WO2024055231A1 - 无线通信的方法及设备 - Google Patents

无线通信的方法及设备 Download PDF

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Publication number
WO2024055231A1
WO2024055231A1 PCT/CN2022/118990 CN2022118990W WO2024055231A1 WO 2024055231 A1 WO2024055231 A1 WO 2024055231A1 CN 2022118990 W CN2022118990 W CN 2022118990W WO 2024055231 A1 WO2024055231 A1 WO 2024055231A1
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terminal
ffp
transmission
sidelink
duration
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PCT/CN2022/118990
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English (en)
French (fr)
Inventor
赵振山
吴作敏
丁伊
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Oppo广东移动通信有限公司
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Priority to PCT/CN2022/118990 priority Critical patent/WO2024055231A1/zh
Publication of WO2024055231A1 publication Critical patent/WO2024055231A1/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 embodiments of the present application relate to the field of communications, and more specifically, to a wireless communication method and device.
  • the sidelink-based access to Unlicensed spectrum (SL-U) system supports semi-static channel access.
  • SL-U in the resource allocation method based on the terminal's autonomous selection of resources, There is no guarantee that a user will perform sideline transmission at the starting position of the Fixed Frame Period (FFP), which may affect sideline transmission within the FFP.
  • FFP Fixed Frame Period
  • the embodiments of the present application provide a wireless communication method and device, which introduces the conditions for the first terminal to perform sideline transmission within the first FFP, thereby ensuring the sideline transmission of the first terminal within the first FFP and optimizing Sidestream transmission within FFP.
  • a wireless communication method which method includes:
  • the first terminal When the first condition is met, the first terminal performs sidelink transmission within the first FFP;
  • the first condition includes at least one of the following:
  • the transmission resources in the FFP have previously detected the COT sharing information of other terminals.
  • the first terminal is the target receiving terminal of the terminal that initiates channel occupation at the starting position of the first FFP.
  • the first terminal is within the first FFP.
  • the target receiving end of the sidelink transmission of the first terminal includes the terminal that initiates channel occupation at the starting position of the first FFP.
  • the target receiving end of the sidelink transmission of the first terminal includes a terminal that sends COT shared information in the first FFP, and the end position of the sideline transmission of the first terminal is located before the start position of the idle time in the first FFP.
  • a second aspect provides a terminal device for executing the method in the first aspect.
  • the terminal device includes a functional module for executing the method in the first aspect.
  • a terminal device including a processor and a memory; the memory is used to store a computer program, and the processor is used to call and run the computer program stored in the memory, so that the terminal device executes the above-mentioned first aspect.
  • a fourth aspect provides a device for implementing the method in the above first aspect.
  • the device includes: a processor, configured to call and run a computer program from a memory, so that a device installed with the device executes the method in the above first aspect.
  • a fifth aspect provides a computer-readable storage medium for storing a computer program, the computer program causing a computer to execute the method in the above-mentioned first aspect.
  • a computer program product including computer program instructions, which cause a computer to execute the method in the first aspect.
  • a seventh aspect provides a computer program that, when run on a computer, causes the computer to execute the method in the first aspect.
  • the conditions for the first terminal to perform sideline transmission within the first FFP are introduced, thereby ensuring the sideline transmission of the first terminal within the first FFP and optimizing the sideline transmission within the FFP.
  • Figure 1 is a schematic diagram of a communication system architecture provided by this application.
  • FIG. 2 is a schematic diagram of another communication system architecture provided by this application.
  • Figure 3 is a schematic diagram of intra-network communication provided by this application.
  • Figure 4 is a schematic diagram of partial network coverage side-link communication provided by this application.
  • Figure 5 is a schematic diagram of a network coverage outer row communication provided by this application.
  • Figure 6 is a schematic diagram of side communication with a central control node provided by this application.
  • Figure 7 is a schematic diagram of a unicast side-link communication provided by this application.
  • Figure 8 is a schematic diagram of a multicast side communication provided by this application.
  • Figure 9 is a schematic diagram of a broadcast side communication provided by this application.
  • Figure 10 is a schematic diagram of a time slot structure in NR-V2X provided by this application.
  • Figure 11 is a schematic diagram of a system bandwidth provided by this application.
  • Figure 12 is a schematic diagram of a resource pool configured on an unlicensed spectrum provided by this application.
  • Figure 13 is a schematic diagram of a fixed frame period provided by this application.
  • Figure 14 is a schematic diagram of no sidelink transmission in the first time slot within a fixed frame period provided by this application.
  • Figure 15 is a schematic flow chart of a wireless communication method provided according to an embodiment of the present application.
  • Figure 16 is a schematic diagram of sidelink transmission based on the starting position of an FFP provided by an embodiment of the present application.
  • Figure 17 is a schematic diagram of a public transmission resource provided according to an embodiment of the present application.
  • Figure 18 is a schematic diagram of a first time window provided according to an embodiment of the present application.
  • Figure 19 is a schematic diagram of channel sensing before the starting position of FFP provided according to an embodiment of the present application.
  • Figure 20 is a schematic diagram of determining a set of candidate transmission resources according to an embodiment of the present application.
  • Figure 21 is a schematic block diagram of a terminal device provided according to an embodiment of the present application.
  • Figure 22 is a schematic block diagram of a communication device provided according to an embodiment of the present application.
  • Figure 23 is a schematic block diagram of a device provided according to an embodiment of the present application.
  • Figure 24 is a schematic block diagram of a communication system provided according to an embodiment of the present application.
  • GSM Global System of Mobile communication
  • CDMA Code Division Multiple Access
  • WCDMA broadband code division multiple access
  • GPRS General Packet Radio Service
  • LTE Long Term Evolution
  • LTE-A Advanced long term evolution
  • NR New Radio
  • NTN Non-Terrestrial Networks
  • UMTS Universal Mobile Telecommunication System
  • WLAN Wireless Local Area Networks
  • WiFi wireless fidelity
  • 5G fifth-generation communication
  • the communication system in the embodiment of the present application can be applied to a carrier aggregation (Carrier Aggregation, CA) scenario, a dual connectivity (Dual Connectivity, DC) scenario, or a standalone (Standalone, SA) deployment scenario.
  • CA Carrier Aggregation
  • DC Dual Connectivity
  • SA standalone deployment scenario.
  • the communication system in the embodiment of the present application can be applied to the unlicensed spectrum, where the unlicensed spectrum can also be considered as a shared spectrum; or the communication system in the embodiment of the present application can also be applied to the licensed spectrum, where, Licensed spectrum can also be considered as unshared spectrum.
  • the embodiments of this application describe various embodiments in combination with network equipment and terminal equipment.
  • the terminal equipment may also be called user equipment (User Equipment, UE), access terminal, user unit, user station, mobile station, mobile station, remote station, remote terminal, mobile device, user terminal, terminal, wireless communication equipment, user agent or user device, etc.
  • User Equipment User Equipment
  • the terminal device can be a station (STATION, ST) in the WLAN, a cellular phone, a cordless phone, a Session Initiation Protocol (Session Initiation Protocol, SIP) phone, a wireless local loop (Wireless Local Loop, WLL) station, or a personal digital assistant.
  • PDA Personal Digital Assistant
  • handheld devices with wireless communication capabilities computing devices or other processing devices connected to wireless modems, vehicle-mounted devices, wearable devices, next-generation communication systems such as terminal devices in NR networks, or in the future Terminal equipment in the evolved Public Land Mobile Network (PLMN) network, etc.
  • PLMN Public Land Mobile Network
  • the terminal device can be deployed on land, including indoor or outdoor, handheld, wearable or vehicle-mounted; it can also be deployed on water (such as ships, etc.); it can also be deployed in the air (such as aircraft, balloons and satellites). superior).
  • the terminal device may be a mobile phone, a tablet computer, a computer with wireless transceiver function, a virtual reality (VR) terminal device, an augmented reality (AR) terminal device, a wireless terminal device in industrial control, a wireless terminal device in self-driving, a wireless terminal device in remote medical, a wireless terminal device in smart grid, a wireless terminal device in transportation safety, a wireless terminal device in a smart city, or a wireless terminal device in a smart home, etc.
  • VR virtual reality
  • AR augmented reality
  • the terminal device may also be a wearable device.
  • Wearable devices can also be called wearable smart devices, which is a general term for applying wearable technology to intelligently design daily wear and develop wearable devices, such as glasses, gloves, watches, clothing and shoes, etc.
  • a wearable device is a portable device that is worn directly on the body or integrated into the user's clothing or accessories. Wearable devices are not just hardware devices, but also achieve powerful functions through software support, data interaction, and cloud interaction.
  • wearable smart devices include full-featured, large-sized devices that can achieve complete or partial functions without relying on smartphones, such as smart watches or smart glasses, and those that only focus on a certain type of application function and need to cooperate with other devices such as smartphones.
  • the network device may be a device used to communicate with mobile devices.
  • the network device may be an access point (Access Point, AP) in WLAN, or a base station (Base Transceiver Station, BTS) in GSM or CDMA.
  • BTS Base Transceiver Station
  • it can be a base station (NodeB, NB) in WCDMA, or an evolutionary base station (Evolutional Node B, eNB or eNodeB) in LTE, or a relay station or access point, or a vehicle-mounted device, a wearable device, and an NR network network equipment or base station (gNB) or network equipment in the future evolved PLMN network or network equipment in the NTN network, etc.
  • NodeB base station
  • gNB NR network network equipment or base station
  • the network device may have mobile characteristics, for example, the network device may be a mobile device.
  • the network device can be a satellite or balloon station.
  • the satellite can be a low earth orbit (LEO) satellite, a medium earth orbit (MEO) satellite, a geosynchronous orbit (geostationary earth orbit, GEO) satellite, a high elliptical orbit (High Elliptical Orbit, HEO) satellite ) satellite, etc.
  • the network device may also be a base station installed on land, water, etc.
  • network equipment can provide services for a cell, and terminal equipment communicates with the network equipment through transmission resources (for example, frequency domain resources, or spectrum resources) used by the cell.
  • the cell can be a network equipment ( For example, the cell corresponding to the base station), the cell can belong to the macro base station, or it can belong to the base station corresponding to the small cell (Small cell).
  • the small cell here can include: urban cell (Metro cell), micro cell (Micro cell), pico cell ( Pico cell), femto cell (Femto cell), etc. These small cells have the characteristics of small coverage and low transmission power, and are suitable for providing high-rate data transmission services.
  • the "instruction” mentioned in the embodiments of this application may be a direct instruction, an indirect instruction, or 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, and B can be obtained through C; it can also mean that there is an association between A and B. relation.
  • correlate can mean that there is a direct correspondence or indirect correspondence between the two, it can also mean that there is an associated relationship between the two, or it can mean indicating and being instructed, configuration and being. Configuration and other relationships.
  • predefinition or “preconfiguration” can be achieved by pre-saving corresponding codes, tables or other methods that can be used to indicate relevant information in devices (for example, including terminal devices and network devices).
  • devices for example, including terminal devices and network devices.
  • predefined can refer to what is defined in the protocol.
  • the "protocol” may refer to a standard protocol in the communication field, which may include, for example, LTE protocol, NR protocol, and related protocols applied in future communication systems. This application does not limit this.
  • FIG. 1 is a schematic diagram of a communication system applicable to the embodiment of the present application.
  • the transmission resources of the vehicle-mounted terminals (vehicle-mounted terminal 121 and vehicle-mounted terminal 122) are allocated by the base station 110, and the vehicle-mounted terminals transmit data on the sidelink according to the resources allocated by the base station 110.
  • the base station 110 may allocate resources for a single transmission to the terminal, or may allocate resources for semi-static transmission to the terminal.
  • FIG. 2 is a schematic diagram of another communication system applicable to the embodiment of the present application.
  • the vehicle-mounted terminals (vehicle-mounted terminal 131 and vehicle-mounted terminal 132) independently select transmission resources on the resources of the side link for data transmission.
  • the vehicle-mounted terminal can select transmission resources randomly or select transmission resources through listening.
  • side-link communication according to the network coverage of the communicating terminal, it can be divided into side-link communication inside the network coverage, as shown in Figure 3; side-link communication with partial network coverage, as shown in Figure 4; and outside network coverage communication, as shown in Figure 5.
  • Figure 3 In side-link communication within network coverage, all terminals performing side-link communication are within the coverage of the base station. Therefore, the above-mentioned terminals can perform side-link communication based on the same side-link configuration by receiving configuration signaling from the base station. .
  • FIG 4 When part of the network covers side-link communication, some terminals performing side-link communication are located within the coverage of the base station. These terminals can receive the configuration signaling of the base station and perform side-link communication according to the configuration of the base station. The terminal located outside the network coverage cannot receive the configuration signaling of the base station. In this case, the terminal outside the network coverage will use the pre-configuration information and the physical signal sent by the terminal located within the network coverage.
  • the information carried in the Physical Sidelink Broadcast Channel (PSBCH) determines the sidelink configuration and performs sidelink communication.
  • PSBCH Physical Sidelink Broadcast Channel
  • Figure 5 For side-link communication outside network coverage, all terminals performing side-link communication are located outside the network coverage, and all terminals determine the side-link configuration based on pre-configuration information for side-link communication.
  • FIG. 6 For side-line communication with a central control node, multiple terminals form a communication group.
  • the communication group has a central control node, which can also be called the cluster head terminal (Cluster Header, CH).
  • the central control node has the following One of the functions: Responsible for the establishment of communication groups; joining and leaving group members; coordinating resources, allocating sideline transmission resources to other terminals, receiving sideline feedback information from other terminals; coordinating resources with other communication groups, etc.
  • device-to-device communication is a Sidelink (SL) transmission technology based on Device to Device (D2D), which is different from the traditional cellular system in which communication data is received or sent through the base station. The method is different, so it has higher spectrum efficiency and lower transmission delay.
  • the Internet of Vehicles system uses end-to-end direct communication. There are two transmission modes defined in 3GPP, which are recorded as: first mode (sidelink resource allocation mode 1) and second mode (sidelink resource allocation mode 2).
  • the transmission resources of the terminal are allocated by the base station, and the terminal transmits data on the sidelink according to the resources allocated by the base station; the base station can allocate resources for a single transmission to the terminal, or can allocate semi-static transmission to the terminal.
  • the terminal is located within the network coverage, and the network allocates transmission resources for sidelink transmission to the terminal.
  • the terminal selects a resource in the resource pool for data transmission. As shown in Figure 5, the terminal is located outside the cell coverage, and the terminal independently selects transmission resources from the preconfigured resource pool for sideline transmission; or, as shown in Figure 3, the terminal independently selects transmission resources from the network configured resource pool. Perform lateral transmission.
  • NR-V2X New Radio-Vehicle to Everything
  • autonomous driving is supported, which puts forward higher requirements for data interaction between vehicles, such as higher throughput, lower latency, higher reliability, larger coverage, more flexible resource allocation, etc.
  • unicast, multicast and broadcast transmission methods are supported.
  • unicast transmission there is only one receiving terminal.
  • the receiving terminal is all terminals in a communication group, or in a certain All terminals within the transmission distance, as shown in Figure 8, UE1, UE2, UE3 and UE4 form a communication group, in which UE1 sends data, and other terminal devices in the group are receiving terminals; for broadcast transmission methods, their receiving terminals
  • the terminal is any terminal around the sending terminal.
  • UE1 is the sending terminal, and the other terminals around it, UE2-UE6, are all receiving terminals.
  • the time slot structure in NR-V2X is shown in Figure 10.
  • (a) in Figure 10 indicates the time slot structure that does not include the physical sidelink feedback channel (PSFCH) in the time slot; the figure in Figure 10 ( b) Indicates the slot structure including PSFCH.
  • PSFCH physical sidelink feedback channel
  • the Physical Sidelink Control Channel starts from the second sidelink symbol of the time slot in the time domain and occupies 2 or 3 orthogonal frequency division multiplexing (Orthogonal frequency- division multiplexing (OFDM) symbols can occupy ⁇ 10,12 15,20,25 ⁇ physical resource blocks (PRB) in the frequency domain.
  • OFDM orthogonal frequency- division multiplexing
  • PSSCH physical sidelink shared channel
  • the sub-channel is the minimum granularity of physical sidelink shared channel (PSSCH) resource allocation in NR-V2X
  • the number of PRBs occupied by PSCCH must be less than or equal to the number of PRBs contained in a sub-channel in the resource pool. , so as not to cause additional restrictions on PSSCH resource selection or allocation.
  • PSSCH also starts from the second sidelink symbol of the time slot in the time domain.
  • the last time domain symbol in the time slot is the Guard Period (GP) symbol, and the remaining symbols are mapped to the PSSCH.
  • the first siderow symbol in this time slot is a repetition of the second siderow symbol.
  • the receiving terminal uses the first siderow symbol as an automatic gain control (Automatic gain control, AGC) symbol.
  • AGC automatic gain control
  • the data is generally not used for data demodulation.
  • PSSCH occupies A sub-channel in the frequency domain.
  • Each sub-channel includes B consecutive PRBs.
  • the penultimate symbol and the penultimate symbol in the time slot are used as PSFCH channel transmission, and the data on the penultimate symbol is a repetition of the data on the penultimate symbol.
  • One time domain symbol before the PSFCH channel is used as a GP symbol, as shown in (b) in Figure 10.
  • Unlicensed spectrum is a spectrum allocated by countries and regions that can be used for radio equipment communication. This spectrum is usually considered a shared spectrum, that is, communication equipment in different communication systems can use the spectrum as long as it meets the regulatory requirements set by the country or region on the spectrum. To use this spectrum, there is no need to apply for exclusive spectrum authorization from the government. Unlicensed spectrum can also be called shared spectrum, unlicensed spectrum, unlicensed spectrum, unlicensed frequency band, unlicensed frequency band or unlicensed frequency band, etc.
  • LBT Listen Before Talk
  • MCOT Maximum Channel Occupancy Time
  • NR-U Unlicensed spectrum
  • a comb resource includes N physical resource blocks (PRBs) discrete in the frequency domain.
  • PRBs physical resource blocks
  • the PRB included in the mth comb is ⁇ m,M+m,2M +m,3M+m,... ⁇ , as shown in Figure 11:
  • RB resource blocks
  • N 6 PRB
  • the PRB included in a comb tooth can also be called an Interlaced Resource Block (IRB), and the comb tooth can also be called an IRB.
  • IRB Interlaced Resource Block
  • resource block set (Resource Block Set, RB set) related to the present application is described below.
  • Figure 12 is an example of a resource pool configured on an unlicensed spectrum provided by this embodiment of the present application.
  • a resource pool is configured on the unlicensed spectrum or shared spectrum for sidelink transmission through preconfiguration information or network configuration information.
  • the resource pool includes M1 resource block sets, wherein one resource block set includes M2 resource blocks (Resource Blocks, RBs), and M1 and M2 are positive integers.
  • a resource block set corresponds to a channel in the unlicensed spectrum (or shared spectrum), or a resource block set corresponds to the minimum frequency domain granularity for LBT, or a resource block set corresponds to an LBT subband.
  • the bandwidth corresponding to a channel on the unlicensed spectrum is 20MHz, that is, the bandwidth corresponding to a resource block set is also 20MHz.
  • the bandwidth of a channel on an unlicensed spectrum is 20MHz, corresponding to M3 RBs.
  • the resource block set may also be called a channel or LBT subband, which is not limited in the embodiment of the present application.
  • the frequency domain starting position of the resource pool is the same as the frequency domain starting position of the first resource block set among the M1 resource block sets, wherein the first resource block set is the The resource block set with the lowest frequency domain position among the M1 resource block sets.
  • the frequency domain end position of the resource pool is the same as the frequency domain end position of the second resource block set in the M1 resource block sets, wherein the second resource block set is the M1 resource block set.
  • the resource block set with the highest frequency domain position in the resource block set is the same as the frequency domain end position of the second resource block set in the M1 resource block sets, wherein the second resource block set is the M1 resource block set.
  • resource block set 0 has the lowest frequency domain position.
  • the frequency domain position of resource block set 2 is the highest. Therefore, the frequency domain starting position of this resource pool is the same as the frequency domain starting position of resource block set 0, or the frequency domain starting position of this resource pool is based on resource block set 0.
  • the frequency domain start position of the resource pool is determined; the frequency domain end position of the resource pool is the same as the frequency domain end position of the resource block set 2, or the frequency domain end position of the resource pool is determined based on the frequency domain end position of the resource block set 2.
  • a guard band (Guard Band, GB) is included between two adjacent resource block sets among the M1 resource block sets included in the resource pool.
  • the guard band may also be called a guard band.
  • the frequency domain starting position and frequency domain size of the protection frequency band are determined according to preconfiguration information or network configuration information.
  • the terminal obtains preconfiguration information or network configuration information, and the preconfiguration information or network configuration information is used to configure the protection frequency band.
  • guard bands are used to separate resource block sets RB sets.
  • protection frequency bands are configured in the sideband bandwidth part (Band Width Part, BWP), corresponding to protection frequency band 0, protection frequency band 1 and protection frequency band 2 respectively.
  • BWP Band Width Part
  • Each protection frequency band separates four resource block sets.
  • the start position and end position of each resource block set in the frequency domain can be determined by using the starting point of the guard frequency band shown in the figure) and the frequency domain size of the guard frequency band (that is, the length of the guard frequency band shown in the figure).
  • a sidelink resource pool is configured in the sidelink BWP.
  • the sidelink resource pool includes three resource block sets, namely resource block set 0 to resource block 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) corresponds to the frequency domain starting position of resource block set 0, and the frequency domain end position of the resource pool (that is, the end point of the resource pool shown in the figure) corresponds to the frequency domain of resource block set 2. The end position of the domain.
  • a resource block set includes multiple comb teeth.
  • each resource block set in Figure 12 may include multiple comb teeth.
  • a PSSCH may be sent in one or more resource block sets. In still other embodiments, a PSSCH may be transmitted in one or more resource block sets, and the PSSCH occupies one or more comb teeth in the one or more resource block sets.
  • the NR-U system supports two channel monitoring methods: one is Load based equipment (LBE) LBT, also known as dynamic channel monitoring or dynamic channel occupancy, and the other is frame structure-based equipment ( Frame based equipment (FBE) LBT, also known as semi-static channel monitoring or semi-static channel occupancy.
  • LBE Load based equipment
  • FBE Frame based equipment
  • Dynamic channel monitoring can also be considered as an LBT method based on LBE.
  • the principle of channel monitoring is that the communication equipment performs LBT on the carrier of the unlicensed spectrum after the service arrives, and starts transmitting signals on the carrier after the LBT is successful.
  • the LBT method of dynamic channel monitoring includes Type 1 channel access method and Type 2 channel access method.
  • LBT listen before talk
  • LBT listen before talk
  • the LBT method in NR-U mainly includes Type 1 channel access method and Type 2 channel access method. In the embodiment of this application, the channel access method is also called the LBT method.
  • Type1 channel access multi-slot channel detection based on random backoff adjusted by the contention window size.
  • channel occupation with a length of T mcot can be initiated.
  • the base station uses the LBT method of Type1.
  • the data can also share the Channel Occupancy Time (COT) to the UE.
  • COT Channel Occupancy Time
  • the UE uses the Type 1 LBT method.
  • it can also share the COT with the base station.
  • Table 1 below shows the channel access priority and corresponding parameters when the terminal performs Type1 LBT.
  • m p refers to the number of fallback 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.
  • p 1 is the highest priority.
  • Type 2 is a channel access method based on fixed-length channel monitoring time slots.
  • Type2A channel access The UE's channel detection method is 25 microseconds ( ⁇ s) channel detection. Specifically, under Type2A channel access, the UE can monitor the channel for 25 ⁇ s before starting transmission, and transmit after the channel monitoring is successful (that is, the channel is idle).
  • Type2B channel access The UE’s channel detection method is 16 ⁇ s channel detection. Specifically, under Type2B channel access, the UE can monitor the channel for 16 ⁇ s before starting transmission, and transmit after the channel monitoring is successful (that is, the channel is idle). Wherein, the gap size between the starting position of this transmission and the end position of the previous transmission is 16 ⁇ s, or the gap size between the starting position of this transmission and the ending position of the previous transmission is greater than or equal to 16 ⁇ s and less than 25 ⁇ s.
  • Type2C channel access UE transmits without performing channel detection after the gap ends. Specifically, under Type2C channel access, the UE can directly transmit. Wherein, the gap size between the starting position of the transmission and the end position of the previous transmission is less than or equal to 16 ⁇ s and the length of the transmission does not exceed 584 ⁇ s.
  • the NR-U system in addition to supporting the channel access mechanism of LBE, it also supports the channel access mechanism of FBE.
  • the channel access mechanism of FBE can increase frequency reuse, but it has higher requirements on interference environment and synchronization during network deployment. Therefore, FBE mode is usually applied to communication systems where there is no LBE mode sharing unlicensed spectrum in the surrounding environment.
  • a frame structure appears periodically, that is, the channel resources that the communication device can use for service transmission appear periodically.
  • a frame structure includes fixed frame period (Fixed Frame Period, FFP), channel occupancy time (channel occupancy time, COT), and idle time (idle duration).
  • FFP Fixed Frame Period
  • COT channel occupancy time
  • Idle duration idle time
  • the length of the fixed frame period can be configured in the range of 1 to 10ms
  • the length of the COT in the fixed frame period (FFP) does not exceed 95% of the FFP length
  • the length of the idle time is at least 5% of the FFP length
  • the minimum value is 100 ⁇ s, with the idle time at the end of the fixed frame period.
  • the communication device performs channel monitoring based on fixed-length listening time slots during idle time. If the channel is idle, the COT in the next fixed frame period can be used to transmit signals; otherwise, the COT in the next fixed frame period cannot Used to transmit signals.
  • the fixed length listening slot corresponds to 9 ⁇ s or 16 ⁇ s.
  • the semi-static channel access mode can be configured by the base station through system information or through high-level parameters. If a serving cell is configured by the base station in the semi-static channel access mode, then the FFP length of the fixed frame period of the serving cell is T x , the maximum COT length included in the fixed frame period of the serving cell is T y , and the serving cell The length of the idle time included in the FFP is T z . Among them, the length T x of the fixed frame period FFP that the base station can configure is 1ms, 2ms, 2.5ms, 4ms, 5ms, or 10ms. The UE can determine Ty and T z according to the configured T x length.
  • Figure 13 gives an example when the fixed frame period length is 4ms.
  • the UE can determine x ⁇ 0,1,2,3 based on x ⁇ 0,1,...,20/T x -1 ⁇ ,4 ⁇ , and then the UE can determine the starting position of each FFP in each two consecutive radio frames as 0ms, 4ms, 8ms, 12ms, and 16ms.
  • gNB or UE In the semi-static channel access of the NR-U system, gNB or UE is supported to perform a fixed-length LBT before the starting position of the fixed frame period. If the LBT is successful (i.e., the channel is idle), the gNB performs downlink transmission or the UE performs uplink transmission. To initiate channel occupation, since in the NR-U system, downlink transmission resources and uplink transmission resources are scheduled based on the base station, the base station can ensure that there is downlink transmission or uplink transmission at the starting position of the fixed frame period, so that gNB or The UE can perform corresponding LBT and initiate channel occupation after the LBT is successful.
  • the length of LBT is fixed.
  • the channel can be considered to be idle. If the sidelink subcarrier size is 15 kHz, the length of one FFP includes 4 time slots.
  • this application proposes a sideline transmission scheme, which introduces the conditions for the first terminal to perform sideline transmission within the first FFP, thereby ensuring the sideline transmission of the first terminal within the first FFP and optimizing Sidestream transmission within FFP.
  • FIG 15 is a schematic flowchart of a wireless communication method 200 according to an embodiment of the present application.
  • the wireless communication method 200 may include at least part of the following content:
  • the first terminal performs sidelink transmission in the first FFP; wherein the first condition includes at least one of the following: channel detection performed by the first terminal before the first FFP.
  • the listening result is idle, the first terminal has detected the sideline transmission of other terminals before the transmission resources in the first FFP, and the first terminal has detected the COT sharing information of other terminals before the transmission resources in the first FFP.
  • the first terminal is the target receiving terminal of the terminal that initiates channel occupation at the starting position of the first FFP
  • the first terminal is the target receiving terminal of the terminal that sends COT sharing information in the first FFP
  • the first terminal The target receiving end of the sidelink transmission of the terminal includes the terminal that initiates channel occupation at the starting position of the first FFP
  • the target receiving end of the sidelink transmission of the first terminal includes the terminal that sends COT shared information in the first FFP.
  • the end position of the sidelink transmission of the first terminal is located before the start position of the idle time in the first FFP.
  • the conditions for the first terminal to perform sideline transmission within the first FFP are introduced, thereby ensuring the sideline transmission of the first terminal within the first FFP and optimizing the sideline transmission within the FFP.
  • the first condition is agreed upon by a protocol, or the first condition is determined by preconfiguration information, or the first condition is configured by a network device, or the first condition is based on the indication information of the second terminal. It is determined that the second terminal is a terminal that initiates channel occupation at the starting position of the first FFP, or the second terminal is a terminal that sends COT sharing information within the first FFP.
  • the first FFP can be any FFP in the FFP cycle.
  • the first FFP is the last FFP among the 3 FFPs shown in Figure 14.
  • the first terminal performs channel sensing (sensing) before the starting time of the first FFP, and the first terminal determines whether sidelink transmission can be performed within the first FFP according to the sensing result. For example, if the listening result is idle, the first terminal determines that sidelink transmission can be performed within the first FFP.
  • the first terminal performs channel sensing (sensing) before the starting time of the first FFP, including: the first terminal performs channel sensing on an FFP adjacent to the first FFP and located before the first FFP. Perform channel listening during the idle time.
  • the idle time may be part or all of the idle time within the FFP.
  • the first terminal receives first configuration information, wherein the first configuration information is used to indicate a semi-static channel access method, or the first configuration information is used to indicate using a semi-static channel access method.
  • Perform channel access For example, the first terminal receives the first configuration information sent by a network device, or the first terminal receives the first configuration information sent by a second terminal, where the second terminal starts from the first FFP.
  • the second terminal is the terminal that initiates channel occupation at the original position, or the second terminal is the terminal that sends COT sharing information in the first FFP.
  • the first terminal receives second configuration information, wherein the second configuration information includes semi-static channel access configuration parameters; the first terminal determines at least one of the following information based on the second configuration information : FFP period information, FFP starting position, length of idle time in FFP, maximum channel occupation time in FFP.
  • FFP period information FFP starting position
  • length of idle time in FFP maximum channel occupation time in FFP.
  • the first terminal receives the second configuration information sent by the network device, or the first terminal receives the second configuration information sent by the second terminal, where the second terminal starts from the first FFP.
  • the second terminal is the terminal that initiates channel occupation at the original position, or the second terminal is the terminal that sends COT sharing information in the first FFP.
  • the semi-static channel access configuration parameters include a period parameter (in milliseconds (ms)) and an offset parameter (indicated by the number of OFDM symbols).
  • the first terminal is a terminal that selects or reserves transmission resources in the first FFP, or the first terminal is a sidelink transmission resource allocated by a network device in the first FFP. terminal.
  • the transmission resources of the first terminal in the first FFP may be transmission resources selected or reserved by the first terminal in the first FFP. In some embodiments, the transmission resources of the first terminal in the first FFP may be transmission resources allocated by the network device to the first terminal.
  • the starting position of the transmission resource of the first terminal in the first FFP is located behind the starting position of the first FFP.
  • the starting position of the transmission resource of the first terminal in the first FFP is the same as the starting position of the first FFP.
  • the first FFP may include one or more transmission resources selected or reserved by the terminal.
  • the embodiments of the present application are not limited to this.
  • the first FFP may include one or more transmission resources of the first terminal, which is not limited in this embodiment of the present application.
  • the sidelink transmission of other terminals detected by the first terminal includes But not limited to at least one of the following: physical sidelink shared channel (PSSCH), physical sidelink control channel (PSCCH), physical sidelink feedback channel (Physical Sidelink Feedback Channel, PSFCH), sidelink synchronization signal block (Sidelink Synchronization Signal Block) , S-SSB), Sidelink Control Information (SCI).
  • PSSCH physical sidelink shared channel
  • PSCCH physical sidelink control channel
  • PSFCH Physical Sidelink feedback channel
  • S-SSB Sidelink Control Information
  • the first terminal if the first condition is that the channel sensing result performed by the first terminal before the first FFP is idle, and the first condition is met, the first terminal starts at the starting position of the first FFP. Sidelink transmission, and/or the first terminal performs sidelink transmission on the transmission resources within the first FFP.
  • the first terminal may occupy the channel by starting sidelink transmission at the starting position of the first FFP.
  • the first condition is that the first terminal detects the sidelink transmission of other terminals before the transmission resource in the first FFP, if the first condition is met, the first terminal in the first FFP Sidelink transmission is performed on the transmission resource.
  • the first terminal detects the COT sharing information of other terminals before the transmission resources in the first FFP. If the first condition is met, the first terminal detects the COT sharing information in the first FFP. Sidelink transmission is performed on the transmission resource.
  • the first condition is that the first terminal is the target receiving terminal of the terminal that initiates channel occupation at the starting position of the first FFP, and if the first condition is met, the first terminal is within the first FFP Sidelink transmission is performed on the transmission resources.
  • the transmission of the first terminal in the first FFP Sidelink transmission is performed on the resource.
  • the first terminal Sidelink transmission is performed on the transmission resources within the first FFP.
  • the first terminal Sidelink transmission is performed on the transmission resources within FFP.
  • the first condition is that the channel sensing result performed by the first terminal before the first FFP is idle and the end position of the sidelink transmission of the first terminal is located at the starting position of the idle time in the first FFP Previously, when the first condition is met, the first terminal starts sidelink transmission at the starting position of the first FFP, and/or the first terminal performs sidelink transmission on the transmission resources within the first FFP.
  • the first terminal performs sidelink transmission on the transmission resource in the first FFP.
  • the first terminal performs sidelink transmission on the transmission resource in the first FFP.
  • the first terminal performs sidelink transmission on the transmission resource in the first FFP.
  • the first terminal performs sidelink transmission on the transmission resource in the first FFP.
  • the first terminal performs sidelink transmission on the transmission resource in the first FFP.
  • the first terminal performs sidelink transmission on the transmission resource in the first FFP.
  • the first condition at least includes that the channel sensing result performed by the first terminal before the first FFP is idle, and if the first condition is met, the first terminal performs the listening operation within the first FFP.
  • Sidelink transmission includes: the first terminal starts sidelink transmission from the starting position of the first FFP.
  • the duration of the sidelink transmission started by the first terminal at the starting position of the first FFP is determined based on at least one of the following: preconfiguration information, network configuration information, resource pool configuration information, sidelink BWP Configuration information, semi-static channel access configuration information, duration corresponding to one OFDM symbol, channel access priority information or sidelink priority information.
  • the preconfiguration information includes a parameter, which is used to indicate the duration corresponding to the channel occupation initiated by the first terminal. That is, the parameter may indicate the sidelink started by the first terminal at the starting position of the first FFP. The duration of the transfer.
  • the network configuration information includes a parameter that is used to indicate the duration corresponding to the channel occupation initiated by the first terminal. That is, the parameter may indicate the sidelink started by the first terminal at the starting position of the first FFP. The duration of the transfer.
  • the resource pool configuration information includes a parameter, which is used to indicate the duration corresponding to the first terminal initiating channel occupation. That is, the parameter can indicate the first terminal starting from the starting position of the first FFP. The duration of the line transfer.
  • the semi-static channel access configuration information includes one or more parameters, and the one or more parameters are used to indicate the duration corresponding to the first terminal initiating channel occupation. That is, the one or more parameters may indicate that the first terminal initiates channel occupation.
  • the channel access priority information can be determined based on preconfiguration information or network configuration information, or based on quality of service (Quality of Service, QoS) information of sidelink data, PC5 5G Service Quality Identifier (PC5 5G QoS Identifier, PQI ) information or sideline priority determination.
  • QoS Quality of Service
  • PC5 5G Service Quality Identifier PC5 5G QoS Identifier, PQI
  • the first terminal can determine the duration corresponding to the channel occupation initiated by the first terminal based on the channel access priority information, that is, determine the side that the first terminal starts from the starting position of the first FFP. The duration of the line transfer.
  • the corresponding relationship between the channel access priority information and the channel occupancy duration is determined through preconfiguration information or network configuration information, and the first terminal determines the channel occupancy corresponding to the channel occupancy initiated by the first terminal according to the channel access priority and the corresponding relationship. duration.
  • the sidelink priority information may be determined based on preconfiguration information or network configuration information, or based on QoS information, PQI information or sidelink priority of sidelink data.
  • the first terminal can determine the duration corresponding to the channel occupation initiated by the first terminal based on the sidelink priority information, that is, determine the sidelink started by the first terminal from the starting position of the first FFP.
  • the duration of the transfer Specifically, the corresponding relationship between the sidelink priority and the channel occupation duration is determined through preconfiguration information or network configuration information, and the first terminal determines the duration corresponding to the first terminal initiating channel occupation based on the sidelink priority and the corresponding relationship.
  • PSCCH and PSSCH its sidelink priority is determined based on the priority information field in the SCI; for PSFCH, its sidelink priority is determined based on the sidelink priority of the PSSCH corresponding to the PSFCH; for S-SSB, its sidelink The priority is determined based on preconfiguration information or network configuration information.
  • the first terminal when the duration of the sidelink transmission performed by the first terminal starting at the starting position of the first FFP is determined based on the duration corresponding to one OFDM symbol, the first terminal starts at the starting position of the first FFP.
  • the duration of sidelink transmission starting from the starting position shall not exceed the duration corresponding to one OFDM symbol.
  • the duration corresponding to one OFDM symbol includes the duration corresponding to a cyclic prefix (Cyclic Prefix, CP).
  • the duration corresponding to one OFDM symbol does not include the duration corresponding to the cyclic prefix (Cyclic Prefix, CP).
  • the sidelink transmission started at the starting position of the first FFP The duration does not exceed the duration corresponding to one OFDM symbol, reducing the impact on the AGC processing at the receiving end.
  • the duration of the sidelink transmission started by the first terminal at the starting position of the first FFP is determined based on the following formula 1:
  • T 1 represents the duration of the sidelink transmission started by the first terminal at the starting position of the first FFP
  • T 2 represents the duration corresponding to one OFDM symbol, 0 ⁇ S ⁇ 1.
  • the value of S is determined based on resource pool configuration information, or the value of S is determined based on sideline BWP configuration information, or the value of S is determined based on semi-static channel access configuration information, or S The value is determined based on the predefined information of the protocol.
  • both UE1 and UE2 perform sideline transmission with a duration of T 1 at the starting position of FFP (that is, the third FFP among the three FFPs shown in Figure 16) (that is, time slot n in Figure 16), at the same time , there is UE0 performing sidelink transmission in time slot n.
  • UE0 uses all other symbols (i.e. symbols 0 to 12) except the last GP symbol in time slot n to perform sideline transmission, where the first symbol is AGC adjustment is performed at the receiving end.
  • UE1 and UE2 also perform sideline transmission on the first half of the first symbol, only UE0 performs data transmission on the second half of the first symbol. Therefore, the receiving end The second half of the first symbol can be used to perform AGC adjustment, so that the sidelink data sent by UE0 in time slot n can be correctly received.
  • the duration of the sidelink transmission performed by the first terminal starting from the starting position of the first FFP is based on the OFDM symbols corresponding to the first time slot in the first FFP that can be used for sidelink transmission. Duration determined.
  • the duration of the sidelink transmission performed by the first terminal starting from the starting position of the first FFP is based on the duration corresponding to the OFDM symbols available for PSSCH transmission in the first slot in the first FFP.
  • the duration of the sidelink transmission performed by the first terminal starting from the starting position of the first FFP is equal to the duration corresponding to the OFDM symbol used for PSSCH transmission in the first time slot in the first FFP.
  • the embodiments of the present application do not limit the frequency domain resources corresponding to the sidelink transmission performed by the first terminal starting from the starting position of the first FFP.
  • the first terminal starts from the starting position of the first FFP.
  • the frequency domain resource corresponding to the sidelink transmission started may include one or more IRBs, or include one or more sub-channels, or include one or more PRBs.
  • the transmission resources corresponding to the sidelink transmission performed by the first terminal starting from the starting position of the first FFP are transmission resources randomly selected in the first time slot in the first FFP, or , the transmission resources corresponding to the sidelink transmission performed by the first terminal starting from the starting position of the first FFP are part or all of the common transmission resources in the first time slot in the first FFP.
  • public transmission resources are transmission resources shared by multiple terminals.
  • the size of the common transmission resource is determined based on the frequency domain resource granularity of PSSCH.
  • the common transmission resource corresponds to one or more comb resources.
  • the common transmission resource corresponds to one or more sub-channels.
  • the common transmission resource includes a group of frequency domain contiguous PRBs or two groups of frequency domain contiguous PRBs, wherein each group of frequency domain contiguous PRBs includes at least one PRB.
  • the common transmission resource includes two groups of frequency domain contiguous PRBs
  • one group of frequency domain contiguous PRBs includes the PRB with the lowest index
  • the other group of frequency domain contiguous PRBs includes the PRB with the highest index.
  • the public transmission resources are located at both ends of the frequency domain position of the channel to meet the requirements of occupied channel bandwidth (OCB).
  • the PRB with the lowest index may correspond to the lowest index of the PRB in the resource pool, RB set, or channel.
  • the PRB with the highest index may correspond to the highest index of the PRB in the resource pool, or RB set, or channel.
  • the frequency domain size and/or frequency domain location of the common transmission resource is determined based on at least one of the following:
  • Preconfiguration information network configuration information, resource pool configuration information, sideline BWP configuration information, semi-static channel access configuration information.
  • the transmission resources corresponding to the sidelink transmission started by the first terminal at the starting position of the first FFP are part or all of the common transmission resources in the first time slot in the first FFP. Under this condition, when other terminals select resources, they exclude transmission resources that overlap with the public transmission resources.
  • the configuration of semi-static channel access can be the same as that shown in Figure 13.
  • the transmission resources of UE0, UE1, and UE2 are respectively located in FFP (that is, the three FFPs shown in Figure 17
  • the first time slot (time slot n), the second time slot (time slot n+1) and the third time slot (time slot n+2) within the third FFP), if UE1 and UE2 are in Listening is performed before the starting time of the FFP. If the channel is idle and UE1 and UE2 perform sidelink transmission at the starting position of the FFP to initiate channel occupation, then UE1 and UE2 can use the first time slot (time slot) in the FFP Sidelink transmission is performed in the public transmission resource in n).
  • the public transmission resource is located in sub-channel 3 in the first time slot (time slot n), that is, both UE1 and UE2 use this sub-channel 3.
  • time slot n the transmission resources of UE0 in time slot n cannot include subchannel 3 to avoid interference.
  • UE0 can use the resources corresponding to the remaining subchannels for sidelink transmission, that is, the available subchannels for UE0 include subchannel 0, Sub-channel 1 and sub-channel 2.
  • the first terminal is a terminal that selects or reserves transmission resources in the first FFP, or the first terminal is a terminal that is allocated transmission resources by a network device in the first FFP. That is, all terminals that select or reserve transmission resources in the first FFP or all terminals that are allocated transmission resources by the network device can perform channel sensing before the starting time of the first FFP.
  • these terminals can perform transmission before the starting position of the first FFP. Listening, if the channel is idle, channel occupation can be initiated at the first FFP starting position. Since these terminals have successfully passed listening and initiated channel occupation, when these terminals use the selected or reserved transmission resources for sidelink transmission , corresponding side transmission can be performed without detecting the side transmission or shared COT of other terminals in the first FFP.
  • UE1 and UE2 are respectively in the second time slot (time slot n+1) and the third time slot in the FFP (that is, the third FFP among the 3 FFPs shown in Figure 14).
  • Transmission resources are selected in the time slot (time slot n+2), but there is no UE in the first time slot (time slot n) in the FFP for sidelink transmission.
  • UE1 and UE2 perform sidelink transmission in the idle time before the FFP. Listening, if the channel is idle, UE1 and UE2 initiate channel occupation, for example, UE1 and UE2 perform sidelink transmission of duration T 1 .
  • the sidelink transmission is different from the previous sidelink transmission (the previous sidelink transmission can be the sidelink transmission of UE1 , or the interval between sideline transmissions of other UEs) is less than or equal to 16 ⁇ s, then UE1 can directly perform sideline transmission without listening; if the interval between this sideline transmission and the previous sideline transmission is greater than 16 ⁇ s, then UE1 performs listening for the first listening duration. If the listening result is that the channel is idle, UE1 can perform sidelink transmission, otherwise the sidelink transmission is discarded.
  • the first listening duration is equal to 9 ⁇ s or 16 ⁇ s; further, UE1 performs listening for the first listening duration within a third duration, and the third duration is equal to 25 ⁇ s.
  • the sidelink transmission is different from the previous sidelink transmission (the previous sidelink transmission can be the sidelink transmission of UE2 , or the interval between sideline transmissions of other UEs) is less than or equal to 16 ⁇ s, then UE2 can directly perform sideline transmission without listening; if the interval between this sideline transmission and the previous sideline transmission is greater than 16 ⁇ s, then UE2 performs the first listening duration of listening.
  • the listening result is that the channel is idle, UE2 can perform sidelink transmission, otherwise the sidelink transmission is discarded; where the first listening duration is equal to 9 ⁇ s or 16 ⁇ s; further , UE2 performs listening of the first listening duration within a third duration, and the third duration is equal to 25 ⁇ s.
  • the first listening duration shown in Figure 14 is determined according to the listening duration corresponding to Type 2A channel access or Type 2B channel access or Type 2C channel access.
  • the first terminal is a terminal that selects or reserves transmission resources within the first time window within the first FFP, or the first terminal is a terminal within the first time window within the first FFP.
  • the position and/or length of the first time window is agreed upon by a protocol, or the position and/or length of the first time window is determined by preconfigured information, or the position and/or length of the first time window are /or the length is determined by network device configuration information.
  • the length of the first time window is determined based on the first duration, wherein the value of the first duration is associated with the size of the subcarrier interval.
  • the first duration is expressed as in, The value of can be shown in Table 2 below.
  • the first duration is determined by at least one of the following: detection time of PSCCH, detection time of COT shared information, detection time of sidelink synchronization signal, and detection time of PSFCH channel.
  • the first terminal listens before the starting position of the first FFP. If the channel is idle, the first terminal starts from the first FFP. Sidelink transmission begins at the starting position of the FFP. If terminals in other time slots within the first FFP can detect the sidelink transmission of the first terminal, other terminals can determine that the first FFP is occupied by sidelink transmission, and then proceed Corresponding sidelink transmission; however, other terminals require processing time to detect PSCCH Only transmission resources are located after the first slot within the first FFP Only the terminal can determine whether the PSCCH can be detected. Otherwise, the PSCCH cannot be detected, and it cannot determine whether there is sidelink transmission.
  • the length of the first time window is based on Determine that the transmission resource is located relative to the starting position of the first FFP
  • the subsequent terminal can detect the PSCCH and then determine whether the first FFP is occupied by sidelink transmission. Otherwise, the terminal cannot determine whether the first FFP is occupied by detecting the PSCCH and can only detect it before the starting position of the first FFP. listen.
  • the starting position of the first time window is the same as the starting position of the first FFP.
  • the configuration of semi-static channel access can be the same as that shown in Figure 13.
  • the window length of the first time window corresponds to two time slots (i.e., time slot n and time slot n+1) , and starting from the starting position of the FFP (that is, the third FFP among the three FFPs shown in Figure 18), the UEs whose selected or reserved transmission resources are located in the first time window include UE1. Therefore, UE1 is in Listening is performed before the starting time of the FFP. If the channel is idle, UE1 initiates channel occupation at the starting position of the FFP, and UE1 can use the transmission resources on the second time slot (time slot n+1) in the FFP. Sidelink transmission, when UE2 detects the sidelink transmission sent by UE1, it can determine that the FFP is available, and then use the selected or reserved sidelink transmission resources in the third time slot (timeslot n+2) in the FFP. Lateral transmission.
  • the first terminal is any terminal. That is, any UE can listen before the starting time of the first FFP; if the listening result is that the channel is idle, the UE can initiate channel occupation at the starting position of the first FFP.
  • the channel sensing performed by the first terminal before the first FFP is performed during the idle time before the first FFP.
  • the idle time before the first FFP may be the idle time within an FFP adjacent to the first FFP and before the first FFP.
  • the first terminal performs channel sensing during the idle time before the first FFP, and the first terminal determines whether sidelink transmission can be performed within the first FFP based on the sensing result. For example, if the listening result is idle, the first terminal determines that sidelink transmission can be performed within the first FFP.
  • the channel sensing performed by the first terminal before the first FFP is performed within the first listening duration before the first FFP.
  • the first terminal performs channel sensing within the first listening duration before the first FFP, and the first terminal determines whether sidelink transmission can be performed within the first FFP based on the sensing result. For example, if the listening result is idle, the first terminal determines that sidelink transmission can be performed within the first FFP.
  • the first listening duration is equal to 9 microseconds or 16 microseconds.
  • the first terminal selects or reserves transmission resources in the first FFP, or if the first terminal is allocated transmission resources by a network device in the first FFP, and the first terminal The starting position of the terminal's transmission resources in the first FFP is located after the starting position of the first FFP. If the time interval between the first sidelink transmission and the previous sidelink transmission is less than or equal to the second duration, the The first terminal directly performs the first sidelink transmission without performing channel sensing; wherein the first sidelink transmission is a sidelink transmission performed by the first terminal on the transmission resources in the first FFP, and the first sidelink transmission is performed on the transmission resource in the first FFP.
  • the sideline transmission preceding a sideline transmission is a sideline transmission performed within the first FFP.
  • the first terminal selects or reserves transmission resources in the first FFP, or if the first terminal is allocated transmission resources by a network device in the first FFP, and the first terminal The starting position of the terminal's transmission resources in the first FFP is located after the starting position of the first FFP.
  • the first The terminal performs channel sensing for the first listening duration; and when the channel sensing result for the first listening duration is idle, the first terminal performs the first sidelink transmission, otherwise, the first terminal ignores Or give up the first sidelink transmission; wherein, the first sidelink transmission is a sidelink transmission performed by the first terminal on the transmission resources selected or reserved in the first FFP, and the preceding sidelink transmission of the first sidelink transmission A sidelink transfer is a sidelink transfer performed within the first FFP.
  • the second duration is determined based on at least one of the following: preconfiguration information, network configuration information, resource pool configuration information, sideline BWP configuration information, and semi-static channel access configuration information.
  • the second duration is equal to 16 ⁇ s.
  • a side-link transmission preceding the first side-link transmission is performed by the first terminal, or a side-link transmission preceding the first side-link transmission is performed by another terminal.
  • the first terminal performs channel listening for a first listening duration, including:
  • the first terminal performs channel listening for the first listening duration within the third duration.
  • the third duration is determined based on at least one of the following: protocol pre-definition information, pre-configuration information, network configuration information, resource pool configuration information, sideline BWP configuration information, and semi-static channel access configuration information.
  • the third duration is equal to 25 microseconds.
  • the first listening duration is less than or equal to the second duration.
  • the first terminal needs to perform sideline transmission according to the current
  • the interval between a sidelink transmission and the previous sidelink transmission determines whether a sidelink transmission is possible. If the interval between the current sidelink transmission and the previous sidelink transmission (the previous sidelink transmission may be the sidelink transmission of the first terminal UE or the sidelink transmission of other terminals) is less than or equal to 16 ⁇ s, then the A terminal may directly perform sideline transmission without listening; and/or, if the interval between the current sideline transmission and the previous sideline transmission is greater than 16 ⁇ s, the first terminal performs listening for the first listening time.
  • the first terminal can perform sideline transmission, otherwise the sideline transmission is discarded; wherein the first listening duration is equal to 9 ⁇ s or 16 ⁇ s; further, the first terminal within the third duration Listening for the first listening duration is performed, and the third duration is equal to 25 ⁇ s.
  • the first listening duration is determined based on one of the following: the listening duration corresponding to Type 2A channel access, the listening duration corresponding to Type 2B channel access, or the listening duration corresponding to Type 2C channel access. Listening duration, the duration corresponding to one listening slot.
  • the first listening duration is agreed upon by a protocol, or the first listening duration is configured by a network device, or the first listening duration is indicated by the second terminal, or the first listening duration
  • the duration is obtained from the resource pool configuration information, or the first listening duration is obtained from the sideline BWP configuration information, or the first listening duration is obtained from the semi-static channel access configuration information .
  • the second terminal is a terminal that performs sidelink transmission at the starting position of the first FFP.
  • the sidelink channel may include: PSCCH, PSSCH, PSFCH, S-SSB, etc.
  • the configuration of semi-static channel access can be the same as that shown in Figure 13.
  • the period of PSFCH is 4 time slots.
  • time slots n and n +4 includes PSFCH transmission resources.
  • UE1 sends PSCCH/PSSCH to UE2 in time slot n+1.
  • UE2 needs to send PSFCH to UE1 in time slot n+4. Since the transmission resource of UE2's PSFCH is not located at the starting position of FFP, Therefore, UE2 needs to listen before the FFP starting position and initiate channel occupation when the channel is idle.
  • the first terminal when the first terminal determines the candidate transmission resource set, if the first transmission resource overlaps with the idle time in the first FFP, the first terminal excludes the first transmission resource set from the candidate transmission resource set. transmission resources;
  • the first transmission resource includes at least one of the following:
  • Transmission resources used to transmit PSCCH transmission resources used to transmit PSSCH.
  • the transmission resource in a time slot that is, the time domain symbols used to transmit PSSCH in the time slot (excluding GP symbols and symbols used to transmit PSFCH)
  • the time domain symbols used to transmit PSSCH are the same as those used to transmit PSSCH, If the idle time within an FFP overlaps, the transmission resource is excluded.
  • the period of FFP is 4ms.
  • one FFP period includes 4 time slots, and the length of the idle time is 200 ⁇ s. Then the corresponding length of the idle time is more than 2, The duration is less than 3 OFDM symbols, that is, the transmission resources in the fourth time slot of FFP overlap with the idle time. Therefore, the transmission resources in the fourth time slot are all unavailable resources.
  • the selection window size is 16 time slots, corresponding to 4 FFP cycles. When determining the candidate transmission resource set, the transmission resources corresponding to the 4th time slot in each FFP cycle in the selection window need to be excluded from the candidate transmission resource set. .
  • FIG. 20 What is shown in Figure 20 is the case where the starting position of the selection window is aligned with the starting position of the FFP cycle. The same applies to the case where the starting position of the selection window is not aligned with the starting position of the FFP cycle, that is, when determining the candidate When transmitting resource aggregation, the transmission resources corresponding to the 4th time slot in each FFP cycle are excluded from the selection window.
  • the first terminal determines the candidate transmission resource set, if the transmission resources of the PSFCH associated with the PSSCH transmitted using the second transmission resource overlap with the idle time in the first FFP, the first terminal The terminal excludes the second transmission resource from the candidate transmission resource set.
  • the first terminal re-selects resources, or the first terminal The PSSCH transmission using the third transmission resource is discarded or ignored.
  • the cycle of PSFCH is 2 time slots. If the first terminal selects the transmission resource in time slot n (the first time slot in the last FFP) for transmitting PSSCH, its corresponding The PSFCH transmission resource is located in time slot n+3 and overlaps with the idle time in the FFP, that is, the PSFCH transmission resource is unavailable. If the PSSCH sent by the first terminal requires sidelink feedback, the receiving end cannot perform sidelink feedback. Therefore, the first terminal excludes the transmission resources in this time slot when determining the candidate resource set, or does not select the transmission resources in this time slot when performing resource selection.
  • the configuration information is used to prevent the transmission resources of the PSFCH from overlapping with the idle time in the FFP cycle, that is, the first terminal does not expect the transmission resources of the PSFCH to overlap with the idle time in the FFP cycle.
  • the first terminal when the first terminal selects a transmission resource from the candidate transmission resource set, the first terminal preferentially selects the transmission resource on the first time slot in the first FFP.
  • the first terminal preferentially selects the transmission resource in the first time slot in the first FFP, so that the first terminal can listen before the starting time of the first FFP. If the channel is idle, the first terminal is used.
  • the transmission resources in the first time slot in the FFP perform sidelink transmission and initiate channel occupation. If terminals in other time slots in the first FFP detect the sidelink transmission of the first terminal, the first FFP is considered to have It is occupied by sidelink transmission, so other terminals can perform corresponding sidelink transmission.
  • the conditions for the first terminal to perform sideline transmission within the first FFP are introduced, thereby ensuring the sideline transmission of the first terminal within the first FFP and optimizing the sideline transmission within the FFP .
  • a terminal with resource selection or reservation in the FFP cycle listens and initiates channel occupation before the FFP start position, so that even if no terminal performs side transmission to initiate channel occupation in the first time slot in the FFP cycle, other terminals in the FFP cycle also use the transmission resources in the FFP cycle for side transmission; in addition, by giving priority to selecting the transmission resources in the first time slot in the FFP cycle, LBT can be used and side transmission can be performed in the time slot to initiate channel occupation.
  • Figure 21 shows a schematic block diagram of a terminal device 300 according to an embodiment of the present application.
  • the terminal device 300 is a first terminal.
  • the terminal device 300 includes: a communication unit 310;
  • the communication unit 310 is configured to perform sideline transmission within the first fixed frame period FFP;
  • the first condition includes at least one of the following:
  • the transmission resources in the FFP have previously detected the channel occupancy time COT shared information of other terminals.
  • the first terminal is the target receiving terminal of the terminal that initiated channel occupancy at the starting position of the first FFP.
  • the first terminal is the target receiving terminal at the starting position of the first FFP.
  • the target receiving terminal of the sidelink transmission of the first terminal includes the terminal that initiates channel occupation at the starting position of the first FFP.
  • the sidelink transmission of the first terminal The target receiving end includes a terminal that sends COT shared information in the first FFP, and the end position of the sideline transmission of the first terminal is located before the start position of the idle time in the first FFP.
  • the first condition is agreed upon by a protocol, or the first condition is determined by preconfiguration information, or the first condition is configured by a network device, or the first condition is based on the indication information of the second terminal. It is determined that the second terminal is a terminal that initiates channel occupation at the starting position of the first FFP, or the second terminal is a terminal that sends COT sharing information within the first FFP.
  • the first terminal performs channel sensing (sensing) before the starting time of the first FFP, and the first terminal determines whether sidelink transmission can be performed within the first FFP according to the sensing result. For example, if the listening result is idle, the first terminal determines that sidelink transmission can be performed within the first FFP.
  • the first terminal performs channel sensing (sensing) before the starting time of the first FFP, including: the first terminal performs channel sensing on an FFP adjacent to the first FFP and located before the first FFP. Perform channel listening during the idle time.
  • the idle time may be part or all of the idle time within the FFP.
  • the starting position of the transmission resource of the first terminal in the first FFP is located behind the starting position of the first FFP.
  • the sideline transmission of other terminals detected by the first terminal includes at least one of the following: physical sidelink shared channel PSSCH, physical sidelink control channel PSCCH, physical sidelink feedback channel PSFCH, sidelink synchronization signal block S-SSB, and sidelink control information SCI.
  • the first condition at least includes that the channel listening result performed by the first terminal before the first FFP is idle, and when the first condition is met, the communication unit 310 is specifically configured to :
  • the duration of the sidelink transmission started by the first terminal at the starting position of the first FFP is determined based on at least one of the following: preconfiguration information, network configuration information, resource pool configuration information, sidelink bandwidth Partial BWP configuration information, semi-static channel access configuration information, the duration corresponding to an orthogonal frequency division multiplexing OFDM symbol, channel access priority information or sidelink priority information; or,
  • the duration of the sidelink transmission performed by the first terminal starting from the starting position of the first FFP is determined based on the duration corresponding to the OFDM symbols available for sidelink transmission in the first time slot in the first FFP; or,
  • the duration of the sidelink transmission performed by the first terminal starting from the starting position of the first FFP is determined based on the duration corresponding to the OFDM symbols available for PSSCH transmission in the first time slot in the first FFP.
  • the first terminal when the duration of the sidelink transmission performed by the first terminal starting at the starting position of the first FFP is determined based on the duration corresponding to one OFDM symbol, the first terminal starts at the starting position of the first FFP.
  • the duration of sidelink transmission starting from the starting position shall not exceed the duration corresponding to one OFDM symbol.
  • the duration of the sidelink transmission started by the first terminal at the starting position of the first FFP is determined based on the following formula:
  • T 1 S ⁇ T 2 ;
  • T 1 represents the duration of the sidelink transmission started by the first terminal at the starting position of the first FFP
  • T 2 represents the duration corresponding to one OFDM symbol, 0 ⁇ S ⁇ 1.
  • the value of S is determined based on resource pool configuration information, or the value of S is determined based on sideline BWP configuration information, or the value of S is determined based on semi-static channel access configuration information, or S The value is determined based on the predefined information of the protocol.
  • the transmission resources corresponding to the sidelink transmission performed by the first terminal starting from the starting position of the first FFP are transmission resources randomly selected in the first time slot in the first FFP, or , the transmission resources corresponding to the sidelink transmission performed by the first terminal starting from the starting position of the first FFP are part or all of the common transmission resources in the first time slot in the first FFP.
  • the size of the common transmission resource is determined based on the frequency domain resource granularity of PSSCH.
  • the common transmission resource corresponds to one or more comb resources
  • the common transmission resource corresponds to one or more sub-channels.
  • the common transmission resource includes a group of frequency domain contiguous PRBs or two groups of frequency domain contiguous PRBs, wherein each group of frequency domain contiguous PRBs includes at least one PRB.
  • one group of frequency domain contiguous PRBs includes the PRB with the lowest index
  • the other group of frequency domain contiguous PRBs includes the PRB with the highest index. PRB.
  • the frequency domain size and/or frequency domain location of the common transmission resource is determined based on at least one of the following:
  • Preconfiguration information network configuration information, resource pool configuration information, sideline BWP configuration information, semi-static channel access configuration information.
  • the transmission resources corresponding to the sidelink transmission started by the first terminal at the starting position of the first FFP are part or all of the common transmission resources in the first time slot in the first FFP.
  • other terminals exclude transmission resources that overlap with the public transmission resource when selecting resources.
  • the channel access priority information may be determined based on preconfiguration information or network configuration information, or based on QoS information, PQI information or sidelink priority of sidelink data.
  • the sidelink priority information may be determined based on preconfiguration information or network configuration information, or based on QoS information, PQI information or sidelink priority of sidelink data.
  • the first terminal is a terminal that selects or reserves transmission resources in the first FFP, or the first terminal is a terminal that is allocated transmission resources by a network device in the first FFP, Alternatively, the first terminal is a terminal that selects or reserves transmission resources within the first time window within the first FFP, or the first terminal is a terminal that is selected by the network within the first time window within the first FFP.
  • the device is allocated a terminal with transmission resources, or the first terminal is any terminal.
  • the position and/or length of the first time window is agreed upon by a protocol, or the position and/or length of the first time window is determined by preconfigured information, or the position and/or length of the first time window are /or the length is determined by network device configuration information.
  • the length of the first time window is determined based on the first duration, wherein the value of the first duration is associated with the size of the subcarrier interval.
  • the first duration is determined by at least one of the following: detection time of PSCCH, detection time of COT shared information, detection time of sidelink synchronization signal, and detection time of PSFCH channel.
  • the starting position of the first time window is the same as the starting position of the first FFP.
  • the channel sensing performed by the first terminal before the first FFP is performed during the idle time before the first FFP, or the channel sensing performed by the first terminal before the first FFP The listening is performed within the first listening duration before the first FFP.
  • the first listening duration is equal to 9 microseconds or 16 microseconds.
  • the terminal device 300 further includes: a processing unit 320;
  • the communication unit 310 is also configured to directly perform the first sidelink transmission without performing channel sensing; and/or ,
  • the processing unit 320 is configured to perform channel sensing for the first listening duration; and perform channel sensing during the first listening duration. If the listening result is idle, the communication unit 310 is also used to perform the first side transmission; otherwise, the processing unit 320 is used to ignore or give up the first side transmission;
  • the first sidelink transmission is a sidelink transmission performed by the first terminal on the transmission resources selected or reserved in the first FFP, and the previous sidelink transmission of the first sidelink transmission is the first FFP A side transfer performed within.
  • a side-link transmission preceding the first side-link transmission is performed by the first terminal, or a side-link transmission preceding the first side-link transmission is performed by another terminal.
  • the processing unit 320 is specifically used to:
  • Channel listening for the first listening duration is performed within the third duration.
  • the third duration is equal to 25 microseconds.
  • the third duration is determined based on at least one of the following: protocol pre-definition information, pre-configuration information, network configuration information, resource pool configuration information, sideline BWP configuration information, and semi-static channel access configuration information.
  • the first listening duration is less than or equal to the second duration.
  • the first listening duration is determined based on one of the following: the listening duration corresponding to Type 2A channel access, the listening duration corresponding to Type 2B channel access, or the listening duration corresponding to Type 2C channel access. Listening duration, the duration corresponding to one listening slot.
  • the first listening duration is agreed upon by a protocol, or the first listening duration is configured by a network device, or the first listening duration is indicated by the second terminal, or the first listening duration
  • the duration is obtained from the resource pool configuration information, or the first listening duration is obtained from the sideline BWP configuration information, or the first listening duration is obtained from the semi-static channel access configuration information .
  • the second terminal is a terminal that performs sidelink transmission at the starting position of the first FFP.
  • the terminal device 300 further includes: a processing unit 320;
  • the processing unit 320 is configured to, when determining the candidate transmission resource set, if the first transmission resource overlaps with the idle time in the first FFP, the first terminal excludes the first transmission resource from the candidate transmission resource set;
  • the first transmission resource includes at least one of the following:
  • Transmission resources used to transmit PSCCH transmission resources used to transmit PSSCH.
  • the terminal device 300 further includes: a processing unit 320;
  • the processing unit 320 is used to exclude the second transmission resource from the candidate transmission resource set.
  • the terminal device 300 further includes: a processing unit 320;
  • the processing unit 320 is used to re-select the resource, or the processing unit 320 is used to discard or PSSCH transmission using the third transmission resource is ignored.
  • the terminal device 300 further includes: a processing unit 320;
  • the processing unit 320 is configured to give priority to selecting the transmission resource on the first time slot in the first FFP when selecting transmission resources from the candidate transmission resource set.
  • the communication unit 310 is further configured to receive first configuration information, where the first configuration information is used to indicate a semi-static channel access method, or the first configuration information is used to indicate the use of a semi-static channel. Access mode for channel access.
  • the terminal device 300 further includes: a processing unit 320;
  • the communication unit 310 is also configured to receive second configuration information, where the second configuration information includes semi-static channel access configuration parameters;
  • the processing unit 320 is configured to determine at least one of the following information according to the second configuration information: period information of the FFP, a starting position of the FFP, the length of the idle time in the FFP, and the maximum channel occupation duration in the FFP.
  • the above-mentioned communication unit may be a communication interface or transceiver, or an input/output interface of a communication chip or a system on a chip.
  • the above-mentioned processing unit may be one or more processors.
  • terminal device 300 may correspond to the first terminal in the method embodiment of the present application, and the above and other operations and/or functions of each unit in the terminal device 300 are respectively intended to implement what is shown in Figure 15
  • the corresponding process of the first terminal in method 200 will not be described again for the sake of simplicity.
  • Figure 22 is a schematic structural diagram of a communication device 400 provided by an embodiment of the present application.
  • the communication device 400 shown in Figure 22 includes a processor 410.
  • the processor 410 can call and run a computer program from the memory to implement the method in the embodiment of the present application.
  • communication device 400 may also include memory 420.
  • the processor 410 can call and run the computer program from the memory 420 to implement the method in the embodiment of the present application.
  • the memory 420 may be a separate device independent of the processor 410, or may be integrated into the processor 410.
  • the communication device 400 may also include a transceiver 430, and the processor 410 may control the transceiver 430 to communicate with other devices, specifically, may send information or data to other devices, or Receive information or data from other devices.
  • the transceiver 430 may include a transmitter and a receiver.
  • the transceiver 430 may further include an antenna, and the number of antennas may be one or more.
  • the processor 410 can implement the functions of a processing unit in the terminal device, which will not be described again for the sake of brevity.
  • the transceiver 430 can implement the function of the communication unit in the terminal device, which will not be described again for the sake of brevity.
  • the communication device 400 can be a terminal device according to the embodiment of the present application, and the communication device 400 can implement the corresponding processes implemented by the first terminal in the various methods of the embodiment of the present application. For the sake of brevity, here No longer.
  • Figure 23 is a schematic structural diagram of the device according to the embodiment of the present application.
  • the device 500 shown in Figure 23 includes a processor 510.
  • the processor 510 can call and run a computer program from the memory to implement the method in the embodiment of the present application.
  • device 500 may also include memory 520.
  • the processor 510 can call and run the computer program from the memory 520 to implement the method in the embodiment of the present application.
  • the memory 520 may be a separate device independent of the processor 510 , or may be integrated into the processor 510 .
  • the device 500 may also include an input interface 530.
  • the processor 510 can control the input interface 530 to communicate with other devices or chips. Specifically, it can obtain information or data sent by other devices or chips.
  • processor 510 may be located on-chip or off-chip.
  • the processor 510 can implement the functions of a processing unit in the terminal device, which will not be described again for the sake of simplicity.
  • the input interface 530 may implement the function of a communication unit in the terminal device.
  • the device 500 may also include an output interface 540.
  • the processor 510 can control the output interface 540 to communicate with other devices or chips. Specifically, it can output information or data to other devices or chips.
  • processor 510 may be located on-chip or off-chip.
  • the output interface 540 may implement the function of a communication unit in the terminal device.
  • the device can be applied to the terminal equipment in the embodiments of the present application, and the device can implement the corresponding processes implemented by the first terminal in the various methods of the embodiments of the present application. For the sake of brevity, they will not be described again. .
  • the devices mentioned in the embodiments of this application may also be chips.
  • it can be a system-on-a-chip, a system-on-a-chip, a system-on-a-chip or a system-on-a-chip, etc.
  • Figure 24 is a schematic block diagram of a communication system 600 provided by an embodiment of the present application. As shown in FIG. 24, the communication system 600 includes a first terminal 610 and a second terminal 620.
  • the first terminal 610 can be used to implement the corresponding functions implemented by the first terminal in the above method
  • the second terminal 620 can be used to implement the corresponding functions implemented by the second terminal in the above method.
  • I won’t go into details here.
  • the processor in the embodiment of the present application may be an integrated circuit chip and has signal processing capabilities.
  • each step of the above method embodiment can be completed through an integrated logic circuit of hardware in the processor or instructions in the form of software.
  • the above-mentioned processor can be a general-purpose processor, a digital signal processor (Digital Signal Processor, DSP), an application specific integrated circuit (Application Specific Integrated Circuit, ASIC), an off-the-shelf programmable gate array (Field Programmable Gate Array, FPGA) or other available Programmed logic devices, discrete gate or transistor logic devices, discrete hardware components.
  • DSP Digital Signal Processor
  • ASIC Application Specific Integrated Circuit
  • FPGA Field Programmable Gate Array
  • a general-purpose processor may be a microprocessor or the processor may be any conventional processor, etc.
  • the steps of the method disclosed in conjunction with the embodiments of the present application can be directly implemented by a hardware decoding processor, or executed by a combination of hardware and software modules in the decoding processor.
  • the software module can be located in random access memory, flash memory, read-only memory, programmable read-only memory or electrically erasable programmable memory, registers and other mature storage media in this field.
  • the storage medium is located in the memory, and the processor reads the information in the memory and completes the steps of the above method in combination with its hardware.
  • non-volatile memory can be read-only memory (Read-Only Memory, ROM), programmable read-only memory (Programmable ROM, PROM), erasable programmable read-only memory (Erasable PROM, EPROM), electrically removable memory. Erase programmable read-only memory (Electrically EPROM, EEPROM) or flash memory. Volatile memory may be Random Access Memory (RAM), which is used as an external cache.
  • RAM Random Access Memory
  • RAM static random access memory
  • DRAM dynamic random access memory
  • DRAM synchronous dynamic random access memory
  • SDRAM double data rate synchronous dynamic random access memory
  • Double Data Rate SDRAM DDR SDRAM
  • enhanced SDRAM ESDRAM
  • Synchlink DRAM SLDRAM
  • Direct Rambus RAM Direct Rambus RAM
  • the memory in the embodiment of the present application can also be a static random access memory (static RAM, SRAM), a dynamic random access memory (dynamic RAM, DRAM), Synchronous dynamic random access memory (synchronous DRAM, SDRAM), double data rate synchronous dynamic random access memory (double data rate SDRAM, DDR SDRAM), enhanced synchronous dynamic random access memory (enhanced SDRAM, ESDRAM), synchronous connection Dynamic random access memory (synch link DRAM, SLDRAM) and direct memory bus random access memory (Direct Rambus RAM, DR RAM) and so on. That is, memories in embodiments of the present application are intended to include, but are not limited to, these and any other suitable types of memories.
  • Embodiments of the present application also provide a computer-readable storage medium for storing computer programs.
  • the computer-readable storage medium can be applied to the terminal device in the embodiment of the present application, and the computer program causes the computer to execute the corresponding processes implemented by the first terminal in the various methods of the embodiment of the present application. For the sake of simplicity , which will not be described in detail here.
  • An embodiment of the present application also provides a computer program product, including computer program instructions.
  • the computer program product can be applied to the terminal device in the embodiments of the present application, and the computer program instructions cause the computer to execute the corresponding processes implemented by the first terminal in the various methods of the embodiments of the present application. For the sake of simplicity, I won’t go into details here.
  • An embodiment of the present application also provides a computer program.
  • the computer program can be applied to the terminal device in the embodiments of the present application.
  • the computer program When the computer program is run on the computer, it causes the computer to execute the corresponding processes implemented by the first terminal in each method of the embodiments of the present application. , for the sake of brevity, will not be repeated here.
  • the disclosed systems, devices and methods can be implemented in other ways.
  • the device embodiments described above are only illustrative.
  • the division of the units is only a logical function division. In actual implementation, there may be other division methods.
  • multiple units or components may be combined or can be integrated into another system, or some features can be ignored, or not implemented.
  • the coupling or direct coupling or communication connection between each other shown or discussed may be through some interfaces, and the indirect coupling or communication connection of the devices or units may be in 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 they may be distributed to multiple network units. Some or all of the units can 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 can be integrated into one processing unit, each unit can exist physically alone, or two or more units can be integrated into one unit.
  • the functions described are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium.
  • the technical solution of the present application is essentially or the part that contributes to the existing technology or the part of the technical solution can be embodied in the form of a software product.
  • the computer software product is stored in a storage medium, including Several instructions are used to cause a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in various embodiments of this application.
  • the aforementioned storage media include: U disk, mobile hard disk, read-only memory (ROM), random access memory (Random Access Memory, RAM), magnetic disk or optical disk and other media that can store program code. .

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Abstract

本申请实施例提供了一种无线通信的方法及设备，引入了第一终端在第一FFP内进行侧行传输的条件，从而可以确保第一终端在第一FFP内的侧行传输，优化了FFP内的侧行传输。

Description

无线通信的方法及设备 技术领域
本申请实施例涉及通信领域，并且更具体地，涉及一种无线通信的方法及设备。
背景技术
侧行链路的非授权频谱接入(sidelink-based access to Unlicensed spectrum，SL-U)系统支持半静态信道接入，然而，在SL-U系统中基于终端自主选取资源的资源分配方式中，无法保证在固定帧周期(Fixed Frame Period，FFP)的起始位置有用户进行侧行传输，可能会影响FFP内的侧行传输。
发明内容
本申请实施例提供了一种无线通信的方法及设备，引入了第一终端在第一FFP内进行侧行传输的条件，从而可以确保第一终端在第一FFP内的侧行传输，优化了FFP内的侧行传输。
第一方面，提供了一种无线通信的方法，该方法包括：
在满足第一条件的情况下，第一终端在第一FFP内进行侧行传输；
其中，该第一条件包括以下至少之一：
该第一终端在该第一FFP之前执行的信道侦听结果为空闲，该第一终端在该第一FFP内的传输资源之前检测到了其他终端的侧行传输，该第一终端在该第一FFP内的传输资源之前检测到了其他终端的COT共享信息，该第一终端为在该第一FFP的起始位置发起信道占用的终端的目标接收终端，该第一终端为在该第一FFP内发送COT共享信息的终端的目标接收终端，该第一终端的侧行传输的目标接收端包括在该第一FFP的起始位置发起信道占用的终端，该第一终端的侧行传输的目标接收端包括在该第一FFP内发送COT共享信息的终端，该第一终端的侧行传输的结束位置位于该第一FFP内的空闲时间的起始位置之前。
第二方面，提供了一种终端设备，用于执行上述第一方面中的方法。
具体地，该终端设备包括用于执行上述第一方面中的方法的功能模块。
第三方面，提供了一种终端设备，包括处理器和存储器；该存储器用于存储计算机程序，该处理器用于调用并运行该存储器中存储的计算机程序，使得该终端设备执行上述第一方面中的方法。
第四方面，提供了一种装置，用于实现上述第一方面中的方法。
具体地，该装置包括：处理器，用于从存储器中调用并运行计算机程序，使得安装有该装置的设备执行如上述第一方面中的方法。
第五方面，提供了一种计算机可读存储介质，用于存储计算机程序，该计算机程序使得计算机执行上述第一方面中的方法。
第六方面，提供了一种计算机程序产品，包括计算机程序指令，所述计算机程序指令使得计算机执行上述第一方面中的方法。
第七方面，提供了一种计算机程序，当其在计算机上运行时，使得计算机执行上述第一方面中的方法。
通过上述技术方案，引入了第一终端在第一FFP内进行侧行传输的条件，从而可以确保第一终端在第一FFP内的侧行传输，优化了FFP内的侧行传输。
附图说明
图1是本申请提供的一种通信系统架构的示意性图。
图2是本申请提供的另一种通信系统架构的示意性图。
图3是本申请提供的一种网络覆盖范围内侧行通信的示意性图。
图4是本申请提供的一种部分网络覆盖侧行通信的示意性图。
图5是本申请提供的一种网络覆盖外侧行通信的示意性图。
图6是本申请提供的一种存在中央控制节点的侧行通信的示意性图。
图7是本申请提供的一种单播侧行通信的示意性图。
图8是本申请提供的一种组播侧行通信的示意性图。
图9是本申请提供的一种广播侧行通信的示意性图。
图10是本申请提供的一种NR-V2X中的时隙结构的示意性图。
图11是本申请提供的一种系统带宽的示意性图。
图12是本申请提供的一种非授权频谱上配置的资源池的示意性图。
图13是本申请提供的一种固定帧周期的示意性图。
图14是本申请提供的一种固定帧周期内第一个时隙中无侧行传输的示意性图。
图15是根据本申请实施例提供的一种无线通信的方法的示意性流程图。
图16是根据本申请实施例提供的一种FFP的起始位置进行侧行传输的示意图。
图17是根据本申请实施例提供的一种公共传输资源的示意图。
图18是根据本申请实施例提供的一种第一时间窗的示意图。
图19是根据本申请实施例提供的一种在FFP的起始位置之前进行信道侦听的示意图。
图20是根据本申请实施例提供的一种确定候选传输资源集合的示意性图。
图21是根据本申请实施例提供的一种终端设备的示意性框图。
图22是根据本申请实施例提供的一种通信设备的示意性框图。
图23是根据本申请实施例提供的一种装置的示意性框图。
图24是根据本申请实施例提供的一种通信系统的示意性框图。
具体实施方式
下面将结合本申请实施例中的附图，对本申请实施例中的技术方案进行描述，显然，所描述的实施例是本申请一部分实施例，而不是全部的实施例。针对本申请中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本申请保护的范围。
本申请实施例的技术方案可以应用于各种通信系统，例如：全球移动通讯(Global System of Mobile communication，GSM)系统、码分多址(Code Division Multiple Access，CDMA)系统、宽带码分多址(Wideband Code Division Multiple Access，WCDMA)系统、通用分组无线业务(General Packet Radio Service，GPRS)、长期演进(Long Term Evolution，LTE)系统、先进的长期演进(Advanced long term evolution，LTE-A)系统、新空口(New Radio，NR)系统、NR系统的演进系统、非授权频谱上的LTE(LTE-based access to unlicensed spectrum，LTE-U)系统、非授权频谱上的NR(NR-based access to unlicensed spectrum，NR-U)系统、非地面通信网络(Non-Terrestrial Networks，NTN)系统、通用移动通信系统(Universal Mobile Telecommunication System，UMTS)、无线局域网(Wireless Local Area Networks，WLAN)、无线保真(Wireless Fidelity，WiFi)、第五代通信(5th-Generation，5G)系统或其他通信系统等。
通常来说，传统的通信系统支持的连接数有限，也易于实现，然而，随着通信技术的发展，移动通信系统将不仅支持传统的通信，还将支持例如，设备到设备(Device to Device，D2D)通信，机器到机器(Machine to Machine，M2M)通信，机器类型通信(Machine Type Communication，MTC)，车辆间(Vehicle to Vehicle，V2V)通信，或车联网(Vehicle to everything，V2X)通信等，本申请实施例也可以应用于这些通信系统。
可选地，本申请实施例中的通信系统可以应用于载波聚合(Carrier Aggregation，CA)场景，也可以应用于双连接(Dual Connectivity，DC)场景，还可以应用于独立(Standalone，SA)布网场景。
可选地，本申请实施例中的通信系统可以应用于非授权频谱，其中，非授权频谱也可以认为是共享频谱；或者，本申请实施例中的通信系统也可以应用于授权频谱，其中，授权频谱也可以认为是非共享频谱。
本申请实施例结合网络设备和终端设备描述了各个实施例，其中，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、远方站、远程终端、移动设备、用户终端、终端、无线通信设备、用户代理或用户装置等。
终端设备可以是WLAN中的站点(STATION，ST)，可以是蜂窝电话、无绳电话、会话启动协议(Session Initiation Protocol，SIP)电话、无线本地环路(Wireless Local Loop，WLL)站、个人数字助理(Personal Digital Assistant，PDA)设备、具有无线通信功能的手持设备、计算设备或连接到无线调制解调器的其它处理设备、车载设备、可穿戴设备、下一代通信系统例如NR网络中的终端设备，或者未来演进的公共陆地移动网络(Public Land Mobile Network，PLMN)网络中的终端设备等。
在本申请实施例中，终端设备可以部署在陆地上，包括室内或室外、手持、穿戴或车载；也可以部署在水面上(如轮船等)；还可以部署在空中(例如飞机、气球和卫星上等)。
在本申请实施例中，终端设备可以是手机(Mobile Phone)、平板电脑(Pad)、带无线收发功能的电脑、虚拟现实(Virtual Reality，VR)终端设备、增强现实(Augmented Reality，AR)终端设备、工业控制(industrial control)中的无线终端设备、无人驾驶(self driving)中的无线终端设备、远程医疗(remote medical)中的无线终端设备、智能电网(smart grid)中的无线终端设备、运输安全(transportation safety)中的无线终端设备、智慧城市(smart city)中的无线终端设备或智慧家庭(smart home)中的无线终端设备等。
作为示例而非限定，在本申请实施例中，该终端设备还可以是可穿戴设备。可穿戴设备也可以称 为穿戴式智能设备，是应用穿戴式技术对日常穿戴进行智能化设计、开发出可以穿戴的设备的总称，如眼镜、手套、手表、服饰及鞋等。可穿戴设备即直接穿在身上，或是整合到用户的衣服或配件的一种便携式设备。可穿戴设备不仅仅是一种硬件设备，更是通过软件支持以及数据交互、云端交互来实现强大的功能。广义穿戴式智能设备包括功能全、尺寸大、可不依赖智能手机实现完整或者部分的功能，例如：智能手表或智能眼镜等，以及只专注于某一类应用功能，需要和其它设备如智能手机配合使用，如各类进行体征监测的智能手环、智能首饰等。
在本申请实施例中，网络设备可以是用于与移动设备通信的设备，网络设备可以是WLAN中的接入点(Access Point，AP)，GSM或CDMA中的基站(Base Transceiver Station，BTS)，也可以是WCDMA中的基站(NodeB，NB)，还可以是LTE中的演进型基站(Evolutional Node B，eNB或eNodeB)，或者中继站或接入点，或者车载设备、可穿戴设备以及NR网络中的网络设备或者基站(gNB)或者未来演进的PLMN网络中的网络设备或者NTN网络中的网络设备等。
作为示例而非限定，在本申请实施例中，网络设备可以具有移动特性，例如网络设备可以为移动的设备。可选地，网络设备可以为卫星、气球站。例如，卫星可以为低地球轨道(low earth orbit，LEO)卫星、中地球轨道(medium earth orbit，MEO)卫星、地球同步轨道(geostationary earth orbit，GEO)卫星、高椭圆轨道(High Elliptical Orbit，HEO)卫星等。可选地，网络设备还可以为设置在陆地、水域等位置的基站。
在本申请实施例中，网络设备可以为小区提供服务，终端设备通过该小区使用的传输资源(例如，频域资源，或者说，频谱资源)与网络设备进行通信，该小区可以是网络设备(例如基站)对应的小区，小区可以属于宏基站，也可以属于小小区(Small cell)对应的基站，这里的小小区可以包括：城市小区(Metro cell)、微小区(Micro cell)、微微小区(Pico cell)、毫微微小区(Femto cell)等，这些小小区具有覆盖范围小、发射功率低的特点，适用于提供高速率的数据传输服务。
应理解，本文中术语“系统”和“网络”在本文中常被可互换使用。本文中术语“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。
本申请的实施方式部分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”、“第四”、“第A”、“第B”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。
应理解，在本申请的实施例中提到的“指示”可以是直接指示，也可以是间接指示，还可以是表示具有关联关系。举例说明，A指示B，可以表示A直接指示B，例如B可以通过A获取；也可以表示A间接指示B，例如A指示C，B可以通过C获取；还可以表示A和B之间具有关联关系。
在本申请实施例的描述中，术语“对应”可表示两者之间具有直接对应或间接对应的关系，也可以表示两者之间具有关联关系，也可以是指示与被指示、配置与被配置等关系。
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。
为便于理解本申请实施例的技术方案，以下通过具体实施例详述本申请的技术方案。以下相关技术作为可选方案与本申请实施例的技术方案可以进行任意结合，其均属于本申请实施例的保护范围。本申请实施例包括以下内容中的至少部分内容。
图1是本申请实施例适用的一种通信系统的示意图。车载终端(车载终端121和车载终端122)的传输资源是由基站110分配的，车载终端根据基站110分配的资源在侧行链路上进行数据的发送。具体地，基站110可以为终端分配单次传输的资源，也可以为终端分配半静态传输的资源。
图2是本申请实施例适用的另一种通信系统的示意图。车载终端(车载终端131和车载终端132)在侧行链路的资源上自主选取传输资源进行数据传输。可选地，车载终端可以随机选取传输资源，或者通过侦听的方式选取传输资源。
在侧行通信中，根据进行通信的终端所处的网络覆盖情况，可以分为网络覆盖内侧行通信，如图3所示；部分网络覆盖侧行通信，如图4所示；及网络覆盖外侧行通信，如图5所示。
图3：在网络覆盖内侧行通信中，所有进行侧行通信的终端均处于基站的覆盖范围内，从而，上述终端均可以通过接收基站的配置信令，基于相同的侧行配置进行侧行通信。
图4：在部分网络覆盖侧行通信情况下，部分进行侧行通信的终端位于基站的覆盖范围内，这部分终端能够接收到基站的配置信令，而且根据基站的配置进行侧行通信。而位于网络覆盖范围外的终端，无法接收基站的配置信令，在这种情况下，网络覆盖范围外的终端将根据预配置(pre-configuration)信息及位于网络覆盖范围内的终端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，进行侧行通信。
图5：对于网络覆盖外侧行通信，所有进行侧行通信的终端均位于网络覆盖范围外，所有终端均根据预配置(pre-configuration)信息确定侧行配置进行侧行通信。
图6：对于有中央控制节点的侧行通信，多个终端构成一个通信组，该通信组内具有中央控制节点，又可以称为组头终端(Cluster Header，CH)，该中央控制节点具有以下功能之一：负责通信组的建立；组成员的加入、离开；进行资源协调，为其他终端分配侧行传输资源，接收其他终端的侧行反馈信息；与其他通信组进行资源协调等功能。
需要说明的是，设备到设备通信是基于终端到终端(Device to Device，D2D)的一种侧行链路(Sidelink，SL)传输技术，与传统的蜂窝系统中通信数据通过基站接收或者发送的方式不同，因此具有更高的频谱效率以及更低的传输时延，车联网系统采用终端到终端直接通信的方式。在3GPP定义了两种传输模式，分别记为：第一模式(sidelink resource allocation mode 1)和第二模式(sidelink resource allocation mode 2)。
第一模式：终端的传输资源是由基站分配的，终端根据基站分配的资源在侧行链路上进行数据的发送；基站可以为终端分配单次传输的资源，也可以为终端分配半静态传输的资源。如图3所示，终端位于网络覆盖范围内，网络为终端分配侧行传输使用的传输资源。
第二模式：终端在资源池中选取一个资源进行数据的传输。如图5所示，终端位于小区覆盖范围外，终端在预配置的资源池中自主选取传输资源进行侧行传输；或者，如图3所示，终端在网络配置的资源池中自主选取传输资源进行侧行传输。
在新空口-车辆到其他设备(New Radio-Vehicle to Everything，NR-V2X)中，支持自动驾驶，因此对车辆之间数据交互提出了更高的要求，如更高的吞吐量、更低的时延、更高的可靠性、更大的覆盖范围、更灵活的资源分配等。
在NR-V2X中，支持单播、组播和广播的传输方式。对于单播传输，其接收端终端只有一个终端，如图7所示，UE1、UE2之间进行单播传输；对于组播传输，其接收端是一个通信组内的所有终端，或者是在一定传输距离内的所有终端，如图8所示，UE1、UE2、UE3和UE4构成一个通信组，其中UE1发送数据，该组内的其他终端设备都是接收端终端；对于广播传输方式，其接收端是发送端终端周围的任意一个终端，如图9所示，UE1是发送端终端，其周围的其他终端，UE2-UE6都是接收端终端。
为便于更好的理解本申请实施例，以下对本申请相关的NR-V2X系统帧结构进行说明。
NR-V2X中的时隙结构图10所示，图10中的(a)表示时隙中不包括物理侧行反馈信道(Physical Sidelink Feedback Channel，PSFCH)的时隙结构；图10中的图(b)表示包括PSFCH的时隙结构。
NR-V2X中物理侧行控制信道(Physical Sidelink Control Channel，PSCCH)在时域上从该时隙的第二个侧行符号开始，占用2个或3个正交频分复用(Orthogonal frequency-division multiplexing，OFDM)符号，在频域上可以占用{10,12 15,20,25}个物理资源块(physical resource block，PRB)。为了降低UE对PSCCH的盲检测的复杂度，在一个资源池内只允许配置一个PSCCH符号的数量和PRB的数量。另外，因为子信道为NR-V2X中物理侧行共享信道(Physical Sidelink Shared Channel，PSSCH)资源分配的最小粒度，PSCCH占用的PRB的数量必须小于或等于资源池内一个子信道中包含的PRB的数量，以免对PSSCH资源选择或分配造成额外的限制。PSSCH在时域上也是从该时隙的第二个侧行符号开始，该时隙中的最后一个时域符号为保护间隔(Guard Period，GP)符号，其余符号映射PSSCH。该时隙中的第一个侧行符号是第二个侧行符号的重复，通常接收端终端将第一个侧行符号用作自动增益控制(Automatic gain control，AGC)符号，该符号上的数据通常不用于数据解调。PSSCH在频域上占据A个子信道，每个子信道包括B个连续的PRB，A、B为正整数。如图10中的(a)所示。
当时隙中包含PSFCH信道时，该时隙中倒数第二个符号和倒数第三个符号用作PSFCH信道传输，并且倒数第三个符号上的数据是倒数第二个符号上数据的重复，在PSFCH信道之前的一个时域符号用作GP符号，如图10中的(b)所示。
为便于更好的理解本申请实施例，以下对本申请相关的非授权频谱进行说明。
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，即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。非授权频谱也可以称为共享频谱、免授权频谱、免许可频谱、非授权频段、免许可频段或免授权频段等。
为了让使用非授权频谱进行无线通信的各个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必须满足的法规要求。例如，通信设备遵循“先听后说(Listen Before Talk，LBT)”原则，即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，只有当信道侦听结果为信道空闲时，该通信设备才能进行信号发送；如果通信设备在非授权频谱的信道上的信道侦听结果为信道忙，该通信设备不能进行信号发送。为了保证公平性，在一次传输中，通信设备使用非授权频谱的信道进行信号传输的时长不能超过最大信道占用时间(Maximum Channel Occupancy Time，MCOT)。
为便于更好的理解本申请实施例，以下对本申请相关的基于NR的非授权频谱接入(NR-based access to Unlicensed spectrum，NR-U)进行说明。
在非授权频段上进行通信通常需要满足相应的法规需求，例如，如果终端要使用非授权频段进行通信，终端占用的频带范围需要大于或等于系统带宽的80％。因此，为了尽可能的在相同的时间内能够让更多的用户接入信道，在NR-U中定义了基于梳齿(interlace)的资源配置方式。一个梳齿资源包括频域离散的N个物理资源块(physical resource block，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11所示：系统带宽包括30个资源块(resource block，RB)，包括5个梳齿(即M＝5)，每个梳齿包括6个PRB(即N＝6)，一个梳齿中相邻两个PRB的频域间隔相同，即相距5个PRB。需要说明的是，一个梳齿中包括的PRB又可称为梳齿资源块(Interlaced Resource Block，IRB)，梳齿又可称为IRB。
为便于更好的理解本申请实施例，以下对本申请相关的资源块集合(Resource Block Set，RB set)进行说明。
图12是本申请实施例提供的非授权频谱上配置的资源池的示例。
在侧行链路的非授权频谱接入(sidelink-based access to Unlicensed spectrum，SL-U)系统，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。在一些实施方式中，该资源池包括M1个资源块集合，其中，一个资源块集合包括M2个资源块(Resource Block，RB)，M1和M2是正整数。在一些实施方式中，一个资源块集合对应非授权频谱(或共享频谱)中的一个信道(channel)，或者一个资源块集合对应进行LBT的最小频域粒度，或者一个资源块集合对应LBT子带。
例如，一个非授权频谱上的信道对应的带宽为20M Hz，即一个资源块集合对应的带宽也是20M Hz。或者，一个非授权频谱上的信道的带宽为20M Hz，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，如M3＝100(对应于15kHz子载波间隔)，则一个RB set也对应于100个RB，即M2＝100。
又例如，在非授权频谱上需要通过LBT的结果判断是否可以使用非授权频谱，进行LBT的最小频域粒度为20M Hz，则一个RB set对应于20MHz包括的RB数。或者一个RB set包括M2＝100个RB(对应于15kHz子载波间隔)，LBT的最小频域粒度为一个RB set，即100个RB。
需要说明的是，在本申请实施例中，所述资源块集合又可称为信道或LBT子带，本申请实施例对此不做限定。
在一些实施方式中，该资源池的频域起始位置和所述M1个资源块集合中的第一资源块集合的频域起始位置相同，其中，所述第一资源块集合是所述M1个资源块集合中频域位置最低的资源块集合。
在一些实施方式中，该资源池的频域结束位置和所述M1个资源块集合中的第二资源块集合的频域结束位置相同，其中，所述第二资源块集合是所述M1个资源块集合中频域位置最高的资源块集合。
例如，所述资源池包括M1＝3个资源块集合，对应的资源块集合的索引分别为资源块集合0、资源块集合1和资源块集合2，其中，资源块集合0的频域位置最低，资源块集合2的频域位置最高，因此，该资源池的频域起始位置和资源块集合0的频域起始位置相同，或该资源池的频域起始位置根据资源块集合0的频域起始位置确定；该资源池的频域结束位置和资源块集合2的频域结束位置相同，或该资源池的频域结束位置根据资源块集合2的频域结束位置确定。
在一些实施方式中，该资源池包括的M1个资源块集合中的相邻两个资源块集合中间包括保护频段(Guard Band，GB)，保护频段又可称为保护频带。
在一些实施方式中，根据预配置信息或网络配置信息确定所述保护频段的频域起始位置和频域大小。终端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段。在一些实施方式中，保护频段用于分隔资源块集合RB set。
例如可以参照图12进行理解，如图12所示：在侧行带宽部分(Band Width Part，BWP)内配置 了3个保护频段，分别对应保护频段0、保护频段1和保护频段2，这3个保护频段分隔了4个资源块集合，根据侧行BWP的频域起始位置(即图中所示的侧行BWP的起点)以及每个保护频段的频域起始位置(即图中所示的保护频段的起点)和保护频段的频域大小(即图中所示的保护频段的长度)，即可确定每个资源块集合的频域起始位置和结束位置。在该侧行BWP内配置了一个侧行资源池，该侧行资源池包括3个资源块集合，即资源块集合0至资源块集合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)对应于资源块集合0的频域起始位置，资源池的频域结束位置(即图中所示的资源池的终点)对应于资源块集合2的频域结束位置。
在一些实施方式中，一个资源块集合中包括多个梳齿。例如，在图12中的每个资源块集合中都可以包括多个梳齿。
在一些实施方式中，一个PSSCH可以在一个或多个资源块集合中发送。在又一些实施方式中，一个PSSCH可以在一个或多个资源块集合中发送，并且该PSSCH占据该一个或多个资源块集合中的一个或多个梳齿。
为便于更好的理解本申请实施例，以下对本申请相关的信道接入进行说明。
NR-U系统中支持两种信道监听方式：一种是基于负载的设备(Load based equipment，LBE)的LBT，也称为动态信道监听或动态信道占用，另一种是基于帧结构的设备(Frame based equipment，FBE)的LBT，也称为半静态信道监听或半静态信道占用。
动态信道监听
动态信道监听也可以认为是基于LBE的LBT方式，其信道监听原则是通信设备在业务到达后进行非授权频谱的载波上的LBT，并在LBT成功后在该载波上开始信号的发送。动态信道监听的LBT方式包括类型1(Type1)信道接入方式和类型2(Type2)信道接入方式。通信设备在使用非授权频谱时需要遵循先听后说(Listen before talk，LBT)的原则，即对一段时间的信道进行监听，若监听结果为信道空闲，则通信设备可以接入信道进行传输。在NR-U的标准化进程中，已经设计了基站和终端进行LBT的流程与规则。NR-U中的LBT方式主要包括类型1(Type1)信道接入方式和类型2(Type2)信道接入方式。在本申请实施例中，信道接入方式又称为LBT方式。
Type1的信道接入：基于竞争窗口大小调整的随机回退的多时隙的信道检测，根据信道接入优先级p，可以发起长度为T mcot的信道占用，基站使用Type1的LBT方式，除了发送自己的数据，还可以将信道占用时间(Channel Occupancy Time，COT)共享给UE，UE使用Type1的LBT方式，除了发送自己的数据，还可以将COT共享给基站。具体例如，下表1给出了终端进行Type1 LBT时的信道接入优先级及其对应的参数。
表1
信道接入优先级(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或10ms {15,31,63,127,255,511,1023}
需要说明的是，在上述表1中，m p是指信道接入优先级p对应的回退时隙个数，CW p是指信道接入优先级p对应的竞争窗口大小，CW min,p是指信道接入优先级p对应的CW p取值的最小值，CW max,p是指信道接入优先级p对应的CW p取值的最大值，T mcot,p是指信道接入优先级p对应的信道最大占用时间长度。NR-U中的Type1的4种信道接入优先级，p＝1为最高优先级。
Type2是基于固定长度的信道监听时隙的信道接入方式。
Type2A信道接入：UE的信道检测方式为25微秒(μs)的信道检测。具体地，Type2A信道接入下，UE在传输开始前可以进行25μs的信道监听，并在信道监听成功后(即信道空闲)进行传输。
Type2B信道接入：UE的信道检测方式为16μs的信道检测。具体地，Type2B信道接入下，UE在传输开始前可以进行16μs的信道监听，并在信道监听成功后(即信道空闲)进行传输。其中，该传输的起始位置距离上一次传输的结束位置之间的空隙大小为16μs，或者，该传输的起始位置距离上一次传输的结束位置之间的空隙大小为大于或等于16μs并且小于25μs。
Type2C信道接入：UE在空隙结束后不做信道检测而进行传输。具体地，Type2C信道接入下，UE可以直接进行传输。其中，该传输的起始位置距离上一次传输的结束位置之间的空隙大小为小于或等于16μs并且该传输的长度不超过584μs。
半静态信道监听
在NR-U系统中，除了支持LBE的信道接入机制，还支持FBE的信道接入机制。FBE的信道接入机制可以增加频率复用，但在网络部署时对干扰环境和同步要求较高。因此，FBE模式通常应用到周围环境中没有LBE模式共享非授权频谱的通信系统中。
在FBE的信道接入机制，或者说，半静态信道接入模式中，帧结构是周期出现的，即通信设备可以用于业务发送的信道资源是周期性出现的。在一个帧结构内包括固定帧周期(Fixed Frame Period，FFP)、信道占用时间(channel occupancy time，COT)、空闲时间(idle duration)。其中，固定帧周期的长度可以被配置的范围为1到10ms，固定帧周期(FFP)中COT的长度不超过FFP长度的95％，空闲时间的长度至少为FFP长度的5％且空闲时间的最小值为100μs，且空闲时间位于固定帧周期的尾部。
通信设备在空闲时间内对信道做基于固定长度的监听时隙的信道侦听，如果信道空闲，下一个固定帧周期内的COT可以用于传输信号；否则，下一个固定帧周期内的COT不能用于传输信号。在NR-U中，该固定长度的监听时隙对应的时长为9μs或16μs。
半静态信道接入模式可以是基站通过系统信息配置的或通过高层参数配置的。如果一个服务小区被基站配置为半静态信道接入模式，那么该服务小区的固定帧周期的FFP长度为T x，该服务小区的固定帧周期中包括的最大COT长度为T y，该服务小区的FFP中包括的空闲时间的长度为T z。其中，基站可以配置的固定帧周期FFP的长度T x为1ms，2ms，2.5ms，4ms，5ms，或10ms。UE可以根据被配置的T x长度确定T y和T z。具体地，从编号为偶数的无线帧开始，在每两个连续的无线帧内，UE可以根据x×T x确定每个FFP的起始位置，其中，x∈{0,1,…,20/T x-1}，FFP内的最大COT长度为T y＝0.95×T x，FFP内的空闲时间的长度至少为T z＝max(0.05T x，100μs)。
图13给出了固定帧周期长度为4ms时的一个示例。如图13所示，UE在收到基站配置的FFP长度T x＝4ms后，可以根据x∈{0,1,…,20/T x-1}确定x∈{0,1,2,3,4}，进而UE可以确定在每两个连续的无线帧内每个FFP的起始位置为0ms、4ms、8ms、12ms、16ms。在每个FFP内，最大COT长度为T y＝3.8ms，空闲时间的长度为T z＝0.2ms。
为便于更好的理解本申请实施例，对本申请存在的技术问题进行说明。
在NR-U系统的半静态信道接入中，支持gNB或UE在固定帧周期的起始位置之前进行固定长度的LBT，如果LBT成功(即信道空闲)，gNB进行下行传输或UE进行上行传输以发起信道占用，由于在NR-U系统中，下行传输资源和上行传输资源都是基于基站调度的，因此，基站可以保证在固定帧周期的起始位置有下行传输或上行传输，从而gNB或UE可以进行相应的LBT并在LBT成功后发起信道占用。
在SL-U系统中，也需要支持半静态信道接入，但是在SL-U系统中基于终端自主选取资源的资源分配方式中，无法保证在固定帧周期的起始位置有用户进行侧行传输，如果没有UE在固定帧周期的起始位置进行侧行传输，也就没有UE在固定帧周期的起始位置之前进行LBT并发起信道占用。具体的，如图14所示，固定帧周期(FFP)的配置可以与图13中的配置相同，即一个固定帧周期长度T x＝4ms，在每个FFP内，最大COT长度为T y＝3.8ms，空闲时间的长度为T z＝0.2ms。LBT的长度是固定的，例如，LBT长度为一个侦听时隙的长度，即T sl＝9μs，当在该9μs的范围内监测到4μs的空闲，即可认为信道是空闲的。若侧行子载波大小为15kHz，一个FFP的长度内包括4个时隙，若在第一个时隙中(即图14中时隙n)没有终端进行侧行传输，也就没有终端在FFP之前的空闲时间(idle period)内进行LBT，也没有终端发起信道占用，在该FFP内其他时隙内的终端在其对应的传输之前检测不到其他终端的侧行传输或共享的COT信息，也就不会在该FFP内进行侧行传输，因此，若FFP中第一个时隙没有终端进行侧行传输，就会导致该FFP内所有的终端都不会进行侧行传输，即在图14中，UE1无法在时隙n+1上选取或预留的传输资源上进行侧行传输，UE2无法在时隙n+2上选取或预留的传输资源上进行侧行传输，浪费传输资源，降低传输效率和资源利用率。因此，如何保证UE在固定帧周期内的侧行传输，是需要解决的问题。
基于上述问题，本申请提出了一种侧行传输方案，引入了第一终端在第一FFP内进行侧行传输的条件，从而可以确保第一终端在第一FFP内的侧行传输，优化了FFP内的侧行传输。
以下通过具体实施例详述本申请的技术方案。
图15是根据本申请实施例的无线通信的方法200的示意性流程图，如图15所示，该无线通信的方法200可以包括如下内容中的至少部分内容：
S210，在满足第一条件的情况下，第一终端在第一FFP内进行侧行传输；其中，该第一条件包括以下至少之一：该第一终端在该第一FFP之前执行的信道侦听结果为空闲，该第一终端在该第一FFP内的传输资源之前检测到了其他终端的侧行传输，该第一终端在该第一FFP内的传输资源之前检测到 了其他终端的COT共享信息，该第一终端为在该第一FFP的起始位置发起信道占用的终端的目标接收终端，该第一终端为在该第一FFP内发送COT共享信息的终端的目标接收终端，该第一终端的侧行传输的目标接收端包括在该第一FFP的起始位置发起信道占用的终端，该第一终端的侧行传输的目标接收端包括在该第一FFP内发送COT共享信息的终端，该第一终端的侧行传输的结束位置位于该第一FFP内的空闲时间的起始位置之前。
在本申请实施例中，引入了第一终端在第一FFP内进行侧行传输的条件，从而可以确保第一终端在第一FFP内的侧行传输，优化了FFP内的侧行传输。
在一些实施例中，该第一条件由协议约定，或者，该第一条件由预配置信息确定，或者，该第一条件由网络设备配置，或者，该第一条件根据第二终端的指示信息确定，其中，该第二终端是在该第一FFP的起始位置发起信道占用的终端，或者，该第二终端是在该第一FFP内发送COT共享信息的终端。
需要说明的是，该第一FFP可以FFP周期中的任意一个FFP。例如，第一FFP是如图14所示的3个FFP中的最后一个FFP。
在一些实施例中，第一终端在第一FFP的起始时刻之前进行信道侦听(sensing)，以及该第一终端根据侦听结果确定是否可以在该第一FFP内进行侧行传输。具体例如，在侦听结果为空闲的情况下，第一终端确定可以在第一FFP内进行侧行传输。
在一些实施例中，第一终端在第一FFP的起始时刻之前进行信道侦听(sensing)，包括：该第一终端在与该第一FFP相邻并且位于该第一FFP之前的一个FFP内的空闲时间进行信道侦听。在一些实施例中，该空闲时间可以是FFP内空闲时间中的部分或全部空闲时间。
在一些实施例中，该第一终端接收第一配置信息，其中，该第一配置信息用于指示半静态信道接入方式，或者，该第一配置信息用于指示利用半静态信道接入方式进行信道接入。具体例如，该第一终端接收网络设备发送的该第一配置信息，或者，该第一终端接收第二终端发送的该第一配置信息，其中，该第二终端是在该第一FFP的起始位置发起信道占用的终端，或者，该第二终端是在该第一FFP内发送COT共享信息的终端。
在一些实施例中，该第一终端接收第二配置信息，其中，该第二配置信息包括半静态信道接入配置参数；该第一终端根据该第二配置信息确定以下信息中的至少之一：FFP的周期信息，FFP的起始位置，FFP内的空闲时间的长度，FFP内的最大信道占用时长。具体例如，该第一终端接收网络设备发送的该第二配置信息，或者，该第一终端接收第二终端发送的该第二配置信息，其中，该第二终端是在该第一FFP的起始位置发起信道占用的终端，或者，该第二终端是在该第一FFP内发送COT共享信息的终端。
可选地，该半静态信道接入配置参数包括周期参数(以毫秒(ms)为单位)，偏移参数(用OFDM符号数表示)。
在一些实施例中，该第一终端是在该第一FFP内选取或预留了传输资源的终端，或者，该第一终端是在该第一FFP内由网络设备分配了侧行传输资源的终端。
在一些实施例中，第一终端在第一FFP内的传输资源可以是该第一终端在该第一FFP内选取或预留的传输资源。在一些实施例中，第一终端在第一FFP内的传输资源可以是网络设备为该第一终端分配的传输资源。
在一些实施例中，第一终端在第一FFP内的传输资源的起始位置位于该第一FFP的起始位置之后。
在一些实施例中，第一终端在第一FFP内的传输资源的起始位置与该第一FFP的起始位置相同。
需要说明的是，该第一FFP内可以包括一个或多个终端选取或预留的传输资源。本申请实施例对此并不限定。
需要说明的是，该第一FFP内可以包括该第一终端的一个或多个传输资源，本申请实施例对此并不限定。
在一些实施例中，在第一条件至少包括第一终端在第一FFP内的传输资源之前检测到了其他终端的侧行传输的情况下，该第一终端检测到的其他终端的侧行传输包括但不限于以下至少之一：物理侧行共享信道(PSSCH)，物理侧行控制信道(PSCCH)，物理侧行反馈信道(Physical Sidelink Feedback Channel，PSFCH)，侧行同步信号块(Sidelink Synchronization Signal Block，S-SSB)，侧行控制信息(Sidelink Control Information，SCI)。
在一些实施例中，若第一条件为第一终端在第一FFP之前执行的信道侦听结果为空闲，在满足第一条件的情况下，第一终端在第一FFP的起始位置开始进行侧行传输，和/或，第一终端在第一FFP内的传输资源上进行侧行传输。
需要说明的是，该第一终端可以通过在第一FFP的起始位置开始进行侧行传输，以进行信道占用。
在一些实施例中，若第一条件为第一终端在第一FFP内的传输资源之前检测到了其他终端的侧行传输，在满足第一条件的情况下，第一终端在第一FFP内的传输资源上进行侧行传输。
在一些实施例中，若第一条件为第一终端在第一FFP内的传输资源之前检测到了其他终端的COT共享信息，在满足第一条件的情况下，第一终端在第一FFP内的传输资源上进行侧行传输。
在一些实施例中，若第一条件为第一终端为在第一FFP的起始位置发起信道占用的终端的目标接收终端，在满足第一条件的情况下，第一终端在第一FFP内的传输资源上进行侧行传输。
在一些实施例中，若第一条件为第一终端为在第一FFP内发送COT共享信息的终端的目标接收终端，在满足第一条件的情况下，第一终端在第一FFP内的传输资源上进行侧行传输。
在一些实施例中，若第一条件为第一终端的侧行传输的目标接收端包括在第一FFP的起始位置发起信道占用的终端，在满足第一条件的情况下，第一终端在第一FFP内的传输资源上进行侧行传输。
在一些实施例中，若第一条件为第一终端的侧行传输的目标接收端包括在第一FFP内发送COT共享信息的终端，在满足第一条件的情况下，第一终端在第一FFP内的传输资源上进行侧行传输。
在一些实施例中，若第一条件为第一终端在第一FFP之前执行的信道侦听结果为空闲和第一终端的侧行传输的结束位置位于第一FFP内的空闲时间的起始位置之前，在满足第一条件的情况下，第一终端在第一FFP的起始位置开始进行侧行传输，和/或，第一终端在第一FFP内的传输资源上进行侧行传输。
在一些实施例中，若第一条件为第一终端在第一FFP内的传输资源之前检测到了其他终端的侧行传输和第一终端的侧行传输的结束位置位于第一FFP内的空闲时间的起始位置之前，在满足第一条件的情况下，第一终端在第一FFP内的传输资源上进行侧行传输。
在一些实施例中，若第一条件为第一终端在第一FFP内的传输资源之前检测到了其他终端的COT共享信息和第一终端的侧行传输的结束位置位于第一FFP内的空闲时间的起始位置之前，在满足第一条件的情况下，第一终端在第一FFP内的传输资源上进行侧行传输。
在一些实施例中，若第一条件为第一终端为在第一FFP的起始位置发起信道占用的终端的目标接收终端和第一终端的侧行传输的结束位置位于第一FFP内的空闲时间的起始位置之前，在满足第一条件的情况下，第一终端在第一FFP内的传输资源上进行侧行传输。
在一些实施例中，若第一条件为第一终端为在第一FFP内发送COT共享信息的终端的目标接收终端和第一终端的侧行传输的结束位置位于第一FFP内的空闲时间的起始位置之前，在满足第一条件的情况下，第一终端在第一FFP内的传输资源上进行侧行传输。
在一些实施例中，若第一条件为第一终端的侧行传输的目标接收端包括在第一FFP的起始位置发起信道占用的终端和第一终端的侧行传输的结束位置位于第一FFP内的空闲时间的起始位置之前，在满足第一条件时，第一终端在第一FFP内的传输资源上进行侧行传输。
在一些实施例中，若第一条件为第一终端的侧行传输的目标接收端包括在第一FFP内发送COT共享信息的终端和第一终端的侧行传输的结束位置位于第一FFP内的空闲时间的起始位置之前，在满足第一条件的情况下，第一终端在第一FFP内的传输资源上进行侧行传输。
在一些实施例中，在第一条件至少包括第一终端在第一FFP之前执行的信道侦听结果为空闲，且在满足该第一条件的情况下，该第一终端在第一FFP内进行侧行传输，包括：该第一终端在该第一FFP的起始位置开始进行侧行传输。
在一些实施例中，该第一终端在该第一FFP的起始位置开始进行的侧行传输的时长基于以下至少之一确定：预配置信息，网络配置信息，资源池配置信息，侧行BWP配置信息，半静态信道接入配置信息，一个OFDM符号对应的时长，信道接入优先级信息或侧行优先级信息。
具体例如，预配置信息中包括一个参数，该参数用于指示第一终端发起信道占用所对应的时长，也即，该参数可以指示第一终端在第一FFP的起始位置开始进行的侧行传输的时长。
具体例如，网络配置信息中包括一个参数，该参数用于指示第一终端发起信道占用所对应的时长，也即，该参数可以指示第一终端在第一FFP的起始位置开始进行的侧行传输的时长。
具体例如，资源池配置信息中包括一个参数，该参数用于指示第一终端发起信道占用所对应的时长，也即，该参数可以指示第一终端在第一FFP的起始位置开始进行的侧行传输的时长。
具体例如，半静态信道接入配置信息中包括一个或多个参数，该一个或多个参数用于指示第一终端发起信道占用所对应的时长，也即，该一个或多个参数可以指示第一终端在第一FFP的起始位置开始进行的侧行传输的时长。
可选地，信道接入优先级信息可以基于预配置信息或网络配置信息确定，或者基于侧行数据的服务质量(Quality of Service，QoS)信息、PC5 5G服务质量标识(PC5 5G QoS Identifier，PQI)信息 或侧行优先级确定。具体的，该第一终端可以基于该信道接入优先级信息确定该第一终端发起信道占用所对应的时长，也即，确定该第一终端在该第一FFP的起始位置开始进行的侧行传输的时长。具体的，通过预配置信息或网络配置信息确定信道接入优先级信息和信道占用时长的对应关系，第一终端根据信道接入优先级以及该对应关系确定该第一终端发起信道占用所对应的时长。
可选地，侧行优先级信息可以基于预配置信息或网络配置信息确定，或者基于侧行数据的QoS信息、PQI信息或侧行优先级确定。具体的，该第一终端可以基于该侧行优先级信息确定该第一终端发起信道占用所对应的时长，也即，确定该第一终端在该第一FFP的起始位置开始进行的侧行传输的时长。具体的，通过预配置信息或网络配置信息确定侧行优先级和信道占用时长的对应关系，第一终端根据侧行优先级以及该对应关系确定该第一终端发起信道占用所对应的时长。对于PSCCH和PSSCH，其侧行优先级根据SCI中的优先级信息域确定；对于PSFCH，其侧行优先级根据该PSFCH所对应的PSSCH的侧行优先级确定；对于S-SSB，其侧行优先级根据预配置信息或网络配置信息确定。
在一些实施例中，在该第一终端在该第一FFP的起始位置开始进行的侧行传输的时长基于一个OFDM符号对应的时长确定的情况下，该第一终端在该第一FFP的起始位置开始进行的侧行传输的时长不超过一个OFDM符号对应的时长。在一些实施例中，一个OFDM符号对应的时长包括循环前缀(Cyclic Prefix，CP)对应的时长。在又一些实施例中，一个OFDM符号对应的时长不包括循环前缀(Cyclic Prefix，CP)对应的时长。
需要说明的是，若第一FFP内的起始位置存在终端进行侧行传输，当其他终端在该时隙(即第一FFP内的第一个时隙)中进行侧行传输发起信道占用，会导致与该时隙(即第一FFP内的第一个时隙)中正常侧行传输的终端之间产生干扰，而且可能会影响接收端的AGC处理，因此，对于该第一FFP内除第一个时隙内进行侧行传输的终端之外的其他终端，如果在第一FFP的起始位置进行侧行传输以发起信道占用，在第一FFP的起始位置开始进行的侧行传输的时长不超过一个OFDM符号对应的时长，降低对接收端AGC处理的影响。
在一些实施例中，该第一终端在该第一FFP的起始位置开始进行的侧行传输的时长基于以下公式1确定：
T 1＝S×T 2     公式1
其中，T 1表示该第一终端在该第一FFP的起始位置开始进行的侧行传输的时长，T 2表示一个OFDM符号对应的时长，0＜S≤1。
在一些实施例中，S的取值基于资源池配置信息确定，或者，S的取值基于侧行BWP配置信息确定，或者，S的取值基于半静态信道接入配置信息确定，或者，S的取值基于协议预定义信息确定。
具体例如，如图16所示，一个时隙中包括14个OFDM符号，其中，第一个OFDM符号通常用作AGC，S＝0.5，即T 1的长度为一个OFDM符号长度的一半。如果UE1和UE2都在FFP(即图16中示出的3个FFP中的第三个FFP)的起始位置(即图16中的时隙n)进行时长为T 1的侧行传输，同时，在时隙n内有UE0进行侧行传输，UE0利用时隙n中除最后一个GP符号之外的其他所有的符号(即符号0至12)进行侧行传输，其中，第一个符号用于接收端进行AGC调整，虽然UE1和UE2也在第一个符号的前半个符号上进行侧行传输，但是在该第一个符号的后半个符号上只有UE0进行数据传输，因此，接收端可以利用该第一个符号的后半个符号进行AGC调整，从而可以正确接收时隙n内UE0发送的侧行数据。
在一些实施例中，该第一终端在该第一FFP的起始位置开始进行的侧行传输的时长基于该第一FFP内的第一个时隙中可用于侧行传输的OFDM符号对应的时长确定。
在一些实施例中，该第一终端在该第一FFP的起始位置开始进行的侧行传输的时长基于该第一FFP内的第一个时隙中可用于PSSCH传输的OFDM符号对应的时长确定。例如，第一终端在第一FFP的起始位置开始进行的侧行传输的时长等于该第一FFP内的第一个时隙中用于PSSCH传输的OFDM符号对应的时长。
在一些实施例中，本申请实施例对第一终端在第一FFP的起始位置开始进行的侧行传输对应的频域资源不做限定，例如，第一终端在第一FFP的起始位置开始进行的侧行传输对应的频域资源可以包括一个或多个IRB，或者，包括一个或多个子信道，或者，包括一个或多个PRB。
在一些实施例中，该第一终端在该第一FFP的起始位置开始进行的侧行传输对应的传输资源为在该第一FFP内的第一个时隙中随机选取的传输资源，或者，该第一终端在该第一FFP的起始位置开始进行的侧行传输对应的传输资源为该第一FFP内的第一个时隙中的部分或全部公共传输资源。
需要说明的是，公共传输资源即多个终端共用的传输资源。
在一些实施例中，该公共传输资源的大小基于PSSCH的频域资源粒度确定。
在一些实施例中，在PSSCH的频域资源粒度为基于梳齿资源块(IRB)的频域资源粒度的情况下，该公共传输资源对应一个或多个梳齿资源。
在一些实施例中，在PSSCH的频域资源粒度为基于连续物理资源块(PRB)的频域资源粒度的情况下，该公共传输资源对应一个或多个子信道。
在一些实施例中，该公共传输资源包括一组频域连续的PRB或两组频域连续的PRB，其中，每组频域连续的PRB包括至少一个PRB。
在一些实施例中，在公共传输资源包括两组频域连续的PRB的情况下，一组频域连续的PRB包括具有最低索引的PRB，另一组频域连续的PRB包括具有最高索引的PRB。也即，公共传输资源位于信道的频域位置的两端，以满足占用信道带宽(occupied channel bandwidth，OCB)的需求。
需要说明的是，最低索引的PRB可以对应于资源池、或RB set、或信道中的PRB的最低索引。同理，最高索引的PRB可以对应于资源池、或RB set、或信道中的PRB的最高索引。
在一些实施例中，该公共传输资源的频域大小和/或频域位置基于以下至少之一确定：
预配置信息，网络配置信息，资源池配置信息，侧行BWP配置信息，半静态信道接入配置信息。
在一些实施例中，在第一终端在第一FFP的起始位置开始进行的侧行传输对应的传输资源为该第一FFP内的第一个时隙中的部分或全部公共传输资源的情况下，其他终端在进行资源选取时，排除与该公共传输资源存在重叠的传输资源。
具体例如，如图17所示，半静态信道接入的配置可以与如图13所示的配置相同，UE0、UE1、UE2的传输资源分别位于FFP(即图17中示出的3个FFP中的第三个FFP)内的第一个时隙(时隙n)、第二个时隙(时隙n+1)和第三个时隙(时隙n+2)，若UE1和UE2在该FFP的起始时刻之前进行侦听，若信道空闲，UE1和UE2在该FFP起始位置进行侧行传输发起信道占用，则UE1和UE2可以在该FFP内的第一个时隙(时隙n)中的公共传输资源中进行侧行传输，如图17所示，该公共传输资源位于第一个时隙(时隙n)中的子信道3，即UE1和UE2都利用该子信道3进行侧行传输，而时隙n中的UE0的传输资源不能包括子信道3，以避免干扰，UE0可以利用其余子信道对应的资源进行侧行传输，即UE0可用的子信道包括子信道0、子信道1和子信道2。
在一些实施例中，该第一终端为在该第一FFP内选取或预留了传输资源的终端，或者，该第一终端为在该第一FFP内由网络设备分配了传输资源的终端。也即，在该第一FFP内选取或预留了传输资源的所有终端或者由网络设备分配了传输资源的所有终端都可以在该第一FFP的起始时刻之前进行信道侦听。
具体的，对于在第一FFP内选取或预留了传输资源的终端，由于这些终端会利用选取或预留的传输资源进行侧行传输，这些终端可以在该第一FFP的起始位置之前进行侦听，若信道空闲可以在第一FFP起始位置发起信道占用，由于这些终端已经通过侦听成功并发起信道占用，因此，当这些终端在利用选取或预留的传输资源进行侧行传输时，无需在该第一FFP内检测到其他终端的侧行传输或共享的COT即可以进行相应的侧行传输。
具体例如，在图14中，UE1和UE2分别在FFP(即图14中示出的3个FFP中的第三个FFP)内的第二个时隙(时隙n+1)和第三个时隙(时隙n+2)中选取了传输资源，但是该FFP内的第一个时隙(时隙n)中没有UE进行侧行传输，UE1和UE2在该FFP之前的空闲时间内进行侦听，若信道空闲，则UE1和UE2发起信道占用，例如UE1和UE2进行时长T 1的侧行传输。
如图14所示，UE1在第二个时隙(时隙n+1)进行侧行传输时，若该侧行传输与前一个侧行传输(前一个侧行传输可以是UE1的侧行传输，也可以是其他UE的侧行传输)之间的间隔小于或等于16μs，则UE1可以不进行侦听，直接进行侧行传输；若该侧行传输与前一个侧行传输之间的间隔大于16μs，则UE1执行第一侦听时长的侦听，若侦听结果为信道空闲，UE1可以进行侧行传输，否则丢弃该侧行传输。其中，第一侦听时长等于9μs或16μs；进一步地，UE1在第三时长内执行该第一侦听时长的侦听，该第三时长等于25μs。
如图14所示，UE2在第三个时隙(时隙n+2)进行侧行传输时，若该侧行传输与前一个侧行传输(前一个侧行传输可以是UE2的侧行传输，也可以是其他UE的侧行传输)之间的间隔小于或等于16μs，则UE2可以不进行侦听，直接进行侧行传输；若该侧行传输与前一个侧行传输之间的间隔大于16μs，则UE2执行第一侦听时长的侦听，若侦听结果为信道空闲，UE2可以进行侧行传输，否则丢弃该侧行传输；其中，第一侦听时长等于9μs或16μs；进一步地，UE2在第三时长内执行该第一侦听时长的侦听，该第三时长等于25μs。
可选地，如图14所示的第一侦听时长根据Type 2A信道接入或Type2B信道接入或Type 2C信道接入所对应的侦听时长确定。
在一些实施例中，该第一终端为在该第一FFP内的第一时间窗内选取或预留了传输资源的终端，或者，该第一终端为在该第一FFP内的第一时间窗内由网络设备分配了传输资源的终端。
在一些实施例中，该第一时间窗的位置和/或长度由协议约定，或者，该第一时间窗的位置和/或长度由预配置信息确定，或者，该第一时间窗的位置和/或长度由网络设备配置信息确定。
在一些实施例中，该第一时间窗的长度基于第一时长确定，其中，该第一时长的取值与子载波间隔的大小关联。
可选地，该第一时长表示为
Figure PCTCN2022118990-appb-000001
其中，
Figure PCTCN2022118990-appb-000002
的取值可以如下表2所示。
表2
Figure PCTCN2022118990-appb-000003
在一些实施例中，该第一时长由以下至少之一确定：PSCCH的检测时间，COT共享信息的检测时间，侧行同步信号的检测时间，PSFCH信道的检测时间。
具体的，若第一终端在第一FFP内的起始位置有待进行的侧行传输，该第一终端在第一FFP起始位置之前进行侦听，若信道空闲，该第一终端从第一FFP起始位置开始进行侧行传输，若第一FFP内其他时隙的终端能够检测到该第一终端的侧行传输，则其他终端可以判断该第一FFP被侧行传输占用，进而可以进行相应的侧行传输；但是其他终端检测PSCCH需要处理时间
Figure PCTCN2022118990-appb-000004
只有传输资源位于第一FFP内第一个时隙之后
Figure PCTCN2022118990-appb-000005
的终端才能够判断是否能够检测到PSCCH，否则无法检测PSCCH，也就无法判断是否存在侧行传输。因此，第一时间窗的时长根据
Figure PCTCN2022118990-appb-000006
确定，传输资源位于相对于第一FFP的起始位置
Figure PCTCN2022118990-appb-000007
之后的终端可以检测到PSCCH，进而判断该第一FFP是否被侧行传输占用，否则该终端无法通过检测PSCCH判断该第一FFP是否被占用，只能自己在第一FFP起始位置之前进行侦听。
在一些实施例中，该第一时间窗的起始位置与该第一FFP的起始位置相同。
具体例如，如图18所示，半静态信道接入的配置可以与如图13所示的配置相同，第一时间窗的窗长对应两个时隙(即时隙n和时隙n+1)，并且从FFP(即图18中示出的3个FFP中的第三个FFP)的起始位置开始，选取或预留的传输资源位于第一时间窗内的UE包括UE1，因此，UE1在该FFP的起始时刻之前进行侦听，若信道空闲，UE1在该FFP起始位置发起信道占用，并且UE1可以利用该FFP内第二个时隙(时隙n+1)上的传输资源进行侧行传输，当UE2检测到UE1发送的侧行传输时可以判断该FFP可用，进而利用该FFP内的第三个时隙(时隙n+2)上选取或预留的侧行传输资源进行侧行传输。
在一些实施例中，该第一终端为任意一个终端。也即，对于任意一个UE都可以在第一FFP的起始时刻之前进行侦听；若侦听结果为信道空闲，UE都可以在第一FFP起始位置发起信道占用。
在一些实施例中，该第一终端在该第一FFP之前执行的信道侦听为在该第一FFP之前的空闲时间内进行的。可选地，该第一FFP之前的空闲时间可以是与该第一FFP相邻并在该第一FFP之前的一个FFP内的空闲时间。具体例如，该第一终端在该第一FFP之前的空闲时间内进行信道侦听，以及该第一终端根据侦听结果确定是否可以在该第一FFP内进行侧行传输。具体例如，在侦听结果为空闲的情况下，第一终端确定可以在第一FFP内进行侧行传输。
在一些实施例中，该第一终端在该第一FFP之前执行的信道侦听为在该第一FFP之前的第一侦听时长内进行的。具体例如，该第一终端在该第一FFP之前的第一侦听时长内进行信道侦听，以及该第一终端根据侦听结果确定是否可以在该第一FFP内进行侧行传输。具体例如，在侦听结果为空闲的情况下，第一终端确定可以在第一FFP内进行侧行传输。
在一些实施例中，该第一侦听时长等于9微秒或16微秒。
在一些实施例中，若该第一终端在该第一FFP内选取或预留了传输资源，或者，若该第一终端在该第一FFP内由网络设备分配了传输资源，且该第一终端在该第一FFP内的传输资源的起始位置位 于该第一FFP的起始位置之后，若第一侧行传输与前一个侧行传输之间的时间间隔小于或等于第二时长，该第一终端直接进行该第一侧行传输，且无需执行信道侦听；其中，该第一侧行传输为该第一终端在该第一FFP内的传输资源上执行的侧行传输，该第一侧行传输的前一个侧行传输为该第一FFP内执行的一个侧行传输。
在一些实施例中，若该第一终端在该第一FFP内选取或预留了传输资源，或者，若该第一终端在该第一FFP内由网络设备分配了传输资源，且该第一终端在该第一FFP内的传输资源的起始位置位于该第一FFP的起始位置之后，若第一侧行传输与前一个侧行传输之间的时间间隔大于第二时长，该第一终端执行第一侦听时长的信道侦听；以及在该第一侦听时长的信道侦听结果为空闲的情况下，该第一终端执行该第一侧行传输，否则，该第一终端忽略或放弃该第一侧行传输；其中，该第一侧行传输为该第一终端在该第一FFP内选取或预留的传输资源上执行的侧行传输，该第一侧行传输的前一个侧行传输为该第一FFP内执行的一个侧行传输。
在一些实施例中，该第二时长基于以下至少之一确定：预配置信息，网络配置信息，资源池配置信息，侧行BWP配置信息，半静态信道接入配置信息。可选地，该第二时长等于16μs。
在一些实施例中，该第一侧行传输的前一个侧行传输由该第一终端执行，或者，该第一侧行传输的前一个侧行传输由其他终端执行。
在一些实施例中，该第一终端执行第一侦听时长的信道侦听，包括：
该第一终端在第三时长内执行第一侦听时长的信道侦听。
在一些实施例中，该第三时长基于以下至少之一确定：协议预定义信息，预配置信息，网络配置信息，资源池配置信息，侧行BWP配置信息，半静态信道接入配置信息。可选地，该第三时长等于25微秒。
在一些实施例中，该第一侦听时长小于或等于该第二时长。
具体例如，若第一终端在第一FFP内的传输资源不是从第一FFP的起始位置开始，当该第一终端在第一FFP内进行侧行传输时，该第一终端需要根据当前的侧行传输与前一个侧行传输之间的间隔确定是否能够进行侧行传输。若当前侧行传输与前一个侧行传输(前一个侧行传输可以是第一终端UE的侧行传输，也可以是其他终端的侧行传输)之间的间隔小于或等于16μs，则该第一终端可以不进行侦听，直接进行侧行传输；和/或，若当前侧行传输与前一个侧行传输之间的间隔大于16μs，则该第一终端执行第一侦听时长的侦听，若侦听结果为信道空闲，该第一终端可以进行侧行传输，否则丢弃该侧行传输；其中，第一侦听时长等于9μs或16μs；进一步地，该第一终端在第三时长内执行该第一侦听时长的侦听，该第三时长等于25μs。
在一些实施例中，该第一侦听时长基于以下之一确定：类型2A信道接入所对应的侦听时长，类型2B信道接入所对应的侦听时长，类型2C信道接入所对应的侦听时长，一个侦听时隙对应的时长。
在一些实施例中，该第一侦听时长由协议约定，或者，该第一侦听时长由网络设备配置，或者，该第一侦听时长由第二终端指示，或者，该第一侦听时长为从资源池配置信息中获取的，或者，该第一侦听时长为从侧行BWP配置信息中获取的，或者，该第一侦听时长为从半静态信道接入配置信息中获取的。可选地，该第二终端为在该第一FFP的起始位置进行侧行传输的终端。
在一些实施例中，对于第一终端将要在第一FFP内传输的侧行信道的类型不做限定，例如侧行信道可以包括：PSCCH、PSSCH、PSFCH、S-SSB等。以下以发送PSFCH为例进行说明，如图19所示，半静态信道接入的配置可以与如图13所示的配置相同，PSFCH的周期为4个时隙，图19中时隙n、n+4中包括PSFCH传输资源，UE1在时隙n+1向UE2发送PSCCH/PSSCH，UE2需要在时隙n+4向UE1发送PSFCH，由于UE2的PSFCH的传输资源不是位于FFP的起始位置，因此，UE2需要在FFP起始位置之前进行侦听，并且在信道空闲的情况下发起信道占用。
在一些实施例中，该第一终端在确定候选传输资源集合时，若第一传输资源与该第一FFP内的空闲时间存在重叠，该第一终端从该候选传输资源集合中排除该第一传输资源；
其中，该第一传输资源包括以下至少之一：
用于传输PSCCH的传输资源，用于传输PSSCH的传输资源。
具体例如，对于一个时隙中的传输资源，即该时隙中用于传输PSSCH的时域符号(不包括GP符号以及用于传输PSFCH的符号)，若用于传输PSSCH的时域符号与第一FFP内的空闲时间有重叠，则排除掉该传输资源。
具体例如，如图20所示，FFP的周期为4ms，对于15kHz的子载波大小，一个FFP周期中包括4个时隙，空闲时间的长度为200μs，则该空闲时间对应的时长大于2个、小于3个OFDM符号的时长，即FFP的第四个时隙中的传输资源与该空闲时间有重叠，因此，该第四个时隙中的传输资源都是不可用的资源。选择窗大小为16个时隙，对应4个FFP周期，在确定候选传输资源集合时，需要从 候选传输资源集合中排除掉选择窗中每个FFP周期中的第4个时隙对应的传输资源。图20中所示的是选择窗的起始位置与FFP周期的起始位置对齐的情况，对于选择窗的起始位置与FFP周期的起始位置不对齐的情况，同样适用，即在确定候选传输资源集合时，从选择窗中排除掉每个FFP周期中的第4个时隙对应的传输资源。
在一些实施例中，该第一终端在确定候选传输资源集合时，若与利用第二传输资源传输的PSSCH相关联的PSFCH的传输资源与该第一FFP内的空闲时间存在重叠，该第一终端从该候选传输资源集合中排除该第二传输资源。
在一些实施例中，若与利用第三传输资源传输的PSSCH相关联的PSFCH的传输资源与该第一FFP内的空闲时间存在重叠，该第一终端重新进行资源选取，或者，该第一终端丢弃或忽略利用该第三传输资源进行的PSSCH传输。
具体的，如图20所示，PSFCH的周期为2个时隙，若第一终端选取时隙n(最后一个FFP内的第一个时隙)中的传输资源用于传输PSSCH，其对应的PSFCH传输资源位于时隙n+3，并且与该FFP内的空闲时间重叠，即该PSFCH传输资源是不可用的，若该第一终端发送的PSSCH需要进行侧行反馈，则接收端无法进行侧行反馈，因此，该第一终端在确定候选资源集合时排除掉该时隙上的传输资源，或者，在进行资源选取时不选取该时隙上的传输资源。
可选地，通过配置信息避免PSFCH的传输资源与FFP周期中的空闲时间有重叠，即第一终端不期望PSFCH的传输资源与FFP周期中的空闲时间有重叠。
在一些实施例中，该第一终端在候选传输资源集合中选取传输资源时，优先选取该第一FFP内的第一个时隙上的传输资源。
具体的，第一终端优先选取第一FFP内第一个时隙中的传输资源，使得该第一终端可以在第一FFP的起始时刻之前进行侦听，若信道空闲，则利用该第一FFP内的第一个时隙中的传输资源进行侧行传输并发起信道占用，第一FFP内其他时隙内的终端如果检测到该第一终端的侧行传输，即认为该第一FFP已经被侧行传输占用，因此其他终端可以进行相应的侧行传输。
因此，在本申请实施例中，引入了第一终端在第一FFP内进行侧行传输的条件，从而可以确保第一终端在第一FFP内的侧行传输，优化了FFP内的侧行传输。
在本申请实施例中，通过FFP周期内有资源选取或预留的终端在FFP起始位置之前进行侦听并发起信道占用，使得即使FFP周期中第一个时隙内没有终端进行侧行传输以发起信道占用的情况下，该FFP周期中其他的终端同样利用该FFP周期中的传输资源进行侧行传输；另外，通过优先选取FFP周期中第一个时隙中的传输资源，使得可以通过LBT并在该时隙中进行侧行传输以发起信道占用。
上文结合图15至图20，详细描述了本申请的方法实施例，下文结合图21至图24，详细描述本申请的装置实施例，应理解，装置实施例与方法实施例相互对应，类似的描述可以参照方法实施例。
图21示出了根据本申请实施例的终端设备300的示意性框图。该终端设备300为第一终端，如图21所示，该终端设备300包括：通信单元310；
在满足第一条件的情况下，该通信单元310用于在第一固定帧周期FFP内进行侧行传输；
其中，该第一条件包括以下至少之一：
该第一终端在该第一FFP之前执行的信道侦听结果为空闲，该第一终端在该第一FFP内的传输资源之前检测到了其他终端的侧行传输，该第一终端在该第一FFP内的传输资源之前检测到了其他终端的信道占用时间COT共享信息，该第一终端为在该第一FFP的起始位置发起信道占用的终端的目标接收终端，该第一终端为在该第一FFP内发送COT共享信息的终端的目标接收终端，该第一终端的侧行传输的目标接收端包括在该第一FFP的起始位置发起信道占用的终端，该第一终端的侧行传输的目标接收端包括在该第一FFP内发送COT共享信息的终端，该第一终端的侧行传输的结束位置位于该第一FFP内的空闲时间的起始位置之前。
在一些实施例中，该第一条件由协议约定，或者，该第一条件由预配置信息确定，或者，该第一条件由网络设备配置，或者，该第一条件根据第二终端的指示信息确定，其中，该第二终端是在该第一FFP的起始位置发起信道占用的终端，或者，该第二终端是在该第一FFP内发送COT共享信息的终端。
在一些实施例中，第一终端在第一FFP的起始时刻之前进行信道侦听(sensing)，以及该第一终端根据侦听结果确定是否可以在该第一FFP内进行侧行传输。具体例如，在侦听结果为空闲的情况下，第一终端确定可以在第一FFP内进行侧行传输。
在一些实施例中，第一终端在第一FFP的起始时刻之前进行信道侦听(sensing)，包括：该第一 终端在与该第一FFP相邻并且位于该第一FFP之前的一个FFP内的空闲时间进行信道侦听。在一些实施例中，该空闲时间可以是FFP内空闲时间中的部分或全部空闲时间。
在一些实施例中，该第一终端在该第一FFP内的传输资源的起始位置位于该第一FFP的起始位置之后。
在一些实施例中，在该第一条件至少包括该第一终端在该第一FFP内的传输资源之前检测到了其他终端的侧行传输的情况下，该第一终端检测到的其他终端的侧行传输包括以下至少之一：物理侧行共享信道PSSCH，物理侧行控制信道PSCCH，物理侧行反馈信道PSFCH，侧行同步信号块S-SSB，侧行控制信息SCI。
在一些实施例中，在该第一条件至少包括该第一终端在该第一FFP之前执行的信道侦听结果为空闲，且在满足该第一条件的情况下，该通信单元310具体用于：
在该第一FFP的起始位置开始进行侧行传输。
在一些实施例中，该第一终端在该第一FFP的起始位置开始进行的侧行传输的时长基于以下至少之一确定：预配置信息，网络配置信息，资源池配置信息，侧行带宽部分BWP配置信息，半静态信道接入配置信息，一个正交频分复用OFDM符号对应的时长，信道接入优先级信息或侧行优先级信息；或者，
该第一终端在该第一FFP的起始位置开始进行的侧行传输的时长基于该第一FFP内的第一个时隙中可用于侧行传输的OFDM符号对应的时长确定；或者，
该第一终端在该第一FFP的起始位置开始进行的侧行传输的时长基于该第一FFP内的第一个时隙中可用于PSSCH传输的OFDM符号对应的时长确定。
在一些实施例中，在该第一终端在该第一FFP的起始位置开始进行的侧行传输的时长基于一个OFDM符号对应的时长确定的情况下，该第一终端在该第一FFP的起始位置开始进行的侧行传输的时长不超过一个OFDM符号对应的时长。
在一些实施例中，该第一终端在该第一FFP的起始位置开始进行的侧行传输的时长基于以下公式确定：
T 1＝S×T 2；
其中，T 1表示该第一终端在该第一FFP的起始位置开始进行的侧行传输的时长，T 2表示一个OFDM符号对应的时长，0＜S≤1。
在一些实施例中，S的取值基于资源池配置信息确定，或者，S的取值基于侧行BWP配置信息确定，或者，S的取值基于半静态信道接入配置信息确定，或者，S的取值基于协议预定义信息确定。
在一些实施例中，该第一终端在该第一FFP的起始位置开始进行的侧行传输对应的传输资源为在该第一FFP内的第一个时隙中随机选取的传输资源，或者，该第一终端在该第一FFP的起始位置开始进行的侧行传输对应的传输资源为该第一FFP内的第一个时隙中的部分或全部公共传输资源。
在一些实施例中，该公共传输资源的大小基于PSSCH的频域资源粒度确定。
在一些实施例中，在PSSCH的频域资源粒度为基于梳齿资源块IRB的频域资源粒度的情况下，该公共传输资源对应一个或多个梳齿资源；或者，
在PSSCH的频域资源粒度为基于连续物理资源块PRB的频域资源粒度的情况下，该公共传输资源对应一个或多个子信道。
在一些实施例中，该公共传输资源包括一组频域连续的PRB或两组频域连续的PRB，其中，每组频域连续的PRB包括至少一个PRB。
在一些实施例中，在该公共传输资源包括两组频域连续的PRB的情况下，一组频域连续的PRB包括具有最低索引的PRB，另一组频域连续的PRB包括具有最高索引的PRB。
在一些实施例中，该公共传输资源的频域大小和/或频域位置基于以下至少之一确定：
预配置信息，网络配置信息，资源池配置信息，侧行BWP配置信息，半静态信道接入配置信息。
在一些实施例中，在该第一终端在该第一FFP的起始位置开始进行的侧行传输对应的传输资源为该第一FFP内的第一个时隙中的部分或全部公共传输资源的情况下，其他终端在进行资源选取时，排除与该公共传输资源存在重叠的传输资源。
在一些实施例中，信道接入优先级信息可以基于预配置信息或网络配置信息确定，或者基于侧行数据的QoS信息、PQI信息或侧行优先级确定。
在一些实施例中，侧行优先级信息可以基于预配置信息或网络配置信息确定，或者基于侧行数据的QoS信息、PQI信息或侧行优先级确定。
在一些实施例中，该第一终端为在该第一FFP内选取或预留了传输资源的终端，或者，该第一终端为在该第一FFP内由网络设备分配了传输资源的终端，或者，该第一终端为在该第一FFP内的第 一时间窗内选取或预留了传输资源的终端，或者，该第一终端为在该第一FFP内的第一时间窗内由网络设备分配了传输资源的终端，或者，该第一终端为任意一个终端。
在一些实施例中，该第一时间窗的位置和/或长度由协议约定，或者，该第一时间窗的位置和/或长度由预配置信息确定，或者，该第一时间窗的位置和/或长度由网络设备配置信息确定。
在一些实施例中，该第一时间窗的长度基于第一时长确定，其中，该第一时长的取值与子载波间隔的大小关联。
在一些实施例中，该第一时长由以下至少之一确定：PSCCH的检测时间，COT共享信息的检测时间，侧行同步信号的检测时间，PSFCH信道的检测时间。
在一些实施例中，该第一时间窗的起始位置与该第一FFP的起始位置相同。
在一些实施例中，该第一终端在该第一FFP之前执行的信道侦听为在该第一FFP之前的空闲时间内进行的，或者，该第一终端在该第一FFP之前执行的信道侦听为在该第一FFP之前的第一侦听时长内进行的。
在一些实施例中，该第一侦听时长等于9微秒或16微秒。
在一些实施例中，若该第一终端在该第一FFP内选取或预留了传输资源，且该第一终端在该第一FFP内选取或预留的传输资源的起始位置位于该第一FFP的起始位置之后，该终端设备300还包括：处理单元320；
若第一侧行传输与前一个侧行传输之间的时间间隔小于或等于第二时长，该通信单元310还用于直接进行该第一侧行传输，且无需执行信道侦听；和/或，
若第一侧行传输与前一个侧行传输之间的时间间隔大于第二时长，该处理单元320用于执行第一侦听时长的信道侦听；以及在该第一侦听时长的信道侦听结果为空闲的情况下，该通信单元310还用于执行该第一侧行传输，否则，该处理单元320用于忽略或放弃该第一侧行传输；
其中，该第一侧行传输为该第一终端在该第一FFP内选取或预留的传输资源上执行的侧行传输，该第一侧行传输的前一个侧行传输为该第一FFP内执行的一个侧行传输。
在一些实施例中，该第一侧行传输的前一个侧行传输由该第一终端执行，或者，该第一侧行传输的前一个侧行传输由其他终端执行。
在一些实施例中，该处理单元320具体用于：
在第三时长内执行第一侦听时长的信道侦听。
在一些实施例中，该第三时长等于25微秒。
在一些实施例中，该第三时长基于以下至少之一确定：协议预定义信息，预配置信息，网络配置信息，资源池配置信息，侧行BWP配置信息，半静态信道接入配置信息。
在一些实施例中，该第一侦听时长小于或等于该第二时长。
在一些实施例中，该第一侦听时长基于以下之一确定：类型2A信道接入所对应的侦听时长，类型2B信道接入所对应的侦听时长，类型2C信道接入所对应的侦听时长，一个侦听时隙对应的时长。
在一些实施例中，该第一侦听时长由协议约定，或者，该第一侦听时长由网络设备配置，或者，该第一侦听时长由第二终端指示，或者，该第一侦听时长为从资源池配置信息中获取的，或者，该第一侦听时长为从侧行BWP配置信息中获取的，或者，该第一侦听时长为从半静态信道接入配置信息中获取的。
在一些实施例中，该第二终端为在该第一FFP的起始位置进行侧行传输的终端。
在一些实施例中，该终端设备300还包括：处理单元320；
该处理单元320用于在确定候选传输资源集合时，若第一传输资源与该第一FFP内的空闲时间存在重叠，该第一终端从该候选传输资源集合中排除该第一传输资源；
其中，该第一传输资源包括以下至少之一：
用于传输PSCCH的传输资源，用于传输PSSCH的传输资源。
在一些实施例中，该终端设备300还包括：处理单元320；
该第一终端在确定候选传输资源集合时，若与利用第二传输资源传输的PSSCH相关联的PSFCH的传输资源与该第一FFP内的空闲时间存在重叠，该处理单元320用于从该候选传输资源集合中排除该第二传输资源。
在一些实施例中，该终端设备300还包括：处理单元320；
若与利用第三传输资源传输的PSSCH相关联的PSFCH的传输资源与该第一FFP内的空闲时间存在重叠，该处理单元320用于重新进行资源选取，或者，该处理单元320用于丢弃或忽略利用该第三传输资源进行的PSSCH传输。
在一些实施例中，该终端设备300还包括：处理单元320；
该处理单元320用于在候选传输资源集合中选取传输资源时，优先选取该第一FFP内的第一个时隙上的传输资源。
在一些实施例中，该通信单元310还用于接收第一配置信息，其中，该第一配置信息用于指示半静态信道接入方式，或者，该第一配置信息用于指示利用半静态信道接入方式进行信道接入。
在一些实施例中，该终端设备300还包括：处理单元320；
该通信单元310还用于接收第二配置信息，其中，该第二配置信息包括半静态信道接入配置参数；
该处理单元320用于根据该第二配置信息确定以下信息中的至少之一：FFP的周期信息，FFP的起始位置，FFP内的空闲时间的长度，FFP内的最大信道占用时长。
在一些实施例中，上述通信单元可以是通信接口或收发器，或者是通信芯片或者片上系统的输入输出接口。上述处理单元可以是一个或多个处理器。
应理解，根据本申请实施例的终端设备300可对应于本申请方法实施例中的第一终端，并且终端设备300中的各个单元的上述和其它操作和/或功能分别为了实现图15所示方法200中第一终端的相应流程，为了简洁，在此不再赘述。
图22是本申请实施例提供的一种通信设备400示意性结构图。图22所示的通信设备400包括处理器410，处理器410可以从存储器中调用并运行计算机程序，以实现本申请实施例中的方法。
在一些实施例中，如图22所示，通信设备400还可以包括存储器420。其中，处理器410可以从存储器420中调用并运行计算机程序，以实现本申请实施例中的方法。
其中，存储器420可以是独立于处理器410的一个单独的器件，也可以集成在处理器410中。
在一些实施例中，如图22所示，通信设备400还可以包括收发器430，处理器410可以控制该收发器430与其他设备进行通信，具体地，可以向其他设备发送信息或数据，或接收其他设备发送的信息或数据。
其中，收发器430可以包括发射机和接收机。收发器430还可以进一步包括天线，天线的数量可以为一个或多个。
在一些实施例中，处理器410可以实现终端设备中的处理单元的功能，为了简洁，在此不再赘述。
在一些实施例中，收发器430可以实现终端设备中的通信单元的功能，为了简洁，在此不再赘述。
在一些实施例中，该通信设备400具体可为本申请实施例的终端设备，并且该通信设备400可以实现本申请实施例的各个方法中由第一终端实现的相应流程，为了简洁，在此不再赘述。
图23是本申请实施例的装置的示意性结构图。图23所示的装置500包括处理器510，处理器510可以从存储器中调用并运行计算机程序，以实现本申请实施例中的方法。
在一些实施例中，如图23所示，装置500还可以包括存储器520。其中，处理器510可以从存储器520中调用并运行计算机程序，以实现本申请实施例中的方法。
其中，存储器520可以是独立于处理器510的一个单独的器件，也可以集成在处理器510中。
在一些实施例中，该装置500还可以包括输入接口530。其中，处理器510可以控制该输入接口530与其他设备或芯片进行通信，具体地，可以获取其他设备或芯片发送的信息或数据。可选地，处理器510可以位于芯片内或芯片外。
在一些实施例中，处理器510可以实现终端设备中的处理单元的功能，为了简洁，在此不再赘述。
在一些实施例中，输入接口530可以实现终端设备中的通信单元的功能。
在一些实施例中，该装置500还可以包括输出接口540。其中，处理器510可以控制该输出接口540与其他设备或芯片进行通信，具体地，可以向其他设备或芯片输出信息或数据。可选地，处理器510可以位于芯片内或芯片外。
在一些实施例中，输出接口540可以实现终端设备中的通信单元的功能。
在一些实施例中，该装置可应用于本申请实施例中的终端设备，并且该装置可以实现本申请实施例的各个方法中由第一终端实现的相应流程，为了简洁，在此不再赘述。
在一些实施例中，本申请实施例提到的装置也可以是芯片。例如可以是系统级芯片，系统芯片，芯片系统或片上系统芯片等。
图24是本申请实施例提供的一种通信系统600的示意性框图。如图24所示，该通信系统600包括第一终端610和第二终端620。
其中，该第一终端610可以用于实现上述方法中由第一终端实现的相应的功能，以及该第二终端620可以用于实现上述方法中由第二终端实现的相应的功能，为了简洁，在此不再赘述。
应理解，本申请实施例的处理器可能是一种集成电路芯片，具有信号的处理能力。在实现过程中，上述方法实施例的各步骤可以通过处理器中的硬件的集成逻辑电路或者软件形式的指令完成。上述的处理器可以是通用处理器、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。可以实现或者执行本申请实施例中的公开的各方法、步骤及逻辑框图。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。结合本申请实施例所公开的方法的步骤可以直接体现为硬件译码处理器执行完成，或者用译码处理器中的硬件及软件模块组合执行完成。软件模块可以位于随机存储器，闪存、只读存储器，可编程只读存储器或者电可擦写可编程存储器、寄存器等本领域成熟的存储介质中。该存储介质位于存储器，处理器读取存储器中的信息，结合其硬件完成上述方法的步骤。
可以理解，本申请实施例中的存储器可以是易失性存储器或非易失性存储器，或可包括易失性和非易失性存储器两者。其中，非易失性存储器可以是只读存储器(Read-Only Memory，ROM)、可编程只读存储器(Programmable ROM，PROM)、可擦除可编程只读存储器(Erasable PROM，EPROM)、电可擦除可编程只读存储器(Electrically EPROM，EEPROM)或闪存。易失性存储器可以是随机存取存储器(Random Access Memory，RAM)，其用作外部高速缓存。通过示例性但不是限制性说明，许多形式的RAM可用，例如静态随机存取存储器(Static RAM，SRAM)、动态随机存取存储器(Dynamic RAM，DRAM)、同步动态随机存取存储器(Synchronous DRAM，SDRAM)、双倍数据速率同步动态随机存取存储器(Double Data Rate SDRAM，DDR SDRAM)、增强型同步动态随机存取存储器(Enhanced SDRAM，ESDRAM)、同步连接动态随机存取存储器(Synchlink DRAM，SLDRAM)和直接内存总线随机存取存储器(Direct Rambus RAM，DR RAM)。应注意，本文描述的系统和方法的存储器旨在包括但不限于这些和任意其它适合类型的存储器。
应理解，上述存储器为示例性但不是限制性说明，例如，本申请实施例中的存储器还可以是静态随机存取存储器(static RAM，SRAM)、动态随机存取存储器(dynamic RAM，DRAM)、同步动态随机存取存储器(synchronous DRAM，SDRAM)、双倍数据速率同步动态随机存取存储器(double data rate SDRAM，DDR SDRAM)、增强型同步动态随机存取存储器(enhanced SDRAM，ESDRAM)、同步连接动态随机存取存储器(synch link DRAM，SLDRAM)以及直接内存总线随机存取存储器(Direct Rambus RAM，DR RAM)等等。也就是说，本申请实施例中的存储器旨在包括但不限于这些和任意其它适合类型的存储器。
本申请实施例还提供了一种计算机可读存储介质，用于存储计算机程序。
在一些实施例中，该计算机可读存储介质可应用于本申请实施例中的终端设备，并且该计算机程序使得计算机执行本申请实施例的各个方法中由第一终端实现的相应流程，为了简洁，在此不再赘述。
本申请实施例还提供了一种计算机程序产品，包括计算机程序指令。
在一些实施例中，该计算机程序产品可应用于本申请实施例中的终端设备，并且该计算机程序指令使得计算机执行本申请实施例的各个方法中由第一终端实现的相应流程，为了简洁，在此不再赘述。
本申请实施例还提供了一种计算机程序。
在一些实施例中，该计算机程序可应用于本申请实施例中的终端设备，当该计算机程序在计算机上运行时，使得计算机执行本申请实施例的各个方法中由第一终端实现的相应流程，为了简洁，在此不再赘述。
本领域普通技术人员可以意识到，结合本文中所公开的实施例描述的各示例的单元及算法步骤，能够以电子硬件、或者计算机软件和电子硬件的结合来实现。这些功能究竟以硬件还是软件方式来执行，取决于技术方案的特定应用和设计约束条件。专业技术人员可以对每个特定的应用来使用不同方法来实现所描述的功能，但是这种实现不应认为超出本申请的范围。
所属领域的技术人员可以清楚地了解到，为描述的方便和简洁，上述描述的系统、装置和单元的具体工作过程，可以参考前述方法实施例中的对应过程，在此不再赘述。
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。
所述功能如果以软件功能单元的形式实现并作为独立的产品销售或使用时，可以存储在一个计算 机可读取存储介质中。针对这样的理解，本申请的技术方案本质上或者说对现有技术做出贡献的部分或者该技术方案的部分可以以软件产品的形式体现出来，该计算机软件产品存储在一个存储介质中，包括若干指令用以使得一台计算机设备(可以是个人计算机，服务器，或者网络设备等)执行本申请各个实施例所述方法的全部或部分步骤。而前述的存储介质包括：U盘、移动硬盘、只读存储器(Read-Only Memory，ROM)、随机存取存储器(Random Access Memory，RAM)、磁碟或者光盘等各种可以存储程序代码的介质。
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所述以权利要求的保护范围为准。

Claims (42)

  1. 一种无线通信的方法，其特征在于，包括：
    在满足第一条件的情况下，第一终端在第一固定帧周期FFP内进行侧行传输；
    其中，所述第一条件包括以下至少之一：
    所述第一终端在所述第一FFP之前执行的信道侦听结果为空闲，所述第一终端在所述第一FFP内的传输资源之前检测到了其他终端的侧行传输，所述第一终端在所述第一FFP内的传输资源之前检测到了其他终端的信道占用时间COT共享信息，所述第一终端为在所述第一FFP的起始位置发起信道占用的终端的目标接收终端，所述第一终端为在所述第一FFP内发送COT共享信息的终端的目标接收终端，所述第一终端的侧行传输的目标接收端包括在所述第一FFP的起始位置发起信道占用的终端，所述第一终端的侧行传输的目标接收端包括在所述第一FFP内发送COT共享信息的终端，所述第一终端的侧行传输的结束位置位于所述第一FFP内的空闲时间的起始位置之前。
  2. 如权利要求1所述的方法，其特征在于，
    所述第一终端在所述第一FFP内的传输资源的起始位置位于所述第一FFP的起始位置之后。
  3. 如权利要求1或2所述的方法，其特征在于，在所述第一条件至少包括所述第一终端在所述第一FFP内的传输资源之前检测到了其他终端的侧行传输的情况下，所述第一终端检测到的其他终端的侧行传输包括以下至少之一：物理侧行共享信道PSSCH，物理侧行控制信道PSCCH，物理侧行反馈信道PSFCH，侧行同步信号块S-SSB，侧行控制信息SCI。
  4. 如权利要求1或2所述的方法，其特征在于，
    在所述第一条件至少包括所述第一终端在所述第一FFP之前执行的信道侦听结果为空闲，且在满足所述第一条件的情况下，所述第一终端在第一FFP内进行侧行传输，包括：
    所述第一终端在所述第一FFP的起始位置开始进行侧行传输。
  5. 如权利要求4所述的方法，其特征在于，
    所述第一终端在所述第一FFP的起始位置开始进行的侧行传输的时长基于以下至少之一确定：预配置信息，网络配置信息，资源池配置信息，侧行带宽部分BWP配置信息，半静态信道接入配置信息，一个正交频分复用OFDM符号对应的时长，信道接入优先级信息或侧行优先级信息；或者，
    所述第一终端在所述第一FFP的起始位置开始进行的侧行传输的时长基于所述第一FFP内的第一个时隙中可用于侧行传输的OFDM符号对应的时长确定；或者，
    所述第一终端在所述第一FFP的起始位置开始进行的侧行传输的时长基于所述第一FFP内的第一个时隙中可用于PSSCH传输的OFDM符号对应的时长确定。
  6. 如权利要求5所述的方法，其特征在于，
    在所述第一终端在所述第一FFP的起始位置开始进行的侧行传输的时长基于一个OFDM符号对应的时长确定的情况下，所述第一终端在所述第一FFP的起始位置开始进行的侧行传输的时长不超过一个OFDM符号对应的时长。
  7. 如权利要求6所述的方法，其特征在于，
    所述第一终端在所述第一FFP的起始位置开始进行的侧行传输的时长基于以下公式确定：
    T 1＝S×T 2；
    其中，T 1表示所述第一终端在所述第一FFP的起始位置开始进行的侧行传输的时长，T 2表示一个OFDM符号对应的时长，0＜S≤1。
  8. 如权利要求7所述的方法，其特征在于，
    S的取值基于资源池配置信息确定，或者，S的取值基于侧行BWP配置信息确定，或者，S的取值基于半静态信道接入配置信息确定，或者，S的取值基于协议预定义信息确定。
  9. 如权利要求4至8中任一项所述的方法，其特征在于，
    所述第一终端在所述第一FFP的起始位置开始进行的侧行传输对应的传输资源为在所述第一FFP内的第一个时隙中随机选取的传输资源，或者，所述第一终端在所述第一FFP的起始位置开始进行的侧行传输对应的传输资源为所述第一FFP内的第一个时隙中的部分或全部公共传输资源。
  10. 如权利要求9所述的方法，其特征在于，
    所述公共传输资源的大小基于PSSCH的频域资源粒度确定。
  11. 如权利要求10所述的方法，其特征在于，
    在PSSCH的频域资源粒度为基于梳齿资源块IRB的频域资源粒度的情况下，所述公共传输资源对应一个或多个梳齿资源；或者，
    在PSSCH的频域资源粒度为基于连续物理资源块PRB的频域资源粒度的情况下，所述公共传输资源对应一个或多个子信道。
  12. 如权利要求9所述的方法，其特征在于，所述公共传输资源包括一组频域连续的PRB或两组频域连续的PRB，其中，每组频域连续的PRB包括至少一个PRB。
  13. 如权利要求12所述的方法，其特征在于，
    在所述公共传输资源包括两组频域连续的PRB的情况下，一组频域连续的PRB包括具有最低索引的PRB，另一组频域连续的PRB包括具有最高索引的PRB。
  14. 如权利要求9至13中任一项所述的方法，其特征在于，
    所述公共传输资源的频域大小和/或频域位置基于以下至少之一确定：
    预配置信息，网络配置信息，资源池配置信息，侧行BWP配置信息，半静态信道接入配置信息。
  15. 如权利要求9至14中任一项所述的方法，其特征在于，
    在所述第一终端在所述第一FFP的起始位置开始进行的侧行传输对应的传输资源为所述第一FFP内的第一个时隙中的部分或全部公共传输资源的情况下，其他终端在进行资源选取时，排除与所述公共传输资源存在重叠的传输资源。
  16. 如权利要求4至15中任一项所述的方法，其特征在于，
    所述第一终端为在所述第一FFP内选取或预留了传输资源的终端，或者，所述第一终端在所述第一FFP内由网络设备分配了传输资源的终端，或者，所述第一终端为在所述第一FFP内的第一时间窗内选取或预留了传输资源的终端，或者，所述第一终端为在所述第一FFP内的第一时间窗内由网络设备分配了传输资源的终端，或者，所述第一终端为任意一个终端。
  17. 如权利要求16所述的方法，其特征在于，所述第一时间窗的位置和/或长度由协议约定，或者，所述第一时间窗的位置和/或长度由预配置信息确定，或者，所述第一时间窗的位置和/或长度由网络设备配置信息确定。
  18. 如权利要求16或17所述的方法，其特征在于，
    所述第一时间窗的长度基于第一时长确定，其中，所述第一时长的取值与子载波间隔的大小关联。
  19. 如权利要求18所述的方法，其特征在于，所述第一时长由以下至少之一确定：PSCCH的检测时间，COT共享信息的检测时间，侧行同步信号的检测时间，PSFCH信道的检测时间。
  20. 如权利要求16至19中任一项所述的方法，其特征在于，
    所述第一时间窗的起始位置与所述第一FFP的起始位置相同。
  21. 如权利要求4至20中任一项所述的方法，其特征在于，所述第一终端在所述第一FFP之前执行的信道侦听为在所述第一FFP之前的空闲时间内进行的，或者，所述第一终端在所述第一FFP之前执行的信道侦听为在所述第一FFP之前的第一侦听时长内进行的。
  22. 如权利要求21所述的方法，其特征在于，所述第一侦听时长等于9微秒或16微秒。
  23. 如权利要求1至22中任一项所述的方法，其特征在于，
    若所述第一终端在所述第一FFP内选取或预留了传输资源，且所述第一终端在所述第一FFP内选取或预留的传输资源的起始位置位于所述第一FFP的起始位置之后，所述方法还包括：
    若第一侧行传输与前一个侧行传输之间的时间间隔小于或等于第二时长，所述第一终端直接进行所述第一侧行传输，且无需执行信道侦听；和/或，
    若第一侧行传输与前一个侧行传输之间的时间间隔大于第二时长，所述第一终端执行第一侦听时长的信道侦听；以及在所述第一侦听时长的信道侦听结果为空闲的情况下，所述第一终端执行所述第一侧行传输，否则，所述第一终端忽略或放弃所述第一侧行传输；
    其中，所述第一侧行传输为所述第一终端在所述第一FFP内选取或预留的传输资源上执行的侧行传输，所述第一侧行传输的前一个侧行传输为所述第一FFP内执行的一个侧行传输。
  24. 如权利要求23所述的方法，其特征在于，
    所述第一侧行传输的前一个侧行传输由所述第一终端执行，或者，所述第一侧行传输的前一个侧行传输由其他终端执行。
  25. 如权利要求23或24所述的方法，其特征在于，
    所述第一终端执行第一侦听时长的信道侦听，包括：
    所述第一终端在第三时长内执行第一侦听时长的信道侦听。
  26. 如权利要求25所述的方法，其特征在于，所述第三时长等于25微秒。
  27. 如权利要求23至26中任一项所述的方法，其特征在于，
    所述第一侦听时长小于或等于所述第二时长。
  28. 如权利要求21至27中任一项所述的方法，其特征在于，
    所述第一侦听时长基于以下之一确定：类型2A信道接入所对应的侦听时长，类型2B信道接入所对应的侦听时长，类型2C信道接入所对应的侦听时长，一个侦听时隙对应的时长。
  29. 如权利要求21至28中任一项所述的方法，其特征在于，所述第一侦听时长由协议约定，或者，所述第一侦听时长由网络设备配置，或者，所述第一侦听时长由第二终端指示，或者，所述第一侦听时长为从资源池配置信息中获取的，或者，所述第一侦听时长为从侧行BWP配置信息中获取的，或者，所述第一侦听时长为从半静态信道接入配置信息中获取的。
  30. 如权利要求29所述的方法，其特征在于，所述第二终端为在所述第一FFP的起始位置进行侧行传输的终端。
  31. 如权利要求1至30中任一项所述的方法，其特征在于，所述方法还包括：
    所述第一终端在确定候选传输资源集合时，若第一传输资源与所述第一FFP内的空闲时间存在重叠，所述第一终端从所述候选传输资源集合中排除所述第一传输资源；
    其中，所述第一传输资源包括以下至少之一：
    用于传输PSCCH的传输资源，用于传输PSSCH的传输资源。
  32. 如权利要求1至31中任一项所述的方法，其特征在于，所述方法还包括：
    所述第一终端在确定候选传输资源集合时，若与利用第二传输资源传输的PSSCH相关联的PSFCH的传输资源与所述第一FFP内的空闲时间存在重叠，所述第一终端从所述候选传输资源集合中排除所述第二传输资源。
  33. 如权利要求1至32中任一项所述的方法，其特征在于：所述方法还包括：
    若与利用第三传输资源传输的PSSCH相关联的PSFCH的传输资源与所述第一FFP内的空闲时间存在重叠，所述第一终端重新进行资源选取，或者，所述第一终端丢弃或忽略利用所述第三传输资源进行的PSSCH传输。
  34. 如权利要求1至33中任一项所述的方法，其特征在于，所述方法还包括：
    所述第一终端在候选传输资源集合中选取传输资源时，优先选取所述第一FFP内的第一个时隙上的传输资源。
  35. 如权利要求1至34中任一项所述的方法，其特征在于，所述方法还包括：
    所述第一终端接收第一配置信息，其中，所述第一配置信息用于指示半静态信道接入方式，或者，所述第一配置信息用于指示利用半静态信道接入方式进行信道接入。
  36. 如权利要求1至35中任一项所述的方法，其特征在于，所述方法还包括：
    所述第一终端接收第二配置信息，其中，所述第二配置信息包括半静态信道接入配置参数；
    所述第一终端根据所述第二配置信息确定以下信息中的至少之一：FFP的周期信息，FFP的起始位置，FFP内的空闲时间的长度，FFP内的最大信道占用时长。
  37. 一种终端设备，其特征在于，所述终端设备为第一终端，所述终端设备包括：通信单元；
    在满足第一条件的情况下，所述通信单元用于在第一固定帧周期FFP内进行侧行传输；
    其中，所述第一条件包括以下至少之一：
    所述第一终端在所述第一FFP之前执行的信道侦听结果为空闲，所述第一终端在所述第一FFP内的传输资源之前检测到了其他终端的侧行传输，所述第一终端在所述第一FFP内的传输资源之前检测到了其他终端的信道占用时间COT共享信息，所述第一终端为在所述第一FFP的起始位置发起信道占用的终端的目标接收终端，所述第一终端为在所述第一FFP内发送COT共享信息的终端的目标接收终端，所述第一终端的侧行传输的目标接收端包括在所述第一FFP的起始位置发起信道占用的终端，所述第一终端的侧行传输的目标接收端包括在所述第一FFP内发送COT共享信息的终端，所述第一终端的侧行传输的结束位置位于所述第一FFP内的空闲时间的起始位置之前。
  38. 一种终端设备，其特征在于，包括：处理器和存储器，所述存储器用于存储计算机程序，所述处理器用于调用并运行所述存储器中存储的计算机程序，使得所述终端设备执行如权利要求1至36中任一项所述的方法。
  39. 一种芯片，其特征在于，包括：处理器，用于从存储器中调用并运行计算机程序，使得安装有所述芯片的设备执行如权利要求1至36中任一项所述的方法。
  40. 一种计算机可读存储介质，其特征在于，用于存储计算机程序，当所述计算机程序被执行时，如权利要求1至36中任一项所述的方法被实现。
  41. 一种计算机程序产品，其特征在于，包括计算机程序指令，当所述计算机程序指令被执行时，如权利要求1至36中任一项所述的方法被实现。
  42. 一种计算机程序，其特征在于，当所述计算机程序被执行时，如权利要求1至36中任一项所述的方法被实现。
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