WO2022252231A1 - 用于时间同步的方法、终端设备和网络设备 - Google Patents

用于时间同步的方法、终端设备和网络设备 Download PDF

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Publication number
WO2022252231A1
WO2022252231A1 PCT/CN2021/098463 CN2021098463W WO2022252231A1 WO 2022252231 A1 WO2022252231 A1 WO 2022252231A1 CN 2021098463 W CN2021098463 W CN 2021098463W WO 2022252231 A1 WO2022252231 A1 WO 2022252231A1
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WIPO (PCT)
Prior art keywords
propagation delay
delay compensation
information
terminal device
target
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PCT/CN2021/098463
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English (en)
French (fr)
Inventor
梁彬
付喆
Original Assignee
Oppo广东移动通信有限公司
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.)
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Publication date
Application filed by Oppo广东移动通信有限公司 filed Critical Oppo广东移动通信有限公司
Priority to PCT/CN2021/098463 priority Critical patent/WO2022252231A1/zh
Priority to EP21943592.2A priority patent/EP4340473A1/en
Priority to CN202180093769.0A priority patent/CN116868636A/zh
Publication of WO2022252231A1 publication Critical patent/WO2022252231A1/zh
Priority to US18/527,216 priority patent/US20240098672A1/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W56/00—Synchronisation arrangements
    • H04W56/004—Synchronisation arrangements compensating for timing error of reception due to propagation delay
    • H04W56/0045—Synchronisation arrangements compensating for timing error of reception due to propagation delay compensating for timing error by altering transmission time
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W56/00—Synchronisation arrangements
    • H04W56/004—Synchronisation arrangements compensating for timing error of reception due to propagation delay
    • H04W56/005—Synchronisation arrangements compensating for timing error of reception due to propagation delay compensating for timing error by adjustment in the receiver

Definitions

  • the present application relates to the technical field of communication, and in particular to a method for time synchronization, a terminal device and a network device.
  • time synchronization is required between terminal equipment and network equipment to achieve reliable data transmission.
  • terminal devices and network devices can implement time synchronization by performing propagation delay compensation operations, but based on current communication standards, it is up to the terminal devices to decide whether to perform propagation delay compensation operations, which cannot guarantee the time synchronization accuracy requirements of different business scenarios , resulting in the inability to meet the reliability requirements of data transmission in different business scenarios.
  • the embodiment of the present application provides a method for time synchronization, a terminal device and a network device, which can determine the propagation delay compensation method to be used based on the signaling interaction between the terminal device and the network device, thereby ensuring time synchronization in different business scenarios Accuracy requirements, so as to meet the reliability requirements of data transmission in different business scenarios.
  • the embodiment of the present application provides a method for time synchronization, which is applied to a terminal device, and the method includes:
  • the target propagation delay compensation mode is one of the propagation delay compensation modes supported by the terminal device, or the target propagation delay compensation mode is a propagation delay compensation mode determined by the terminal device itself.
  • the embodiment of the present application provides a method for time synchronization, which is applied to a network device, and the method includes:
  • the target propagation delay compensation mode is one of the propagation delay compensation modes supported by the terminal device, or the target propagation delay compensation mode is a propagation delay compensation mode determined by the terminal device itself.
  • an embodiment of the present application provides a terminal device, where the terminal device includes:
  • a transceiver module configured to send first information to a network device, where the first information is used to indicate a propagation delay compensation mode supported by the terminal device;
  • the transceiver module is further configured to receive second information from the network device;
  • a processing module configured to perform propagation delay compensation according to a target propagation delay compensation manner related to the second information
  • the target propagation delay compensation mode is one of the propagation delay compensation modes supported by the terminal device, or the target propagation delay compensation mode is a propagation delay compensation mode determined by the terminal device itself.
  • the embodiment of the present application provides a network device, and the network device includes:
  • a receiving module configured to receive first information from a terminal device, where the first information is used to indicate a propagation delay compensation mode supported by the terminal device;
  • a sending module configured to send second information to the terminal device, where the second information is used by the terminal device to perform propagation delay compensation according to a target propagation delay compensation method related to the second information;
  • the target propagation delay compensation mode is one of the propagation delay compensation modes supported by the terminal device, or the target propagation delay compensation mode is a propagation delay compensation mode determined by the terminal device itself.
  • a terminal device in the fifth aspect, is characterized in that it includes a processor, a memory, a communication interface, and one or more programs, the one or more programs are stored in the memory, and the The processor executes the one or more programs so that the terminal device executes the method for time synchronization described in the first aspect.
  • the embodiment of the present application provides a network device, including a processor, a memory, a communication interface, and one or more programs, the one or more programs are stored in the memory, and the processor executes The one or more programs enable the network device to execute the method for time synchronization described in the second aspect.
  • an embodiment of the present application provides a communication system, where the system includes the above-mentioned terminal device and/or network device.
  • the system may further include other devices that interact with the terminal device or network device in the solutions provided by the embodiments of the present application.
  • the embodiment of the present application provides a computer-readable storage medium, the computer-readable storage medium stores a computer program, and the computer program enables the terminal device to execute the time-based method according to the first aspect of the embodiment of the present application Synchronize some or all of the steps described in the method.
  • the embodiment of the present application provides a computer-readable storage medium, the computer-readable storage medium stores a computer program, and the computer program enables the network device to execute the method for time-use according to the second aspect of the embodiment of the present application Synchronize some or all of the steps described in the method.
  • the embodiment of the present application provides a computer program product, wherein the computer program product includes a non-transitory computer-readable storage medium storing a computer program, and the computer program is operable to enable the terminal device to execute Part or all of the steps described in the method for time synchronization in the first aspect of the embodiment of the present application.
  • the computer program product may be a software installation package.
  • the embodiment of the present application provides a computer program product, wherein the computer program product includes a non-transitory computer-readable storage medium storing a computer program, and the computer program is operable to cause a network device to execute Part or all of the steps described in the method for time synchronization in the second aspect of the embodiment of the present application.
  • the computer program product may be a software installation package.
  • the embodiment of the present application provides a chip, the chip includes a memory and a processor, and the processor can call and run a computer program from the memory, so as to realize the time synchronization in the first aspect or the second aspect Some or all of the steps described in the method.
  • the terminal device sends information indicating the propagation delay compensation mode supported by the terminal device to the network device, and after receiving the second information sent by the network device, according to the target information related to the second information
  • the propagation delay compensation mode performs propagation delay compensation
  • the target propagation delay compensation mode related to the second information is one of the propagation delay compensation modes supported by the terminal device or a propagation delay compensation mode determined by the terminal device itself.
  • the terminal device can determine the propagation delay compensation method to be used according to the information issued by the network device, and perform propagation delay compensation according to the propagation delay compensation method, which can ensure different Business scenarios require time synchronization accuracy to meet the requirements of different business scenarios for data transmission reliability.
  • FIG. 1 is an architecture diagram of a communication system provided by an embodiment of the present application.
  • FIG. 2 is a system architecture diagram of a time-sensitive network TSN provided by an embodiment of the present application.
  • Fig. 3 is a schematic flowchart of a method for time synchronization provided by an embodiment of the present application.
  • Fig. 4 is another schematic flowchart of the method for time synchronization provided by the embodiment of the present application.
  • Fig. 5 is another schematic flowchart of the method for time synchronization provided by the embodiment of the present application.
  • Fig. 6 is a schematic flowchart of an example of a method for time synchronization provided by an embodiment of the present application.
  • Fig. 7 is a schematic flowchart of another example of the method for time synchronization provided by the embodiment of the present application.
  • Fig. 8 is a schematic flowchart of another example of the method for time synchronization provided by the embodiment of the present application.
  • Fig. 9 is a schematic flowchart of another example of the method for time synchronization provided by the embodiment of the present application.
  • Fig. 10 is a schematic flowchart of another example of the method for time synchronization provided by the embodiment of the present application.
  • Fig. 11 is a schematic flowchart of another example of the method for time synchronization provided by the embodiment of the present application.
  • Fig. 12 is a schematic flowchart of another example of the method for time synchronization provided by the embodiment of the present application.
  • Fig. 13 is a schematic flowchart of another example of the method for time synchronization provided by the embodiment of the present application.
  • Fig. 14 is a schematic flowchart of a method for time synchronization according to another embodiment of the present application.
  • FIG. 15 is a schematic structural diagram of a terminal device according to an embodiment of the present application.
  • FIG. 16 is a schematic structural diagram of a network device according to an embodiment of the present application.
  • Fig. 17 is a schematic structural diagram of a terminal device according to another embodiment of the present application.
  • Fig. 18 is a schematic structural diagram of a network device according to another embodiment of the present application.
  • FIG. 19 is a schematic structural diagram of a chip according to an embodiment of the present application.
  • FIG. 20 is a schematic diagram of a communication system according to an embodiment of the present application.
  • time-sensitive network Time Sensitive Network
  • time-sensitive communication Time Sensitive Communication
  • TSC Time Sensitive Communication
  • 5G fifth generation mobile communication
  • the system may be called a New Radio (New Radio, NR) system, a Long Term Evolution (Long Term Evolution, LTE) system, or the like.
  • FIG. 1 is an architecture diagram of a communication system provided by this application.
  • the communication system may include: one or more network devices 101 , and one or more terminal devices 102 , and FIG. 1 only shows one network device 101 and one terminal device 102 as an example.
  • Data transmission can be performed between the network device 101 and the terminal device 102 .
  • time synchronization between the terminal device 102 and the network device 101 needs to be performed.
  • the TSN system may include a TSN bridge or a TSN bridge (TSN bridge), a device side (Device) TSN conversion device (TSN Translator), a 5G system (5GS), and a network side bridge (Network side of Bridge) And TSN system (TSN System).
  • TSN bridge TSN bridge
  • TSN Translator device side TSN conversion device
  • 5GS 5G system
  • TSN System Network side of Bridge
  • the TSN bridge can be a terminal station, a terminal station, an end station (End Station), etc.
  • the 5GS can include terminal equipment such as user equipment (User Equipment, UE), (wireless (Raddio, R)) access network ( Access Network, AN), access and mobility management entity (Access and Mobility Management Function, AMF), session management function entity (Session Management Function, SMF), unified data management entity (Unified Data Management, UDM), user plane function entity (User Plane Function, UPF), policy and charging function entity (Policy and Charging Function, PCF), network exposure function entity (Network Exposure Function, NEF) and other network elements;
  • the Network side of Bridge may include the control plane (Control Plane, CP) TSN conversion equipment such as application function (Network Exposure Function, AF), and user plane (User Plane, UP) TSN conversion equipment;
  • the TSN System may include TSN centralized user configuration (Centralized User Configuration, GUC), TSN centralized Network elements such as Centralized Network
  • (R)AN may include a network device such as a base station, the device side TSN Translator and the UE are network elements in a device side bridge (Device side of Bridge).
  • the 5G network can be used as a TSN bridge to provide services for the TSN network and services through the 5G network.
  • a network device may be an entity on the network side for sending or receiving information, such as a base station, which may be used to communicate with one or more terminal devices, and may also be used to communicate with a or multiple base stations with partial terminal functions (such as communication between a macro base station and a micro base station, such as communication between access points).
  • the base station can be a base transceiver station (Base Transceiver Station, BTS), or an evolved base station (Evolutional Node B, eNB) in a long-term evolution (Long Term Evolution, LTE) system, or a base station gNB in an NR system. Wait, I won't list them all here.
  • the network device 101 can also be a transmission point (Transmission Point, TP), an access point (Access Point, AP), a sending and receiving point (Transmission and Receiver Point, TRP), a relay device, a central unit (Central Unit, CU ), or other network devices with base station functions, etc., which are not limited in this embodiment of the present application.
  • TP Transmission Point
  • AP Access Point
  • AP Access Point
  • TRP Transmission and Receiver Point
  • relay device a central unit
  • Central Unit, CU central unit
  • other network devices with base station functions, etc. which are not limited in this embodiment of the present application.
  • the terminal device is a device with a communication function, such as a vehicle-mounted device, a wearable device, a handheld device (such as a smart phone), and the like.
  • the terminal equipment can also be called other names, such as user equipment (User Equipment, UE), subscriber unit, mobile station (Mobile Station, MS), mobile unit (Mobile Unit, MU), etc., the embodiment of the present application does not do this limited.
  • time synchronization may also be referred to as synchronization, clock synchronization, etc., which is not limited in the embodiment of the present application.
  • serial numbers of the processes do not mean the order of execution, and the execution order of the processes should be determined by their functions and internal logic, rather than by the implementation order of the embodiments of the present application.
  • the implementation process constitutes no limitation.
  • FIG. 3 is a schematic flowchart of a method for time synchronization provided by an embodiment of the present application.
  • the method for time synchronization in this embodiment can be applied to the above-mentioned communication system, and can be specifically applied to the above-mentioned terminal device. As shown in Figure 3, the method includes:
  • S310 Send first information to the network device, where the first information is used to indicate a propagation delay compensation mode supported by the terminal device.
  • the terminal device may send capability information (Capability Information) to the network device, and report the propagation delay compensation mode supported by itself to the network device through the capability information.
  • Capability Information Capability Information
  • the propagation delay compensation mode supported by the terminal device may be one propagation delay compensation mode, or may be multiple propagation delay compensation modes.
  • the propagation delay compensation modes supported by the terminal device include at least one of a first propagation delay compensation mode and a second propagation delay compensation mode.
  • the first propagation delay compensation method is a delay compensation method based on Time Advance (TA)
  • the second propagation delay compensation method is a delay compensation method based on Round-Trip Time (RTT).
  • TA Time Advance
  • RTT Round-Trip Time
  • the capabilities of terminal devices can be divided into three types. Terminal devices with capability 1 only support TA-based delay compensation methods, and have the capability Terminal devices with capability 2 only support the RTT-based delay compensation method. Terminal devices with capability 3 support both TA-based and RTT-based delay compensation methods. Terminal devices can pass the The value indicates the capability of the terminal device, and further indicates the delay compensation mode supported by the terminal device.
  • the terminal device receives second information from the network device.
  • the second information is determined by the network device based on the first information sent by the terminal device.
  • the target propagation delay compensation mode is one of the propagation delay compensation modes supported by the terminal device, or the target propagation delay compensation mode is a propagation delay compensation mode determined by the terminal device itself.
  • the self-determined propagation delay compensation method of the terminal device can be understood as the propagation delay compensation process implemented by the terminal device itself, and the terminal device may or may not perform propagation delay compensation. Or it can be understood that the propagation delay compensation process defined by the current communication standard version is not performed, and the terminal device implements the propagation delay compensation process by itself, and the terminal device may or may not perform propagation delay compensation.
  • the terminal device sends information indicating the propagation delay compensation mode supported by the terminal device to the network device, and after receiving the second information sent by the network device, according to the second information
  • the relevant target propagation delay compensation method performs propagation delay compensation, and the target propagation delay compensation method related to the second information is one of the propagation delay compensation methods supported by the terminal device or the propagation delay is determined by the terminal device itself Compensation method.
  • the terminal device can determine the propagation delay compensation method to be used according to the information issued by the network device, and perform propagation delay compensation according to the propagation delay compensation method, which can ensure different Business scenarios require time synchronization accuracy to meet the requirements of different business scenarios for data transmission reliability.
  • the terminal device performs the propagation delay compensation process. If the propagation delay compensation process is to be performed by the network device, the network device performs Propagation delay compensation is performed to realize time synchronization between terminal equipment and network equipment.
  • the target propagation delay compensation method in S330 is one of the propagation delay compensation methods requested by the terminal device among the propagation delay compensation methods supported by the terminal device; in this Under the circumstances, as shown in Figure 4, before S320, the method shown in Figure 3 also includes:
  • S340 Send third information to the network device, where the third information is used by the network device to determine the propagation delay compensation mode requested by the terminal device.
  • the terminal device after the terminal device sends the network device indicating that it supports propagation delay compensation, and before receiving the second information sent by the network device, the terminal device notifies the network device by sending the third information to the network device that the terminal device requests The propagation delay compensation method used.
  • the terminal device can determine a more appropriate delay compensation method for the current business scenario based on these information, and can guarantee different business Scenarios require time synchronization accuracy to meet the requirements of different business scenarios for data transmission reliability.
  • the terminal device supports the TA-based delay compensation method and the RTT-based delay compensation method, and the terminal device informs the network device that the terminal device requests to use the TA-based delay compensation method through the third information, or informs the network device that the The terminal device requests to use the RTT-based delay compensation method.
  • the third information indicates the target propagation delay compensation mode.
  • the propagation delay compensation mode requested by the terminal device is the propagation delay compensation mode related to the second information.
  • the network device determines the second information based on the first information and the third information sent by the terminal device.
  • the second information in S320 is used to trigger the terminal device to perform propagation delay compensation.
  • the fact that the second information is used to trigger the terminal device to perform propagation delay compensation may also be understood as that the second information is used to instruct the terminal device to perform propagation delay compensation.
  • a manner in which the second information is used to trigger the terminal device to perform propagation delay compensation may be to trigger the terminal device to perform propagation delay compensation by indicating a target propagation delay compensation manner.
  • the second information includes first propagation delay compensation mode indication information, and the first propagation delay mode indication information is used to indicate the target propagation delay compensation mode.
  • the network device sends second information to the terminal device, where the second information indicates a target propagation delay compensation manner.
  • the terminal device sends the third information to the network device, and after receiving the third information, the network device sends the second information to the terminal device, and the second information is used to indicate the target propagation delay Compensation method.
  • the terminal device After receiving the second information, the terminal device performs propagation delay compensation based on the target propagation delay compensation manner. If the second information received by the subsequent terminal device indicates that the terminal device uses other propagation delay compensation methods to perform propagation delay compensation, the terminal device performs propagation delay compensation based on the propagation delay compensation method indicated by the latest received second information .
  • the second information only includes the first propagation delay compensation mode indication information
  • the second information and the first propagation delay compensation mode indication information are essentially the same piece of information.
  • the second information may be used to trigger the terminal device to perform propagation delay compensation.
  • the second information in S320 may include first compensation amount information, and the first compensation amount information is used by the terminal device to determine the compensation amount corresponding to the target propagation delay compensation mode.
  • the network device sends the second information to the terminal device, and the second information triggers the terminal device to use the target propagation delay compensation method to perform propagation delay compensation, and at the same time, in the second information
  • the first compensation amount information is included, and the terminal device determines the compensation amount corresponding to the target propagation delay compensation method according to the first compensation amount information, and then implements propagation compensation through the target propagation delay compensation method.
  • the terminal device sends the third information to the network device, and after receiving the third information, the network device sends the second information to the terminal device, and the second information is used to indicate the target propagation delay
  • the compensation method includes the first compensation amount information in the second information, and the terminal device determines the compensation amount corresponding to the target propagation delay compensation method according to the first compensation amount information, and then realizes propagation delay compensation through the target propagation delay compensation method.
  • the terminal equipment can determine both the target propagation delay compensation mode and the target propagation delay compensation mode, which can simplify the implementation of the network equipment and the terminal equipment.
  • the second information may not include the first compensation amount information.
  • the network device may send other information so that the terminal device determines the compensation amount corresponding to the target propagation delay compensation mode according to other information. It can be understood that the compensation amount corresponding to each propagation delay compensation period may change, so the information used for the terminal device to determine the compensation amount will be sent more frequently than the information used to indicate the target propagation delay compensation method. Different information is used to indicate the target propagation delay compensation mode and compensation amount (explicit indication or implicit indication), which can reduce signaling overhead.
  • the compensation amount corresponding to the target propagation delay compensation mode is the TA estimated value. If the target propagation delay compensation mode is an RTT-based delay compensation mode, the compensation amount corresponding to the target propagation delay compensation mode is the RTT measurement value. It can be understood that if the propagation delay compensation is performed by the network device, the second information does not include the first compensation amount information, and the terminal device sends the RTT measurement value to the network device after receiving the second information, and the network device based on the terminal The RTT measurement value sent by the device is used for propagation delay compensation.
  • the second information in S320 is used to trigger the terminal device to perform propagation delay compensation.
  • the method shown in FIG. 3 also includes:
  • S350 Receive fourth information from the network device, where the fourth information includes second propagation delay compensation mode indication information, and the second propagation delay compensation mode indication information is used to indicate a target propagation delay compensation mode.
  • the network device may indicate the target propagation delay compensation mode by sending the fourth information to the terminal device.
  • the fourth information may further include second compensation amount information, and the second compensation amount information is used by the terminal device to determine the compensation amount corresponding to the target propagation delay compensation mode.
  • the terminal equipment can determine both the target propagation delay compensation mode and the target propagation delay compensation mode, which can simplify the implementation of the network equipment and the terminal equipment.
  • the fourth information may not include the second compensation amount information.
  • the network device may send other information so that the terminal device determines the compensation amount corresponding to the target propagation delay compensation mode according to other information. It can be understood that the compensation amount corresponding to each propagation delay compensation period may change, so the information used for the terminal device to determine the compensation amount will be sent more frequently than the information used to indicate the target propagation delay compensation method. Different information is used to indicate the target propagation delay compensation mode and compensation amount (explicit indication or implicit indication), which can reduce signaling overhead.
  • the method for time synchronization in the embodiment of the present application further includes:
  • the fifth information from the network device is received, where the fifth information is used to configure an available propagation delay compensation mode of the terminal device, and the available propagation delay compensation mode includes a target propagation delay compensation mode.
  • the network device determines the available propagation delay compensation mode of the terminal device based on the first information, and uses the available propagation delay compensation mode of the terminal device
  • the delay compensation mode is configured for the terminal equipment.
  • the terminal device sends to the network device third information for the network device to determine the propagation delay compensation mode requested by the terminal device, The network device determines an available propagation delay compensation mode of the terminal device based on the first information and the third information, and configures the available propagation delay compensation mode of the terminal device to the terminal device.
  • the available propagation delay compensation method of the terminal device is determined by the network device based on the capability of the terminal device or by the network device based on the capability and request of the terminal device, which can guarantee the time synchronization accuracy requirements of different business scenarios, so as to meet the data transmission requirements of different business scenarios The need for reliability.
  • the terminal device supports the TA-based delay compensation method and the RTT-based delay compensation method. If the terminal device requests to use the TA-based delay compensation method, the network device configures the available propagation delay compensation method of the terminal device as Delay compensation mode of TA. If the terminal device requests to use the RTT-based delay compensation mode, the network device configures the available propagation delay compensation mode of the terminal device as the RTT-based delay compensation mode. If the terminal device has no information for the network device to determine the propagation delay compensation mode requested by the terminal device, the network device may configure the terminal device to use the TA-based delay compensation mode or the RTT-based delay compensation mode based on its own implementation.
  • the available propagation delay compensation mode of the terminal device configured by the network device may be one or multiple, and if the available propagation delay compensation mode configured by the network device is multiple, the network device may indicate through other information
  • the target propagation delay compensation mode may, for example, indicate the target propagation delay compensation mode through the above-mentioned second information.
  • the fifth information above also includes at least one item of propagation delay compensation cycle information and time offset information.
  • the propagation delay compensation period information is used for the terminal device to determine the time interval (period) for performing propagation delay compensation
  • the time offset information is used for the terminal device to determine the time for propagation delay compensation (which can be understood as the time). For example, if the propagation delay compensation period information indicates that the time interval for propagation delay compensation is 20ms and the time offset is 5ms, then the terminal device performs propagation delay compensation every 20ms, and the time to perform propagation delay compensation is every 20ms 5ms after the beginning of the period.
  • the second information in S320 is used to configure an available propagation delay compensation mode of the terminal device, where the available propagation delay compensation mode includes a target propagation delay compensation mode.
  • the network device sends second information to the terminal device, and the second information configures an available propagation delay compensation mode of the terminal device.
  • the terminal device sends to the network device third information for the network device to determine the propagation delay compensation method requested by the terminal device, and then the network device sends the second information to the terminal device, through the third information
  • the second information configures the available propagation delay compensation mode of the terminal equipment.
  • the available propagation delay compensation mode of the terminal device configured by the network device through the second information may be one or multiple, and if the network device configures multiple available propagation delay compensation modes, the network device may Indicates the target propagation delay compensation method through other information.
  • the second information when the second information is used to configure available propagation delay compensation modes of the terminal device, the second information further includes at least one item of propagation delay compensation period information and time offset information.
  • the propagation delay compensation period information is used for the terminal device to determine the time interval (period) for performing propagation delay compensation
  • the time offset information is used for the terminal device to determine the time for propagation delay compensation (which can be understood as the time). For example, if the propagation delay compensation period information indicates that the time interval for propagation delay compensation is 20ms and the time offset is 5ms, then the terminal device performs propagation delay compensation every 20ms, and the time to perform propagation delay compensation is every 20ms 5ms after the beginning of the period.
  • the target propagation delay compensation method is one of the propagation delay compensation methods supported by the terminal device
  • the second information configuration can be The propagation delay compensation mode is the target propagation delay compensation mode.
  • the network device may configure the target propagation delay compensation mode used by the terminal device to perform propagation delay compensation through the second information.
  • the target propagation delay compensation method is a TA-based delay compensation method
  • the terminal device indicates through the first information that the propagation delay compensation method supported by the terminal device is a TA-based delay compensation method
  • the network device uses the second information Configure the terminal device to use the TA-based delay compensation method to perform propagation delay compensation.
  • the terminal device indicates through the first information that the propagation delay compensation methods supported by the terminal device include a TA-based delay compensation method and an RTT-based delay compensation method, and the network device configures the terminal device to use the RTT-based time delay compensation method through the second information.
  • the delay compensation method is used to compensate the propagation delay.
  • the terminal device indicates through the first information that the propagation delay compensation methods supported by the terminal device include the TA-based delay compensation method and the RTT-based delay compensation method, and the terminal device indicates through the third information that the terminal device requests to use the propagation delay compensation method.
  • the delay compensation mode is an RTT-based delay compensation mode, and the network device configures the terminal device to use the RTT-based delay compensation mode to perform propagation delay compensation through the second information.
  • the method for time synchronization shown in FIG. 3 further includes:
  • the sixth information from the network device is received, and the sixth information is used to trigger the terminal device to perform delay compensation in a target propagation delay compensation manner.
  • the terminal device after receiving the second information configuring available propagation delay compensation methods, the terminal device does not immediately perform propagation delay compensation, but starts to perform propagation delay compensation according to the second information after the network device triggers the terminal device to perform propagation delay compensation. Configure propagation delay compensation.
  • the sixth information may indicate one of the at least two propagation delay compensation modes Using the propagation delay compensation mode as the target propagation delay compensation mode triggers the terminal device to use the target propagation delay compensation mode to perform propagation delay compensation.
  • the sixth information may include information for the terminal device to determine the compensation amount corresponding to the target propagation delay compensation mode. Or, if the sixth information does not include information for the terminal device to determine the target propagation delay compensation amount, the network device sends other information to the terminal device, so that the terminal device determines the compensation amount corresponding to the target propagation delay compensation method according to the other information . For example, the network device may send eighth information to the terminal device, where the eighth information is used by the terminal device to determine the compensation amount corresponding to the target propagation delay compensation mode.
  • the signaling overhead can be reduced by using different information to indicate the target propagation delay compensation mode and compensation amount (explicit indication or implicit indication).
  • the method for time synchronization shown in FIG. 3 further includes:
  • the seventh information from the network device is received, where the seventh information is used to indicate the target propagation delay compensation mode.
  • the network device configures the available propagation delay compensation methods of the terminal device through the second information, it will indicate one of the available propagation delay compensation methods as the target propagation delay compensation method through the seventh information, so that the terminal device adopts the first The propagation delay compensation method indicated by the seven information is used for propagation delay compensation.
  • the seventh information may include information for the terminal device to determine the compensation amount corresponding to the target propagation delay compensation mode. Or, if the seventh information does not include information for the terminal device to determine the target propagation delay compensation amount, the network device sends other information to the terminal device, so that the terminal device determines the compensation amount corresponding to the target propagation delay compensation method according to the other information . For example, the network device may send eighth information to the terminal device, where the eighth information is used by the terminal device to determine the compensation amount corresponding to the target propagation delay compensation mode.
  • the signaling overhead can be reduced by using different information to indicate the target propagation delay compensation mode and compensation amount (explicit indication or implicit indication).
  • Fig. 6 is an example of a method for time synchronization according to an embodiment of the present application. As shown in Figure 6, methods for time synchronization include:
  • the terminal device sends capability information to the network device.
  • the terminal device informs the network device of the propagation delay compensation mode supported by the terminal device through capability information. It can be understood that the capability information in S410 is the same as the above first information used to indicate the propagation delay compensation mode supported by the terminal device.
  • the network device sends first indication information to the terminal device.
  • the network device indicates the target propagation delay compensation mode through the first indication information and triggers the terminal device to perform propagation delay compensation.
  • the first indication information in S420 is essentially the same as the second information described above, which is used to trigger the terminal device to perform propagation delay compensation and/or the second information includes the first propagation delay compensation mode indication information
  • the second information below is the same.
  • the network device sends second indication information to the terminal device.
  • the network device indicates to the terminal device, through the second indication information, information for the terminal device to determine the compensation amount corresponding to the target propagation delay compensation mode indicated by the first indication information.
  • FIG. 7 shows another example of the present application.
  • the method for time synchronization includes:
  • the terminal device sends capability information to the network device.
  • the capability information in S510 is the same as the capability information in S410.
  • the network device sends configuration information to the terminal device.
  • the network device configures available propagation delay compensation modes of the terminal device through the configuration information.
  • the configuration information is the same as the second information in the case where the second information described above is used to configure an available propagation delay compensation mode of the terminal device.
  • the network device sends first indication information to the terminal device.
  • the first indication information in S530 is the same as the first indication information in S420.
  • the network device sends second indication information to the terminal device.
  • the network device indicates to the terminal device, through the second indication information, information for the terminal device to determine the compensation amount corresponding to the target propagation delay compensation mode indicated by the first indication information.
  • Figure 8 shows another example of the present application, as shown in Figure 8, the method for time synchronization includes:
  • the terminal device sends capability information to the network device.
  • the capability information in S610 is the same as the capability information in S410.
  • the terminal device sends request information to the network device.
  • the terminal device notifies the network device of the propagation delay compensation mode to be requested through the request information. It can be understood that the request information in S620 is the same as the third information described above for the network device to determine the propagation delay compensation mode requested by the terminal device.
  • the network device sends first indication information to the terminal device.
  • the first indication information in S630 is the same as the first indication information in S420.
  • the network device sends second indication information to the terminal device.
  • the network device indicates to the terminal device, through the second indication information, information for the terminal device to determine the compensation amount corresponding to the target propagation delay compensation mode indicated by the first indication information.
  • FIG. 9 shows another example of the present application.
  • the method for time synchronization includes:
  • the terminal device sends capability information to the network device.
  • the capability information in S710 is the same as the capability information in S410.
  • the network device sends configuration information to the terminal device.
  • the network device configures the target propagation delay compensation method adopted by the terminal device to perform propagation delay compensation through the configuration information in S720.
  • the configuration information may also include propagation delay compensation period information and time offset information At least one of the .
  • the propagation delay compensation period information is used by the terminal device to determine the time interval for performing propagation delay compensation
  • the time offset information is used by the terminal device to determine the time for propagation delay compensation.
  • the network device sends second indication information to the terminal device.
  • the network device indicates to the terminal device the information for the compensation amount corresponding to the target propagation delay compensation mode determined by the terminal device through the second indication information.
  • Figure 10 shows another example of the present application, as shown in Figure 10, the method for time synchronization includes:
  • the terminal device sends capability information to the network device.
  • the capability information in S810 is the same as the capability information in S410.
  • the terminal device sends request information to the network device.
  • the request information in S820 is the same as the request information in S620.
  • the terminal device requests the network device to use the TA-based delay compensation method or the RTT-based delay compensation method by requesting information.
  • the network device sends second indication information to the terminal device.
  • the network device indicates to the terminal device the information of the compensation amount corresponding to the target propagation delay compensation mode determined by the terminal device through the second indication information. For example, if the terminal device requests the network device to use the TA-based delay compensation method or the RTT-based delay compensation method by requesting information. The network device indicates the TA estimated value or the RTT measured value through the second indication information.
  • Fig. 11 is another example according to the present application, as shown in Fig. 11, the method for time synchronization includes:
  • the terminal device sends capability information to the network device.
  • the capability information in S910 is the same as the capability information in S410.
  • the network device sends configuration information to the terminal device.
  • the network device configures available propagation delay compensation modes of the terminal device through the configuration information. For example, after the terminal device notifies the network device through capability information that the terminal device supports two propagation delay compensation methods, the network device configures the available propagation delay compensation methods of the terminal device as the two propagation delay compensation methods supported by the terminal device through the configuration information . Further, the configuration information may also include at least one item of propagation delay compensation period information and time offset information.
  • the network device sends third indication information to the terminal device.
  • the network device indicates through the third indication information that the target propagation delay compensation mode is one of the available propagation delay compensation modes configured in the configuration information. It can be understood that the difference between the third indication information in S930 and the first indication information in S420 is that in some cases, the first indication information may only trigger the terminal device to perform propagation delay compensation but does not indicate the specific propagation time The function of delay compensation mode, the third indication information does not have a trigger function, and the third indication information only has the function of indicating a specific propagation delay compensation mode.
  • the network device may first send the first instruction information in S420 to the terminal device to trigger the terminal device to perform propagation delay compensation, and then send the third instruction information to the terminal device, and pass the third instruction
  • the information indicates a specific propagation delay compensation method.
  • the network device sends second indication information to the terminal device.
  • the network device indicates to the terminal device the information of the compensation amount corresponding to the target propagation delay compensation mode determined by the terminal device through the second indication information. For example, if the target propagation delay compensation method indicated by the third indication information is a TA-based delay compensation method or an RTT-based delay compensation method. The network device indicates the TA estimated value or the RTT measured value through the second indication information.
  • the network device may send multiple pieces of second indication information to the terminal device in S940 to notify the terminal device The compensation amount corresponding to each cycle.
  • Fig. 12 is another example according to the present application, as shown in Fig. 12, the method for time synchronization includes:
  • the terminal device sends capability information to the network device.
  • the capability information in S1010 is the same as the capability information in S410.
  • the terminal device sends request information to the network device.
  • the request information in S1020 is the same as the request information in S620.
  • the terminal device requests the network device to use the TA-based delay compensation method or the RTT-based delay compensation method by requesting information.
  • the network device sends configuration information to the terminal device.
  • the network device configures available propagation delay compensation modes of the terminal device through the configuration information. For example, after the terminal device notifies the network device through capability information that the terminal device supports two propagation delay compensation methods, the network device configures the available propagation delay compensation methods of the terminal device as the two propagation delay compensation methods supported by the terminal device through the configuration information . Further, the configuration information may also include at least one item of propagation delay compensation period information and time offset information.
  • the network device sends third indication information to the terminal device.
  • the third indication information in S1040 is the same as the third indication information in S930.
  • the network device sends second indication information to the terminal device.
  • the second indication information in S1050 is the same as the second indication information in S940.
  • the compensation amount in each cycle may change, so the network device may send multiple pieces of second indication information to the terminal device in S1050 to notify the terminal device The compensation amount corresponding to each cycle.
  • the network device determines under certain circumstances that the target propagation delay compensation method needs to be replaced, the network device sends the third indication information to the terminal device again, and then sends the second indication information to the terminal device. Therefore, as shown in FIG. 12 , the network device may send the third indication information and the second indication information to the terminal device multiple times.
  • Figure 13 is another example according to the present application, as shown in Figure 13, the method for time synchronization includes:
  • the terminal device sends capability information to the network device.
  • the capability information in S1110 is the same as the capability information in S410.
  • the terminal device sends request information to the network device.
  • the request information in S1120 is the same as the request information in S620.
  • the terminal device requests the network device to use the TA-based delay compensation method or the RTT-based delay compensation method by requesting information.
  • the network device sends third indication information to the terminal device.
  • the third indication information in S1130 is the same as the third indication information in S930.
  • the network device sends second indication information to the terminal device.
  • the second indication information in S1140 is the same as the second indication information in S940.
  • the network device determines under certain circumstances that the target propagation delay compensation method needs to be replaced, the network device sends the third indication information to the terminal device again, and then sends the second indication information to the terminal device. Therefore, as shown in FIG. 13 , the network device may send the third indication information and the second indication information to the terminal device multiple times.
  • the second indication information in these examples may be sent by the terminal device to the network device.
  • the target propagation delay compensation method is an RTT-based propagation delay compensation method
  • the network device performs propagation delay compensation
  • the terminal device sends second indication information to the network device, indicating the RTT measurement value, so that the network device is based on The received RTT measurements enable propagation delay compensation.
  • Fig. 14 is a schematic flowchart of another method for time synchronization provided by the embodiment of the present application.
  • the method for time synchronization shown in FIG. 14 can be applied to the above-mentioned communication system, and can be specifically applied to the above-mentioned network device. As shown in Figure 14, the method includes:
  • S1210 Receive first information from a terminal device, where the first information is used to indicate a propagation delay compensation mode supported by the terminal device.
  • S1220 Send second information to the terminal device, where the second information is used by the terminal device to perform propagation delay compensation according to a target propagation delay compensation mode related to the second information;
  • the target propagation delay compensation mode is one of the propagation delay compensation modes supported by the terminal device, or the target propagation delay compensation mode is a propagation delay compensation mode determined by the terminal device itself.
  • the network device after receiving the information indicating the propagation delay compensation mode supported by the terminal device, the network device sends the second information to the terminal device, so that the terminal device can The target propagation delay compensation method is used for propagation delay compensation.
  • the terminal device can determine the propagation delay compensation method to be used according to the information sent by the network device, and perform propagation delay compensation according to the propagation delay compensation method, which can guarantee The requirements of different business scenarios for time synchronization accuracy, so as to meet the requirements of different business scenarios for data transmission reliability.
  • the target propagation delay compensation mode is one of the propagation delay compensation modes requested by the terminal device among the propagation delay compensation modes supported by the terminal device;
  • the method shown in FIG. 14 further includes:
  • the third information indicates the target propagation delay compensation manner.
  • the second information is used to trigger the terminal device to perform propagation delay compensation.
  • the second information includes first propagation delay compensation mode indication information, and the first propagation delay compensation mode indication information is used to indicate the target propagation delay compensation mode .
  • the second information includes first compensation amount information
  • the first compensation amount information is used by the terminal device to determine the compensation amount corresponding to the target propagation delay compensation mode .
  • the method shown in FIG. 14 further includes:
  • the fourth information includes second propagation delay compensation mode indication information
  • the second propagation delay compensation mode indication information is used to indicate the target propagation delay compensation mode
  • the fourth information further includes second compensation amount information, and the second compensation amount information is used by the terminal device to determine the compensation corresponding to the target propagation delay compensation method quantity.
  • the method shown in FIG. 14 further includes:
  • the terminal device informs the network device of the propagation delay compensation method requested by the terminal device by sending the third information to the network, the network device will obtain the propagation delay compensation method supported by the terminal device and the requested propagation delay compensation method. Based on the compensation method, the available propagation delay compensation method of the terminal equipment can be determined based on these information, and a more suitable delay compensation method can be determined for the current business scenario, so as to ensure the time synchronization accuracy requirements of different business scenarios and meet different requirements. Requirements for data transmission reliability in business scenarios.
  • the fifth information further includes at least one of propagation delay compensation period information and time offset information.
  • the second information is used to configure an available propagation delay compensation mode of the terminal device, and the available propagation delay compensation mode includes the target propagation delay compensation mode.
  • the second information further includes at least one of propagation delay compensation period information and time offset information.
  • the target propagation delay compensation method is one of the propagation delay compensation methods supported by the terminal device, and the second information configures the available propagation delay compensation method is the target propagation delay compensation mode.
  • the method shown in FIG. 14 further includes:
  • the method shown in FIG. 14 further includes:
  • the method shown in FIG. 14 further includes:
  • the propagation delay compensation mode supported by the terminal device includes at least one of a first propagation delay compensation mode and a second propagation delay compensation mode.
  • the first propagation delay compensation method is a delay compensation method based on a time advance TA
  • the second propagation delay compensation method is a delay compensation method based on a round trip time RTT .
  • Fig. 15 is a schematic structural diagram of a terminal device according to an embodiment of the present application. As shown in Figure 15, the terminal equipment includes:
  • the transceiver module 1310 is configured to send first information to the network device, where the first information is used to indicate the propagation delay compensation mode supported by the terminal device.
  • the transceiving module 1310 is further configured to receive second information from the network device.
  • a processing module 1320 configured to perform propagation delay compensation according to a target propagation delay compensation manner related to the second information
  • the target propagation delay compensation mode is one of the propagation delay compensation modes supported by the terminal device, or the target propagation delay compensation mode is a propagation delay compensation mode determined by the terminal device itself.
  • the terminal device sends information indicating the propagation delay compensation mode supported by the terminal device to the network device, and after receiving the second information sent by the network device, according to the target propagation delay related to the second information
  • the compensation mode performs propagation delay compensation, and the target propagation delay compensation mode related to the second information is one of the propagation delay compensation modes supported by the terminal device or a propagation delay compensation mode determined by the terminal device itself.
  • the terminal device Through the signaling interaction between the terminal device and the network device, it can determine the propagation delay compensation method to be used according to the information issued by the network device, and perform propagation delay compensation according to the propagation delay compensation method, which can guarantee different business scenarios The need for time synchronization accuracy, so as to meet the needs of data transmission reliability in different task scenarios.
  • the target propagation delay compensation mode is one of the propagation delay compensation modes requested by the terminal device among the propagation delay compensation modes supported by the terminal device;
  • the transceiver module 1310 before receiving the second information from the network device, the transceiver module 1310 is further configured to:
  • the third information indicates the target propagation delay compensation manner.
  • the second information is used to trigger the terminal device to perform propagation delay compensation.
  • the second information includes first propagation delay compensation mode indication information, and the first propagation delay compensation mode indication information is used to indicate the target propagation delay compensation mode .
  • the second information includes first compensation amount information
  • the first compensation amount information is used by the terminal device to determine the compensation amount corresponding to the target propagation delay compensation mode .
  • the transceiver module 1310 is further configured to:
  • the fourth information includes second propagation delay compensation mode indication information
  • the second propagation delay compensation mode indication information is used to indicate the target propagation delay compensation Way.
  • the fourth information further includes second compensation amount information, and the second compensation amount information is used by the terminal device to determine the compensation corresponding to the target propagation delay compensation method quantity.
  • the transceiver module 1310 is further configured to:
  • the fifth information further includes at least one of propagation delay compensation cycle information and time offset information.
  • the second information is used to configure an available propagation delay compensation mode of the terminal device, and the available propagation delay compensation mode includes the target propagation delay compensation mode.
  • the second information further includes at least one of propagation delay compensation cycle information and time offset information.
  • the target propagation delay compensation method is one of the propagation delay compensation methods supported by the terminal device, and the second information configures the available propagation delay compensation method is the target propagation delay compensation mode.
  • the transceiver module 1310 is also used to:
  • the transceiver module 1310 is also used to:
  • the transceiver module 1310 is also used to:
  • the propagation delay compensation mode supported by the terminal device includes at least one of a first propagation delay compensation mode and a second propagation delay compensation mode.
  • the first propagation delay compensation method is a delay compensation method based on a time advance TA
  • the second propagation delay compensation method is a delay compensation method based on a round trip time RTT .
  • the terminal device shown in FIG. 15 can implement the corresponding processes implemented by the terminal device in the various methods of the embodiments of the present application, and for the sake of brevity, details are not repeated here.
  • Fig. 16 is a schematic structural diagram of a network device according to an embodiment of the present application. As shown in Figure 16, the network equipment includes:
  • a receiving module 1410 configured to receive first information from a terminal device, where the first information is used to indicate a propagation delay compensation mode supported by the terminal device;
  • a sending module 1420 configured to send second information to the terminal device, where the second information is used by the terminal device to perform propagation delay compensation according to a target propagation delay compensation method related to the second information;
  • the target propagation delay compensation mode is one of the propagation delay compensation modes supported by the terminal device, or the target propagation delay compensation mode is a propagation delay compensation mode determined by the terminal device itself.
  • the network device after receiving the information sent by the terminal device indicating the propagation delay compensation mode supported by the terminal device, it sends the second information to the terminal device, so that the terminal device broadcasts the information according to the target related to the second information.
  • the delay compensation mode performs propagation delay compensation, and the target propagation delay compensation mode related to the second information is one of the propagation delay compensation modes supported by the terminal device or a propagation delay compensation mode determined by the terminal device itself.
  • the terminal device can determine the propagation delay compensation method to be used according to the information issued by the network device, and perform propagation delay compensation according to the propagation delay compensation method, which can ensure Different business scenarios require time synchronization accuracy, so as to meet the requirements of different task scenarios for data transmission reliability.
  • the target propagation delay compensation mode is one of the propagation delay compensation modes requested by the terminal device among the propagation delay compensation modes supported by the terminal device;
  • the receiving module 1410 is further configured to:
  • the third information indicates the target propagation delay compensation manner.
  • the second information is used to trigger the terminal device to perform propagation delay compensation.
  • the second information includes first propagation delay compensation mode indication information, and the first propagation delay compensation mode indication information is used to indicate the target propagation delay compensation mode .
  • the second information includes first compensation amount information
  • the first compensation amount information is used by the terminal device to determine the compensation amount corresponding to the target propagation delay compensation mode .
  • the sending module 1420 is further configured to:
  • the fourth information further includes second compensation amount information, and the second compensation amount information is used by the terminal device to determine the compensation corresponding to the target propagation delay compensation method quantity.
  • the sending module 1420 is further configured to:
  • the fifth information further includes at least one of propagation delay compensation cycle information and time offset information.
  • the second information is used to configure an available propagation delay compensation mode of the terminal device, and the available propagation delay compensation mode includes the target propagation delay Compensation method.
  • the second information further includes at least one of propagation delay compensation cycle information and time offset information.
  • the target propagation delay compensation method is one of the propagation delay compensation methods supported by the terminal device, and the second information configures the available propagation delay compensation method is the target propagation delay compensation mode.
  • the sending module 1420 is also used to:
  • the sending module 1420 is also used to:
  • the sending module 1420 is also used to:
  • the propagation delay compensation mode supported by the terminal device includes at least one of a first propagation delay compensation mode and a second propagation delay compensation mode.
  • the first propagation delay compensation method is a delay compensation method based on a time advance TA
  • the second propagation delay compensation method is a delay compensation method based on a round trip time RTT .
  • the network device shown in FIG. 16 can implement the corresponding processes implemented by the network device in the various methods of the embodiments of the present application. For the sake of brevity, details are not repeated here.
  • FIG. 17 is a schematic structural diagram of another terminal device provided by an embodiment of the present application.
  • the terminal device may include: a processor 1510 , a memory 1520 and a transceiver 1530 , and the processor 1510 may call and run a computer program from the memory 1520 to implement the method in the embodiment of the present application.
  • the memory 1520 may be an independent device independent of the processor 1510 , or may be integrated in the processor 1510 .
  • the processor 1510 can control the transceiver 1530 to communicate with other devices, specifically, can send information or data to other devices, or receive information or data sent by other devices.
  • the transceiver 1530 may include a transmitter and a receiver, and the transceiver 1530 may further include an antenna, and the number of antennas may be one or more.
  • the terminal device shown in FIG. 17 can implement the corresponding processes implemented by the terminal device in the various methods of the embodiments of the present application, and for the sake of brevity, details are not repeated here.
  • FIG. 18 is a schematic structural diagram of another network device provided by an embodiment of the present application.
  • the network device may include: a processor 1610 , a memory 1620 and a transceiver 1630 , and the processor 1610 may call and run a computer program from the memory 1620 to implement the method in the embodiment of the present application.
  • the memory 1620 may be an independent device independent of the processor 1610 , or may be integrated in the processor 1610 .
  • the processor 1610 can control the transceiver 1630 to communicate with other devices, specifically, can send information or data to other devices, or receive information or data sent by other devices.
  • the transceiver 1630 may include a transmitter and a receiver, and the transceiver 1630 may further include an antenna, and the number of antennas may be one or more.
  • the network device shown in FIG. 18 can implement the corresponding processes implemented by the network device in the various methods of the embodiments of the present application. For the sake of brevity, details are not repeated here.
  • the processor in the embodiment of the present application may be an integrated circuit chip, which has a signal processing capability.
  • each step of the above-mentioned method embodiments may be completed by an integrated logic circuit of hardware in a processor or instructions in the form of software.
  • the above-mentioned processor can be a general-purpose processor, a digital signal processor (Digital Signal Processor, DSP), an application-specific integrated circuit (Application Specific Integrated Circuit, ASIC), an off-the-shelf programmable gate array (Field Programmable Gate Array, FPGA) or other available Program logic devices, discrete gate or transistor logic devices, discrete hardware components.
  • DSP Digital Signal Processor
  • ASIC Application Specific Integrated Circuit
  • FPGA Field Programmable Gate Array
  • a general-purpose processor may be a microprocessor, or the processor may be any conventional processor, or the like.
  • the steps of the method disclosed in connection with the embodiments of the present application may be directly implemented by a hardware decoding processor, or implemented by a combination of hardware and software modules in the decoding processor.
  • the software module can be located in a mature storage medium in the field such as random access memory, flash memory, read-only memory, programmable read-only memory or electrically erasable programmable memory, register.
  • the storage medium is located in the memory, and the processor reads the information in the memory, and completes the steps of the above method in combination with its hardware.
  • the memory in the embodiments of the present application may be a volatile memory or a nonvolatile memory, or may include both volatile and nonvolatile memories.
  • the non-volatile memory can be read-only memory (Read-Only Memory, ROM), programmable read-only memory (Programmable ROM, PROM), erasable programmable read-only memory (Erasable PROM, EPROM), electronically programmable Erase Programmable Read-Only Memory (Electrically EPROM, EEPROM) or Flash.
  • the volatile memory can be Random Access Memory (RAM), which acts as external cache memory.
  • RAM Static Random Access Memory
  • SRAM Static Random Access Memory
  • DRAM Dynamic Random Access Memory
  • Synchronous Dynamic Random Access Memory Synchronous Dynamic Random Access Memory
  • SDRAM double data rate synchronous dynamic random access memory
  • Double Data Rate SDRAM, DDR SDRAM enhanced synchronous dynamic random access memory
  • Enhanced SDRAM, ESDRAM synchronous connection dynamic random access memory
  • Synchlink DRAM, SLDRAM Direct Memory Bus Random Access Memory
  • Direct Rambus RAM Direct Rambus RAM
  • FIG. 19 is a schematic structural diagram of a chip according to an embodiment of the present application.
  • the chip 1700 shown in FIG. 19 includes a processor 1710, and the processor 1710 can invoke and run a computer program from a memory 1720, so as to implement the method in the embodiment of the present application.
  • the chip 1700 may further include a memory 1720 .
  • the processor 1710 can invoke and run a computer program from the memory 1720, so as to implement the method in the embodiment of the present application.
  • the memory 1720 may be an independent device independent of the processor 1710 , or may be integrated in the processor 1710 .
  • the chip 1700 may also include an input interface 1730 .
  • the processor 1710 can control the input interface 1730 to communicate with other devices or chips, specifically, can obtain information or data sent by other devices or chips.
  • the chip 1700 may also include an output interface 1740 .
  • the processor 1710 can control the output interface 1740 to communicate with other devices or chips, specifically, can output information or data to other devices or chips.
  • the chip can be applied to the terminal device/network device in the embodiment of the present application, and the chip can implement the corresponding processes implemented by the terminal device/network device in each method of the embodiment of the present application.
  • the chip can implement the corresponding processes implemented by the terminal device/network device in each method of the embodiment of the present application.
  • the chip can implement the corresponding processes implemented by the terminal device/network device in each method of the embodiment of the present application.
  • the chip mentioned in the embodiment of the present application may also be called a system-on-chip, a system-on-chip, a system-on-a-chip, or a system-on-a-chip.
  • Fig. 20 is a schematic diagram of a communication system provided by an embodiment of the present application. As shown in FIG. 20, the communication system includes terminal equipment and network equipment.
  • the terminal device can be used to realize the corresponding functions realized by the terminal device in the above method
  • the network device can be used to realize the corresponding functions realized by the network device in the above method.
  • details are not repeated here.
  • An embodiment of the present application also provides a computer-readable storage medium, wherein the computer-readable storage medium stores a computer program for electronic data exchange, wherein the computer program enables a terminal device or a network device to perform the above method Part or all of the steps described in the terminal device or network device in the embodiment.
  • An embodiment of the present application also provides a computer program product, wherein the computer program product includes a non-transitory computer-readable storage medium storing a computer program, and the computer program is operable to enable a terminal device or a network device to perform the following steps: Part or all of the steps described by the terminal or network device in the above method embodiments.
  • the computer program product may be a software installation package.
  • the disclosed systems, devices and methods may be implemented in other ways.
  • the device embodiments described above are only illustrative.
  • the division of the units is only a logical function division. In actual implementation, there may be other division methods.
  • multiple units or components can be combined or May be integrated into another system, or some features may be ignored, or not implemented.
  • the mutual coupling or direct coupling or communication connection shown or discussed may be through some interfaces, and the indirect coupling or communication connection of devices or units may be in electrical, mechanical or other forms.
  • the units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place, or may be distributed to multiple network units. Part or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.
  • each functional unit in each embodiment of the present application may be integrated into one processing unit, each unit may exist separately physically, or two or more units may be integrated into one unit.
  • the functions described above are realized in the form of software function units and sold or used as independent products, they can be stored in a computer-readable storage medium.
  • the technical solution of the present application is essentially or the part that contributes to the prior art or the part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including Several instructions are used to make a computer device (which may be a personal computer, a server, or a network device, etc.) execute all or part of the steps of the methods described in the various embodiments of the present application.
  • the aforementioned storage media include: U disk, mobile hard disk, read-only memory (Read-Only Memory,) ROM, random access memory (Random Access Memory, RAM), magnetic disk or optical disc, etc., which can store program codes. .

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Abstract

本申请实施例公开了一种用于时间同步的方法、终端设备和网络设备，该方法包括：向网络设备发送第一信息，第一信息用于指示终端设备支持的传播时延补偿方式；接收来自于网络设备的第二信息；根据与第二信息相关的目标传播时延补偿方式进行传播时延补偿；目标传播时延补偿方式为终端设备支持的传播时延补偿方式中的一种，或目标传播时延补偿方式为由终端设备自行决定传播时延补偿方式。采用本申请实施例的方法，能够基于终端设备与网络设备之间的信令交互确定要使用的传播时延补偿方式进而保障不同业务场景对时间同步精度的需求，从而满足不同业务场景对数据传输可靠性的需求。

Description

用于时间同步的方法、终端设备和网络设备 技术领域
本申请涉及通信技术领域，尤其涉及一种用于时间同步的方法、终端设备和网络设备。
背景技术
在通信系统中，终端设备与网络设备之间需要时间同步，以实现数据的可靠传输。通常终端设备和网络设备可以通过执行传播时延补偿操作实现时间同步，但是基于目前的通信标准，由终端设备自行决定是否要执行传播时延补偿操作，无法保障不同业务场景对时间同步精度的需求，导致无法满足不同业务场景对数据传输可靠性的需求。
发明内容
本申请实施例提供一种用于时间同步的方法、终端设备和网络设备，能够基于终端设备与网络设备之间的信令交互确定要使用的传播时延补偿方式进而保障不同业务场景对时间同步精度的需求，从而满足不同业务场景对数据传输可靠性的需求。
第一方面，本申请实施例提供一种用于时间同步的方法，应用于终端设备，该方法包括：
向网络设备发送第一信息，所述第一信息用于指示所述终端设备支持的传播时延补偿方式；
接收来自于所述网络设备的第二信息；
根据与所述第二信息相关的目标传播时延补偿方式进行传播时延补偿；
其中，所述目标传播时延补偿方式为所述终端设备支持的传播时延补偿方式中的一种，或所述目标传播时延补偿方式为由所述终端设备自行决定传播时延补偿方式。
第二方面，本申请实施例提供一种用于时间同步的方法，应用于网络设备，该方法包括：
接收来自于终端设备的第一信息，所述第一信息用于指示所述终端设备支持的传播时延补偿方式；
向所述终端设备发送第二信息，所述第二信息用于所述终端设备根据与所述第二信息相关的目标传播时延补偿方式进行传播时延补偿；
其中，所述目标传播时延补偿方式为所述终端设备支持的传播时延补偿方式中的一种，或所述目标传播时延补偿方式为由所述终端设备自行决定传播时延补偿方式。
第三方面，本申请实施例提供一种终端设备，所述终端设备包括：
收发模块，用于向网络设备发送第一信息，所述第一信息用于指示所述终端设备支持的传播时延补偿方式；
所述收发模块，还用于接收来自于所述网络设备的第二信息；
处理模块，用于根据与所述第二信息相关的目标传播时延补偿方式进行传播时延补偿；
其中，所述目标传播时延补偿方式为所述终端设备支持的传播时延补偿方式中的一种，或所述目标传播时延补偿方式为由所述终端设备自行决定传播时延补偿方式。
第四方面，本申请实施例提供一种网络设备，所述网络设备包括：
接收模块，用于接收来自于终端设备的第一信息，所述第一信息用于指示所述终端设备支持的传播时延补偿方式；
发送模块，用于向所述终端设备发送第二信息，所述第二信息用于所述终端设备根据与所述第二信息相关的目标传播时延补偿方式进行传播时延补偿；
其中，所述目标传播时延补偿方式为所述终端设备支持的传播时延补偿方式中的一种，或所述目标传播时延补偿方式为由所述终端设备自行决定传播时延补偿方式。
第五方面，本申请实施例一种终端设备，其特征在于，包括处理器、存储器、通信接口，以及一个或多个程序，所述一个或多个程序被存储在所述存储器中，所述处理器执行所述一个或多个程序使得所述终端设备执行第一方面所述的用于时间同步的方法。
第六方面，本申请实施例提供一种网络设备，包括处理器、存储器、通信接口，以及一个或多个程序， 所述一个或多个程序被存储在所述存储器中，所述处理器执行所述一个或多个程序使得所述网络设备执行第二方面所述的用于时间同步的方法。
第七方面，本申请实施例提供了一种通信系统，该系统包括上述的终端设备和/或网络设备。在另一种可能的设计中，该系统还可以包括本申请实施例提供的方案中与该终端设备或网络设备进行交互的其他设备。
第八方面，本申请实施例提供了一种计算机可读存储介质，所述计算机可读存储介质存储有计算机程序，所述计算机程序使得终端设备执行如本申请实施例第一方面的用于时间同步的方法中所描述的部分或全部步骤。
第九方面，本申请实施例提供了一种计算机可读存储介质，所述计算机可读存储介质存储有计算机程序，所述计算机程序使得网络设备执行如本申请实施例第二方面的用于时间同步的方法中所描述的部分或全部步骤。
第十方面，本申请实施例提供了一种计算机程序产品，其中，所述计算机程序产品包括存储了计算机程序的非瞬时性计算机可读存储介质，所述计算机程序可操作来使终端设备执行如本申请实施例第一方面的用于时间同步的方法中所描述的部分或全部步骤。该计算机程序产品可以为一个软件安装包。
第十一方面，本申请实施例提供了一种计算机程序产品，其中，所述计算机程序产品包括存储了计算机程序的非瞬时性计算机可读存储介质，所述计算机程序可操作来使网络设备执行如本申请实施例第二方面的用于时间同步的方法中所描述的部分或全部步骤。该计算机程序产品可以为一个软件安装包。
第十二方面，本申请实施例提供了一种芯片，该芯片包括存储器和处理器，处理器可以从存储器中调用并运行计算机程序，以实现第一方面或第二方面的用于时间同步的方法中所描述的部分或全部步骤。
在本申请实施例提供的方案中，终端设备向网络设备发送指示终端设备支持的传播时延补偿方式的信息，并在接收到网络设备发送的第二信息后，根据与第二信息相关的目标传播时延补偿方式进行传播时延补偿，与第二信息相关的目标传播时延补偿方式为终端设备支持的传播时延补偿方式中的一种或者为由终端设备自行决定传播时延补偿方式。通过终端设备与网络设备之间的信令交互，终端设备可以根据网络设备下发的信息确定要使用的传播时延补偿方式，并且根据该传播时延补偿方式进行传播时延补偿，能够保障不同业务场景对时间同步精度的需求，从而满足不同业务场景对数据传输可靠性的需求。
附图说明
为了更清楚地说明本申请实施例中的技术方案，下面将对实施例描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本申请的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。
图1是本申请实施例提供的一种通信系统的架构图。
图2是本申请实施例提供的一种时间敏感性网络TSN的系统架构图。
图3是本申请实施例提供的用于时间同步的方法的示意性流程图。
图4是本申请实施例提供的用于时间同步的方法的另一示意性流程图。
图5是本申请实施例提供的用于时间同步的方法的再一示意性流程图。
图6是本申请实施例提供的用于时间同步的方法的一个例子的示意性流程图。
图7是本申请实施例提供的用于时间同步的方法的另一个例子的示意性流程图。
图8是本申请实施例提供的用于时间同步的方法的再一个例子的示意性流程图。
图9是本申请实施例提供的用于时间同步的方法的再一个例子的示意性流程图。
图10是本申请实施例提供的用于时间同步的方法的再一个例子的示意性流程图。
图11是本申请实施例提供的用于时间同步的方法的再一个例子的示意性流程图。
图12是本申请实施例提供的用于时间同步的方法的再一个例子的示意性流程图。
图13是本申请实施例提供的用于时间同步的方法的再一个例子的示意性流程图。
图14是本申请另一实施例的用于时间同步的方法的示意性流程图。
图15是本申请实施例的终端设备的结构示意图。
图16是本申请实施例的网络设备的结构示意图。
图17是本申请另一实施例的终端设备的结构示意图。
图18是本申请另一实施例的网络设备的结构示意图。
图19是本申请实施例的芯片的结构示意图。
图20是本申请实施例的通信系统的示意图。
具体实施方式
为使本申请的目的、技术方案和优点更加清楚，下面将结合附图对本申请实施方式作进一步地详细描述。
可以理解，本申请的技术方案可具体应用于时间敏感性网络(Time Sensitive Network，TSN)系统、时间敏感性通信(Time Sensitive Communication，TSC)系统、第五代移动通信(the 5th Generation，5G)系统或者称为新空口(New Radio，NR)系统、长期演进(Long Term Evolution，LTE)系统等。
请参见图1，是本申请提供的一种通信系统的架构图。如图1所示，该通信系统可以包括：一个或多个网络设备101，以及，一个或多个终端设备102，图1中仅示出一个网络设备101和一个终端设备102作为示例。该网络设备101和终端设备102之间可以进行数据传输。为了保障数据传输的可靠性，需要进行终端设备102和网络设备101之间的时间同步。
在某些场景下，如对于TSN或TSC系统，又如对于某些高同步精度要求的业务，又如对于某些低时延要求的业务等等，需要确保不同系统或业务场景对时间同步精度的需求，以满足数据传输需求。以TSN系统为例，请参见图2，为本申请实施例提供的一种TSN系统架构图。如图2所示，该TSN系统可包括TSN桥或TSN网桥(TSN bridge)、设备侧(Device)TSN转换设备(TSN Translator)、5G系统(5GS)、网络侧桥(Network side of Bridge)和TSN系统(TSN System)。其中，该TSN bridge可以为终端站、终点站、端站点(End Station)等等；该5GS可包括终端设备如用户设备(User Equipment，UE)、(无线(Raddio，R))接入网(Access Network，AN)、接入和移动性管理实体(Access and Mobility Management Function，AMF)、会话管理功能实体(Session Management Function，SMF)、统一数据管理实体(Unified Data Management，UDM)、用户面功能实体(User Plane Function，UPF)、策略与计费功能实体(Policy and Charging Function，PCF)、网络开放功能实体(Network Exposure Function，NEF)等网元；该Network side of Bridge可包括控制面(Control Plane，CP)TSN转换设备如应用功能(Network Exposure Function，AF)，以及用户面(User Plane，UP)TSN转换设备；该TSN System可包括TSN集中用户配置(Centralized User Configuration，GUC)、TSN集中网络配置(Centralized NetworkConfiguration，CNC)、TSN桥等网元。其中，(R)AN可包括网络设备如基站，该设备侧TSN Translator和该UE为设备侧桥(Device side of Bridge)中的网元。在TSN网络中，可将5G网络作为TSN bridge，通过5G网络为TSN网络和业务提供服务。
在本申请实施例中，网络设备可以为网络侧的一种用来发送或接收信息的实体，比如可以为基站，基站可以用于与一个或多个终端设备进行通信，也可以用于与一个或多个具有部分终端功能的基站进行通信(比如宏基站与微基站之间的通信，如接入点之间的通信)。基站可以是基站收发台(Base Transceiver Station，BTS)，也可以是长期演进(Long Term Evolution，LTE)系统中的演进型基站(Evolutional Node B，eNB)，还可以是NR系统中的基站gNB，等等，此处不一一列举。或者，该网络设备101还可以是传输点(Transmission Point，TP)、接入点(Access Point，AP)、收发点(Transmission and Receiver Point，TRP)、中继设备、中心单元(Central Unit，CU)，或者具备基站功能的其他网络设备等等，本申请实施例对此不做限定。
在本申请实施例中，终端设备是具有通信功能的设备，例如可以是车载设备、可穿戴设备、手持设备(如智能手机)等。该终端设备还可以叫做其余名称，比如用户设备(User Equipment，UE)、用户单元、移动台(Mobile Station，MS)、移动单元(Mobile Unit，MU)等等，本申请实施例对此不做限定。
在本申请实施例中，时间同步还可称为同步、时钟同步等等，本申请实施例对此不做限定。
可以理解，图1或图2示出的通信系统只是作为一种示例，并不构成对本申请的限定，本领域普通技术人员可知，随着网络架构的演变和新业务场景的出现，本申请提供的技术方案对于类似的技术问题，同样适用。
应理解，在本申请的各种实施例中，各过程的序号的大小并不意味着执行顺序的先后，各过程的执行顺序应以其功能和内在逻辑确定，而不应对本申请实施例的实施过程构成任何限定。
请参见图3，图3是本申请实施例提供的一种用于时间同步的方法的流程示意图。本实施例的用于时间同步的方法可应用于上述的通信系统中，并可具体应用于如上述的终端设备中。如图3所示，该方法包括：
S310，向网络设备发送第一信息，该第一信息用于指示终端设备支持的传播时延补偿方式。
可选地，在一些实施例中，终端设备可以向网络设备发送能力信息(Capability Information)，通过能力信息向网络设备上报自己支持的传播时延补偿方式。
在本申请实施例中，终端设备支持的传播时延补偿方式可能是一种传播时延补偿方式，也可能是多种传播时延补偿方式。例如，终端设备支持的传播时延补偿方式包括第一传播时延补偿方式和第二传播时延补偿方式中的至少一种。这里的第一传播时延补偿方式为基于时间提前(Time Advance，TA)的时延补偿 方式，第二传播时延补偿方式为基于往返时间(Round-Trip Time，RTT)的时延补偿方式。
以上文中的基于TA的时延补偿方式和基于RTT的时延补偿方式为例，可以将终端设备的能力划分为3种，具备能力1的终端设备只支持基于TA的时延补偿方式，具备能力2的终端设备只支持基于RTT的时延补偿方式，具有能力3的终端设备同时支持基于TA的时延补偿方式和基于RTT的时延补偿方式，终端设备可以通过能力信息中的一个信息域的取值指示该终端设备的能力，进而指示终端设备支持的时延补偿方式。
S320，终端设备接收来自于网络设备的第二信息。
可以理解的是，该第二信息是由网络设备基于终端设备发送的第一信息确定的。
S330，根据与第二信息相关的目标传播时延补偿方式进行传播时延补偿。目标传播时延补偿方式为终端设备支持的传播时延补偿方式中的一种，或目标传播时延补偿方式为由终端设备自行决定传播时延补偿方式。
需要说明的是，在S330中，终端设备自行决定传播时延补偿方式可以理解为由终端设备自行实现传播时延补偿过程，终端设备可以进行传播时延补偿，也可以不进行传播时延补偿。或者可以理解为，不进行当前通信标准版本定义的传播时延补偿过程，由终端设备自行实现传播时延补偿过程，终端设备可以进行时延补偿，也可以不进行传播时延补偿。
根据本申请实施例的用于时间同步的方法，终端设备向网络设备发送指示终端设备支持的传播时延补偿方式的信息，并在接收到网络设备发送的第二信息后，根据与第二信息相关的目标传播时延补偿方式进行传播时延补偿，与第二信息相关的目标传播时延补偿方式为终端设备支持的传播时延补偿方式中的一种或者为由终端设备自行决定传播时延补偿方式。通过终端设备与网络设备之间的信令交互，终端设备可以根据网络设备下发的信息确定要使用的传播时延补偿方式，并且根据该传播时延补偿方式进行传播时延补偿，能够保障不同业务场景对时间同步精度的需求，从而满足不同业务场景对数据传输可靠性的需求。
可以理解的是，图3示出的用于时间同步的方法是由终端设备执行传播时延补偿过程，如果要由网络设备执行传播时延补偿过程，则由网络设备根据目标传播时延补偿方式进行传播时延补偿，从而实现终端设备与网络设备之间的时间同步。
在本申请的一些实施例中，S330中的目标传播时延补偿方式为终端设备支持的传播时延补偿方式中由所述终端设备请求使用的传播时延补偿方式中的一种；在这种情况下，如图4所示出的，在S320之前，图3所示的方法还包括：
S340，向网络设备发送第三信息，该第三信息用于网络设备确定终端设备请求使用的传播时延补偿方式。
也就是说，终端设备在向网络设备发送指示自己支持的传播时延补偿之后，且在接收到网络设备发送的第二信息之前，终端设备通过向网络设备发送第三信息告知网络设备终端设备请求使用的传播时延补偿方式。网络设备在获取到终端设备支持的传播时延补偿方式和请求使用的传播时延补偿方式的基础上，能够基于这些信息为当前的业务场景确定更为合适的时延补偿方式，能够保障不同业务场景对时间同步精度的需求，从而满足不同业务场景对数据传输可靠性的需求。
举例来说，终端设备支持基于TA的时延补偿方式和基于RTT的时延补偿方式，终端设备通过第三信息告知网络设备该终端设备请求使用基于TA的时延补偿方式，或者告知网络设备该终端设备请求使用基于RTT的时延补偿方式。
进一步地，第三信息指示目标传播时延补偿方式。换言之，终端设备请求使用的传播时延补偿方式即为与第二信息相关的传播时延补偿方式。在这种情况下，网络设备基于终端设备发送的第一信息和第三信息，确定第二信息。
在一些实施例中，S320中的第二信息用于触发终端设备进行传播时延补偿。在这里，第二信息用于触发终端设备进行传播时延补偿也可以理解为第二信息用于指示终端设备进行传播时延补偿。
第二信息用于触发终端设备进行传播时延补偿的方式可以是通过指示目标传播时延补偿方式触发终端设备进行传播时延补偿。在一些实施例中，第二信息中包括第一传播时延补偿方式指示信息，第一传播时延方式指示信息用于指示目标传播时延补偿方式。
举例来说，终端设备向网络设备发送第一信息之后，网络设备向终端设备发送第二信息，第二信息指示目标传播时延补偿方式。或者终端设备向网络设备发送第一信息后，终端设备向网络设备发送第三信息，网络设备在接收到第三信息之后，向终端设备发送第二信息，第二信息用于指示目标传播时延补偿方式。终端设备在接收到第二信息后，基于目标传播时延补偿方式进行传播时延补偿。如果后续终端设备再次接收到的第二信息指示终端设备采用其他传播时延补偿方式进行传播时延补偿，则终端设备基于最新接收到的第二信息指示的传播时延补偿方式进行传播时延补偿。
可以理解的是，如果第二信息中只包括第一传播时延补偿方式指示信息，第二信息与第一传播时延补 偿方式指示信息本质上为同一条信息。
作为一个例子，在采用半周期(或者理解为半持续(Semi-Persistent，SP)或半静态)的时延补偿的场景中，可以通过第二信息触发终端设备进行传播时延补偿。
S320中的第二信息中可以包括第一补偿量信息，第一补偿量信息用于终端设备确定目标传播时延补偿方式对应的补偿量。
举例来说，终端设备向网络设备发送第一信息之后，网络设备向终端设备发送第二信息，第二信息触发终端设备采用目标传播时延补偿方式进行传播时延补偿，同时在第二信息中包括第一补偿量信息，终端设备根据第一补偿量信息确定目标传播时延补偿方式对应的补偿量，进而通过目标传播时延补偿方式实现传播实现补偿。或者终端设备向网络设备发送第一信息后，终端设备向网络设备发送第三信息，网络设备在接收到第三信息之后，向终端设备发送第二信息，第二信息用于指示目标传播时延补偿方式，同时在第二信息中包括第一补偿量信息，终端设备根据第一补偿量信息确定目标传播时延补偿方式对应的补偿量，进而通过目标传播时延补偿方式实现传播时延补偿。通过使用一个信息使终端设备既可以确定目标传播时延补偿方式又可以确定目标传播时延补偿方式的方法，能够简化网络设备和终端设备的实现。
可选地，第二信息中可以不包括第一补偿量信息，在这种情况下，网络设备可以通过发送其他信息，使得终端设备根据其他信息确定目标传播时延补偿方式对应的补偿量。可以理解的是，每个传播时延补偿周期对应的补偿量可能会发生变化，所以用于终端设备确定补偿量的信息的发送频率会高于用于指示目标传播时延补偿方式的信息，通过不同的信息来指示目标传播时延补偿方式和补偿量(显式指示或隐式指示)，能够降低信令开销。
如果目标传播时延补偿方式为基于TA的时延补偿方式，则目标传播时延补偿方式对应的补偿量为TA估计值。如果目标传播时延补偿方式为基于RTT的时延补偿方式，则目标传播时延补偿方式对应的补偿量为RTT测量值。可以理解的是，如果是由网络设备进行传播时延补偿，第二信息中不包括第一补偿量信息，终端设备在接收到第二信息之后，向网络设备发送RTT测量值，网络设备基于终端设备发送的RTT测量值进行传播时延补偿。
在本申请的一些实施例中，S320中的第二信息用于触发终端设备进行传播时延补偿，在这种情况下，如图5所示出的，在S320之后，图3所示的方法还包括：
S350，接收来自于网络设备的第四信息，第四信息中包括第二传播时延补偿方式指示信息，第二传播时延补偿方式指示信息用于指示目标传播时延补偿方式。
也就是说，如果第二信息仅用于触发终端设备进行传播时延补偿，网络设备可以通过向终端设备发送第四信息来指示目标传播时延补偿方式。
进一步地，第四信息中还可以包括第二补偿量信息，第二补偿量信息用于终端设备确定目标传播时延补偿方式对应的补偿量。通过使用一个信息使终端设备既可以确定目标传播时延补偿方式又可以确定目标传播时延补偿方式的方法，能够简化网络设备和终端设备的实现。
可选地，第四信息中可以不包括第二补偿量信息，在这种情况下，网络设备可以通过发送其他信息，使得终端设备根据其他信息确定目标传播时延补偿方式对应的补偿量。可以理解的是，每个传播时延补偿周期对应的补偿量可能会发生变化，所以用于终端设备确定补偿量的信息的发送频率会高于用于指示目标传播时延补偿方式的信息，通过不同的信息来指示目标传播时延补偿方式和补偿量(显式指示或隐式指示)，能够降低信令开销。
在上述图3至图5示出的实施例的基础上，在S320之前，本申请实施例的用于时间同步的方法还包括：
接收来自于网络设备的第五信息，第五信息用于配置终端设备的可用传播时延补偿方式，可用传播时延补偿方式包括目标传播时延补偿方式。
具体地，终端设备向网络设备发送指示终端设备支持的传播时延补偿方式的第一信息之后，网络设备会基于第一信息确定终端设备的可用传播时延补偿方式，并将终端设备的可用传播时延补偿方式配置给终端设备。或者，终端设备向网络设备发送指示终端设备支持的传播时延补偿方式的第一信息之后，终端设备向网络设备发送用于网络设备确定终端设备请求使用的传播时延补偿方式的第三信息，网络设备基于第一信息和第三信息确定终端设备的可用传播时延补偿方式，并将终端设备的可用传播时延补偿方式配置给终端设备。由网络设备基于终端设备的能力或者由网络设备基于终端设备的能力和请求确定终端设备的可用传播时延补偿方式，能够保障不同业务场景对时间同步精度的需求，从而满足不同业务场景对数据传输可靠性的需求。
举例来说，终端设备支持基于TA的时延补偿方式和基于RTT的时延补偿方式，终端设备请求使用基于TA的时延补偿方式，则网络设备配置终端设备的可用传播时延补偿方式为基于TA的时延补偿方式。如果终端设备请求使用基于RTT的时延补偿方式，则网络设备配置终端设备的可用传播时延补偿方式为基 于RTT的时延补偿方式。如果终端设备没有用于网络设备确定终端设备请求使用的传播时延补偿方式的信息，网络设备可以基于自身实现配置终端设备使用基于TA的时延补偿方式或使用基于RTT的时延补偿方式。
可以理解的是，网络设备配置的终端设备的可用传播时延补偿方式可以是一种也可以是多种，如果网络设备配置的可用传播时延补偿方式为多种，网络设备可以通过其他信息指示目标传播时延补偿方式，例如可以通过上述的第二信息来指示目标传播时延补偿方式。
进一步地，上述的第五信息还包括传播时延补偿周期信息和时间偏移信息中的至少一项。这里的传播时延补偿周期信息用于终端设备确定执行传播时延补偿的时间间隔(周期)，时间偏移信息用于终端设备确定传播时延补偿的时间(可以理解为，传播时延补偿的时刻)。例如，传播时延补偿周期信息指示传播时延补偿的时间间隔为20ms，时间偏移为5ms，则终端设备每隔20ms执行一次传播时延补偿，且执行传播时延补偿的时刻为每个20ms周期的开始时刻之后的第5ms处。
在本申请的一些实施例中，S320中的第二信息用于配置终端设备的可用传播时延补偿方式，所述可用传播时延补偿方式包括目标传播时延补偿方式。
具体地，终端设备在向网络设备发送第一信息之后，网络设备向终端设备发送第二信息，第二信息配置终端设备的可用传播时延补偿方式。或者终端设备在向网络设备发送第一信息之后，向网络设备发送用于网络设备确定终端设备请求使用的传播时延补偿方式的第三信息，之后网络设备向终端设备发送第二信息，通过第二信息配置终端设备的可用传播时延补偿方式。
可以理解的是，网络设备通过第二信息配置的终端设备的可用传播时延补偿方式可以是一种也可以是多种，如果网络设备配置的可用传播时延补偿方式为多种，网络设备可以通过其他信息指示目标传播时延补偿方式。
进一步地，在第二信息用于配置终端设备的可用传播时延补偿方式的情况下，第二信息中还包括传播时延补偿周期信息和时间偏移信息中的至少一项。这里的传播时延补偿周期信息用于终端设备确定执行传播时延补偿的时间间隔(周期)，时间偏移信息用于终端设备确定传播时延补偿的时间(可以理解为，传播时延补偿的时刻)。例如，传播时延补偿周期信息指示传播时延补偿的时间间隔为20ms，时间偏移为5ms，则终端设备每隔20ms执行一次传播时延补偿，且执行传播时延补偿的时刻为每个20ms周期的开始时刻之后的第5ms处。
可选地，在第二信息用于配置终端设备的可用传播时延补偿方式的情况下，目标传播时延补偿方式为终端设备支持的传播时延补偿方式中的一种，第二信息配置可用传播时延补偿方式为目标传播时延补偿方式。换言之，网络设备可以通过第二信息配置终端设备进行传播时延补偿所使用的目标传播时延补偿方式。
举例来说，目标传播时延补偿方式为基于TA的时延补偿方式，终端设备通过第一信息指示终端设备支持的传播时延补偿方式为基于TA的时延补偿方式，网络设备通过第二信息配置终端设备采用基于TA的时延补偿方式进行传播时延补偿。又例如，终端设备通过第一信息指示终端设备支持的传播时延补偿方式包括基于TA的时延补偿方式和基于RTT的时延补偿方式，网络设备通过第二信息配置终端设备采用基于RTT的时延补偿方式进行传播时延补偿。或者再例如，终端设备通过第一信息指示终端设备支持的传播时延补偿方式包括基于TA的时延补偿方式和基于RTT的时延补偿方式，终端设备通过第三信息指示终端设备请求使用的传播时延补偿方式为基于RTT的时延补偿方式，网络设备通过第二信息配置终端设备采用基于RTT的时延补偿方式进行传播时延补偿。
在本申请的一些实施例中，在S320中的第二信息用于配置终端设备的可用传播时延补偿方式的情况下，图3所示的用于时间同步的方法还包括：
接收来自于网络设备的第六信息，第六信息用于触发终端设备采用目标传播时延补偿方式进行时延补偿。
例如，终端设备在接收到配置可用传播时延补偿方式的第二信息之后，并不立即执行传播时延补偿，而是在网络设备触发终端设备进行传播时延补偿之后，开始按照第二信息的配置进行传播时延补偿。
可以理解的是，在第二信息配置终端设备的可用传播时延补偿方式包括至少两种传播时延补偿方式的情况下，第六信息可以通过指示该至少两种传播时延补偿方式中的一种传播时延补偿方式作为目标传播时延补偿方式的方式触发终端设备采用目标传播时延补偿方式进行传播时延补偿。
进一步地，第六信息中可以包括用于终端设备确定目标传播时延补偿方式对应的补偿量的信息。或者，如果第六信息中不包括用于终端设备确定目标传播时延补偿量的信息，网络设备向终端设备发送其他信息，使得终端设备根据该其他信息确定目标传播时延补偿方式对应的补偿量。例如，网络设备可以向终端设备发送第八信息，第八信息用于终端设备确定目标传播时延补偿方式对应的补偿量。通过不同的信息来指示目标传播时延补偿方式和补偿量(显式指示或隐式指示)，能够降低信令开销。
在本申请的一些实施例中，在S320中的第二信息用于配置终端设备的可用传播时延补偿方式的情况 下，图3所示的用于时间同步的方法还包括：
接收来自于网络设备的第七信息，第七信息用于指示目标传播时延补偿方式。
例如，网络设备在通过第二信息配置终端设备的可用传播时延补偿方式之后，会通过第七信息指示可用传播时延补偿方式中的一种作为目标传播时延补偿方式，使得终端设备采用第七信息指示的传播时延补偿方式进行传播时延补偿。
进一步地，第七信息中可以包括用于终端设备确定目标传播时延补偿方式对应的补偿量的信息。或者，如果第七信息中不包括用于终端设备确定目标传播时延补偿量的信息，网络设备向终端设备发送其他信息，使得终端设备根据该其他信息确定目标传播时延补偿方式对应的补偿量。例如，网络设备可以向终端设备发送第八信息，第八信息用于终端设备确定目标传播时延补偿方式对应的补偿量。通过不同的信息来指示目标传播时延补偿方式和补偿量(显式指示或隐式指示)，能够降低信令开销。
下面将结合具体的例子描述本申请实施例的用于时间同步的方法。图6是本申请实施例的用于时间同步的方法的一个例子。如图6所示出的，用于时间同步的方法包括：
S410，终端设备向网络设备发送能力信息。
在S410中，终端设备通过能力信息告知网络设备终端设备支持的传播时延补偿方式。可以理解的是，S410中的能力信息与上文中用于指示终端设备支持的传播时延补偿方式的第一信息相同。
S420，网络设备向终端设备发送第一指示信息。
在S420中，网络设备通过第一指示信息指示目标传播时延补偿方式并触发终端设备进行传播时延补偿。
可以理解的是，S420中的第一指示信息本质上与上文中描述的第二信息用于触发终端设备进行传播时延补偿和/或第二信息包括第一传播时延补偿方式指示信息的情况下的第二信息相同。
S430，网络设备向终端设备发送第二指示信息。
在S430中，网络设备通过第二指示信息向终端设备指示用于终端设备确定第一指示信息指示的目标传播时延补偿方式对应的补偿量的信息。
图7示出了本申请的另一个例子，如图7所示出的，用于时间同步的方法包括：
S510，终端设备向网络设备发送能力信息。
S510中的能力信息与S410中的能力信息相同。
S520，网络设备向终端设备发送配置信息。
在S520中，网络设备通过配置信息配置终端设备的可用传播时延补偿方式。可以理解的是，配置信息与上文中描述的第二信息用于配置终端设备的可用传播时延补偿方式的情况下的第二信息相同。
S530，网络设备向终端设备发送第一指示信息。
S530中的第一指示信息与S420中的第一指示信息相同。
S540，网络设备向终端设备发送第二指示信息。
在S540中，网络设备通过第二指示信息向终端设备指示用于终端设备确定第一指示信息指示的目标传播时延补偿方式对应的补偿量的信息。
图8示出了本申请的再一个例子，如图8所示出的，用于时间同步的方法包括：
S610，终端设备向网络设备发送能力信息。
S610中的能力信息与S410中的能力信息相同。
S620，终端设备向网络设备发送请求信息。
在S620中，终端设备通过请求信息告知网络设备要请求使用的传播时延补偿方式。可以理解的是，S620中的请求信息与上文中描述的用于网络设备确定终端设备请求使用的传播时延补偿方式的第三信息相同。
S630，网络设备向终端设备发送第一指示信息。
S630中的第一指示信息与S420中的第一指示信息相同。
S640，网络设备向终端设备发送第二指示信息。
在S640中，网络设备通过第二指示信息向终端设备指示用于终端设备确定第一指示信息指示的目标传播时延补偿方式对应的补偿量的信息。
图9示出了本申请的再一个例子，如图9所示出的，用于时间同步的方法包括：
S710，终端设备向网络设备发送能力信息。
S710中的能力信息与S410中的能力信息相同。
S720，网络设备向终端设备发送配置信息。
在S720中，网络设备通过S720中的配置信息配置终端设备进行传播时延补偿所采用的目标传播时延补偿方式，进一步地，配置信息中还可以包括传播时延补偿周期信息和时间偏移信息中的至少一项。传播 时延补偿周期信息用于终端设备确定执行传播时延补偿的时间间隔，时间偏移信息用于终端设备确定传播时延补偿的时间。
S730，网络设备向终端设备发送第二指示信息。
在S730中，网络设备通过第二指示信息向终端设备指示用于终端设备确定的目标传播时延补偿方式对应的补偿量的信息。
图10示出了本申请的再一个例子，如图10所示出的，用于时间同步的方法包括：
S810，终端设备向网络设备发送能力信息。
S810中的能力信息与S410中的能力信息相同。
S820，终端设备向网络设备发送请求信息。
S820中的请求信息与S620中的请求信息相同。例如，终端设备通过请求信息向网络设备请求使用基于TA的时延补偿方法或基于RTT的时延补偿方法。
S830，网络设备向终端设备发送第二指示信息。
在S830中，网络设备通过第二指示信息向终端设备指示用于终端设备确定的目标传播时延补偿方式对应的补偿量的信息。例如，如果终端设备通过请求信息向网络设备请求使用基于TA的时延补偿方法或基于RTT的时延补偿方法。网络设备通过第二指示信息指示TA估计值或RTT测量值。
图11是根据本申请的再一个例子，如图11所示，用于时间同步的方法包括：
S910，终端设备向网络设备发送能力信息。
S910中的能力信息与S410中的能力信息相同。
S920，网络设备向终端设备发送配置信息。
在S920中，网络设备通过配置信息配置终端设备的可用传播时延补偿方式。例如，在终端设备通过能力信息告知网络设备该终端设备支持两种传播时延补偿方式，网络设备通过配置信息配置终端设备的可用传播时延补偿方式为终端设备支持的两种传播时延补偿方式。进一步地，配置信息中还可以包括传播时延补偿周期信息和时间偏移信息中的至少一项。
S930，网络设备向终端设备发送第三指示信息。
在S930中网络设备通过第三指示信息指示目标传播时延补偿方式为配置信息配置的可用传播时延补偿方式中的一种。可以理解的是，S930中的第三指示信息与S420中的第一指示信息的区别在于：第一指示信息在一些情况下可以只具有触发终端设备进行传播时延补偿但不指示具体的传播时延补偿方式的功能，第三指示信息不具有触发功能，第三指示信息只具有指示具体的传播时延补偿方式的功能。
作为一个例子，在S930中，网络设备还可以先向终端设备发送S420中的第一指示信息，以触发终端设备进行传播时延补偿，之后再向终端设备发送第三指示信息，通过第三指示信息指示具体的传播时延补偿方式。
S940，网络设备向终端设备发送第二指示信息。
在S940中，网络设备通过第二指示信息向终端设备指示用于终端设备确定的目标传播时延补偿方式对应的补偿量的信息。例如，如果第三指示信息指示的目标传播时延补偿方式为基于TA的时延补偿方法或基于RTT的时延补偿方法。网络设备通过第二指示信息指示TA估计值或RTT测量值。
需要说明的是，在周期性传播时延补偿的情况下，每个周期内的补偿量可能会发生改变，所以网络设备在S940中可以向终端设备发送多条第二指示信息，以通知终端设备每个周期对应的补偿量。
图12是根据本申请的再一个例子，如图12所示，用于时间同步的方法包括：
S1010，终端设备向网络设备发送能力信息。
S1010中的能力信息与S410中的能力信息相同。
S1020，终端设备向网络设备发送请求信息。
S1020中的请求信息与S620中的请求信息相同。例如，终端设备通过请求信息向网络设备请求使用基于TA的时延补偿方法或基于RTT的时延补偿方法。
S1030，网络设备向终端设备发送配置信息。
在S1030中，网络设备通过配置信息配置终端设备的可用传播时延补偿方式。例如，在终端设备通过能力信息告知网络设备该终端设备支持两种传播时延补偿方式，网络设备通过配置信息配置终端设备的可用传播时延补偿方式为终端设备支持的两种传播时延补偿方式。进一步地，配置信息中还可以包括传播时延补偿周期信息和时间偏移信息中的至少一项。
S1040，网络设备向终端设备发送第三指示信息。
S1040中的第三指示信息与S930中的第三指示信息相同。
S1050，网络设备向终端设备发送第二指示信息。
S1050中的第二指示信息与S940中的第二指示信息相同。
需要说明的是，在周期性传播时延补偿的情况下，每个周期内的补偿量可能会发生改变，所以网络设备在S1050中可以向终端设备发送多条第二指示信息，以通知终端设备每个周期对应的补偿量。
进一步地，如果网络设备在某些情况下确定需要更换目标传播时延补偿方式，则网络设备再次向终端设备发送第三指示信息，之后再向终端设备发送第二指示信息。所以，如图12所示出的，网络设备可能向终端设备发送多次第三指示信息和第二指示信息。
图13是根据本申请的再一个例子，如图13所示，用于时间同步的方法包括：
S1110，终端设备向网络设备发送能力信息。
S1110中的能力信息与S410中的能力信息相同。
S1120，终端设备向网络设备发送请求信息。
S1120中的请求信息与S620中的请求信息相同。例如，终端设备通过请求信息向网络设备请求使用基于TA的时延补偿方法或基于RTT的时延补偿方法。
S1130，网络设备向终端设备发送第三指示信息。
S1130中的第三指示信息与S930中的第三指示信息相同。
S1140，网络设备向终端设备发送第二指示信息。
S1140中的第二指示信息与S940中的第二指示信息相同。
需要说明的是，如果网络设备在某些情况下确定需要更换目标传播时延补偿方式，则网络设备再次向终端设备发送第三指示信息，之后再向终端设备发送第二指示信息。所以，如图13所示出的，网络设备可能向终端设备发送多次第三指示信息和第二指示信息。
可以理解的是，在图6至图13所示的例子中，如果由网络设备执行传播时延补偿，则这些例子中的第二指示信息可以是由终端设备发送给网络设备的。例如，如果目标传播时延补偿方式为基于RTT的传播时延补偿方式，且由网络设备执行传播时延补偿，则终端设备向网络设备发送第二指示信息，指示RTT测量值，使得网络设备基于接收到的RTT测量值实现传播时延补偿。
以上结合附图主要从终端设备的角度描述了本申请实施例的用于时间同步的方法，下面将结合其他附图从网络设备的角度描述本申请实施例的用于时间同步的方法。可以理解的是，从网络设备侧描述网络设备与终端设备之间的交互与从终端设备侧描述的终端设备与网络设备的交互相同，为避免重复，适当省略相关描述。
图14是本申请实施例提供的再一用于时间同步的方法的流程示意图。图14所示的用于时间同步的方法可以应用于上述的通信系统中，并可具体应用于上述的网络设备中。如图14所示，该方法包括：
S1210，接收来自于终端设备的第一信息，所述第一信息用于指示所述终端设备支持的传播时延补偿方式。
S1220，向所述终端设备发送第二信息，所述第二信息用于所述终端设备根据与所述第二信息相关的目标传播时延补偿方式进行传播时延补偿；
其中，所述目标传播时延补偿方式为所述终端设备支持的传播时延补偿方式中的一种，或所述目标传播时延补偿方式为由所述终端设备自行决定传播时延补偿方式。
根据本申请实施例的用于时间同步的方法，网络设备在接收到指示终端设备支持的传播时延补偿方式的信息后，向终端设备发送第二信息，使得终端设备能够根据与第二信息相关的目标传播时延补偿方式进行传播时延补偿。通过网络设备与终端设备之间的信令交互，使得终端设备可以根据网络设备下发的信息确定要使用的传播时延补偿方式，并且根据该传播时延补偿方式进行传播时延补偿，能够保障不同业务场景对时间同步精度的需求，从而满足不同业务场景对数据传输可靠性的需求。
在本申请实施例中，可选地，所述目标传播时延补偿方式为所述终端设备支持的传播时延补偿方式中由所述终端设备请求使用的传播时延补偿方式中的一种；
其中，在向所述终端设备发送第二信息之前，图14所示的方法还包括：
接收来自于所述终端设备的第三信息，所述第三信息用于所述网络设备确定所述终端设备请求使用的传播时延补偿方式。
在本申请实施例中，可选地，所述第三信息指示所述目标传播时延补偿方式。
在本申请实施例中，可选地，所述第二信息用于触发所述终端设备进行传播时延补偿。
在本申请实施例中，可选地，所述第二信息中包括第一传播时延补偿方式指示信息，所述第一传播时延补偿方式指示信息用于指示所述目标传播时延补偿方式。
在本申请实施例中，可选地，所述第二信息中包括第一补偿量信息，所述第一补偿量信息用于所述终端设备确定所述目标传播时延补偿方式对应的补偿量。
在本申请实施例中，可选地，在所述向所述终端设备发送第二信息之后，图14所示的方法还包括：
向所述终端设备发送第四信息，所述第四信息中包括第二传播时延补偿方式指示信息，所述第二传播 时延补偿方式指示信息用于指示所述目标传播时延补偿方式。
在本申请实施例中，可选地，所述第四信息中还包括第二补偿量信息，所述第二补偿量信息用于所述终端设备确定所述目标传播时延补偿方式对应的补偿量。
在本申请实施例中，可选地，在向所述终端设备发送第二信息之前，图14所示的方法还包括：
向所述终端设备发送第五信息，所述第五信息用于配置所述终端设备的可用传播时延补偿方式，所述可用传播时延补偿方式包括所述目标传播时延补偿方式。
可以理解的是，如果终端设备通过向网络发送第三信息告知网络设备终端设备请求使用的传播时延补偿方式，网络设备在获取到终端设备支持的传播时延补偿方式和请求使用的传播时延补偿方式的基础上，基于这些信息确定终端设备的可用传播时延补偿方式，能够为当前的业务场景确定更为合适的时延补偿方式，从而保障不同业务场景对时间同步精度的需求，满足不同业务场景对数据传输可靠性的需求。
在本申请实施例中，可选地，所述第五信息还包括传播时延补偿周期信息和时间偏移信息中的至少一项。
在本申请实施例中，可选地，所述第二信息用于配置所述终端设备的可用传播时延补偿方式，所述可用传播时延补偿方式包括所述目标传播时延补偿方式。
在本申请实施例中，可选地，所述第二信息中还包括传播时延补偿周期信息和时间偏移信息中的至少一项。
在本申请实施例中，可选地，所述目标传播时延补偿方式为所述终端设备支持的传播时延补偿方式中的一种，所述第二信息配置所述可用传播时延补偿方式为所述目标传播时延补偿方式。
在本申请实施例中，可选地，图14所示的方法还包括：
向所述终端设备发送第六信息，所述第六信息用于触发所述终端设备采用所述目标传播时延补偿方式进行传播时延补偿。
在本申请实施例中，可选地，图14所示的方法还包括：
向所述终端设备发送第七信息，所述第七信息用于指示所述目标传播时延补偿方式。
在本申请实施例中，可选地，图14所示的方法还包括：
向所述终端设备发送第八信息，所述第八信息用于所述终端设备确定所述目标传播时延补偿方式对应的补偿量。
在本申请实施例中，可选地，所述终端设备支持的传播时延补偿方式包括第一传播时延补偿方式和第二传播时延补偿方式中的至少一种。
在本申请实施例中，可选地，所述第一传播时延补偿方式为基于时间提前TA的时延补偿方式，所述第二传播时延补偿方式为基于往返时间RTT的时延补偿方式。
以上结合附图描述了本申请实施例的用于时间同步的方法，下面将结合附图详细描述根据本申请实施例的终端设备和网络设备。
图15是根据本申请实施例的终端设备的结构示意图。如图15所示出的，终端设备包括：
收发模块1310，用于向网络设备发送第一信息，所述第一信息用于指示所述终端设备支持的传播时延补偿方式。
所述收发模块1310，还用于接收来自于所述网络设备的第二信息。
处理模块1320，用于根据与所述第二信息相关的目标传播时延补偿方式进行传播时延补偿；
其中，所述目标传播时延补偿方式为所述终端设备支持的传播时延补偿方式中的一种，或所述目标传播时延补偿方式为由所述终端设备自行决定传播时延补偿方式。
根据本申请实施例的终端设备，向网络设备发送指示终端设备支持的传播时延补偿方式的信息，并在接收到网络设备发送的第二信息后，根据与第二信息相关的目标传播时延补偿方式进行传播时延补偿，与第二信息相关的目标传播时延补偿方式为终端设备支持的传播时延补偿方式中的一种或为由终端设备自行决定传播时延补偿方式。终端设备通过与网络设备之间的信令交互，可以根据网络设备下发的信息确定要使用的传播时延补偿方式，并且根据该传播时延补偿方式进行传播时延补偿，能够保障不同业务场景对时间同步精度的需求，从而满足不同有任务场景对数据传输可靠性的需求。
在本申请实施例中，可选地，所述目标传播时延补偿方式为所述终端设备支持的传播时延补偿方式中由所述终端设备请求使用的传播时延补偿方式中的一种；
其中，在所述接收来自于所述网络设备的第二信息之前，所述收发模块1310还用于：
向所述网络设备发送第三信息，所述第三信息用于所述网络设备确定所述终端设备请求使用的传播时延补偿方式。
在本申请实施例中，可选地，所述第三信息指示所述目标传播时延补偿方式。
在本申请实施例中，可选地，所述第二信息用于触发所述终端设备进行传播时延补偿。
在本申请实施例中，可选地，所述第二信息中包括第一传播时延补偿方式指示信息，所述第一传播时延补偿方式指示信息用于指示所述目标传播时延补偿方式。
在本申请实施例中，可选地，所述第二信息中包括第一补偿量信息，所述第一补偿量信息用于所述终端设备确定所述目标传播时延补偿方式对应的补偿量。
在本申请实施例中，可选地，在所述接收来自于所述网络设备的第二信息之后，所述收发模块1310还用于：
接收来自于所述网络设备的第四信息，所述第四信息中包括第二传播时延补偿方式指示信息，所述第二传播时延补偿方式指示信息用于指示所述目标传播时延补偿方式。
在本申请实施例中，可选地，所述第四信息中还包括第二补偿量信息，所述第二补偿量信息用于所述终端设备确定所述目标传播时延补偿方式对应的补偿量。
在本申请实施例中，可选地，在所述接收来自于所述网络设备的第二信息之前，所述收发模块1310还用于：
接收来自于所述网络设备的第五信息，所述第五信息用于配置所述终端设备的可用传播时延补偿方式，所述可用传播时延补偿方式包括所述目标传播时延补偿方式。
在本申请实施例中，可选地，所述第五信息还包括传播时延补偿周期信息和时间偏移信息中的至少一项。
在本申请实施例中，可选地，所述第二信息用于配置所述终端设备的可用传播时延补偿方式，所述可用传播时延补偿方式包括所述目标传播时延补偿方式。
在本申请实施例中，可选地，所述第二信息中还包括传播时延补偿周期信息和时间偏移信息中的至少一项。
在本申请实施例中，可选地，所述目标传播时延补偿方式为所述终端设备支持的传播时延补偿方式中的一种，所述第二信息配置所述可用传播时延补偿方式为所述目标传播时延补偿方式。
在本申请实施例中，可选地，所述收发模块1310还用于：
接收来自于所述网络设备的第六信息，所述第六信息用于触发所述终端设备采用所述目标传播时延补偿方式进行传播时延补偿。
在本申请实施例中，可选地，所述收发模块1310还用于：
接收来自于所述网络设备的第七信息，所述第七信息用于指示所述目标传播时延补偿方式。
在本申请实施例中，可选地，所述收发模块1310还用于：
接收来自于所述网络设备的第八信息，所述第八信息用于所述终端设备确定所述目标传播时延补偿方式对应的补偿量。
在本申请实施例中，可选地，所述终端设备支持的传播时延补偿方式包括第一传播时延补偿方式和第二传播时延补偿方式中的至少一种。
在本申请实施例中，可选地，所述第一传播时延补偿方式为基于时间提前TA的时延补偿方式，所述第二传播时延补偿方式为基于往返时间RTT的时延补偿方式。
图15所示的终端设备可以实现本申请实施例的各个方法中由终端设备实现的相应流程，为了简洁，在此不再赘述。
图16是根据本申请实施例的网络设备的结构示意图。如图16所示出的，网络设备包括：
接收模块1410，用于接收来自于终端设备的第一信息，所述第一信息用于指示所述终端设备支持的传播时延补偿方式；
发送模块1420，用于向所述终端设备发送第二信息，所述第二信息用于所述终端设备根据与所述第二信息相关的目标传播时延补偿方式进行传播时延补偿；
其中，所述目标传播时延补偿方式为所述终端设备支持的传播时延补偿方式中的一种，或所述目标传播时延补偿方式为由所述终端设备自行决定传播时延补偿方式。
根据本申请实施例的网络设备，在接收到终端设备发送的指示终端设备支持的传播时延补偿方式的信息后，像终端设备发送第二信息，使得终端设备根据与第二信息相关的目标传播时延补偿方式进行传播时延补偿，与第二信息相关的目标传播时延补偿方式为终端设备支持的传播时延补偿方式中的一种或为由终端设备自行决定传播时延补偿方式。网络设备通过与终端设备之间的信令交互，使得终端设备可以根据网络设备下发的信息确定要使用的传播时延补偿方式，并且根据该传播时延补偿方式进行传播时延补偿，能够保障不同业务场景对时间同步精度的需求，从而满足不同有任务场景对数据传输可靠性的需求。
在本申请实施例中，可选地，所述目标传播时延补偿方式为所述终端设备支持的传播时延补偿方式中由所述终端设备请求使用的传播时延补偿方式中的一种；
其中，在向所述终端设备发送第二信息之前，所述接收模块1410还用于：
接收来自于所述终端设备的第三信息，所述第三信息用于所述网络设备确定所述终端设备请求使用的传播时延补偿方式。
在本申请实施例中，可选地，所述第三信息指示所述目标传播时延补偿方式。
在本申请实施例中，可选地，所述第二信息用于触发所述终端设备进行传播时延补偿。
在本申请实施例中，可选地，所述第二信息中包括第一传播时延补偿方式指示信息，所述第一传播时延补偿方式指示信息用于指示所述目标传播时延补偿方式。
在本申请实施例中，可选地，所述第二信息中包括第一补偿量信息，所述第一补偿量信息用于所述终端设备确定所述目标传播时延补偿方式对应的补偿量。
在本申请实施例在所述向所述终端设备发送第二信息之后，所述发送模块1420还用于：
向所述终端设备发送第四信息，所述第四信息中包括第二传播时延补偿方式指示信息，所述第二传播时延补偿方式指示信息用于指示所述目标传播时延补偿方式。
在本申请实施例中，可选地，所述第四信息中还包括第二补偿量信息，所述第二补偿量信息用于所述终端设备确定所述目标传播时延补偿方式对应的补偿量。
在本申请实施例中，可选地，在向所述终端设备发送第二信息之前，所述发送模块1420还用于：
向所述终端设备发送第五信息，所述第五信息用于配置所述终端设备的可用传播时延补偿方式，所述可用传播时延补偿方式包括所述目标传播时延补偿方式。
在本申请实施例中，可选地，所述第五信息还包括传播时延补偿周期信息和时间偏移信息中的至少一项。
在本申请实施例中，可选地，其特征在于，所述第二信息用于配置所述终端设备的可用传播时延补偿方式，所述可用传播时延补偿方式包括所述目标传播时延补偿方式。
在本申请实施例中，可选地，所述第二信息中还包括传播时延补偿周期信息和时间偏移信息中的至少一项。
在本申请实施例中，可选地，所述目标传播时延补偿方式为所述终端设备支持的传播时延补偿方式中的一种，所述第二信息配置所述可用传播时延补偿方式为所述目标传播时延补偿方式。
在本申请实施例中，可选地，所述发送模块1420还用于：
向所述终端设备发送第六信息，所述第六信息用于触发所述终端设备采用所述目标传播时延补偿方式进行传播时延补偿。
在本申请实施例中，可选地，所述发送模块1420还用于：
向所述终端设备发送第七信息，所述第七信息用于指示所述目标传播时延补偿方式。
在本申请实施例中，可选地，所述发送模块1420还用于：
向所述终端设备发送第八信息，所述第八信息用于所述终端设备确定所述目标传播时延补偿方式对应的补偿量。
在本申请实施例中，可选地，所述终端设备支持的传播时延补偿方式包括第一传播时延补偿方式和第二传播时延补偿方式中的至少一种。
在本申请实施例中，可选地，所述第一传播时延补偿方式为基于时间提前TA的时延补偿方式，所述第二传播时延补偿方式为基于往返时间RTT的时延补偿方式。
图16所示的网络设备可以实现本申请实施例的各个方法中由网络设备实现的相应流程，为了简洁，在此不再赘述。
图17是本申请实施例提供的另一种终端设备的结构示意图。如图17所示，该终端设备可包括：处理器1510、存储器1520和收发器1530，处理器1510可以从存储器1520中调用并运行计算机程序，以实现本申请实施例中的方法。
存储器1520可以是独立于处理器1510的一个单独的器件，也可以集成在处理器1510中。处理器1510可以控制收发器1530与其他设备进行通信，具体地，可以向其他设备发送信息或数据，或接收其他设备发送的信息或数据。
收发器1530可以包括发射机和接收机，收发器1530还可以进一步包括天线，天线的数量可以是一个或多个。
图17所示的终端设备可以实现本申请实施例的各个方法中由终端设备实现的相应流程，为了简洁，在此不再赘述。
图18是本申请实施例提供的另一种网络设备的结构示意图。如图18所示，该网络设备可包括：处理器1610、存储器1620和收发器1630，处理器1610可以从存储器1620中调用并运行计算机程序，以实现本申请实施例中的方法。
存储器1620可以是独立于处理器1610的一个单独的器件，也可以集成在处理器1610中。处理器1610 可以控制收发器1630与其他设备进行通信，具体地，可以向其他设备发送信息或数据，或接收其他设备发送的信息或数据。
收发器1630可以包括发射机和接收机，收发器1630还可以进一步包括天线，天线的数量可以是一个或多个。
图18所示的网络设备可以实现本申请实施例的各个方法中由网络设备实现的相应流程，为了简洁，在此不再赘述。
应理解，本申请实施例的处理器可能是一种集成电路芯片，具有信号的处理能力。在实现过程中，上述方法实施例的各步骤可以通过处理器中的硬件的集成逻辑电路或者软件形式的指令完成。上述的处理器可以是通用处理器、数字信号处理器(Digital Signal Processor，DSP)、专用集成电路(Application Specific Integrated Circuit，ASIC)、现成可编程门阵列(Field Programmable Gate Array，FPGA)或者其他可编程逻辑器件、分立门或者晶体管逻辑器件、分立硬件组件。可以实现或者执行本申请实施例中的公开的各方法、步骤及逻辑框图。通用处理器可以是微处理器或者该处理器也可以是任何常规的处理器等。结合本申请实施例所公开的方法的步骤可以直接体现为硬件译码处理器执行完成，或者用译码处理器中的硬件及软件模块组合执行完成。软件模块可以位于随机存储器，闪存、只读存储器，可编程只读存储器或者电可擦写可编程存储器、寄存器等本领域成熟的存储介质中。该存储介质位于存储器，处理器读取存储器中的信息，结合其硬件完成上述方法的步骤。
可以理解，本申请实施例中的存储器可以是易失性存储器或非易失性存储器，或可包括易失性和非易失性存储器两者。其中，非易失性存储器可以是只读存储器(Read-Only Memory，ROM)、可编程只读存储器(Programmable ROM，PROM)、可擦除可编程只读存储器(Erasable PROM，EPROM)、电可擦除可编程只读存储器(Electrically EPROM，EEPROM)或闪存。易失性存储器可以是随机存取存储器(Random Access Memory，RAM)，其用作外部高速缓存。通过示例性但不是限制性说明，许多形式的RAM可用，例如静态随机存取存储器(Static RAM，SRAM)、动态随机存取存储器(Dynamic RAM，DRAM)、同步动态随机存取存储器(Synchronous DRAM，SDRAM)、双倍数据速率同步动态随机存取存储器(Double Data Rate SDRAM，DDR SDRAM)、增强型同步动态随机存取存储器(Enhanced SDRAM，ESDRAM)、同步连接动态随机存取存储器(Synchlink DRAM，SLDRAM)和直接内存总线随机存取存储器(Direct Rambus RAM，DR RAM)。应注意，本文描述的系统和方法的存储器旨在包括但不限于这些和任意其它适合类型的存储器。
图19是根据本申请实施例的芯片的结构示意图。图19所示的芯片1700包括处理器1710，处理器1710可以从存储器1720中调用并运行计算机程序，以实现本申请实施例中的方法。
可选地，如图19所示，芯片1700还可以包括存储器1720。其中，处理器1710可以从存储器1720中调用并运行计算机程序，以实现本申请实施例中的方法。
其中，存储器1720可以是独立于处理器1710的一个单独的器件，也可以集成在处理器1710中。
可选地，该芯片1700还可以包括输入接口1730。其中，处理器1710可以控制该输入接口1730与其他设备或芯片进行通信，具体地，可以获取其他设备或芯片发送的信息或数据。
可选地，该芯片1700还可以包括输出接口1740。其中，处理器1710可以控制该输出接口1740与其他设备或芯片进行通信，具体地，可以向其他设备或芯片输出信息或数据。
可选地，该芯片可应用于本申请实施例中的终端设备/网络设备，并且该芯片可以实现本申请实施例的各个方法中由终端设备/网络设备实现的相应流程，为了简洁，在此不再赘述。
应理解，本申请实施例提到的芯片还可以称为系统级芯片，系统芯片，芯片系统或片上系统芯片等。
图20是本申请实施例提供的一种通信系统的示意图。如图20所示，该通信系统包括终端设备和网络设备。
其中，该终端设备可以用于实现上述方法中由终端设备实现的相应的功能，以及该网络设备可以用于实现上述方法中由网络设备实现的相应的功能，为了简洁，在此不再赘述。
本申请实施例还提供了一种计算机可读存储介质，其中，所述计算机可读存储介质存储用于电子数据交换的计算机程序，其中，所述计算机程序使得终端设备或网络设备执行如上述方法实施例中终端设备或网络设备所描述的部分或全部步骤。
本申请实施例还提供了一种计算机程序产品，其中，所述计算机程序产品包括存储了计算机程序的非瞬时性计算机可读存储介质，所述计算机程序可操作来使终端设备或网络设备执行如上述方法实施例中终端或网络设备所描述的部分或全部步骤。该计算机程序产品可以为一个软件安装包。
本领域普通技术人员可以意识到，结合本文中所公开的实施例描述的各示例的单元及算法步骤，能够以电子硬件、或者计算机软件和电子硬件的结合来实现。这些功能究竟以硬件还是软件方式来执行，取决于技术方案的特定应用和设计约束条件。专业技术人员可以对每个特定的应用来使用不同方法来实现所描 述的功能，但是这种实现不应认为超出本申请的范围。
所属领域的技术人员可以清楚地了解到，为描述的方便和简洁，上述描述的系统、装置和单元的具体工作过程，可以参考前述方法实施例中的对应过程，在此不再赘述。
在本申请所提供的几个实施例中，应该理解到，所揭露的系统、装置和方法，可以通过其它的方式实现。例如，以上所描述的装置实施例仅仅是示意性的，例如，所述单元的划分，仅仅为一种逻辑功能划分，实际实现时可以有另外的划分方式，例如多个单元或组件可以结合或者可以集成到另一个系统，或一些特征可以忽略，或不执行。另一点，所显示或讨论的相互之间的耦合或直接耦合或通信连接可以是通过一些接口，装置或单元的间接耦合或通信连接，可以是电性，机械或其它的形式。
所述作为分离部件说明的单元可以是或者也可以不是物理上分开的，作为单元显示的部件可以是或者也可以不是物理单元，即可以位于一个地方，或者也可以分布到多个网络单元上。可以根据实际的需要选择其中的部分或者全部单元来实现本实施例方案的目的。
另外，在本申请各个实施例中的各功能单元可以集成在一个处理单元中，也可以是各个单元单独物理存在，也可以两个或两个以上单元集成在一个单元中。
所述功能如果以软件功能单元的形式实现并作为独立的产品销售或使用时，可以存储在一个计算机可读取存储介质中。基于这样的理解，本申请的技术方案本质上或者说对现有技术做出贡献的部分或者该技术方案的部分可以以软件产品的形式体现出来，该计算机软件产品存储在一个存储介质中，包括若干指令用以使得一台计算机设备(可以是个人计算机，服务器，或者网络设备等)执行本申请各个实施例所述方法的全部或部分步骤。而前述的存储介质包括：U盘、移动硬盘、只读存储器(Read-Only Memory，)ROM、随机存取存储器(Random Access Memory，RAM)、磁碟或者光盘等各种可以存储程序代码的介质。
以上所述，仅为本申请的具体实施方式，但本申请的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本申请揭露的技术范围内，可轻易想到变化或替换，都应涵盖在本申请的保护范围之内。因此，本申请的保护范围应所述以权利要求的保护范围为准。

Claims (76)

  1. 一种用于时间同步的方法，应用于终端设备，其特征在于，所述方法包括：
    向网络设备发送第一信息，所述第一信息用于指示所述终端设备支持的传播时延补偿方式；
    接收来自于所述网络设备的第二信息；
    根据与所述第二信息相关的目标传播时延补偿方式进行传播时延补偿；
    其中，所述目标传播时延补偿方式为所述终端设备支持的传播时延补偿方式中的一种，或所述目标传播时延补偿方式为由所述终端设备自行决定传播时延补偿方式。
  2. 根据权利要求1所述的方法，其特征在于，所述目标传播时延补偿方式为所述终端设备支持的传播时延补偿方式中由所述终端设备请求使用的传播时延补偿方式中的一种；
    其中，在所述接收来自于所述网络设备的第二信息之前，所述方法还包括：
    向所述网络设备发送第三信息，所述第三信息用于所述网络设备确定所述终端设备请求使用的传播时延补偿方式。
  3. 根据权利要求2所述的方法，其特征在于，所述第三信息指示所述目标传播时延补偿方式。
  4. 根据权利要求1至3中任一项所述的方法，其特征在于，所述第二信息用于触发所述终端设备进行传播时延补偿。
  5. 根据权利要求1至4中任一项所述的方法，其特征在于，所述第二信息中包括第一传播时延补偿方式指示信息，所述第一传播时延补偿方式指示信息用于指示所述目标传播时延补偿方式。
  6. 根据权利要求5所述的方法，其特征在于，所述第二信息中包括第一补偿量信息，所述第一补偿量信息用于所述终端设备确定所述目标传播时延补偿方式对应的补偿量。
  7. 根据权利要求4所述的方法，其特征在于，在所述接收来自于所述网络设备的第二信息之后，所述方法还包括：
    接收来自于所述网络设备的第四信息，所述第四信息中包括第二传播时延补偿方式指示信息，所述第二传播时延补偿方式指示信息用于指示所述目标传播时延补偿方式。
  8. 根据权利要求7所述的方法，其特征在于，所述第四信息中还包括第二补偿量信息，所述第二补偿量信息用于所述终端设备确定所述目标传播时延补偿方式对应的补偿量。
  9. 根据权利要求4至8中任一项所述的方法，其特征在于，在所述接收来自于所述网络设备的第二信息之前，所述方法还包括：
    接收来自于所述网络设备的第五信息，所述第五信息用于配置所述终端设备的可用传播时延补偿方式，所述可用传播时延补偿方式包括所述目标传播时延补偿方式。
  10. 根据权利要求9所述的方法，其特征在于，所述第五信息还包括传播时延补偿周期信息和时间偏移信息中的至少一项。
  11. 根据权利要求1至3中任一项所述的方法，其特征在于，所述第二信息用于配置所述终端设备的可用传播时延补偿方式，所述可用传播时延补偿方式包括所述目标传播时延补偿方式。
  12. 根据权利要求11所述的方法，其特征在于，所述第二信息中还包括传播时延补偿周期信息和时间偏移信息中的至少一项。
  13. 根据权利要求11或12所述的方法，其特征在于，所述目标传播时延补偿方式为所述终端设备支持的传播时延补偿方式中的一种，所述第二信息配置所述可用传播时延补偿方式为所述目标传播时延补偿方式。
  14. 根据权利要求13所述的方法，其特征在于，所述方法还包括：
    接收来自于所述网络设备的第六信息，所述第六信息用于触发所述终端设备采用所述目标传播时延补偿方式进行传播时延补偿。
  15. 根据权利要求11或12所述的方法，其特征在于，所述方法还包括：
    接收来自于所述网络设备的第七信息，所述第七信息用于指示所述目标传播时延补偿方式。
  16. 根据权利要求2至5、7和9至15中任一项所述的方法，其特征在于，所述方法还包括：
    接收来自于所述网络设备的第八信息，所述第八信息用于所述终端设备确定所述目标传播时延补偿方式对应的补偿量。
  17. 根据权利要求1至16中任一项所述的方法，其特征在于，所述终端设备支持的传播时延补偿方式包括第一传播时延补偿方式和第二传播时延补偿方式中的至少一种。
  18. 根据权利要求17所述的方法，其特征在于，所述第一传播时延补偿方式为基于时间提前TA的时延补偿方式，所述第二传播时延补偿方式为基于往返时间RTT的时延补偿方式。
  19. 一种用于时间同步的方法，应用于网络设备，其特征在于，所述方法包括：
    接收来自于终端设备的第一信息，所述第一信息用于指示所述终端设备支持的传播时延补偿方式；
    向所述终端设备发送第二信息，所述第二信息用于所述终端设备根据与所述第二信息相关的目标传播时延补偿方式进行传播时延补偿；
    其中，所述目标传播时延补偿方式为所述终端设备支持的传播时延补偿方式中的一种，或所述目标传播时延补偿方式为由所述终端设备自行决定传播时延补偿方式。
  20. 根据权利要求19所述的方法，其特征在于，所述目标传播时延补偿方式为所述终端设备支持的传播时延补偿方式中由所述终端设备请求使用的传播时延补偿方式中的一种；
    其中，在向所述终端设备发送第二信息之前，所述方法还包括：
    接收来自于所述终端设备的第三信息，所述第三信息用于所述网络设备确定所述终端设备请求使用的传播时延补偿方式。
  21. 根据权利要求20所述的方法，其特征在于，所述第三信息指示所述目标传播时延补偿方式。
  22. 根据权利要求19至21中任一项所述的方法，其特征在于，所述第二信息用于触发所述终端设备进行传播时延补偿。
  23. 根据权利要求19至22中任一项所述的方法，其特征在于，所述第二信息中包括第一传播时延补偿方式指示信息，所述第一传播时延补偿方式指示信息用于指示所述目标传播时延补偿方式。
  24. 根据权利要求23所述的方法，其特征在于，所述第二信息中包括第一补偿量信息，所述第一补偿量信息用于所述终端设备确定所述目标传播时延补偿方式对应的补偿量。
  25. 根据权利要求22所述的方法，其特征在于，在所述向所述终端设备发送第二信息之后，所述方法还包括：
    向所述终端设备发送第四信息，所述第四信息中包括第二传播时延补偿方式指示信息，所述第二传播时延补偿方式指示信息用于指示所述目标传播时延补偿方式。
  26. 根据权利要求25所述的方法，其特征在于，所述第四信息中还包括第二补偿量信息，所述第二补偿量信息用于所述终端设备确定所述目标传播时延补偿方式对应的补偿量。
  27. 根据权利要求22至26中任一项所述的方法，其特征在于，在向所述终端设备发送第二信息之前，所述方法还包括：
    向所述终端设备发送第五信息，所述第五信息用于配置所述终端设备的可用传播时延补偿方式，所述可用传播时延补偿方式包括所述目标传播时延补偿方式。
  28. 根据权利要求27所述的方法，其特征在于，所述第五信息还包括传播时延补偿周期信息和时间偏移信息中的至少一项。
  29. 根据权利要求19至21中任一项所述的方法，其特征在于，所述第二信息用于配置所述终端设备的可用传播时延补偿方式，所述可用传播时延补偿方式包括所述目标传播时延补偿方式。
  30. 根据权利要求29所述的方法，其特征在于，所述第二信息中还包括传播时延补偿周期信息和时间偏移信息中的至少一项。
  31. 根据权利要求29或30所述的方法，其特征在于，所述目标传播时延补偿方式为所述终端设备支持的传播时延补偿方式中的一种，所述第二信息配置所述可用传播时延补偿方式为所述目标传播时延补偿方式。
  32. 根据权利要求31所述的方法，其特征在于，所述方法还包括：
    向所述终端设备发送第六信息，所述第六信息用于触发所述终端设备采用所述目标传播时延补偿方式进行传播时延补偿。
  33. 根据权利要求29或30所述的方法，其特征在于，所述方法还包括：
    向所述终端设备发送第七信息，所述第七信息用于指示所述目标传播时延补偿方式。
  34. 根据权利要求20至23、25和27至33中任一项所述的方法，其特征在于，所述方法还包括：
    向所述终端设备发送第八信息，所述第八信息用于所述终端设备确定所述目标传播时延补偿方式对应的补偿量。
  35. 根据权利要求19至34中任一项所述的方法，其特征在于，所述终端设备支持的传播时延补偿方式包括第一传播时延补偿方式和第二传播时延补偿方式中的至少一种。
  36. 根据权利要求35所述的方法，其特征在于，所述第一传播时延补偿方式为基于时间提前TA的时延补偿方式，所述第二传播时延补偿方式为基于往返时间RTT的时延补偿方式。
  37. 一种终端设备，其特征在于，所述终端设备包括：
    收发模块，用于向网络设备发送第一信息，所述第一信息用于指示所述终端设备支持的传播时延补偿方式；
    所述收发模块，还用于接收来自于所述网络设备的第二信息；
    处理模块，用于根据与所述第二信息相关的目标传播时延补偿方式进行传播时延补偿；
    其中，所述目标传播时延补偿方式为所述终端设备支持的传播时延补偿方式中的一种，或所述目标传播时延补偿方式为由所述终端设备自行决定传播时延补偿方式。
  38. 根据权利要求37所述的终端设备，其特征在于，所述目标传播时延补偿方式为所述终端设备支持的传播时延补偿方式中由所述终端设备请求使用的传播时延补偿方式中的一种；
    其中，在所述接收来自于所述网络设备的第二信息之前，所述收发模块还用于：
    向所述网络设备发送第三信息，所述第三信息用于所述网络设备确定所述终端设备请求使用的传播时延补偿方式。
  39. 根据权利要求38所述的终端设备，其特征在于，所述第三信息指示所述目标传播时延补偿方式。
  40. 根据权利要求37至39中任一项所述的终端设备，其特征在于，所述第二信息用于触发所述终端设备进行传播时延补偿。
  41. 根据权利要求37至40中任一项所述的终端设备，其特征在于，所述第二信息中包括第一传播时延补偿方式指示信息，所述第一传播时延补偿方式指示信息用于指示所述目标传播时延补偿方式。
  42. 根据权利要求41所述的终端设备，其特征在于，所述第二信息中包括第一补偿量信息，所述第一补偿量信息用于所述终端设备确定所述目标传播时延补偿方式对应的补偿量。
  43. 根据权利要求40所述的终端设备，其特征在于，在所述接收来自于所述网络设备的第二信息之后，所述收发模块还用于：
    接收来自于所述网络设备的第四信息，所述第四信息中包括第二传播时延补偿方式指示信息，所述第二传播时延补偿方式指示信息用于指示所述目标传播时延补偿方式。
  44. 根据权利要求43所述的终端设备，其特征在于，所述第四信息中还包括第二补偿量信息，所述第二补偿量信息用于所述终端设备确定所述目标传播时延补偿方式对应的补偿量。
  45. 根据权利要求37至44中任一项所述的终端设备，其特征在于，在所述接收来自于所述网络设备的第二信息之前，所述收发模块还用于：
    接收来自于所述网络设备的第五信息，所述第五信息用于配置所述终端设备的可用传播时延补偿方式，所述可用传播时延补偿方式包括所述目标传播时延补偿方式。
  46. 根据权利要求45所述的终端设备，其特征在于，所述第五信息还包括传播时延补偿周期信息和时间偏移信息中的至少一项。
  47. 根据权利要求37至39中任一项所述的终端设备，其特征在于，所述第二信息用于配置所述终端设备的可用传播时延补偿方式，所述可用传播时延补偿方式包括所述目标传播时延补偿方式。
  48. 根据权利要求47所述的终端设备，其特征在于，所述第二信息中还包括传播时延补偿周期信息和时间偏移信息中的至少一项。
  49. 根据权利要求47或48所述的终端设备，其特征在于，所述目标传播时延补偿方式为所述终端设备支持的传播时延补偿方式中的一种，所述第二信息配置所述可用传播时延补偿方式为所述目标传播时延补偿方式。
  50. 根据权利要求49所述的终端设备，其特征在于，所述收发模块还用于：
    接收来自于所述网络设备的第六信息，所述第六信息用于触发所述终端设备采用所述目标传播时延补偿方式进行传播时延补偿。
  51. 根据权利要求47或48所述的终端设备，其特征在于，所述收发模块还用于：
    接收来自于所述网络设备的第七信息，所述第七信息用于指示所述目标传播时延补偿方式。
  52. 根据权利要求38至41、43和45至51中任一项所述的终端设备，其特征在于，所述收发模块还用于：
    接收来自于所述网络设备的第八信息，所述第八信息用于所述终端设备确定所述目标传播时延补偿方式对应的补偿量。
  53. 根据权利要求37至52中任一项所述的终端设备，其特征在于，所述终端设备支持的传播时延补偿方式包括第一传播时延补偿方式和第二传播时延补偿方式中的至少一种。
  54. 根据权利要求53所述的终端设备，其特征在于，所述第一传播时延补偿方式为基于时间提前TA的时延补偿方式，所述第二传播时延补偿方式为基于往返时间RTT的时延补偿方式。
  55. 一种网络设备，其特征在于，所述网络设备包括：
    接收模块，用于接收来自于终端设备的第一信息，所述第一信息用于指示所述终端设备支持的传播时延补偿方式；
    发送模块，用于向所述终端设备发送第二信息，所述第二信息用于所述终端设备根据与所述第二信息 相关的目标传播时延补偿方式进行传播时延补偿；
    其中，所述目标传播时延补偿方式为所述终端设备支持的传播时延补偿方式中的一种，或所述目标传播时延补偿方式为由所述终端设备自行决定传播时延补偿方式。
  56. 根据权利要求55所述的网络设备，其特征在于，所述目标传播时延补偿方式为所述终端设备支持的传播时延补偿方式中由所述终端设备请求使用的传播时延补偿方式中的一种；
    其中，在向所述终端设备发送第二信息之前，所述接收模块还用于：
    接收来自于所述终端设备的第三信息，所述第三信息用于所述网络设备确定所述终端设备请求使用的传播时延补偿方式。
  57. 根据权利要求56所述的网络设备，其特征在于，所述第三信息指示所述目标传播时延补偿方式。
  58. 根据权利要求55至57中任一项所述的网络设备，其特征在于，所述第二信息用于触发所述终端设备进行传播时延补偿。
  59. 根据权利要求55至58中任一项所述的网络设备，其特征在于，所述第二信息中包括第一传播时延补偿方式指示信息，所述第一传播时延补偿方式指示信息用于指示所述目标传播时延补偿方式。
  60. 根据权利要求59所述的网络设备，其特征在于，所述第二信息中包括第一补偿量信息，所述第一补偿量信息用于所述终端设备确定所述目标传播时延补偿方式对应的补偿量。
  61. 根据权利要求58所述的网络设备，其特征在于，在所述向所述终端设备发送第二信息之后，所述发送模块还用于：
    向所述终端设备发送第四信息，所述第四信息中包括第二传播时延补偿方式指示信息，所述第二传播时延补偿方式指示信息用于指示所述目标传播时延补偿方式。
  62. 根据权利要求61所述的网络设备，其特征在于，所述第四信息中还包括第二补偿量信息，所述第二补偿量信息用于所述终端设备确定所述目标传播时延补偿方式对应的补偿量。
  63. 根据权利要求58至62中任一项所述的网络设备，其特征在于，在向所述终端设备发送第二信息之前，所述发送模块还用于：
    向所述终端设备发送第五信息，所述第五信息用于配置所述终端设备的可用传播时延补偿方式，所述可用传播时延补偿方式包括所述目标传播时延补偿方式。
  64. 根据权利要求63所述的网络设备，其特征在于，所述第五信息还包括传播时延补偿周期信息和时间偏移信息中的至少一项。
  65. 根据权利要求55至57中任一项所述的网络设备，其特征在于，所述第二信息用于配置所述终端设备的可用传播时延补偿方式，所述可用传播时延补偿方式包括所述目标传播时延补偿方式。
  66. 根据权利要求65所述的网络设备，其特征在于，所述第二信息中还包括传播时延补偿周期信息和时间偏移信息中的至少一项。
  67. 根据权利要求65或66所述的网络设备，其特征在于，所述目标传播时延补偿方式为所述终端设备支持的传播时延补偿方式中的一种，所述第二信息配置所述可用传播时延补偿方式为所述目标传播时延补偿方式。
  68. 根据权利要求67所述的网络设备，其特征在于，所述发送模块还用于：
    向所述终端设备发送第六信息，所述第六信息用于触发所述终端设备采用所述目标传播时延补偿方式进行传播时延补偿。
  69. 根据权利要求65或66所述的网络设备，其特征在于，所述发送模块还用于：
    向所述终端设备发送第七信息，所述第七信息用于指示所述目标传播时延补偿方式。
  70. 根据权利要求56至59、61和63至69中任一项所述的网络设备，其特征在于，所述发送模块还用于：
    向所述终端设备发送第八信息，所述第八信息用于所述终端设备确定所述目标传播时延补偿方式对应的补偿量。
  71. 根据权利要求55至70中任一项所述的网络设备，其特征在于，所述终端设备支持的传播时延补偿方式包括第一传播时延补偿方式和第二传播时延补偿方式中的至少一种。
  72. 根据权利要求71所述的网络设备，其特征在于，所述第一传播时延补偿方式为基于时间提前TA的时延补偿方式，所述第二传播时延补偿方式为基于往返时间RTT的时延补偿方式。
  73. 一种终端设备，其特征在于，包括处理器、存储器、通信接口，以及一个或多个程序，所述一个或多个程序被存储在所述存储器中，所述处理器执行所述一个或多个程序使得所述终端设备执行如权利要求1-18中任一项所述的用于时间同步的方法。
  74. 一种网络设备，其特征在于，包括处理器、存储器、通信接口，以及一个或多个程序，所述一个或多个程序被存储在所述存储器中，所述处理器执行所述一个或多个程序使得所述网络设备执行权利要求 19-36中任一项所述的用于时间同步的方法。
  75. 一种计算机可读存储介质，其特征在于，所述计算机可读存储介质存储有计算机程序，所述计算机程序使得终端设备执行如权利要求1-18任一项所述的用于时间同步的方法。
  76. 一种计算机可读存储介质，其特征在于，所述计算机可读存储介质存储有计算机程序，所述计算机程序使得网络设备执行如权利要求19-36任一项所述的用于时间同步的方法。
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