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WO2022141608A1 - Procédé de communication et appareil de communication - Google Patents

Procédé de communication et appareil de communication Download PDF

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Publication number
WO2022141608A1
WO2022141608A1 PCT/CN2020/142601 CN2020142601W WO2022141608A1 WO 2022141608 A1 WO2022141608 A1 WO 2022141608A1 CN 2020142601 W CN2020142601 W CN 2020142601W WO 2022141608 A1 WO2022141608 A1 WO 2022141608A1
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WO
WIPO (PCT)
Prior art keywords
resource
information
terminal
sideline
send
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2020/142601
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English (en)
Chinese (zh)
Inventor
郭文婷
苏宏家
董蕾
卢磊
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Huawei Technologies Co Ltd filed Critical Huawei Technologies Co Ltd
Priority to PCT/CN2020/142601 priority Critical patent/WO2022141608A1/fr
Publication of WO2022141608A1 publication Critical patent/WO2022141608A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/50—Allocation or scheduling criteria for wireless resources
    • H04W72/56—Allocation or scheduling criteria for wireless resources based on priority criteria

Definitions

  • the present application relates to the field of communication technologies, and in particular, to a communication method and a communication device.
  • V2X communication means that the vehicle can communicate with external devices.
  • LTE long term evolution
  • 3GPP 3rd generation partnership project
  • V2X communication means that the vehicle can communicate with external devices.
  • the communication between vehicles and vehicles, vehicles and roadside units, vehicles and pedestrians enables vehicles to better obtain real-time road conditions, road information, pedestrian information and other traffic communications.
  • Communication between terminal devices involved in a V2X system is widely referred to as sidelink (SL) communication.
  • V2X communication can support communication scenarios with and without network coverage.
  • the SL communication resource configuration mode may be based on the unified scheduling mode of the access device and the mode of autonomous selection by the terminal device.
  • a terminal device in a scenario without network coverage, can select resources based on the result of its own listening through an autonomous selection mode.
  • each terminal device needs to receive the The SL signal is decoded for each possible PSSCH and PSCCH, resulting in a waste of resources.
  • the terminal device is a power consumption sensitive terminal device, such as the terminal device is inconvenient to charge, or the battery capacity is relatively small, if the terminal device still needs to select resources based on listening, the required power consumption is large, and it is difficult to guarantee.
  • the service continuity of the terminal device is in urgent need of a solution.
  • the present application provides a communication method and a communication device, so that resources can be shared among different terminals in a cooperative manner, so as to ensure the reliability of terminal resource selection.
  • an embodiment of the present application provides a communication method, the method includes: a first terminal determines a first resource, where the first resource is a resource reserved by the first terminal for sending sideline information; the The first terminal sends first information for indicating a second resource to the second terminal, the second resource is used for the second terminal to send sideline information, and the second resource is a subset of the first resource.
  • the second terminal can use the pre-configured information of the first terminal.
  • the second terminal is inconvenient to select resources (for example, the second terminal is a power-sensitive terminal device) or the second terminal does not have the resource selection capability, with the assistance of the first terminal, the second terminal does not
  • the resource selection can also obtain resources for sending sideline information, which not only ensures the reliability of the resources of the second terminal, but also ensures the continuity of the services of the second terminal.
  • the above-mentioned first resource includes a first reserved resource and/or a second reserved resource
  • the first reserved resource is a resource determined through resource reservation method 1, that is, a periodically reserved resource
  • the second reserved resource is the resource determined by resource reservation method 2, that is, the value indicated by the value of time domain resource allocation (time resource indicator value, TRIV) and the value of frequency domain resource allocation (frequency resource indicator value, FRIV) Reserving resources
  • the reserved resources refer to time-frequency reserved resources determined in advance for the data to be sent.
  • the first information is used to indicate the location of the first resource and the location of the second resource in the first resource.
  • the first terminal determines the location of the first resource and the location of the second resource in the first resource, and then indicates to the second terminal the location of the first resource and the location of the second resource to the second terminal through the first information.
  • the location in the first resource the second terminal can determine the location of the second resource that the second terminal can use to send the sideline information through the first information, and send the sideline information of the second terminal on the second resource reserved by the first terminal , through the communication method, the second terminal can obtain resources capable of sending sideline information without performing resource selection, thereby ensuring the reliability of the resources of the second terminal.
  • the second resource is determined according to the second information; the method further includes: the first terminal obtains the The second terminal receives second information, where the second information is used to request resources for the second terminal to send sideline information.
  • the second terminal sends the second information to the first terminal, and requests the first terminal for resources for sending sideline information. After the first terminal receives the second information, the second information The first terminal is triggered to send the first information for the second terminal to determine the second resource to the second terminal.
  • the second information includes resource request information of the second terminal, and the resource request information is used to trigger the first terminal to determine the first resource.
  • the resource request information is a service request. , SR).
  • the second information includes the amount of data to be sent on the sidelink of the second terminal;
  • the second resource is determined according to the amount of data to be sent on the sidelink of the second terminal.
  • the second terminal sends the second information to the first terminal, and requests the first terminal for resources for sending sideline information. After receiving the second information, the first terminal The content determines the second resource, and then sends the first information for indicating the second resource to the second terminal.
  • the second information includes resource requirement information of the second terminal, such as the size of physical resources specifically required by the second terminal, or the number of bits of data to be sent by the second terminal, etc.
  • the resource requirement information is used for The time-frequency location of the first resource is determined by the first terminal, as an example and not a limitation, and the resource request information is a buffer state report (buffer state report, BSR).
  • the second resource is determined according to the size of the resource used to carry third information, where the third information is resource request information and / or buffer status report.
  • the second resource is determined according to third information
  • the third information is a service request (service requirement, SR) or a buffer state report (buffer state report, BSR)
  • the second resource determined according to the third information is The preset resource requirement negotiated after the first terminal and the second terminal establish a sidelink connection, where the preset resource requirement includes the size of the periodic resource for the second terminal to send the sidelink data.
  • the second resource is determined according to the number of bits of the resource request information and/or the buffer status report, or according to the size of the resource for sending the resource request information and/or the buffer status report.
  • the preset resource requirement may be that the first terminal sends indication information to the second terminal with a period of P ms, where P is a positive integer, and the indication information is used to indicate the size and location of physical resources, and the physical The size of the resource is the default size negotiated by the two parties.
  • the first information includes a message used to instruct the second terminal to use the second resource to send a sideline Information indicating information.
  • the first terminal sends indication information to the second terminal, where the indication information is used to instruct the second terminal to use the second resource to send sideline information of the second terminal, where the sideline information includes control information And/or data, for example, the service request (service requirement, SR) of the second terminal, the buffer state report (buffer state report, BSR), the data to be sent on the second terminal, etc.
  • the second terminal can use the above-mentioned second terminal.
  • the resource sends sideline information to the first terminal, and the second resource may also be used to send sideline information to other terminals, which is not limited in this application.
  • the indication information is carried in the field of the first-level control information, and the first control information is a physical sidelink control channel (physical sidelink control channel). channel, control information carried by PSCCH).
  • first control information is a physical sidelink control channel (physical sidelink control channel). channel, control information carried by PSCCH).
  • the first information includes shared allocation information, and the shared allocation information is used to determine the second resource at the location of the first resource.
  • the shared allocation information is only used as an exemplary name, and the indication information having the same function or containing the same content may also have other names, which is not limited in this application.
  • the first terminal sends the shared allocation information to the second terminal, where the shared allocation information is used to indicate the specific usage allocation of the reserved resources of the first terminal between the first terminal and the second terminal, That is, the specific use allocation of the first resource between the first terminal and the second terminal, the second terminal can determine the second resource from the first resource according to the allocation information of the shared resource, and the second terminal can use the second resource on the second resource.
  • Send sideline information is used to indicate the specific usage allocation of the reserved resources of the first terminal between the first terminal and the second terminal.
  • the shared allocation information indicates the resources in the first resource for the first terminal to send the sidelink information to the second terminal, and the resources in the first resource for the second terminal to send the sidelink information, that is The second resource, the second terminal receives the sidelink information sent by the first terminal on the resource where the first terminal sends the sidelink information to the second terminal in the first resource, and sends the sidelink information sent by the first terminal to the first terminal and/or the second terminal on the second resource. Terminals other than one terminal send sideline information.
  • the specific location of the sending and receiving resources of the second terminal in the time-frequency domain can be determined by the first terminal, so that the second terminal can save unnecessary monitoring energy consumption.
  • the second terminal since the second terminal has only one communication peer, the second terminal can only The reception is performed on the time slot corresponding to the second resource, thereby reducing the energy consumption of blind reception and realizing energy saving.
  • the first terminal sends the sharing allocation information related to the first resource to the second terminal to instruct the second terminal
  • the second terminal only needs to send or receive information at the location indicated by the first information, and the radio frequency module can be turned off at other times, thereby realizing energy saving.
  • the resources for information exchange between the first terminal and the second terminal may be indicated in a sidelink control information (SCI), which reduces the overhead of control signaling.
  • SCI sidelink control information
  • the shared allocation information is carried in the field of the second-level control information, and the second control information is a sideline physical shared channel (physical sidelink). control information carried by shared channel, PSSCH).
  • an embodiment of the present application provides a communication method.
  • the method includes: a second terminal receives first information, where the first information is used to indicate a second resource, and the second resource is used for the second
  • the terminal sends sideline information, and the second resource is a subset of the first resource, and the first resource is a resource reserved by the first terminal for sending sideline information; the second terminal determines the the second resource.
  • the second terminal can use the pre-configured information of the first terminal.
  • the second terminal is inconvenient to select resources (for example, the second terminal is a power-sensitive terminal device) or the second terminal does not have the resource selection capability, with the assistance of the first terminal, the second terminal does not
  • the resource selection can also obtain resources for sending sideline information, which not only ensures the reliability of the resources of the second terminal, but also ensures the continuity of the services of the second terminal.
  • the above-mentioned first resource includes a first reserved resource and/or a second reserved resource
  • the first reserved resource is a resource determined through resource reservation method 1, that is, a periodically reserved resource
  • the second reserved resource is a resource determined by resource reservation mode 2, that is, a reserved resource indicated by TRIV and FRIV, and the reserved resource refers to a time-frequency reserved resource determined in advance for data to be sent.
  • the first information is used to indicate the location of the first resource and the location of the second resource in the first resource.
  • the first terminal determines the location of the first resource and the location of the second resource in the first resource, and then indicates to the second terminal the location of the first resource and the location of the second resource to the second terminal through the first information.
  • the location in the first resource the second terminal can determine the location of the second resource that the second terminal can use to send the sideline information through the first information, and send the sideline information of the second terminal on the second resource reserved by the first terminal , through the communication method, the second terminal can obtain resources capable of sending sideline information without performing resource selection, thereby ensuring the reliability of the resources of the second terminal.
  • the second resource is determined according to the second information; the method further includes: the second terminal to the The first terminal sends second information, where the second information is used to request resources for the second terminal to send sideline information.
  • the second terminal sends the second information to the first terminal, and requests the first terminal for resources for sending sideline information. After the first terminal receives the second information, the second information The first terminal is triggered to send the first information for the second terminal to determine the second resource to the second terminal.
  • the second information includes resource request information of the second terminal, and the resource request information is used to trigger the first terminal to determine the first resource.
  • the resource request information is a service request. , SR).
  • the second information includes the amount of data to be sent on the sidelink of the second terminal;
  • the second resource is determined according to the amount of data to be sent on the sidelink of the second terminal.
  • the second terminal sends the second information to the first terminal, and requests the first terminal for resources for sending sideline information. After receiving the second information, the first terminal The content determines the second resource, and then sends the first information for indicating the second resource to the second terminal.
  • the second information includes resource requirement information of the second terminal, such as the size of physical resources specifically required by the second terminal, or the number of bits of data to be sent by the second terminal, etc.
  • the resource requirement information is used for The time-frequency location of the first resource is determined by the first terminal, as an example and not a limitation, and the resource request information is a buffer state report (buffer state report, BSR).
  • the second resource is determined according to the size of the resource used to carry third information, where the third information is resource request information and / or buffer status report.
  • the second resource is determined according to third information
  • the third information is a service request (service requirement, SR) or a buffer state report (buffer state report, BSR)
  • the second resource determined according to the third information is The preset resource requirement negotiated after the first terminal and the second terminal establish a sidelink connection, where the preset resource requirement includes the size of the periodic resource for the second terminal to send the sidelink data.
  • the second resource is determined according to the number of bits of the resource request information and/or the buffer status report, or according to the size of the resource for sending the resource request information and/or the buffer status report.
  • the preset resource requirement may be that the first terminal sends indication information to the second terminal with a period of P ms, where P is a positive integer, and the indication information is used to indicate the size and location of physical resources, and the physical The size of the resource is the default size negotiated by the two parties.
  • the first information includes a message used to instruct the second terminal to use the second resource to send a sideline Information indicating information.
  • the first terminal sends indication information to the second terminal, where the indication information is used to instruct the second terminal to use the second resource to send sideline information of the second terminal, where the sideline information includes control information And/or data, for example, the service request (service requirement, SR) of the second terminal, the buffer state report (buffer state report, BSR), the data to be sent on the second terminal, etc.
  • the second terminal can use the above-mentioned second terminal.
  • the resource sends sideline information to the first terminal, and the second resource may also be used to send sideline information to other terminals, which is not limited in this application.
  • the indication information is carried in the field of the first-level control information, and the first control information is carried by the sideline physical control channel PSCCH. control information.
  • the first information includes shared allocation information, and the shared allocation information is used to determine the second resource at the location of the first resource.
  • the shared allocation information is carried in the field of the second-level control information, and the second control information is carried by the sideline physical shared channel PSSCH control information.
  • the first terminal sends the shared allocation information to the second terminal, where the shared resource allocation information is used to indicate the specific use of the reserved resources of the first terminal between the first terminal and the second terminal Allocation, that is, the specific use allocation of the first resource between the first terminal and the second terminal, that is, the specific use allocation of the first resource between the first terminal and the second terminal, the second terminal can The allocation information determines the second resource from the first resource.
  • the shared allocation information indicates the resources in the first resource for the first terminal to send the sidelink information to the second terminal, and the resources in the first resource for the second terminal to send the sidelink information, that is The second resource, the second terminal receives the sidelink information sent by the first terminal on the resource where the first terminal sends the sidelink information to the second terminal in the first resource, and sends the sidelink information sent by the first terminal to the first terminal and/or the second terminal on the second resource. Terminals other than one terminal send sideline information.
  • the specific location of the sending and receiving resources of the second terminal in the time-frequency domain can be determined by the first terminal, so that the second terminal can save unnecessary monitoring energy consumption.
  • the second terminal since the second terminal has only one communication peer, the second terminal can only The reception is performed on the time slot corresponding to the second resource, thereby reducing the energy consumption of blind reception and realizing energy saving.
  • the first terminal shares the allocation information with the second terminal to indicate the specific location where the second terminal monitors and sends resources
  • the second terminal only needs to send or receive information at the location indicated by the first information, and the radio frequency module can be turned off at other times, thereby realizing energy saving.
  • the resources for information exchange between the first terminal and the second terminal can be indicated in one SCI, which reduces the overhead of control signaling.
  • a communication apparatus in a third aspect, can be used to perform the operations of the first aspect and the communication device in any possible implementation manner of the first aspect.
  • the communication apparatus includes means for performing the steps or functions described in the first aspect.
  • the corresponding means may be the first communication device of the first aspect.
  • the steps or functions can be implemented by software, or by hardware, or by a combination of hardware and software.
  • a communication apparatus in a fourth aspect, can be used to perform the operation of the communication device in the second aspect and any possible implementation manner of the second aspect.
  • the apparatus may include means for performing the steps or functions described in the second aspect above.
  • the steps or functions can be implemented by software, or by hardware, or by a combination of hardware and software.
  • a computer-readable medium stores a computer program (also referred to as code, or instruction) when it is run on a computer, causing the computer to execute the above-mentioned first to sixth aspects.
  • the method in any possible implementation manner of the two aspects.
  • a chip system including a memory and a processor, the memory is used for storing a computer program, and the processor is used for calling and running the computer program from the memory, so that the communication device installed with the chip system executes the above-mentioned The method in any one possible implementation manner of the first aspect to the second aspect.
  • a chip in a seventh aspect, includes a processor and a communication interface, the communication interface is used to communicate with an external device or an internal device, and the processor is used to implement any one of the above-mentioned first to third aspects. method in the implementation.
  • the chip may further include a memory in which instructions are stored, and the processor is configured to execute the instructions stored in the memory or derived from other instructions. When the instruction is executed, the processor is configured to implement the method in any possible implementation manner of the first aspect to the third aspect.
  • the chip may be integrated on an access network device.
  • a computer program product comprising: a computer program (also referred to as code, or instructions), which, when the computer program is executed, causes a computer to execute the above-mentioned first to sixth aspects The method in any of the three possible implementations.
  • a communication device including a processor and a memory, the memory is used for storing a computer program, the processor is used for calling and running the computer program from the memory, so that the communication device executes the first to third A communication method in any of the possible implementations of the aspect.
  • the processor is one or more, and the memory is one or more.
  • the memory may be integrated with the processor, or the memory may be provided separately from the processor.
  • a communication device in one possible design, includes a communication interface, a processor and a memory.
  • the processor is used to control the communication interface to send and receive signals
  • the memory is used to store a computer program
  • the processor is used to call and run the computer program from the memory, so that the communication device executes the first to fourth aspects or the first to third aspects method in any of the possible implementations.
  • a system comprising the above communication apparatus.
  • the second terminal may not perform resource monitoring, and use the first terminal to determine the resources for the second terminal to send the sideline information, so as to ensure the sustainability of the service of the second terminal.
  • the first terminal can also directly instruct the second terminal to monitor the location where the first terminal sends information and the resource location where the second terminal sends sideline information.
  • the second terminal only needs to send or receive information at the indicated location, and the radio frequency module at other times can Do shutdown processing to achieve energy saving.
  • the resources for information interaction between the first terminal and the second terminal can be indicated in one sideline control information, which reduces the overhead of control signaling.
  • FIG. 1 is a schematic diagram of an application scenario to which the method according to the embodiment of the present application is applicable.
  • FIG. 2 is a schematic structural diagram of an SL frame involved in an embodiment of the present application.
  • FIG. 3 is a schematic diagram of a resource reservation manner corresponding to the first understanding manner involved in the embodiment of the present application.
  • FIG. 4 is a schematic diagram of a resource reservation manner corresponding to the second understanding manner involved in the embodiment of the present application.
  • FIG. 5 is a schematic flowchart of a communication method provided by an embodiment of the present application.
  • FIG. 6 is a schematic block diagram of a communication apparatus provided by an embodiment of the present application.
  • FIG. 7 is a schematic structural diagram of a communication device provided by an embodiment of the present application.
  • WCDMA wideband code division multiple access
  • E-UTRAN evolved global terrestrial radio access network
  • NG-RAN next generation radio access network
  • LTE long term evolution
  • WiMAX worldwide interoperability for microwave access
  • the business scenarios (or application scenarios) described in the embodiments of the present application are for the purpose of illustrating the technical solutions of the embodiments of the present application more clearly, and do not constitute a limitation on the technical solutions provided by the embodiments of the present application. With the emergence of new business scenarios, the technical solutions provided in the embodiments of the present application are also applicable to similar technical problems.
  • the word "exemplary” is used to mean serving as an example, illustration or illustration. Any embodiment or implementation described in this application as an “example” should not be construed as preferred or advantageous over other embodiments or implementations. Rather, the use of the word example is intended to present a concept in a concrete way.
  • FIG. 1 shows a schematic diagram of an application scenario provided by an embodiment of the present application.
  • the communication system of the present application may include an access device and multiple terminal devices, and two terminal devices may use Access the communication resource pool configured by the device for inter-device communication.
  • FIG. 1 is only a schematic diagram and does not constitute any limitation to the protection scope of the present application.
  • the number of terminal devices shown in FIG. 1 is just an example.
  • the direct communication between the terminal device and the terminal device in the communication system of the present application is called inter-device communication (device to device, D2D).
  • D2D device to device
  • D2D the communication between the terminal device and the terminal device is possible within a certain distance.
  • Direct communication does not need to pass through the access device, and each terminal device can send and receive signals, and has the function of automatic routing (forwarding messages).
  • the present application can be applied to transmission from terminal equipment to terminal equipment within the coverage of access equipment, transmission from terminal equipment to terminal equipment partially covered by access equipment, and transmission from terminal equipment to terminal equipment not covered by access equipment.
  • the terminal equipment in the embodiments of the present application may also be referred to as: user equipment (user equipment, UE), mobile station (mobile station, MS), mobile terminal (mobile terminal, MT), access terminal, subscriber unit, subscriber station, Mobile station, mobile station, remote station, remote terminal, mobile device, user terminal, terminal, wireless communication device, user agent or user equipment, etc.
  • user equipment user equipment
  • MS mobile station
  • MT mobile terminal
  • access terminal subscriber unit, subscriber station, Mobile station, mobile station, remote station, remote terminal, mobile device, user terminal, terminal, wireless communication device, user agent or user equipment, etc.
  • the terminal device may be a device that provides voice/data connectivity to the user, such as a handheld device with a wireless connection function, a vehicle-mounted device, and the like.
  • some examples of terminals are: mobile phone (mobile phone), tablet computer, notebook computer, PDA, mobile internet device (MID), wearable device, virtual reality (virtual reality, VR) device, augmented reality (augmented reality, AR) equipment, wireless terminals in industrial control, wireless terminals in self-driving, wireless terminals in remote medical surgery, and smart grids wireless terminal in transportation safety, wireless terminal in smart city, wireless terminal in smart home, cellular phone, cordless phone, session initiation protocol , SIP) telephones, wireless local loop (WLL) stations, personal digital assistants (PDAs), handheld devices with wireless communication capabilities, computing devices or other processing devices connected to wireless modems, automotive Equipment, wearable devices, terminal equipment in the future 5G network or terminal equipment in the future evolved public land mobile network (PLMN), etc.
  • MID mobile internet device
  • MID mobile internet device
  • constrained devices such as devices with lower power consumption, or devices with limited storage capacity, or devices with limited computing power, etc.
  • constrained devices such as devices with lower power consumption, or devices with limited storage capacity, or devices with limited computing power, etc.
  • it includes barcodes, radio frequency identification (radio frequency identification, RFID), sensors, global positioning system (global positioning system, GPS), laser scanners and other information sensing devices. This embodiment of the present application does not limit this.
  • the terminal device may also be a wearable device.
  • Wearable devices can also be called wearable smart devices, which are the general term for the intelligent design of daily wear and the development of wearable devices using wearable technology, such as glasses, gloves, watches, clothing and shoes.
  • a wearable device is a portable device that is worn directly on the body or integrated into the user's clothing or accessories. Wearable device is not only a hardware device, but also realizes powerful functions through software support, data interaction, and cloud interaction.
  • wearable smart devices include full-featured, large-scale, complete or partial functions without relying on smart phones, such as smart watches or smart glasses, and only focus on a certain type of application function, which needs to cooperate with other devices such as smart phones.
  • the terminal of the present application may also be an on-board module, on-board module, on-board component, on-board chip or on-board unit built into the vehicle as one or more components or units.
  • a component, on-board chip or on-board unit may implement the method of the present application.
  • the access device in this embodiment of the present application may be a device used to communicate with a terminal device, and the access device may also be referred to as an access network device or a wireless access network device, for example, the access device may be an LTE system
  • the evolved base station (evolved NodeB, eNB or eNodeB) in the network can also be a wireless controller in a cloud radio access network (cloud radio access network, CRAN) scenario, or the access device can be a relay station, access point, Vehicle-mounted devices, wearable devices, access devices in future 5G networks or access devices in future evolved PLMN networks, etc., can be access points (access points, APs) in WLANs, or new wireless systems (new wireless systems).
  • the gNB in the radio, NR) system is not limited in this embodiment of the present application.
  • the access device is a device in the RAN, or in other words, is a RAN node that accesses the terminal device to the wireless network.
  • an access device it can be enumerated: gNB, transmission reception point (TRP), evolved Node B (evolved Node B, eNB), radio network controller (radio network controller, RNC), Node B (Node B, NB), Base Station Controller (BSC), 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 wireless fidelity (wireless fidelity, Wifi) access point (access point, AP), etc.
  • an access device may include a centralized unit (centralized unit, CU) node, or a distributed unit (distributed unit,
  • DU node
  • RAN equipment including CU node and DU node
  • RAN equipment of control plane CU node (CU-CP node) and user plane CU node (CU-UP node) and DU node or RAN equipment of control plane CU node (CU-CP node) and user plane CU node (CU-UP node) and DU node.
  • the access device provides services for the cell, and the terminal device communicates with the access device through the transmission resources (for example, frequency domain resources, or spectrum resources) used by the cell, and the cell may correspond to the access device (for example, a base station).
  • a cell can belong to a macro base station or a base station corresponding to a small cell.
  • the small cell here can include: urban cell (metro cell), micro cell (micro cell), pico cell (pico cell), millicell Femto cells, etc. These small cells have the characteristics of small coverage and low transmission power, and are suitable for providing high-speed data transmission services.
  • a carrier in an LTE system or a 5G system can have multiple cells working on the same frequency at the same time.
  • the concepts of the above-mentioned carrier and cell can also be considered equivalent.
  • CA carrier aggregation
  • the concepts of the carrier and the cell are equivalent, for example, the terminal equipment accessing a carrier is equivalent to accessing a cell.
  • the communication system of the present application can also be applied to the vehicle to everything (V2X) technology, that is, the terminal device of the present application can also be a car, for example, a smart car or an autonomous car.
  • V2X vehicle to everything
  • V2X represents different communication targets.
  • V2X can include but is not limited to: vehicle to vehicle (V2V), vehicle to roadside unit (V2I), vehicle to network (vehicle to network) , V2N), and vehicle to pedestrian (V2P).
  • V2V can be regarded as a special case of device to device (D2D) communication.
  • D2D device to device
  • V2X services can be provided in two ways: namely, the way based on the PC5 interface and the way based on the Uu interface.
  • the PC5 interface is an interface defined on the basis of a straight-through link, and by using this interface, communication transmission can be directly performed between communication devices (eg, automobiles).
  • the PC5 interface can be used outside of coverage (OOC) and in coverage (IC), but only authorized communication devices can use the PC5 interface for transmission.
  • the Uu interface is an interface used for wireless communication between a terminal and an access device.
  • mode 1 a mode based on access device scheduling
  • mode 2 a UE autonomous resource selection mode.
  • the two transmission modes have their own advantages and disadvantages, and can be flexibly used in various scenarios.
  • This mode requires the UE to be in the radio resource control (RRC) connected state.
  • RRC radio resource control
  • the UE first requests resources from the access device (for example, the eNB), and the access device will centrally allocate resources according to the buffer status report (BSR) of the UE.
  • the base station may inform the transmitting end UE of the time-frequency resources of the sideline data through downlink control information (downlink control Information, DCI).
  • DCI downlink control Information
  • SCI sidelink control Information
  • the lateral transmission resources of each UE are uniformly scheduled by the access device, so resource collision can be avoided.
  • the sending UE can also communicate in this mode without network coverage. In this mode, the UE no longer depends on the scheduling of the access device. The UE will select the sideline transmission resources based on the result of its own listening, and independently adjust the transmission format of control information and data on the V2X direct link.
  • the resource listening window can be defined as T time slots before the resource selection trigger, and the resource selection window can be defined as [n+T 1 after the resource selection trigger. ,n+T 2 ] corresponds to the time slot, the UE's specific resource listening and selection process is as follows:
  • the UE at the transmitting end listens to the SCIs sent by other UEs in the frequency domain resource pool within the resource listening window.
  • the UE at the transmitting end judges the sensed SCI. If the monitored SCI includes resources that have been reserved by other UEs, and the reserved resources are located within the resource selection window [n+T 1 , n+T 2 ] of the UE at the transmitting end, then the UE at the transmitting end will compare the monitored SCI to the resource selection window [n+T 1 , n+T 2 ].
  • the corresponding resource is used to measure the reference signal received power (RSRP) of the physical sidelink shared channel (PSSCH), and if the measured result is higher than the preset RSRP threshold Th RSRP , the The candidate resource is excluded from the selection window.
  • the above-mentioned preset RSPR threshold Th RSRP is determined according to the priority corresponding to the data indicated in the SCI sensed by the transmitting end UE and the priority corresponding to the data to be sent by the transmitting end UE.
  • the UE at the transmitting end selects transmission resources from the remaining candidate resource sets, and sends sideline control and data to the UE at the receiving end on the selected resources.
  • resource collision may occur.
  • resources can also be randomly selected in a special resource pool configured by a high layer, but the randomly selected resources have a high collision probability and transmission reliability is difficult to guarantee.
  • the side link may also be called a side link, a side link, or the like, which is not limited in this embodiment of the present application.
  • a side link is a direct link connection between two V2X terminals, and a V2X terminal is a terminal with V2X functions.
  • the communication interface of the side link is the PC-5 air interface.
  • sidelink SL transmission Data transmission between two V2X terminals on the sidelink is called sidelink SL transmission.
  • Two V2X terminals may establish a sidelink connection before performing sidelink SL transmission.
  • Two V2X terminals can establish a side link connection through the application layer.
  • two V2X terminals can establish a side link connection through an APP pairing. The side link is connected, but the access device does not perceive the specific interaction information.
  • the side link connection can also be established directly by two terminal devices without going through the access device.
  • the terminal device sends a broadcast message, and other terminal devices receive the broadcast message and determine whether to respond according to their own conditions. If successful In response, a side link connection is established between the above two terminal devices.
  • a resource pool In LTE-V2X, a resource pool (RP) is defined.
  • the resource pool is a resource pool consisting of time domain resources (composed of several sideline subframe subframes, each subframe contains consecutive M symbols) and frequency domain resources (composed of several subchannel subchannels, one subchannel is composed of several consecutive
  • a resource set composed of RBs) is used for SL transmission between two terminals.
  • the sender sends the sideline control information SCI in the resource pool, and the SCI is carried on the PSCCH. SCI is used to schedule data, which is carried on PSSCH.
  • the resource pool may refer to resources used for sidelink control information and data transmission.
  • the access device may use a bitmap, and periodically repeat the bitmap to indicate the subframes used for V2V communication in all subframes in the system.
  • a set wherein the number of symbols occupied by SL transmission in each subframe is a fixed number of M symbols, and M may be defined as the duration of one SL time-domain transmission, or M as a time-domain transmission unit.
  • the access device divides the frequency band used for V2V communication into several sub-channels N, and the number of resource blocks n CH (resource blocks, RB) in each sub-channel is The same, wherein the access device will indicate the sequence number of the first resource block of the frequency resource used for V2V communication.
  • scheduling V2X communication resources scheduling is performed with sub-channel granularity in the frequency domain, and V2V SL transmission can occupy one or more sub-channels at a time.
  • the frequency domain resource includes several RBs, which means that the frequency domain resource includes the frequency domain bandwidth corresponding to the several RBs.
  • the embodiment of the present application does not limit the number of subcarriers included in one RB.
  • the time domain resources include one or more time units, and the time units may be radio frames, subframes, time slots, symbols, and the like.
  • One radio frame may include multiple subframes, one subframe may include one or more time slots (slots), and one time slot may include at least one symbol (symbol).
  • one radio frame may include multiple slots, and one slot may include at least one symbol.
  • An SL time slot is located in a time slot (slot) in the time domain and occupies multiple consecutive symbols (symbol), the start symbol position of the SL time slot (start symbol) and the number of occupied continuous symbols (SL Symbols length) are both. Configured by higher layers.
  • all the SL time slots in the same resource pool have the same time domain starting position and the same number of time domain persistent symbols.
  • the SL physical channel transmitted on the SL time slot includes the physical sidelink shared channel (PSSCH), the physical sidelink broadcast channel (PSBCH), the physical sidelink control channel (physical sidelink control channel, PSCCH) and the physical sidelink feedback channel (PSFCH).
  • PSSCH physical sidelink shared channel
  • PSBCH physical sidelink broadcast channel
  • PSCCH physical sidelink control channel
  • PSFCH physical sidelink feedback channel
  • PSBCH and sidelink physical synchronization signal block are transmitted together, which are used to carry synchronization information such as sidelink frame number, resource pool time slot configuration, subframe number, etc.
  • S-SSB includes primary synchronization Signal and secondary synchronization signal;
  • PSFCH is used to carry the HARQ-ACK information of its corresponding PSSCH.
  • PSSCH is used to carry data information, second control information and higher layer signaling information.
  • the data information is service information from terminal equipment to terminal equipment.
  • the second control information is mainly used to carry other control information other than the PSSCH DMRS, and may specifically include channel state information (CSI) reporting trigger information, the IP of the destination terminal of the PSSCH, the PSSCH HARQ process number, and the new data indication. (new data indicator), HARQ transmission version number and other information.
  • the format of the second control information can be adjusted correspondingly according to the type of the service information carried. In other words, the second control information has multiple formats.
  • the high-level signaling mainly refers to the signaling information of the media access control (media access control, MAC) layer.
  • the PSCCH is used to carry control information
  • the control information may be referred to as first control information
  • the control information includes physical layer resource information of the sideline data channel, DMRS configuration information, the number of DMRS ports, coded modulation signals (modulation and modulation) code signal, MCS) and demodulation information such as the format of the second control information.
  • MCS coded modulation signals
  • demodulation information such as the format of the second control information.
  • the number of control information bits carried by the first control information is fixed, so when the receiving end detects the PSCCH, it is not necessary to perform blind detection on the PSCCH format.
  • Figure 2 shows a schematic diagram of PSCCH and PSSCH in a specific frame structure.
  • One PSSCH transmission in the frequency domain includes two subchannels, PSCCH is transmitted in one subchannel, and the subchannel bandwidth is 10PRB, The bandwidth of the PSCCH is the same as the subchannel bandwidth.
  • 3 symbols occupied in the PSCCH time domain The first symbol in the time domain is the copy of the second symbol, which is functionally the symbol for automatic gain control (AGC) at the receiving end.
  • AGC automatic gain control
  • the last symbol is idle and does not map any information, which is convenient for the receiving end to perform sending and receiving switching. .
  • one PSSCH transmission occupies an integer number of subchannels, that is, the minimum frequency domain granularity of the frequency domain resources occupied by PSSCH transmission is one subchannel.
  • the number of PRBs is configured by the resource pool, and its starting position in the frequency domain is aligned with the minimum PRB index position of the subchannel;
  • one PSCCH is limited to be transmitted in one subchannel, that is, the frequency domain bandwidth of the PSCCH is less than or equal to one subchannel bandwidth, when The domain occupies 2 to 3 symbols, and the number of PRBs in the specific PSCCH frequency domain bandwidth is configured by the resource pool, and is mapped on the subchannel with the smallest (low) frequency domain index of the PSSCH.
  • PSSCH and PSCCH are transmitted in one SL slot.
  • the minimum frequency domain granularity of the frequency domain resources occupied by PSCCH transmission is one subchannel, it is possible to send an independent PSSCH on each subchannel, that is, there may be PSCCH on each subchannel, so The receiving end needs to blindly detect the presence or absence of PSCCH on each subchannel. When the receiving end detects the PSCCH, it will decode the corresponding PSSCH according to the indication information of the first control information carried on it to obtain the second control information. content, and then further decode the data carried on the PSSCH.
  • the PSSCH when transmitted, it needs to be transmitted together with a corresponding PSCCH to ensure that the starting position of the PSSCH and the PSCCH is the same in the frequency domain. That is, when the terminal detects the PSCCH, it can know the PSSCH corresponding to the PSCCH. The starting position of the frequency domain.
  • Resource reservation refers to time-frequency resources that are determined or reserved in advance for data to be sent.
  • the terminal may reserve periodic resources or aperiodic resources, or a combination of the two.
  • the terminal reserves a series of resources with a certain periodic interval, and also reserves one or more aperiodic resources in each periodic interval, and the aperiodic resources in the periodic interval can be used for the retransmission of the terminal.
  • Both the above-mentioned mode 1 and mode 2 transmission modes support resource reservation.
  • the resources for the UE to send PSSCH/PSCCH and the reserved resources come from the scheduling grant of the access device; when the UE is in the transmission mode 2, the resources for the UE to send PSSCH/PSCCH and the reserved resources are determined by the UE Determined according to its own listening results.
  • the resource reservation methods supported by both Mode 1 and Mode 2 are as follows:
  • the resource pool where the PSCCH is located is configured for periodic resource reservation, it can indicate whether the data packet is a packet by carrying a field in the first-level control information corresponding to the PSCCH—resource reservation period (resource reservation period). There is periodic resource reservation. If the data packet has periodic resource reservation, this field can also be used to indicate the number of periodic reservations. This field may indicate whether the service corresponding to the PSCCH has periodic reservation. For example, if the field indicates that the period is 0ms, it means that there is no periodic resource reservation; if the field indicates that the period is x ms, and x is a positive integer greater than 0, it indicates that the service corresponding to the PSCCH has periodic reservations , and the reservation period is x ms.
  • the resources reserved in this field can be used to indicate whether the transport block (TB) carried on the PSSCH corresponding to the PSCCH has resource reservation for retransmission. If the transport block has resource reservation for retransmission, this field also uses In order to indicate the specific time-frequency position reserved, its retransmission resources are indicated by the value TRIV (time resource indicator value) of the field time domain resource allocation and the value FRIV (frequency resource indicator value) of the frequency domain resource allocation.
  • TRIV time resource indicator value
  • FRIV frequency resource indicator value
  • TRIV can indicate the current PSSCH and PSCCH transmission, or indicate the time domain position of the subsequent PSSCH and PSCCH retransmission resources.
  • the maximum transmission times of the transport block can be configured by the resource pool. Specifically, taking the number of PSSCH and PSCCH retransmissions as one and two as an example, the meaning of the time domain resource allocation field is as follows:
  • the FRIV may indicate the current PSSCH and PSCCH transmission, or indicate the frequency domain location of the PSSCH and PSCCH retransmission resources for multiple subsequent times.
  • the meaning of the frequency domain resource allocation field is as follows:
  • the frequency domain bandwidth of each PSSCH and PSCCH retransmission resources indicated by FRIV may be the same or different.
  • the size of the frequency domain bandwidth can be indicated by a bit value, which is not limited in this application.
  • the first reserved resources are resources determined through resource reservation method 1, that is, resources reserved periodically, and the second reserved resources are determined through resource reservation method 2.
  • Resources that is, resources indicated by TRIV and FRIV.
  • the resources reserved by the above two resource reservation methods include the following two ways of understanding:
  • the resource reservation period x ms indicated in the first-level control information is not 0ms, it means that only the resources occupied by the PSSCH and PSCCH are reserved periodically. In other words, the resources reserved by the second resource reservation method TRIV Retransmission resources are only valid within this reservation period.
  • the PSSCH and PSCCH only indicate the periodic reservation of A series resources. Reservation, resources B1 and C1 reserved by TRIV are only limited in this cycle.
  • the resource reservation period x ms indicates the time domain position of A2, where the time offset of A2 from A1 is x ms, that is, the interval is x ms.
  • the resource reservation period x ms indicated in the first-level control information periodically reserves all resources indicated by TRIV, in other words, the pair of resources reserved by the second resource reservation method TRIV are reserved by the first reservation method. Each reservation period reserved is valid.
  • the resource reservation period is valid for all resources indicated by the TRIV.
  • TRIV reserves B1 and C1
  • the resource reservation period that is not 0 reserves A2, B2 and C2 in the next period, and the time offset from A2, B2 and C2 to their corresponding A1, B1 and C1 is x ms.
  • the above resource reservation method is only an example and not a limitation.
  • the solution of the present application can also realize the sharing of reserved resources among different terminals.
  • This application does not make any limitation on the specific manner of reserving resources.
  • the resources reserved by the above two methods are only used by the reserved terminal itself, and the reserved resources between different terminals are independent of each other and cannot be shared, resulting in a certain degree of resource waste.
  • the terminal if the terminal selects transmission resources in the resource pool in the self-selected mode according to the result of its own listening, the terminal needs to receive the SL signal in each time slot and decode each possible PSSCH and PSCCH.
  • the terminal device is a power consumption sensitive device, for example, it is inconvenient to charge, or a device with a relatively small battery capacity, if the terminal device selects resources based on interception, the power consumption is large, and it is difficult to meet the service continuity requirements.
  • the terminal can also randomly select resources from a specially configured resource pool for transmission, but the randomly selected resources have a high collision probability and transmission reliability is difficult to guarantee.
  • the present application proposes a communication method, which can realize resource sharing between terminals through cooperation, which can not only save a certain amount of resource overhead, but also ensure the reliability of resource selection for power consumption-sensitive terminals.
  • the following description takes the application of the communication method provided by the embodiment of the present application to a V2X scenario as an example for description.
  • the present application can be applied to the V2X transmission scenario within the coverage of the access device, the V2X transmission scenario partially covered by the access device, and the V2X transmission scenario not covered by the access device.
  • the communication method provided in this embodiment of the present application may be executed by the terminal device in FIG. 1 .
  • the terminal device may be the entire terminal of the terminal, or one or more components in the terminal that can execute the following method processes.
  • a combination of individual components, or a chip in a terminal capable of implementing the following method process, etc., are not limited in the embodiments of the present application.
  • the receiving process of the receiving end is as follows.
  • the receiving end will blindly detect the presence or absence of the PSCCH on each sub-channel.
  • the indication information decode the corresponding PSSCH to obtain the content of the second control information, and further decode the data carried on the PSSCH.
  • the link for communication between the terminal devices involved in the above-mentioned V2X system is referred to as a side link, which does not constitute any limitation to this application.
  • a side link may also be called a side link, a straight-through link, or a secondary link, or the like.
  • the side link that transmits auxiliary information can be called the auxiliary link; in addition, it is not necessarily limited to the V2X system.
  • the link for communication between end devices may also be referred to as a side link.
  • FIG. 5 which is a flowchart of a communication method 100 provided by an embodiment of the present application, the method may be executed by two V2X terminals, and the communication method is described below by taking the first terminal and the second terminal as examples. As shown in Figure 3, the method includes:
  • a first terminal establishes a sidelink connection with a second terminal.
  • Two V2X terminals can establish a side link connection through the application layer.
  • two V2X terminals can establish a side link connection through an APP pairing. The side link is connected, but the access device does not perceive the specific interaction information.
  • the side link connection can be established directly by two terminal devices without going through the access device.
  • the terminal device sends a broadcast message, and other terminal devices receive the broadcast message and determine whether to respond according to their own conditions. If the response is successful, then A sidelink connection is established between the above two terminal equipments.
  • the first terminal and the second terminal may establish an auxiliary relationship, or the first terminal and the second terminal may establish a cooperative relationship between terminals, or the first terminal and the second terminal may form a unicast pair. It is understood that the first terminal establishes a side link connection with the second terminal.
  • the first terminal determines the first resource.
  • the first terminal may use the method in the above transmission mode 1 to determine the first resource, and the access device may schedule the sideline transmission resources for the first terminal, or the method in the above transmission mode 2 may be used to determine the first resource, and the first terminal
  • the access device may schedule the sideline transmission resources for the first terminal, or the method in the above transmission mode 2 may be used to determine the first resource, and the first terminal
  • By listening to the autonomous selection of sideline transmission resources in the communication resource pool it is also possible to randomly select the first resource in the special resource pool configured by the higher layer, and the first resource is reserved by the first terminal for sideline transmission. Resources.
  • the above-mentioned first resource is a reserved resource of the first terminal, and the reserved resource refers to a time-frequency reserved resource determined in advance for data to be sent.
  • first resources include resources that can be used by the first terminal to transmit sideline information of the first terminal, and resources that can be used by the second terminal to transmit sideline information of the second terminal.
  • resources that can be used by the second terminal to transmit sideline information of the second terminal.
  • a resource used by the second terminal to transmit the sideline information of the second terminal is called a second resource, and the second resource is a subset of the first resource.
  • the first terminal determines the first resource according to a preset requirement, and the preset requirement is determined through negotiation after the first terminal and the second terminal establish a sidelink connection.
  • the preset requirement may be that the first terminal sends indication information to the second terminal with a period of P ms, where P is a positive integer, and the indication information is used to indicate the number and location of physical resources, and the size of the physical resources is two. The default size negotiated by the user.
  • the second resource in the first resource may be determined according to the size of the resource bearing the third information, or in other words, the second resource is determined according to the third information, and the third information includes the service request ( service requirement, SR) and/or buffer state report (buffer state report, BSR), the second resource may be based on the number of bits included in the resource request information and/or the buffer state report, or the third information may be bearer resource request group information and/or Or the size of the resources required for the buffer status report packet is determined.
  • the above-mentioned second resource can be used for sending the second information, and the second resource at this time is the same as the third resource determined by the first terminal when the second terminal has no resource selection capability. Equivalent, both are determined by the first terminal according to the size of carrying third information, and the third information is a subset of the second information.
  • the second terminal may use the above-mentioned second resource to send sideline information of the second terminal, where the sideline information includes control information and/or data, for example, a service requirement (SR) of the second terminal, Buffer state report (BSR), data to be sent on the second terminal, etc.
  • sideline information includes control information and/or data, for example, a service requirement (SR) of the second terminal, Buffer state report (BSR), data to be sent on the second terminal, etc.
  • SR service requirement
  • BSR Buffer state report
  • the second terminal may send sideline information to the first terminal by using the second resource in the above-mentioned first resources, and may also send sideline information to other terminals, which is not limited in this application.
  • the first terminal determines the first resource according to the second information
  • the communication method further includes step S103, the second terminal sends the second information to the first terminal, and the second information is used for The second terminal determines a second resource, where the second resource is a resource used for sideline transmission by the second terminal.
  • the second information includes resource request information of the second terminal, and the resource request information is used to trigger the first terminal to determine the first resource.
  • the resource request information may include a service request (service requirement, SR). ).
  • the second information includes resource requirement information of the second terminal, such as the size of physical resources specifically required by the second terminal, or the number of bits of data to be sent by the second terminal, etc.
  • the resource requirement information is used for The first terminal determines the time-frequency position of the first resource.
  • the resource request information may include a buffer state report (buffer state report, BSR).
  • the second terminal Before the second terminal sends the second information to the first terminal, the second terminal needs to determine a third resource, where the third resource is a sideline transmission resource used by the second terminal to send the second information, and then the third resource how to determine it.
  • the third resource is a sideline transmission resource used by the second terminal to send the second information
  • the second terminal does not have the ability to select resources, and the access device does not schedule resources for the second terminal that can be used for sidelink transmission, that is, the second terminal currently does not have the ability to send the resources of the second information
  • the first terminal determines the third resource according to the size of the resource used to carry the third information, where the third information is resource request information and/or or buffer status reports.
  • the first terminal determines the third resource according to third information, where the third information is the number of bits included in the resource request information and/or the buffer status report, or the third information is the bearer resource request group information and/or the buffer status report packet Required resource size.
  • the second terminal sends the above-mentioned second information to the first terminal on the third resource.
  • the second resource is determined according to the size of the resource bearing the third information
  • the second resource is equal to the third resource, and both are determined by the first terminal according to the size of the third information bearing. , are used to send the service request of the second terminal (service requirement,
  • SR buffer state report
  • BSR buffer state report
  • the first terminal determines the third resource according to a preset requirement, and the preset requirement is determined through negotiation after the first terminal and the second terminal establish a sidelink connection.
  • the preset requirement is The requirement may be that the first terminal sends indication information to the second terminal with a period of P ms, where P is a positive integer, and the indication information is used to indicate the number and location of physical resources, and the number of physical resources is a default value determined through negotiation between the two , the number of information bits carried by the third information is also preset by the two parties through negotiation.
  • the third information may be periodic service data transmission or control information transmission (SR/BSR).
  • the third resource determined by the first terminal according to the size of the resource bearing the third information may be periodic or aperiodic, which is not limited in this application.
  • the first terminal device determines the third resource according to the size of the resource bearing the third information, where the third resource includes periodic resource reservation.
  • the second information is sent on the third resource, and the above-mentioned period may be determined by negotiation after the first terminal and the second terminal establish a sidelink connection.
  • the second terminal may select a third resource with the smallest delay to send the second information.
  • the second terminal has the capability of resource selection, the second terminal can determine the third resource by itself, and the way for the second terminal to determine the third resource can be based on the access
  • the scheduling of the device is determined, either through the transmission mode 2 described above, based on the autonomous selection of the UE, or determined by random selection in a special resource pool configured by a high layer.
  • the second terminal may determine a sidelink transmission resource before establishing a sidelink transmission link with the first terminal, so as to be used for establishing a sidelink link connection between the second terminal and the first terminal in Mode B of S101.
  • the second terminal is a terminal that has resource assistance requirements.
  • the second terminal may be a power consumption-sensitive terminal.
  • the terminal device is inconvenient to charge, or a device with a relatively small battery capacity, or even a device without resource selection. capable terminal, which is not limited in this application.
  • the first terminal sends the first information to the second terminal.
  • the first terminal sends first information to the second terminal, where the first information is used to determine a second resource, and the second resource is a resource for the second terminal to send sideline information.
  • the first information includes resource reservation information, indication information and allocation information of shared resources.
  • the reservation information of the resource is used to indicate the reserved resource, and the reserved resource includes the first reserved resource and/or the second reserved resource, and the first reserved resource is determined by the resource reservation method 1
  • the resource is a periodically reserved resource
  • the second reserved resource is a resource determined by resource reservation mode 2, that is, a resource indicated by TRIV and FRIV.
  • the resource reservation information may be indicated by a related field carried in the first-level control information.
  • the indication information is used to instruct the second terminal to use the second resource to send sideline information, that is, to instruct the second terminal to share the reserved resources of the first terminal.
  • the related field carried in the first-level control information directly instructs the second terminal to share the reserved resources of the first terminal.
  • a related field carried in the first-level control information indicates a second-level control information format
  • the field in the second-level control information corresponding to the format indicates the resources reserved by the first terminal It can be shared with other terminals, that is, the resources reserved by the first terminal are not only used for sending sideline information of the first terminal, but also can be used for sending sideline information of the second terminal.
  • the fields in the above-mentioned second-level control information may be used by the second terminal to determine the specific parsing method of the second-level control information.
  • a related field carried in the first-level control information indicates a second-level control information
  • the format is format 3.
  • the number of bits carried in the second-level control information corresponding to format 3 is a fixed number, and the specific value of the kth field in the second-level control information is used to indicate the specific value of the second control information.
  • the value of the first bit can be 1 to indicate that the second-level control information contains Share allocation information, and parse the second-level control information according to the corresponding analysis method; correspondingly, the value of the first bit can be 0 to indicate that the second-level control information does not contain shared allocation information, that is, all
  • the first resource indicates the reservation information of the first terminal, which will not be shared with other terminal users, and then parses the second-level control information according to a corresponding parsing method.
  • the allocation information of the shared resources is used to indicate the reserved resources of the first terminal, that is, the specific use allocation of the first resources between the first terminal and the second terminal.
  • a second resource is determined in the resource.
  • the allocation information of the shared resource may be indicated by a related field carried in the second-level control information, and the allocation information of the shared resource includes a specific resource allocation mode ( pattern), the index corresponding to the resource allocation pattern (pattern index), and the number of reservation periods n of the periodically reserved resources corresponding to the resource allocation pattern;
  • the number of transmissions N of a TB including the PSSCH and PSCCH this time is a times and the number of reservation cycles n is b times as an example, as an example and not a limitation, Table 1 Specifically, a possible correspondence between the index and the resource allocation mode is given:
  • T indicates that the corresponding reserved resources are used for data transmission of the first terminal.
  • the transmission content may be the cooperation information between the first terminal and the second terminal, that is, the second information; in the table, A (assistance) indicates that the corresponding The reserved resources are used for data transmission by the second terminal.
  • the content of the data to be sent may be resource coordination request information or data information sent by the second terminal to the first terminal, that is, the first information, or the content of the data sent by the second terminal to the first terminal. Data information sent by other terminals.
  • the number of transmissions N of a TB including the PSSCH and PSCCH this time is a times and the number of reservation cycles n is b times as an example, as an example and not a limitation, Table 2 Specifically, a possible correspondence between the index and the resource allocation mode is given:
  • the allocation information of the shared resource may be indicated by a related field carried in the second-level control information, and the allocation information of the shared resource includes a specific resource allocation mode ( pattern), the bit corresponding to the resource allocation pattern, the number of bits of the bit is also used to indicate the number of reservation cycles n of the periodically reserved resources corresponding to the resource allocation pattern;
  • T indicates that the corresponding reserved resources are used for data transmission of the first terminal.
  • the transmission content may be auxiliary information of the first terminal to the second terminal, that is, the second information; in the table, A (assistance) indicates that the corresponding The reserved resources are used for data transmission by the second terminal.
  • the content of the data to be sent may be the resource assistance request information or data information sent by the second terminal to the first terminal, that is, the first information, or the content of the data sent by the second terminal to the first terminal. Data information sent by other terminals.
  • the allocation information of the shared resource may include all or part of the contents listed in the above table, that is, the allocation information of the shared resource may include the correspondence between all possible indexes (or bits) and resource patterns, or It only contains the correspondence between some indexes (or bits) and resource patterns.
  • indexes (or bits) and resource patterns listed in the above table is only an example, and the specific corresponding relationship between indexes (or bits) and resource patterns can be configured according to the actual situation, which is not limited in this application.
  • the allocation information of the shared resources may also include a correspondence between indexes (or bits) and reserved resources available to the second terminal, that is, the allocation information of the shared resources may only indicate the reserved resources available to the second terminal. Reserve resources.
  • the second terminal determines, according to the second information, a sideline transmission resource of the second terminal, that is, the second resource.
  • the second terminal determines, according to the indication information in the second information, that the reserved resources of the first terminal can be shared; and determines according to the reservation information of the resources in the second information.
  • the location of the first reserved resource and/or the second reserved resource, the first reserved resource is a resource determined by resource reservation method 1, that is, a periodically reserved resource, and the second reserved resource is a resource Reserving the resources determined by the second method, that is, the resources indicated by TRIV and FRIV; determining the second resources available to the second terminal according to the allocation information of the shared resources in the second information, such as the physical resource size of the second resources and the second resources. The specific location in the first resource, etc.
  • the second terminal when the second terminal is inconvenient to select resources, for example, the second terminal is in an energy-saving mode, etc., the second terminal may not perform resource monitoring, and the first terminal is used to determine the transmission of the second terminal. Information resources to ensure the sustainability of the second terminal business.
  • the second terminal may be VR glasses. Due to volume and experience requirements, the VR glasses need to save energy.
  • the first terminal may be a signal relay connected to the VR glasses, and the VR glasses It is a unicast pair with the signal repeater.
  • the specific location in the time-frequency domain of the sending and receiving resources of the second terminal can be determined by the first terminal.
  • the second terminal can save unnecessary monitoring energy consumption.
  • the second terminal since the second terminal has only one communication peer, the second terminal can only receive on the time slot corresponding to the resource T indicated by the second resource, thereby reducing the energy consumption of blind reception. To maximize energy saving.
  • the first terminal sends resource assistance information to the second terminal to indicate the specific location where the second terminal monitors and sends resources
  • the second terminal only needs to send or receive information at the indicated position, and the radio frequency module can be turned off at other times to achieve energy saving.
  • the resources for information exchange between the first terminal and the second terminal can be indicated in one SCI, which reduces the overhead of control signaling.
  • pre-set may be pre-saved in a device (for example, a network device) by a corresponding code, a table, or other methods that can be used to indicate relevant information
  • a device for example, a network device
  • a corresponding code for example, a table
  • present application does not limit the specific implementation manner, such as the preset rules and preset constants in the embodiments of the present application.
  • the communication method provided by the embodiment of the present application is described in detail with reference to FIG. 5 .
  • the above communication method is mainly introduced from the perspective of interaction between the first terminal and the second terminal.
  • the first terminal and the second terminal include corresponding hardware structures and/or software modules for performing each function.
  • the present application can be implemented in hardware or a combination of hardware and computer software with the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein. Whether a function is performed by hardware or computer software driving hardware depends on the specific application and design constraints of the technical solution. Skilled artisans may implement the described functionality using different methods for each particular application, but such implementations should not be considered beyond the scope of this application.
  • the transmitting-end device or the receiving-end device may be divided into functional modules according to the foregoing method examples.
  • each functional module may be divided corresponding to each function, or two or more functions may be integrated into one processing module. middle.
  • the above-mentioned integrated modules can be implemented in the form of hardware, and can also be implemented in the form of software function modules. It should be noted that, the division of modules in the embodiments of the present application is schematic, and is only a logical function division, and there may be other division manners in actual implementation. The following description will be given by taking as an example that each function module is divided corresponding to each function.
  • FIG. 6 is a schematic structural diagram of a communication device 200 .
  • the communication apparatus includes a processing unit 210, a sending unit 220, and a receiving unit 230.
  • the communication apparatus 200 may be the first terminal device or the second terminal device in the above method embodiments, or may be used to implement the above method embodiments
  • the communication apparatus 200 may correspond to the first terminal device or the second terminal device in the method 100 according to the embodiment of the present application, and the communication apparatus 200 may include the first terminal device or the second terminal device for executing the first terminal device or the second terminal device in FIG. 5 .
  • each unit in the communication apparatus 200 and the above-mentioned other operations and/or functions respectively implement the corresponding flow of the method 100 in FIG. 5 .
  • the communication apparatus 200 may implement any function possessed by the first terminal device in the embodiment shown in FIG. 5 .
  • the processing unit 210 is configured to determine a first resource, where the first resource is a resource reserved by the first terminal for sending sideline information.
  • the processing unit is configured to determine the location of the first resource and the location of the second resource in the first resource.
  • the processing unit 210 is further configured to determine a first resource according to second information, where the second information includes request information for requesting a resource for the second terminal to send sideline information, and/or, the second terminal's Resource requirement information, such as the size of physical resources specifically required by the second terminal, or the number of bits of data to be sent by the second terminal, etc., that is, the processing unit is further configured to request information for sideline transmission resources according to the second terminal determining the first resource, and/or the processing unit is further configured to determine the first resource according to the resource requirement information of the second terminal.
  • the second information includes request information for requesting a resource for the second terminal to send sideline information, and/or, the second terminal's Resource requirement information, such as the size of physical resources specifically required by the second terminal, or the number of bits of data to be sent by the second terminal, etc.
  • the resource request information includes a service request (service requirement, SR) and/or a buffer state report (buffer state report, BSR).
  • service requirement service requirement
  • BSR buffer state report
  • the processing unit 210 is further configured to determine according to the size of resources used to carry third information, where the third information is resource request information and/or a buffer status report.
  • the second resource is determined according to third information
  • the third information is a service request (service requirement, SR) or a buffer state report (buffer state report, BSR)
  • the second resource determined according to the third information is The preset resource requirement negotiated after the first terminal and the second terminal establish a sidelink connection, where the preset resource requirement includes the size of the periodic resource for the second terminal to send the sidelink data.
  • the second resource is determined according to the number of bits of the resource request information and/or the buffer status report, or according to the size of the resource for sending the resource request information and/or the buffer status report.
  • the preset resource requirement may be that the first terminal sends indication information to the second terminal with a period of P ms, where P is a positive integer, and the indication information is used to indicate the size and location of physical resources, and the physical The size of the resource is the default size negotiated by the two parties.
  • a sending unit 220 configured to send first information, where the first information is used to indicate a second resource, the second resource is used for the second terminal to send sideline information, and the second resource is the first resource subset of .
  • the first resource includes a first reserved resource and/or a second reserved resource
  • the first reserved resource is a resource determined through resource reservation method 1, that is, a periodically reserved resource.
  • the second reserved resource is the resource determined by the resource reservation method 2, that is, the resource indicated by TRIV and FRIV, and the reserved resource refers to the time-frequency reserved resource determined in advance for the data to be sent.
  • the first information includes indication information used to instruct the second terminal to use the second resource to send sideline information.
  • the sending unit 220 is configured to send an indication of the The second terminal sends the indication information of the sideline information by using the second resource.
  • the sideline information sent by the above-mentioned second terminal includes control information and/or data, for example, service request (service requirement, SR), buffer state report (buffer state report, BSR) of the second terminal, second terminal Data to be sent on the terminal, etc.
  • the second terminal may use the second resource to send sideline information to the first terminal, or may use the second resource to send sideline information to other terminals, which is not limited in this application.
  • the first information includes shared allocation information
  • the shared allocation information is used to determine the position of the second resource in the first resource.
  • the sending unit 220 is configured to: The shared allocation information is sent.
  • the shared allocation information indicates a resource in the first resource for the first terminal to send sideline information to the second terminal, and a resource in the first resource for the second terminal to send the sideline information resource, that is, the second resource, the second terminal receives the sidelink information sent by the first terminal on the resource where the first terminal sends the sidelink information to the second terminal in the first resource, and sends the sidelink information to the first terminal and/or the second terminal on the second resource. Or other terminals except the first terminal send sideline information.
  • the specific location in the time-frequency domain of the sending and receiving resources of the second terminal can be determined by the first terminal, so that the second terminal can save unnecessary monitoring energy consumption.
  • the second terminal since the second terminal has only one communication peer, the second terminal can Only the time slot corresponding to the second resource is received, thereby reducing the energy consumption of blind reception and realizing energy saving.
  • a receiving unit 230 configured to receive second information, where the second information is used to request resources for the second terminal to send sideline information.
  • the second information includes resource request information of the second terminal, and the resource request information is used to trigger the first terminal to determine the first resource.
  • the resource request information is a service request (service requirement, SR).
  • the second information includes resource requirement information of the second terminal, such as the size of physical resources specifically required by the second terminal, or the number of bits of data to be sent by the second terminal, etc., as By way of example and not limitation, the resource requirement information includes a buffer state report (BSR).
  • BSR buffer state report
  • the receiving unit 230 is further configured to receive third information, where the third information includes resource request information and/or a buffer status report.
  • the communication apparatus 200 may implement any function possessed by the second terminal device in the embodiment shown in FIG. 5 .
  • the processing unit 210 is configured to determine a second resource according to the first information, where the first resource is a resource reserved by the first terminal for sending sideline information, and the first information is sent by the first terminal to indicate Information about the second resource.
  • the processing unit 210 is configured to determine the location of the first resource and the location of the second resource in the first resource according to the first information.
  • a sending unit 220 configured to send second information, where the second information is used to request resources for the second terminal to send sideline information.
  • the second information includes request information for requesting resources for the second terminal to send sideline information, and/or resource requirement information of the second terminal, such as the second terminal The size of physical resources specifically required by the terminal, or the number of bits of data to be sent by the second terminal, etc., that is, the processing unit is further configured to determine the first resource according to the request information of the second terminal for requesting sideline transmission resources, and/ Or the processing unit is further configured to determine the first resource according to the resource requirement information of the second terminal.
  • the resource request information includes a service request (service requirement, SR) and/or a buffer state report (buffer state report, BSR).
  • service requirement service requirement
  • BSR buffer state report
  • a receiving unit 230 configured to receive first information, where the first information is used to indicate a second resource, the second resource is used for the second terminal to send sideline information, and the second resource is a sub-section of the first resource set, the first resource is a resource reserved by the first terminal for sending sideline information.
  • the first resource includes a first reserved resource and/or a second reserved resource
  • the first reserved resource is a resource determined through resource reservation method 1, that is, a periodically reserved resource.
  • the second reserved resource is the resource determined by the resource reservation method 2, that is, the resource indicated by TRIV and FRIV, and the reserved resource refers to the time-frequency reserved resource determined in advance for the data to be sent.
  • the first information includes indication information used to instruct the second terminal to use the second resource to send sideline information.
  • the receiving unit 230 is configured to receive the indication that the The second terminal sends the indication information of the sideline information by using the second resource.
  • the sideline information includes control information and/or data, for example, a service request (SR) of the second terminal, a buffer state report (BSR), a to-be-sent on the second terminal
  • SR service request
  • BSR buffer state report
  • the second terminal may use the second resource to send sideline information to the first terminal, and may also use the second resource to send sideline information to other terminals, which is not limited in this application.
  • the first information includes shared allocation information
  • the shared allocation information is used to determine the location of the second resource in the first resource.
  • the receiving unit 230 is configured to: The shared allocation information is received.
  • the shared allocation information indicates a resource in the first resource for the first terminal to send sideline information to the second terminal, and a resource in the first resource for the second terminal to send the sideline information resource, that is, the second resource, the second terminal receives the sidelink information sent by the first terminal on the resource where the first terminal sends the sidelink information to the second terminal in the first resource, and sends the sidelink information to the first terminal and/or the second terminal on the second resource. Or other terminals except the first terminal send sideline information.
  • the specific location in the time-frequency domain of the sending and receiving resources of the second terminal can be determined by the first terminal, so that the second terminal can save unnecessary monitoring energy consumption.
  • the second terminal since the second terminal has only one communication peer, the second terminal can Only the time slot corresponding to the second resource is received, thereby reducing the energy consumption of blind reception and realizing energy saving.
  • FIG. 7 is a structural block diagram of a communication device 300 provided according to an embodiment of the present application.
  • the communication device 300 shown in FIG. 7 includes: a processor 310 , a memory 320 and a transceiver 330 .
  • the processor 310 is coupled to the memory for executing instructions stored in the memory to control the transceiver 330 to transmit and/or receive signals.
  • processor 310 and the memory 330 may be combined into one processing device, and the processor 310 is configured to execute the program codes stored in the memory 330 to realize the above-mentioned functions.
  • the memory 330 may also be integrated in the processor 310 or independent of the processor 310 .
  • transceiver 320 may include a receiver (or, receiver) and a transmitter (or, transmitter). The transceiver may further include antennas, and the number of the antennas may be one or more. Transceiver 320 may be a communication interface or interface circuit.
  • the communication device 300 may be the first terminal device or the second terminal device in the above method embodiments, or may be used to implement the first terminal device or the second terminal device in the above method embodiments A chip that functions as a terminal device.
  • the communication device 300 may correspond to the first terminal device and the second terminal device in the method 100 according to the embodiment of the present application, and the communication device 300 may include the first terminal device and the second terminal device for executing the first terminal device and the second terminal device in FIG. 5 .
  • each unit in the communication device 300 and the above-mentioned other operations and/or functions are respectively for realizing the corresponding flow of the method 100 . It should be understood that the specific process of each unit performing the above-mentioned corresponding steps has been described in detail in the above-mentioned method embodiments, and for the sake of brevity, it will not be repeated here.
  • the chip When the communication device 300 is a chip, the chip includes a transceiver unit and a processing unit.
  • the transceiver unit may be an input/output circuit or a communication interface;
  • the processing unit may be a processor, a microprocessor or an integrated circuit integrated on the chip.
  • the embodiment of the present application also provides a processing apparatus, including a processor and an interface.
  • the processor may be used to execute the methods in the above method embodiments.
  • the method implemented by the communication device may also be implemented by a component (for example, a chip or a circuit) that can be configured inside the communication device.
  • various aspects or features of the present application may be implemented as a method, apparatus, or article of manufacture using standard programming and/or engineering techniques.
  • article of manufacture encompasses a computer program accessible from any computer readable device, carrier or medium.
  • computer readable media may include, but are not limited to: magnetic storage devices (eg, hard disks, floppy disks, or magnetic tapes, etc.), optical disks (eg, compact discs (CDs), digital versatile discs (DVDs) etc.), smart cards and flash memory devices (eg, erasable programmable read-only memory (EPROM), card, stick or key drives, etc.).
  • various storage media described herein can represent one or more devices and/or other machine-readable media for storing information.
  • the term "machine-readable medium” may include, but is not limited to, wireless channels and various other media capable of storing, containing, and/or carrying instructions and/or data.
  • a component may be, but is not limited to, a process running on a processor, a processor, an object, an executable, a thread of execution, a program, and/or a computer.
  • an application running on a computing device and the computing device may be components.
  • One or more components may reside within a process and/or thread of execution, and a component may be localized on one computer and/or distributed between 2 or more computers.
  • these components can execute from various computer readable media having various data structures stored thereon.
  • a component may, for example, be based on a signal having one or more data packets (eg, data from two components interacting with another component between a local system, a distributed system, and/or a network, such as the Internet interacting with other systems via signals) Communicate through local and/or remote processes.
  • data packets eg, data from two components interacting with another component between a local system, a distributed system, and/or a network, such as the Internet interacting with other systems via signals
  • the disclosed system, apparatus and method may be implemented in other manners.
  • the apparatus embodiments described above are only illustrative.
  • the division of the units is only a logical function division. In actual implementation, there may be other division methods.
  • multiple units or components may be combined or Can be integrated into another system, or some features can be ignored, or not implemented.
  • the shown or discussed mutual coupling or direct coupling or communication connection may be through some interfaces, indirect coupling or communication connection of devices or units, and may be in electrical, mechanical or other forms.
  • the units described as separate components may or may not be physically separated, and components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution in this embodiment.
  • each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically alone, or two or more units may be integrated into one unit.
  • the functions, if implemented in the form of software functional units and sold or used as independent products, may be stored in a computer-readable storage medium.
  • the technical solution of the present application can be embodied in the form of a software product in essence, or the part that contributes to the prior art or the part of the technical solution.
  • the computer software product is stored in a storage medium, including Several instructions are used to cause a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present application.
  • the aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (Read-Only Memory, ROM), random access memory (Random Access Memory, RAM), magnetic disk or optical disk and other media that can store program codes .

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

L'invention concerne un procédé de communication et un appareil de communication, pouvant s'appliquer à un internet de véhicules tels que V2X et LTE-V, ou pouvant être appliqués à des domaines tels que la conduite intelligente et des véhicules intelligents connectés. Le procédé de communication comprend les étapes suivantes: un premier terminal détermine une première ressource, la première ressource étant une ressource réservée par un premier terminal pour le premier terminal et un second terminal pour transmettre une information de liaison latérale; et le premier terminal transmet une première information pour indiquer une seconde ressource au second terminal, la seconde ressource étant utilisée pour que le second terminal transmette l'information de liaison latérale du second terminal, et la seconde ressource étant un sous-ensemble de la première ressource. Le procédé selon des modes de réalisation de la présente invention permet de réaliser le partage de ressources réservées entre différents terminaux, permettant ainsi d'assurer la fiabilité des ressources, et d'obtenir une conservation d'énergie.
PCT/CN2020/142601 2020-12-31 2020-12-31 Procédé de communication et appareil de communication Ceased WO2022141608A1 (fr)

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