时隙到第M-1个时隙中的最后一个符号，可以分为以下两种情况：情况1以及情况2。
在情况1中，假设第一MCSt资源占用第1个时隙到第M-1个时隙中的最后一个符号上的RB集合，则第一MCSt资源可以包括上述各个时隙内的最后一个符号。
参见图19所示，RB集合1内的全部资源属于第一MCSt资源，RB集合2内的部分资源属于第一MCSt资源。若第1个时隙到第M-1个时隙中的最后一个符号上的RB集合都如RB集合1，则第一MCSt资源可以占用第1个时隙到第M-1个时隙中的最后一个符号。
在情况2中，假设第一MCSt资源占用第1个时隙到第M-1个时隙中的最后一个符号上RB集合内的部分资源，则第一MCSt资源可以包括上述各个时隙内的最后一个符号中的部分资源，或者，第一MCSt资源可以不包括上述各个时隙内的最后一个符号。
参见图19所示，若第1个时隙到第M-1个时隙中的最后一个符号上的RB集合都如RB集合2，则第一MCSt资源可以占用第1个时隙到第M-1个时隙中的最后一个符号内的部分资源。
参见图19所示，若第1个时隙到第M-1个时隙中的最后一个符号上的RB集合都如RB集合2，则第一MCSt资源可以不占用第1个时隙到第M-1个时隙中的最后一个符号。
如果资源池内配置有PSFCH资源，PSFCH资源的配置周期为2，并且配置M的值可以大于PSFCH资源的配置周期，此种情况下，第一MCSt资源与PSFCH资源之间的关系可以参见下文介绍的4种实现方式。
需要说明的是，M的值可以大于PSFCH资源的配置周期，可以理解为第一MCSt资源中的某个或某些个时隙上可以存在PSFCH资源。在这种情况下，第一MCSt资源不包括用于PSFCH接收的AGC符号，以及位于AGC符号之前的GP符号。
实现方式1，第一MCSt资源不包括PSFCH资源所在符号内的资源。
继续参见图17所示，第一MCSt资源不包括时隙2以及时隙4中符号T PSFCH内的RB集合，即，符号T PSFCH内的RB集合1和RB集合2。
实现方式2，第一MCSt资源中不包括PSFCH资源。
在一些实现方式中，如果第一MCSt资源在频域上包括PSFCH资源的RB集合，则第一MCSt资源不包括PSFCH资源的符号。参见图18所示，如果第一MCSt资源包括RB集合1或RB集合2，则第一MCSt资源不包括PSFCH资源所在的符号T PSFCH。
在另一些实现方式中，如果第一MCSt资源在频域上不包括PSFCH资源的RB集合，则第一MCSt资源包括PSFCH资源的符号。参见图18所示，如果第一MCSt资源包括RB集合3或RB集合4，则第一MCSt资源可以包括PSFCH资源所在的符号T PSFCH。
实现方式3：第一MCSt资源包括PSFCH资源。
继续参见图18所示，PSFCH资源为符号T PSFCH内的RB集合1和RB集合2。
在一些实现方式中，第一MCSt资源包括PSFCH资源，也就意味着不传输PSFCH来指示对应的数据是否被正确接收，此时，为了提高数据传输的可靠性，可以在第一MCSt资源内进行同一个数据(例如，TB)的不同重传。当然，在上述情况下，也可以在第一MCSt资源内传输不同的数据。
在一些实现方式中，如果第一MCSt资源中的第1个时隙到第M-1个时隙中的某个时隙上存在PSFCH资源，第一MCSt资源可以包括PSFCH符号以及用于PSFCH接收的AGC符号上发送。其中，第一MCSt资源与PSFCH符号上的RB集合之间的关系可以分为以下两种情况：
情况1，如果PSFCH符号上的RB集合内存在PSFCH资源，则第一MCSt资源包括PSFCH符号内的公共RB(例如，公共PRB或公共交织PRB)，以保证最小信道占用带宽，
需要说明的是，在用于PSFCH接收的AGC符号上，终端设备可以复制在PSFCH符号发送的信号。
情况2，如果PSFCH符号上的RB集合内不存在PSFCH资源，则第一MCSt资源可以包括全部PSFCH符号、用于PSFCH接收的AGC符号、以及位于AGC符号之前的GP符号中的RB集合。
需要说明的是，上文介绍的以RB为粒度映射第一MCSt资源的方案，同样适用于以子信道为粒度映射第一MCSt资源，子信道可以包括一个或多个频域上连续的RB。相应地，可以将实施例2中的RB替换为子信道，为了简洁，下文不再具体赘述。
还需要说明的是，上文介绍的以RB为粒度映射第一MCSt资源的方案，同样适用于以交织PRB为粒度映射第一MCSt资源。相应地，可以将实施例2中的RB替换为交织PRB，为了简洁，下文不再具体赘述。
如前文介绍可知，侧行系统中传统的资源选择是以时隙为粒度进行的，这种以时隙为粒度的资源选择方式可能无法匹配MCSt。因此，SL-U系统如何在资源选择过程中保证MCSt是亟待解决的问题。
因此，本申请实施例还提供了一种用于侧行通信的方法，在该方法中，终端设备可以基于与MCSt资源关联的第一参数，在侧行资源池中进行资源选择，以保证MCSt。下文结合图20介绍本申请另一实施例的用于侧行通信的方法。
图20是本申请另一实施例的用于侧行通信的方法的示意图，图20所示的方法包括步骤S2010。
在步骤S2010中，终端设备基于第一参数在侧行资源池中进行资源选择。
在一些实现方式中，第一参数可以包括第二参数，其中，第二参数可以对应MCSt资源的时域资源粒度。时域资源粒度例如可以是时隙，时域资源粒度例如还可以是时域资源组(或者称“时隙组”)，该时域资源组可以包括一个或多个时隙。
在另一些实现方式中，第二参数可以用于指示MCSt资源在时域上占用侧行资源池中连续的M个时隙，其中，M为大于1的正整数。
在一些实现方式中，上述第一参数包括第三参数，其中，第三参数对应MCSt资源的频域资源粒度，其中，频域资源粒度可以包括RB集合、交织PRB、RB、子信道中的一种或多种。
在另一些实现方式中，第三参数可以用于指示MCSt资源在频域上占用侧行资源池中的一个或多个资源块或交织PRB；或，第三参数用于指示MCSt资源在频域上占用资源池中的一个或多个资源块集合；或第三参数用于指示MCSt资源在频域上占用资源池中的一个或多个子信道。
在一些实现方式中，第二参数与第三参数可以对应一种时频域资源粒度，该时频域资源粒度可以用于在侧行资源池中进行资源排除和/或资源选择。
为了便于理解，下文介绍本申请实施例的资源选择过程。假设第二参数指示MCSt资源的时域资源粒度为M个时隙，第三参数指示MCSt资源的频域资源粒度为N个RB，其中，N为不小于1的正整数，相应地，第二参数与第三参数组成的时频域资源粒度可以为在M个时隙中的N个RB。
终端设备的MAC层可以向终端设备的物理层指示第二参数以及第三参数，相应地，终端设备的物理层以第二参数以及第三参数为资源粒度，执行资源排除和资源上报。例如，可以将前文介绍的基于资源侦听的资源选择过程中的R(x,y)定义为从时隙X开始的连续M个时隙内以y开始的N个RB组成的资源，即{M,N}。
相应地，物理层在执行完资源排除后，将候选资源集合上报MAC层，MAC层可以从候选资源集合中选择由M’个连续时隙组成的MCSt资源，其中M’的值可以大于或等于该候选资源集合所对应的M的值。
需要说明的是，若物理层基于多种资源粒度进行资源排除，那么，针对每种资源粒度都可以得到一个候选资源集合，相应地，MAC层可以从多个候选资源集合中选择资源。
在另一些实现方式中，第一参数可以包括多组参数组合，每个参数组合包括一个第二参数和一个第三参数，多组数组合对应多种时频域资源粒度，多种时频域资源粒度用于在侧行资源池中进行资源排除和/或资源选择。当然，在本申请实施例中，也可以以某一种第二参数与第三参数组合的时频域资源粒度(又称“资源粒度”)，来在侧行资源池中进行资源排除和/或资源选择。
需要说明的是，上述多组参数组合中的部分参数可以相同，当然，在本申请实施例中，多组参数中包括的参数也可以完全不同。
例如，假设M可以对应的取值为M1和M2，N可以对应的取值为N1和N2，相应地，多种资源粒度可以表示为{M1，N1}、{M2，N2}，物理层可以分别以{M1,N1}和{M2，N2}为资源粒度进行资源排除，得到候选资源集合S1和候选资源集合S2，并向MAC层上报候选资源集合S1和候选资源集合S2。其中候选资源集合S1对应资源粒度{M1,N1}，候选资源集合S2对应资源粒度{M2，N2}。
最后，MAC层可以从候选资源集合S1选择MCSt资源，MCSt资源可以包括M3个连续时隙，其中，M3可以大于等于M1。或者，MAC层可以从候选资源集合S2选择MCSt资源，MCSt资源可以包括M3个连续时隙，其中，M3可以大于等于M2.
需要说明的是，在本申请实施例中，上述第二参数和/或第三参数可以是物理层指示给MAC层的。当然，上述第二参数和/或第三参数还可以是物理层确定的。在一些实现方式中，MAC层可以向物理层指示的第二参数，相应地，物理层可以基于第二参数以及第二参数与第三参数的对应关系，确定与第二参数对应的第三参数。
上述第二参数与第三参数的对应关系可以是协议预定义的，也可以是网络设备配置的，当然，也可以是预配置的，本申请实施例对此不限定。
在一些实现方式中，第四参数为侧行资源池的资源选择窗中第一类资源的总数，第一类资源以M个连续时隙内的N个资源块为时频域资源粒度，其中，M为大于1的正整数，N为大于或等于1的正整数。
需要说明的是，上述第四参数的用法可以与前文基于资源侦听的资源选择过程中涉及的参数“Mtotal”类似，也即是说，可以以第一类资源的时频资源粒度，计算资源排除后的剩余的资源数量是否满足比例x％。
在本申请实施例中，终端设备基于第四参数确定候选资源集合，有助于从候选资源集合中选择合适的MCSt资源。
在另一些实现方式中，假设第二参数指示MCSt资源的时域资源粒度为M个时隙，第三参数指示MCSt资源的频域资源粒度为N个RB。此时，可以以单时隙内的N个RB为资源粒度进行资源排除，也即是说，以{1，N}为资源粒度进行资源排除。
相应地，上述情况下，第四参数的定义可以为资源选择窗内以{1，N}为资源粒度的资源数量。此时，第四参数依然表示资源选择窗内单时隙资源的数量，并以单时隙资源为粒度计算剩余资源的数量是否满足比例X。假设剩余资源中包括R个以{M，N}为粒度的资源，则对应的单时隙资源的数量为M*R， 其中，R为大于1的正整数。
在本申请实施例中，以{1，N}为资源粒度进行资源排除，可以实现以单时隙为资源粒度进行资源排除，有助于避免将干扰过高的资源作为候选资源。
需要说明的是，以{1，N}为资源粒度还是以{M，N}为资源粒度进行资源排除，可以基于MAC的指示确定，当然，还可以由终端设备实现自主确定资源粒度。
在一些实现方式中，从侧行资源池中选择的第一候选资源集合中第一类资源的总数是基于第五参数确定的，第五参数用于指示从侧行资源池中选择的候选资源集合中的第一类资源的总数与侧行资源池的资源选择窗中第一类资源的总数的比例阈值，其中，第一类资源以M个连续时隙内的N个资源块为时频域资源粒度，其中，M为大于1的正整数，N为大于或等于1的正整数。
需要说明的是，上述第五参数的用法可以与前文基于资源侦听的资源选择过程中涉及的参数“x％”类似，也即是说，第五参数用于判断以第一类资源的时频资源粒度选择的候选资源总数是否足够生成候选资源集合。
需要说明的是，上文中主要以RB为例进行介绍，在本申请实施例中，RB可以替换为交织PRB，也即是说，上文介绍的方案同样适用于交织PRB的场景，为了简洁，下文不再以IRB为例进行介绍。
上文结合图1至图20，详细描述了本申请的方法实施例，下面结合图20至图22，详细描述本申请的装置实施例。应理解，方法实施例的描述与装置实施例的描述相互对应，因此，未详细描述的部分可以参见前面方法实施例。
图21是本申请实施例的终端设备的示意图，图21所示的终端设备2100包括：处理单元2110。
处理单元2110，用于确定第一多时隙连续传输MCSt资源，所述第一MCSt资源在时域上占用连续的M个时隙，所述M为大于1的正整数，所述第一MCSt资源在频域上满足以下一种：占用侧行资源池中的一个或多个资源块或交织PRB；占用侧行资源池中的一个或多个资源块集合；以及占用侧行资源池中的一个或多个子信道。
在一种可能的实现方式中，所述第一MCSt资源在时域上占用或不占用所述M个时隙中的一个或多个时隙的最后一个符号。
在一种可能的实现方式中，所述第一MCSt资源在时域上占用第1个时隙至第M-1个时隙中的最后一个符号。
在一种可能的实现方式中，所述第一MCSt资源占用或不占用所述最后一个符号是基于所述第一MCSt资源在所述最后一个符号占用的频域资源确定的。
在一种可能的实现方式中，若所述第一MCSt资源在所述最后一个符号占用的频域资源为资源块集合，则所述第一MCSt资源占用所述最后一个符号；或若所述第一MCSt资源在所述最后一个符号占用的频域资源为资源块集合中的部分频域资源，则所述第一MCSt资源不占用所述最后一个符号，或，所述第一MCSt资源占用所述最后一个符号中的部分时域资源。
在一种可能的实现方式中，所述第一MCSt资源满足以下中的一种或多种：包括PSFCH资源所在的时域内的资源；包括PSFCH资源所在的频域内的资源；包括PSFCH资源；不包括PSFCH资源所在的时域内的资源；不包括PSFCH资源所在的频域内的资源；以及不包括PSFCH资源。
在一种可能的实现方式中，若所述第一MCSt资源包括所述PSFCH资源所在的时域内的资源，所述第一MCSt资源还包括用于所述PSFCH接收的AGC符号，和/或，在时域上位于所述AGC符号之前的GP占用的符号。
在一种可能的实现方式中，所述第一MCSt资源是否包括所述PSFCH资源所在的时域内的资源是基于第一条件确定的，其中，所述第一条件基于以下中的一种或多种确定：所述第一MCSt资源是否包括所述PSFCH资源所在的频域内的资源；所述PSFCH资源是否存在反馈信息。
在一种可能的实现方式中，若所述第一MCSt资源在频域上包括所述PSFCH资源所在的频域内的资源，则所述第一MCSt资源在时域上不包括所述PSFCH资源所在的时域内的资源；和/或，若所述第一MCSt资源在频域上不包括所述PSFCH资源所在的频域内的资源，则所述第一MCSt资源在时域上包括所述PSFCH所在的时域内的资源。
在一种可能的实现方式中，所述M小于或等于所述PSFCH的配置周期。
在一种可能的实现方式中，若所述第一MCSt资源在频域上占用所述侧行资源池中的一个或多个资源块集合，则所述M小于或等于所述PSFCH资源的配置周期；若所述第一MCSt资源在频域上占用所述侧行资源池中的一个或多个资源块或交织PRB，则所述M大于所述PSFCH资源的配置周期。
图22是本申请另一实施例的终端设备的示意图。图22所示的终端设备2200包括：处理单元2210。
处理单元2210，用于基于第一参数在侧行资源池中进行资源选择，其中，所述第一参数与多时隙连续传输MCSt资源关联。
在一种可能的实现方式中，所述第一参数包括第二参数，所述第二参数对应MCSt资源的时域资源粒度，和/或，所述第二参数用于指示所述MCSt资源在时域上占用所述侧行资源池中连续的M个时隙，其中，M为大于1的正整数。
在一种可能的实现方式中，所述第一参数包括第三参数，所述第三参数对应MCSt资源的频域资源粒度，和/或，第三参数用于指示以下中的一种：所述MCSt资源在频域上占用所述侧行资源池中的一个或多个资源块或交织PRB；所述MCSt资源在频域上占用资源池中的一个或多个资源块集合；或所述MCSt资源在频域上占用资源池中的一个或多个子信道。
在一种可能的实现方式中，所述第一参数包括多组第二参数和第三参数，所述多组第二参数和第三参数对应多种时频域资源粒度，所述多种时频域资源粒度用于在所述侧行资源池中进行资源排除和/或资源选择。
在一种可能的实现方式中，所述第四参数为所述侧行资源池的资源选择窗中第一类资源的总数，所述第一类资源以M个连续时隙内的N个资源块为时频域资源粒度，其中，M为大于1的正整数，N为大于或等于1的正整数。
在一种可能的实现方式中，从所述侧行资源池中选择的第一候选资源集合中第一类资源的总数是基于第五参数确定的，所述第五参数用于指示从所述侧行资源池中选择的候选资源集合中的第一类资源的总数与所述侧行资源池的资源选择窗中所述第一类资源的总数的比例阈值，其中，所述第一类资源以M个连续时隙内的N个资源块为时频域资源粒度，其中，M为大于1的正整数，N为大于或等于1的正整数。
在可选的实施例中，所述处理单元2110可以为处理器2310。终端设备2100还可以包括收发器2330和存储器2320，具体如图23所示。
在可选的实施例中，所述处理单元2210可以为处理器2310。终端设备2200还可以包括收发器2330和存储器2320，具体如图23所示。
图23是本申请实施例的通信装置的示意性结构图。图23中的虚线表示该单元或模块为可选的。该装置2300可用于实现上述方法实施例中描述的方法。装置2300可以是芯片、终端设备或网络设备。
装置2300可以包括一个或多个处理器2310。该处理器2310可支持装置2300实现前文方法实施例所描述的方法。该处理器2310可以是通用处理器或者专用处理器。例如，该处理器可以为中央处理单元(central processing unit，CPU)。或者，该处理器还可以是其他通用处理器、数字信号处理器(digital signal processor，DSP)、专用集成电路(application specific integrated circuit，ASIC)、现成可编程门阵列(field programmable gate array，FPGA)或者其他可编程逻辑器件、分立门或者晶体管逻辑器件、分立硬件组件等。通用处理器可以是微处理器或者该处理器也可以是任何常规的处理器等。
装置2300还可以包括一个或多个存储器2320。存储器2320上存储有程序，该程序可以被处理器2310执行，使得处理器2310执行前文方法实施例所描述的方法。存储器2320可以独立于处理器2310也可以集成在处理器2310中。
装置2300还可以包括收发器2330。处理器2310可以通过收发器2330与其他设备或芯片进行通信。例如，处理器2310可以通过收发器2330与其他设备或芯片进行数据收发。
本申请实施例还提供一种计算机可读存储介质，用于存储程序。该计算机可读存储介质可应用于本申请实施例提供的终端或网络设备中，并且该程序使得计算机执行本申请各个实施例中的由终端或网络设备执行的方法。
本申请实施例还提供一种计算机程序产品。该计算机程序产品包括程序。该计算机程序产品可应用于本申请实施例提供的终端或网络设备中，并且该程序使得计算机执行本申请各个实施例中的由终端或网络设备执行的方法。
本申请实施例还提供一种计算机程序。该计算机程序可应用于本申请实施例提供的终端或网络设备中，并且该计算机程序使得计算机执行本申请各个实施例中的由终端或网络设备执行的方法。
应理解，本申请中术语“系统”和“网络”可以被可互换使用。另外，本申请使用的术语仅用于对本申请的具体实施例进行解释，而非旨在限定本申请。本申请的说明书和权利要求书及所述附图中的术语“第一”、“第二”、“第三”和“第四”等是用于区别不同对象，而不是用于描述特定顺序。此外，术语“包括”和“具有”以及它们任何变形，意图在于覆盖不排他的包含。
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。
在本申请实施例中，“与A相应的B”表示B与A相关联，根据A可以确定B。但还应理解，根据A确定B并不意味着仅仅根据A确定B，还可以根据A和/或其它信息确定B。
在本申请实施例中，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。
本申请实施例中，“预定义”或“预配置”可以通过在设备(例如，包括终端设备和网络设备)中预先保存相应的代码、表格或其他可用于指示相关信息的方式来实现，本申请对于其具体的实现方式不做限定。比如预定义可以是指协议中定义的。
本申请实施例中，所述“协议”可以指通信领域的标准协议，例如可以包括LTE协议、NR协议以及应用于未来的通信系统中的相关协议，本申请对此不做限定。
本申请实施例中术语“和/或”，仅仅是一种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。另外，本文中字符“/”，一般表示前后关联对象是一种“或”的关系。
在本申请的各种实施例中，上述各过程的序号的大小并不意味着执行顺序的先后，各过程的执行顺序应以其功能和内在逻辑确定，而不应对本申请实施例的实施过程构成任何限定。
在本申请所提供的几个实施例中，应该理解到，所揭露的系统、装置和方法，可以通过其它的方式实现。例如，以上所描述的装置实施例仅仅是示意性的，例如，所述单元的划分，仅仅为一种逻辑功能划分，实际实现时可以有另外的划分方式，例如多个单元或组件可以结合或者可以集成到另一个系统，或一些特征可以忽略，或不执行。另一点，所显示或讨论的相互之间的耦合或直接耦合或通信连接可以是通过一些接口，装置或单元的间接耦合或通信连接，可以是电性，机械或其它的形式。
所述作为分离部件说明的单元可以是或者也可以不是物理上分开的，作为单元显示的部件可以是或者也可以不是物理单元，即可以位于一个地方，或者也可以分布到多个网络单元上。可以根据实际的需要选择其中的部分或者全部单元来实现本实施例方案的目的。
另外，在本申请各个实施例中的各功能单元可以集成在一个处理单元中，也可以是各个单元单独物理存在，也可以两个或两个以上单元集成在一个单元中。
在上述实施例中，可以全部或部分地通过软件、硬件、固件或者其任意组合来实现。当使用软件实现时，可以全部或部分地以计算机程序产品的形式实现。所述计算机程序产品包括一个或多个计算机指令。在计算机上加载和执行所述计算机程序指令时，全部或部分地产生按照本申请实施例所述的流程或功能。所述计算机可以是通用计算机、专用计算机、计算机网络、或者其他可编程装置。所述计算机指令可以存储在计算机可读存储介质中，或者从一个计算机可读存储介质向另一个计算机可读存储介质传输，例如，所述计算机指令可以从一个网站站点、计算机、服务器或数据中心通过有线(例如同轴电缆、光纤、数字用户线(digital subscriber line，DSL))或无线(例如红外、无线、微波等)方式向另一个网站站点、计算机、服务器或数据中心进行传输。所述计算机可读存储介质可以是计算机能够读取的任何可用介质或者是包含一个或多个可用介质集成的服务器、数据中心等数据存储设备。所述可用介质可以是磁性介质，(例如，软盘、硬盘、磁带)、光介质(例如，数字通用光盘(digital video disc，DVD))或者半导体介质(例如，固态硬盘(solid state disk，SSD))等。
以上所述，仅为本申请的具体实施方式，但本申请的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本申请揭露的技术范围内，可轻易想到变化或替换，都应涵盖在本申请的保护范围之内。因此，本申请的保护范围应以所述权利要求的保护范围为准。

Claims (40)

  1. 一种用于侧行通信的方法，其特征在于，包括：
    终端设备确定第一多时隙连续传输MCSt资源，所述第一MCSt资源在时域上占用连续的M个时隙，所述M为大于1的正整数，所述第一MCSt资源在频域上满足以下一种：
    占用侧行资源池中的一个或多个资源块或交织资源块；
    占用侧行资源池中的一个或多个资源块集合；以及
    占用侧行资源池中的一个或多个子信道。
  2. 如权利要求1所述的方法，其特征在于，所述第一MCSt资源在时域上占用或不占用所述M个时隙中的一个或多个时隙的最后一个符号。
  3. 如权利要求2所述的方法，其特征在于，所述第一MCSt资源在时域上占用第1个时隙至第M-1个时隙中的最后一个符号。
  4. 如权利要求2所述的方法，其特征在于，所述第一MCSt资源占用或不占用所述最后一个符号是基于所述第一MCSt资源在所述最后一个符号占用的频域资源确定的。
  5. 如权利要求4所述的方法，其特征在于，若所述第一MCSt资源在所述最后一个符号占用的频域资源为资源块集合，则所述第一MCSt资源占用所述最后一个符号；或
    若所述第一MCSt资源在所述最后一个符号占用的频域资源为资源块集合中的部分频域资源，则所述第一MCSt资源不占用所述最后一个符号，或，所述第一MCSt资源占用所述最后一个符号中的部分时域资源。
  6. 如权利要求1-5中任一项所述的方法，其特征在于，所述第一MCSt资源满足以下中的一种或多种：
    包括PSFCH资源所在的时域内的资源；
    包括PSFCH资源所在的频域内的资源；
    包括PSFCH资源；
    不包括PSFCH资源所在的时域内的资源；
    不包括PSFCH资源所在的频域内的资源；以及
    不包括PSFCH资源。
  7. 如权利要求6所述的方法，其特征在于，若所述第一MCSt资源包括所述PSFCH资源所在的时域内的资源，所述第一MCSt资源还包括用于所述PSFCH接收的AGC符号，和/或，在时域上位于所述AGC符号之前的GP占用的符号。
  8. 如权利要求7所述的方法，其特征在于，所述第一MCSt资源是否包括所述PSFCH资源所在的时域内的资源是基于第一条件确定的，其中，所述第一条件基于以下中的一种或多种确定：所述第一MCSt资源是否包括所述PSFCH资源所在的频域内的资源；所述PSFCH资源是否存在反馈信息。
  9. 如权利要求8所述的方法，其特征在于，若所述第一MCSt资源在频域上包括所述PSFCH资源所在的频域内的资源，则所述第一MCSt资源在时域上不包括所述PSFCH资源所在的时域内的资源；和/或，
    若所述第一MCSt资源在频域上不包括所述PSFCH资源所在的频域内的资源，则所述第一MCSt资源在时域上包括所述PSFCH所在的时域内的资源。
  10. 如权利要求1-9中任一项所述的方法，其特征在于，所述M小于或等于所述PSFCH的配置周期。
  11. 如权利要求10所述的方法，其特征在于，若所述第一MCSt资源在频域上占用所述侧行资源池中的一个或多个资源块集合，则所述M小于或等于所述PSFCH资源的配置周期；若所述第一MCSt资源在频域上占用所述侧行资源池中的一个或多个资源块或交织资源块，则所述M大于所述PSFCH资源的配置周期。
  12. 一种用于侧行通信的方法，其特征在于，包括：
    终端设备基于第一参数在侧行资源池中进行资源选择，其中，所述第一参数与多时隙连续传输MCSt资源关联。
  13. 如权利要求12所述的方法，其特征在于，所述第一参数包括第二参数，所述第二参数对应MCSt资源的时域资源粒度，和/或，所述第二参数用于指示所述MCSt资源在时域上占用所述侧行资源池中连续的M个时隙，其中，M为大于1的正整数。
  14. 如权利要求12或13所述的方法，其特征在于，所述第一参数包括第三参数，所述第三参数对应MCSt资源的频域资源粒度，和/或，第三参数用于指示以下中的一种：
    所述MCSt资源在频域上占用所述侧行资源池中的一个或多个资源块或交织资源块；
    所述MCSt资源在频域上占用资源池中的一个或多个资源块集合；或
    所述MCSt资源在频域上占用资源池中的一个或多个子信道。
  15. 如权利要求12-14中任一项所述的方法，其特征在于，所述第一参数包括多组第二参数和第三参数，所述多组第二参数和第三参数对应多种时频域资源粒度，所述多种时频域资源粒度用于在所述侧行资源池中进行资源排除和/或资源选择。
  16. 如权利要求12-15中任一项所述的方法，其特征在于，所述第四参数为所述侧行资源池的资源选择窗中第一类资源的总数，所述第一类资源以M个连续时隙内的N个资源块为时频域资源粒度，其中，M为大于1的正整数，N为大于或等于1的正整数。
  17. 如权利要求12-16中任一项所述的方法，其特征在于，从所述侧行资源池中选择的第一候选资源集合中第一类资源的总数是基于第五参数确定的，所述第五参数用于指示从所述侧行资源池中选择的候选资源集合中的第一类资源的总数与所述侧行资源池的资源选择窗中所述第一类资源的总数的比例阈值，其中，所述第一类资源以M个连续时隙内的N个资源块为时频域资源粒度，其中，M为大于1的正整数，N为大于或等于1的正整数。
  18. 一种终端设备，其特征在于，包括：
    处理单元，用于确定第一多时隙连续传输MCSt资源，所述第一MCSt资源在时域上占用连续的M个时隙，所述M为大于1的正整数，所述第一MCSt资源在频域上满足以下一种：
    占用侧行资源池中的一个或多个资源块或交织资源块；
    占用侧行资源池中的一个或多个资源块集合；以及
    占用侧行资源池中的一个或多个子信道。
  19. 如权利要求18所述的终端设备，其特征在于，所述第一MCSt资源在时域上占用或不占用所述M个时隙中的一个或多个时隙的最后一个符号。
  20. 如权利要求19所述的终端设备，其特征在于，所述第一MCSt资源在时域上占用第1个时隙至第M-1个时隙中的最后一个符号。
  21. 如权利要求19所述的终端设备，其特征在于，所述第一MCSt资源占用或不占用所述最后一个符号是基于所述第一MCSt资源在所述最后一个符号占用的频域资源确定的。
  22. 如权利要求21所述的终端设备，其特征在于，若所述第一MCSt资源在所述最后一个符号占用的频域资源为资源块集合，则所述第一MCSt资源占用所述最后一个符号；或
    若所述第一MCSt资源在所述最后一个符号占用的频域资源为资源块集合中的部分频域资源，则所述第一MCSt资源不占用所述最后一个符号，或，所述第一MCSt资源占用所述最后一个符号中的部分时域资源。
  23. 如权利要求18-22中任一项所述的终端设备，其特征在于，所述第一MCSt资源满足以下中的一种或多种：
    包括PSFCH资源所在的时域内的资源；
    包括PSFCH资源所在的频域内的资源；
    包括PSFCH资源；
    不包括PSFCH资源所在的时域内的资源；
    不包括PSFCH资源所在的频域内的资源；以及
    不包括PSFCH资源。
  24. 如权利要求23所述的终端设备，其特征在于，若所述第一MCSt资源包括所述PSFCH资源所在的时域内的资源，所述第一MCSt资源还包括用于所述PSFCH接收的AGC符号，和/或，在时域上位于所述AGC符号之前的GP占用的符号。
  25. 如权利要求24所述的终端设备，其特征在于，所述第一MCSt资源是否包括所述PSFCH资源所在的时域内的资源是基于第一条件确定的，其中，所述第一条件基于以下中的一种或多种确定：所述第一MCSt资源是否包括所述PSFCH资源所在的频域内的资源；所述PSFCH资源是否存在反馈信息。
  26. 如权利要求25所述的终端设备，其特征在于，若所述第一MCSt资源在频域上包括所述PSFCH资源所在的频域内的资源，则所述第一MCSt资源在时域上不包括所述PSFCH资源所在的时域内的资源；和/或，
    若所述第一MCSt资源在频域上不包括所述PSFCH资源所在的频域内的资源，则所述第一MCSt资源在时域上包括所述PSFCH所在的时域内的资源。
  27. 如权利要求18-26中任一项所述的终端设备，其特征在于，所述M小于或等于所述PSFCH的配置周期。
  28. 如权利要求27所述的终端设备，其特征在于，若所述第一MCSt资源在频域上占用所述侧行资源池中的一个或多个资源块集合，则所述M小于或等于所述PSFCH资源的配置周期；若所述第一MCSt资源在频域上占用所述侧行资源池中的一个或多个资源块或交织资源块，则所述M大于所述PSFCH资源的配置周期。
  29. 一种终端设备，其特征在于，包括：
    处理单元，用于基于第一参数在侧行资源池中进行资源选择，其中，所述第一参数与多时隙连续传输MCSt资源关联。
  30. 如权利要求29所述的终端设备，其特征在于，所述第一参数包括第二参数，所述第二参数对应MCSt资源的时域资源粒度，和/或，所述第二参数用于指示所述MCSt资源在时域上占用所述侧行资源池中连续的M个时隙，其中，M为大于1的正整数。
  31. 如权利要求29或30所述的终端设备，其特征在于，所述第一参数包括第三参数，所述第三参数对应MCSt资源的频域资源粒度，和/或，第三参数用于指示以下中的一种：
    所述MCSt资源在频域上占用所述侧行资源池中的一个或多个资源块或交织资源块；
    所述MCSt资源在频域上占用资源池中的一个或多个资源块集合；或
    所述MCSt资源在频域上占用资源池中的一个或多个子信道。
  32. 如权利要求29-31中任一项所述的终端设备，其特征在于，所述第一参数包括多组第二参数和第三参数，所述多组第二参数和第三参数对应多种时频域资源粒度，所述多种时频域资源粒度用于在所述侧行资源池中进行资源排除和/或资源选择。
  33. 如权利要求29-32中任一项所述的终端设备，其特征在于，所述第四参数为所述侧行资源池的资源选择窗中第一类资源的总数，所述第一类资源以M个连续时隙内的N个资源块为时频域资源粒度，其中，M为大于1的正整数，N为大于或等于1的正整数。
  34. 如权利要求29-33中任一项所述的终端设备，其特征在于，从所述侧行资源池中选择的第一候选资源集合中第一类资源的总数是基于第五参数确定的，所述第五参数用于指示从所述侧行资源池中选择的候选资源集合中的第一类资源的总数与所述侧行资源池的资源选择窗中所述第一类资源的总数的比例阈值，其中，所述第一类资源以M个连续时隙内的N个资源块为时频域资源粒度，其中，M为大于1的正整数，N为大于或等于1的正整数。
  35. 一种终端设备，其特征在于，包括收发器、存储器和处理器，所述存储器用于存储程序，所述处理器用于调用所述存储器中的程序，并控制所述收发器接收或发送信号，以使所述终端执行如权利要求1-17中任一项所述的方法。
  36. 一种装置，其特征在于，包括处理器，用于从存储器中调用程序，以使所述装置执行如权利要求1-17中任一项所述的方法。
  37. 一种芯片，其特征在于，包括处理器，用于从存储器调用程序，使得安装有所述芯片的设备执行如权利要求1-17中任一项所述的方法。
  38. 一种计算机可读存储介质，其特征在于，其上存储有程序，所述程序使得计算机执行如权利要求1-17中任一项所述的方法。
  39. 一种计算机程序产品，其特征在于，包括程序，所述程序使得计算机执行如权利要求1-17中任一项所述的方法。
  40. 一种计算机程序，其特征在于，所述计算机程序使得计算机执行如权利要求1-17中任一项所述的方法。
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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109429343A (zh) * 2017-08-29 2019-03-05 中国信息通信研究院 一种基于多时隙调度的资源分配方法和装置
CN110035508A (zh) * 2018-01-12 2019-07-19 中国信息通信研究院 一种移动通信下行多时隙调度方法和系统
WO2021237751A1 (zh) * 2020-05-29 2021-12-02 Oppo广东移动通信有限公司 数据传输方法、终端设备和网络设备

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109429343A (zh) * 2017-08-29 2019-03-05 中国信息通信研究院 一种基于多时隙调度的资源分配方法和装置
CN110035508A (zh) * 2018-01-12 2019-07-19 中国信息通信研究院 一种移动通信下行多时隙调度方法和系统
WO2021237751A1 (zh) * 2020-05-29 2021-12-02 Oppo广东移动通信有限公司 数据传输方法、终端设备和网络设备
WO2021237860A1 (zh) * 2020-05-29 2021-12-02 Oppo广东移动通信有限公司 数据传输方法、终端设备和网络设备

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
NEC: "Frequency-domain resource allocation schemes for NR", 3GPP DRAFT; R1-1710245 FREQ-DOMAIN RESOURCE ALLOCATION SCHEMES_V2B, vol. RAN WG1, 17 June 2017 (2017-06-17), Qingdao, P.R. China, pages 1 - 6, XP051304884 *

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