WO2023115275A1 - 一种共享信道占用时间的方法及其终端设备 - Google Patents

一种共享信道占用时间的方法及其终端设备 Download PDF

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Publication number
WO2023115275A1
WO2023115275A1 PCT/CN2021/139763 CN2021139763W WO2023115275A1 WO 2023115275 A1 WO2023115275 A1 WO 2023115275A1 CN 2021139763 W CN2021139763 W CN 2021139763W WO 2023115275 A1 WO2023115275 A1 WO 2023115275A1
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Prior art keywords
terminal device
lbt
resource
indicated
channel
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PCT/CN2021/139763
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English (en)
French (fr)
Inventor
丁伊
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Oppo广东移动通信有限公司
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Application filed by Oppo广东移动通信有限公司 filed Critical Oppo广东移动通信有限公司
Priority to PCT/CN2021/139763 priority Critical patent/WO2023115275A1/zh
Priority to CN202180103345.8A priority patent/CN118104379A/zh
Publication of WO2023115275A1 publication Critical patent/WO2023115275A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA

Definitions

  • the present invention relates to the technical field of communications, in particular to the technical field of sidelink transmission.
  • Sidelink transmission refers to direct transmission between terminal devices through a sidelink (Sidelink, SL), which is different from the way in which communication data is received or sent by a base station in a traditional cellular system.
  • the V2X (Vehicle to Everything, vehicle to other equipment) system also supports sidelink transmission, that is, the V2V (Vehicle to Vehicle, vehicle to vehicle) method. Therefore, sidelink transmission has higher spectral efficiency and lower transmission delay.
  • unlicensed spectrum a part of spectrum that can be shared by radio equipment communication
  • Communication equipment in different communication systems can use the spectrum as long as they meet the regulatory requirements set by the country or region on the spectrum, and do not need to apply for exclusive spectrum authorization from the government.
  • WIFI systems are deployed on unlicensed spectrum. Since the unlicensed spectrum can be used without government authorization, the LBT (Listen Before Talk) mechanism must be followed in the use of the unlicensed spectrum.
  • UE 1 communicates with UE 2
  • UE 3 communicates with UE 4.
  • UE 1 and UE 3 are far away from each other.
  • LBT process there is no way for each other to perceive that the other party is occupying the channel, and the monitoring is idle, so they both successfully access the channel.
  • UE 1 and UE 3 access the channel for transmission at the same time, the transmission of UE 3 will cause interference to the transmission from UE 1 to UE 2, resulting in a decrease in communication reliability.
  • the present invention provides a method for sharing channel occupation time and its terminal equipment, the method and its terminal equipment.
  • a method for sharing channel occupancy time includes a second terminal device receiving resource indication information sent by a first terminal device, and determining a transmission resource indicated by the first terminal device according to the resource indication information; the second terminal device The second terminal device performs listen-before-talk LBT according to the indicated transmission resource;
  • the second terminal device succeeds in LBT, share the channel occupancy time COT with the first terminal device.
  • a method for sharing a channel occupancy time which includes a first terminal device sending resource indication information for indicating transmission resources; the first terminal device obtaining the channel occupancy time COT shared by the second terminal device , the channel occupancy time is shared with the first terminal device after the second terminal device successfully performs listen-before-talk LBT according to the transmission resources indicated by the resource indication information; The COT shared by the second terminal device performs channel access.
  • a terminal device which is used to share the channel occupancy time; it includes a resource determination unit, configured to receive resource indication information sent by a first terminal device, and determine the resource indication information indicated by the first terminal device according to the resource indication information.
  • transmission resources a monitoring unit, configured to perform listen-before-talk LBT according to the indicated transmission resources; and a sharing unit, configured to share a channel occupancy time COT with the first terminal device if the monitoring unit LBT is successful.
  • a terminal device configured to receive shared channel occupation time; it includes: a sending unit, configured to send resource indication information, and the resource indication information is used to indicate transmission resources; an obtaining unit, configured to obtain the The channel occupancy time COT shared by the second terminal device, the channel occupancy time is shared with the sending unit after the second terminal device successfully performs listen-before-talk LBT according to the transmission resource indicated by the resource indication information ; an access unit, configured to perform channel access according to the COT shared by the second terminal device.
  • a terminal device for sharing channel occupancy time which includes: a processor, a memory, and a network interface; the processor invokes a program in the memory to execute any one of the method for sharing channel occupancy time of the present application A specific implementation manner, and the execution result is sent out through the network interface.
  • a chip which is characterized in that it includes: a processor, used to call and run a computer program from a memory, and a device installed with the chip executes any specific implementation of the method for sharing channel occupancy time of the present application Way.
  • a computer-readable storage medium wherein a program for an uplink transmission method is stored on the computer-readable storage medium, and the program for the uplink transmission method is executed by a processor according to any of the present application.
  • a specific embodiment of a method for sharing channel occupancy time is provided, wherein a program for an uplink transmission method is stored on the computer-readable storage medium, and the program for the uplink transmission method is executed by a processor according to any of the present application.
  • a computer program product is provided, wherein the computer program product is stored in a non-transitory computer-readable storage medium, and the computer program is executed to perform any specific method for sharing channel occupancy time of the present application. implementation.
  • a computer program is provided, wherein the computer program is executed to execute any specific embodiment of the method for sharing channel occupancy time of the present application.
  • the beneficial effect of the present invention is that the second terminal device performs LBT according to the transmission resource indicated by the first terminal device; if the second terminal device LBT succeeds, the obtained channel occupancy time COT is shared with the first terminal device, and the second terminal device A terminal device performs channel access according to the COT. In this way, the first terminal device and other terminal devices near the second terminal device will not form mutual hidden terminals, which solves the problem of hidden terminals and improves communication reliability.
  • FIG. 1A and FIG. 1B are system architecture diagrams of the application of the embodiment of the present application.
  • FIG. 2 is an application scenario of an embodiment of the present application.
  • FIG. 3 is a schematic flowchart of a method for sharing channel occupancy time provided in Embodiment 1 of the present application.
  • FIG. 4 is a schematic diagram of a base station sharing a COT and applying different channel access schemes in different scenarios.
  • FIG. 5 is a specific example of Embodiment 1 of the present application.
  • FIG. 6 is a schematic diagram of modules of a terminal device provided in Embodiment 2 of the present application.
  • FIG. 7 is a schematic diagram of modules of a terminal device provided in Embodiment 3 of the present application.
  • FIG. 8 is a schematic structural diagram of a terminal device provided in Embodiment 4 of the present application.
  • Embodiments of the present application can be applied to various communication systems, such as: Global System of Mobile communication (GSM) system, Code Division Multiple Access (CDMA) system, Wideband Code Division Multiple Access (Wideband Code Division Multiple Access (WCDMA) system, General Packet Radio Service (GPRS), Long Term Evolution (LTE) system, Advanced long term evolution (LTE-A) system, new wireless (New Radio, NR) system, evolution system of NR system, LTE (LTE-based access to unlicensed spectrum, LTE-U) system on unlicensed spectrum, NR (NR-based access to unlicensed spectrum, NR-U) system, Universal Mobile Telecommunication System (UMTS), Wireless Local Area Networks (WLAN), Wireless Fidelity (WiFi), next generation communication system or other communication systems, etc.
  • GSM Global System of Mobile communication
  • CDMA Code Division Multiple Access
  • WCDMA Wideband Code Division Multiple Access
  • GPRS General Packet Radio Service
  • LTE Long Term Evolution
  • LTE-A Advanced long term evolution
  • the communication system in the embodiment of the present application may be applied to a carrier aggregation (Carrier Aggregation, CA) scenario, may also be applied to a dual connectivity (Dual Connectivity, DC) scenario, and may also be applied to an independent (Standalone, SA) deployment Web scene.
  • Carrier Aggregation, CA Carrier Aggregation
  • DC Dual Connectivity
  • SA independent deployment Web scene
  • the embodiment of the present application does not limit the applied frequency spectrum.
  • the embodiments of the present application may be applied to licensed spectrum, and may also be applied to unlicensed spectrum.
  • FIGS. 1A and 1B illustrate a wireless communication system 100 applied in the embodiment of the present application.
  • the wireless communication system 100 is a sidelink transmission system.
  • 3GPP 3rd Generation Partnership Project, 3rd Generation Partnership Project
  • Mode A 3rd Generation Partnership Project
  • Mode B 3rd Generation Partnership Project
  • the terminal device 120 is a side link terminal device SL UE, and its transmission resources are allocated by the network device 110, and the terminal device 120 performs transmission on the side link according to the resources allocated by the network device 110.
  • Sending of data; the network device 110 may allocate resources for a single transmission to the terminal device 120 , and may also allocate resources for semi-static transmission to the terminal device 120 .
  • Mode B As shown in FIG. 1B , the terminal device 120 selects at least one resource from the resource pool for data transmission. Specifically, the terminal device 120 may select transmission resources from the resource pool by listening, or select transmission resources from the resource pool by random selection.
  • the terminal device 120 can be either a terminal device in D2D (Device to Device, terminal to terminal) or a vehicle terminal in the Internet of Vehicles.
  • D2D Device to Device, terminal to terminal
  • vehicle terminal in the Internet of Vehicles.
  • the wireless communication system 100 may include multiple network devices, and the coverage of each network device may include other numbers of user equipments, which is not limited in this embodiment of the present application.
  • the network device 110 may provide communication coverage for a specific geographic area, and may communicate with user equipment (such as UE) located in the coverage area.
  • the network device 110 may be a base station (Base Transceiver Station, BTS) in a GSM system or a CDMA system, may also be a base station (NodeB, NB) in a WCDMA system, or may be an evolved base station in an LTE system (Evolutional Node B, eNB or eNodeB), or a wireless controller in a cloud radio access network (Cloud Radio Access Network, CRAN), or the network device can be a relay station, an access point, a vehicle device, a wearable device, The network side equipment in the 5G network or the network equipment in the future evolution of the public land mobile network (Public Land Mobile Network, PLMN), etc.
  • BTS Base Transceiver Station
  • NodeB, NB base station
  • NB evolved base station in an LTE system
  • LTE Long Term Evolutional Node B, eNB or
  • the terminal device 120 may be mobile or fixed.
  • the user equipment 120 may refer to an access terminal, a user equipment (User Equipment, UE), a subscriber unit, a subscriber station, a mobile station, a mobile station, a remote station, a remote terminal, a mobile device, a user equipment, a terminal, a wireless Communication Device, User Agent, or User Device.
  • UE User Equipment
  • the access terminal can be a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA), a wireless communication Functional handheld devices, computing devices or other processing devices connected to wireless modems, vehicle-mounted devices, wearable devices, user equipment in 5G networks or user equipment in future evolved PLMNs, etc.
  • SIP Session Initiation Protocol
  • WLL Wireless Local Loop
  • PDA Personal Digital Assistant
  • FIG. 3 shows a method for sharing channel occupancy time provided by Embodiment 1 of the present application.
  • the method includes:
  • the first terminal device sends resource indication information used to indicate transmission resources
  • the second terminal device receives the resource indication information sent by the first terminal device, and determines the transmission resource indicated by the first terminal device according to the resource indication information;
  • the second terminal device performs listen-before-speak LBT according to the transmission resource, and if the LBT is successful, obtains a COT (Channel Occupancy Time) and shares the COT with the first terminal device;
  • COT Channel Occupancy Time
  • the first terminal device performs channel access according to the COT shared by the second terminal device.
  • FIG. 2 is an application scenario of Embodiment 1 of the present application.
  • the first terminal equipment UE1 communicates with the second terminal equipment UE2, UE1 sends information or data to UE2;
  • the third terminal equipment UE3 communicates with the fourth terminal equipment UE4 , UE3 sends information or data to UE4.
  • UE 1 and UE 3 are far away from each other, and they have no way to perceive that the other party is occupying the channel during the LBT process.
  • UE1 and UE3 perform LBT respectively, and both listeners are idle, they will both successfully access the channel. However, when UE 1 and UE 3 access the channel at the same time for transmission, the transmission of UE 3 will cause interference to the transmission from UE 1 to UE 2, resulting in a decrease in communication reliability.
  • UE2 performs LBT monitoring. Since UE2 and UE3 are relatively close, they can know that the other party is occupying the channel, so there will be no mutual concealment. Therefore, the technical problem that UE1 and UE3 are mutually concealed terminals is solved, and the technical effect of improving communication reliability is achieved.
  • the LBT is a Type 1 LBT.
  • the first terminal device sends resource indication information for indicating transmission resources, including: the first terminal device indicates the transmission resources through sidelink control information SCI. That is, the indicated transmission resource includes: the transmission resource indicated by the first terminal device through sidelink control information SCI (SidelinkControlInformation).
  • the indicated transmission resource includes: the transmission resource indicated by the first terminal device through the SCI for the same data transmission block TB; and/or, the transmission resource indicated by the first terminal device through the SCI for a different TB (Transport Block, transmission block) transmission resources.
  • the SCI includes a first SCI or a second SCI; wherein, the first SCI is carried in a physical sidelink control channel PSCCH; and the second SCI information is carried in a physical sidelink shared channel PSSCH.
  • the transmission resources indicated by the first terminal device are time-frequency resources.
  • LBT mechanisms include two types:
  • the communication device first monitors the channel within the Td time period, and after monitoring that all the monitoring time slots in this time period are idle, and after N in the following steps is equal to 0, the LBT is successful and the communication device can occupy channel to send data. Otherwise the communication device cannot access the channel or continues to attempt to access the channel.
  • Step 3 Continue to monitor the channel for one listening time slot, if it is idle, go to step 4, otherwise go to step 5;
  • Step 5 Continue to monitor the channel until it is detected that a monitoring time slot is busy within the time period of Td, or all the monitoring time slots within the time period of Td are detected to be idle.
  • Step 6 If all listening time slots are idle within the time period of Td, go to step 4, otherwise go to step 5.
  • the above steps, if no jump is indicated, will be executed sequentially.
  • the aforementioned listening time slot is marked as Tsl, and Tsl is 9 microseconds.
  • Ninit is a random value from 0 to CWp.
  • CWp is related to the priority of the communication device to access the channel.
  • the CWp can also be called a contention window corresponding to a specific priority or a contention window determined according to a priority.
  • the communication device determines the values of CWmin,p, CWmax,p and allowed CWp according to the priority of the access channel, that is, determines the minimum value, maximum value and possible values of the contention window according to the priority. For example, in Table 1, when the priority of the communication device accessing the channel is 3, the minimum, maximum and possible values of the contention window used by it are 15, 1023 and ⁇ 15, 31, 63, 127, 255, 511, 1023 ⁇ .
  • the communication device maintains the size of the corresponding contention window for each priority, adjusts the contention window corresponding to each priority according to certain rules before each execution of the above step 1, and then accesses the Determine the priority of the competition window used when executing LBT this time, thereby determining Ninit.
  • the communication device maintains CW1, CW2, CW3, and CW4.
  • the communication device executes type 1 LBT, before performing the above step 1, the communication device increases CW1, CW2, CW3, and CW4 to the next larger allowable value.
  • the communication device uses the adjusted CW1 to perform the type 1 LBT this time.
  • Td Tf+mp*Tsl
  • Tf 16 microseconds
  • mp is related to the priority of channel access.
  • the corresponding mp may be determined from Table 1 according to the priority.
  • the communication device After the communication device performs the above steps and the LBT is successful, if the communication device does not access the channel immediately, when it needs to send data to access the channel, it does not need to perform all the above-mentioned type 1 LBT processes again, only need to monitor Td + at least one Tsl The channel occupancy in the time period, if it is free, you can directly access the channel to send signals.
  • COT Channel Occupancy Time
  • the communication device can transmit continuously or discontinuously, but the total transmission time does not exceed Tmcot,p .
  • Tmcot,p is related to the priority of channel access, for example, it can be found from Table 1.
  • Type 2 LBT only requires the communication device to monitor a fixed-length channel, and if the monitoring time slot is idle within the fixed length, the communication device can directly access the channel.
  • type 2 is divided into three subtypes: 2A, 2B, and 2C:
  • Type 2A The communication device can monitor a channel with a length of 25 microseconds (denoted as Tshort). If the monitoring time slots in Tshort are all idle, the communication device can directly access the channel.
  • Type 2B The communication device can monitor a channel with a length of 16 microseconds (denoted as Tf). If the monitoring time slot in Tf is free, the communication device can directly access the channel
  • Type 2C (Type 2C): The communication device can directly access the channel without LBT. This type can only be applied when the interval between this transmission and the previous transmission is less than or equal to 16 microseconds. At the same time, the length of this transmission does not exceed 584 microseconds. For example: the above criteria for judging that the monitoring time slot is busy is that 4us is busy in 9us. Otherwise, it is judged that the listening time slot is idle. Alternatively, the above criterion for judging busyness is that the detected energy or power is greater than or equal to a certain threshold
  • the second terminal device LBT when it accesses the channel, it only needs to monitor the channel occupancy within Td+at least one Tsl time period, If it is idle, it can directly access the channel and share the COT with the first terminal device.
  • the second terminal device performs listen-before-talk LBT according to the transmission resource, and if the LBT is successful, obtains a channel occupancy time COT, and shares the COT with the first terminal device, including:
  • the second terminal device shares the COT with the first terminal device through a physical sidelink control channel PSCCH or a physical sidelink shared channel PSSCH or a physical sidelink feedback channel PSFCH.
  • the communication device After the LBT is successful, the communication device also supports sharing the obtained COT with other communication devices.
  • the channel access types used in different COT sharing scenarios are also different. Please refer to FIG. 4 , which takes COT sharing at the base station side as an example.
  • the base station shares its COT to the terminal equipment.
  • An uplink transmission opportunity occurs within the COT obtained by the base station. If the gap between the start position of the uplink transmission opportunity and the end position of the downlink transmission opportunity is less than or equal to 16 ⁇ s, the terminal device can perform a Type 2C channel connection before the uplink transmission.
  • the terminal equipment UE can perform Type2B channel access before the uplink transmission; if the start of the uplink transmission opportunity If the gap between the start position and the end position of the downlink transmission opportunity is equal to or greater than 25 ⁇ s, the UE can perform Type 2A channel access before the uplink transmission.
  • the COT obtained by the base station may include multiple uplink and downlink conversion points. After the base station shares the COT obtained by itself with the UE for uplink transmission, the base station can also use the Type2 channel access method such as the Type2A channel access method to perform channel monitoring in the COT, and restart the downlink transmission after the channel monitoring is successful.
  • the second terminal device also performs at least one of the following while instructing the first terminal device to share the COT:
  • measurement results include but are not limited to: at least one of SL-RSRP (Sidelink Reference Signal Received Power, sidelink reference signal received power), CSI (Channel State information, channel state information);
  • SL-RSRP Sidelink Reference Signal Received Power, sidelink reference signal received power
  • CSI Channel State information, channel state information
  • Indicating the type of the LBT to the first terminal device for example, type Type2A, Type2B or Type2C;
  • the channel access priority is indicated to the first terminal device.
  • the second terminal device is a receiving end of the first terminal device, or, the second terminal device is a group head terminal device.
  • the group head terminal is a terminal performing scheduling in a group of terminals.
  • the performing LBT by the second terminal device according to the indicated transmission resource includes: performing LBT by the second terminal device according to at least one of the indicated transmission resources.
  • the second terminal device performs LBT according to the transmission resource corresponding to the next transmission indicated by the first terminal device; or, the second terminal device performs LBT according to the transmission resource for the same TB indicated by the first terminal device, Wherein, the transmission resource used for the same TB does not include the transmission resource used for indication.
  • performing LBT according to the indicated transmission resource by the second terminal device further includes: performing LBT by the second terminal device on the resource block set RB set (Resource Block Set, resource block set) where the indicated transmission resource is located and/or, the second terminal device performs LBT before the time slot where the indicated transmission resource is located.
  • resource block set RB set Resource Block Set, resource block set
  • LBT starts R timeslots before the time slot where the indicated transmission resource is located;
  • R can be determined by any of the following methods: network configuration, pre-configuration, depending on the implementation of the terminal equipment, and specified by the standard default value, or set R to 1.
  • RB Set means that in the unlicensed spectrum system, the frequency domain resources on the carrier are divided into several resource block sets, and guard frequency bands are configured between the resource block sets.
  • an RB set corresponds to a frequency domain width of 20MHz.
  • the granularity of LBT performed by the communication device is an RB set, so an RB set can also be called an LBT subband. That is, if the communication device wants to send data on a certain RB set, it needs to perform LBT on the RB set, and transmit after the LBT is successful.
  • the second terminal determines the shared COT transmission resource according to the indicated transmission resource, and performs LBT before the shared COT transmission resource.
  • the second terminal may transmit sharing indication information through the PSCCH, PSSCH, or PSFCH, where the sharing indication information is used to indicate COT sharing.
  • the second terminal may be transmitted through a physical sidelink control channel PSCCH (Physical Sidelink Control Channel), a physical sidelink shared channel PSSCH (Physical Sidelink Shared Channel), or a physical sidelink feedback channel PSFCH (Physical Sidelink Feedback Channel) The sharing instructions.
  • PSCCH Physical Sidelink Control Channel
  • PSSCH Physical Sidelink Shared Channel
  • PSFCH Physical Sidelink Feedback Channel
  • the PSCCH or the PSSCH or the PSFCH meets one of the following conditions:
  • the PSCCH or PSSCH is the PSCCH or PSSCH in the previous time slot of the indicated transmission resource or in the previous time slot belonging to the resource pool; or, the PSFCH is in the last time slot configured with PSFCH before the indicated transmission resource PSFCH, or PSFCH in the last time slot configured with PSFCH belonging to the resource pool; and/or,
  • the PSCCH or the PSSCH or the PSFCH and the indicated transmission resource are located in the same resource block set RB Set.
  • the resource pool is the resource pool of the first terminal device or the resource pool of the second terminal device.
  • the resource pool is the resource pool of the first terminal device or the resource pool of the second terminal device.
  • the resource pool may be a sending resource pool or a receiving resource pool.
  • the first terminal device performs channel access according to the COT shared by the second terminal device, including:
  • the first terminal device receives the sharing indication information of the shared COT of the second terminal device, use the second type of LBT to perform channel access; and/or,
  • the first terminal device does not receive the COT sharing instruction information of the second terminal device, use the first type of LBT for channel access, or do not perform LBT.
  • the first terminal device performs channel access according to the COT shared by the second terminal device, including:
  • the first terminal device determines to use the first type of LBT for channel access, or uses the second type of LBT for channel access, or does not perform channel access according to the sharing indication information of the shared COT of the second terminal device. LBT.
  • FIG. 5 is a specific example of an implementation manner of the present application.
  • sidelink transmission is performed between the first terminal equipment UE1 and the second terminal equipment UE2.
  • UE1 sends sideline control information SCI to UE2, and transmits data to UE2.
  • UE2 shares the COT with UE1.
  • the horizontal axis t in the figure is the time domain, and the vertical axis f is the frequency domain.
  • This example includes two resource block sets RBSet 1 and RBSet 2. Both RBSet1 and RBSet2 include PSFCH 710, PSSCH720, and PSCCH730. Among them, UE 2 is the receiving end of UE 1, or UE 2 is the group head terminal.
  • UE 1 sends PSCCH and PSSCH in time slot n, and uses the first sidelink control information SCI in the PSCCH to indicate the time-frequency resources of time slots n, n+b and n+c.
  • the above three resources are used for the transmission of the same TB.
  • the PSCCH and PSSCH resources are interlaces to meet the requirement of unlicensed frequency band occupation.
  • UE 2 determines the time-frequency resource indicated by UE 1 according to the first SCI to perform LBT.
  • UE 2 can perform LBT only based on resources in slot n+b, or UE 2 can also perform LBT based on resources in slot n+b and slot n+c.
  • UE 2 can perform type 1 LBT in time slot n+b-R, where R is configured or pre-configured by the network. Or, if UE 2 determines to indicate the time-frequency resources shared by COT, that is, to determine the PSFCH or PSCCH or PSSCH transmission indication information in time slot n+b-1, the indication information is used to indicate COT, then UE 2 in time slot n Perform type 1 LBT before +b-1. UE 2 performs the above LBT on RB set 2.
  • UE 2 When UE2 LBT succeeds, UE 2 indicates to share COT on PSFCH or PSCCH or PSSCH of RB set 2. Assume that UE2 uses PSFCH to indicate shared COT. In the example in Figure 5, n+b-1 is the last time slot configured with PSFCH resources before time slot n+b, so UE 2’s PSFCH in time slot n+b-1 A resource indicates a shared COT. Assume that UE2 uses PSCCH or PSSCH to indicate COT sharing. In the example in Figure 5, n+b-1 is a time slot belonging to the resource pool, so UE2 indicates COT sharing in PSSCH or PSCCH in time slot n+b-1.
  • the PSFCH resource carries one bit of indication information.
  • UE 1 receives the indication information, it uses Type 2 LBT for channel access.
  • UE 1 accesses the channel according to Type 1 LBT or does not perform LBT.
  • the indication information is the first value, use Type 2 LBT to perform channel access.
  • the indication information is the second value, use Type 1 LBT to access the channel or not perform LBT.
  • UE 1 specifically uses the type of Type 2 LBT for channel access to be implemented by UE 1 or configured or pre-configured by the network.
  • sharing indication information includes remaining COT duration, channel access priority and channel access type (for example: Type 2A/2B/2C) one or more of .
  • UE 1 receives the sharing instruction information, it performs Type 2 channel access.
  • the channel access priority of UE 1 is higher than the channel access priority in the sharing indication information, Type 2 is used to access the channel. Otherwise, do not perform LBT or perform Type 1 LBT access.
  • UE 1 judges whether to use Type 2 LBT to access the channel or use Type 1 LBT to access or not to perform LBT according to the remaining COT duration.
  • UE 1 When UE 1 does not receive the sharing indication information, it does not perform LBT or perform Type 1 LBT access.
  • UE 2 can also carry SL-RSRP or CSI measurement results in PSSCH.
  • the above-mentioned type of UE 1 using Type 2 LBT access can be determined according to the channel access type in the sharing indication information.
  • UE 2 can perform type 1 LBT in time slot n+c-R, and R is configured or pre-configured by the network. Or, UE 2 determines the time-frequency resource shared by COT, that is, determines the PSFCH or PSCCH or PSSCH transmission indication information in time slot n+c-1, then UE 2 performs type 1 before time slot n+c-1 LBT. UE 2 performs LBT on RB set 1.
  • UE 2 When UE2 LBT succeeds, UE 2 indicates to share COT on the PSFCH or PSCCH or PSSCH resource of RB set 1. Assume that UE2 uses PSFCH to indicate shared COT. In Figure 5, n+c-1 is the last time slot configured with PSFCH resources before time slot n+c, so the PSFCH resources of UE 2 in time slot n+c-1 Indicates a shared COT. Assume that UE2 uses PSCCH or PSSCH to indicate shared COT, and n+c-1 is a time slot belonging to the resource pool, so UE2 indicates COT sharing in PSSCH or PSCCH in time slot n+c-1.
  • the PSFCH resource carries one bit of indication information.
  • UE 1 receives the indication information, it uses Type 2 LBT for channel access.
  • UE 1 accesses the channel according to Type 1 LBT or does not perform LBT.
  • the indication information is the first value, use Type 2 LBT for channel access.
  • the indication information is the second value, use Type 1 LBT to access the channel or not perform LBT.
  • UE 1 specifically uses the type of Type 2 LBT for channel access to be implemented by UE 1 or configured or pre-configured by the network.
  • the PSCCH or PSSCH resources carry sharing indication information, and the sharing indication information includes remaining COT duration, channel access priority and channel access type (e.g.Type 2A/2B/2C) one or more of .
  • the sharing instruction information When UE 1 receives the sharing instruction information, it performs Type 2 channel access.
  • Type 2 when the channel access priority of UE 1 is higher than the channel access priority in the sharing indication information, Type 2 is used to access the channel. Otherwise, do not perform LBT or perform Type 1 LBT access.
  • UE 1 judges whether to use Type 2 LBT to access the channel or use Type 1 LBT to access or not to perform LBT according to the remaining COT duration.
  • UE 1 When UE 1 does not receive the sharing indication information, it does not perform LBT or perform Type 1 LBT access.
  • UE 2 can also carry SL-RSRP or CSI measurement results in PSSCH.
  • the above-mentioned type of UE 1 using Type 2 LBT access can be determined according to the channel access type in the sharing indication information.
  • Embodiment 1 of the present application after the LBT is successful, the receiving terminal or the group leader terminal (ie, UE2) shares the COT with the sending terminal (ie, UE1). UE 1 accesses the channel using the shared COT. Since UE 2 can perceive whether its nearby UE 3 is occupying the channel, only when UE 3 is not occupying the channel can UE 2 succeed in LBT, and then transfer the COT to UE 1. Therefore, the COT obtained by UE1 in this case will not be different from that of UE3. If there is a conflict, the communication process between UE1 and UE2 will not receive interference from UE3. Thus, the technical problem in the prior art that UE1 and UE3 are mutually concealed terminals is solved, thereby improving communication reliability.
  • FIG. 6 shows a terminal device 300 provided in Embodiment 2 of the present application, which is used to share a channel occupancy time.
  • UE2 may be a receiving terminal of the first terminal device UE1, or may be a group head terminal.
  • the terminal device 300 includes:
  • a resource determining unit 310 configured to receive resource indication information sent by the first terminal device, and determine a transmission resource indicated by the first terminal device according to the resource indication information;
  • a listening unit 320 configured to perform listen-before-talk LBT according to the indicated transmission resource
  • the sharing unit 330 is configured to share the channel occupancy time COT with the first terminal device if the monitoring unit LBT succeeds.
  • the indicated transmission resource includes: the transmission resource indicated by the first terminal device through sidelink control information SCI.
  • the indicated transmission resource includes: the transmission resource indicated by the first terminal device through the SCI for the same data transmission block TB; or, the transmission resource for a different TB indicated by the first terminal device through the SCI resource.
  • the SCI includes a first SCI or a second SCI; wherein, the first SCI is carried in a physical sidelink control channel PSCCH; and the second SCI information is carried in a physical sidelink shared channel PSSCH.
  • the monitoring unit 320 is specifically configured to perform LBT according to at least one of the indicated transmission resources.
  • the monitoring unit 320 is more specifically configured to perform LBT according to the transmission resource corresponding to the next transmission indicated by the first terminal device; or, perform LBT according to the transmission resource for the same TB indicated by the first terminal device LBT, wherein the transmission resource for the same TB does not include the transmission resource for indication.
  • the monitoring unit 320 is also configured to perform LBT on the resource block set RB set where the indicated transmission resource is located; or perform LBT before the time slot where the indicated transmission resource is located; or, perform LBT on the time slot where the indicated transmission resource is located;
  • the second terminal device performs LBT before sharing the transmission resources of the COT determined according to the indicated transmission resources.
  • the sharing unit 330 is specifically configured to share the COT with the first terminal through the physical sidelink control channel PSCCH or the physical sidelink shared channel PSSCH or the physical sidelink feedback channel PSFCH if the sharing unit LBT is successful equipment.
  • the PSCCH or the PSSCH or the PSFCH meets one of the following conditions:
  • the PSCCH or PSSCH is the PSCCH or PSSCH in the previous time slot of the indicated transmission resource or in the previous time slot belonging to the resource pool; or,
  • the PSFCH is the PSFCH in the last time slot configured with PSFCH before the indicated transmission resource, or the PSFCH in the last time slot configured with PSFCH belonging to the resource pool; or,
  • the PSCCH or the PSSCH or the PSFCH and the indicated transmission resource are located in the same resource block set RB Set.
  • the sharing unit 320 is also configured to process at least one of the following items while instructing the first terminal device UE1 to share the COT:
  • the channel access priority is indicated to the first terminal device.
  • a terminal device 400 provided in Embodiment 3 of the present invention is configured to receive shared channel occupancy time. Corresponds to the first terminal UE1 in FIG. 2 .
  • the terminal device 400 includes:
  • a sending unit 410 configured to send resource indication information, where the resource indication information is used to indicate transmission resources;
  • the obtaining unit 420 is configured to obtain the channel occupancy time COT shared by the second terminal device.
  • the channel occupancy time is shared with the second terminal device after the second terminal device succeeds in listening before speaking LBT according to the transmission resources indicated by the resource indication information. of the sending unit;
  • the access unit 430 is configured to perform channel access according to the COT shared by the second terminal device.
  • the sending unit 410 is specifically configured to indicate the transmission resource through sidelink control information SCI.
  • the sending unit 410 is more specifically configured to use the SCI to indicate the transmission resources used for the same data transmission block TB; or, use the SCI to indicate the transmission resources used for different TBs.
  • the SCI includes a first SCI or a second SCI; wherein, the first SCI is carried in a physical sidelink control channel PSCCH; and the second SCI information is carried in a physical sidelink shared channel PSSCH.
  • the access unit 420 is specifically configured to: use the second type of LBT to perform channel access if receiving the sharing indication information of the shared COT of the second terminal device; and/or, if not receiving the For the sharing indication information of the shared COT of the second terminal device, the first type of LBT is used for channel access, or LBT is not performed.
  • the access unit 420 is specifically configured to determine to use the first type of LBT for channel access, or to use the second type of LBT for channel access according to the sharing instruction information of the shared COT of the second terminal device. In, or, without LBT.
  • FIG. 8 is a schematic structural diagram of a terminal device 500 provided in Embodiment 4 of the present invention.
  • the terminal device 500 includes: a processor 510 , a memory 520 and a network interface 530 .
  • the processor 510 and the memory 520 are connected to each other through a bus system.
  • the memory 520 is a computer-readable storage medium on which programs that can run on the processor 510 are stored.
  • the processor 510 calls the program in the memory 520 to execute the corresponding process implemented by the first terminal device in the method for sharing channel occupancy time provided in the first embodiment above, or execute the shared channel occupancy time method provided in the first embodiment above.
  • the corresponding process is implemented by the second terminal device, and the processing result is sent out through the network interface 530 .
  • the processor 510 may be an independent component, or may be a general term for multiple processing components. For example, it may be a CPU, or an ASIC, or one or more integrated circuits configured to implement the above method, such as at least one microprocessor DSP, or at least one programmable gate or FPGA, etc.
  • the available medium may be a magnetic medium (for example, a floppy disk, a hard disk, a magnetic tape), an optical medium (for example, a digital video disc (Digital Video Disc, DVD)), or a semiconductor medium (for example, a solid state disk (Solid State Disk, SSD) )wait.
  • a magnetic medium for example, a floppy disk, a hard disk, a magnetic tape
  • an optical medium for example, a digital video disc (Digital Video Disc, DVD)
  • a semiconductor medium for example, a solid state disk (Solid State Disk, SSD)
  • the computer-readable storage medium includes, but is not limited to, random access memory (Random Access Memory, RAM), flash memory, read-only memory (Read Only Memory, ROM), erasable programmable read-only memory (Erasable Programmable ROM, EPROM) ), electrically erasable programmable read-only memory (Electrically EPROM, EEPROM), registers, hard disk, removable hard disk, compact disc (CD-ROM) or any other form of storage medium known in the art.
  • An exemplary computer-readable storage medium is coupled to the processor such that the processor can read information from, and write information to, the computer-readable storage medium.
  • the computer-readable storage medium can also be an integral part of the processor.
  • the processor and computer readable storage medium may reside in the ASIC.
  • the ASIC may be located in an access network device, a target network device or a core network device.
  • the processor and the computer-readable storage medium may also exist as discrete components in the access network device, target network device or core network device.
  • the computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on the computer or chip, the processes or functions described in the specific implementation manners of the present application will be generated in whole or in part.
  • the computer can be a general purpose computer, a special purpose computer, a computer network, or other programmable devices.
  • the computer program instructions may be stored in the above-mentioned computer-readable storage medium, or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer program instructions may be sent from a website site, computer, server or The data center transmits to another website site, computer, server or data center through wired (such as coaxial cable, optical fiber, digital subscriber line (Digital Subscriber Line, DSL)) or wireless (such as infrared, wireless, microwave, etc.).
  • wired such as coaxial cable, optical fiber, digital subscriber line (Digital Subscriber Line, DSL)
  • wireless such as infrared, wireless, microwave, etc.

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Abstract

一种共享信道占用时间的方法及其终端设备。该方法包括第二终端设备接收第一终端设备发送的资源指示信息，并根据所述资源指示信息确定第一终端设备指示的传输资源；所述第二终端设备根据所述指示的传输资源进行先听后说LBT；若所述第二终端设备LBT成功，则将信道占用时间COT共享给所述第一终端设备。本方法由第二终端设备进行LBT，并将获得的信道占用时间COT共享给所述第一终端设备，第一终端设备则根据该COT进行信道接入。由此解决了第一终端设备与第二终端设备附近的其他终端设备之间互为隐蔽终端的问题，提高了通信可靠性。

Description

一种共享信道占用时间的方法及其终端设备 技术领域
本发明涉及通信技术领域，尤其涉及一种侧行链路传输的技术领域。
背景技术
侧行链路传输是指终端设备与终端设备之间通过侧行链路(Sidelink，SL)直接进行传输，其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。V2X(Vehicle to Everything，车辆到其他设备)系统中也支持侧行链路传输，即V2V(Vehicle to Vehicle，车辆到车辆)的方式。因此，侧行链路传输具有更高的频谱效率以及更低的传输时延。
另外，一些国家和地区会划分出一部分可共享的无线电设备通信的频谱，即非授权频谱。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。例如，WIFI系统就部署在非授权频谱上。由于非授权频谱无需进行政府授权即可使用，因此，在非授权频谱的使用中，需遵循LBT(Listen Before Talk，先听后说)机制。
在非授权频谱上，所有通信设备在发送信号前都要进行LBT。即通信设备在非授权频谱的信道上进行信号发送前，需要先进行信道监听，只有当信道监听结果为信道空闲时，该通信设备才能进行信号发送。因此，当侧行链路上的终端设备工作在非授权频段时，侧行链路的UE也需进行LBT，当LBT成功后，才能接入信道，发送数据。
但是，在非授权侧行链路传输SL-U系统中，普遍存在隐蔽站问题。如UE 1与UE 2通信，UE 3与UE 4通信。UE 1与UE 3距离较远，在LBT过程中互相没办法感知到对方在占用信道，监听均为空闲，因此均成功接入信道。当UE 1与UE 3同时接入信道进行传输时，UE 3的发送则会对UE 1到UE 2的传输造成干扰，导致通信可靠性降低。
发明内容
本发明提供一种共享信道占用时间的方法及其终端设备方法及其终端设备。
本发明提供以下技术方案：
一方面，提供一种共享信道占用时间的方法，其包括第二终端设备接收第一终端设备发送的资源指示信息，并根据所述资源指示信息确定第一终端设备指示的传输资源；所述第二终端设备根据所述指示的传输资源进行先听后说LBT；
若所述第二终端设备LBT成功，则将信道占用时间COT共享给所述第一终端设备。
另一方面，提供一种共享信道占用时间的方法，其包括第一终端设备发送用于指示传输资源的资源指示信息；所述第一终端设备获得所述第二终端设备共享的信道占用时间COT，所述信道占用时间是所述第二终端设备根据所述资源指示信息指示的传输资源进行先听后说LBT成功后，共享给所述第一终端设备的；所述第一终端设备根据所述第二终端设备共享的COT进行信道接入。
另一方面，提供一种终端设备，用于共享信道占用时间；其包括资源确定单元，用于接收第一终端设备发送的资源指示信息，并根据所述资源指示信息确定第一终端设备指示的传输资源；监听单元，用于根据所述指示的传输资源进行先听后说LBT；共享单元，用于若所述监听单元LBT成功，将信道占用时间COT共享给所述第一终端设备。
另一方面，提供一种终端设备，用于接收共享的信道占用时间；其包括：发送单元，用于发送资源指示信息，所述资源指示信息用于指示传输资源；获取单元，用于获得所述第二终端设备共享 的信道占用时间COT，所述信道占用时间是所述第二终端设备根据所述资源指示信息指示的传输资源进行先听后说LBT成功后，共享给所述发送单元的；接入单元，用于根据所述第二终端设备共享的COT进行信道接入。
另一方面，提供一种共享信道占用时间的终端设备，其包括：处理器、存储器以及网络接口；所述处理器调用所述存储器中的程序，执行本申请任意一个共享信道占用时间的方法的具体实施方式，并将执行结果通过所述网络接口发送出去。
另一方面，提供一种芯片，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，安装有所述芯片的设备执行本申请任意一个共享信道占用时间的方法的具体实施方式。
另一方面，提供一种计算机可读存储介质，其特征在于，所述计算机可读存储介质上存储有用于上行传输方法的程序，所述用于上行传输方法的程序被处理器执行本申请任意一个共享信道占用时间的方法的具体实施方式。
另一方面，提供一种计算机程序产品，其特征在于，所述计算机程序产品存储于非瞬时性计算机可读存储介质，所述计算机程序被执行执行本申请任意一个共享信道占用时间的方法的具体实施方式。
另一方面，提供一种计算机程序，其特征在于，所述计算机程序所述计算机程序被执行执行本申请任意一个共享信道占用时间的方法的具体实施方式。
本发明的有益效果在于由第二终端设备根据第一终端设备指示的传输资源，进行LBT；若第二终端设备LBT成功，则将获得的信道占用时间COT共享给所述第一终端设备，第一终端设备则根据该COT进行信道接入。如此一来，第一终端设备，与第二终端设备附近的其他终端设备之间，则不会形成互为隐蔽终端，即解决了隐蔽终端的问题，提高了通信可靠性。
附图说明
图1A和图1B为本申请实施方式应用的系统架构图。
图2为本申请实施方式的一种应用场景。
图3为本申请实施方式一提供的一种共享信道占用时间的方法的流程示意图。
图4为基站在不同场景下共享COT应用不同的信道接入方案的示意图。
图5为本申请实施方式一的一个具体示例。
图6为本申请实施方式二提供的一种终端设备的模块示意图。
图7为本申请实施方式三提供的一种终端设备的模块示意图。
图8为本申请实施方式四提供的一种终端设备的结构示意图。
具体实施方式
为了使本发明的目的、技术方案及优点更加清楚明白，以下结合附图及实施方式，对本发明进行进一步详细说明。应当理解，此处所描述的实施方式仅用以解释本发明，并不用于限定本发明。但是，本发明可以以多种不同的形式来实现，并不限于本文所描述的实施方式。相反地，提供这些实施方式的目的是使对本实用新型的公开内容的理解更加透彻全面。
除非另有定义，本文所实用的所有的技术和科学术语与属于本发明的技术领域的技术人员通常理解的含义相同。本文中在本发明的说明书中所使用的术语只是为了描述具体的实施方式的目的，不是旨在限制本发明。
应理解，本文中术语“系统”或“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。
本申请实施例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、新无线(New Radio，NR)系统、NR系统的演进系统、免授权频谱上的LTE(LTE-based access to unlicensed spectrum，LTE-U)系统、免授权频谱上的NR(NR-based access to unlicensed spectrum，NR-U)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)、下一代通信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)，以及车辆间(Vehicle to Vehicle，V2V)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。
本申请实施例对应用的频谱并不限定。例如，本申请实施例可以应用于授权频谱，也可以应用于免授权频谱。
请参看图1A和1B，其示出了本申请实施方式应用的无线通信系统100。该无线通信系统100为侧行链路传输系统。
关于侧行链路传输，3GPP(3rd Generation Partnership Project，第三代合作伙伴计划)定义了两种传输模式：模式A和模式B。
模式A：如图1A所示，终端设备120为侧行链路终端设备SL UE，其传输资源是由网络设备110分配的，终端设备120根据网络设备110分配的资源在侧行链路上进行数据的发送；网络设备110可以为终端设备120分配单次传输的资源，也可以为终端设备120分配半静态传输的资源。
模式B：如图1B所示，终端设备120在资源池中选取至少一个资源进行数据的传输。具体的，终端设备120可以通过侦听的方式在资源池中选取传输资源，或者通过随机选取的方式在资源池中选取传输资源。
终端设备120既可以是D2D(Device to Device，终端到终端)中的终端设备也可以是车联网中的车辆终端。
可选地，该无线通信系统100可以包括多个网络设备并且每个网络设备的覆盖范围内可以包括其它数量的用户设备，本申请实施方式对此不做限定。
其中，该网络设备110可以为特定的地理区域提供通信覆盖，并且可以与位于该覆盖区域内的用户设备(例如UE)进行通信。可选地，该网络设备110可以是GSM系统或CDMA系统中的基站(Base Transceiver Station，BTS)，也可以是WCDMA系统中的基站(NodeB，NB)，还可以是LTE系统中的演进型基站(Evolutional Node B，eNB或eNodeB)，或者是云无线接入网络(Cloud Radio Access Network，CRAN)中的无线控制器，或者该网络设备可以为中继站、接入点、车载设备、可穿戴设备、5G网络中的网络侧设备或者未来演进的公共陆地移动网络(Public Land Mobile Network，PLMN)中的网络设备等。
该终端设备120可以是移动的或固定的。可选地，该用户设备120可以指接入终端、用户设备(User Equipment，UE)、用户单元、用户站、移动站、移动台、远方站、远程终端、移动设备、 用户设备、终端、无线通信设备、用户代理或用户装置。接入终端可以是蜂窝电话、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、个人数字处理(Personal Digital Assistant，PDA)、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、5G网络中的用户设备或者未来演进的PLMN中的用户设备等。
本申请以下实施方式将详细阐述侧行链路传输中如何避免终端设备之间相互形成隐蔽终端，以提升通信可靠性。
实施方式一
请参看图3，为本申请实施方式一提供的一种共享信道占用时间的方法。该方法包括：
S210，第一终端设备发送用于指示传输资源的资源指示信息；
S220，第二终端设备接收该第一终端设备发送的资源指示信息，根据该资源指示信息确定该第一终端设备指示的传输资源；
S230，第二终端设备根据所述传输资源进行先听后说LBT，若LBT成功，则获得信道占用时间COT(Channel Occupancy Time)，并将该COT共享给所述第一终端设备；
S240，该第一终端设备根据该第二终端设备共享的COT进行信道接入。
请继续参看图2，此为本申请实施方式一的一种应用场景。在图2所示的侧行链路传输中，第一终端设备UE1与第二终端设备UE2进行通信，UE1发送信息或数据给UE2；第三终端设备UE 3与第四终端设备UE 4进行通信，UE3发送信息或数据给UE4。UE 1与UE 3距离较远，在LBT过程中互相没办法感知到对方在占用信道。
若由UE1和UE3分别进行LBT，监听均为空闲，则均会成功接入信道。但是，当UE 1与UE 3同时接入信道，进行传输时，UE 3的发送会对UE 1到UE 2的传输造成干扰，导致通信可靠性降低。
本申请实施方式一为解决此技术问题，由UE2进行LBT监听，由于UE2与UE3距离较近，可以获知对方在占用信道，因此不会出现相互被隐蔽的情况。故而解决了UE1和UE3之间互为隐蔽终端的技术问题，达到提升通信可靠性的技术效果。可选的，该LBT为类型1的LBT。
可选的，S210,所述第一终端设备发送用于指示传输资源的资源指示信息,包括：所述第一终端设备通过侧行控制信息SCI指示所述传输资源。即，该指示的传输资源包括：该第一终端设备通过侧行控制信息SCI(SidelinkControlInformation)指示的传输资源。
可选的，该指示的传输资源包括：该第一终端设备通过该SCI指示的用于同一数据传输块TB的传输资源；和/或，该第一终端设备通过该SCI指示的用于不同TB(Transport Block，传输块)的传输资源。
可选的，该SCI包括第一SCI或第二SCI；其中，该第一SCI承载于物理侧行控制信道PSCCH之中；该第二SCI信息承载于物理侧行共享信道PSSCH之中。
可选的，该第一终端设备指示的传输资源为时频资源。
LBT机制包括两种类型：
类型1：
通信设备首先监听时长为Td时间段内的信道，在监听到该时间段内的所有监听时隙均为空闲后，并且在下列步骤中的N等于0后，则LBT成功，通信设备即可占用信道发送数据。否则通信设备不能接入信道或继续尝试接入信道。
步骤1：设置N＝Ninit，Ninit是从0到CWp的随机值，跳转步骤4；
步骤2：如果N>0,则通信设备将N减1，即设置N＝N-1；
步骤3：继续监听时长为一个监听时隙内的信道，如果为空闲则跳转步骤4，否则跳转步骤5；
步骤4：如果N＝0,停止。否则跳转步骤2；
步骤5：继续监听信道，直到在时长为Td的时间段内监听到一个监听时隙为忙碌，或者监听到该Td的时间段内的所有的监听时隙均为空闲。
步骤6：如果时长为Td的时间段内所有的监听时隙均为空闲，则跳转步骤4，否则跳转步骤5。
上述步骤，如果没有注明跳转，则顺序执行。示例性地，上述一个监听时隙记为Tsl，Tsl为9微秒。
Ninit是从0到CWp的随机值。CWp与通信设备接入信道的优先级有关。CWp又可称为特定优先级对应的竞争窗口(Contention window)或者根据优先级确定的竞争窗口。通信设备根据接入信道的优先级确定CWmin,p、CWmax,p和允许的CWp的取值，即根据优先级确定竞争窗口的最小值、最大值和可能的取值。例如表1中，当通信设备接入信道的优先级为3时，其使用的竞争窗口的最小值、最大值和可能的取值为15、1023和{15,31,63,127,255,511,1023}。实际上，通信设备对于每一种优先级都维持着对应的竞争窗口的大小，在每次执行上述步骤1前按照一定规则对每一种优先级对应的竞争窗口进行调整，然后根据信道接入的优先级，确定此次执行LBT时所使用的竞争窗口，从而确定Ninit。
例如通信设备维持着CW1,CW2,CW3,CW4，当通信设备执行类型1的LBT，在执行上述步骤1前，通信设备将CW1,CW2,CW3,CW4都增加到下一个更大的允许的值，若此次通信设备接入信道的优先级是1，则通信设备使用调整后的CW1执行此次类型1的LBT。
表1
Figure PCTCN2021139763-appb-000001
上述Td＝Tf+mp*Tsl,Tf等于16微秒，mp与信道接入的优先级相关。例如可以从表1中根据优先级，确定对应的mp。
当通信设备执行上述步骤并且LBT成功后，如果通信设备没有马上接入信道，当其需要数据发送接入信道时，不需要再次进行上述全部的类型1的LBT过程，只需要监听Td+至少一个Tsl时间段内的信道占用情况，如果空闲，就可以直接接入信道发送信号。
当通信设备LBT成功，接入信道后，其占用信道的时间称为COT(Channel Occupancy Time),在COT内，通信设备可以连续传输也可以非连续传输，但总的传输时间不超过Tmcot,p。Tmcot,p与信道接入的优先级有关，例如可从表1中查找。
类型2：
与类型1不同，类型2的LBT只需要通信设备监听固定长度的信道，如果在该固定长度内监听时隙为空闲，则通信设备可以直接接入信道。具体地，类型2又分为2A,2B,2C三种子类型：
类型2A(Type 2A):通信设备可以监听25微秒长度(记为Tshort)的信道，如果Tshort内的监听时隙均为空闲，则通信设备可以直接接入信道。
类型2B(Type 2B)：通信设备可以监听16微秒长度的信道(记为Tf)，如果Tf内的监听时隙为空闲，则通信设备可以直接接入信道
类型2C(Type 2C):通信设备可以不进行LBT直接接入信道，该类型只能应用于此次传输距离上一次传输间的间隔小于或等于16微秒的情况。同时此次传输的长度不超过584微秒。例如：上述判断监听时隙中为忙碌的标准为，9us中存在4us忙碌。否则判断监听时隙为空闲。或者，上述判断忙碌的标准为监听到的能量或功率大于或等于某一阈值
Figure PCTCN2021139763-appb-000002
可选的，本申请的实施方式中，当该第二终端设备LBT成功时，如果不立即接入信道，当其接入信道时，只需要监听Td+至少一个Tsl时间段内的信道占用情况，如果空闲，就可以直接接入信道，并将COT共享给第一终端设备。
可选的，S230，第二终端设备根据所述传输资源进行先听后说LBT，若LBT成功，则获得信道占用时间COT，并将该COT共享给所述第一终端设备，包括：
若该第二终端设备LBT成功，则第二终端设备通过物理侧行控制信道PSCCH或物理侧行共享信道PSSCH或物理侧行反馈信道PSFCH将该COT共享给该第一终端设备。
通信设备在LBT成功后，还支持将获得的COT共享给其他通信设备。不同的COT共享场景下应用的信道接入类型也不相同。请参看图4，其以基站侧的COT共享作为示例。基站将其COT共享给终端设备。在基站获得的COT内发生上行传输机会，如果上行传输机会的起始位置和下行传输机会的结束位置之间的空隙小于或等于16μs，则终端设备可以在该上行传输前进行Type2C型的信道接入；如果该上行传输机会的起始位置和下行传输机会的结束位置之间的空隙等于16μs，则终端设备UE可以在该上行传输前进行Type2B型的信道接入；如果该上行传输机会的起始位置和下行传输机会的结束位置之间的空隙等于25μs或大于25μs，UE可以在该上行传输前进行Type2A信道接入。另外，基站获得的COT内可以包括多个上下行转换点。当基站将自己获得的COT共享给UE进行上行传输后，在该COT内基站也可以使用Type2信道接入方式例如Type2A信道接入方式进行信道监听，并在信道监听成功后重新开始下行传输。
可选的，S230中，该第二终端设备在向第一终端设备指示共享COT的同时，还进行以下至少一项：
向该第一终端设备上报测量结果；测量结果包括但不限于：SL-RSRP(Sidelink Reference Signal Received Power，侧行参考信号接收功率)，CSI(Channel State information，信道状态信息)中至少一种；
向该第一终端设备指示该LBT的类型；例如是类型Type2A、Type2B或Type2C；
向该第一终端设备指示剩余信道占用时间COT的时长；
向该第一终端设备指示信道接入优先级。
可选的，该第二终端设备为该第一终端设备的接收端，或者，该第二终端设备为组头终端设备。例如，所述组头终端为一组终端中进行调度的终端。
可选的，该第二终端设备根据该指示的传输资源进行LBT包括：该第二终端设备根据该指示的传输资源中的至少一个进行LBT。
例如：该第二终端设备根据该第一终端设备指示的下一次传输对应的传输资源进行LBT；或者，该第二终端设备根据该第一终端设备指示的用于同一TB的传输资源进行LBT，其中，该用于同一TB的传输资源不包括用于指示的传输资源。
可选的，该第二终端设备根据该指示的传输资源进行LBT还包括：该第二终端设备在该指示的传输资源位于的资源块集合RB set(Resource Block Set，资源块集合)上进行LBT；和/或，该第二终端设备在该指示的传输资源位于的时隙之前进行LBT。
例如，在该指示的传输资源位于的时隙之前R个时隙开始进行LBT；R可以由以下几种方式中的任意一种确定：网络配置，预配置，取决于终端设备实现，由标准规定的预设值，或设定R为1。其中，RB Set是指，在非授权频谱系统中，将载波上的频域资源分为若干资源块集合，并且在资源块集合之间配置保护频带。如一个RB set对应20MHz的频域宽度。通信设备进行LBT的粒度为一个RB set，因此一个RB set又可以称为一个LBT子带。即，如果通信设备要在某一个RB set上发送数据，需要在该RB set上进行LBT，LBT成功后进行传输。
又例如，该第二终端根据该指示的传输资源确定共享COT的传输资源，并在该共享COT的传输资源之前进行LBT。
可选的，第二终端可通过PSCCH或PSSCH或PSFCH传输共享指示信息，该共享指示信息用于指示COT共享。例如：该第二终端设可以是通过物理侧行控制信道PSCCH(Physical Sidelink Control Channel)、物理侧行共享信道PSSCH(Physical Sidelink Shared Channel)、或物理侧行反馈信道PSFCH(Physical Sidelink Feedback Channel)传输该共享指示信息。
可选的，该PSCCH或该PSSCH或该PSFCH满足下列条件之一：
该PSCCH或PSSCH为该指示的传输资源前一个时隙内或前一个属于资源池的时隙内的PSCCH或PSSCH；或者，该PSFCH为该指示的传输资源前最后一个配置了PSFCH的时隙内的PSFCH，或属于资源池的最后一个配置了PSFCH的时隙内的PSFCH；和/或，
该PSCCH或该PSSCH或该PSFCH与该指示的传输资源位于同一资源块集合RB Set。
可选的，该资源池为该第一终端设备的资源池或为该第二终端设备的资源池。示例性地，所述资源池为第一终端设备的资源池或为第二终端设备的资源池。所述资源池可为发送资源池或接收资源池。
可选的，S240，该第一终端设备根据该第二终端设备共享的COT进行信道接入，包括：
所述第一终端设备若收到所述第二终端设备的共享COT的共享指示信息，采用第二类型的LBT进行信道接入；和/或，
所述第一终端设备若未收到所述第二终端设备的共享COT的共享指示信息，采用第一类型的LBT进行信道接入，或不进行LBT。
可选的，S240，该第一终端设备根据该第二终端设备共享的COT进行信道接入，包括：
所述第一终端设备根据所述第二终端设备的共享COT的共享指示信息，确定采用第一类型的LBT进行信道接入，或，采用第二类型的LBT进行信道接入，或者，不进行LBT。
请参看图5，为本申请实施方式的一个具体示例。其中，第一终端设备UE1和第二终端设备UE2之间进行侧行链路传输。UE1发送侧行控制信息SCI给UE2，并向UE2传输数据。UE2共享COT给UE1。图中横轴t为时域，纵轴f为频域。该示例包括两个资源块集合RBSet 1和RBSet 2。RBSet1和RBSet2中的均包括PSFCH 710，PSSCH720，PSCCH730。其中，UE 2为UE 1的接收端，或者UE 2为组头终端。
UE 1在时隙n发送PSCCH和PSSCH，利用PSCCH中的第一侧行控制信息SCI指示时隙n、n+b和n+c的时频资源。上述三个资源用于同一TB的传输。图中PSCCH和PSSCH资源为梳齿(Interlace)是为了满足非授权频谱频带占用要求。UE 2根据该第一SCI确定UE 1指示的时频资源进行LBT。UE 2可只根据时隙n+b中的资源进行LBT，或者，UE 2也可根据时隙n+b和时隙n+c中的资源进行LBT。
若UE 2根据时隙n+b中的资源进行LBT，则UE 2可在时隙n+b-R进行type 1的LBT，其中，R是由网络配置或预配置。或者，若UE 2确定指示COT共享的时频资源，即确定在时隙n+b-1中的PSFCH或PSCCH或PSSCH传输指示信息，该指示信息用于指示COT，则UE 2在时隙n+b-1前进行type 1的LBT。UE 2在RB set 2上进行上述LBT。
当UE2 LBT成功后，UE 2在RB set 2的PSFCH或PSCCH或PSSCH上指示共享COT。假设，UE2是使用PSFCH指示共享COT，图5示例中n+b-1为时隙n+b之前最后一个配置了PSFCH资源的时隙，因此UE 2在时隙n+b-1中的PSFCH资源指示共享COT。假设，UE2是使用PSCCH或PSSCH指示共享COT，图5示例中n+b-1为属于资源池的时隙，因此UE 2在时隙n+b-1中的PSSCH或PSCCH中指示COT共享。
当UE2是使用PSFCH指示共享COT时，PSFCH资源中携带一比特指示信息，当UE 1收到该指示信息时，利用Type 2 LBT进行信道接入。当UE 1未收到该指示信息时，UE 1根据Type 1 LBT接入信道或不进行LBT。或者，若该指示信息为第一值，利用Type 2 LBT进行信道接入。若该指示信息为第二值，利用Type 1 LBT接入信道或不进行LBT。可选的，在该情况下，UE 1具体使用Type 2 LBT进行信道接入的类型由UE 1实现或由网络配置或预配置。
若UE2是使用PSCCH或PSSCH指示共享COT，PSCCH或PSSCH资源中携带共享指示信息，共享指示信息包括剩余COT时长，信道接入优先级和信道接入类型(例如：Type 2A/2B/2C)中的一种或多种。当UE 1收到该共享指示信息时，进行Type 2信道接入。可选的，当UE 1的信道接入优先级高于共享指示信息中的信道接入优先级时，使用Type 2接入信道。否则，不进行LBT或进行Type 1 LBT接入。可选的，UE 1根据剩余COT时长判断使用Type 2 LBT接入信道或使用Type 1LBT接入或不进行LBT。当UE 1未收到该共享指示信息时，不进行LBT或进行Type 1 LBT接入。当使用PSSCH资源时，UE 2还可以在PSSCH中承载SL-RSRP或CSI测量结果。可选的，上述UE 1使用Type 2 LBT接入的类型可以根据共享指示信息中的信道接入类型确定。
若UE 2根据时隙n+c中的资源进行LBT，UE 2可在时隙n+c-R进行type 1的LBT，R由网络配置或预配置。或者，UE 2确定指示COT共享的时频资源，即确定在时隙n+c-1中的PSFCH或PSCCH或PSSCH传输指示信息，则UE 2在时隙n+c-1前进行type 1的LBT。UE 2在RB set 1上进行LBT。
当UE2 LBT成功后，UE 2在RB set 1的PSFCH或PSCCH或PSSCH资源上指示共享COT。假设，UE2是使用PSFCH指示共享COT，图5中n+c-1为时隙n+c之前最后一个配置了PSFCH资源的时隙，因此UE 2在时隙n+c-1中的PSFCH资源指示共享COT。假设，UE2是使用PSCCH或PSSCH指示共享COT，，n+c-1为属于资源池的时隙，因此UE 2在时隙n+c-1中的PSSCH或PSCCH中指示COT共享。
当UE2是使用PSFCH指示共享COT时，PSFCH资源中携带一比特指示信息，当UE 1收到该指示信息时，利用Type 2 LBT进行信道接入。当UE 1未收到该指示信息时，UE 1根据Type 1 LBT接入信道或不进行LBT。或者若该指示信息为第一值，利用Type 2 LBT进行信道接入。若该指示信息为第二值，利用Type 1 LBT接入信道或不进行LBT。可选的，在该情况下，UE 1具体使用Type 2 LBT进行信道接入的类型由UE 1实现或由网络配置或预配置。
具体地，当使用PSCCH资源或PSSCH资源时，PSCCH或PSSCH资源中携带共享指示信息，共享指示信息包括剩余COT时长，信道接入优先级和信道接入类型(e.g.Type 2A/2B/2C)中的一种或多种。当UE 1收到该共享指示信息时，进行Type 2信道接入。可选的，当UE 1的信道接入优先级高于共享指示信息中的信道接入优先级时，使用Type 2接入信道。否则，不进行LBT或进行Type 1 LBT接入。可选的，UE 1根据剩余COT时长判断使用Type 2 LBT接入信道或使用Type 1 LBT接入或不进行LBT。当UE 1未收到该共享指示信息时，不进行LBT或进行Type 1 LBT接入。当使用PSSCH资源时，UE 2还可以在PSSCH中承载SL-RSRP或CSI测量结果。可选的，上述UE 1使用Type 2 LBT接入的类型可以根据共享指示信息中的信道接入类型确定。
本申请的实施方式一中，由接收终端或组头终端(即UE2)LBT成功后，共享COT给发送终端(即UE1)。UE 1利用共享的COT接入信道。由于UE 2可以感知其附近UE 3是否占用信道，只有UE 3未占用信道时UE 2才能LBT成功，进而将COT至UE 1，由此，UE1在此种情况下获得的COT是不会与UE3相冲突的，UE1与UE2的通信过程，就不会收到UE3的干扰。由此，解决了现有技术中UE1与UE3之间互为隐蔽终端的技术问题，从而提升了通信的可靠性。
实施方式二
请参看图6，为本申请实施方式二提供的一种终端设备300，用于共享信道占用时间。对应于图2中的第二终端设备UE2，即UE2可为第一终端设备UE1的接收终端，或者为组头终端。该终端设备300包括：
资源确定单元310，用于接收第一终端设备发送的资源指示信息，并根据该资源指示信息确定第一终端设备指示的传输资源；
监听单元320，用于根据该指示的传输资源进行先听后说LBT；
共享单元330，用于若该监听单元LBT成功，将信道占用时间COT共享给该第一终端设备。
可选的，该指示的传输资源包括：该第一终端设备通过侧行控制信息SCI指示的传输资源。
可选的，该指示的传输资源包括：该第一终端设备通过该SCI指示的用于同一数据传输块TB的传输资源；或者，该第一终端设备通过该SCI指示的用于不同TB的传输资源。
可选的，该SCI包括第一SCI或第二SCI；其中，该第一SCI承载于物理侧行控制信道PSCCH之中；该第二SCI信息承载于物理侧行共享信道PSSCH之中。
可选的，该监听单元320，具体用于根据该指示的传输资源中的至少一个进行LBT。
可选的，该监听单元320，更具体的用于根据该第一终端设备指示的下一次传输对应的传输资源进行LBT；或者，根据该第一终端设备指示的用于同一TB的传输资源进行LBT，其中，该用于同一TB的传输资源不包括用于指示的传输资源。
可选的，该监听单元320，还用于在该指示的传输资源位于的资源块集合RB set上进行LBT；或者，在该指示的传输资源位于的时隙之前进行LBT；或者，在所述第二终端设备根据所述指示的传输资源确定的共享COT的传输资源之前进行LBT。
可选的，该共享单元330，具体用于若该共享单元LBT成功，则通过物理侧行控制信道PSCCH或物理侧行共享信道PSSCH或物理侧行反馈信道PSFCH将该COT共享给该第一终端设备。
可选的，该PSCCH或该PSSCH或该PSFCH满足下列条件之一：
该PSCCH或PSSCH为该指示的传输资源前一个时隙内或前一个属于资源池的时隙内的PSCCH或PSSCH；或者，
该PSFCH为该指示的传输资源前最后一个配置了PSFCH的时隙内的PSFCH，或属于资源池的最后一个配置了PSFCH的时隙内的PSFCH；或者，
该PSCCH或该PSSCH或该PSFCH与该指示的传输资源位于同一资源块集合RB Set。
可选的，该共享单元320在向该第一终端设备UE1指示共享COT的同时，还用于处理以下至少一项：
向该第一终端设备上报测量结果；
向该第一终端设备指示该LBT的类型；
向该第一终端设备指示剩余信道占用时间COT的时长；
向该第一终端设备指示信道接入优先级。
本实施方式二中有不详尽之处，请参见上述实施方式一中相同或相应的部分，在此不做重复赘述。
实施方式三
请参看图7，本发明实施方式三提供的一种终端设备400，用于接收共享的信道占用时间。对应于图2中的第一终端设备UE1。该终端设备400包括：
发送单元410，用于发送资源指示信息，该资源指示信息用于指示传输资源；
获取单元420，用于获得该第二终端设备共享的信道占用时间COT，该信道占用时间是该第二终端设备根据该资源指示信息指示的传输资源进行先听后说LBT成功后，共享给该发送单元的；
接入单元430，用于根据该第二终端设备共享的COT进行信道接入。
可选的，该发送单元410，具体用于通过侧行控制信息SCI指示该传输资源。
可选的，该发送单元410，更具体用于通过该SCI指示用于同一数据传输块TB的传输资源；或者，通过该SCI指示的用于不同TB的传输资源。
可选的，该SCI包括第一SCI或第二SCI；其中，该第一SCI承载于物理侧行控制信道PSCCH之中；该第二SCI信息承载于物理侧行共享信道PSSCH之中。
可选的，该接入单元420，具体用于：若收到该第二终端设备的共享COT的共享指示信息，采用第二类型的LBT进行信道接入；和/或，若未收到该第二终端设备的共享COT的共享指示信息，采用第一类型的LBT进行信道接入，或不进行LBT。
可选的，该接入单元420，具体用于根据该第二终端设备的共享COT的共享指示信息，确定采用第一类型的LBT进行信道接入，或，采用第二类型的LBT进行信道接入，或者，不进行LBT。
本实施方式三中有不详尽之处，请参见上述实施方式一或实施方式二中相同或相应的部分，在此不做重复赘述。
实施方式四
请参看图8，本发明实施方式四提供的一种终端设备500的结构示意图。该终端设备500包括：处理器510、存储器520以及网络接口530。处理器510与存储器520通过总线系统实现相互之间的通信连接。
存储器520为一计算机可读存储介质，其上存储可在处理器510上运行的程序。处理器510调用存储器520中的程序，执行上述实施方式一提供的一种共享信道占用时间的方法中由第一终端设备实现的相应流程，或者，执行上述实施方式一提供的一种共享信道占用时间的方法中由第二终端设备实现的相应流程，并将处理结果通过网络接口530发送出去。
该处理器510可以是一个独立的元器件，也可以是多个处理元件的统称。例如，可以是CPU，也可以是ASIC，或者被配置成实施以上方法的一个或多个集成电路，如至少一个微处理器DSP，或至少一个可编程门这列FPGA等。
本领域技术人员应该可以意识到，在上述一个或多个示例中，本申请具体实施方式所描述的功能可以全部或部分地通过软件、硬件、固件或者其任意组合来实现。当使用软件实现时，可以是由处理器执行软件指令的方式来实现。软件指令可以由相应的软件模块组成。软件模块可以被存放于计算机可读存储介质中，所述计算机可读存储介质可以是计算机能够存取的任何可用介质或者是包含一个或多个可用介质集成的服务器、数据中心等数据存储设备。所述可用介质可以是磁性介质(例如，软盘、硬盘、磁带)、光介质(例如，数字视频光盘(Digital Video Disc，DVD))、或者半导体介质(例如，固态硬盘(Solid State Disk，SSD))等。所述计算机可读存储介质包括但不限于随机存取存储器(Random Access Memory，RAM)、闪存、只读存储器(Read Only Memory，ROM)、可擦除可编程只读存储器(Erasable Programmable ROM，EPROM)、电可擦可编程只读存储器(Electrically EPROM，EEPROM)、寄存器、硬盘、移动硬盘、只读光盘(CD-ROM)或者本领域熟知的任何其它形式的存储介质。一种示例性的计算机可读存储介质耦合至处理器，从而使处理器能够从该计算机可读存储介质读取信息，且可向该计算机可读存储介质写入信息。当然，计算机可读存储介质也可以是处理器的组成部分。处理器和计算机可读存储介质可以位于ASIC中。另外，该ASIC可以位于接入网设备、目标网络设备或核心网设备中。当然，处理器和计算机可读存储介质也可以作为分立组件存在于接入网设备、目标网络设备或核心网设备中。当使用软件实现时，也可以全部或部分地以计算机程序产品的形式实现。所述计算机程序产品包括一个或多个计算机指令。在计算机或芯片上加载和执行所述计算机程序指令时，全部或部分地产生按照本申请具体实施方式所述的流程或功能。所述计算机可以是通用计算机、专用计算机、计算机网络、或者其他可编程装置。所述计算机程序指令可以存储在上述计算机可读存储介质中，或者从一个计算机可读存储介质 向另一个计算机可读存储介质传输，例如，所述计算机指令可以从一个网站站点、计算机、服务器或数据中心通过有线(例如同轴电缆、光纤、数字用户线(Digital Subscriber Line，DSL))或无线(例如红外、无线、微波等)方式向另一个网站站点、计算机、服务器或数据中心进行传输。
上述实施方式说明但并不限制本发明，本领域的技术人员能在权利要求的范围内设计出多个可代替实例。所属领域的技术人员应该意识到，本申请并不局限于上面已经描述并在附图中示出的精确结构，对在没有违反如所附权利要求书所定义的本发明的范围之内，可对具体实现方案做出适当的调整、修改、、等同替换、改进等。因此，凡依据本发明的构思和原则，所做的任意修改和变化，均在所附权利要求书所定义的本发明的范围之内。

Claims (41)

  1. 一种共享信道占用时间的方法，其特征在于，该方法包括
    第二终端设备接收第一终端设备发送的资源指示信息，并根据所述资源指示信息确定第一终端设备指示的传输资源；
    所述第二终端设备根据所述指示的传输资源进行先听后说LBT；
    若所述第二终端设备LBT成功，则将信道占用时间COT共享给所述第一终端设备。
  2. 如权利要求1所述的方法，其特征在于，所述指示的传输资源包括：所述第一终端设备通过侧行控制信息SCI指示的传输资源。
  3. 如权利要求2所述的方法，其特征在于，所述指示的传输资源包括：
    所述第一终端设备通过所述SCI指示的用于同一数据传输块TB的传输资源；或者，
    所述第一终端设备通过所述SCI指示的用于不同TB的传输资源。
  4. 如权利要求1至3中任意一项所述的方法，其特征在于，
    所述SCI包括第一SCI或第二SCI；其中，所述第一SCI承载于物理侧行控制信道PSCCH之中；所述第二SCI信息承载于物理侧行共享信道PSSCH之中。
  5. 如权利要求1至4中任意一项所述的方法，其特征在于，所述第二终端设备根据所述指示的传输资源进行LBT包括：
    所述第二终端设备根据所述指示的传输资源中的至少一个进行LBT。
  6. 如权利要求5所述的方法，其特征在于，所述第二终端设备根据所述指示的传输资源中的至少一个进行LBT，包括：
    所述第二终端设备根据所述第一终端设备指示的下一次传输对应的传输资源进行LBT；或者，
    所述第二终端设备根据所述第一终端设备指示的用于同一TB的传输资源进行LBT，其中，所述用于同一TB的传输资源不包括用于指示的传输资源。
  7. 如权利要求1至6中任意一项所述的方法，其特征在于，所述第二终端设备根据所述指示的传输资源进行LBT还包括：
    所述第二终端设备在所述指示的传输资源位于的资源块集合RB set上进行LBT；或者，
    所述第二终端设备在所述指示的传输资源位于的时隙之前进行LBT；或者，
    所述第二终端设备根据所述指示的传输资源确定共享COT的传输资源，并在所述共享COT的传输资源之前进行LBT。
  8. 如权利要求1至7中任意一项所述的方法，其特征在于，所述若所述第二终端设备LBT成功，则将信道占用时间COT共享给所述第一终端设备，包括：
    若所述第二终端设备LBT成功，则第二终端设备通过物理侧行控制信道PSCCH或物理侧行共享信道PSSCH或物理侧行反馈信道PSFCH将所述COT共享给所述第一终端设备。
  9. 如权利要求8所述的方法，其特征在于，所述PSCCH或所述PSSCH或所述PSFCH满足下列条件之一：
    所述PSCCH或PSSCH为所述指示的传输资源前一个时隙内或前一个属于资源池的时隙内的PSCCH或PSSCH；或者，所述PSFCH为所述指示的传输资源前最后一个配置了PSFCH的时隙内的PSFCH，或属于资源池的最后一个配置了PSFCH的时隙内的PSFCH；和/或，
    所述PSCCH或所述PSSCH或所述PSFCH与所述指示的传输资源位于同一资源块集合RB Set。
  10. 如权利要求9所述的方法，其特征在于，所述资源池为所述第一终端设备的资源池或为所述第二终端设备的资源池。
  11. 如权利要求1至9中任意一项所述的方法，其特征在于，所述第二终端设备在向第一终端设备指示共享COT的同时，还进行以下至少一项：
    向所述第一终端设备上报测量结果；
    向所述第一终端设备指示所述LBT的类型；
    向所述第一终端设备指示剩余信道占用时间COT的时长；
    向所述第一终端设备指示信道接入优先级。
  12. 如权利要求1至11中任意一项所述的方法，其特征在于，所述第二终端设备为所述第一终端设备的接收端，或者，所述第二终端设备为组头终端设备。
  13. 一种共享信道占用时间的方法，其特征在于，该方法包括
    第一终端设备发送用于指示传输资源的资源指示信息；
    所述第一终端设备获得所述第二终端设备共享的信道占用时间COT，所述信道占用时间是所述第二终端设备根据所述资源指示信息指示的传输资源进行先听后说LBT成功后，共享给所述第一终端设备的；
    所述第一终端设备根据所述第二终端设备共享的COT进行信道接入。
  14. 如权利要求13所述的方法，其特征在于，所述第一终端设备发送用于指示传输资源的资源指示信息包括：所述第一终端设备通过侧行控制信息SCI指示所述传输资源。
  15. 如权利要求14所述的方法，其特征在于，所述资源指示信息指示的传输资源包括：
    所述第一终端设备通过所述SCI指示的用于同一数据传输块TB的传输资源；或者，
    所述第一终端设备通过所述SCI指示的用于不同TB的传输资源。
  16. 如权利要求14或15中任意一项所述的方法，其特征在于，
    所述SCI包括第一SCI或第二SCI；其中，所述第一SCI承载于物理侧行控制信道PSCCH之中；所述第二SCI信息承载于物理侧行共享信道PSSCH之中。
  17. 如权利要求13至16中任意一项所述的方法，其特征在于，所述第一终端设备根据所述第二终端设备共享的COT进行信道接入，包括：
    所述第一终端设备若收到所述第二终端设备的共享COT的共享指示信息，采用第二类型的LBT进行信道接入；和/或，
    所述第一终端设备若未收到所述第二终端设备的共享COT的共享指示信息，采用第一类型的LBT进行信道接入，或不进行LBT。
  18. 如权利要求13至16中任意一项所述的方法，其特征在于，所述第一终端设备根据所述第二终端设备共享的COT进行信道接入，包括：
    所述第一终端设备根据所述第二终端设备的共享COT的共享指示信息，确定采用第一类型的LBT进行信道接入，或，采用第二类型的LBT进行信道接入，或者，不进行LBT。
  19. 一种终端设备，其特征在于，所述终端设备，用于共享信道占用时间；所述终端设备包括：
    资源确定单元，用于接收第一终端设备发送的资源指示信息，并根据所述资源指示信息确定第一终端设备指示的传输资源；
    监听单元，用于根据所述指示的传输资源进行先听后说LBT；
    共享单元，用于若所述监听单元LBT成功，将信道占用时间COT共享给所述第一终端设备。
  20. 如权利要求19所述的方法，其特征在于，所述指示的传输资源包括：所述第一终端设备通过侧行控制信息SCI指示的传输资源。
  21. 如权利要求20所述的方法，其特征在于，所述指示的传输资源包括：
    所述第一终端设备通过所述SCI指示的用于同一数据传输块TB的传输资源；或者，
    所述第一终端设备通过所述SCI指示的用于不同TB的传输资源。
  22. 如权利要求19至21中任意一项所述的方法，其特征在于，
    所述SCI包括第一SCI或第二SCI；其中，所述第一SCI承载于物理侧行控制信道PSCCH之中；所述第二SCI信息承载于物理侧行共享信道PSSCH之中。
  23. 如权利要求19至22中任意一项所述的方法，其特征在于，所述监听单元，具体用于根据所述指示的传输资源中的至少一个进行LBT。
  24. 如权利要求23所述的方法，其特征在于，所述监听单元，更具体的用于根据所述第一终端设备指示的下一次传输对应的传输资源进行LBT；或者，根据所述第一终端设备指示的用于同一TB的传输资源进行LBT，其中，所述用于同一TB的传输资源不包括用于指示的传输资源。
  25. 如权利要求19至24中任意一项所述的方法，其特征在于，所述监听单元，还用于在所述指示的传输资源位于的资源块集合RB set上进行LBT；或者，在所述指示的传输资源位于的时隙之前进行LBT；或者，在所述第二终端设备根据所述指示的传输资源确定的共享COT的传输资源之前进行LBT。
  26. 如权利要求19至25中任意一项所述的方法，其特征在于，所述共享单元，具体用于若所述共享单元LBT成功，则通过物理侧行控制信道PSCCH或物理侧行共享信道PSSCH或物理侧行反馈信道PSFCH将所述COT共享给所述第一终端设备。
  27. 如权利要求26所述的方法，其特征在于，所述PSCCH或所述PSSCH或所述PSFCH满足下列条件之一：
    所述PSCCH或PSSCH为所述指示的传输资源前一个时隙内或前一个属于资源池的时隙内的PSCCH或PSSCH；或者，所述PSFCH为所述指示的传输资源前最后一个配置了PSFCH的时隙内的PSFCH，或属于资源池的最后一个配置了PSFCH的时隙内的PSFCH；和/或，
    所述PSCCH或所述PSSCH或所述PSFCH与所述指示的传输资源位于同一资源块集合RB Set。
  28. 如权利要求27所述的方法，其特征在于，所述资源池为所述第一终端设备的资源池或为所述第二终端设备的资源池。
  29. 如权利要求19至28中任意一项所述的方法，其特征在于，所述共享单元在向所述第一终端设备指示共享COT的同时，还用于处理以下至少一项：
    向所述第一终端设备上报测量结果；
    向所述第一终端设备指示所述LBT的类型；
    向所述第一终端设备指示剩余信道占用时间COT的时长；
    向所述第一终端设备指示信道接入优先级。
  30. 如权利要求19至29中任意一项所述的方法，其特征在于，所述终端设备为所述第一终端设备的接收端，或者，所述第端装置为组头终端设备。
  31. 一种终端设备，其特征在于，所述终端设备，用于接收共享的信道占用时间；所述终端设备包括：
    发送单元，用于发送资源指示信息，所述资源指示信息用于指示传输资源；
    获取单元，用于获得所述第二终端设备共享的信道占用时间COT，所述信道占用时间是所述第二终端设备根据所述资源指示信息指示的传输资源进行先听后说LBT成功后，共享给所述发送单元的；
    接入单元，用于根据所述第二终端设备共享的COT进行信道接入。
  32. 如权利要求31所述的方法，其特征在于，所述发送单元，具体用于通过侧行控制信息SCI指示所述传输资源。
  33. 如权利要求32所述的方法，其特征在于，所述发送单元，更具体用于通过所述SCI指示用于同一数据传输块TB的传输资源；或者，通过所述SCI指示的用于不同TB的传输资源。
  34. 如权利要求32或33中任意一项所述的方法，其特征在于，
    所述SCI包括第一SCI或第二SCI；其中，所述第一SCI承载于物理侧行控制信道PSCCH之中；所述第二SCI信息承载于物理侧行共享信道PSSCH之中。
  35. 如权利要求31至34中任意一项所述的方法，其特征在于，所述接入单元，具体用于：
    若收到所述第二终端设备的共享COT的共享指示信息，采用第二类型的LBT进行信道接入；和/或，
    若未收到所述第二终端设备的共享COT的共享指示信息，采用第一类型的LBT进行信道接入，或不进行LBT。
  36. 如权利要求31至34中任意一项所述的方法，其特征在于，所述接入单元，具体用于根据所述第二终端设备的共享COT的共享指示信息，确定采用第一类型的LBT进行信道接入，或，采用第二类型的LBT进行信道接入，或者，不进行LBT。
  37. 一种共享信道占用时间的终端设备，其特征在于，所述装置包括：处理器、存储器以及网络接口；所述处理器调用所述存储器中的程序，执行上述具体权利要求1至18中任意一项所述的共享信道占用时间的方法，并将执行结果通过所述网络接口发送出去。
  38. 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，安装有所述芯片的设备执行如权利要求1至18中任意一项所述的共享信道占用时间的方法。
  39. 一种计算机可读存储介质，其特征在于，所述计算机可读存储介质上存储有用于上行传输方法的程序，所述用于上行传输方法的程序被处理器执行时实现上述权利要求1至18中任意一项所述的共享信道占用时间的方法。
  40. 一种计算机程序产品，其特征在于，所述计算机程序产品存储于非瞬时性计算机可读存储介质，所述计算机程序被执行时实现如权利要求1至18中任意一项所述的共享信道占用时间的方法。
  41. 一种计算机程序，其特征在于，所述计算机程序所述计算机程序被执行时实现如权利要求1至18中任意一项所述的共享信道占用时间的方法。
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