WO2024032285A1 - Communication method and apparatus - Google Patents
Communication method and apparatus Download PDFInfo
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- WO2024032285A1 WO2024032285A1 PCT/CN2023/105893 CN2023105893W WO2024032285A1 WO 2024032285 A1 WO2024032285 A1 WO 2024032285A1 CN 2023105893 W CN2023105893 W CN 2023105893W WO 2024032285 A1 WO2024032285 A1 WO 2024032285A1
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- capc
- terminal device
- psfch
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- 238000000034 method Methods 0.000 title claims abstract description 150
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W74/00—Wireless channel access
- H04W74/002—Transmission of channel access control information
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W74/00—Wireless channel access
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W74/00—Wireless channel access
- H04W74/08—Non-scheduled access, e.g. ALOHA
- H04W74/0808—Non-scheduled access, e.g. ALOHA using carrier sensing, e.g. carrier sense multiple access [CSMA]
Definitions
- the present application relates to the field of communication technology, and in particular, to a communication method and device.
- data communication between terminal devices can be carried out through network equipment, or communication between terminal equipment can be carried out directly without the help of network equipment.
- the interface between terminal devices can be called the proximity-based services communication 5 (PC5) interface, which is similar to the Uu interface between terminal devices and network devices.
- the link between terminal equipment is called a sidelink (SL).
- the terminal equipment and network equipment When network equipment and terminal equipment transmit on unlicensed spectrum, the terminal equipment and network equipment need to perform a listen before talk (LBT) process before sending data, that is, a channel access process. For example, for uplink hybrid automatic repeat request (HARQ) feedback, the terminal device will perform the LBT process.
- LBT listen before talk
- HARQ uplink hybrid automatic repeat request
- This application provides a communication method and device to clarify how terminal equipment performs LBT in an SL-U scenario and improves the communication quality of SL-U.
- this application provides a communication method, which can be applied to a first terminal device, a functional module in the first terminal device, a processor or chip in the first terminal device, etc.
- the method may include: after the first terminal device determines the first channel access priority class (CAPC), sending the first information to the second terminal device, the The first information is used to indicate the second CAPC.
- the second CAPC is the same as the first CAPC, or the second CAPC is determined based on the first CAPC; the second CAPC is used for the second terminal device for the first physical sidelink
- the feedback channel (physical sidelink feedback channel, PSFCH) performs LBT.
- the second terminal device can perform LBT on the PSFCH based on the CAPC indicated by the first terminal device, so that the CAPC transmitted by the PSFCH can be flexibly adapted to actual service communication requirements and improve the communication quality of the SL-U.
- the first terminal device may determine the first CAPC in the following manner: the first terminal device receives first downlink control information (DCI) from a network device, and the The first DCI is used for scheduling SL resources, and the first DCI indicates the first CAPC. In this way, the first terminal device can determine the CAPC indicated by the first DCI as the first CAPC.
- DCI downlink control information
- the first terminal device may determine the first CAPC in the following manner: the first terminal device may determine the first CAPC according to a first preset rule and a first transport block (TB). Describe the first CAPC. In this way, the first terminal device can determine the first CAPC based on the actual situation.
- the first terminal device determines the first CAPC according to the first preset rule and the first TB.
- the method may be: when the first TB includes at least one media interface When a media access control control element (MAC CE) is entered, the first terminal device may determine that the first CAPC is the CAPC with the highest priority among the CAPCs corresponding to the at least one MAC CE; when the first CAPC is When a TB does not include the at least one MAC CE and includes at least one sidelink control channel service data unit (SCCH SDU), the first terminal device may determine the first The CAPC is the CAPC with the highest priority among the CAPCs corresponding to the at least one SCCH SDU; when the first TB does not include the at least one MAC CE and the at least one SCCH SDU, and includes at least one sidelink service sidelink traffic channel service data unit (STCH SDU), the first terminal device may The first CAPC is determined to be the CAPC with the lowest priority among the CAPCs corresponding to the at least one STCH SDU. Based on
- the first terminal device determines the first CAPC according to the first preset rule and the first TB.
- the method may be: the first terminal device determines the first CAPC. It is the CAPC with the highest priority among the CAPCs corresponding to at least one logical channel (LCH) and/or at least one MAC CE included in the first TB. Based on the above method, the first terminal device can determine the accurate first CAPC in combination with the first preset rule and the first TB, and the implementation complexity of this method is low.
- LCH logical channel
- the first terminal device may determine the first CAPC in the following manner: the first terminal device determines that the CAPC corresponding to the first LCH or the first MAC CE is the first CAPC, so The first LCH or the first MAC CE is used to trigger the first terminal device to select or reselect SL resources, and there is a corresponding relationship between the first LCH or the first MAC CE and the CAPC. Based on the above method, the first terminal device can determine the accurate first CAPC in combination with the logical channel or MAC CE that triggers SL resource selection or reselection.
- the first information may include first indication information, and the first indication information is used to instruct the second CAPC to be used for PSFCH transmission.
- the second CAPC is used for PSFCH transmission, so that the second terminal device performs LBT based on the second CAPC.
- the format of the first information is a first format, and the first format may be used to indicate that the second CAPC is used for PSFCH transmission. In this way, the format of the first information indicates that the second CAPC is used for PSFCH transmission, which can save indication overhead.
- this application provides a communication method, which can be applied to a second terminal device, a functional module in the second terminal device, a processor or chip in the second terminal device, etc.
- the method may include: the second terminal device receives first information from the first terminal device, the first information being used to indicate the second CAPC; subsequently, the second terminal device may LBT is performed on the first PSFCH according to the second CAPC.
- the second terminal device can perform LBT on the PSFCH based on the CAPC indicated by the first terminal device, so that the CAPC transmitted by the PSFCH can be flexibly adapted to actual service communication requirements and improve the communication quality of the SL-U.
- the first information may include first indication information, and the first indication information is used to instruct the second CAPC to be used for PSFCH transmission.
- the second CAPC is used for PSFCH transmission, so that the second terminal device performs LBT based on the second CAPC.
- the format of the first information is a first format, and the first format may be used to indicate that the second CAPC is used for PSFCH transmission. In this way, the format of the first information indicates that the second CAPC is used for PSFCH transmission, which can save indication overhead.
- the first PSFCH is determined based on the mapping relationship between a physical sidelink control channel (PSSCH) and the PSFCH, or the first PSFCH is indicated by the first terminal device.
- PSSCH physical sidelink control channel
- the second terminal equipment can perform LBT on the PSFCH based on the CAPC indicated by the first terminal equipment. This enables the CAPC transmitted by PSFCH to flexibly adapt to actual business communication needs and improve the communication quality of SL-U.
- the second terminal device performs LBT for the first PSFCH according to the second CAPC.
- the method may be: the second terminal device determines the third CAPC according to the second CAPC, and then the The second terminal equipment performs LBT on the first PSFCH according to the third CAPC.
- the second terminal device can flexibly determine the required CAPC to perform LBT on the first PSFCH to flexibly adapt to actual business communication requirements and improve the communication quality of SL-U.
- the second terminal device determines the third CAPC based on the second CAPC.
- the method may be: when the second terminal device determines that the second CAPC is less than or equal to the first threshold, The second terminal device determines the third CAPC; or, when the second terminal device determines that the second CAPC is greater than the first threshold, the second terminal device determines the third CAPC.
- the second terminal device can flexibly determine the required CAPC to perform LBT on the first PSFCH to flexibly adapt to actual business communication requirements and improve the communication quality of SL-U.
- the second terminal device may determine a fourth CAPC based on the second CAPC, and then the second terminal device performs LBT for the second PSFCH based on the fourth CAPC. In this way, when the second terminal device performs LBT on multiple PSFCHs corresponding to one PSSCH, it can use different CAPCs to improve the reliability of PSFCH transmission, thereby improving the overall SL-U communication quality.
- the second terminal device determines the fourth CAPC based on the second CAPC.
- the method may be: the second terminal device may subtract M from the second CAPC to obtain the fourth CAPC.
- CAPC the M is an integer greater than or equal to 1.
- the second terminal device receives second information, and the second information may be used to indicate that the fourth CAPC is determined based on the second CAPC, and the fourth CAPC is determined based on the fourth CAPC.
- the second PSFCH performs LBT. In this way, the second terminal device can determine whether to use different CAPCs for different PSFCHs based on the indication, so that when the same CAPC can be used, the power consumption of determining a new CAPC for each PSFCH transmission is saved.
- this application provides a communication method, which can be applied to a second terminal device, a functional module in the second terminal device, a processor or chip in the second terminal device, etc.
- the method may include: the second terminal device receives sidelink control information (SCI) from the first terminal device, and then the second terminal device determines the SCI When CAPC is not indicated, LBT is performed on the first PSFCH according to the predefined CAPC.
- SCI sidelink control information
- the second terminal device performs LBT for PSFCH based on the predefined CAPC, so that the CAPC for PSFCH transmission does not need to adapt to actual business communication requirements in some cases, and a higher priority CAPC is used for PSFCH transmission. , thereby improving the communication quality of SL-U.
- the first PSFCH may be determined by the second terminal equipment.
- the second terminal device performs LBT on the PSFCH based on the predefined CAPC, which can make the PSFCH transmission
- CAPC does not need to adapt to actual business communication requirements, but uses higher priority CAPC for PSFCH transmission, thereby improving the communication quality of SL-U.
- the second terminal equipment determines a fifth CAPC based on the predefined CAPC, and further, the second terminal equipment can perform LBT for the second PSFCH based on the fifth CAPC. In this way, when the second terminal device performs LBT for multiple PSFCHs, it can use different CAPCs to improve the reliability of PSFCH transmission, thereby improving the overall SL-U communication quality.
- the second terminal device determines the fifth CAPC based on the predefined CAPC.
- the method may be: the second terminal device may subtract S from the predefined CAPC to obtain the In the fifth CAPC, the S is an integer greater than or equal to 1.
- the second terminal device receives third information, the third information is used to indicate that the fifth CAPC is determined based on the predefined CAPC, and the fifth CAPC is determined based on the fifth CAPC.
- the second PSFCH performs LBT. In this way, the second terminal device can determine whether to use different CAPCs for different PSFCHs based on the indication, so that when the same CAPC can be used, the power consumption of determining a new CAPC for each PSFCH transmission is saved.
- the present application also provides a communication device.
- the communication device may be a first terminal device, a processor, a chip or a functional module in the first terminal device.
- the communication device has the ability to implement the above-mentioned first aspect. Or the functions of the first terminal device in each possible design example of the first aspect.
- the functions described can be implemented by hardware, or can be implemented by hardware executing corresponding software.
- the hardware or software includes one or more modules corresponding to the above functions.
- the structure of the communication device includes a transceiver unit and a processing unit. These units can perform the corresponding functions of the first terminal device in the above-mentioned first aspect or each possible design example of the first aspect. For details, see The detailed description in the method example will not be repeated here.
- the structure of the communication device includes a transceiver and a processor, and optionally a memory.
- the transceiver is used to send and receive information or data, and to communicate with other devices in the communication system.
- the processor is configured to support the communication device to perform the corresponding function of the first terminal device in the above-mentioned first aspect or each possible design example of the first aspect.
- the memory is coupled to the processor and holds program instructions and data necessary for the communications device.
- this application also provides a communication device.
- the communication device may be a second terminal device, a processor, a chip or a functional module in the second terminal device.
- the communication device has the ability to implement the above second aspect. or the functionality of the second terminal device in each possible design example of the second aspect.
- the functions described can be implemented by hardware, or can be implemented by hardware executing corresponding software.
- the hardware or software includes one or more modules corresponding to the above functions.
- the structure of the communication device includes a transceiver unit and a processing unit. These units can perform the corresponding functions of the second terminal device in the above second aspect or each possible design example of the second aspect. For details, see Detailed description in method example, No further details will be given here.
- the structure of the communication device includes a transceiver and a processor, and optionally a memory.
- the transceiver is used to send and receive information or data, and to communicate with other devices in the communication system.
- the processor is configured to support the communication device to perform the corresponding function of the second terminal device in the above second aspect or each possible design example of the second aspect.
- the memory is coupled to the processor and holds program instructions and data necessary for the communications device.
- the present application also provides a communication device.
- the communication device may be a second terminal device, a processor, a chip or a functional module in the second terminal device.
- the communication device has the ability to implement the above third aspect. or the functionality of the second terminal device in each possible design example of the third aspect.
- the functions described can be implemented by hardware, or can be implemented by hardware executing corresponding software.
- the hardware or software includes one or more modules corresponding to the above functions.
- the structure of the communication device includes a transceiver unit and a processing unit. These units can perform the corresponding functions of the second terminal device in the above third aspect or each possible design example of the third aspect. For details, see The detailed description in the method example will not be repeated here.
- the structure of the communication device includes a transceiver and a processor, and optionally a memory.
- the transceiver is used to send and receive information or data, and to communicate with other devices in the communication system.
- the processor is configured to support the communication device to perform the corresponding function of the second terminal device in the above third aspect or each possible design example of the third aspect.
- the memory is coupled to the processor and holds program instructions and data necessary for the communications device.
- embodiments of the present application provide a communication system, which may include the first terminal device in the first aspect and each possible design of the first aspect and the second aspect and each possible design of the second aspect. second terminal equipment, etc.; or may include the first terminal equipment, the second terminal equipment, etc. in the above-mentioned third aspect and each possible design of the third aspect.
- embodiments of the present application provide a computer-readable storage medium.
- the computer-readable storage medium stores program instructions. When the program instructions are run on a computer, they cause the computer to execute the first aspect of the embodiments of the application and its operations. Any possible design, or the second aspect and any possible design thereof, or the method described in the third aspect and any possible design thereof.
- computer-readable storage media can be any available media that can be accessed by a computer.
- computer-readable media may include non-transitory computer-readable media, random-access memory (random-access memory, RAM), read-only memory (read-only memory, ROM), electrically erasable memory
- RAM random-access memory
- ROM read-only memory
- programmable read-only memory electrically EPROM, EEPROM
- CD-ROM or other optical disk storage magnetic disk storage media or other magnetic storage devices, or can be used to carry or store the desired program code in the form of instructions or data structures and can Any other media accessed by a computer.
- embodiments of the present application provide a computer program product that includes computer program code or instructions.
- the computer program code or instructions are run on a computer, the first aspect or any of the possible designs of the first aspect are enabled. , or the method described in the above-mentioned second aspect or any possible design of the second aspect, or the above-mentioned third aspect or any possible design of the third aspect is executed.
- the present application also provides a chip, including a processor, the processor being coupled to a memory and configured to read and execute program instructions stored in the memory, so that the chip implements the above first aspect Or in any possible design of the first aspect, or in the above second aspect or any possible design of the second aspect, or in the above third aspect or any possible design of the third aspect, the method described.
- Figure 1 is a schematic diagram of the architecture of a communication system provided by this application.
- FIG. 2 is an architectural schematic diagram of another communication system provided by this application.
- FIG. 3 is an architectural schematic diagram of another communication system provided by this application.
- Figure 4 is a flow chart of a communication method provided by this application.
- FIG. 5 is a flow chart of another communication method provided by this application.
- Figure 6 is a schematic structural diagram of a communication device provided by this application.
- Figure 7 is a structural diagram of a communication device provided by this application.
- Embodiments of this application provide a communication method and device to clarify how a terminal device performs LBT in an SL-U scenario and improve the communication quality of SL-U.
- the method and the device described in this application are based on the same technical concept. Since the principles of solving problems by the method and the device are similar, the implementation of the device and the method can be referred to each other, and the repeated parts will not be repeated.
- data communication between terminal devices can be carried out through network equipment, or communication between terminal equipment can be carried out directly without the help of network equipment.
- Direct communication between terminal equipment and terminal equipment is SL communication.
- SL communication In SL communication, the interface between terminal equipment and terminal equipment is called proximity-based services communication 5 (PC5) interface, and the link between terminal equipment and terminal equipment is called SL. .
- PC5 proximity-based services communication 5
- V2X vehicle-to-everything
- each car is a terminal device, and data can be transmitted directly between terminal devices through SL without going through the network, which can effectively reduce communication delays.
- SL communication supports unicast, multicast, and broadcast.
- mode 1 mode 1
- mode 2 mode 2
- the terminal device obtains SL resources from the network device.
- the network device can schedule SL resources to the terminal device through downlink control information (DCI), or the network device can use radio resource control (RRC) messages.
- DCI downlink control information
- RRC radio resource control
- the terminal device can receive the SL resource pool configuration from the network device, or the terminal device can obtain the SL resource pool configuration from the preconfiguration, and then the terminal device selects the SL resource in the SL resource pool. Among them, the terminal device may select SL resources randomly, or based on the results of sensing or partial sensing.
- SL communication on unlicensed spectrum is called SL-U.
- LBT can also be called the channel access process. Typically LBT is performed at channel (eg, 20 megahertz (MHz)) granularity.
- a communication device Before a communication device sends a signal (for example, a data signal) on a certain channel (for example, a first channel), it may first detect whether the first channel is idle, for example, whether it detects that a nearby communication device is occupying the first channel. To send a signal, this detection process can be called clear channel assessment (CCA) or channel access process.
- CCA clear channel assessment
- Type 1 LBT is a channel access process based on a fixed duration (it can also be called the first type of channel access process).
- the LBT of 2 is the backoff-based channel access process (which can also be called the second type of channel access process).
- CAPC channel occupancy time
- the relationship between CAPC and COT can be shown in Table 1 below.
- the first column in Table 1 represents the CAPC value.
- the fifth column in Table 1 represents the corresponding priority of different CAPC values.
- COT size (unit: ms). It is understandable that the meanings of other columns in Table 1 can refer to existing standards and will not be described in detail here.
- the terminal device may be, for example, the terminal device itself, or a module used to implement the functions of the terminal device, such as a chip or a chip system, and the chip or chip system may be provided in the terminal device.
- Terminal equipment also known as user equipment (UE), mobile station (MS), mobile terminal (MT), etc., is a device that provides voice and/or data connectivity to users. equipment.
- the terminal device may include a handheld device with a wireless connection function, a vehicle-mounted device, etc.
- terminal devices can be: mobile phones, tablets, laptops, PDAs, mobile Internet devices (MID), wearable devices, virtual reality (VR) devices, augmented reality (augmented reality (AR) equipment, XR equipment, MR equipment, wireless terminals in industrial control, wireless terminals in self-driving, wireless terminals in remote medical surgery, intelligent Wireless terminals in the power grid (smart grid), wireless terminals in transportation safety (transportation safety), wireless terminals in smart cities (smart city), or wireless terminals in smart homes (smart home), etc.
- MID mobile Internet devices
- VR virtual reality
- AR augmented reality
- XR equipment XR equipment
- MR equipment augmented reality
- wireless terminals in industrial control wireless terminals in self-driving
- wireless terminals in remote medical surgery intelligent Wireless terminals in the power grid (smart grid), wireless terminals in transportation safety (transportation safety), wireless terminals in smart cities (smart city), or wireless terminals in smart homes (smart home), etc.
- Terminal equipment can also be device-to-device communication (device-to-device, D2D) terminal equipment, Internet of Vehicles V2X communication terminal equipment, smart vehicles, vehicle-to-machine systems (or Internet of Vehicles systems) (telematics box, TBOX), machine to Machine-to-machine/machine-type communications (M2M/MTC) terminal equipment, Internet of things (IoT) terminal equipment.
- the terminal device may be a vehicle, ship or aircraft, or a terminal-type roadside unit, or a communication module or chip built into the vehicle or roadside unit.
- the terminal device can be a vehicle-mounted module.
- the terminal equipment can also be a road side unit (RSU). If the various terminal devices introduced above are located on the vehicle, such as placed or installed in the vehicle, they can be considered as vehicle-mounted terminal equipment.
- the vehicle-mounted terminal equipment is also called an on-board unit (OBU), for example.
- OBU on-board unit
- the terminal device may also be a wearable device.
- Wearable devices can also be called wearable smart devices or smart wearable devices. It 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. wait.
- 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. Used, such as various smart bracelets, smart helmets, smart jewelry, etc. for physical sign monitoring.
- Terminal devices can also be smart devices such as amusement equipment, smart appliances, or drones.
- a terminal device is taken as an example for explanation.
- Network equipment equipment that provides access to terminal equipment.
- Network devices may include radio access network (RAN) devices, such as base stations.
- RAN radio access network
- Network equipment may also refer to equipment that communicates with terminal equipment over the air interface.
- the network equipment may include an evolved base station (evolved Node B, which may be referred to as eNB or e-NodeB) in the LTE system or long term evolution-advanced (LTE-A).
- eNB evolved Node B
- e-NodeB evolved base station
- LTE-A long term evolution-advanced
- eNB is a device deployed in a wireless access network that meets the fourth generation (the fourth generation, 4G) standards of mobile communication technology to provide wireless communication functions for terminal equipment.
- the network device can also be a new radio controller (NR controller), it can be a (gNode B, gNB) in the 5G system, it can be a centralized network element (centralized unit), it can be a new wireless base station, it can be
- the radio frequency remote module can be a micro base station (also called a small station), a relay, a distributed unit, various forms of macro base stations, or a transmission and reception point. (transmission reception point, TRP), transmission measurement function (TMF), transmission point (transmission point, TP) or any other wireless access equipment, the embodiments of the present application are not limited thereto.
- Network devices may also include radio network controller (RNC), Node B (Node B, NB), base station controller (BSC), base station Transceiver station (base transceiver station, BTS), home base station (for example, home evolved NodeB, or home Node B, HNB), base band unit (base band unit, BBU) or remote radio unit (RRU), or Wireless fidelity (Wifi) access point (AP), or baseband pool (BBU pool) and RRU in cloud radio access network (cloud radio access netowrk, CRAN), etc.
- RNC radio network controller
- Node B Node B
- BSC base station Controller
- BTS base station Transceiver station
- BTS home base station
- base station for example, home evolved NodeB, or home Node B, HNB
- base band unit base band unit
- RRU remote radio unit
- Wifi) access point AP
- BBU pool baseband pool
- cloud radio access netowrk cloud radio access netowrk, CRAN
- the base station in the embodiment of the present application may include a centralized unit (CU) and a distributed unit (DU), and multiple DUs may be centrally controlled by one CU.
- CU and DU can be divided according to the protocol layer functions of the wireless network they possess. For example, the functions of the packet data convergence protocol (PDCP) layer and above are set in CU and the protocol layer below PDCP, such as wireless link. Functions such as the radio link control (RLC) layer and the medium access control (medium access control, MAC) layer are set in the DU. It should be noted that this division of protocol layers is just an example, and division can also be performed on other protocol layers.
- PDCP packet data convergence protocol
- RLC radio link control
- MAC medium access control
- the radio frequency device can be remote and not placed in the DU, or it can be integrated in the DU, or partially remote and partially integrated in the DU.
- the control plane (CP) and user plane (UP) of the CU can also be separated and implemented into different entities, respectively control plane CU entities (CU-CP entities). and user plane CU entities (CU-UP entities).
- CU-CP entities control plane CU entities
- CU-UP entities user plane CU entities
- the signaling generated by the CU can be sent to the terminal device through the DU, or the signaling generated by the UE can be sent to the CU through the DU.
- the DU may directly encapsulate the signaling through the protocol layer and transparently transmit it to the terminal device or CU without parsing the signaling.
- the CU is divided into network equipment on the RAN side.
- the CU can also be divided into network equipment on the core network (core network, CN) side. This application does not limit this.
- the network device may also be a central processing unit (central processing element, CPE), router, etc.
- CPE central processing element
- the network device can also be a functional module, chip or chip system.
- the functional module, chip or chip system can be disposed in the network device.
- At least one (species) refers to one (species) or multiple (species), and multiple (species) refers to two (species) or more than two (species).
- At least one of the following" or similar expressions thereof refers to any combination of these items, including any combination of single or plural items.
- at least one of a, b, or c can mean: a, b, c, a and b, a and c, b and c, or a, b and c, where a, b, c Can be single or multiple.
- the communication method provided by the embodiments of this application can be applied to various communication systems.
- the communication method provided by this application can be applied to long term evolution (long term evolution, LTE) system, fifth generation (5th generation, 5G) communication system (such as new wireless (new radio, NR) system), next-generation wireless LAN system, and future sixth generation (6th generation, 6G) communication system or other systems.
- FIG 1 shows the architecture of a possible communication system to which the communication method provided by this application is applicable.
- the communication system may include a network device and at least two terminal devices.
- the at least two terminal devices may be as shown in Figure 1 first terminal device and second terminal device.
- the Uu interface is used for communication between the first terminal device and the network device.
- the first terminal device and the second terminal device use the unlicensed spectrum for SL communication and use the PC5 interface for communication.
- the first terminal device and the second terminal device can work in mode 1 or mode 2, that is, the first terminal device and the second terminal device can obtain SL resources in mode 1 or mode 2.
- the communication between the first terminal device and the second terminal device may be unicast communication or multicast communication, which is not limited in this application.
- the first terminal device is the sender of data
- the second terminal device is the receiver of data
- the second terminal device can perform a physical sidelink feedback channel (PSFCH) to the first terminal device. )transmission.
- PSFCH physical sidelink feedback channel
- the communication system shown in Figure 1 is only an exemplary illustration and is not intended to limit the communication system of the present application.
- the communication system may also include other devices, which are not limited in this application.
- FIG. 2 shows the architecture of another possible communication system to which the communication method provided by this application is applicable.
- the communication system may include remote terminal equipment (remote UE), relay terminal equipment (relay UE), network equipment, etc.
- the communication system can be applied to UE-relay -Network communication scenario, that is, the remote terminal device accesses the network through the relay terminal device.
- the communication between the remote terminal equipment and the relay terminal equipment is SL communication, and the remote terminal equipment and the relay terminal equipment can use unlicensed spectrum for SL communication.
- the communication system shown in FIG. 2 is not limited to only include the devices shown in FIG. 2 , but may also include other devices not shown in FIG. 2 , which will not be listed one by one in this application.
- FIG 3 shows the architecture of another possible communication system to which the communication method provided by this application is applicable.
- the communication system can include at least three terminal devices, such as the source terminal equipment (source UE) shown in Figure 3, the middle Relay terminal equipment (relay UE), target terminal equipment (target UE), etc.
- the communication system can be applied to a UE-UE-UE relay communication scenario, that is, the source terminal device communicates with the target terminal device through the relay terminal device.
- the communication between the source terminal device and the relay terminal device is SL communication, and the source terminal device and the relay terminal device can use unlicensed spectrum for SL communication.
- the communication between the relay terminal equipment and the target terminal equipment is SL communication, and the relay terminal equipment and the target terminal equipment can use unlicensed spectrum for SL communication.
- the communication system shown in FIG. 3 is not limited to only include the devices shown in FIG. 3 , but may also include other devices not shown in FIG. 3 , which will not be listed one by one in this application.
- SL-U when SL HARQ feedback is transmitted on the PSFCH, there is currently no clear method for the terminal equipment to perform the LBT process, which may affect the communication quality of SL-U. Based on this, embodiments of this application provide a communication method to clarify how the terminal device performs LBT in the SL-U scenario and improve the communication quality of SL-U.
- the communication method provided by this application is described in detail by taking terminal equipment and network equipment as examples. It should be understood that the operations performed by the terminal equipment can also be performed by the processor in the terminal equipment, or by the chip. Or a chip system, or a functional module, etc. The operations performed by the network device can also be implemented by a processor in the network device, or a chip or chip system, or a functional module, etc. This application is not limited to this.
- Step 401 The first terminal device determines the first CAPC.
- the first terminal device may determine the first CAPC through the following method:
- Method a1 The first terminal device receives a first DCI from the network device, the first DCI is used to schedule SL resources, and the first DCI indicates the first CAPC.
- the first terminal device can perform SL transmission based on dynamic grant (DG). That is, the first terminal device works in mode 1, and the network device schedules SL resources to the first terminal device through the first DCI.
- DG dynamic grant
- the first DCI when the first DCI indicates the first CAPC, it can be implemented by including the first CAPC in the first DCI, or it can be implemented by including information indicating the first CAPC in the first DCI, or it can also be implemented in other ways. There are no restrictions on application.
- Method a2 The first terminal device determines the first CAPC according to the first preset rule and the first transport block (TB).
- the first terminal device may perform SL transmission based on configured grant (CG). That is, the first terminal device works in mode 1, and the network device configures SL configuration authorization for the first terminal device through an RRC message.
- CG configured grant
- the first terminal device may perform SL transmission based on mode2.
- the first TB may be the TB when the first terminal device performs SL transmission.
- the first TB may be the TB when the first terminal device performs SL transmission to the second terminal device.
- the first terminal device determines the first CAPC according to the first preset rule and the first TB.
- the method may be as follows:
- Method b1 When the first TB includes at least one media access control control element (MAC CE), the first terminal device determines the first CAPC as the highest priority among the CAPCs corresponding to at least one MAC CE.
- CAPC when the first TB does not include at least one MAC CE and includes at least one sidelink control channel service data unit (SCCH SDU), the first terminal device determines that the first CAPC is at least The CAPC with the highest priority among the CAPCs corresponding to one SCCH SDU; when the first TB does not include at least one MAC CE and at least one SCCH SDU, and includes at least one sidelink traffic channel service data unit (sidelink traffic channel service data unit) , STCH SDU), the first terminal device determines the first CAPC to be the CAPC with the lowest priority among the CAPCs corresponding to at least one STCH SDU or at least one logical channel (logical channel, LCH).
- SCCH SDU sidelink control channel service data unit
- the first terminal device can determine that the first CAPC is the lowest priority among the CAPCs corresponding to at least one STCH SDU.
- CAPC or the first terminal device may also determine the first CAPC as the CAPC with the lowest priority among the CAPCs corresponding to at least one LCH.
- the value of CAPC with higher priority is smaller, and the value of CAPC with lower priority is larger.
- the LCH can be SCCH or STCH.
- One SCCH SDU can correspond to one LCH
- one STCH SDU can correspond to one LCH.
- the LCH corresponding to SCCH SDU is different from the LCH corresponding to STCH SDU.
- Method b2 The first terminal device determines the first CAPC as the CAPC with the highest priority among the CAPCs corresponding to at least one LCH and/or at least one MAC CE included in the first TB.
- the first CAPC may be the CAPC with the highest priority among the CAPCs corresponding to at least one LCH, or the first CAPC may be the CAPC with the highest priority among the CAPCs corresponding to at least one MAC CE, or the first CAPC may be The CAPC with the highest priority among the CAPCs corresponding to at least one LCH and at least one MAC CE.
- At least one LCH may correspond to at least one SCCH SDU, or may correspond to at least one STCH SDU, or may correspond to at least one SCCH SDU and at least one STCH SDU.
- the first TB containing at least one LCH may be understood to mean that the first TB contains at least one LCH data or at least one LCH information.
- Method a3 The first terminal device determines that the CAPC corresponding to the first LCH or the first MAC CE is the first CAPC.
- the first LCH or the first MAC CE is used to trigger the first terminal device to select or reselect the SL resource.
- the first terminal device may perform SL transmission based on mode2.
- the first terminal device selects or reselects the SL resource. It may select or reselect from the same SL resource pool as the previously selected SL resource, or it may select or reselect from a different SL resource pool.
- Step 402 The first terminal device sends the first information to the second terminal device.
- the second terminal device receives the first information from the first terminal device.
- the first information is used to indicate the second CAPC
- the second CAPC is used to indicate the second CAPC.
- the second terminal equipment performs LBT on the first PSFCH.
- the second CAPC is the same as the first CAPC.
- the second CAPC is determined based on the first CAPC, and the second CAPC is different from the first CAPC.
- the second CAPC when the second CAPC is determined based on the first CAPC, the second CAPC may be the value obtained by subtracting N from the first CAPC, where N is an integer greater than or equal to 1.
- the second CAPC when the value obtained by subtracting N from the first CAPC is less than 1, the second CAPC may be 1.
- the first information is used to indicate the second CAPC, which can be implemented by including the second CAPC in the first information, or by including information indicating the second CAPC in the first information, or it can also be implemented in other ways, This application does not limit this.
- the first information may be sidelink control information (SCI).
- SCI sidelink control information
- the first information may also indicate that the second CAPC is used for PSFCH transmission. Specifically, it can be indicated in the following two ways:
- the first information includes first indication information, and the first indication information is used to instruct the second CAPC to be used for PSFCH transmission.
- the first indication information may be a dedicated field in the SCI.
- the format of the first information is the first format, and the first format is used to indicate that the second CAPC is used for PSFCH transmission.
- the first information is the SCI
- the SCI indicating that the second CAPC is used for PSFCH transmission is in a different format than the SCI carrying SL COT sharing.
- Step 403 The second terminal device performs LBT on the first PSFCH according to the second CAPC.
- the first PSFCH may be determined based on the mapping relationship between a physical sidelink control channel (PSSCH) and the PSFCH, or the first PSFCH may be indicated by the first terminal device.
- PSSCH physical sidelink control channel
- the second terminal equipment may be based on the CAPC indicated by the first terminal equipment. LBT for PSFCH can enable the CAPC transmitted by PSFCH to flexibly adapt to actual business communication needs and improve the communication quality of SL-U.
- the following method when the second terminal device performs LBT for the first PSFCH according to the second CAPC, the following method may be included:
- Method d1 The second terminal device directly performs LBT on the first PSFCH according to the second CAPC.
- the second terminal device does not process the second CAPC and can directly use the second CAPC.
- Method d2 The second terminal device determines the third CAPC based on the second CAPC, and further, the second terminal device performs LBT on the first PSFCH based on the third CAPC.
- the second terminal device determines that the second CAPC is less than or equal to the first threshold.
- the second terminal device determines that the second CAPC is less than or equal to the first threshold.
- Three CAPC alternatively, when the second terminal device determines that the second CAPC is greater than the first threshold, the second terminal device determines the third CAPC.
- the third CAPC determined by the second terminal device when the second CAPC is less than or equal to the first threshold is different from the third CAPC determined by the second terminal device when the second CAPC is greater than the first threshold.
- the first threshold, the third CAPC determined by the second terminal device when the second CAPC is less than or equal to the first threshold, and the third CAPC determined by the second terminal device when the second CAPC is greater than the first threshold may be predetermined. Defined, or can be configured for the network device, or configured for the first terminal device, or can be determined by the second terminal device itself.
- the same CAPC when the second terminal device performs LBT for multiple PSFCHs, the same CAPC can be used, for example, the above-mentioned second CAPC is used.
- the first PSFCH may be any PSFCH among multiple PSFCHs corresponding to the same PSSCH transmission, for example, it may be the first PSFCH or other PSFCH, which is not limited in this application.
- different CAPCs can also be used, so that subsequent PSFCH executions of LBT use higher priority CAPCs to improve the reliability of PSFCH transmission. , thereby improving the overall SL-U communication quality.
- the second terminal device may determine the fourth CAPC according to the second CAPC, and then the second terminal device may perform LBT on the second PSFCH according to the fourth CAPC.
- the second PSFCH may be a certain PSFCH after the first PSFCH.
- the first PSFCH is the first PSFCH among multiple PSFCHs
- the second PSFCH may be the second PSFCH among the multiple PSFCHs
- the second PSFCH may be the second PSFCH among the plurality of PSFCHs.
- the second terminal device subtracts M from the second CAPC to obtain the fourth CAPC, where M is an integer greater than or equal to 1.
- the corresponding M value is different.
- the first PSFCH is the first PSFCH
- the second PSFCH is the second PSFCH
- the corresponding M value can be A
- the second PSFCH is the third PSFCH
- the corresponding M value is 2A
- A is an integer greater than or equal to 1. It should be understood that the description here only takes the first PSFCH as the first PSFCH as an example, and does not limit which PSFCH among the plurality of PSFCHs the first PSFCH is.
- the CAPC corresponding to each subsequent PSFCH is the CAPC corresponding to the previous PSFCH minus A.
- the CAPC corresponding to the first PSFCH among the multiple PSFCHs can be used as the initial CAPC, and the CAPC corresponding to each PSFCH after the first PSFCH can be the CAPC corresponding to the previous PSFCH.
- Minus A when the first PSFCH is the first PSFCH among multiple PSFCHs, the initial CAPC may be the second CAPC.
- the above subtraction operation is performed when the CAPC corresponding to the previous PSFCH is greater than 1. That is to say, when the CAPC corresponding to a certain PSFCH is less than or equal to 1, the subsequent PSFCH will no longer perform the above subtraction operation, and the CAPC corresponding to the subsequent PSFCH can all use 1.
- the above is an example based on the CAPC corresponding to the first PSFCH being the second CAPC.
- the next PSFCH after the first PSFCH The corresponding CAPC can be obtained by subtracting A from the third CAPC.
- the initial CAPC may be the third CAPC
- the CAPC corresponding to the next PSFCH (that is, the second PSFCH) may be the third CAPC minus A.
- the second terminal device when the second terminal device fails to perform LBT on the first PSFCH, the second terminal device performs LBT on the second PSFCH.
- the second terminal device when the second terminal device successfully performs LBT on the first PSFCH, the second terminal device may also perform LBT on the second PSFCH, which is not limited in this application.
- the second terminal device receives second information, and the second information is used to indicate determining the fourth CAPC based on the second CAPC, and performing LBT for the second PSFCH based on the fourth CAPC. That is, the second information indicates that the CAPC corresponding to the second PSFCH is determined based on the CAPC corresponding to the first PSFCH, and the second terminal device performs the above-mentioned subtraction operation after receiving the second information.
- the second terminal device may receive the second information from the network device, or may also receive the second information from the first terminal device.
- the second terminal device can perform LBT on the PSFCH based on the CAPC indicated by the first terminal device, which can make the CAPC transmitted by the PSFCH flexibly adapt to actual business communication requirements and improve the performance of SL-U. Communication quality.
- FIG. 5 Another communication method provided by the embodiment of the present application can be seen as shown in FIG. 5 .
- the process of this method can include:
- Step 501 The second terminal device receives the SCI from the first terminal device.
- Step 502 When the second terminal device determines that the SCI does not indicate CAPC, it performs LBT on the first PSFCH according to the predefined CAPC.
- the first PSFCH may be determined by the second terminal device, and the manner in which the second terminal device determines the first PSFCH is not limited in this application.
- the second terminal device performs LBT on the PSFCH based on the predefined CAPC. This allows the CAPC for PSFCH transmission to be used in some cases without adapting to actual business communication requirements, and uses higher priority CAPC for PSFCH transmission, thus improving the communication quality of SL-U.
- the same CAPC when the second terminal device performs LBT for multiple PSFCHs, the same CAPC may be used, for example, the above-mentioned predefined CAPC may be used.
- the first PSFCH may be any PSFCH among multiple PSFCHs corresponding to the same PSSCH transmission, for example, it may be the first PSFCH or other PSFCH, which is not limited in this application.
- different CAPCs can also be used, so that subsequent PSFCH executions of LBT use higher priority CAPCs to improve the reliability of PSFCH transmission. , thereby improving the overall SL-U communication quality.
- the second terminal device determines the fifth CAPC according to the predefined CAPC, and then the second terminal device performs LBT on the second PSFCH according to the fifth CAPC.
- the second PSFCH may be a certain PSFCH after the first PSFCH.
- the first PSFCH is the first PSFCH among multiple PSFCHs
- the second PSFCH may be the second PSFCH among the multiple PSFCHs
- the second PSFCH may be the second PSFCH among the plurality of PSFCHs.
- the second terminal device can subtract S from the predefined CAPC to obtain the fifth CAPC, where S is an integer greater than or equal to 1.
- the corresponding S value is different.
- the first PSFCH is the first PSFCH
- the second PSFCH is the second PSFCH
- the corresponding S value can be B
- the second PSFCH is the third PSFCH
- the corresponding M value is 2B
- B is an integer greater than or equal to 1. It should be understood that the description here only takes the first PSFCH as the first PSFCH as an example, and does not limit which PSFCH among the plurality of PSFCHs the first PSFCH is.
- the CAPC corresponding to each subsequent PSFCH is the CAPC corresponding to the previous PSFCH minus B.
- the CAPC corresponding to the first PSFCH among the multiple PSFCHs can be used as the initial CAPC, and the CAPC corresponding to each PSFCH after the first PSFCH can be the CAPC corresponding to the previous PSFCH.
- Minus B when the first PSFCH is the first PSFCH among multiple PSFCHs, the initial CAPC may be a predefined CAPC.
- the above subtraction operation is performed when the CAPC corresponding to the previous PSFCH is greater than 1. That is to say, when the CAPC corresponding to a certain PSFCH is less than or equal to 1, the subsequent PSFCH will no longer perform the above subtraction operation, and the CAPC corresponding to the subsequent PSFCH can all use 1.
- the second terminal device when the second terminal device fails to perform LBT on the first PSFCH, the second terminal device performs LBT on the second PSFCH.
- the second terminal device when the second terminal device successfully performs LBT on the first PSFCH, the second terminal device may also perform LBT on the second PSFCH, which is not limited in this application.
- the second terminal device receives the third information, and the third information is used to instruct to determine the fifth CAPC based on the predefined CAPC, and perform LBT for the second PSFCH according to the fifth CAPC. That is, the third information indicates that the CAPC corresponding to the second PSFCH is determined based on the predefined CAPC, and the second terminal device performs the above-mentioned subtraction S operation after receiving the third information.
- the second terminal device may receive the third information from the network device, or may also receive the third information from the first terminal device.
- the second terminal device performs LBT for PSFCH based on the predefined CAPC, which can make the CAPC of PSFCH transmission not need to adapt to the actual business communication requirements in some cases, but use higher The priority CAPC performs PSFCH transmission, thereby improving the communication quality of SL-U.
- the second terminal device receives the first information indicating the second CAPC from the first terminal device, and subsequently the second terminal device can select a CAPC from the second CAPC and the predefined CAPC to target the first CAPC.
- a PSFCH performs LBT. For example, when the first PSFCH is determined based on the mapping relationship between PSSCH and PSFCH, or when the first PSFCH is indicated by the first terminal device, the second terminal device selects the second CAPC. For another example, when the first PSFCH may be determined by the second terminal device, the second terminal device may select a predefined CAPC.
- the second terminal device can also select a CAPC through other methods, which is not limited in this application.
- the first PSFCH may be any one of the multiple PSFCHs corresponding to the same PSSCH transmission, for example, it may be the first PSFCH or Other PSFCHs are not limited in this application.
- the second terminal device performs LBT for multiple PSFCHs, the same CAPC, different CAPC can also be used. For specific methods, please refer to the description of the above embodiment, and will not be introduced in detail here.
- the SL transmission may be for the first terminal device or for other terminal devices.
- the terminal equipment can determine to use the CAPC corresponding to the TB transmitted by the SL to perform LBT on the first PSFCH.
- the communication device 600 may include a transceiver unit 601 and a processing unit 602 .
- the transceiver unit 601 is used for communicating with the communication device 600 , such as receiving information, messages or data, etc., or sending information, messages or data, etc.
- the processing unit 602 is used for processing the communication device 600 . Actions are controlled and managed.
- the processing unit 602 can also control the steps performed by the transceiver unit 601.
- the communication device 600 may be the first terminal device in the above embodiment, a processor of the first terminal device, a chip, a chip system, a functional module, etc.
- the communication device 600 may specifically be the second terminal device in the above embodiment, a processor of the second terminal device, or a chip, or a chip system, or a functional module, etc.
- the processing unit 602 can be used to determine the first CAPC; the transceiver unit 601 can Used to send first information to the second terminal device, the first information being used to indicate a second CAPC, the second CAPC is the same as the first CAPC, or the second CAPC is determined based on the first CAPC ;
- the second CAPC is used for the second terminal equipment to perform listen-before-talk LBT for the first physical sidelink feedback channel PSFCH.
- the processing unit 602 may be configured to: control the transceiver unit 601 to receive the first downlink control information DCI from the network device, where the first DCI is used for the scheduling side. Link SL resource, the first DCI indicates the first CAPC.
- the processing unit 602 may be configured to: determine the first CAPC according to the first preset rule and the first transmission block TB.
- the processing unit 602 may be used to:
- the first TB includes at least one media access control control element MAC CE
- the first TB does not include the at least one MAC CE and includes at least one sidelink control channel service data unit SCCH SDU
- it is determined that the first CAPC is the CAPC corresponding to the at least one SCCH SDU.
- the first TB does not include the at least one MAC CE and the at least one SCCH SDU and includes at least one sidelink service channel service data unit STCH SDU
- the processing unit 602 may be configured to: determine that the first CAPC is included in the first TB.
- the processing unit 602 may be used to: determine that the CAPC corresponding to the first LCH or the first MAC CE is the first CAPC, and the first LCH or the first MAC CE is the first CAPC.
- a MAC CE is used to trigger the first terminal device to select or reselect SL resources, and there is a corresponding relationship between the first LCH or the first MAC CE and the CAPC.
- the first information includes first indication information
- the first indication information is used to instruct the second CAPC to be used for PSFCH transmission.
- the format of the first information is a first format
- the first format is used to indicate that the second CAPC is used for PSFCH transmission.
- the transceiver unit 601 can be used to receive the first information from the first terminal device, The first information is used to indicate the second CAPC; the processing unit 602 may be configured to perform listen-before-talk LBT for the first physical sidelink feedback channel PSFCH according to the second CAPC.
- the first information may include first indication information, and the first indication information is used to instruct the second CAPC to be used for PSFCH transmission.
- the format of the first information may be a first format, and the first format is used to indicate that the second CAPC is used for PSFCH transmission.
- the first PSFCH may be determined based on the mapping relationship between the physical sidelink shared channel PSSCH and the PSFCH, or, The first PSFCH may be indicated by the first terminal equipment.
- the processing unit 602 when performing LBT on the first PSFCH according to the second CAPC, may be configured to: determine a third CAPC according to the second CAPC; CAPC performs LBT on the first PSFCH.
- the processing unit 602 may be configured to: determine the third CAPC when determining that the second CAPC is less than or equal to a first threshold; or , when it is determined that the second CAPC is greater than the first threshold, the third CAPC is determined.
- the processing unit 602 may also be configured to: determine a fourth CAPC according to the second CAPC; and perform LBT for the second PSFCH according to the fourth CAPC.
- the processing unit 602 may be used to: subtract M from the second CAPC to obtain the fourth CAPC, where M is greater than or equal to an integer of 1.
- the transceiver unit 601 may also be configured to receive second information, the second information being used to indicate that the fourth CAPC is determined based on the second CAPC, and the fourth CAPC is determined based on the fourth CAPC. LBT is performed on the second PSFCH.
- the transceiver unit 601 can be used to receive a side link from the first terminal device.
- Control information SCI the processing unit 602 may be configured to perform listen-before-talk LBT based on the predefined CAPC for the first physical sidelink feedback channel PSFCH when it is determined that the SCI does not indicate the channel access priority type CAPC.
- the first PSFCH may be determined by the second terminal equipment.
- the processing unit 602 may be further configured to: determine a fifth CAPC according to the predefined CAPC; and perform LBT for the second PSFCH according to the fifth CAPC.
- the processing unit 602 may be used to: subtract S from the predefined CAPC to obtain the fifth CAPC, where S is greater than Or an integer equal to 1.
- the transceiver unit 601 may also be configured to receive third information, and the third information may be used to indicate that the fifth CAPC is determined based on the predefined CAPC, and the fifth CAPC is determined based on the predefined CAPC.
- Five CAPCs perform LBT on the second PSFCH.
- each functional unit in the embodiment of the present application can be integrated into one processing unit, or each unit can exist physically alone, or two or more units can be integrated into one unit.
- the above integrated units can be implemented in the form of hardware or software functional units.
- the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it may be stored in a computer-readable storage medium.
- the technical solution of the present application is essentially or contributes to the existing technology, or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium , including several instructions to cause a computer device (which can be a personal computer, a server, or a network device, etc.) or a processor to execute all or part of the steps of the methods described in various embodiments of the application.
- the aforementioned storage media include: U disk, mobile hard disk, read-only memory (ROM), random access memory (RAM), magnetic disk or optical disk and other media that can store program code. .
- the communication device 700 may include a transceiver 701 and a processor 702 .
- the communication device 700 may also include a memory 703.
- the memory 703 may be disposed inside the communication device 700 or may be disposed outside the communication device 700 .
- the processor 702 can control the transceiver 701 to receive and send messages, information, messages or data, etc.
- the processor 702 may be a central processing unit (CPU), a network processor (NP) or a combination of CPU and NP.
- the processor 702 may further include a hardware chip.
- the above-mentioned hardware chip can be an application-specific integrated circuit (ASIC), a programmable logic device (PLD) or a combination thereof.
- the above-mentioned PLD can be a complex programmable logic device (CPLD), a field-programmable gate array (FPGA), a general array logic (GAL) or any combination thereof.
- the transceiver 701, the processor 702 and the memory 703 are connected to each other.
- the transceiver 701, the processor 702 and the memory 703 are connected to each other through a bus 704;
- the bus 704 may be a Peripheral Component Interconnect (PCI) bus or an extended industry standard Structure(Extended Industry Standard Architecture, EISA) bus, etc.
- PCI Peripheral Component Interconnect
- EISA Extended Industry Standard Architecture
- the bus can be divided into address bus, data bus, control bus, etc. For ease of presentation, only one thick line is used in Figure 7, but it does not mean that there is only one bus or one type of bus.
- the memory 703 is used to store programs, etc.
- the program may include program code including computer operating instructions.
- the memory 703 may include RAM, and may also include non-volatile memory (non-volatile memory), such as one or more disk memories.
- the processor 702 executes the application program stored in the memory 703 to implement the above functions, thereby realizing the functions of the communication device 700 .
- the communication device 700 may be the first terminal device in the above embodiment; it may also be the second terminal device in the above embodiment.
- the transceiver 701 can implement the sending and receiving operations performed by the first terminal device in the above embodiment;
- the processor 702 can implement other operations other than the sending and receiving operations performed by the first terminal device in the above embodiments.
- the relevant descriptions please refer to the relevant descriptions in the embodiment shown in FIG. 4 , and will not be introduced in detail here.
- the transceiver 701 can implement the sending and receiving operations performed by the second terminal device in the above embodiment.
- the processor 702 may implement other operations other than the sending and receiving operations performed by the second terminal device in the above embodiment.
- the transceiver 701 can implement the sending and receiving operations performed by the second terminal device in the above embodiment.
- the processor 702 may implement other operations other than the sending and receiving operations performed by the second terminal device in the above embodiment.
- embodiments of the present application provide a communication system, which may include the first terminal device and the second terminal device involved in the above embodiments.
- Embodiments of the present application also provide a computer-readable storage medium.
- the computer-readable storage medium is used to store a computer program.
- the computer program When the computer program is executed by a computer, the computer can implement the implementation shown in Figure 4 or Figure 5. Example method provided.
- An embodiment of the present application also provides a computer program product.
- the computer program product is used to store a computer program.
- the computer program When the computer program is executed by a computer, the computer can implement the method provided by the embodiment shown in Figure 4 or Figure 5. .
- An embodiment of the present application also provides a chip, including a processor, which is coupled to a memory and configured to call a program in the memory so that the chip implements the method provided by the embodiment shown in Figure 4 or Figure 5. .
- An embodiment of the present application also provides a chip, the chip is coupled to a memory, and the chip is used to implement the method provided by the embodiment shown in FIG. 4 or FIG. 5 .
- embodiments of the present application may be provided as methods, systems, or computer program products. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment that combines software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) having computer-usable program code embodied therein.
- computer-usable storage media including, but not limited to, disk storage, CD-ROM, optical storage, etc.
- These computer program instructions may also be stored in a computer-readable memory that causes a computer or other programmable data processing apparatus to operate in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including the instruction means, the instructions
- the device implements the functions specified in a process or processes of the flowchart and/or a block or blocks of the block diagram.
- These computer program instructions may also be loaded onto a computer or other programmable data processing device, causing a series of operating steps to be performed on the computer or other programmable device to produce computer-implemented processing, thereby executing on the computer or other programmable device.
- Instructions provide steps for implementing the functions specified in a process or processes of a flowchart diagram and/or a block or blocks of a block diagram.
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Abstract
A communication method and apparatus. The method comprises: a first terminal device determines a first channel access priority class (CAPC) and then transmits, to a second terminal device, first information for indicating a second CAPC, wherein the second CAPC is the same as the first CAPC, or the second CAPC is determined on the basis of the first CAPC; and the second CAPC is used by the second terminal device to perform listen before talk (LBT) on a first physical sidelink feedback channel (PSFCH). According to the method, the second terminal device can perform LBT on a PSFCH on the basis of a CAPC indicated by the first terminal device, so that the CAPC transmitted by the PSFCH can be flexibly adapted to actual service communication requirements, and the communication quality of a sidelink unlicensed spectrum (SL-U) is improved.
Description
相关申请的交叉引用Cross-references to related applications
本申请要求在2022年08月08日提交中国专利局、申请号为202210942139.2、申请名称为“一种通信方法及装置”的中国专利申请的优先权,其全部内容通过引用结合在本申请中。This application claims priority to the Chinese patent application filed with the China Patent Office on August 8, 2022, with the application number 202210942139.2 and the application title "A communication method and device", the entire content of which is incorporated into this application by reference.
本申请涉及通信技术领域,尤其涉及一种通信方法及装置。The present application relates to the field of communication technology, and in particular, to a communication method and device.
在无线通信系统中,终端设备与终端设备之间可以通过网络设备进行数据通信,也可以不借助网络设备,直接进行终端设备与终端设备之间的通信。终端设备与终端设备之间的接口可以称为基于临近的服务通信5((proximity-based services,ProSe)communication 5,PC5)接口,类似于终端设备与网络设备之间的Uu接口。终端设备与终端设备之间的链路称为侧行链路(sidelink,SL)。In a wireless communication system, data communication between terminal devices can be carried out through network equipment, or communication between terminal equipment can be carried out directly without the help of network equipment. The interface between terminal devices can be called the proximity-based services communication 5 (PC5) interface, which is similar to the Uu interface between terminal devices and network devices. The link between terminal equipment is called a sidelink (SL).
网络设备和终端设备在非授权频谱上传输时,终端设备和网络设备在发送数据之前,需要进行先听后说(listen before talk,LBT)过程,也即进行信道接入过程。例如,针对上行混合自动重传请求(hybrid automatic repeat request,HARQ)反馈,终端设备会进行LBT过程。When network equipment and terminal equipment transmit on unlicensed spectrum, the terminal equipment and network equipment need to perform a listen before talk (LBT) process before sending data, that is, a channel access process. For example, for uplink hybrid automatic repeat request (HARQ) feedback, the terminal device will perform the LBT process.
在侧行非授权频谱(sidelink on unlicensed spectrum,SL-U)中,针对SL HARQ反馈在PSFCH上传输时,目前还没有明确终端设备进行LBT过程的方法,可能会影响SL-U的通信质量。In the sidelink on unlicensed spectrum (SL-U), when SL HARQ feedback is transmitted on the PSFCH, there is currently no clear method for the terminal equipment to perform the LBT process, which may affect the communication quality of SL-U.
发明内容Contents of the invention
本申请提供一种通信方法及装置,用以明确SL-U场景下,终端设备如何进行LBT,提升SL-U的通信质量。This application provides a communication method and device to clarify how terminal equipment performs LBT in an SL-U scenario and improves the communication quality of SL-U.
第一方面,本申请提供了一种通信方法,该方法可以应用于第一终端设备、第一终端设备中的一个功能模块、第一终端设备中的处理器或芯片等。以应用于第一终端设备为例,该方法可以包括:第一终端设备确定第一信道接入优先级类型(channel access priority class,CAPC)后,向第二终端设备发送第一信息,所述第一信息用于指示第二CAPC。其中,所述第二CAPC与所述第一CAPC相同,或者所述第二CAPC基于所述第一CAPC确定;所述第二CAPC用于所述第二终端设备针对第一物理侧行链路反馈信道(physical sidelink feedback channel,PSFCH)进行LBT。In a first aspect, this application provides a communication method, which can be applied to a first terminal device, a functional module in the first terminal device, a processor or chip in the first terminal device, etc. Taking application to the first terminal device as an example, the method may include: after the first terminal device determines the first channel access priority class (CAPC), sending the first information to the second terminal device, the The first information is used to indicate the second CAPC. Wherein, the second CAPC is the same as the first CAPC, or the second CAPC is determined based on the first CAPC; the second CAPC is used for the second terminal device for the first physical sidelink The feedback channel (physical sidelink feedback channel, PSFCH) performs LBT.
通过上述方法,第二终端设备可以基于第一终端设备指示的CAPC针对PSFCH进行LBT,可以使得PSFCH传输的CAPC可以灵活适配实际的业务通信需求,提升SL-U的通信质量。Through the above method, the second terminal device can perform LBT on the PSFCH based on the CAPC indicated by the first terminal device, so that the CAPC transmitted by the PSFCH can be flexibly adapted to actual service communication requirements and improve the communication quality of the SL-U.
在一个可能的设计中,所述第一终端设备可以通过如下方式确定所述第一CAPC:所述第一终端设备从网络设备接收第一下行控制信息(downlink control information,DCI),所述第一DCI用于调度SL资源,所述第一DCI指示所述第一CAPC。这样第一终端设备可以确定第一DCI指示的CAPC作为第一CAPC。In a possible design, the first terminal device may determine the first CAPC in the following manner: the first terminal device receives first downlink control information (DCI) from a network device, and the The first DCI is used for scheduling SL resources, and the first DCI indicates the first CAPC. In this way, the first terminal device can determine the CAPC indicated by the first DCI as the first CAPC.
在一个可能的设计中,所述第一终端设备可以通过如下方式确定所述第一CAPC:所述第一终端设备可以根据第一预设规则和第一传输块(transport block,TB)确定所述第一CAPC。这样第一终端设备可以基于实际情况来确定第一CAPC。In a possible design, the first terminal device may determine the first CAPC in the following manner: the first terminal device may determine the first CAPC according to a first preset rule and a first transport block (TB). Describe the first CAPC. In this way, the first terminal device can determine the first CAPC based on the actual situation.
在一个可能的设计中,所述第一终端设备根据所述第一预设规则和所述第一TB确定所述第一CAPC,方法可以为:当所述第一TB中包括至少一个媒体接入控制控制元素(media access control control element,MAC CE)时,所述第一终端设备可以确定所述第一CAPC为所述至少一个MAC CE对应的CAPC中优先级最高的CAPC;当所述第一TB中未包括所述至少一个MAC CE,且包括至少一个侧行链路控制信道业务数据单元(sidelink control channel service data unit,SCCH SDU)时,所述第一终端设备可以确定所述第一CAPC为所述至少一个SCCH SDU对应的CAPC中优先级最高的CAPC;当所述第一TB中未包括所述至少一个MAC CE和所述至少一个SCCH SDU,且包括至少一个侧行链路业务信道业务数据单元(sidelink traffic channel service data unit,STCH SDU)时,所述第一终端设备可以
确定所述第一CAPC为所述至少一个STCH SDU对应的CAPC中优先级最低的CAPC。基于上述方法,第一终端设备可以结合第一预设规则和第一TB确定准确的第一CAPC。In a possible design, the first terminal device determines the first CAPC according to the first preset rule and the first TB. The method may be: when the first TB includes at least one media interface When a media access control control element (MAC CE) is entered, the first terminal device may determine that the first CAPC is the CAPC with the highest priority among the CAPCs corresponding to the at least one MAC CE; when the first CAPC is When a TB does not include the at least one MAC CE and includes at least one sidelink control channel service data unit (SCCH SDU), the first terminal device may determine the first The CAPC is the CAPC with the highest priority among the CAPCs corresponding to the at least one SCCH SDU; when the first TB does not include the at least one MAC CE and the at least one SCCH SDU, and includes at least one sidelink service sidelink traffic channel service data unit (STCH SDU), the first terminal device may The first CAPC is determined to be the CAPC with the lowest priority among the CAPCs corresponding to the at least one STCH SDU. Based on the above method, the first terminal device can determine the accurate first CAPC in combination with the first preset rule and the first TB.
在一个可能的设计中,所述第一终端设备根据所述第一预设规则和所述第一TB确定所述第一CAPC,方法可以为:所述第一终端设备确定所述第一CAPC为所述第一TB中包含的至少一个逻辑信道(logical channel,LCH)和/或至少一个MAC CE对应的CAPC中优先级最高的CAPC。基于上述方法,第一终端设备可以结合第一预设规则和第一TB确定准确的第一CAPC,并且该方法实现复杂度较低。In a possible design, the first terminal device determines the first CAPC according to the first preset rule and the first TB. The method may be: the first terminal device determines the first CAPC. It is the CAPC with the highest priority among the CAPCs corresponding to at least one logical channel (LCH) and/or at least one MAC CE included in the first TB. Based on the above method, the first terminal device can determine the accurate first CAPC in combination with the first preset rule and the first TB, and the implementation complexity of this method is low.
在一个可能的设计中,所述第一终端设备可以通过如下方式确定所述第一CAPC:所述第一终端设备确定第一LCH或第一MAC CE对应的CAPC为所述第一CAPC,所述第一LCH或所述第一MAC CE用于触发所述第一终端设备选择或重选SL资源,所述第一LCH或所述第一MAC CE与所述CAPC存在对应关系。基于上述方法,第一终端设备可以结合触发SL资源选择或重选的逻辑信道或MAC CE确定准确的第一CAPC。In a possible design, the first terminal device may determine the first CAPC in the following manner: the first terminal device determines that the CAPC corresponding to the first LCH or the first MAC CE is the first CAPC, so The first LCH or the first MAC CE is used to trigger the first terminal device to select or reselect SL resources, and there is a corresponding relationship between the first LCH or the first MAC CE and the CAPC. Based on the above method, the first terminal device can determine the accurate first CAPC in combination with the logical channel or MAC CE that triggers SL resource selection or reselection.
在一个可能的设计中,所述第一信息可以包括第一指示信息,所述第一指示信息用于指示所述第二CAPC用于PSFCH传输。这样可以明确第二CAPC是用于PSFCH传输的,以使第二终端设备基于第二CAPC进行LBT。In a possible design, the first information may include first indication information, and the first indication information is used to instruct the second CAPC to be used for PSFCH transmission. In this way, it is clear that the second CAPC is used for PSFCH transmission, so that the second terminal device performs LBT based on the second CAPC.
在一个可能的设计中,所述第一信息的格式为第一格式,所述第一格式可以用于指示所述第二CAPC用于PSFCH传输。这样通过第一信息的格式指示第二CAPC是用于PSFCH传输的,可以节省指示开销。In a possible design, the format of the first information is a first format, and the first format may be used to indicate that the second CAPC is used for PSFCH transmission. In this way, the format of the first information indicates that the second CAPC is used for PSFCH transmission, which can save indication overhead.
第二方面,本申请提供了一种通信方法,该方法可以应用于第二终端设备、第二终端设备中的一个功能模块、第二终端设备中的处理器或芯片等。以应用于第二终端设备为例,该方法可以包括:第二终端设备从第一终端设备接收第一信息,所述第一信息用于指示第二CAPC;后续,所述第二终端设备可以根据所述第二CAPC针对第一PSFCH进行LBT。In a second aspect, this application provides a communication method, which can be applied to a second terminal device, a functional module in the second terminal device, a processor or chip in the second terminal device, etc. Taking application to the second terminal device as an example, the method may include: the second terminal device receives first information from the first terminal device, the first information being used to indicate the second CAPC; subsequently, the second terminal device may LBT is performed on the first PSFCH according to the second CAPC.
通过上述方法,第二终端设备可以基于第一终端设备指示的CAPC针对PSFCH进行LBT,可以使得PSFCH传输的CAPC可以灵活适配实际的业务通信需求,提升SL-U的通信质量。Through the above method, the second terminal device can perform LBT on the PSFCH based on the CAPC indicated by the first terminal device, so that the CAPC transmitted by the PSFCH can be flexibly adapted to actual service communication requirements and improve the communication quality of the SL-U.
在一个可能的设计中,所述第一信息可以包括第一指示信息,所述第一指示信息用于指示所述第二CAPC用于PSFCH传输。这样可以明确第二CAPC是用于PSFCH传输的,以使第二终端设备基于第二CAPC进行LBT。In a possible design, the first information may include first indication information, and the first indication information is used to instruct the second CAPC to be used for PSFCH transmission. In this way, it is clear that the second CAPC is used for PSFCH transmission, so that the second terminal device performs LBT based on the second CAPC.
在一个可能的设计中,所述第一信息的格式为第一格式,所述第一格式可以用于指示所述第二CAPC用于PSFCH传输。这样通过第一信息的格式指示第二CAPC是用于PSFCH传输的,可以节省指示开销。In a possible design, the format of the first information is a first format, and the first format may be used to indicate that the second CAPC is used for PSFCH transmission. In this way, the format of the first information indicates that the second CAPC is used for PSFCH transmission, which can save indication overhead.
在一个可能的设计中,所述第一PSFCH基于物理侧行共享信道(physical sidelink control channel,PSSCH)与PSFCH的映射关系确定,或者,所述第一PSFCH为所述第一终端设备指示的。这样当第一PSFCH是基于映射关系或第一终端设备指示确定时,也即是PSFCH的确定和实际的业务通信相关时,第二终端设备可以基于第一终端设备指示的CAPC针对PSFCH进行LBT,可以使得PSFCH传输的CAPC可以灵活适配实际的业务通信需求,提升SL-U的通信质量。In a possible design, the first PSFCH is determined based on the mapping relationship between a physical sidelink control channel (PSSCH) and the PSFCH, or the first PSFCH is indicated by the first terminal device. In this way, when the first PSFCH is determined based on the mapping relationship or the first terminal equipment indication, that is, when the determination of the PSFCH is related to the actual service communication, the second terminal equipment can perform LBT on the PSFCH based on the CAPC indicated by the first terminal equipment. This enables the CAPC transmitted by PSFCH to flexibly adapt to actual business communication needs and improve the communication quality of SL-U.
在一个可能的设计中,所述第二终端设备根据所述第二CAPC针对第一PSFCH进行LBT,方法可以为:所述第二终端设备根据所述第二CAPC确定第三CAPC,进而所述第二终端设备根据所述第三CAPC针对所述第一PSFCH进行LBT。这样第二终端设备可以灵活确定所需的CAPC来针对第一PSFCH进行LBT,以灵活适配实际的业务通信需求,提升SL-U的通信质量。In a possible design, the second terminal device performs LBT for the first PSFCH according to the second CAPC. The method may be: the second terminal device determines the third CAPC according to the second CAPC, and then the The second terminal equipment performs LBT on the first PSFCH according to the third CAPC. In this way, the second terminal device can flexibly determine the required CAPC to perform LBT on the first PSFCH to flexibly adapt to actual business communication requirements and improve the communication quality of SL-U.
在一个可能的设计中,所述第二终端设备根据所述第二CAPC确定所述第三CAPC,方法可以为:所述第二终端设备确定所述第二CAPC小于或者等于第一阈值时,所述第二终端设备确定所述第三CAPC;或者,所述第二终端设备确定所述第二CAPC大于所述第一阈值时,所述第二终端设备确定所述第三CAPC。这样第二终端设备可以灵活确定所需的CAPC来针对第一PSFCH进行LBT,以灵活适配实际的业务通信需求,提升SL-U的通信质量。In a possible design, the second terminal device determines the third CAPC based on the second CAPC. The method may be: when the second terminal device determines that the second CAPC is less than or equal to the first threshold, The second terminal device determines the third CAPC; or, when the second terminal device determines that the second CAPC is greater than the first threshold, the second terminal device determines the third CAPC. In this way, the second terminal device can flexibly determine the required CAPC to perform LBT on the first PSFCH to flexibly adapt to actual business communication requirements and improve the communication quality of SL-U.
在一个可能的设计中,所述第二终端设备可以根据所述第二CAPC确定第四CAPC,进而所述第二终端设备根据所述第四CAPC针对第二PSFCH进行LBT。这样,第二终端设备针对一个PSSCH对应的多个PSFCH进行LBT时,可以使用不同的CAPC,提升PSFCH传输的可靠性,从而提高整体的SL-U的通信质量。
In a possible design, the second terminal device may determine a fourth CAPC based on the second CAPC, and then the second terminal device performs LBT for the second PSFCH based on the fourth CAPC. In this way, when the second terminal device performs LBT on multiple PSFCHs corresponding to one PSSCH, it can use different CAPCs to improve the reliability of PSFCH transmission, thereby improving the overall SL-U communication quality.
在一个可能的设计中,所述第二终端设备根据所述第二CAPC确定第四CAPC,方法可以为:所述第二终端设备可以将所述第二CAPC减去M,得到所述第四CAPC,所述M为大于或者等于1的整数。这样,第二终端设备针对一个PSSCH对应的多个PSFCH进行LBT时,可以使用不同的CAPC,以使得后续PSFCH执行LBT使用更高优先级的CAPC,提升PSFCH传输的可靠性,从而提高整体的SL-U的通信质量。In a possible design, the second terminal device determines the fourth CAPC based on the second CAPC. The method may be: the second terminal device may subtract M from the second CAPC to obtain the fourth CAPC. CAPC, the M is an integer greater than or equal to 1. In this way, when the second terminal device performs LBT on multiple PSFCHs corresponding to one PSSCH, different CAPCs can be used, so that subsequent PSFCH executions of LBT use higher priority CAPCs, thereby improving the reliability of PSFCH transmission and thus improving the overall SL. -U communication quality.
在一个可能的设计中,所述第二终端设备接收到第二信息,所述第二信息可以用于指示基于所述第二CAPC确定所述第四CAPC,并根据所述第四CAPC针对所述第二PSFCH进行LBT。这样第二终端设备可以基于指示来确定针对不同的PSFCH是否使用不同的CAPC,以使在可以使用相同的CAPC时,节省每次PSFCH传输确定新的CAPC的功耗。In a possible design, the second terminal device receives second information, and the second information may be used to indicate that the fourth CAPC is determined based on the second CAPC, and the fourth CAPC is determined based on the fourth CAPC. The second PSFCH performs LBT. In this way, the second terminal device can determine whether to use different CAPCs for different PSFCHs based on the indication, so that when the same CAPC can be used, the power consumption of determining a new CAPC for each PSFCH transmission is saved.
第三方面,本申请提供了一种通信方法,该方法可以应用于第二终端设备、第二终端设备中的一个功能模块、第二终端设备中的处理器或芯片等。以应用于第二终端设备为例,该方法可以包括:第二终端设备从第一终端设备接收侧行链路控制信息(sidelink control information,SCI),进而所述第二终端设备确定所述SCI未指示CAPC时,根据预定义的CAPC针对第一PSFCH进行LBT。In a third aspect, this application provides a communication method, which can be applied to a second terminal device, a functional module in the second terminal device, a processor or chip in the second terminal device, etc. Taking application to the second terminal device as an example, the method may include: the second terminal device receives sidelink control information (SCI) from the first terminal device, and then the second terminal device determines the SCI When CAPC is not indicated, LBT is performed on the first PSFCH according to the predefined CAPC.
通过上述方法,第二终端设备基于预定义的CAPC针对PSFCH进行LBT,可以使得PSFCH传输的CAPC在某些情况下可以不用适配实际的业务通信需求,而使用较高优先级的CAPC进行PSFCH传输,进而提升SL-U的通信质量。Through the above method, the second terminal device performs LBT for PSFCH based on the predefined CAPC, so that the CAPC for PSFCH transmission does not need to adapt to actual business communication requirements in some cases, and a higher priority CAPC is used for PSFCH transmission. , thereby improving the communication quality of SL-U.
在一个可能的设计中,所述第一PSFCH可以为所述第二终端设备确定的。这样,当第一PSFCH是所述第二终端设备确定时,也即PSFCH的确定和实际的业务通信不直接相关时,第二终端设备基于预定义的CAPC针对PSFCH进行LBT,可以使得PSFCH传输的CAPC在某些情况下可以不用适配实际的业务通信需求,而使用较高优先级的CAPC进行PSFCH传输,进而提升SL-U的通信质量。In a possible design, the first PSFCH may be determined by the second terminal equipment. In this way, when the first PSFCH is determined by the second terminal device, that is, when the determination of the PSFCH is not directly related to the actual service communication, the second terminal device performs LBT on the PSFCH based on the predefined CAPC, which can make the PSFCH transmission In some cases, CAPC does not need to adapt to actual business communication requirements, but uses higher priority CAPC for PSFCH transmission, thereby improving the communication quality of SL-U.
在一个可能的设计中,所述第二终端设备根据所述预定义的CAPC确定第五CAPC,进而,所述第二终端设备可以根据所述第五CAPC针对第二PSFCH进行LBT。这样,第二终端设备针对多个PSFCH进行LBT时,可以使用不同的CAPC,提升PSFCH传输的可靠性,从而提高整体的SL-U的通信质量。In a possible design, the second terminal equipment determines a fifth CAPC based on the predefined CAPC, and further, the second terminal equipment can perform LBT for the second PSFCH based on the fifth CAPC. In this way, when the second terminal device performs LBT for multiple PSFCHs, it can use different CAPCs to improve the reliability of PSFCH transmission, thereby improving the overall SL-U communication quality.
在一个可能的设计中,所述第二终端设备根据所述预定义的CAPC确定第五CAPC,方法可以为:所述第二终端设备可以将所述预定义的CAPC减去S,得到所述第五CAPC,所述S为大于或者等于1的整数。这样,第二终端设备针对多个PSFCH进行LBT时,可以使用不同的CAPC,以使得后续PSFCH执行LBT使用更高优先级的CAPC,提升PSFCH传输的可靠性,从而提高整体的SL-U的通信质量。In a possible design, the second terminal device determines the fifth CAPC based on the predefined CAPC. The method may be: the second terminal device may subtract S from the predefined CAPC to obtain the In the fifth CAPC, the S is an integer greater than or equal to 1. In this way, when the second terminal device performs LBT for multiple PSFCHs, it can use different CAPCs, so that subsequent PSFCH executions of LBT use higher priority CAPCs, improving the reliability of PSFCH transmission, thereby improving the overall SL-U communication. quality.
在一个可能的设计中,所述第二终端设备接收到第三信息,所述第三信息用于指示基于所述预定义的CAPC确定所述第五CAPC,并根据所述第五CAPC针对所述第二PSFCH进行LBT。这样第二终端设备可以基于指示来确定针对不同的PSFCH是否使用不同的CAPC,以使在可以使用相同的CAPC时,节省每次PSFCH传输确定新的CAPC的功耗。In a possible design, the second terminal device receives third information, the third information is used to indicate that the fifth CAPC is determined based on the predefined CAPC, and the fifth CAPC is determined based on the fifth CAPC. The second PSFCH performs LBT. In this way, the second terminal device can determine whether to use different CAPCs for different PSFCHs based on the indication, so that when the same CAPC can be used, the power consumption of determining a new CAPC for each PSFCH transmission is saved.
第四方面,本申请还提供了一种通信装置,所述通信装置可以是第一终端设备,第一终端设备中的处理器、芯片或一个功能模块等,该通信装置具有实现上述第一方面或第一方面的各个可能的设计示例中第一终端设备的功能。所述功能可以通过硬件实现,也可以通过硬件执行相应的软件实现。所述硬件或软件包括一个或多个与上述功能相对应的模块。In a fourth aspect, the present application also provides a communication device. The communication device may be a first terminal device, a processor, a chip or a functional module in the first terminal device. The communication device has the ability to implement the above-mentioned first aspect. Or the functions of the first terminal device in each possible design example of the first aspect. The functions described can be implemented by hardware, or can be implemented by hardware executing corresponding software. The hardware or software includes one or more modules corresponding to the above functions.
在一个可能的设计中,所述通信装置的结构中包括收发单元和处理单元,这些单元可以执行上述第一方面或第一方面的各个可能的设计示例中第一终端设备的相应功能,具体参见方法示例中的详细描述,此处不做赘述。In one possible design, the structure of the communication device includes a transceiver unit and a processing unit. These units can perform the corresponding functions of the first terminal device in the above-mentioned first aspect or each possible design example of the first aspect. For details, see The detailed description in the method example will not be repeated here.
在一个可能的设计中,所述通信装置的结构中包括收发器和处理器,可选地还包括存储器,所述收发器用于收发信息或数据,以及用于与通信系统中的其他设备进行通信交互,所述处理器被配置为支持所述通信装置执行上述第一方面或第一方面的各个可能的设计示例中第一终端设备的相应的功能。所述存储器与所述处理器耦合,其保存所述通信装置必要的程序指令和数据。In a possible design, the structure of the communication device includes a transceiver and a processor, and optionally a memory. The transceiver is used to send and receive information or data, and to communicate with other devices in the communication system. Interactively, the processor is configured to support the communication device to perform the corresponding function of the first terminal device in the above-mentioned first aspect or each possible design example of the first aspect. The memory is coupled to the processor and holds program instructions and data necessary for the communications device.
第五方面,本申请还提供了一种通信装置,所述通信装置可以是第二终端设备,第二终端设备中的处理器、芯片或一个功能模块等,该通信装置具有实现上述第二方面或第二方面的各个可能的设计示例中第二终端设备的功能。所述功能可以通过硬件实现,也可以通过硬件执行相应的软件实现。所述硬件或软件包括一个或多个与上述功能相对应的模块。In a fifth aspect, this application also provides a communication device. The communication device may be a second terminal device, a processor, a chip or a functional module in the second terminal device. The communication device has the ability to implement the above second aspect. or the functionality of the second terminal device in each possible design example of the second aspect. The functions described can be implemented by hardware, or can be implemented by hardware executing corresponding software. The hardware or software includes one or more modules corresponding to the above functions.
在一个可能的设计中,所述通信装置的结构中包括收发单元和处理单元,这些单元可以执行上述第二方面或第二方面的各个可能的设计示例中第二终端设备的相应功能,具体参见方法示例中的详细描述,
此处不做赘述。In one possible design, the structure of the communication device includes a transceiver unit and a processing unit. These units can perform the corresponding functions of the second terminal device in the above second aspect or each possible design example of the second aspect. For details, see Detailed description in method example, No further details will be given here.
在一个可能的设计中,所述通信装置的结构中包括收发器和处理器,可选地还包括存储器,所述收发器用于收发信息或数据,以及用于与通信系统中的其他设备进行通信交互,所述处理器被配置为支持所述通信装置执行上述第二方面或第二方面的各个可能的设计示例中第二终端设备的相应的功能。所述存储器与所述处理器耦合,其保存所述通信装置必要的程序指令和数据。In a possible design, the structure of the communication device includes a transceiver and a processor, and optionally a memory. The transceiver is used to send and receive information or data, and to communicate with other devices in the communication system. Interactively, the processor is configured to support the communication device to perform the corresponding function of the second terminal device in the above second aspect or each possible design example of the second aspect. The memory is coupled to the processor and holds program instructions and data necessary for the communications device.
第六方面,本申请还提供了一种通信装置,所述通信装置可以是第二终端设备,第二终端设备中的处理器、芯片或一个功能模块等,该通信装置具有实现上述第三方面或第三方面的各个可能的设计示例中第二终端设备的功能。所述功能可以通过硬件实现,也可以通过硬件执行相应的软件实现。所述硬件或软件包括一个或多个与上述功能相对应的模块。In a sixth aspect, the present application also provides a communication device. The communication device may be a second terminal device, a processor, a chip or a functional module in the second terminal device. The communication device has the ability to implement the above third aspect. or the functionality of the second terminal device in each possible design example of the third aspect. The functions described can be implemented by hardware, or can be implemented by hardware executing corresponding software. The hardware or software includes one or more modules corresponding to the above functions.
在一个可能的设计中,所述通信装置的结构中包括收发单元和处理单元,这些单元可以执行上述第三方面或第三方面的各个可能的设计示例中第二终端设备的相应功能,具体参见方法示例中的详细描述,此处不做赘述。In one possible design, the structure of the communication device includes a transceiver unit and a processing unit. These units can perform the corresponding functions of the second terminal device in the above third aspect or each possible design example of the third aspect. For details, see The detailed description in the method example will not be repeated here.
在一个可能的设计中,所述通信装置的结构中包括收发器和处理器,可选地还包括存储器,所述收发器用于收发信息或数据,以及用于与通信系统中的其他设备进行通信交互,所述处理器被配置为支持所述通信装置执行上述第三方面或第三方面的各个可能的设计示例中第二终端设备的相应的功能。所述存储器与所述处理器耦合,其保存所述通信装置必要的程序指令和数据。In a possible design, the structure of the communication device includes a transceiver and a processor, and optionally a memory. The transceiver is used to send and receive information or data, and to communicate with other devices in the communication system. Interactively, the processor is configured to support the communication device to perform the corresponding function of the second terminal device in the above third aspect or each possible design example of the third aspect. The memory is coupled to the processor and holds program instructions and data necessary for the communications device.
第七方面,本申请实施例提供了一种通信系统,可以包括上述第一方面及第一方面的各个可能的设计中的第一终端设备和第二方面及第二方面的各个可能的设计中的第二终端设备等;或者可以包括上述第三方面及第三方面的各个可能的设计中的第一终端设备和第二终端设备等。In a seventh aspect, embodiments of the present application provide a communication system, which may include the first terminal device in the first aspect and each possible design of the first aspect and the second aspect and each possible design of the second aspect. second terminal equipment, etc.; or may include the first terminal equipment, the second terminal equipment, etc. in the above-mentioned third aspect and each possible design of the third aspect.
第八方面,本申请实施例提供的一种计算机可读存储介质,该计算机可读存储介质存储有程序指令,当程序指令在计算机上运行时,使得计算机执行本申请实施例第一方面及其任一可能的设计中,或第二方面及其任一可能的设计中,或第三方面及其任一可能的设计中所述的方法。示例性的,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。以此为例但不限于:计算机可读介质可以包括非瞬态计算机可读介质、随机存取存储器(random-access memory,RAM)、只读存储器(read-only memory,ROM)、电可擦除可编程只读存储器(electrically EPROM,EEPROM)、CD-ROM或其他光盘存储、磁盘存储介质或者其他磁存储设备、或者能够用于携带或存储具有指令或数据结构形式的期望的程序代码并能够由计算机存取的任何其他介质。In an eighth aspect, embodiments of the present application provide a computer-readable storage medium. The computer-readable storage medium stores program instructions. When the program instructions are run on a computer, they cause the computer to execute the first aspect of the embodiments of the application and its operations. any possible design, or the second aspect and any possible design thereof, or the method described in the third aspect and any possible design thereof. By way of example, computer-readable storage media can be any available media that can be accessed by a computer. Taking this as an example but not limited to: computer-readable media may include non-transitory computer-readable media, random-access memory (random-access memory, RAM), read-only memory (read-only memory, ROM), electrically erasable memory In addition to programmable read-only memory (electrically EPROM, EEPROM), CD-ROM or other optical disk storage, magnetic disk storage media or other magnetic storage devices, or can be used to carry or store the desired program code in the form of instructions or data structures and can Any other media accessed by a computer.
第九方面,本申请实施例提供一种计算机程序产品,包括计算机程序代码或指令的,当计算机程序代码或指令在计算机上运行时,使得上述第一方面或第一方面任一种可能的设计中,或者上述第二方面或第二方面任一种可能的设计中,或者上述第三方面或第三方面任一种可能的设计中所述的方法被执行。In a ninth aspect, embodiments of the present application provide a computer program product that includes computer program code or instructions. When the computer program code or instructions are run on a computer, the first aspect or any of the possible designs of the first aspect are enabled. , or the method described in the above-mentioned second aspect or any possible design of the second aspect, or the above-mentioned third aspect or any possible design of the third aspect is executed.
第十方面,本申请还提供了一种芯片,包括处理器,所述处理器与存储器耦合,用于读取并执行所述存储器中存储的程序指令,以使所述芯片实现上述第一方面或第一方面任一种可能的设计中,或者上述第二方面或第二方面任一种可能的设计中,或者上述第三方面或第三方面任一种可能的设计中所述的方法。In a tenth aspect, the present application also provides a chip, including a processor, the processor being coupled to a memory and configured to read and execute program instructions stored in the memory, so that the chip implements the above first aspect Or in any possible design of the first aspect, or in the above second aspect or any possible design of the second aspect, or in the above third aspect or any possible design of the third aspect, the method described.
上述第四方面至第十方面中的各个方面以及各个方面可能达到的技术效果请参照上述针对第一方面或第一方面中的各种可能方案,或者上述第二方面或第二方面中的各种可能方案,或第三方面及第三方面中的各种可能方案可以达到的技术效果说明,这里不再重复赘述。For each aspect in the above fourth to tenth aspects and the technical effects that may be achieved by each aspect, please refer to the above for the first aspect or various possible solutions in the first aspect, or the above second aspect or each of the second aspects. possible solutions, or descriptions of the third aspect and the technical effects that can be achieved by various possible solutions in the third aspect, will not be repeated here.
图1为本申请提供的一种通信系统的架构示意图;Figure 1 is a schematic diagram of the architecture of a communication system provided by this application;
图2为本申请提供的另一种通信系统的架构示意图;Figure 2 is an architectural schematic diagram of another communication system provided by this application;
图3为本申请提供的又一种通信系统的架构示意图;Figure 3 is an architectural schematic diagram of another communication system provided by this application;
图4为本申请提供的一种通信方法的流程图;Figure 4 is a flow chart of a communication method provided by this application;
图5为本申请提供的另一种通信方法的流程图;Figure 5 is a flow chart of another communication method provided by this application;
图6为本申请提供的一种通信装置的结构示意图;Figure 6 is a schematic structural diagram of a communication device provided by this application;
图7为本申请提供的一种通信装置的结构图。
Figure 7 is a structural diagram of a communication device provided by this application.
下面将结合附图对本申请作进一步地详细描述。The present application will be described in further detail below with reference to the accompanying drawings.
本申请实施例提供一种通信方法及装置,用以明确SL-U场景下,终端设备如何进行LBT,提升SL-U的通信质量。其中,本申请所述方法和装置基于同一技术构思,由于方法及装置解决问题的原理相似,因此装置与方法的实施可以相互参见,重复之处不再赘述。Embodiments of this application provide a communication method and device to clarify how a terminal device performs LBT in an SL-U scenario and improve the communication quality of SL-U. Among them, the method and the device described in this application are based on the same technical concept. Since the principles of solving problems by the method and the device are similar, the implementation of the device and the method can be referred to each other, and the repeated parts will not be repeated.
为便于理解,以下先对本申请实施例涉及的部分用语进行解释说明。To facilitate understanding, some terms involved in the embodiments of this application are first explained below.
1)SL通信1)SL communication
在无线通信系统中,终端设备与终端设备之间可以通过网络设备进行数据通信,也可以不借助网络设备,直接进行终端设备与终端设备之间的通信。终端设备和终端设备进行直接通信即为SL通信。In a wireless communication system, data communication between terminal devices can be carried out through network equipment, or communication between terminal equipment can be carried out directly without the help of network equipment. Direct communication between terminal equipment and terminal equipment is SL communication.
SL通信中,终端设备与终端设备之间的接口称为基于临近的服务通信5((proximity-based services,ProSe)communication 5,PC5)接口,终端设备与终端设备之间的链路称为SL。In SL communication, the interface between terminal equipment and terminal equipment is called proximity-based services communication 5 (PC5) interface, and the link between terminal equipment and terminal equipment is called SL. .
SL通信的一个应用场景为车与任何事物通信(vehicle-to-everything,V2X)的车联网场景。在车联网中,每个车即一个终端设备,终端设备与终端设备之间可以通过SL直接进行数据传输,而不需要经过网络,这样可以有效地减少通信时延。One application scenario of SL communication is the vehicle-to-everything (V2X) Internet of Vehicles scenario. In the Internet of Vehicles, each car is a terminal device, and data can be transmitted directly between terminal devices through SL without going through the network, which can effectively reduce communication delays.
SL通信支持单播、组播、广播。SL communication supports unicast, multicast, and broadcast.
2)终端设备获取SL资源的方式2) How the terminal device obtains SL resources
终端设备获取SL资源的方式有两种,分别称为方式1(mode1)和方式2(mode2)。There are two ways for terminal devices to obtain SL resources, which are called mode 1 (mode1) and mode 2 (mode2).
mode1:终端设备从网络设备获取SL资源,其中,网络设备可以通过下行控制信息(downlink control information,DCI)给终端设备调度SL资源,或者,网络设备通过无线资源控制(radio resource control,RRC)消息给终端设备配置SL配置授权(configured grant)。Mode1: The terminal device obtains SL resources from the network device. The network device can schedule SL resources to the terminal device through downlink control information (DCI), or the network device can use radio resource control (RRC) messages. Configure the SL configuration grant (configured grant) for the terminal device.
mode2:终端设备可以从网络设备接收SL资源池配置,或者,终端设备可以从预配置中获取SL资源池配置,然后终端设备在SL资源池中选择SL资源。其中,终端设备选择SL资源可以是随机选择的,或者基于监听(sensing)或者不完全监听(partial sensing)的结果进行选择的。Mode2: The terminal device can receive the SL resource pool configuration from the network device, or the terminal device can obtain the SL resource pool configuration from the preconfiguration, and then the terminal device selects the SL resource in the SL resource pool. Among them, the terminal device may select SL resources randomly, or based on the results of sensing or partial sensing.
3)非授权频谱(unlicensed spectrum)3) Unlicensed spectrum
为了充分、合理、有效地利用无线电频谱资源,保证无线电业务的正常运行,防止各种无线电业务、无线电台站和系统之间的相互干扰,对频段进行了划分。2/3/4G等技术使用是授权频谱,需要由电信运营商申请才能使用,干扰小,安全。In order to fully, reasonably and effectively utilize radio spectrum resources, ensure the normal operation of radio services, and prevent mutual interference between various radio services, radio stations and systems, frequency bands are divided. Technologies such as 2/3/4G use licensed spectrum and need to be applied for by telecom operators before they can be used. They have low interference and are safe.
WiFi、蓝牙、无线个域网(Zigbee)等技术使用的是非授权频谱,目的是作为运营商增强其服务提供的补充工具,为共享频谱,无需申请就能使用授权频谱通信,并且免费。在非授权频谱上,通信需要遵守某些规定,例如先听后说(listen-before-Talk,LBT)和占用先到带宽(occupied channel bandwidth,OCB)需求,用于保证在该频谱上运行的各类终端设备之间的接入公平性。在非授权频谱上的SL通信称为SL-U。Technologies such as WiFi, Bluetooth, and Wireless Personal Area Network (Zigbee) use unlicensed spectrum. They are intended to serve as supplementary tools for operators to enhance their service offerings. In order to share spectrum, licensed spectrum communications can be used without application and are free of charge. On unlicensed spectrum, communications need to comply with certain regulations, such as listen-before-talk (LBT) and occupied channel bandwidth (OCB) requirements, which are used to ensure that devices operating on this spectrum Access fairness among various types of terminal devices. SL communication on unlicensed spectrum is called SL-U.
4)LBT4)LBT
LBT也可以称为信道接入过程。通常LBT是以信道(例如20兆赫兹(MHz))的粒度进行的。通信设备在某个信道(例如记作第一信道)上发送信号(例如,数据信号)之前,可以先检测该第一信道是否空闲,例如,是否检测到附近的通信设备正在占用该第一信道发送信号,这一检测过程可以称为空闲信道评估(clear channel assessment,CCA)或者称为信道接入过程。LBT can also be called the channel access process. Typically LBT is performed at channel (eg, 20 megahertz (MHz)) granularity. Before a communication device sends a signal (for example, a data signal) on a certain channel (for example, a first channel), it may first detect whether the first channel is idle, for example, whether it detects that a nearby communication device is occupying the first channel. To send a signal, this detection process can be called clear channel assessment (CCA) or channel access process.
LBT分为两种类型分别为类型1(type1)和类型2(type2),类型1的LBT即为基于固定时长的信道接入过程(也可以称为第一类型的信道接入过程),类型2的LBT即为基于回退的信道接入过程(也可以称为第二类型的信道接入过程)。LBT is divided into two types: type 1 (type 1) and type 2 (type 2). Type 1 LBT is a channel access process based on a fixed duration (it can also be called the first type of channel access process). The LBT of 2 is the backoff-based channel access process (which can also be called the second type of channel access process).
5)信道接入优先级类型(channel access priority class,CAPC)5) Channel access priority class (CAPC)
终端设备在进行type1(固定时长的能量检测)的LBT时(也就是第一类型的信道接入过程),需要根据CAPC来确定信道占用时间(channel occupancy time,COT)。CAPC与COT的关系可以如下述表1所示,表1中第一列表示CAPC值,该CAPC值越小,该CAPC对应的优先级越高;表1中第五列表示不同CAPC值对应的COT大小(单位为毫秒ms)。可理解,表1中其它列的含义可以参考现有标准,这里不再一一详述。
When the terminal device performs LBT of type 1 (fixed-duration energy detection) (that is, the first type of channel access process), it needs to determine the channel occupancy time (COT) based on CAPC. The relationship between CAPC and COT can be shown in Table 1 below. The first column in Table 1 represents the CAPC value. The smaller the CAPC value, the higher the priority corresponding to the CAPC. The fifth column in Table 1 represents the corresponding priority of different CAPC values. COT size (unit: ms). It is understandable that the meanings of other columns in Table 1 can refer to existing standards and will not be described in detail here.
表1
Table 1
Table 1
6)终端设备,例如可以是终端设备本身,或者是用于实现终端设备的功能的模块,例如芯片或芯片系统,该芯片或芯片系统可以设置在终端设备中。终端设备,又可以称之为用户设备(user equipment,UE)、移动台(mobile station,MS)、移动终端(mobile terminal,MT)等,是一种向用户提供语音和/或数据连通性的设备。例如,终端设备可以包括具有无线连接功能的手持式设备、车载设备等。目前,终端设备可以是:手机(mobile phone)、平板电脑、笔记本电脑、掌上电脑、移动互联网设备(mobile internet device,MID)、可穿戴设备,虚拟现实(virtual reality,VR)设备、增强现实(augmented reality,AR)设备、XR设备、MR设备、工业控制(industrial control)中的无线终端、无人驾驶(self-driving)中的无线终端、远程手术(remote medical surgery)中的无线终端、智能电网(smart grid)中的无线终端、运输安全(transportation safety)中的无线终端、智慧城市(smart city)中的无线终端,或智慧家庭(smart home)中的无线终端等。6) The terminal device may be, for example, the terminal device itself, or a module used to implement the functions of the terminal device, such as a chip or a chip system, and the chip or chip system may be provided in the terminal device. Terminal equipment, also known as user equipment (UE), mobile station (MS), mobile terminal (MT), etc., is a device that provides voice and/or data connectivity to users. equipment. For example, the terminal device may include a handheld device with a wireless connection function, a vehicle-mounted device, etc. Currently, terminal devices can be: mobile phones, tablets, laptops, PDAs, mobile Internet devices (MID), wearable devices, virtual reality (VR) devices, augmented reality ( augmented reality (AR) equipment, XR equipment, MR equipment, wireless terminals in industrial control, wireless terminals in self-driving, wireless terminals in remote medical surgery, intelligent Wireless terminals in the power grid (smart grid), wireless terminals in transportation safety (transportation safety), wireless terminals in smart cities (smart city), or wireless terminals in smart homes (smart home), etc.
终端设备还可以是设备到设备通信(device-to-device,D2D)终端设备、车联网V2X通信终端设备、智能车辆、车机系统(或称车联网系统)(telematics box,TBOX)、机器到机器/机器类通信(machine-to-machine/machine-type communications,M2M/MTC)终端设备、物联网(internet of things,IoT)终端设备。例如,终端设备可以为车辆、船舶或飞行器等载具或终端型路边单元,或内置于车辆或路边单元的通信模块或芯片。例如终端设备可以是车载模组。终端设备也可以为路侧单元(road side unit,RSU)。而如上介绍的各种终端设备,如果位于车辆上,例如放置在车辆内或安装在车辆内,都可以认为是车载终端设备,车载终端设备例如也称为车载单元(on board unit,OBU)。Terminal equipment can also be device-to-device communication (device-to-device, D2D) terminal equipment, Internet of Vehicles V2X communication terminal equipment, smart vehicles, vehicle-to-machine systems (or Internet of Vehicles systems) (telematics box, TBOX), machine to Machine-to-machine/machine-type communications (M2M/MTC) terminal equipment, Internet of things (IoT) terminal equipment. For example, the terminal device may be a vehicle, ship or aircraft, or a terminal-type roadside unit, or a communication module or chip built into the vehicle or roadside unit. For example, the terminal device can be a vehicle-mounted module. The terminal equipment can also be a road side unit (RSU). If the various terminal devices introduced above are located on the vehicle, such as placed or installed in the vehicle, they can be considered as vehicle-mounted terminal equipment. The vehicle-mounted terminal equipment is also called an on-board unit (OBU), for example.
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或智能穿戴式设备等,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、智能头盔、智能首饰等。As an example and not a limitation, in this embodiment of the present application, the terminal device may also be a wearable device. Wearable devices can also be called wearable smart devices or smart wearable devices. It 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. wait. 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. Broadly defined 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. Used, such as various smart bracelets, smart helmets, smart jewelry, etc. for physical sign monitoring.
终端设备还可以为游乐设备、智能电器等智能设备或无人机等。Terminal devices can also be smart devices such as amusement equipment, smart appliances, or drones.
在本申请实施例的描述中,以终端设备为例进行说明。In the description of the embodiments of this application, a terminal device is taken as an example for explanation.
7)网络设备,为终端设备提供接入的设备。网络设备可以包括无线接入网(radio access network,RAN)设备,例如基站。网络设备也可以是指在空口与终端设备通信的设备。网络设备可以包括LTE系统或高级长期演进(long term evolution-advanced,LTE-A)中的演进型基站(evolved Node B ),可简称为eNB或e-NodeB)。eNB是一种部署在无线接入网中满足第四代移动通信技术(the fourth generation,4G)标准的为终端设备提供无线通信功能的装置。网络设备还可以是新无线控制器(new radio controller,NR controller),可以是5G系统中的(gNode B,gNB),可以是集中式网元(centralized unit),可以是新无线基站,可以是射频拉远模块,可以是微基站(也称为小站),可以是中继(relay),可以是分布式网元(distributed unit),可以是各种形式的宏基站,可以是传输接收点(transmission reception point,TRP)、传输测量功能(transmission measurement function,TMF)或传输点(transmission point,TP)或者任何其它无线接入设备,本申请实施例不限于此。网络设备也可以包括无线网络控制器(radio network controller,RNC)、节点B(Node B,NB)、基站控制器(base station controller,BSC)、基站
收发台(base transceiver station,BTS)、家庭基站(例如,home evolved NodeB,或home Node B,HNB)、基带单元(base band unit,BBU)或射频拉远单元(remote radio unit,RRU),或无线保真(wireless fidelity,Wifi)接入点(access point,AP),或者在云无线接入网(cloud radio access netowrk,CRAN)中的基带池(BBU pool)和RRU等。本申请的实施例对网络设备所使用的具体技术和具体设备形态不做限定。例如,网络设备在4G系统中可以对应eNB,在5G系统中对应gNB。7) Network equipment, equipment that provides access to terminal equipment. Network devices may include radio access network (RAN) devices, such as base stations. Network equipment may also refer to equipment that communicates with terminal equipment over the air interface. The network equipment may include an evolved base station (evolved Node B, which may be referred to as eNB or e-NodeB) in the LTE system or long term evolution-advanced (LTE-A). eNB is a device deployed in a wireless access network that meets the fourth generation (the fourth generation, 4G) standards of mobile communication technology to provide wireless communication functions for terminal equipment. The network device can also be a new radio controller (NR controller), it can be a (gNode B, gNB) in the 5G system, it can be a centralized network element (centralized unit), it can be a new wireless base station, it can be The radio frequency remote module can be a micro base station (also called a small station), a relay, a distributed unit, various forms of macro base stations, or a transmission and reception point. (transmission reception point, TRP), transmission measurement function (TMF), transmission point (transmission point, TP) or any other wireless access equipment, the embodiments of the present application are not limited thereto. Network devices may also include radio network controller (RNC), Node B (Node B, NB), base station controller (BSC), base station Transceiver station (base transceiver station, BTS), home base station (for example, home evolved NodeB, or home Node B, HNB), base band unit (base band unit, BBU) or remote radio unit (RRU), or Wireless fidelity (Wifi) access point (AP), or baseband pool (BBU pool) and RRU in cloud radio access network (cloud radio access netowrk, CRAN), etc. The embodiments of this application do not limit the specific technologies and specific equipment forms used by network equipment. For example, a network device may correspond to an eNB in a 4G system and a gNB in a 5G system.
另外,本申请实施例中的基站可以包括集中式单元(centralized unit,CU)和分布式单元(distributed unit,DU),多个DU可以由一个CU集中控制。CU和DU可以根据其具备的无线网络的协议层功能进行划分,例如分组数据汇聚协议(packet data convergence protocol,PDCP)层及以上协议层的功能设置在CU,PDCP以下的协议层,例如无线链路控制(radio link control,RLC)层和介质访问控制(medium access control,MAC)层等的功能设置在DU。需要说明的是,这种协议层的划分仅仅是一种举例,还可以在其它协议层划分。射频装置可以拉远,不放在DU中,也可以集成在DU中,或者部分拉远部分集成在DU中,本申请实施例不作任何限制。另外,在一些实施例中,还可以将CU的控制面(control plan,CP)和用户面(user plan,UP)分离,分成不同实体来实现,分别为控制面CU实体(CU-CP实体)和用户面CU实体(CU-UP实体)。在该网络架构中,CU产生的信令可以通过DU发送给终端设备,或者UE产生的信令可以通过DU发送给CU。DU可以不对该信令进行解析而直接通过协议层封装而透传给终端设备或CU。在该网络架构中,将CU划分为RAN侧的网络设备,此外,也可以将CU划分作为核心网(core network,CN)侧的网络设备,本申请对此不做限制。In addition, the base station in the embodiment of the present application may include a centralized unit (CU) and a distributed unit (DU), and multiple DUs may be centrally controlled by one CU. CU and DU can be divided according to the protocol layer functions of the wireless network they possess. For example, the functions of the packet data convergence protocol (PDCP) layer and above are set in CU and the protocol layer below PDCP, such as wireless link. Functions such as the radio link control (RLC) layer and the medium access control (medium access control, MAC) layer are set in the DU. It should be noted that this division of protocol layers is just an example, and division can also be performed on other protocol layers. The radio frequency device can be remote and not placed in the DU, or it can be integrated in the DU, or partially remote and partially integrated in the DU. The embodiments of this application do not impose any restrictions. In addition, in some embodiments, the control plane (CP) and user plane (UP) of the CU can also be separated and implemented into different entities, respectively control plane CU entities (CU-CP entities). and user plane CU entities (CU-UP entities). In this network architecture, the signaling generated by the CU can be sent to the terminal device through the DU, or the signaling generated by the UE can be sent to the CU through the DU. The DU may directly encapsulate the signaling through the protocol layer and transparently transmit it to the terminal device or CU without parsing the signaling. In this network architecture, the CU is divided into network equipment on the RAN side. In addition, the CU can also be divided into network equipment on the core network (core network, CN) side. This application does not limit this.
本申请中,网络设备也可以是中央处理单元(central processing element,CPE)、路由器等。In this application, the network device may also be a central processing unit (central processing element, CPE), router, etc.
本申请中,网络设备也可以是一个功能模块、芯片或芯片系统。可选地,功能模块、芯片或芯片系统可以设置于网络设备内。In this application, the network device can also be a functional module, chip or chip system. Optionally, the functional module, chip or chip system can be disposed in the network device.
在本申请实施例的描述中,以网络设备为例进行说明。In the description of the embodiments of this application, network equipment is taken as an example for explanation.
8)在本申请的描述中,“第一”、“第二”等词汇,仅用于区分描述的目的,而不能理解为指示或暗示相对重要性,也不能理解为指示或暗示顺序。8) In the description of this application, words such as "first" and "second" are only used for the purpose of distinguishing descriptions, and cannot be understood as indicating or implying relative importance, nor as indicating or implying order.
在本申请中的描述中,“至少一个(种)”是指一个(种)或者多个(种),多个(种)是指两个(种)或者两个(种)以上。“以下至少一项”或其类似表达,是指的这些项中的任意组合,包括单项或复数项的任意组合。例如,a,b,或c中的至少一项,可以表示:a,b,c,a和b,a和c,b和c,或,a和b和c,其中,a,b,c可以是单个,也可以是多个。In the description in this application, "at least one (species)" refers to one (species) or multiple (species), and multiple (species) refers to two (species) or more than two (species). "At least one of the following" or similar expressions thereof refers to any combination of these items, including any combination of single or plural items. For example, at least one of a, b, or c can mean: a, b, c, a and b, a and c, b and c, or a, b and c, where a, b, c Can be single or multiple.
本申请的描述中“和/或”,描述关联对象的关联关系,表示可以存在三种关系,例如,A和/或B,可以表示:单独存在A,同时存在A和B,单独存在B的情况,其中A、B可以是单数或者复数。“/”表示“或”,例如a/b表示a或b。"And/or" in the description of this application describes the relationship between associated objects, indicating that there can be three relationships, for example, A and/or B, which can mean: A exists alone, A and B exist simultaneously, and B exists alone. situation, where A and B can be singular or plural. "/" means "or", for example, a/b means a or b.
为了更加清晰地描述本申请实施例的技术方案,下面结合附图,对本申请实施例提供的通信方法及装置进行详细说明。In order to describe the technical solutions of the embodiments of the present application more clearly, the communication method and device provided by the embodiments of the present application will be described in detail below with reference to the accompanying drawings.
本申请实施例提供的通信方法可以应用于各类通信系统中,例如本申请提供的通信方法可以适用于长期演进(long term evolution,LTE)系统、第五代(5th generation,5G)通信系统(如新无线(new radio,NR)系统)、下一代无线局域网系统,以及未来的第六代(6th generation,6G)通信系统或其他系统等。The communication method provided by the embodiments of this application can be applied to various communication systems. For example, the communication method provided by this application can be applied to long term evolution (long term evolution, LTE) system, fifth generation (5th generation, 5G) communication system ( Such as new wireless (new radio, NR) system), next-generation wireless LAN system, and future sixth generation (6th generation, 6G) communication system or other systems.
图1示出了本申请提供的通信方法适用的一种可能的通信系统的架构,该通信系统中可以包括网络设备和至少两个终端设备,例如至少两个终端设备可以为图1所示的第一终端设备和第二终端设备。其中,第一终端设备和网络设备之间采用Uu接口通信,第一终端设备和第二终端设备使用非授权频谱进行SL通信,采用PC5接口通信。第一终端设备和第二终端设备可以工作在mode 1,也可以工作在mode2,即第一终端设备和第二终端设备获取SL资源的方式可以为mode 1,也可以为mode 2。Figure 1 shows the architecture of a possible communication system to which the communication method provided by this application is applicable. The communication system may include a network device and at least two terminal devices. For example, the at least two terminal devices may be as shown in Figure 1 first terminal device and second terminal device. Among them, the Uu interface is used for communication between the first terminal device and the network device. The first terminal device and the second terminal device use the unlicensed spectrum for SL communication and use the PC5 interface for communication. The first terminal device and the second terminal device can work in mode 1 or mode 2, that is, the first terminal device and the second terminal device can obtain SL resources in mode 1 or mode 2.
第一终端设备和第二终端设备之间的通信可以是单播通信,也可以是组播通信,本申请不作限定。The communication between the first terminal device and the second terminal device may be unicast communication or multicast communication, which is not limited in this application.
一种示例中,第一终端设备是数据的发送端,第二终端设备是数据的接收端,第二终端设备可以向第一终端设备进行物理侧行链路反馈信道(physical sidelink feedback channel,PSFCH)传输。应理解,当第二终端设备向第一终端设备发送PSFCH信息时,第二终端设备为发送端,第一终端设备为接收端。In one example, the first terminal device is the sender of data, the second terminal device is the receiver of data, and the second terminal device can perform a physical sidelink feedback channel (PSFCH) to the first terminal device. )transmission. It should be understood that when the second terminal device sends PSFCH information to the first terminal device, the second terminal device is the sending end and the first terminal device is the receiving end.
需要说明的是,图1所示的通信系统仅为示例性说明,并不作为对本申请通信系统的限定。通信系统中还可以包括其他设备,本申请不作限定。It should be noted that the communication system shown in Figure 1 is only an exemplary illustration and is not intended to limit the communication system of the present application. The communication system may also include other devices, which are not limited in this application.
图2示出了本申请提供的通信方法适用的另一种可能的通信系统的架构,该通信系统可以包括远端终端设备(remote UE)、中继终端设备(relay UE)、网络设备等。该通信系统可以应用于UE-中继(relay)
-网络(network)通信场景,即远端终端设备通过中继终端设备接入网络。其中远端终端设备和中继终端设备之间的通信为SL通信,远端终端设备和中继终端设备可以使用非授权频谱进行SL通信。Figure 2 shows the architecture of another possible communication system to which the communication method provided by this application is applicable. The communication system may include remote terminal equipment (remote UE), relay terminal equipment (relay UE), network equipment, etc. The communication system can be applied to UE-relay -Network communication scenario, that is, the remote terminal device accesses the network through the relay terminal device. The communication between the remote terminal equipment and the relay terminal equipment is SL communication, and the remote terminal equipment and the relay terminal equipment can use unlicensed spectrum for SL communication.
需要说明的是,图2所示的通信系统中不限于仅包含图2中所示的设备,还可以包含其它未在图2中表示的设备,具体本申请在此处不再一一列举。It should be noted that the communication system shown in FIG. 2 is not limited to only include the devices shown in FIG. 2 , but may also include other devices not shown in FIG. 2 , which will not be listed one by one in this application.
图3示出了本申请提供的通信方法适用的又一种可能的通信系统的架构,该通信系统可以包括至少三个终端设备,例如图3中示出的源终端设备(source UE)、中继终端设备(relay UE)、目标终端设备(target UE)等。该通信系统可以应用于UE-UE-UE中继通信场景,即源终端设备通过中继终端设备与目标终端设备通信。其中源终端设备和中继终端设备之间的通信为SL通信,源终端设备和中继终端设备可以使用非授权频谱进行SL通信。中继终端设备和目标终端设备之间的通信为SL通信,中继终端设备和目标终端设备可以使用非授权频谱进行SL通信。Figure 3 shows the architecture of another possible communication system to which the communication method provided by this application is applicable. The communication system can include at least three terminal devices, such as the source terminal equipment (source UE) shown in Figure 3, the middle Relay terminal equipment (relay UE), target terminal equipment (target UE), etc. The communication system can be applied to a UE-UE-UE relay communication scenario, that is, the source terminal device communicates with the target terminal device through the relay terminal device. The communication between the source terminal device and the relay terminal device is SL communication, and the source terminal device and the relay terminal device can use unlicensed spectrum for SL communication. The communication between the relay terminal equipment and the target terminal equipment is SL communication, and the relay terminal equipment and the target terminal equipment can use unlicensed spectrum for SL communication.
需要说明的是,图3所示的通信系统中不限于仅包含图3中所示的设备,还可以包含其它未在图3中表示的设备,具体本申请在此处不再一一列举。It should be noted that the communication system shown in FIG. 3 is not limited to only include the devices shown in FIG. 3 , but may also include other devices not shown in FIG. 3 , which will not be listed one by one in this application.
在SL-U中,针对SL HARQ反馈在PSFCH上传输时,目前还没有明确终端设备进行LBT过程的方法,可能会影响SL-U的通信质量。基于此,本申请实施例提供一种通信方法,以明确SL-U场景下,终端设备如何进行LBT,提升SL-U的通信质量。In SL-U, when SL HARQ feedback is transmitted on the PSFCH, there is currently no clear method for the terminal equipment to perform the LBT process, which may affect the communication quality of SL-U. Based on this, embodiments of this application provide a communication method to clarify how the terminal device performs LBT in the SL-U scenario and improve the communication quality of SL-U.
需要说明的是,在以下的实施例中,以终端设备和网络设备为例对本申请提供的通信方法进行详细说明,应理解终端设备执行的操作也可以通过终端设备中的处理器,或者是芯片或芯片系统,或者是一个功能模块等实现,网络设备执行的操作也可以通过网络设备中的处理器,或者是芯片或芯片系统,或者是一个功能模块等实现,对本申请对此不作限定。It should be noted that in the following embodiments, the communication method provided by this application is described in detail by taking terminal equipment and network equipment as examples. It should be understood that the operations performed by the terminal equipment can also be performed by the processor in the terminal equipment, or by the chip. Or a chip system, or a functional module, etc. The operations performed by the network device can also be implemented by a processor in the network device, or a chip or chip system, or a functional module, etc. This application is not limited to this.
基于以上描述,本申请实施例提供的一种通信方法,可以参阅图4所示。该方法的流程可以包括:Based on the above description, a communication method provided by the embodiment of the present application can be seen as shown in Figure 4 . The process of this method can include:
步骤401:第一终端设备确定第一CAPC。Step 401: The first terminal device determines the first CAPC.
在一种可选的实施方式中,第一终端设备可以通过如下方法确定第一CAPC:In an optional implementation, the first terminal device may determine the first CAPC through the following method:
方法a1、第一终端设备从网络设备接收第一DCI,第一DCI用于调度SL资源,第一DCI指示第一CAPC。Method a1: The first terminal device receives a first DCI from the network device, the first DCI is used to schedule SL resources, and the first DCI indicates the first CAPC.
可选的,在该方法a1中,第一终端设备可以基于动态授权的方式(dynamic grant,DG)进行SL传输。也即第一终端设备工作在mode1,网络设备通过第一DCI给第一终端设备调度SL资源。Optionally, in method a1, the first terminal device can perform SL transmission based on dynamic grant (DG). That is, the first terminal device works in mode 1, and the network device schedules SL resources to the first terminal device through the first DCI.
示例性的,第一DCI指示第一CAPC时,可以通过第一DCI中包括第一CAPC实现,也可以通过第一DCI中包括指示第一CAPC的信息实现,或者还可以通过其它方式实现,本申请不作限定。For example, when the first DCI indicates the first CAPC, it can be implemented by including the first CAPC in the first DCI, or it can be implemented by including information indicating the first CAPC in the first DCI, or it can also be implemented in other ways. There are no restrictions on application.
方法a2、第一终端设备根据第一预设规则和第一传输块(transport block,TB)确定第一CAPC。Method a2: The first terminal device determines the first CAPC according to the first preset rule and the first transport block (TB).
一种示例中,在该方法a2中,第一终端设备可以基于配置授权(configured grant,CG)的方式进行SL传输。也即,第一终端设备工作在mode1,网络设备通过RRC消息给第一终端设备配置SL配置授权。In one example, in method a2, the first terminal device may perform SL transmission based on configured grant (CG). That is, the first terminal device works in mode 1, and the network device configures SL configuration authorization for the first terminal device through an RRC message.
另一种示例中,在该方法a2中,第一终端设备可以基于mode2进行SL传输。In another example, in method a2, the first terminal device may perform SL transmission based on mode2.
可选的,所述第一TB可以为第一终端设备进行SL传输时的TB。Optionally, the first TB may be the TB when the first terminal device performs SL transmission.
可选的,所述第一TB可以为第一终端设备向第二终端设备进行SL传输时的TB。Optionally, the first TB may be the TB when the first terminal device performs SL transmission to the second terminal device.
示例性的,第一终端设备根据第一预设规则和第一TB确定第一CAPC,方法可以如下:Exemplarily, the first terminal device determines the first CAPC according to the first preset rule and the first TB. The method may be as follows:
方法b1、当第一TB中包括至少一个媒体接入控制控制元素(media access control control element,MAC CE)时,第一终端设备确定第一CAPC为至少一个MAC CE对应的CAPC中优先级最高的CAPC;当第一TB中未包括至少一个MAC CE,且包括至少一个侧行链路控制信道业务数据单元(sidelink control channel service data unit,SCCH SDU)时,第一终端设备确定第一CAPC为至少一个SCCH SDU对应的CAPC中优先级最高的CAPC;当第一TB中未包括至少一个MAC CE和至少一个SCCH SDU,且包括至少一个侧行链路业务信道业务数据单元(sidelink traffic channel service data unit,STCH SDU)时,第一终端设备确定第一CAPC为至少一个STCH SDU或至少一个逻辑信道(logical channel,LCH)对应的CAPC中优先级最低的CAPC。Method b1: When the first TB includes at least one media access control control element (MAC CE), the first terminal device determines the first CAPC as the highest priority among the CAPCs corresponding to at least one MAC CE. CAPC; when the first TB does not include at least one MAC CE and includes at least one sidelink control channel service data unit (SCCH SDU), the first terminal device determines that the first CAPC is at least The CAPC with the highest priority among the CAPCs corresponding to one SCCH SDU; when the first TB does not include at least one MAC CE and at least one SCCH SDU, and includes at least one sidelink traffic channel service data unit (sidelink traffic channel service data unit) , STCH SDU), the first terminal device determines the first CAPC to be the CAPC with the lowest priority among the CAPCs corresponding to at least one STCH SDU or at least one logical channel (logical channel, LCH).
也就是说,当第一TB中未包括至少一个MAC CE和至少一个SCCH SDU,且包括至少一个STCH SDU时,第一终端设备可以确定第一CAPC为至少一个STCH SDU对应的CAPC中优先级最低的CAPC,或者,第一终端设备也可以确定第一CAPC为至少一个LCH对应的CAPC中优先级最低的CAPC。That is to say, when the first TB does not include at least one MAC CE and at least one SCCH SDU, and includes at least one STCH SDU, the first terminal device can determine that the first CAPC is the lowest priority among the CAPCs corresponding to at least one STCH SDU. CAPC, or the first terminal device may also determine the first CAPC as the CAPC with the lowest priority among the CAPCs corresponding to at least one LCH.
其中,本申请中,优先级越高的CAPC的值越小,优先级越低的CAPC的值越大。
Among them, in this application, the value of CAPC with higher priority is smaller, and the value of CAPC with lower priority is larger.
可以理解,LCH可以是SCCH,也可以是STCH。一个SCCH SDU可以对应一个LCH,一个STCH SDU可以对应一个LCH。SCCH SDU对应的LCH与STCH SDU对应的LCH不相同。It can be understood that the LCH can be SCCH or STCH. One SCCH SDU can correspond to one LCH, and one STCH SDU can correspond to one LCH. The LCH corresponding to SCCH SDU is different from the LCH corresponding to STCH SDU.
方法b2、第一终端设备确定第一CAPC为第一TB中包含的至少一个LCH和/或至少一个MAC CE对应的CAPC中优先级最高的CAPC。Method b2: The first terminal device determines the first CAPC as the CAPC with the highest priority among the CAPCs corresponding to at least one LCH and/or at least one MAC CE included in the first TB.
方法b2中,第一CAPC可以为至少一个LCH对应的CAPC中优先级最高的CAPC,或者,第一CAPC可以为至少一个MAC CE对应的CAPC中优先级最高的CAPC,或者,第一CAPC可以为至少一个LCH和至少一个MAC CE对应的CAPC中优先级最高的CAPC。In method b2, the first CAPC may be the CAPC with the highest priority among the CAPCs corresponding to at least one LCH, or the first CAPC may be the CAPC with the highest priority among the CAPCs corresponding to at least one MAC CE, or the first CAPC may be The CAPC with the highest priority among the CAPCs corresponding to at least one LCH and at least one MAC CE.
可选的,至少一个LCH可以对应至少一个SCCH SDU,或者可以对应至少一个STCH SDU,或者也可以对应至少一个SCCH SDU和至少一个STCH SDU。Optionally, at least one LCH may correspond to at least one SCCH SDU, or may correspond to at least one STCH SDU, or may correspond to at least one SCCH SDU and at least one STCH SDU.
本申请中,第一TB包含至少一个LCH可以理解为第一TB包含至少一个LCH数据或至少一个LCH信息等。In this application, the first TB containing at least one LCH may be understood to mean that the first TB contains at least one LCH data or at least one LCH information.
相对于上述方法b1,该方法b2的实现复杂度较低。Compared with the above-mentioned method b1, the implementation complexity of this method b2 is lower.
方法a3、第一终端设备确定第一LCH或第一MAC CE对应的CAPC为第一CAPC,第一LCH或第一MAC CE用于触发第一终端设备选择或重选SL资源,第一LCH或第一MAC CE与CAPC存在对应关系。Method a3: The first terminal device determines that the CAPC corresponding to the first LCH or the first MAC CE is the first CAPC. The first LCH or the first MAC CE is used to trigger the first terminal device to select or reselect the SL resource. The first LCH or There is a corresponding relationship between the first MAC CE and CAPC.
可选的,在该方法a3中,第一终端设备可以基于mode2进行SL传输。Optionally, in method a3, the first terminal device may perform SL transmission based on mode2.
一种可能的方式中,第一终端设备选择或重选SL资源,可以在与之前选择SL资源相同的SL资源池中选择或重选,也可以在不同的SL资源池进行选择或重选。In one possible way, the first terminal device selects or reselects the SL resource. It may select or reselect from the same SL resource pool as the previously selected SL resource, or it may select or reselect from a different SL resource pool.
步骤402:第一终端设备向第二终端设备发送第一信息,相应地,第二终端设备从第一终端设备接收第一信息,第一信息用于指示第二CAPC,第二CAPC用于第二终端设备针对第一PSFCH进行LBT。Step 402: The first terminal device sends the first information to the second terminal device. Correspondingly, the second terminal device receives the first information from the first terminal device. The first information is used to indicate the second CAPC, and the second CAPC is used to indicate the second CAPC. The second terminal equipment performs LBT on the first PSFCH.
一种可能的示例中,第二CAPC与第一CAPC相同。In a possible example, the second CAPC is the same as the first CAPC.
另一种可能的示例中,第二CAPC基于第一CAPC确定,第二CAPC与第一CAPC不同。In another possible example, the second CAPC is determined based on the first CAPC, and the second CAPC is different from the first CAPC.
例如,第二CAPC基于第一CAPC确定时,第二CAPC可以是第一CAPC减去N得到的值,N为大于或者等于1的整数。可选的,当第一CAPC减去N得到的值小于1时,第二CAPC可以为1。For example, when the second CAPC is determined based on the first CAPC, the second CAPC may be the value obtained by subtracting N from the first CAPC, where N is an integer greater than or equal to 1. Optionally, when the value obtained by subtracting N from the first CAPC is less than 1, the second CAPC may be 1.
可选的,第一信息用于指示第二CAPC,可以通过第一信息中包括第二CAPC实现,也可以通过第一信息中包括指示第二CAPC的信息实现,或者还可以通过其它方式实现,本申请对此不作限定。Optionally, the first information is used to indicate the second CAPC, which can be implemented by including the second CAPC in the first information, or by including information indicating the second CAPC in the first information, or it can also be implemented in other ways, This application does not limit this.
可选的,第一信息可以为侧行控制信息(sidelink control information,SCI)。Optionally, the first information may be sidelink control information (SCI).
在一种可选的实施方式中,第一信息还可以指示第二CAPC用于PSFCH传输。具体的,可以通过如下两种方式指示:In an optional implementation, the first information may also indicate that the second CAPC is used for PSFCH transmission. Specifically, it can be indicated in the following two ways:
方式c1、第一信息包括第一指示信息,第一指示信息用于指示第二CAPC用于PSFCH传输。In manner c1, the first information includes first indication information, and the first indication information is used to instruct the second CAPC to be used for PSFCH transmission.
例如,第一信息为SCI时,第一指示信息可以为SCI中的专用的域(field)。For example, when the first information is SCI, the first indication information may be a dedicated field in the SCI.
方式c2、第一信息的格式为第一格式,第一格式用于指示第二CAPC用于PSFCH传输。In mode c2, the format of the first information is the first format, and the first format is used to indicate that the second CAPC is used for PSFCH transmission.
例如,第一信息为SCI时,指示第二CAPC用于PSFCH传输的SCI与其他作用的SCI的SCI格式(format)不同。例如,指示第二CAPC用于PSFCH传输的SCI与承载SL COT共享(sharing)的SCI的SCI格式不同。For example, when the first information is the SCI, it indicates that the SCI used by the second CAPC for PSFCH transmission is different from the SCI format of other functioning SCIs. For example, the SCI indicating that the second CAPC is used for PSFCH transmission is in a different format than the SCI carrying SL COT sharing.
步骤403:第二终端设备根据第二CAPC针对第一PSFCH进行LBT。Step 403: The second terminal device performs LBT on the first PSFCH according to the second CAPC.
可选的,第一PSFCH可以是基于物理侧行共享信道(physical sidelink control channel,PSSCH)与PSFCH的映射关系确定的,或者,第一PSFCH可以为第一终端设备指示的。在这种情况下,当第一PSFCH是基于映射关系或第一终端设备指示确定时,也即是PSFCH的确定和实际的业务通信相关时,第二终端设备可以基于第一终端设备指示的CAPC针对PSFCH进行LBT,可以使得PSFCH传输的CAPC可以灵活适配实际的业务通信需求,提升SL-U的通信质量。Optionally, the first PSFCH may be determined based on the mapping relationship between a physical sidelink control channel (PSSCH) and the PSFCH, or the first PSFCH may be indicated by the first terminal device. In this case, when the first PSFCH is determined based on the mapping relationship or the indication of the first terminal equipment, that is, when the determination of the PSFCH is related to the actual service communication, the second terminal equipment may be based on the CAPC indicated by the first terminal equipment. LBT for PSFCH can enable the CAPC transmitted by PSFCH to flexibly adapt to actual business communication needs and improve the communication quality of SL-U.
在一种可选的实施方式中,第二终端设备根据第二CAPC针对第一PSFCH进行LBT时,可以包括如下方法:In an optional implementation, when the second terminal device performs LBT for the first PSFCH according to the second CAPC, the following method may be included:
方法d1、第二终端设备直接根据第二CAPC针对第一PSFCH进行LBT。Method d1: The second terminal device directly performs LBT on the first PSFCH according to the second CAPC.
在方法d1中,也即第二终端设备不对第二CAPC进行处理,直接使用第二CAPC即可。In method d1, that is, the second terminal device does not process the second CAPC and can directly use the second CAPC.
方法d2、第二终端设备根据第二CAPC确定第三CAPC,进而,第二终端设备根据第三CAPC针对第一PSFCH进行LBT。Method d2: The second terminal device determines the third CAPC based on the second CAPC, and further, the second terminal device performs LBT on the first PSFCH based on the third CAPC.
示例性的,第二终端设备可以在确定第二CAPC小于或者等于第一阈值时,第二终端设备确定第
三CAPC;或者,第二终端设备可以在确定第二CAPC大于所述第一阈值时,第二终端设备确定第三CAPC。For example, when the second terminal device determines that the second CAPC is less than or equal to the first threshold, the second terminal device determines that the second CAPC is less than or equal to the first threshold. Three CAPC; alternatively, when the second terminal device determines that the second CAPC is greater than the first threshold, the second terminal device determines the third CAPC.
可选的,在第二CAPC小于或者等于第一阈值时第二终端设备确定的第三CAPC,与在第二CAPC大于第一阈值时第二终端设备确定的第三CAPC不相同。Optionally, the third CAPC determined by the second terminal device when the second CAPC is less than or equal to the first threshold is different from the third CAPC determined by the second terminal device when the second CAPC is greater than the first threshold.
其中,第一阈值,在第二CAPC小于或者等于第一阈值时第二终端设备确定的第三CAPC,以及在第二CAPC大于第一阈值时第二终端设备确定的第三CAPC,可以为预定义的,或者可以为网络设备配置的,或者为第一终端设备配置的,或者可以为第二终端设备自己确定的。The first threshold, the third CAPC determined by the second terminal device when the second CAPC is less than or equal to the first threshold, and the third CAPC determined by the second terminal device when the second CAPC is greater than the first threshold, may be predetermined. Defined, or can be configured for the network device, or configured for the first terminal device, or can be determined by the second terminal device itself.
在一种可选的实施方式中,当第二终端设备针对多个PSFCH进行LBT时,可以使用相同的CAPC,例如均使用上述第二CAPC。In an optional implementation, when the second terminal device performs LBT for multiple PSFCHs, the same CAPC can be used, for example, the above-mentioned second CAPC is used.
本申请中,多个PSFCH传输对应同一个PSSCH传输。第一PSFCH可以是同一个PSSCH传输对应的多个PSFCH中的任一个PSFCH,例如可以是第一个PSFCH或其他PSFCH,本申请不作限定。In this application, multiple PSFCH transmissions correspond to the same PSSCH transmission. The first PSFCH may be any PSFCH among multiple PSFCHs corresponding to the same PSSCH transmission, for example, it may be the first PSFCH or other PSFCH, which is not limited in this application.
在一种可选的实施方式中,当第二终端设备针对多个PSFCH进行LBT时,也可以使用不同的CAPC,以使得后续PSFCH执行LBT使用更高优先级的CAPC,提升PSFCH传输的可靠性,从而提高整体的SL-U的通信质量。In an optional implementation, when the second terminal device performs LBT for multiple PSFCHs, different CAPCs can also be used, so that subsequent PSFCH executions of LBT use higher priority CAPCs to improve the reliability of PSFCH transmission. , thereby improving the overall SL-U communication quality.
例如,第二终端设备可以根据第二CAPC确定第四CAPC,进而第二终端设备根据第四CAPC针对第二PSFCH进行LBT。其中,第二PSFCH可以为第一PSFCH之后的某一个PSFCH,例如当第一PSFCH为多个PSFCH中的第一个PSFCH时,第二PSFCH可以是多个PSFCH中的第二个PSFCH,或者第三个PSFCH,或者之后的某一个PSFCH。For example, the second terminal device may determine the fourth CAPC according to the second CAPC, and then the second terminal device may perform LBT on the second PSFCH according to the fourth CAPC. The second PSFCH may be a certain PSFCH after the first PSFCH. For example, when the first PSFCH is the first PSFCH among multiple PSFCHs, the second PSFCH may be the second PSFCH among the multiple PSFCHs, or the second PSFCH may be the second PSFCH among the plurality of PSFCHs. Three PSFCHs, or one of the following PSFCHs.
可选的,第二终端设备将第二CAPC减去M,得到第四CAPC,M为大于或者等于1的整数。Optionally, the second terminal device subtracts M from the second CAPC to obtain the fourth CAPC, where M is an integer greater than or equal to 1.
其中,第二PSFCH为第一PSFCH之后的不同PSFCH时,对应的M值不同。例如,记第一PSFCH为第一个PSFCH,当第二PSFCH为第二个PSFCH时,对应的M值可以为A;当第二PSFCH为第三个PSFCH时,对应的M值为2A;依次类推,不再一一示例,其中A为大于或者等于1的整数。应理解,这里仅以第一PSFCH为第一个PSFCH为例说明,不作为对第一PSFCH为多个PSFCH中哪一个PSFCH的限定。Wherein, when the second PSFCH is a different PSFCH after the first PSFCH, the corresponding M value is different. For example, the first PSFCH is the first PSFCH, and when the second PSFCH is the second PSFCH, the corresponding M value can be A; when the second PSFCH is the third PSFCH, the corresponding M value is 2A; in sequence By analogy, we will not give examples one by one, where A is an integer greater than or equal to 1. It should be understood that the description here only takes the first PSFCH as the first PSFCH as an example, and does not limit which PSFCH among the plurality of PSFCHs the first PSFCH is.
也就是说,之后的每一个PSFCH对应的CAPC为上一个PSFCH对应的CAPC减去A。In other words, the CAPC corresponding to each subsequent PSFCH is the CAPC corresponding to the previous PSFCH minus A.
可选的,当一个PSSCH对应多个PSFCH时,多个PSFCH中的第一个PSFCH对应的CAPC可以作为初始CAPC,第一个PSFCH之后的每一个PSFCH对应的CAPC可以为上一个PSFCH对应的CAPC减A。例如,当第一PSFCH为多个PSFCH中的第一个PSFCH时,初始CAPC可以为第二CAPC。Optionally, when one PSSCH corresponds to multiple PSFCHs, the CAPC corresponding to the first PSFCH among the multiple PSFCHs can be used as the initial CAPC, and the CAPC corresponding to each PSFCH after the first PSFCH can be the CAPC corresponding to the previous PSFCH. Minus A. For example, when the first PSFCH is the first PSFCH among multiple PSFCHs, the initial CAPC may be the second CAPC.
可选的,在某一个PSFCH基于上一个PSFCH对应CAPC减去A得到对应的CAPC时,上一个PSFCH对应的CAPC大于1时执行上述减操作。也就是说,在某一个PSFCH对应的CAPC小于或者等于1时,后面的PSFCH不再执行上述减操作,后面的PSFCH对应的CAPC可以均使用1。Optionally, when a certain PSFCH obtains the corresponding CAPC based on the CAPC corresponding to the previous PSFCH minus A, the above subtraction operation is performed when the CAPC corresponding to the previous PSFCH is greater than 1. That is to say, when the CAPC corresponding to a certain PSFCH is less than or equal to 1, the subsequent PSFCH will no longer perform the above subtraction operation, and the CAPC corresponding to the subsequent PSFCH can all use 1.
其中,上述是基于第一PSFCH对应的CAPC为第二CAPC为例说明,应理解,当如上述方法d2中所述,第一PSFCH对应第三CAPC的情况下,第一PSFCH之后的下一个PSFCH对应的CAPC可以为第三CAPC减去A得到。例如,当第一PSFCH为多个PSFCH中的第一个PSFCH时,初始CAPC可以为第三CAPC,下一个PSFCH(也即第二个PSFCH)对应的CAPC可以为第三CAPC减去A得到。Among them, the above is an example based on the CAPC corresponding to the first PSFCH being the second CAPC. It should be understood that when the first PSFCH corresponds to the third CAPC as described in the above method d2, the next PSFCH after the first PSFCH The corresponding CAPC can be obtained by subtracting A from the third CAPC. For example, when the first PSFCH is the first PSFCH among multiple PSFCHs, the initial CAPC may be the third CAPC, and the CAPC corresponding to the next PSFCH (that is, the second PSFCH) may be the third CAPC minus A.
在一种可选的实施方式中,当第二终端设备针对第一PSFCH进行LBT失败时,第二终端设备针对第二PSFCH进行LBT。当然,在第二终端设备针对第一PSFCH进行LBT成功时,第二终端设备也可以针对第二PSFCH进行LBT,本申请不作限定。In an optional implementation manner, when the second terminal device fails to perform LBT on the first PSFCH, the second terminal device performs LBT on the second PSFCH. Of course, when the second terminal device successfully performs LBT on the first PSFCH, the second terminal device may also perform LBT on the second PSFCH, which is not limited in this application.
在一种可能的设计中,第二终端设备接收到第二信息,第二信息用于指示基于第二CAPC确定第四CAPC,并根据第四CAPC针对第二PSFCH进行LBT。也即,第二信息指示第二PSFCH对应的CAPC基于第一PSFCH对应的CAPC确定,第二终端设备接收到第二信息之后再执行上述减M操作。In a possible design, the second terminal device receives second information, and the second information is used to indicate determining the fourth CAPC based on the second CAPC, and performing LBT for the second PSFCH based on the fourth CAPC. That is, the second information indicates that the CAPC corresponding to the second PSFCH is determined based on the CAPC corresponding to the first PSFCH, and the second terminal device performs the above-mentioned subtraction operation after receiving the second information.
可选的,第二终端设备可以从网络设备接收该第二信息,或者也可以从第一终端设备接收第二信息。Optionally, the second terminal device may receive the second information from the network device, or may also receive the second information from the first terminal device.
采用本申请实施例提供的上述通信方法,第二终端设备可以基于第一终端设备指示的CAPC针对PSFCH进行LBT,可以使得PSFCH传输的CAPC可以灵活适配实际的业务通信需求,提升SL-U的通信质量。Using the above communication method provided by the embodiment of the present application, the second terminal device can perform LBT on the PSFCH based on the CAPC indicated by the first terminal device, which can make the CAPC transmitted by the PSFCH flexibly adapt to actual business communication requirements and improve the performance of SL-U. Communication quality.
基于以上描述,本申请实施例提供的另一种通信方法,可以参阅图5所示。该方法的流程可以包括:Based on the above description, another communication method provided by the embodiment of the present application can be seen as shown in FIG. 5 . The process of this method can include:
步骤501:第二终端设备从第一终端设备接收SCI。Step 501: The second terminal device receives the SCI from the first terminal device.
步骤502:第二终端设备确定SCI未指示CAPC时,根据预定义的CAPC针对第一PSFCH进行LBT。
Step 502: When the second terminal device determines that the SCI does not indicate CAPC, it performs LBT on the first PSFCH according to the predefined CAPC.
在一种可选的实施方式中,第一PSFCH可以为第二终端设备确定的,第二终端设备确定第一PSFCH的方式本申请不作限定。在这种情况下,当第一PSFCH是所述第二终端设备确定时,也即PSFCH的确定和实际的业务通信不直接相关时,第二终端设备基于预定义的CAPC针对PSFCH进行LBT,可以使得PSFCH传输的CAPC在某些情况下可以不用适配实际的业务通信需求,而使用较高优先级的CAPC进行PSFCH传输,进而提升SL-U的通信质量。In an optional implementation manner, the first PSFCH may be determined by the second terminal device, and the manner in which the second terminal device determines the first PSFCH is not limited in this application. In this case, when the first PSFCH is determined by the second terminal device, that is, when the determination of the PSFCH is not directly related to the actual service communication, the second terminal device performs LBT on the PSFCH based on the predefined CAPC. This allows the CAPC for PSFCH transmission to be used in some cases without adapting to actual business communication requirements, and uses higher priority CAPC for PSFCH transmission, thus improving the communication quality of SL-U.
在一种可选的实施方式中,当第二终端设备针对多个PSFCH进行LBT时,可以使用相同的CAPC,例如均使用上述预定义的CAPC。In an optional implementation, when the second terminal device performs LBT for multiple PSFCHs, the same CAPC may be used, for example, the above-mentioned predefined CAPC may be used.
本申请中,多个PSFCH传输对应同一个PSSCH传输。第一PSFCH可以是同一个PSSCH传输对应的多个PSFCH中的任一个PSFCH,例如可以是第一个PSFCH或其他PSFCH,本申请不作限定。In this application, multiple PSFCH transmissions correspond to the same PSSCH transmission. The first PSFCH may be any PSFCH among multiple PSFCHs corresponding to the same PSSCH transmission, for example, it may be the first PSFCH or other PSFCH, which is not limited in this application.
在一种可选的实施方式中,当第二终端设备针对多个PSFCH进行LBT时,也可以使用不同的CAPC,以使得后续PSFCH执行LBT使用更高优先级的CAPC,提升PSFCH传输的可靠性,从而提高整体的SL-U的通信质量。In an optional implementation, when the second terminal device performs LBT for multiple PSFCHs, different CAPCs can also be used, so that subsequent PSFCH executions of LBT use higher priority CAPCs to improve the reliability of PSFCH transmission. , thereby improving the overall SL-U communication quality.
例如,第二终端设备根据预定义的CAPC确定第五CAPC,进而第二终端设备根据第五CAPC针对第二PSFCH进行LBT。其中,第二PSFCH可以为第一PSFCH之后的某一个PSFCH,例如当第一PSFCH为多个PSFCH中的第一个PSFCH时,第二PSFCH可以是多个PSFCH中的第二个PSFCH,或者第三个PSFCH,或者之后的某一个PSFCH。For example, the second terminal device determines the fifth CAPC according to the predefined CAPC, and then the second terminal device performs LBT on the second PSFCH according to the fifth CAPC. The second PSFCH may be a certain PSFCH after the first PSFCH. For example, when the first PSFCH is the first PSFCH among multiple PSFCHs, the second PSFCH may be the second PSFCH among the multiple PSFCHs, or the second PSFCH may be the second PSFCH among the plurality of PSFCHs. Three PSFCHs, or one of the following PSFCHs.
可选的,第二终端设备可以将预定义的CAPC减去S,得到第五CAPC,S为大于或者等于1的整数。Optionally, the second terminal device can subtract S from the predefined CAPC to obtain the fifth CAPC, where S is an integer greater than or equal to 1.
其中,第二PSFCH为第一PSFCH之后的不同PSFCH时,对应的S值不同。例如,记第一PSFCH为第一个PSFCH,当第二PSFCH为第二个PSFCH时,对应的S值可以为B;当第二PSFCH为第三个PSFCH时,对应的M值为2B;依次类推,不再一一示例,其中B为大于或者等于1的整数。应理解,这里仅以第一PSFCH为第一个PSFCH为例说明,不作为对第一PSFCH为多个PSFCH中哪一个PSFCH的限定。Wherein, when the second PSFCH is a different PSFCH after the first PSFCH, the corresponding S value is different. For example, the first PSFCH is the first PSFCH, and when the second PSFCH is the second PSFCH, the corresponding S value can be B; when the second PSFCH is the third PSFCH, the corresponding M value is 2B; in sequence By analogy, we will not give examples one by one, where B is an integer greater than or equal to 1. It should be understood that the description here only takes the first PSFCH as the first PSFCH as an example, and does not limit which PSFCH among the plurality of PSFCHs the first PSFCH is.
也就是说,之后的每一个PSFCH对应的CAPC为上一个PSFCH对应的CAPC减去B。In other words, the CAPC corresponding to each subsequent PSFCH is the CAPC corresponding to the previous PSFCH minus B.
可选的,当一个PSSCH对应多个PSFCH时,多个PSFCH中的第一个PSFCH对应的CAPC可以作为初始CAPC,第一个PSFCH之后的每一个PSFCH对应的CAPC可以为上一个PSFCH对应的CAPC减B。例如,当第一PSFCH为多个PSFCH中的第一个PSFCH时,初始CAPC可以为预定义的CAPC。Optionally, when one PSSCH corresponds to multiple PSFCHs, the CAPC corresponding to the first PSFCH among the multiple PSFCHs can be used as the initial CAPC, and the CAPC corresponding to each PSFCH after the first PSFCH can be the CAPC corresponding to the previous PSFCH. Minus B. For example, when the first PSFCH is the first PSFCH among multiple PSFCHs, the initial CAPC may be a predefined CAPC.
可选的,在某一个PSFCH基于上一个PSFCH对应CAPC减去B得到对应的CAPC时,上一个PSFCH对应的CAPC大于1时执行上述减操作。也就是说,在某一个PSFCH对应的CAPC小于或者等于1时,后面的PSFCH不再执行上述减操作,后面的PSFCH对应的CAPC可以均使用1。Optionally, when a certain PSFCH obtains the corresponding CAPC based on subtracting B from the CAPC corresponding to the previous PSFCH, the above subtraction operation is performed when the CAPC corresponding to the previous PSFCH is greater than 1. That is to say, when the CAPC corresponding to a certain PSFCH is less than or equal to 1, the subsequent PSFCH will no longer perform the above subtraction operation, and the CAPC corresponding to the subsequent PSFCH can all use 1.
在一种可选的实施方式中,当第二终端设备针对第一PSFCH进行LBT失败时,第二终端设备针对第二PSFCH进行LBT。当然,在第二终端设备针对第一PSFCH进行LBT成功时,第二终端设备也可以针对第二PSFCH进行LBT,本申请不作限定。In an optional implementation manner, when the second terminal device fails to perform LBT on the first PSFCH, the second terminal device performs LBT on the second PSFCH. Of course, when the second terminal device successfully performs LBT on the first PSFCH, the second terminal device may also perform LBT on the second PSFCH, which is not limited in this application.
示例性的,第二终端设备接收到第三信息,第三信息用于指示基于预定义的CAPC确定第五CAPC,并根据第五CAPC针对第二PSFCH进行LBT。也即,第三信息指示第二PSFCH对应的CAPC基于预定义的CAPC确定,第二终端设备接收到第三信息之后再执行上述减S操作。Exemplarily, the second terminal device receives the third information, and the third information is used to instruct to determine the fifth CAPC based on the predefined CAPC, and perform LBT for the second PSFCH according to the fifth CAPC. That is, the third information indicates that the CAPC corresponding to the second PSFCH is determined based on the predefined CAPC, and the second terminal device performs the above-mentioned subtraction S operation after receiving the third information.
可选的,第二终端设备可以从网络设备接收该第三信息,或者也可以从第一终端设备接收第三信息。Optionally, the second terminal device may receive the third information from the network device, or may also receive the third information from the first terminal device.
采用本申请实施例提供的上述通信方法,第二终端设备基于预定义的CAPC针对PSFCH进行LBT,可以使得PSFCH传输的CAPC在某些情况下可以不用适配实际的业务通信需求,而使用较高优先级的CAPC进行PSFCH传输,进而提升SL-U的通信质量。Using the above communication method provided by the embodiment of the present application, the second terminal device performs LBT for PSFCH based on the predefined CAPC, which can make the CAPC of PSFCH transmission not need to adapt to the actual business communication requirements in some cases, but use higher The priority CAPC performs PSFCH transmission, thereby improving the communication quality of SL-U.
在一种可能的实施例中,第二终端设备从第一终端设备接收到指示第二CAPC的第一信息,后续第二终端设备可以从第二CAPC和预定义的CAPC中选择一个CAPC针对第一PSFCH进行LBT。例如,当第一PSFCH是基于PSSCH与PSFCH的映射关系确定的,或者,第一PSFCH为第一终端设备指示的时,第二终端设备选择第二CAPC。又例如,当第一PSFCH可以为第二终端设备确定的时,第二终端设备可以选择预定义的CAPC。当然,第二终端设备还可以通过其它方式选择一个CAPC,本申请不作限定。同样的,当第二终端设备针对同一个PSSCH传输对应的多个PSFCH进行LBT时,第一PSFCH可以是同一个PSSCH传输对应的多个PSFCH中的任一个PSFCH,例如可以是第一个PSFCH或其他PSFCH,本申请不作限定。可选的,当第二终端设备针对多个PSFCH进行LBT时,可以使用相同的
CAPC,也可以使用不同的CAPC,具体方法可以参见上述实施例的描述,此处不再详细介绍。In a possible embodiment, the second terminal device receives the first information indicating the second CAPC from the first terminal device, and subsequently the second terminal device can select a CAPC from the second CAPC and the predefined CAPC to target the first CAPC. A PSFCH performs LBT. For example, when the first PSFCH is determined based on the mapping relationship between PSSCH and PSFCH, or when the first PSFCH is indicated by the first terminal device, the second terminal device selects the second CAPC. For another example, when the first PSFCH may be determined by the second terminal device, the second terminal device may select a predefined CAPC. Of course, the second terminal device can also select a CAPC through other methods, which is not limited in this application. Similarly, when the second terminal device performs LBT on multiple PSFCHs corresponding to the same PSSCH transmission, the first PSFCH may be any one of the multiple PSFCHs corresponding to the same PSSCH transmission, for example, it may be the first PSFCH or Other PSFCHs are not limited in this application. Optionally, when the second terminal device performs LBT for multiple PSFCHs, the same CAPC, different CAPC can also be used. For specific methods, please refer to the description of the above embodiment, and will not be introduced in detail here.
在又一种可能的实施例中,当第一PSFCH传输的时刻或者部分时刻也存在其他SL传输(例如PSSCH传输),该SL传输可以是针对第一终端设备的也可以是针对其他终端设备的,终端设备可以确定使用该SL传输的TB所对应的CAPC对第一PSFCH进行LBT。In another possible embodiment, when the first PSFCH transmission time or part of the time also exists other SL transmission (such as PSSCH transmission), the SL transmission may be for the first terminal device or for other terminal devices. , the terminal equipment can determine to use the CAPC corresponding to the TB transmitted by the SL to perform LBT on the first PSFCH.
基于以上实施例,本申请实施例还提供了一种通信装置,参阅图6所示,通信装置600可以包括收发单元601和处理单元602。其中,所述收发单元601用于所述通信装置600进行通信,例如接收信息、消息或数据等,或者,发送信息、消息或数据等,所述处理单元602用于对所述通信装置600的动作进行控制管理。所述处理单元602还可以控制所述收发单元601执行的步骤。Based on the above embodiments, embodiments of the present application also provide a communication device. Referring to FIG. 6 , the communication device 600 may include a transceiver unit 601 and a processing unit 602 . The transceiver unit 601 is used for communicating with the communication device 600 , such as receiving information, messages or data, etc., or sending information, messages or data, etc., and the processing unit 602 is used for processing the communication device 600 . Actions are controlled and managed. The processing unit 602 can also control the steps performed by the transceiver unit 601.
示例性地,该通信装置600具体可以是上述实施例中的第一终端设备、所述第一终端设备的处理器,或者芯片,或者芯片系统,或者是一个功能模块等。或者,该通信装置600具体可以是上述实施例中的第二终端设备、所述第二终端设备的处理器,或者芯片,或者芯片系统,或者是一个功能模块等。For example, the communication device 600 may be the first terminal device in the above embodiment, a processor of the first terminal device, a chip, a chip system, a functional module, etc. Alternatively, the communication device 600 may specifically be the second terminal device in the above embodiment, a processor of the second terminal device, or a chip, or a chip system, or a functional module, etc.
在一个实施例中,所述通信装置600用于实现上述图4所示的实施例中第一终端设备的功能时,所述处理单元602可以用于确定第一CAPC;所述收发单元601可以用于向第二终端设备发送第一信息,所述第一信息用于指示第二CAPC,所述第二CAPC与所述第一CAPC相同,或者所述第二CAPC基于所述第一CAPC确定;所述第二CAPC用于所述第二终端设备针对第一物理侧行链路反馈信道PSFCH进行先听后说LBT。In one embodiment, when the communication device 600 is used to implement the functions of the first terminal device in the embodiment shown in Figure 4, the processing unit 602 can be used to determine the first CAPC; the transceiver unit 601 can Used to send first information to the second terminal device, the first information being used to indicate a second CAPC, the second CAPC is the same as the first CAPC, or the second CAPC is determined based on the first CAPC ; The second CAPC is used for the second terminal equipment to perform listen-before-talk LBT for the first physical sidelink feedback channel PSFCH.
一种示例中,所述处理单元602在确定所述第一CAPC时,可以用于:控制所述收发单元601从网络设备接收第一下行控制信息DCI,所述第一DCI用于调度侧行链路SL资源,所述第一DCI指示所述第一CAPC。In an example, when determining the first CAPC, the processing unit 602 may be configured to: control the transceiver unit 601 to receive the first downlink control information DCI from the network device, where the first DCI is used for the scheduling side. Link SL resource, the first DCI indicates the first CAPC.
另一种示例中,所述处理单元602在确定所述第一CAPC时,可以用于:根据第一预设规则和第一传输块TB确定所述第一CAPC。In another example, when determining the first CAPC, the processing unit 602 may be configured to: determine the first CAPC according to the first preset rule and the first transmission block TB.
可选的,所述处理单元602在根据所述第一预设规则和所述第一TB确定所述第一CAPC时,可以用于:Optionally, when determining the first CAPC according to the first preset rule and the first TB, the processing unit 602 may be used to:
当所述第一TB中包括至少一个媒体接入控制控制元素MAC CE时,确定所述第一CAPC为所述至少一个MAC CE对应的CAPC中优先级最高的CAPC;When the first TB includes at least one media access control control element MAC CE, determine the first CAPC to be the CAPC with the highest priority among the CAPCs corresponding to the at least one MAC CE;
当所述第一TB中未包括所述至少一个MAC CE,且包括至少一个侧行链路控制信道业务数据单元SCCH SDU时,确定所述第一CAPC为所述至少一个SCCH SDU对应的CAPC中优先级最高的CAPC;When the first TB does not include the at least one MAC CE and includes at least one sidelink control channel service data unit SCCH SDU, it is determined that the first CAPC is the CAPC corresponding to the at least one SCCH SDU. CAPC with the highest priority;
当所述第一TB中未包括所述至少一个MAC CE和所述至少一个SCCH SDU,且包括至少一个侧行链路业务信道业务数据单元STCH SDU时,确定所述第一CAPC为所述至少一个STCH SDU对应的CAPC中优先级最低的CAPC。When the first TB does not include the at least one MAC CE and the at least one SCCH SDU and includes at least one sidelink service channel service data unit STCH SDU, it is determined that the first CAPC is the at least one SCCH SDU. The CAPC with the lowest priority among the CAPCs corresponding to an STCH SDU.
可选的,所述处理单元602在根据所述第一预设规则和所述第一TB确定所述第一CAPC时,可以用于:确定所述第一CAPC为所述第一TB中包含的至少一个逻辑信道LCH和/或至少一个媒体接入控制控制元素MAC CE对应的CAPC中优先级最高的CAPC。Optionally, when determining the first CAPC according to the first preset rule and the first TB, the processing unit 602 may be configured to: determine that the first CAPC is included in the first TB. The CAPC with the highest priority among the CAPCs corresponding to at least one logical channel LCH and/or at least one media access control control element MAC CE.
又一种示例中,所述处理单元602在确定所述第一CAPC时,可以用于:确定第一LCH或第一MAC CE对应的CAPC为所述第一CAPC,所述第一LCH或第一MAC CE用于触发所述第一终端设备选择或重选SL资源,所述第一LCH或第一MAC CE与所述CAPC存在对应关系。In another example, when determining the first CAPC, the processing unit 602 may be used to: determine that the CAPC corresponding to the first LCH or the first MAC CE is the first CAPC, and the first LCH or the first MAC CE is the first CAPC. A MAC CE is used to trigger the first terminal device to select or reselect SL resources, and there is a corresponding relationship between the first LCH or the first MAC CE and the CAPC.
在一种可能的方式中,所述第一信息包括第一指示信息,所述第一指示信息用于指示所述第二CAPC用于PSFCH传输。In a possible manner, the first information includes first indication information, and the first indication information is used to instruct the second CAPC to be used for PSFCH transmission.
在另一种可能的方式中,所述第一信息的格式为第一格式,所述第一格式用于指示所述第二CAPC用于PSFCH传输。In another possible manner, the format of the first information is a first format, and the first format is used to indicate that the second CAPC is used for PSFCH transmission.
在另一个实施例中,所述通信装置600用于实现上述图4所示的实施例中第二终端设备的功能时,所述收发单元601可以用于从第一终端设备接收第一信息,所述第一信息用于指示第二CAPC;所述处理单元602可以用于根据所述第二CAPC针对第一物理侧行链路反馈信道PSFCH进行先听后说LBT。In another embodiment, when the communication device 600 is used to implement the functions of the second terminal device in the embodiment shown in Figure 4, the transceiver unit 601 can be used to receive the first information from the first terminal device, The first information is used to indicate the second CAPC; the processing unit 602 may be configured to perform listen-before-talk LBT for the first physical sidelink feedback channel PSFCH according to the second CAPC.
一种示例中,所述第一信息可以包括第一指示信息,所述第一指示信息用于指示所述第二CAPC用于PSFCH传输。In an example, the first information may include first indication information, and the first indication information is used to instruct the second CAPC to be used for PSFCH transmission.
另一种示例中,所述第一信息的格式可以为第一格式,所述第一格式用于指示所述第二CAPC用于PSFCH传输。In another example, the format of the first information may be a first format, and the first format is used to indicate that the second CAPC is used for PSFCH transmission.
可选的,所述第一PSFCH可以基于物理侧行共享信道PSSCH与PSFCH的映射关系确定,或者,
所述第一PSFCH可以为所述第一终端设备指示的。Optionally, the first PSFCH may be determined based on the mapping relationship between the physical sidelink shared channel PSSCH and the PSFCH, or, The first PSFCH may be indicated by the first terminal equipment.
在一种可选的实施方式中,所述处理单元602在根据所述第二CAPC针对第一PSFCH进行LBT时,可以用于:根据所述第二CAPC确定第三CAPC;根据所述第三CAPC针对所述第一PSFCH进行LBT。In an optional implementation, when performing LBT on the first PSFCH according to the second CAPC, the processing unit 602 may be configured to: determine a third CAPC according to the second CAPC; CAPC performs LBT on the first PSFCH.
示例性的,所述处理单元602在根据所述第二CAPC确定所述第三CAPC时,可以用于:确定所述第二CAPC小于或者等于第一阈值时,确定所述第三CAPC;或者,确定所述第二CAPC大于所述第一阈值时,确定所述第三CAPC。Exemplarily, when determining the third CAPC according to the second CAPC, the processing unit 602 may be configured to: determine the third CAPC when determining that the second CAPC is less than or equal to a first threshold; or , when it is determined that the second CAPC is greater than the first threshold, the third CAPC is determined.
在一种可能的方式中,所述处理单元602还可以用于:根据所述第二CAPC确定第四CAPC;根据所述第四CAPC针对第二PSFCH进行LBT。In a possible manner, the processing unit 602 may also be configured to: determine a fourth CAPC according to the second CAPC; and perform LBT for the second PSFCH according to the fourth CAPC.
可选的,所述处理单元602在根据所述第二CAPC确定第四CAPC时,可以用于:将所述第二CAPC减去M,得到所述第四CAPC,所述M为大于或者等于1的整数。Optionally, when determining the fourth CAPC based on the second CAPC, the processing unit 602 may be used to: subtract M from the second CAPC to obtain the fourth CAPC, where M is greater than or equal to an integer of 1.
作为一种可能的示例,所述收发单元601还可以用于接收到第二信息,所述第二信息用于指示基于所述第二CAPC确定所述第四CAPC,并根据所述第四CAPC针对所述第二PSFCH进行LBT。As a possible example, the transceiver unit 601 may also be configured to receive second information, the second information being used to indicate that the fourth CAPC is determined based on the second CAPC, and the fourth CAPC is determined based on the fourth CAPC. LBT is performed on the second PSFCH.
在又一个实施例中,所述通信装置600用于实现上述图5所示的实施例中第二终端设备的功能时,所述收发单元601可以用于从第一终端设备接收侧行链路控制信息SCI;所述处理单元602可以用于确定所述SCI未指示信道接入优先级类型CAPC时,根据预定义的CAPC针对第一物理侧行链路反馈信道PSFCH进行先听后说LBT。In another embodiment, when the communication device 600 is used to implement the functions of the second terminal device in the embodiment shown in Figure 5, the transceiver unit 601 can be used to receive a side link from the first terminal device. Control information SCI; the processing unit 602 may be configured to perform listen-before-talk LBT based on the predefined CAPC for the first physical sidelink feedback channel PSFCH when it is determined that the SCI does not indicate the channel access priority type CAPC.
可选的,所述第一PSFCH可以为所述第二终端设备确定的。Optionally, the first PSFCH may be determined by the second terminal equipment.
在一种可能的示例中,所述处理单元602还可以用于:根据所述预定义的CAPC确定第五CAPC;根据所述第五CAPC针对第二PSFCH进行LBT。In a possible example, the processing unit 602 may be further configured to: determine a fifth CAPC according to the predefined CAPC; and perform LBT for the second PSFCH according to the fifth CAPC.
示例性的,所述处理单元602在根据所述预定义的CAPC确定第五CAPC时,可以用于:将所述预定义的CAPC减去S,得到所述第五CAPC,所述S为大于或者等于1的整数。Exemplarily, when determining the fifth CAPC according to the predefined CAPC, the processing unit 602 may be used to: subtract S from the predefined CAPC to obtain the fifth CAPC, where S is greater than Or an integer equal to 1.
作为一种可能的示例,所述收发单元601还可以用于接收到第三信息,所述第三信息可以用于指示基于所述预定义的CAPC确定所述第五CAPC,并根据所述第五CAPC针对所述第二PSFCH进行LBT。As a possible example, the transceiver unit 601 may also be configured to receive third information, and the third information may be used to indicate that the fifth CAPC is determined based on the predefined CAPC, and the fifth CAPC is determined based on the predefined CAPC. Five CAPCs perform LBT on the second PSFCH.
需要说明的是,本申请实施例中对单元的划分是示意性的,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。在本申请的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。上述集成的单元既可以采用硬件的形式实现,也可以采用软件功能单元的形式实现。It should be noted that the division of units in the embodiment of the present application is schematic and is only a logical function division. In actual implementation, there may be other division methods. Each functional unit in the embodiment of the present application can be integrated into one processing unit, or each unit can exist physically alone, or two or more units can be integrated into one unit. The above integrated units can be implemented in the form of hardware or software functional units.
所述集成的单元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。基于这样的理解,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全部或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)或处理器(processor)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。If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it may be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application is essentially or contributes to the existing technology, or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium , including several instructions to cause a computer device (which can be a personal computer, a server, or a network device, etc.) or a processor to execute all or part of the steps of the methods described in various embodiments of the application. The aforementioned storage media include: U disk, mobile hard disk, read-only memory (ROM), random access memory (RAM), magnetic disk or optical disk and other media that can store program code. .
基于以上实施例,本申请实施例还提供了一种通信装置,参阅图7所示,通信装置700可以包括收发器701和处理器702。可选地,所述通信装置700中还可以包括存储器703。其中,所述存储器703可以设置于所述通信装置700内部,还可以设置于所述通信装置700外部。其中,所述处理器702可以控制所述收发器701接收和发送报文、信息、消息或数据等。Based on the above embodiments, embodiments of the present application also provide a communication device. Referring to FIG. 7 , the communication device 700 may include a transceiver 701 and a processor 702 . Optionally, the communication device 700 may also include a memory 703. The memory 703 may be disposed inside the communication device 700 or may be disposed outside the communication device 700 . Among them, the processor 702 can control the transceiver 701 to receive and send messages, information, messages or data, etc.
具体地,所述处理器702可以是中央处理器(central processing unit,CPU),网络处理器(network processor,NP)或者CPU和NP的组合。所述处理器702还可以进一步包括硬件芯片。上述硬件芯片可以是专用集成电路(application-specific integrated circuit,ASIC),可编程逻辑器件(programmable logic device,PLD)或其组合。上述PLD可以是复杂可编程逻辑器件(complex programmable logic device,CPLD),现场可编程逻辑门阵列(field-programmable gate array,FPGA),通用阵列逻辑(generic array logic,GAL)或其任意组合。Specifically, the processor 702 may be a central processing unit (CPU), a network processor (NP) or a combination of CPU and NP. The processor 702 may further include a hardware chip. The above-mentioned hardware chip can be an application-specific integrated circuit (ASIC), a programmable logic device (PLD) or a combination thereof. The above-mentioned PLD can be a complex programmable logic device (CPLD), a field-programmable gate array (FPGA), a general array logic (GAL) or any combination thereof.
其中,所述收发器701、所述处理器702和所述存储器703之间相互连接。可选地,所述收发器701、所述处理器702和所述存储器703通过总线704相互连接;所述总线704可以是外设部件互连标准(Peripheral Component Interconnect,PCI)总线或扩展工业标准结构(Extended Industry Standard
Architecture,EISA)总线等。所述总线可以分为地址总线、数据总线、控制总线等。为便于表示,图7中仅用一条粗线表示,但并不表示仅有一根总线或一种类型的总线。The transceiver 701, the processor 702 and the memory 703 are connected to each other. Optionally, the transceiver 701, the processor 702 and the memory 703 are connected to each other through a bus 704; the bus 704 may be a Peripheral Component Interconnect (PCI) bus or an extended industry standard Structure(Extended Industry Standard Architecture, EISA) bus, etc. The bus can be divided into address bus, data bus, control bus, etc. For ease of presentation, only one thick line is used in Figure 7, but it does not mean that there is only one bus or one type of bus.
在一种可选地实施方式中,所述存储器703,用于存放程序等。具体地,程序可以包括程序代码,该程序代码包括计算机操作指令。所述存储器703可能包括RAM,也可能还包括非易失性存储器(non-volatile memory),例如一个或多个磁盘存储器。所述处理器702执行所述存储器703所存放的应用程序,实现上述功能,从而实现通信装置700的功能。In an optional implementation, the memory 703 is used to store programs, etc. Specifically, the program may include program code including computer operating instructions. The memory 703 may include RAM, and may also include non-volatile memory (non-volatile memory), such as one or more disk memories. The processor 702 executes the application program stored in the memory 703 to implement the above functions, thereby realizing the functions of the communication device 700 .
示例性地,该通信装置700可以是上述实施例中的第一终端设备;还可以是上述实施例中的第二终端设备。For example, the communication device 700 may be the first terminal device in the above embodiment; it may also be the second terminal device in the above embodiment.
在一个实施例中,所述通信装置700在实现上述图4所示的实施例中第一终端设备的功能时,收发器701可以实现上述实施例中的由第一终端设备执行的收发操作;处理器702可以实现上述实施例中由第一终端设备执行的除收发操作以外的其他操作。具体的相关具体描述可以参见上述图4所示的实施例中的相关描述,此处不再详细介绍。In one embodiment, when the communication device 700 implements the functions of the first terminal device in the embodiment shown in Figure 4, the transceiver 701 can implement the sending and receiving operations performed by the first terminal device in the above embodiment; The processor 702 can implement other operations other than the sending and receiving operations performed by the first terminal device in the above embodiments. For specific relevant descriptions, please refer to the relevant descriptions in the embodiment shown in FIG. 4 , and will not be introduced in detail here.
在另一个实施例中,所述通信装置700在实现上述图4所示的实施例中第二终端设备的功能时,收发器701可以实现上述实施例中的由第二终端设备执行的收发操作;处理器702可以实现上述实施例中由第二终端设备执行的除收发操作以外的其他操作。具体的相关具体描述可以参见上述图4所示的实施例中的相关描述,此处不再详细介绍。In another embodiment, when the communication device 700 implements the functions of the second terminal device in the embodiment shown in FIG. 4, the transceiver 701 can implement the sending and receiving operations performed by the second terminal device in the above embodiment. ; The processor 702 may implement other operations other than the sending and receiving operations performed by the second terminal device in the above embodiment. For specific relevant descriptions, please refer to the relevant descriptions in the embodiment shown in FIG. 4 , and will not be introduced in detail here.
在另一个实施例中,所述通信装置700在实现上述图5所示的实施例中第二终端设备的功能时,收发器701可以实现上述实施例中的由第二终端设备执行的收发操作;处理器702可以实现上述实施例中由第二终端设备执行的除收发操作以外的其他操作。具体的相关具体描述可以参见上述图5所示的实施例中的相关描述,此处不再详细介绍。In another embodiment, when the communication device 700 implements the functions of the second terminal device in the embodiment shown in FIG. 5, the transceiver 701 can implement the sending and receiving operations performed by the second terminal device in the above embodiment. ; The processor 702 may implement other operations other than the sending and receiving operations performed by the second terminal device in the above embodiment. For specific relevant descriptions, please refer to the relevant descriptions in the embodiment shown in FIG. 5 , and will not be introduced in detail here.
基于以上实施例,本申请实施例提供了一种通信系统,该通信系统可以包括上述实施例涉及的第一终端设备和第二终端设备等。Based on the above embodiments, embodiments of the present application provide a communication system, which may include the first terminal device and the second terminal device involved in the above embodiments.
本申请实施例还提供一种计算机可读存储介质,所述计算机可读存储介质用于存储计算机程序,该计算机程序被计算机执行时,所述计算机可以实现上述图4或图5所示的实施例提供的方法。Embodiments of the present application also provide a computer-readable storage medium. The computer-readable storage medium is used to store a computer program. When the computer program is executed by a computer, the computer can implement the implementation shown in Figure 4 or Figure 5. Example method provided.
本申请实施例还提供一种计算机程序产品,所述计算机程序产品用于存储计算机程序,该计算机程序被计算机执行时,所述计算机可以实现上述图4或图5所示的实施例提供的方法。An embodiment of the present application also provides a computer program product. The computer program product is used to store a computer program. When the computer program is executed by a computer, the computer can implement the method provided by the embodiment shown in Figure 4 or Figure 5. .
本申请实施例还提供一种芯片,包括处理器,所述处理器与存储器耦合,用于调用所述存储器中的程序使得所述芯片实现上述图4或图5所示的实施例提供的方法。An embodiment of the present application also provides a chip, including a processor, which is coupled to a memory and configured to call a program in the memory so that the chip implements the method provided by the embodiment shown in Figure 4 or Figure 5. .
本申请实施例还提供一种芯片,所述芯片与存储器耦合,所述芯片用于实现上述图4或图5所示的实施例提供的方法。An embodiment of the present application also provides a chip, the chip is coupled to a memory, and the chip is used to implement the method provided by the embodiment shown in FIG. 4 or FIG. 5 .
本领域内的技术人员应明白,本申请的实施例可提供为方法、系统、或计算机程序产品。因此,本申请可采用完全硬件实施例、完全软件实施例、或结合软件和硬件方面的实施例的形式。而且,本申请可采用在一个或多个其中包含有计算机可用程序代码的计算机可用存储介质(包括但不限于磁盘存储器、CD-ROM、光学存储器等)上实施的计算机程序产品的形式。Those skilled in the art will understand that embodiments of the present application may be provided as methods, systems, or computer program products. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment that combines software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) having computer-usable program code embodied therein.
本申请是参照根据本申请的方法、设备(系统)、和计算机程序产品的流程图和/或方框图来描述的。应理解可由计算机程序指令实现流程图和/或方框图中的每一流程和/或方框、以及流程图和/或方框图中的流程和/或方框的结合。可提供这些计算机程序指令到通用计算机、专用计算机、嵌入式处理机或其他可编程数据处理设备的处理器以产生一个机器,使得通过计算机或其他可编程数据处理设备的处理器执行的指令产生用于实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的装置。The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to the present application. It will be understood that each process and/or block in the flowchart illustrations and/or block diagrams, and combinations of processes and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing device to produce a machine, such that the instructions executed by the processor of the computer or other programmable data processing device produce a use A device for realizing the functions specified in one process or multiple processes of the flowchart and/or one block or multiple blocks of the block diagram.
这些计算机程序指令也可存储在能引导计算机或其他可编程数据处理设备以特定方式工作的计算机可读存储器中,使得存储在该计算机可读存储器中的指令产生包括指令装置的制造品,该指令装置实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能。These computer program instructions may also be stored in a computer-readable memory that causes a computer or other programmable data processing apparatus to operate in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including the instruction means, the instructions The device implements the functions specified in a process or processes of the flowchart and/or a block or blocks of the block diagram.
这些计算机程序指令也可装载到计算机或其他可编程数据处理设备上,使得在计算机或其他可编程设备上执行一系列操作步骤以产生计算机实现的处理,从而在计算机或其他可编程设备上执行的指令提供用于实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的步骤。These computer program instructions may also be loaded onto a computer or other programmable data processing device, causing a series of operating steps to be performed on the computer or other programmable device to produce computer-implemented processing, thereby executing on the computer or other programmable device. Instructions provide steps for implementing the functions specified in a process or processes of a flowchart diagram and/or a block or blocks of a block diagram.
显然,本领域的技术人员可以对本申请进行各种改动和变型而不脱离本申请的范围。这样,倘若本申请的这些修改和变型属于本申请权利要求及其等同技术的范围之内,则本申请也意图包含这些改动和
变型在内。
Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the scope of the present application. In this way, if these modifications and variations of the present application fall within the scope of the claims of the present application and its equivalent technology, the present application is also intended to include these modifications and variations. Variations included.
Claims (31)
- 一种通信方法,其特征在于,包括:A communication method, characterized by including:第一终端设备确定第一信道接入优先级类型CAPC;The first terminal device determines the first channel access priority type CAPC;所述第一终端设备向第二终端设备发送第一信息,所述第一信息用于指示第二CAPC,所述第二CAPC与所述第一CAPC相同,或者所述第二CAPC基于所述第一CAPC确定;所述第二CAPC用于所述第二终端设备针对第一物理侧行链路反馈信道PSFCH进行先听后说LBT。The first terminal device sends first information to the second terminal device, the first information is used to indicate a second CAPC, the second CAPC is the same as the first CAPC, or the second CAPC is based on the The first CAPC is determined; the second CAPC is used for the second terminal equipment to perform listen-before-talk LBT for the first physical sidelink feedback channel PSFCH.
- 如权利要求1所述的方法,其特征在于,所述第一终端设备确定所述第一CAPC,包括:The method of claim 1, wherein the first terminal device determines the first CAPC, including:所述第一终端设备从网络设备接收第一下行控制信息DCI,所述第一DCI用于调度侧行链路SL资源,所述第一DCI指示所述第一CAPC。The first terminal device receives first downlink control information DCI from a network device, the first DCI is used to schedule sidelink SL resources, and the first DCI indicates the first CAPC.
- 如权利要求1所述的方法,其特征在于,所述第一终端设备确定所述第一CAPC,包括:The method of claim 1, wherein the first terminal device determines the first CAPC, including:所述第一终端设备根据第一预设规则和第一传输块TB确定所述第一CAPC。The first terminal device determines the first CAPC according to a first preset rule and a first transmission block TB.
- 如权利要求3所述的方法,其特征在于,所述第一终端设备根据所述第一预设规则和所述第一TB确定所述第一CAPC,包括:The method of claim 3, wherein the first terminal device determines the first CAPC according to the first preset rule and the first TB, including:当所述第一TB中包括至少一个媒体接入控制控制元素MAC CE时,所述第一终端设备确定所述第一CAPC为所述至少一个MAC CE对应的CAPC中优先级最高的CAPC;When the first TB includes at least one media access control control element MAC CE, the first terminal device determines that the first CAPC is the CAPC with the highest priority among the CAPCs corresponding to the at least one MAC CE;当所述第一TB中未包括所述至少一个MAC CE,且包括至少一个侧行链路控制信道业务数据单元SCCH SDU时,所述第一终端设备确定所述第一CAPC为所述至少一个SCCH SDU对应的CAPC中优先级最高的CAPC;When the first TB does not include the at least one MAC CE and includes at least one sidelink control channel service data unit SCCH SDU, the first terminal device determines that the first CAPC is the at least one The CAPC with the highest priority among the CAPCs corresponding to SCCH SDU;当所述第一TB中未包括所述至少一个MAC CE和所述至少一个SCCH SDU,且包括至少一个侧行链路业务信道业务数据单元STCH SDU时,所述第一终端设备确定所述第一CAPC为所述至少一个STCH SDU对应的CAPC中优先级最低的CAPC。When the first TB does not include the at least one MAC CE and the at least one SCCH SDU, and includes at least one sidelink service channel service data unit STCH SDU, the first terminal device determines that the first One CAPC is the CAPC with the lowest priority among the CAPCs corresponding to the at least one STCH SDU.
- 如权利要求3所述的方法,其特征在于,所述第一终端设备根据所述第一预设规则和所述第一TB确定所述第一CAPC,包括:The method of claim 3, wherein the first terminal device determines the first CAPC according to the first preset rule and the first TB, including:所述第一终端设备确定所述第一CAPC为所述第一TB中包含的至少一个逻辑信道LCH和/或至少一个媒体接入控制控制元素MAC CE对应的CAPC中优先级最高的CAPC。The first terminal device determines that the first CAPC is the CAPC with the highest priority among CAPCs corresponding to at least one logical channel LCH and/or at least one media access control element MAC CE included in the first TB.
- 如权利要求1所述的方法,其特征在于,所述第一终端设备确定所述第一CAPC,包括:The method of claim 1, wherein the first terminal device determines the first CAPC, including:所述第一终端设备确定第一逻辑信道LCH或第一媒体接入控制控制元素MAC CE对应的CAPC为所述第一CAPC,所述第一LCH或所述第一MAC CE用于触发所述第一终端设备选择或重选SL资源,所述第一LCH或所述第一MAC CE与所述CAPC存在对应关系。The first terminal device determines that the CAPC corresponding to the first logical channel LCH or the first media access control control element MAC CE is the first CAPC, and the first LCH or the first MAC CE is used to trigger the The first terminal equipment selects or reselects SL resources, and there is a corresponding relationship between the first LCH or the first MAC CE and the CAPC.
- 如权利要求1-6任一项所述的方法,其特征在于,所述第一信息包括第一指示信息,所述第一指示信息用于指示所述第二CAPC用于PSFCH传输。The method according to any one of claims 1 to 6, characterized in that the first information includes first indication information, and the first indication information is used to instruct the second CAPC to be used for PSFCH transmission.
- 如权利要求1-6任一项所述的方法,其特征在于,所述第一信息的格式为第一格式,所述第一格式用于指示所述第二CAPC用于PSFCH传输。The method according to any one of claims 1 to 6, characterized in that the format of the first information is a first format, and the first format is used to indicate that the second CAPC is used for PSFCH transmission.
- 一种通信方法,其特征在于,包括:A communication method, characterized by including:第二终端设备从第一终端设备接收第一信息,所述第一信息用于指示第二信道接入优先级类型CAPC;The second terminal device receives first information from the first terminal device, the first information being used to indicate the second channel access priority type CAPC;所述第二终端设备根据所述第二CAPC针对第一物理侧行链路反馈信道PSFCH进行先听后说LBT。The second terminal device performs listen-before-talk LBT for the first physical sidelink feedback channel PSFCH according to the second CAPC.
- 如权利要求9所述的方法,其特征在于,所述第一信息包括第一指示信息,所述第一指示信息用于指示所述第二CAPC用于PSFCH传输。The method of claim 9, wherein the first information includes first indication information, and the first indication information is used to instruct the second CAPC to be used for PSFCH transmission.
- 如权利要求9所述的方法,其特征在于,所述第一信息的格式为第一格式,所述第一格式用于指示所述第二CAPC用于PSFCH传输。The method of claim 9, wherein the format of the first information is a first format, and the first format is used to indicate that the second CAPC is used for PSFCH transmission.
- 如权利要求9-11任一项所述的方法,其特征在于,所述第一PSFCH基于物理侧行共享信道PSSCH与PSFCH的映射关系确定,或者,所述第一PSFCH为所述第一终端设备指示的。The method according to any one of claims 9 to 11, characterized in that the first PSFCH is determined based on the mapping relationship between the physical sidelink shared channel PSSCH and the PSFCH, or the first PSFCH is the first terminal as indicated by the device.
- 如权利要求9-12任一项所述的方法,其特征在于,所述第二终端设备根据所述第二CAPC针对第一PSFCH进行LBT,包括:The method according to any one of claims 9-12, wherein the second terminal device performs LBT for the first PSFCH according to the second CAPC, including:所述第二终端设备根据所述第二CAPC确定第三CAPC; The second terminal device determines a third CAPC based on the second CAPC;所述第二终端设备根据所述第三CAPC针对所述第一PSFCH进行LBT。The second terminal equipment performs LBT on the first PSFCH according to the third CAPC.
- 如权利要求13所述的方法,其特征在于,所述第二终端设备根据所述第二CAPC确定所述第三CAPC,包括:The method of claim 13, wherein the second terminal device determines the third CAPC based on the second CAPC, including:所述第二终端设备确定所述第二CAPC小于或者等于第一阈值时,所述第二终端设备确定所述第三CAPC;或者When the second terminal device determines that the second CAPC is less than or equal to the first threshold, the second terminal device determines the third CAPC; or所述第二终端设备确定所述第二CAPC大于所述第一阈值时,所述第二终端设备确定所述第三CAPC。When the second terminal device determines that the second CAPC is greater than the first threshold, the second terminal device determines the third CAPC.
- 如权利要求9-14任一项所述的方法,其特征在于,所述方法还包括:The method according to any one of claims 9-14, characterized in that the method further includes:所述第二终端设备根据所述第二CAPC确定第四CAPC;The second terminal device determines a fourth CAPC based on the second CAPC;所述第二终端设备根据所述第四CAPC针对第二PSFCH进行LBT。The second terminal equipment performs LBT on the second PSFCH according to the fourth CAPC.
- 如权利要求15所述的方法,其特征在于,所述第二终端设备根据所述第二CAPC确定第四CAPC,包括:The method of claim 15, wherein the second terminal device determines a fourth CAPC based on the second CAPC, including:所述第二终端设备将所述第二CAPC减去M,得到所述第四CAPC,所述M为大于或者等于1的整数。The second terminal device subtracts M from the second CAPC to obtain the fourth CAPC, where M is an integer greater than or equal to 1.
- 如权利要求15或16所述的方法,其特征在于,所述方法还包括:The method according to claim 15 or 16, characterized in that the method further includes:所述第二终端设备接收到第二信息,所述第二信息用于指示基于所述第二CAPC确定所述第四CAPC,并根据所述第四CAPC针对所述第二PSFCH进行LBT。The second terminal device receives second information, and the second information is used to indicate determining the fourth CAPC based on the second CAPC, and performing LBT for the second PSFCH according to the fourth CAPC.
- 一种通信方法,其特征在于,包括:A communication method, characterized by including:第二终端设备从第一终端设备接收侧行链路控制信息SCI;The second terminal device receives the side link control information SCI from the first terminal device;所述第二终端设备确定所述SCI未指示信道接入优先级类型CAPC时,根据预定义的CAPC针对第一物理侧行链路反馈信道PSFCH进行先听后说LBT。When the second terminal device determines that the SCI does not indicate the channel access priority type CAPC, it performs listen-before-talk LBT for the first physical sidelink feedback channel PSFCH according to the predefined CAPC.
- 如权利要求18所述的方法,其特征在于,所述第一PSFCH为所述第二终端设备确定的。The method of claim 18, wherein the first PSFCH is determined by the second terminal equipment.
- 如权利要求18或19所述的方法,其特征在于,所述方法还包括:The method according to claim 18 or 19, characterized in that the method further includes:所述第二终端设备根据所述预定义的CAPC确定第五CAPC;The second terminal device determines a fifth CAPC based on the predefined CAPC;所述第二终端设备根据所述第五CAPC针对第二PSFCH进行LBT。The second terminal equipment performs LBT on the second PSFCH according to the fifth CAPC.
- 如权利要求20所述的方法,其特征在于,所述第二终端设备根据所述预定义的CAPC确定第五CAPC,包括:The method of claim 20, wherein the second terminal device determines the fifth CAPC according to the predefined CAPC, including:所述第二终端设备将所述预定义的CAPC减去S,得到所述第五CAPC,所述S为大于或者等于1的整数。The second terminal device subtracts S from the predefined CAPC to obtain the fifth CAPC, where S is an integer greater than or equal to 1.
- 如权利要求20或21所述的方法,其特征在于,所述方法还包括:The method according to claim 20 or 21, characterized in that the method further includes:所述第二终端设备接收到第三信息,所述第三信息用于指示基于所述预定义的CAPC确定所述第五CAPC,并根据所述第五CAPC针对所述第二PSFCH进行LBT。The second terminal device receives third information, and the third information is used to indicate determining the fifth CAPC based on the predefined CAPC, and performing LBT for the second PSFCH according to the fifth CAPC.
- 一种通信装置,其特征在于,包括用于执行如权利要求1-8任一项所述的方法的模块或单元。A communication device, characterized by comprising a module or unit for executing the method according to any one of claims 1-8.
- 一种通信装置,其特征在于,包括用于执行如权利要求9-17任一项所述的方法的模块或单元。A communication device, characterized by comprising a module or unit for executing the method according to any one of claims 9-17.
- 一种通信装置,其特征在于,包括用于执行如权利要求18-22任一项所述的方法的模块或单元。A communication device, characterized by comprising a module or unit for executing the method according to any one of claims 18-22.
- 一种通信装置,其特征在于,存储器、处理器和收发器,其中:A communication device characterized by a memory, a processor and a transceiver, wherein:所述收发器,用于所述通信装置进行通信;The transceiver is used for communication by the communication device;所述存储器,用于存储计算机指令;The memory is used to store computer instructions;所述处理器,用于调用所述存储器中的计算机指令,以通过所述收发器执行如权利要求1-8任一项所述的方法。The processor is configured to call computer instructions in the memory to execute the method according to any one of claims 1-8 through the transceiver.
- 一种通信装置,其特征在于,存储器、处理器和收发器,其中:A communication device characterized by a memory, a processor and a transceiver, wherein:所述收发器,用于所述通信装置进行通信;The transceiver is used for communication by the communication device;所述存储器,用于存储计算机指令;The memory is used to store computer instructions;所述处理器,用于调用所述存储器中的计算机指令,以通过所述收发器执行如权利要求9-17任一项所述的方法。The processor is configured to call computer instructions in the memory to execute the method according to any one of claims 9-17 through the transceiver.
- 一种通信装置,其特征在于,存储器、处理器和收发器,其中:A communication device characterized by a memory, a processor and a transceiver, wherein:所述收发器,用于所述通信装置进行通信;The transceiver is used for communication by the communication device;所述存储器,用于存储计算机指令; The memory is used to store computer instructions;所述处理器,用于调用所述存储器中的计算机指令,以通过所述收发器执行如权利要求18-22任一项所述的方法。The processor is configured to call computer instructions in the memory to execute the method according to any one of claims 18-22 through the transceiver.
- 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中存储有计算机可执行指令,所述计算机可执行指令在被所述计算机调用时以执行如权利要求1-8中任一项所述的方法,或者执行如权利要求9-17中任一项所述的方法,或者执行如权利要求18-22中任一项所述的方法。A computer-readable storage medium, characterized in that computer-executable instructions are stored in the computer-readable storage medium, and when called by the computer, the computer-executable instructions execute any of claims 1-8. The method described in any one of the above, or the method described in any one of claims 9-17, or the method described in any one of claims 18-22.
- 一种计算机程序产品,其特征在于,包含指令,当所述指令在计算机上运行时,使得如权利要求1-8中任一项所述的方法被执行,或者使得如权利要求9-17中任一项所述的方法被执行,或者使得如权利要求18-22中任一项所述的方法被执行。A computer program product, characterized in that it contains instructions that, when run on a computer, cause the method of any one of claims 1-8 to be executed, or cause the method of claims 9-17 to be performed The method of any one of claims 18-22 is performed, or the method of any one of claims 18-22 is performed.
- 一种芯片,其特征在于,所述芯片与存储器耦合,用于读取并执行所述存储器中存储的程序指令,以实现如权利要求1-8中任一项所述的方法,或者实现如权利要求9-17中任一项所述的方法,或者实现如权利要求18-22中任一项所述的方法。 A chip, characterized in that the chip is coupled to a memory and is used to read and execute program instructions stored in the memory to implement the method as described in any one of claims 1-8, or to implement as The method of any one of claims 9-17, or the method of any one of claims 18-22.
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