WO2020220851A1 - Procédé de communication, dispositif terminal et dispositif réseau - Google Patents

Procédé de communication, dispositif terminal et dispositif réseau Download PDF

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Publication number
WO2020220851A1
WO2020220851A1 PCT/CN2020/079682 CN2020079682W WO2020220851A1 WO 2020220851 A1 WO2020220851 A1 WO 2020220851A1 CN 2020079682 W CN2020079682 W CN 2020079682W WO 2020220851 A1 WO2020220851 A1 WO 2020220851A1
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WO
WIPO (PCT)
Prior art keywords
terminal device
transmission delay
network device
information
time
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PCT/CN2020/079682
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English (en)
Chinese (zh)
Inventor
许斌
李秉肇
陈磊
王学龙
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华为技术有限公司
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Publication of WO2020220851A1 publication Critical patent/WO2020220851A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W56/00—Synchronisation arrangements
    • H04W56/001—Synchronization between nodes
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W56/00—Synchronisation arrangements

Definitions

  • This application relates to the field of braking equipment for vehicles, and in particular to a communication method, terminal equipment and network equipment.
  • each terminal device has an internal time, that is, a local clock, which is managed by the clock device of the terminal device. Since the local clock of each terminal device runs independently, the local clock of each terminal device The clock of the network device is not necessarily synchronized.
  • time synchronization refers to the process of making absolute clocks between different systems synchronized through time information interaction.
  • clock synchronization between network equipment and terminal equipment or clock synchronization between terminal equipment and terminal equipment is a necessary condition for ensuring communication performance.
  • the terminal device can obtain clock reference information from the network device to synchronize time with the network device.
  • network devices can send absolute time to terminal devices through broadcast messages or unicast messages.
  • non-terrestrial network non-terrestrial network
  • NTN non-terrestrial network
  • the embodiments of the present application provide a communication method, terminal device, network device, and storage medium, so that the terminal device can synchronize with the network device correctly and efficiently, and the synchronization accuracy is improved.
  • the first aspect of this application provides a communication method, which can be applied to various communication systems, such as: long term evolution (LTE) system, LTE frequency division duplex (FDD) system, LTE time division Duplex (time division duplex, TDD), fifth generation (5G) mobile communication system, new radio (NR) communication system, and future mobile communication systems, etc. It may include: the terminal device acquires a first message, the first message carries first time information, an identifier of the first system frame, and transmission delay reference information, and the first time information is a time corresponding to a boundary of the first system frame. The terminal device can obtain the first message in different ways.
  • LTE long term evolution
  • FDD frequency division duplex
  • TDD time division duplex
  • 5G fifth generation
  • NR new radio
  • future mobile communication systems etc. It may include: the terminal device acquires a first message, the first message carries first time information, an identifier of the first system frame, and transmission delay reference information, and the first time information is a time corresponding to a boundary
  • the terminal device can receive a broadcast message sent by the network device, or the terminal device can send a request message to the network device to request the network device to send the first message.
  • the terminal device determines the second moment according to the first time information and the transmission delay reference information, and the second moment is a moment corresponding to the second system frame boundary of the terminal device.
  • the frame number of the second system frame may be the same as the frame number of the first system frame. For example, after the terminal device completes the downlink synchronization with the network device, the first system frame corresponds to the second system frame.
  • the propagation delay between the terminal device and the network device determined by the terminal device according to the transmission delay reference information is t1
  • the second time can be T1+t1
  • the second time It is the time corresponding to the second system frame boundary of the terminal device
  • the frame number of the second system frame is the same as the frame number of the first system frame.
  • the frame numbers of the second system frame and the first system frame are different.
  • the transmission delay reference information is a preset time
  • the preset time is pre-stored in the network device
  • the preset time is the estimated transmission delay between the network device and the terminal device.
  • the preset time is the duration of a system frame
  • the network device sends an absolute time information corresponding to the end boundary of the system frame 1.
  • the terminal device adjusts the absolute time corresponding to the end boundary of the system frame 2 on the terminal device side according to the absolute time corresponding to the end boundary of the system frame 1 indicated by the network device side.
  • the system frame 1 on the network device side corresponds to the system frame 1 on the terminal device side
  • the system frame 2 on the terminal device side corresponds to the frame number of the second system frame.
  • 1 is equivalent to the frame number of the first system frame
  • the frame number of the second system frame is different from the frame number of the first system frame.
  • the terminal device can determine the time corresponding to the second system frame boundary of the terminal device according to the first time information and the transmission delay reference information, so that the terminal device can obtain a more accurate absolute time, and then complete the communication with the network device Synchronization to improve the accuracy of synchronization.
  • the transmission delay reference information is location information of a network device.
  • the terminal device determining the second moment according to the first time information and the transmission delay reference information may include: the terminal device determining the second moment according to the first time information and the first transmission delay.
  • the first transmission delay is determined according to the location information of the network device and the location information of the terminal device.
  • the terminal device can determine the first transmission delay between the network device and the terminal device according to the location information of the network device and the location information of the terminal device, and the absolute time sent by the network device Combined with the first transmission delay, the terminal device can obtain a more accurate absolute time, thereby completing synchronization with the network device, and improving the accuracy of synchronization.
  • the transmission delay reference information is the second transmission delay between the network device and the first location.
  • the terminal device determining the second moment according to the first time information and the transmission delay reference information may include: the terminal device determining the second moment according to the first time information, the second transmission delay, and the third transmission delay.
  • the third transmission delay is determined according to the terminal device and the first location.
  • the first position is a preset or defined position or the first position is a reference position.
  • the transmission delay reference information is the transmission power of the network device.
  • the terminal device determining the second moment according to the first time information and the transmission delay reference information may include: the terminal device determining the second moment according to the first time information and the fourth transmission delay.
  • the fourth transmission delay is determined according to the path power loss, the transmission delay between the network device and the terminal device, and the path power loss is determined according to the transmission power of the network device.
  • the fourth transmission delay is based on one or more of path power loss, information transmission frequency, and information transmission speed.
  • the path power loss is determined based on the transmit power of the network equipment and the receive power of the terminal equipment.
  • the second aspect of the present application provides a communication method, which may include:
  • the terminal device obtains a first message, the first message carries first time information and an identifier of the first system frame, and the first time information is a time corresponding to the boundary of the first system frame.
  • the terminal device determines the second moment according to the first time information and the timing advance TA.
  • the second moment is a moment corresponding to the boundary of the second system frame of the terminal device, and the frame identifiers of the first system frame and the second system frame are the same.
  • TA corresponds to the first timer, and the duration of the first timer is T.
  • the method may further include: the terminal device determines that the first timer has not expired.
  • the duration T is configured by a network device.
  • the duration T is determined by the terminal device according to the moving state.
  • the duration T is determined by the terminal device according to the mobile state and the configuration of the network device.
  • a third aspect of the present application provides a communication method, which may include: a network device sending a first message, the first message carries first time information, the identifier of the first system frame, and transmission delay reference information, and the first time information is the first time information.
  • a network device sending a first message
  • the first message carries first time information, the identifier of the first system frame, and transmission delay reference information
  • the first time information is the first time information.
  • a moment corresponding to a system frame boundary, the first time information and transmission delay reference information are used to indicate the second moment
  • the second moment is the moment corresponding to the second system frame boundary of the terminal device, the first system frame and the second system frame
  • the frame ID is the same.
  • the transmission delay reference information is the location information of the network device, and the location information of the network device is used to indicate the first time between the network device and the terminal device. 1. Transmission delay.
  • the transmission delay reference information is the second transmission delay between the network device and the first location, and the first location is preset or defined The position or the first position is the reference position.
  • the second transmission delay indicates the second moment.
  • the transmission delay reference information is the transmission power of the network device, and the transmission power indicates the path power loss, which is related to the difference between the terminal device and the network device.
  • the fourth transmission delay between the time is related.
  • a fourth aspect of the present application provides a communication method, which may include: a network device sending a first message, the first message carrying first time information and an identifier of the first system frame.
  • the network device sends the timing advance TA, the first time information and TA are used by the terminal device to determine the second moment, the second moment is the moment corresponding to the second system frame boundary of the terminal device, the frame of the first system frame and the second system frame
  • the identity is the same.
  • the method may further include: the network device configures the first timer of the terminal device to have a duration of T, and the first timer is used for the terminal if the first timer has not expired. The device determines that TA is valid.
  • a fifth aspect of the present application provides a communication method, which may include: a terminal device obtains a first system message, the first system message carries second time information and transmission delay reference information, and the second time information is a message for sending the first system message. The time corresponding to the first time window boundary.
  • the terminal device determines a third moment according to the second time information and the transmission delay reference information. The third moment is a moment corresponding to the boundary of the second time window for receiving the first system message, and the first time window and the second time window are the same.
  • the transmission delay reference information is location information of the network device.
  • the method may further include: the terminal device determines the first transmission delay between the network device and the terminal device according to the location information of the network device and the location information of the terminal device.
  • the terminal device determining the third time according to the second time information and the transmission delay reference information may include: the terminal device determining the third time according to the second time information and the first transmission delay.
  • the transmission delay reference information is the second transmission delay between the network device and the first location.
  • the first position is a preset or defined position or the first position is a reference position.
  • the method may further include: the terminal device determining a third transmission delay between the terminal device and the first location.
  • the terminal device determining the third moment according to the second time information and the transmission delay reference information may include: the terminal device determining the third moment according to the second time information, the second transmission delay, and the third transmission delay.
  • the transmission delay reference information is the transmission power of the network device.
  • the method may further include: the terminal device determines a fourth transmission delay from the network device to the terminal device according to the path power loss, and the path power loss is determined according to the transmission power of the network device.
  • the terminal device determining the third moment according to the second time information and the transmission delay reference information may include: the terminal device determining the third moment according to the second time information and the fourth transmission delay.
  • the terminal device determines the fourth transmission delay from the network device to the terminal device according to the path power loss, and the path power loss is The determination based on the transmission power of the network device may include: the terminal device determines the fourth transmission delay from the network device to the terminal device according to the path power loss, information transmission frequency, and information transmission speed. The path power loss is based on the transmission power and The received power of the terminal device is determined.
  • the sixth aspect of the present application provides a communication method, which may include: a terminal device obtains a first system message, the first system message carries second time information, and the second time information corresponds to the first time window boundary for sending the first system message The moment.
  • the terminal device determines a third moment according to the second time information and the timing advance TA.
  • the third moment is a moment corresponding to the boundary of the second time window for receiving the first system message, and the first time window and the second time window are the same.
  • TA corresponds to the first timer
  • the duration of the first timer is T.
  • the method may further include: the terminal device determines that the first timer has not expired.
  • the duration T is configured by a network device.
  • the duration T is determined by the terminal device according to the moving state.
  • the duration T is determined by the terminal device according to the mobile state and the configuration of the network device.
  • the seventh aspect of this application provides a communication method.
  • a system information window (SI-window) is defined.
  • the SI-window can also be called a time window, that is, a network device sends System messages have periodic SI-window, and SI-window is a fixed duration.
  • different SIs can be mapped to the same SI-window, or can be mapped to different SI-windows, and the SI-windows corresponding to different SIs can overlap (specifically, overlap of some time-frequency resources), or not overlapping.
  • the terminal device needs to monitor the starting position of the SI-window until the SIB message in the SI is successfully received.
  • the network device sends a first system message
  • the first system message carries second time information and transmission delay reference information
  • the second time information is the time corresponding to the boundary of the first time window for sending the first system message
  • the system message is used by the terminal device to determine the third moment, which is the moment corresponding to the boundary of the second time window for receiving the first system message, and the first time window and the second time window are the same.
  • the transmission delay reference information is the location information of the network device, and the location information of the network device is used by the terminal device to determine the communication between the network device and the terminal device.
  • the first transmission delay is the location information of the network device.
  • the transmission delay reference information is the second transmission delay between the network device and the first location
  • the first location is preset or defined
  • the position or the first position is the reference position.
  • the second transmission delay is used by the terminal device to determine the third moment in combination with the third transmission delay and the second time information
  • the third transmission delay is the transmission delay between the terminal device and the first location.
  • the transmission delay reference information is the transmission power of the network device
  • the transmission power is used for the terminal device to determine the path power loss
  • the path power loss is used for the terminal device Determine the fourth transmission delay between the terminal device and the network device.
  • the eighth aspect of the present application provides a communication method, which may include: a network device sends a first system message, the first system message carries second time information, and the second time information corresponds to the first time window boundary for sending the first system message The moment.
  • the network device sends the timing advance TA.
  • the first system message and TA are used by the terminal device to determine the third time.
  • the third time is the time corresponding to the boundary of the second time window for receiving the first system message.
  • the first time window and the second time The windows are the same.
  • the method may further include: the network device configures the first timer of the terminal device to have a duration of T, and the first timer does not expire for the terminal The device determines that TA is valid.
  • a ninth aspect of the present application provides a terminal device, which has the function of implementing the method of any one of the foregoing first aspect, second aspect, fifth aspect, or sixth aspect.
  • This function can be realized by hardware, or by hardware executing corresponding software.
  • the hardware or software includes one or more modules corresponding to the above-mentioned functions.
  • the tenth aspect of the present application provides a network device that has the function of implementing the method of any one of the foregoing third aspect, fourth aspect, seventh aspect, or eighth aspect.
  • This function can be realized by hardware, or by hardware executing corresponding software.
  • the hardware or software includes one or more modules corresponding to the above-mentioned functions.
  • the eleventh aspect of the present application provides a computer-readable storage medium that stores instructions in the computer-readable storage medium, and when it runs on a computer, the computer can execute the first aspect, the second aspect, or the fifth aspect. Or the communication method of any possible implementation of the sixth aspect.
  • a twelfth aspect of the present application provides a computer-readable storage medium that stores instructions in the computer-readable storage medium, and when it runs on a computer, the computer can execute the third aspect, the fourth aspect, or the seventh aspect. Or the communication method of any possible implementation of the eighth aspect.
  • the thirteenth aspect of the present application provides a computer program product containing instructions, which when running on a computer, enables the computer to execute any one of the possible implementations of the first aspect or the second aspect, the fifth aspect, or the sixth aspect. Communication method.
  • the fourteenth aspect of the present application provides a computer program product containing instructions, which when running on a computer, enables the computer to execute any one of the above-mentioned third aspect, fourth aspect, seventh aspect, or eighth aspect. Communication method.
  • a fifteenth aspect of the present application provides a chip system that includes a processor for supporting a terminal device to implement any one of the possible implementation manners of the first aspect or the second aspect or the fifth aspect or the sixth aspect.
  • the chip system also includes a memory, and the memory is used to store the necessary program instructions and data of the terminal device.
  • the chip system can be composed of chips, or include chips and other discrete devices.
  • the chip system may include an application specific integrated circuit (ASIC), an off-the-shelf programmable gate array (field programmable gate array, FPGA), or other programmable logic devices. Further, the chip system may also include an interface circuit and the like.
  • a sixteenth aspect of the present application provides a chip system, which includes a processor, and is used to support a network device to implement any one of the foregoing third aspect, fourth aspect, seventh aspect, or eighth aspect.
  • the chip system also includes a memory, and the memory is used to store the necessary program instructions and data of the network device.
  • the chip system can be composed of chips, or include chips and other discrete devices.
  • a seventeenth aspect of the present application provides a terminal device, which may include: a transceiver unit, configured to obtain a first message, the first message carrying first time information, the identifier of the first system frame, and transmission delay reference information, and The time information is the time corresponding to the frame boundary of the first system.
  • the processing unit is configured to determine the second moment according to the first time information and the transmission delay reference information acquired by the acquiring unit, the second moment being the moment corresponding to the second system frame boundary of the terminal device, the first system frame and the second system frame The frame ID is the same.
  • the transmission delay reference information is location information of the network device.
  • the processing unit is specifically configured to determine the second moment according to the first time information and the first transmission delay.
  • the first transmission delay is determined according to the location information of the network device and the location information of the terminal device.
  • the transmission delay reference information is the second transmission delay between the network device and the first location.
  • the first position is a preset or defined position or the first position is a reference position.
  • the processing unit is specifically configured to determine the second moment according to the first time information, the second transmission delay, and the third transmission delay, where the third transmission delay is determined according to the terminal device and the first location.
  • the transmission delay reference information is the transmission power of the network device.
  • the processing unit is specifically configured to determine the second moment according to the first time information and the fourth transmission delay, where the fourth transmission delay is determined according to the path loss, the transmission delay between the network device and the terminal device, and the path power The loss is determined based on the transmission power of the network equipment.
  • the fourth transmission delay is based on one of path power loss, information transmission frequency, and information transmission speed or
  • the path power loss is determined based on the transmission power of the network device and the received power of the terminal device.
  • the eighteenth aspect of the present application provides a terminal device, which may include:
  • the transceiver unit is configured to obtain a first message, where the first message carries first time information and an identifier of the first system frame, and the first time information is a time corresponding to the boundary of the first system frame.
  • the processing unit is configured to determine the second moment according to the first time information and the timing advance TA obtained by the transceiver unit.
  • the second moment is the moment corresponding to the second system frame boundary of the terminal device.
  • the difference between the first system frame and the second system frame The frame identifiers are the same.
  • TA corresponds to the first timer, and the duration of the first timer is T.
  • the processing unit is further configured to determine that the first timer has not expired.
  • the duration T is configured by a network device.
  • the duration T is determined by the terminal device according to the moving state.
  • the duration T is determined by the terminal device according to the mobile state and the configuration of the network device.
  • a nineteenth aspect of the present application provides a network device, which may include: a transceiver unit, configured to send a first message, the first message carrying first time information, the identifier of the first system frame, and transmission delay reference information, and The time information is the time corresponding to the boundary of the first system frame.
  • the first time information and the transmission delay reference information are used to indicate the second time.
  • the second time is the time corresponding to the second system frame boundary of the terminal device.
  • the first system frame and The frame identifiers of the second system frames are the same.
  • the transmission delay reference information is the location information of the network device, and the location information of the network device indicates the first connection between the network device and the terminal device. Transmission delay.
  • the transmission delay reference information is the second transmission delay between the network device and the first location, and the first location is preset or The defined position or the first position is the reference position.
  • the second transmission delay indicates the second moment.
  • the transmission delay reference information is the transmission power of the network device, and the transmission power indicates the path power loss.
  • the path power loss is related to the terminal equipment and the network equipment.
  • the fourth transmission delay between is related.
  • a twentieth aspect of the present application provides a network device, which may include: a transceiver unit, configured to send a first message, where the first message carries first time information and an identifier of the first system frame.
  • the transceiver unit is also used to send the timing advance TA.
  • the first time information and TA are used by the terminal device to determine the second moment.
  • the second moment is the moment corresponding to the second system frame boundary of the terminal device.
  • the first system frame and the second The frame ID of the system frame is the same.
  • the first possible implementation manner may further include: a processing unit configured to configure the duration of the first timer of the terminal device to T, and the first timer does not expire.
  • the terminal device determines that the TA is valid.
  • the twenty-first aspect of the present application provides a terminal device, which may include: a transceiver unit, configured to obtain a first system message, the first system message carries second time information and transmission delay reference information, and the second time information is sending The time corresponding to the first time window boundary of the first system message.
  • the processing unit is configured to determine the third moment according to the second time information and the transmission delay reference information acquired by the acquiring unit. The third moment is the moment corresponding to the boundary of the second time window for receiving the first system message, the first time window and the second time window The two time windows are the same.
  • the transmission delay reference information is location information of the network device.
  • the processing unit is further configured to determine the first transmission delay between the network device and the terminal device according to the location information of the network device and the location information of the terminal device.
  • the processing unit is specifically configured to determine the third time according to the second time information and the first transmission delay.
  • the transmission delay reference information is the second transmission delay between the network device and the first location.
  • the first position is a preset or defined position or the first position is a reference position.
  • the processing unit is further configured to determine the third transmission delay between the terminal device and the first location.
  • the processing unit is specifically configured to determine the third time according to the second time information, the second transmission delay, and the third transmission delay.
  • the transmission delay reference information is the transmission power of the network device.
  • the processing unit is further configured to determine the fourth transmission delay from the network device to the terminal device according to the path power loss, and the path power loss is determined according to the transmission power of the network device.
  • the processing unit is specifically configured to determine the third time according to the second time information and the fourth transmission delay.
  • the processing unit is specifically configured to determine the network device according to path power loss, information transmission frequency, and information transmission speed
  • the fourth transmission delay to the terminal device, the path power loss is determined according to the transmission power of the network device and the receiving power of the terminal device.
  • the twenty-second aspect of the present application provides a communication method, which may include: a transceiver unit configured to obtain a first system message, the first system message carries second time information, and the second time information is the first system message sent The time corresponding to a time window boundary.
  • the processing unit is configured to determine a third moment according to the second time information and the timing advance TA acquired by the transceiver unit. The third moment is the moment corresponding to the boundary of the second time window for receiving the first system message.
  • the first time window and the second The time window is the same.
  • TA corresponds to the first timer
  • the duration of the first timer is T.
  • the processing unit is further configured to determine that the first timer has not expired.
  • the duration T is configured by a network device.
  • the duration T is determined by the terminal device according to the moving state.
  • the duration T is determined by the terminal device according to the mobile state and the configuration of the network device.
  • the twenty-third aspect of the present application provides a network device, which may include: a transceiver unit, configured to send a first system message, the first system message carries second time information and transmission delay reference information, and the second time information is sending The time corresponding to the first time window boundary of the first system message.
  • the first system message is used by the terminal device to determine the third time.
  • the third time is the time corresponding to the second time window boundary for receiving the first system message.
  • the first time window Same as the second time window.
  • the transmission delay reference information is the location information of the network device, and the location information of the network device is used by the terminal device to determine the difference between the network device and the terminal device.
  • the transmission delay reference information is the second transmission delay between the network device and the first location
  • the first location is a preset Or the defined position or the first position is the reference position.
  • the second transmission delay is used by the terminal device to determine the third moment in combination with the third transmission delay and the second time information
  • the third transmission delay is the transmission delay between the terminal device and the first location.
  • the transmission delay reference information is the transmission power of the network device
  • the transmission power is used for the terminal device to determine the path power loss
  • the path power loss is used for The terminal device determines the fourth transmission delay between the terminal device and the network device.
  • the twenty-fourth aspect of the present application provides a network device, which may include: a transceiver unit, configured to send a first system message, the first system message carries second time information, and the second time information is the first system message that sends the first system message. The time corresponding to a time window boundary.
  • the transceiver unit is also used to send the timing advance TA.
  • the first system message and TA are used by the terminal device to determine the third time.
  • the third time is the time corresponding to the second time window boundary for receiving the first system message.
  • the first time window Same as the second time window.
  • the first possible implementation manner may further include: a processing unit configured to configure the duration of the first timer of the terminal device as T, and the first timer has not expired Used by the terminal device to determine that the TA is valid.
  • the embodiments of the present application enable the terminal device to obtain a more accurate absolute time, thereby completing synchronization with the network device, and improving the accuracy of synchronization.
  • Figure 1a is a schematic diagram of a wireless communication system applicable to an embodiment of the present application
  • FIG. 1b is another schematic diagram of a wireless communication system applicable to an embodiment of the present application.
  • Figure 2 is a schematic diagram of the frame synchronization between the terminal equipment and the network equipment system after the downlink synchronization of the 5G communication system;
  • Figure 3 is a schematic diagram of the deviation between the absolute time sent by the network device and the absolute time determined by the terminal device;
  • FIG. 4 is a schematic diagram of an embodiment of a communication method in an embodiment of this application.
  • FIG. 5 is a schematic diagram of another embodiment of a communication method in an embodiment of this application.
  • Fig. 6 is a schematic diagram of another embodiment of the communication method in the application embodiment.
  • Fig. 7 is another schematic diagram of a wireless communication system applicable to an embodiment of the present application.
  • FIG. 8 is another schematic diagram of a wireless communication system applicable to an embodiment of the present application.
  • FIG. 9 is a schematic diagram of another embodiment of a communication method in an embodiment of this application.
  • FIG. 10 is a schematic diagram of another embodiment of a communication method in an embodiment of this application.
  • FIG. 11 is a schematic diagram of another embodiment of a communication method in an embodiment of this application.
  • FIG. 12 is a schematic diagram of another embodiment of a communication method in an embodiment of this application.
  • FIG. 13 is a schematic diagram of the hardware structure of a communication device provided by an embodiment of the application.
  • FIG. 14 is a schematic structural diagram of a terminal device provided by an embodiment of this application.
  • 15 is a schematic diagram of the hardware structure of another communication device provided by an embodiment of the application.
  • FIG. 16 is a schematic structural diagram of a network device provided by an embodiment of this application.
  • the embodiments of the present application provide a communication method, terminal equipment, network equipment, and storage medium.
  • the terminal equipment determines the time corresponding to the frame boundary of the second system according to the acquired time corresponding to the frame boundary of the first system and the transmission delay reference information.
  • the frame identifiers of the first system frame and the second system frame are the same, which ensures that the terminal device can obtain more accurate absolute time and synchronize time with the network device. Detailed descriptions are given below.
  • the naming or numbering of steps appearing in this application does not mean that the steps in the method flow must be executed in the time/logical order indicated by the naming or numbering.
  • the named or numbered process steps can be implemented according to the The technical purpose changes the execution order, as long as the same or similar technical effects can be achieved.
  • the division of modules presented in this application is a logical division. In actual applications, there may be other divisions. For example, multiple modules can be combined or integrated in another system, or some features can be ignored , Or not executed.
  • the displayed or discussed mutual coupling or direct coupling or communication connection may be through some ports, and the indirect coupling or communication connection between modules may be in electrical or other similar forms. There are no restrictions in the application.
  • the modules or sub-modules described as separate components may or may not be physically separate, may or may not be physical modules, or may be distributed to multiple circuit modules, and some or all of them may be selected according to actual needs Module to achieve the purpose of this application program.
  • pre-defined or “preset” means that the corresponding code, table or other information that can be used to indicate related information can be pre-stored in the device (for example, including terminal equipment and network equipment) This application does not limit the specific implementation method.
  • pre-defined may refer to the definition in the agreement.
  • LTE long term evolution
  • FDD frequency division duplex
  • TDD time division duplex
  • 5G fifth generation
  • NR new radio
  • FIG. 1a and FIG. 1b are schematic diagrams of a wireless communication system suitable for embodiments of the present application.
  • the wireless communication system may include a single or multiple network devices, or as shown in FIG. 1b, the communication system may include a single or multiple terminal devices.
  • a single network device can transmit data or control signaling to a single or multiple terminal devices. Multiple network devices can also simultaneously transmit data or control signaling for a single terminal device.
  • the wireless communication system can support coordinated multiple points transmission (CoMP), that is, multiple cells or multiple network devices can cooperate to participate in the data transmission of a terminal device or jointly receive data sent by a terminal device, or multiple A cell or multiple network devices perform coordinated scheduling or coordinated beamforming.
  • CoMP coordinated multiple points transmission
  • the multiple cells may belong to the same network device or different network devices, and may be selected according to channel gain or path loss, received signal strength, received signal instruction, and the like.
  • the network device in the wireless communication system can be any device with wireless transceiver function or a chip that can be installed in the device.
  • the device includes but is not limited to: base station, evolved node B (eNB) , Femtocells, access points (AP), wireless relay nodes, wireless backhaul nodes, transmission points (TP), or transmission and reception points in the wireless fidelity (WIFI) system and reception point, TRP), etc., it can also be the gNB in the NR system, or it can be a component or part of the equipment that constitutes a base station, such as a centralized unit (CU), a distributed unit (DU) or a baseband Unit (baseband unit, BBU), etc.
  • CU centralized unit
  • DU distributed unit
  • BBU baseband unit
  • wireless access network equipment is referred to as network equipment.
  • network equipment in this application refers to wireless access network equipment.
  • the network device can refer to the network device itself, or it can be a chip used in the network device to complete the wireless communication processing function.
  • gNB may include CU and DU.
  • the gNB may also include a radio unit (RU).
  • CU implements some functions of gNB
  • DU implements some functions of gNB, for example, CU implements radio resource control (radio resource control, RRC), packet data convergence protocol (packet data convergence protocol, PDCP) layer functions
  • DU implements wireless link
  • RRC radio resource control
  • PDCP packet data convergence protocol
  • DU implements wireless link
  • RLC radio link control
  • MAC media access control
  • PHY physical
  • the network device may be a CU node, or a DU node, or a device including a CU node and a DU node.
  • the CU can be divided into network equipment in the access network RAN, and the CU can also be divided into network equipment in the core network CN, which is not limited here.
  • the terminal equipment in the wireless communication system may also be referred to as a terminal, user equipment (UE), mobile station (MS), mobile terminal (MT), and so on.
  • the terminal equipment in the embodiments of this application can be a mobile phone, a tablet computer (Pad), a computer with wireless transceiver function, and can also be applied to virtual reality (VR) and augmented reality (AR). ), industrial control, self-driving, remote medical, smart grid, transportation safety, smart city, and smart home ) And other wireless terminals.
  • the aforementioned terminal devices and chips applicable to the aforementioned terminal devices are collectively referred to as terminal devices. It should be understood that the embodiments of the present application do not limit the specific technology and specific device form adopted by the terminal device.
  • FIG. 1a or FIG. 1b is only for ease of understanding and schematically shows network equipment and terminal equipment, but this should not constitute any limitation to this application.
  • the wireless communication system may also include more or less numbers of networks.
  • Devices can also include a larger number of terminal devices.
  • the network devices communicating with different terminal devices can be the same network device or different network devices.
  • the number of network devices communicating with different terminal devices can be the same. It can also be different, and this application includes but is not limited to this.
  • the terminal device For the communication system shown in FIG. 1a or FIG. 1b, the terminal device often needs to obtain absolute time information from the network device to synchronize clocks with the network device or to assist the global positioning system (GPS) to work.
  • the absolute time may include universal time coordinated (UTC), international atomic time (TAI), or GPS time.
  • UTC universal time coordinated
  • TAI international atomic time
  • a network device can carry absolute time information through a broadcast message system information block (system information block, SIB) 9 and send the absolute time information to a terminal device, or the network device can use unicast message radio resources Control (radio resource control, RRC) signaling carries absolute time information, and sends the absolute time information to the terminal device.
  • RRC radio resource control
  • the indication method may be to explicitly carry the frame identifier in the signaling or not to explicitly carry it, and a frame boundary or time window boundary is agreed upon according to the protocol.
  • the terminal device After receiving the absolute time information sent by the network device, the terminal device adjusts its own clock according to the absolute time information and the frame boundary corresponding to the absolute time information, so that the absolute time of the terminal device and the network device at the same frame boundary is the same.
  • the purpose of clock synchronization is the same.
  • Non-terrestrial network Non-terrestrial network
  • NTN non-terrestrial network
  • the distance between the network device and the terminal device is very long, so a large transmission delay will be introduced when the network device communicates with the terminal device.
  • the transmission delay can be as high as several hundred milliseconds.
  • the terminal device After the terminal device receives the absolute time information sent by the network device, if it still only determines the absolute time corresponding to the terminal device at the specified frame boundary according to the received absolute time information, it will cause the terminal device to synchronize with the actual desired There is a large deviation between the effects. In order to clearly illustrate this problem, a detailed description will be given below in conjunction with FIG. 2 and FIG. 3.
  • FIG. 2 it is a schematic diagram of the frame synchronization between the terminal equipment and the network equipment system after the downlink synchronization of the 5G communication system.
  • a terminal device When a terminal device accesses a 5G network, it generally first goes through processes such as cell search, cell system information acquisition, and random access.
  • the network device sends the primary synchronization signal (PSS) and the secondary synchronization signal (SSS), and the terminal device detects the PSS or SSS signal to determine the location of subframe 0 in the system frame. Then, by receiving the cell system information, the system frame number is determined.
  • the system frame number can also be called the system frame identifier, so that the terminal device completes the downlink synchronization with the network device, and determines and corresponds to the specific system frame and subframe of the network device Position and frame number.
  • FIG. 2 it is a schematic diagram of system frame and subframe synchronization between terminal equipment and network equipment after downlink synchronization of the 5G system.
  • the essence of downlink synchronization is that after the terminal device receives the PSS or SSS signal and cell system information, it synchronizes itself with the frame of the network device, which means that the system frame where the network device sends information is the same as the system frame where the terminal device receives the information. Absolute time synchronization. After the terminal equipment completes the downlink synchronization, the terminal equipment and the network equipment will maintain a set of time represented by the system frame.
  • the network device system frame in the present invention refers to the system frame maintained by the network side
  • the terminal device system frame refers to the system frame maintained by the terminal side.
  • the system frames maintained by the network equipment and the terminal equipment may be the same set of system frames or different system frames.
  • FIG. 3 it is a schematic diagram of the deviation between the absolute time sent by the network device and the absolute time determined by the terminal device.
  • the network device sends time information of an absolute time corresponding to the end boundary of the system frame 1.
  • the absolute time may be UTC time, TAI time, or GPS time.
  • the embodiment of this application does not perform absolute time. Specific restrictions. Assuming that the transmission delay from the network device to the terminal device is the length of 1 system frame, since the system frame alignment is done during the downlink synchronization process, the absolute time information corresponding to the end boundary of the system frame 1 of the network device and the terminal device system The absolute time information corresponding to the end boundary of frame 1 is inconsistent. It can be clearly seen from FIG. 3 that if the terminal device adjusts the absolute time corresponding to the end boundary of the system frame 1 on the terminal device side according to the absolute time corresponding to the end boundary of the system frame 1 indicated by the network device side, a large deviation will occur.
  • the embodiments of the present application provide a communication method to enable the terminal device to obtain correct absolute time information in the NTN communication system or in a scenario where the transmission delay between other terminal devices and network devices is not negligible. Complete synchronization with network equipment.
  • the following will specifically introduce the communication method provided in the embodiment of the present application.
  • Fig. 4 is a schematic diagram of an embodiment of a communication method in an embodiment of the application.
  • an embodiment of the communication method in the embodiment of the present application may include:
  • the terminal device acquires the first message.
  • the first message carries one or more of the first time information, the identifier of the first system frame, and the transmission delay reference information, and the first time information is the time corresponding to the boundary of the first system frame.
  • the terminal device can obtain the first message in different ways. For example, the terminal device can receive a broadcast message sent by the network device, or the terminal device can send a request message to the network device to request the network device to send the first message.
  • the system frame boundary may be the start boundary or the end boundary of the system frame, or the start boundary or the end boundary of other granular time units.
  • the first message may be one message or multiple messages. That is, the first time information, the identifier of the first system frame, and the transmission delay reference information may be carried in the same message, or may also be carried in different messages, which will not be repeated hereafter.
  • the terminal device After obtaining downlink synchronization with the cell through the cell search process, the terminal device also needs to obtain a series of system information (SI), such as the network information of the cell in which the terminal device is located, the information of the registered area, and the public Channel information and other cell information, etc., can work correctly in the cell.
  • SI system information
  • the SI is generally organized in the form of a system information block (SIB), where each SIB may include a series of parameter sets related to a certain function.
  • system messages can be divided into two types: the first type is the SIB that all terminal devices in the cell need to obtain, and the second type is the SIB that some terminal devices in the cell need to obtain. , And another part of the terminal equipment does not need to obtain the SIB.
  • the network-side equipment can periodically broadcast and/or multicast the first type of SIB, so that the terminal equipment in the cell does not need to send the corresponding acquisition for this type of SIB. Request; and, the network side device may unicast the second type SIB according to the acquisition request of the terminal device, thereby avoiding the waste of wireless resources caused by broadcasting and/or multicast sending the second type SIB.
  • SIB9 contains GPS or UTC-related time information or other types of time information to help terminal devices obtain absolute time information of network devices.
  • the network device may periodically broadcast and/or multicast SIB9 to the terminal device, or the network device may actively use unicast message radio resource control based on the request of the terminal device or not based on the request.
  • RRC radio resource control
  • the SIB9 message or unicast RRC signaling may include the first system frame, the second system frame, or the third system frame.
  • the first, second, and third system frames do not represent a limitation on the number of system frames, but only to distinguish different System frame.
  • the SIB9 message or unicast RRC signaling may carry an identifier of a system frame, for example, may carry the identifier of the first system frame, and indicate the absolute time corresponding to the boundary of the first system frame.
  • the relative time is not limited to the system frame boundary in the present invention, and the system frame boundary can also be replaced with a sub-frame boundary or a relative time unit boundary with a smaller time granularity, which will not be repeated here.
  • the first message also carries transmission delay reference information.
  • the transmission delay reference information may specifically be the location information of the network device or the transmission power of the network device or the preset transmission delay, or other terminal devices may use information to determine the transmission delay between the terminal device and the network device.
  • the transmission delay reference information is used to indicate the second moment or used by the terminal device to determine the second moment.
  • the terminal device determines the second time according to the first time information and the transmission delay reference information.
  • the terminal device After the terminal device completes the downlink synchronization with the network device, it determines and corresponds to the specific system frame and system frame number of the network device.
  • the specific frame alignment process of the downlink synchronization system can be understood with reference to the description of FIG. 2, and the details are not repeated here.
  • the frame number of the second system frame may be the same as the frame number of the first system frame.
  • the first system frame corresponds to the second system frame.
  • the propagation delay between the terminal device and the network device determined by the terminal device according to the transmission delay reference information is t1
  • the second time can be T1+t1
  • the second time It is the time corresponding to the second system frame boundary of the terminal device, and the frame number of the second system frame is the same as the frame number of the first system frame.
  • the frame numbers of the second system frame and the first system frame are different.
  • the transmission delay reference information is a preset time
  • the preset time is pre-stored in the network device
  • the preset time is the estimated transmission delay between the network device and the terminal device.
  • the preset time is the duration of a system frame
  • the network device sends an absolute time information corresponding to the end boundary of the system frame 1.
  • the terminal device adjusts the absolute time corresponding to the end boundary of the system frame 2 on the terminal device side according to the absolute time corresponding to the end boundary of the system frame 1 indicated by the network device side.
  • the system frame 1 on the network device side corresponds to the system frame 1 on the terminal device side
  • the system frame 2 on the terminal device side corresponds to the frame number of the second system frame.
  • 1 is equivalent to the frame number of the first system frame
  • the frame number of the second system frame is different from the frame number of the first system frame.
  • the terminal device can determine the time corresponding to the second system frame boundary of the terminal device according to the first time information and the transmission delay reference information, so that the terminal device can obtain a more accurate absolute time, and then complete Synchronize with network equipment to improve the accuracy of synchronization.
  • the terminal device may also obtain a more accurate absolute time according to other methods.
  • the transmission delay reference information may be different information. The following will describe other methods for obtaining more accurate absolute time and transmission delay reference information in detail. instruction of.
  • FIG. 5 is a schematic diagram of another embodiment of the communication method in the embodiment of this application.
  • another embodiment of the communication method in the embodiment of the present application may include:
  • the terminal device obtains a first system message.
  • the first system message carries second time information and transmission delay reference information.
  • the terminal device can obtain the first system message in different ways. For example, the terminal device can receive a broadcast message sent by the network device, or the terminal device can send a request message to the network device to request the network device to send the first system message.
  • the second time information is a time corresponding to the boundary of the first time window for sending the first system message.
  • SI-window can also be called a time window, that is, the network device sends system messages with periodic SI-window
  • SI -window is a fixed duration.
  • different SIs can be mapped to the same SI-window, or can be mapped to different SI-windows, and the SI-windows corresponding to different SIs can overlap (specifically, overlap of some time-frequency resources), or not overlapping.
  • the terminal device needs to monitor the starting position of the SI-window until the SIB message in the SI is successfully received.
  • SIB9 contains GPS or UTC-related time information or other types of time information to help terminal devices obtain absolute time information of network devices.
  • the network device may periodically broadcast and/or multicast the SIB9 to the terminal device, or the network device may send the SIB9 to the terminal device based on the request of the terminal device.
  • the SI-window corresponding to the SIB9 message is the fifth system frame to the tenth system frame, where the boundary of the fifth system frame can be regarded as the starting boundary of the SI-window, and the boundary of the tenth system frame can be regarded as It is the end boundary of the SI-window.
  • the terminal device needs to monitor the start position of the SI-window until the end of the SI-window, so the terminal device can obtain the time corresponding to the start boundary of the SI-window or the time corresponding to the end boundary of the SI-window.
  • the boundary of the SI-window is exactly aligned with a certain system frame boundary; assuming that the boundary of the SI-window is not aligned with any system frame boundary, it corresponds to the following embodiment.
  • the second time information is a moment corresponding to the third system frame boundary, where the third system frame boundary is the closest system frame boundary after the first time window boundary at which the first system message is sent.
  • the second time information is the time corresponding to the nearest system frame boundary (ie, the second system frame end boundary) after the end boundary of the SI-window.
  • the second time information can also be the time corresponding to the nearest system frame boundary (ie the end boundary of the first system frame) after the start boundary of the SI-window; or the nearest system frame boundary before the start boundary of the SI-window (ie the first The time corresponding to the start boundary of the first system frame.
  • the terminal device needs to monitor the start position of the SI-window until the end of the SI-window, so the terminal device can obtain the position of the start boundary or the end boundary of the SI-window in the time domain.
  • the first system message also carries transmission delay reference information.
  • the transmission delay reference information may specifically be the location information of the network device or the transmission power of the network device, or information that other terminal devices may use to determine the transmission delay between the terminal device and the network device.
  • the transmission delay reference information is used to indicate the third time or used by the terminal device to determine the third time.
  • the terminal device determines the third time according to the second time information and the transmission delay reference information.
  • the third time is the time corresponding to the boundary of the second time window for receiving the first system message.
  • the propagation delay between the terminal device and the network device determined by the terminal device according to the transmission delay reference information is t2
  • the time corresponding to the end boundary of the SI-window that sends the first system message is assumed to be T2
  • the third time may be T2+t2
  • the third time is the time corresponding to the end boundary of the SI-window receiving the first system message.
  • the time corresponding to the initial boundary of the SI-window sending the first system message is T3
  • the third time can be T3+t2 and the third time is corresponding to the initial boundary of the SI-window receiving the first system message time.
  • the propagation delay between the terminal device and the network device determined by the terminal device according to the transmission delay reference information is t2, and it is assumed that the nearest system frame boundary after the SI-window boundary of the first system message is sent
  • the corresponding time is T2
  • the third time may be T2+t2
  • the third time is the time corresponding to the nearest system frame boundary after the SI-window boundary that received the first system message.
  • the SI-window boundary can be the start boundary or the end boundary.
  • the terminal device can determine the time corresponding to the boundary of the SI-window according to the second time information and the transmission delay reference information, so that the terminal device can obtain a more accurate absolute time, and then complete the connection with the network
  • the synchronization of the equipment improves the accuracy of synchronization.
  • the transmission delay reference information can be different information.
  • the following will refer to the transmission delay reference information as the location information of the network device, and the transmission delay reference information as the network device and the first
  • the second transmission delay between locations, and the transmission delay reference information is the transmission power of the network device, which is described in detail.
  • FIG. 6 is a schematic diagram of another embodiment of the communication method in the embodiment of the application.
  • another embodiment of the communication method in the embodiment of the present application may include:
  • a terminal device obtains location information and time information of a network device.
  • the terminal device obtains the location information and time information of the network device by obtaining a first message, which carries the location information of the network device, the first time information, and the identifier of the first system frame.
  • the first message can be understood by referring to the first message described in the embodiment corresponding to FIG. 4, and the details are not repeated here.
  • the terminal device obtains the location information and time information of the network device by obtaining a first system message, and the first message carries the location information and second time information of the network device.
  • the first system message can be understood with reference to the first system message described in the embodiment corresponding to FIG. 5, and the details are not repeated here.
  • the terminal device determines the first transmission delay between the network device and the terminal device according to the location information of the network device and the location information of the terminal device.
  • the terminal equipment can learn its own location information. According to the location information of the network device and the terminal device, the terminal device can learn the distance d between the network device and the terminal device.
  • the network equipment includes a satellite and a base station, as shown in FIG. 7, where the base station may be located on the satellite.
  • the satellite can be a satellite in the BeiDou navigation satellite system (BDS), a satellite in a GPS, or a satellite in the global navigation satellite system (GLONASS).
  • BDS BeiDou navigation satellite system
  • GLONASS global navigation satellite system
  • the application examples are not limited.
  • the first transmission delay t3 (satellite GPS position-terminal equipment GPS position)/speed of light, where (satellite GPS position-terminal equipment GPS position) represents the satellite/base station to the terminal equipment in space The distance value above.
  • the network equipment includes a satellite and a base station, as shown in FIG. 8, where the communication signal is transmitted by the base station and then forwarded to the terminal equipment via the satellite.
  • the first transmission delay t3 (satellite GPS position-terminal equipment GPS position) / speed of light + (satellite GPS position-base station GPS position) / speed of light, where (satellite GPS position-terminal equipment GPS position) means that the satellite to the terminal equipment is in space
  • the distance value on the (satellite GPS position-base station GPS position) represents the distance value from the satellite to the base station in space.
  • the terminal device determines the second time according to the first time information and the first transmission delay.
  • the terminal device After the terminal device completes the downlink synchronization with the network device, it determines and corresponds to the specific system frame and system frame number of the network device.
  • the specific frame alignment process of the downlink synchronization system can be understood with reference to the description of FIG. 2, and details are not repeated here.
  • the first system frame corresponds to the second system frame. In other words, the first system frame and the second system frame are aligned, and the first system frame and the second system frame are aligned.
  • the frame numbers of the second system frames are the same.
  • the terminal device determines the first transmission delay t3 between the network device and the terminal device according to the location information of the network device and the location information of the terminal device. Assuming that the time corresponding to the first system frame boundary is T1, the second time can be T1+ t3, the second time is the time corresponding to the second system frame boundary of the terminal device.
  • the terminal device determines the third time according to the second time information and the first transmission delay. Assuming that the time corresponding to the end boundary of the SI-window sending the first system message is T2, the third time can be T2 + the first transmission delay, and the third time is corresponding to the end boundary of the SI-window receiving the first system message time. Or assume that the time corresponding to the start boundary of the SI-window sending the first system message is T3, then the third time can be T2 + the first transmission delay, and the third time is the start of the SI-window receiving the first system message The moment corresponding to the boundary.
  • step 602 and step 603 can be performed in combination, that is, the terminal device determines the second time according to the location information of the network device, the location information of the terminal device, and the first time information.
  • the second time the time T1 corresponding to the frame boundary of the first system + (satellite GPS position-terminal device GPS position) / speed of light + (satellite GPS position-base station GPS position) / speed of light, Among them, (satellite GPS position-terminal equipment GPS position) represents the distance value from the satellite to the terminal equipment in space, (satellite GPS position-base station GPS position) represents the distance value from the satellite to the base station in space.
  • step 602 and step 604 can be performed in combination, that is, the terminal device determines the third time according to the location information of the network device, the location information of the terminal device, and the second time information.
  • the terminal device determines the third time according to the location information of the network device, the location information of the terminal device, and the second time information. For example, take the communication system described in FIG.
  • 603 and 604 in the embodiment corresponding to FIG. 6 can be executed alternatively in the actual application process.
  • the embodiment corresponding to FIG. 6 can be combined with any one of the embodiments corresponding to FIG. 4 and FIG. 5 or executed independently.
  • the location information of the network device in the embodiment corresponding to FIG. 6 may refer to the transmission delay reference information in the embodiment corresponding to FIG. 4 or FIG. 5
  • the time information of the network device in the embodiment corresponding to FIG. 6 may refer to FIG. 4 corresponds to the first time information in the embodiment or the second time information in the embodiment corresponding to FIG. 5.
  • the terminal device can determine the first transmission delay between the network device and the terminal device according to the location information of the network device and the location information of the terminal device, and the absolute time sent by the network device is combined with the first transmission
  • the time delay allows the terminal device to obtain a more accurate absolute time, thereby completing synchronization with the network device, and improving the accuracy of synchronization.
  • FIG. 9 is a schematic diagram of another embodiment of the communication method in the embodiment of the application.
  • another embodiment of the communication method in the embodiment of the present application may include:
  • the terminal device obtains a second transmission delay between the network device and the first location and time information of the network device.
  • the first position is a preset or defined position or the first position is a reference position.
  • the first location may be a fixed location on the ground, a fixed lighthouse location, a cell center, or a landmark location, and so on.
  • the terminal device obtains the second transmission delay by obtaining a first message, and the first message carries the second transmission delay, the first time information, and the identifier of the first system frame.
  • the first message can be understood by referring to the first message described in the embodiment corresponding to FIG. 4, and the details are not repeated here.
  • the terminal device acquires the second transmission delay by acquiring the first system message, and the first system message carries the second transmission delay and the second time information.
  • the first system message can be understood with reference to the first system message described in the embodiment corresponding to FIG. 5, and the details are not repeated here.
  • the network equipment includes a satellite and a base station, as shown in FIG. 7, where the base station is integrated on the satellite.
  • the second transmission time delay t4 (satellite GPS position-first position)/speed of light, where (satellite GPS position-first position) means that the satellite/base station is in space from the first position The distance value.
  • the network equipment includes a satellite and a base station, as shown in FIG. 8, where the communication signal is transmitted by the base station and then forwarded to the terminal equipment via the satellite.
  • the second transmission delay t4 (satellite GPS position-first position) / speed of light + (satellite GPS position-base station GPS position) / speed of light, where (satellite GPS position-first position) represents the satellite to the first position in space
  • the distance value of (satellite GPS position-base station GPS position) represents the distance value from the satellite to the base station in space.
  • the terminal device determines a third transmission delay between the terminal device and the first location.
  • the terminal device determines the second time according to the first time information, the second transmission delay, and the third transmission delay.
  • the terminal device After the terminal device completes the downlink synchronization with the network device, it determines and corresponds to the specific system frame and system frame number of the network device.
  • the specific frame alignment process of the downlink synchronization system can be understood with reference to the description of FIG. 2, and details are not repeated here.
  • the first system frame corresponds to the second system frame. In other words, the first system frame and the second system frame are aligned, and the first system frame and the second system frame are aligned.
  • the frame numbers of the second system frames are the same.
  • the second time may be T1+the second propagation delay t4+the third propagation delay t5, and the second time is the time corresponding to the second system frame boundary of the terminal device.
  • the terminal device determines the third time according to the first time information, the second transmission delay, and the third transmission delay. Assuming that the time corresponding to the end boundary of the SI-window sending the first system message is T2, the third time can be T2 + the second transmission delay + the third transmission delay, and the third time is the SI- for receiving the first system message. The time corresponding to the end boundary of the window. Or suppose that the time corresponding to the start boundary of the SI-window that sends the first system message is T3, then the third time can be T2 + the second transmission delay + the third transmission delay, and the third time is the time when the first system message is received The time corresponding to the start boundary of the SI-window.
  • step 902 and step 903 can be performed in combination, that is, the terminal device determines the second time according to the third transmission delay, the second transmission delay, and the first time information.
  • the second time the time T1 corresponding to the frame boundary of the first system + (satellite GPS position-first position) / speed of light + (satellite GPS position-base station GPS position) / speed of light + ( The first position-the GPS position of the terminal device)/speed of light, where (satellite GPS position-first position) represents the distance value from the satellite to the first position in space, (satellite GPS position-base station GPS position) represents the satellite to the base station in space The distance value above, (first position-terminal device GPS position) represents the spatial distance value of the terminal device to the first position.
  • step 902 and step 904 can be performed in combination, that is, the terminal device determines the third time according to the location information of the network device, the location information of the terminal device, and the second time information.
  • the embodiment corresponding to FIG. 9 can be executed alternatively in the actual application process.
  • the embodiment corresponding to FIG. 9 may be combined with any one of the embodiments corresponding to FIG. 4 and FIG. 5 or executed independently.
  • the second transmission delay in the embodiment corresponding to FIG. 9 may refer to the transmission delay reference information in the embodiment corresponding to FIG. 4 or FIG. 5
  • the time information of the network device in the embodiment corresponding to FIG. 9 may refer to FIG. 4 corresponds to the first time information in the embodiment or the second time information in the embodiment corresponding to FIG. 5.
  • the absolute time sent by the network device is combined with the second transmission delay and the third transmission delay, so that the terminal device can obtain a more accurate absolute time, thereby completing synchronization with the network device and improving The accuracy of synchronization.
  • FIG. 10 is a schematic diagram of another embodiment of a communication method in an embodiment of this application.
  • another embodiment of the communication method in the embodiment of the present application may include:
  • a terminal device receives transmission power of a network device and time information of the network device.
  • the terminal device obtains the transmission power and time information of the network device through a first message, and the first message carries the transmission power of the network device, the first time information, and the identifier of the first system frame.
  • the first message can be understood by referring to the first message described in the embodiment corresponding to FIG. 4, and the details are not repeated here.
  • the terminal device obtains the transmission power and time information of the network device by obtaining a first system message, and the first system message carries the transmission power and second time information of the network device.
  • the first system message can be understood with reference to the first system message described in the embodiment corresponding to FIG. 5, and the details are not repeated here.
  • the terminal device determines the path power loss according to the transmission power of the network device.
  • Path power loss can also be referred to as path loss or path loss for short.
  • the terminal device determines the fourth transmission delay from the network device to the terminal device according to the path power loss.
  • the terminal device can determine the fourth transmission delay from the network device to the terminal device according to the path loss and some other parameters. For example, in a specific embodiment, the terminal device determines the fourth transmission delay according to the path power loss combined with the information transmission frequency. Or, in a specific embodiment, the terminal device determines the fourth transmission delay according to the path power loss combined with the information transmission speed, or in a specific embodiment, the terminal device determines the fourth transmission delay according to the path power loss combined with the information transmission frequency and the information transmission speed. Determine the fourth transmission delay. For example, assuming that the wireless transmission distance, the frequency used for wireless transmission, and the path loss satisfy a certain equation or formula, the path loss can be determined according to known parameters.
  • path loss 20lgd+20lgf+X
  • X is a constant
  • the path loss can be based on the known parameters of the wireless transmission distance d, the frequency f used for wireless transmission, and a known constant X is OK. It is worth noting that the above equation is only an example, and the present invention does not limit the path loss to be determined according to the above equation.
  • the terminal device determines the second time according to the first time information and the fourth transmission delay.
  • the terminal device After the terminal device completes the downlink synchronization with the network device, it determines and corresponds to the specific system frame and system frame number of the network device.
  • the specific frame alignment process of the downlink synchronization system can be understood with reference to the description of FIG. 2, and details are not repeated here.
  • the first system frame corresponds to the second system frame. In other words, the first system frame and the second system frame are aligned, and the first system frame and the second system frame are aligned.
  • the frame numbers of the second system frames are the same.
  • the second time may be T1+the fourth transmission delay, and the second time is the time corresponding to the second system frame boundary of the terminal device.
  • the terminal device determines the third time according to the second time information and the fourth transmission delay. Assuming that the time corresponding to the end boundary of the SI-window sending the first system message is T2, the third time can be T2 + the fourth transmission delay, and the third time is corresponding to the end boundary of the SI-window receiving the first system message time. Or assuming that the time corresponding to the start boundary of the SI-window sending the first system message is T3, the third time can be T2 + the fourth transmission delay, and the third time is the start of the SI-window receiving the first system message The moment corresponding to the boundary.
  • step 1002 to step 1004 can be executed in combination, that is, the terminal device determines the second time according to the transmit power, received power, and other parameters as well as the first time information.
  • Other parameters can include transmission frequency or transmission speed.
  • step 1002 to step 1003 and step 1005 can be executed in combination, that is, the terminal device determines the third time according to the transmit power, the received power, and some other parameters and the second time information.
  • Other parameters may include transmission Frequency or transmission speed.
  • 1004 and 1005 in the embodiment corresponding to FIG. 10 can be executed alternatively in the actual application process.
  • the embodiment corresponding to FIG. 10 can be combined with any one of the embodiments corresponding to FIG. 4 and FIG. 5 or executed independently.
  • the transmit power of the network device in the embodiment corresponding to FIG. 10 may refer to the transmission delay reference information in the embodiment corresponding to FIG. 4 or FIG. 5
  • the time information of the network device in the embodiment corresponding to FIG. 10 may refer to FIG. 4 corresponds to the first time information in the embodiment or the second time information in the embodiment corresponding to FIG. 5.
  • the terminal device can determine the fourth transmission delay between the network device and the terminal device according to the path loss power, and the absolute time sent by the network device is combined with the fourth transmission delay, so that the terminal device can obtain More accurate absolute time, and then complete synchronization with network equipment, improve the accuracy of synchronization.
  • FIG. 11 is a schematic diagram of another embodiment of a communication method in an embodiment of this application.
  • another embodiment of the communication method in the embodiment of the present application may include:
  • the terminal device obtains the first message.
  • the first message carries first time information and an identifier of the first system frame, and the first time information is a time corresponding to the boundary of the first system frame.
  • the terminal device can obtain the first message in different ways. For example, the terminal device can receive a broadcast message sent by the network device, or the terminal device can send a request message to the network device to request the network device to send the first message.
  • SIB9 contains GPS or UTC-related time information or other types of time information to help terminal devices obtain absolute time information of network devices.
  • the network device may periodically broadcast and/or multicast SIB9 to the terminal device, or the network device may actively use unicast message radio resource control based on the request of the terminal device or not based on the request.
  • RRC radio resource control
  • the SIB9 message or unicast RRC signaling may include the first system frame, the second system frame, or the third system frame.
  • the first, second, and third system frames do not represent a limitation on the number of system frames, but only to distinguish different System frame.
  • the SIB9 message or unicast RRC signaling may carry an identifier of a system frame, for example, may carry the identifier of the first system frame, and indicate the absolute time corresponding to the boundary of the first system frame.
  • the terminal device determines a second time according to the first time information and a timing advance (time advance, TA).
  • TA timing advance
  • the network device sends a TA to the terminal device, and the terminal device adjusts the time for sending the uplink signal according to the received TA, thereby achieving uplink timing synchronization between the terminal device and the network device.
  • the time advance is twice the amount of transmission time, and twice the amount of transmission time is also called round trip time (RTT).
  • the network device estimates the TA according to the random access preamble, and sends msg2 to the terminal device, and the msg2 carries the TA.
  • the terminal device may also obtain the TA in other ways.
  • the embodiment of the present application does not limit the manner in which the terminal device obtains the TA.
  • the network device may determine the TA value of each terminal device based on measuring the uplink transmission of the corresponding terminal device. Therefore, as long as the terminal device has uplink transmission, the network device can be used to estimate the TA value and send it to the terminal device through a downlink message.
  • the second time may be T1+TA/2, and the second time is the time corresponding to the second system frame boundary of the terminal device.
  • the frame identifiers of the first system frame and the second system frame are the same.
  • the terminal device determines that the first timer has not expired.
  • the TA is the TA that was maintained in the connected state the last time the terminal device was transferred to the idle state, and the first timer is started when the terminal device is transferred from the connected state to the idle state, and the first timer runs In the process, the terminal device considers that the TA is valid and can be used. When the first timer expires, the terminal device considers that the TA is invalid and cannot be used.
  • the first timer duration T is configured by the network device; or the first timer duration T is determined by the terminal device according to the mobile state, where the mobile state may include the mobile speed of the terminal device, for example, if the terminal device determines that the terminal device is currently moving If the speed is v1, the terminal device can configure the duration T of the first timer as T2. If the terminal device determines that the current moving speed is v2, where v2 is greater than v1, the terminal device can configure the duration T of the first timer as T3. , Where T3 is less than T2; or the duration T is determined by the terminal device according to the mobile status and the configuration of the network device.
  • the terminal device can be based on T3 and based on its own mobile Status, for example, configure the duration of the first timer as T4 according to its own moving speed, where T4 may be greater than T3 or T4 may be less than T3.
  • the terminal device can combine the absolute time sent by the network device with the TA, so that the terminal device can obtain a more accurate absolute time, thereby completing synchronization with the network device and improving the accuracy of synchronization.
  • FIG. 12 is a schematic diagram of another embodiment of a communication method in an embodiment of this application.
  • another embodiment of the communication method in the embodiment of the present application may include:
  • the terminal device acquires a first system message.
  • the first system message carries second time information, and the second time information is the time corresponding to the boundary of the time window for sending the first system message.
  • the terminal device can obtain the first system message in different ways. For example, the terminal device can receive a broadcast message sent by the network device, or the terminal device can send a request message to the network device to request the network device to send the first system message.
  • the second time information is the time corresponding to the boundary of the first time window for sending the first system message.
  • SIB9 provides system time information.
  • the network device may periodically broadcast and/or multicast the SIB9, or the network device may send the SIB9 to the terminal device through unicast message RRC signaling based on the request of the terminal device.
  • the SI-window corresponding to SIB9 is the fifth system frame to the tenth system frame.
  • the boundary of the fifth system frame can be regarded as the starting boundary of the SI-window, and the boundary of the tenth system frame can be regarded as The end boundary of the SI-window.
  • the terminal device needs to monitor the start position of the SI-window until the SIB message in the SI is successfully received, so the terminal device can obtain the time corresponding to the start boundary of the SI-window or the end boundary of the SI-window.
  • the terminal device determines a third time according to the second time information and a timing advance (time advance, TA).
  • TA timing advance
  • the third time can be T2+TA/2, and the third time is the time corresponding to the end boundary of the SI-window receiving the first system message .
  • the third time can be T3+TA/2, and the third time is the start boundary of the SI-window receiving the first system message The corresponding moment.
  • the terminal device determines that the first timer has not expired.
  • the TA is the TA that was maintained in the connected state the last time the terminal device was transferred to the idle state, and the first timer is started when the terminal device switches from the connected state to the idle state, and the first timer runs In the process, the terminal device considers that the TA is valid and can be used. When the first timer expires, the terminal device considers that the TA is invalid and cannot be used.
  • the first timer duration T is configured by the network device; or the first timer duration T is determined by the terminal device according to the mobile state, where the mobile state may include the mobile speed of the terminal device, for example, if the terminal device determines that the terminal device is currently moving If the speed is v1, the terminal device can configure the duration T of the first timer as T2. If the terminal device determines that the current moving speed is v2, where v2 is greater than v1, the terminal device can configure the duration T of the first timer as T3. , Where T3 is less than T2; or the duration T is determined by the terminal device according to the mobile status and the configuration of the network device.
  • the terminal device can be based on T3 and based on its own mobile State, for example, configure the duration of the first timer as T4 according to its own moving speed or moving direction or moving route, where T4 may be greater than T3 or T4 may be less than T3.
  • the terminal device can combine the TA with the absolute time sent by the network device, so that the terminal device can obtain a more accurate absolute time, thereby completing synchronization with the network device, and improving synchronization accuracy.
  • the foregoing mainly introduces the solutions provided by the embodiments of the present application from the perspective of interaction between network devices and terminal devices.
  • the above-mentioned network equipment and terminal equipment include corresponding hardware structures and/or software modules for performing various functions.
  • the present application can be implemented in the form of hardware or a combination of hardware and computer software. Whether a certain function is executed by hardware or computer software-driven hardware depends on the specific application and design constraint conditions of the technical solution. Professionals and technicians can use different methods for each specific application to implement the described functions, but such implementation should not be considered beyond the scope of this application.
  • the terminal equipment and network equipment in Figures 4 to 12 can be implemented by one physical device, or can be implemented by multiple physical devices, or can be a logical function module in one physical device. The embodiment does not specifically limit this.
  • FIG. 13 is a schematic diagram of the hardware structure of a communication device provided by an embodiment of the application. It includes: a communication interface 1301 and a processor 1302, and may also include a memory 1303.
  • the communication interface 1301 can use any device such as a transceiver to communicate with other devices or communication networks, such as Ethernet, radio access network (RAN), wireless local area networks (WLAN), etc. .
  • a transceiver to communicate with other devices or communication networks, such as Ethernet, radio access network (RAN), wireless local area networks (WLAN), etc. .
  • RAN radio access network
  • WLAN wireless local area networks
  • the processor 1302 includes but is not limited to a central processing unit (CPU), a network processor (NP), an application-specific integrated circuit (ASIC) or a programmable logic device (programmable logic device, PLD) one or more.
  • the above-mentioned PLD may be a complex programmable logic device (CPLD), a field-programmable gate array (FPGA), a generic array logic (GAL) or any combination thereof.
  • the processor 1302 is responsible for the communication line 1304 and general processing, and can also provide various functions, including timing, peripheral interfaces, voltage regulation, power management, and other control functions.
  • the memory 1303 may be used to store data used by the processor 1302 when performing operations.
  • the memory 1303 can be a read-only memory (ROM) or other types of static storage devices that can store static information and instructions, random access memory (RAM), or other types that can store information and instructions
  • the dynamic storage device can also be electrically erasable programmable read-only memory (electrically programmable read-only memory, EEPROM), compact disc read-only memory (CD-ROM) or other optical disk storage, Optical disc storage (including compact disc, laser disc, optical disc, digital versatile disc, Blu-ray disc, etc.), magnetic disk storage media or other magnetic storage devices, or can be used to carry or store desired program codes in the form of instructions or data structures and can Any other medium accessed by the computer, but not limited to this.
  • the memory may exist independently and is connected to the processor 1302 through a communication line 1304.
  • the memory 1303 may also be integrated with the processor 1302. If the memory 1303 and the processor 1302 are independent devices, the memory 1303 and the processor 1302 are connected, for example, the memory 1303 and the processor 1302 can communicate through a communication line.
  • the communication interface 1301 and the processor 1302 may communicate through a communication line, and the communication interface 1301 may also be directly connected to the processor 1302.
  • the communication line 1304 may include any number of interconnected buses and bridges, and the communication line 1304 links various circuits including one or more processors 1302 represented by the processor 1302 and a memory represented by the memory 1303 together.
  • the communication line 1304 can also link various other circuits such as peripheral devices, voltage regulators, power management circuits, etc., which are all known in the art, and therefore, this application will not further describe them.
  • the terminal device may include: a memory for storing computer-readable instructions. It also includes a communication interface coupled with the memory, configured to obtain a first message, the first message carrying first time information, the identifier of the first system frame, and transmission delay reference information, and the first time information is the first system frame boundary The corresponding moment.
  • a processor coupled with the communication interface, configured to execute computer-readable instructions in the memory to perform the following operations:
  • the second moment is determined according to the first time information and the transmission delay reference information, the second moment is a moment corresponding to the second system frame boundary of the terminal device, and the frame identifiers of the first system frame and the second system frame are the same.
  • the transmission delay reference information is location information of the network device.
  • the processor is specifically configured to determine the second moment according to the first time information and the first transmission delay.
  • the first transmission delay is determined according to the location information of the network device and the location information of the terminal device.
  • the transmission delay reference information is the second transmission delay between the network device and the first location.
  • the processor is specifically configured to determine the second moment according to the first time information, the second transmission delay, and the third transmission delay. Wherein, the third transmission delay is determined according to the terminal device and the first location.
  • the transmission delay reference information is the transmission power of the network device.
  • the processor is specifically configured to determine the second moment according to the first time information and the fourth transmission delay.
  • the fourth transmission delay is a transmission delay between the network device and the terminal device determined according to the path loss, and the path power loss is determined according to the transmission power of the network device.
  • the fourth transmission delay is determined according to one or more of path power loss, information transmission frequency, and information transmission speed.
  • the path power loss is determined according to the transmission power of the network device and the reception of the terminal device. The power is determined.
  • the terminal device includes a memory for storing computer-readable instructions.
  • It also includes a communication interface coupled with the memory, configured to obtain a first message, the first message carrying first time information and an identifier of the first system frame, and the first time information is a time corresponding to the boundary of the first system frame.
  • a processor coupled with the communication interface, configured to execute computer-readable instructions in the memory to perform the following operations:
  • the second moment is determined according to the first time information and the timing advance TA, the second moment is a moment corresponding to the second system frame boundary of the terminal device, and the frame identifiers of the first system frame and the second system frame are the same.
  • TA corresponds to the first timer, and the duration of the first timer is T.
  • the processor is further configured to determine that the first timer has not expired.
  • the terminal device duration T is configured by the network device. Or the duration T is determined by the terminal device according to the moving state. Or the duration T is determined by the terminal device according to the mobile state and the configuration of the network device.
  • the communication interface can be regarded as the transceiver unit of the terminal device
  • the processor with processing function can be regarded as the processing unit of the terminal device
  • the memory can be regarded as the storage unit of the terminal device.
  • the terminal device includes a transceiver unit 1410 and a processing unit 1420.
  • the transceiver unit may also be referred to as a transceiver, a transceiver, a transceiver, and so on.
  • the processing unit may also be called a processor, a processing board, a processing module, a processing device, and so on.
  • the device for implementing the receiving function in the transceiver unit 1410 can be regarded as the receiving unit, and the device for implementing the sending function in the transceiver unit 1410 as the sending unit, that is, the transceiver unit 1410 includes a receiving unit and a sending unit.
  • the transceiver unit may sometimes be called a transceiver, transceiver, or transceiver circuit.
  • the receiving unit may sometimes be called a receiver, receiver, or receiving circuit.
  • the transmitting unit may sometimes be called a transmitter, a transmitter, or a transmitting circuit.
  • the transceiving unit 1410 is configured to perform the obtaining operation on the terminal device side in step 401 in FIG. 4, and/or the transceiving unit 1410 is further configured to perform other transceiving steps on the terminal device side in the embodiment of the present application.
  • the processing unit 1420 is configured to execute step 402 in FIG. 4, and/or the processing unit 1420 is further configured to execute other processing steps on the terminal device side in the embodiment of the present application.
  • the transceiving unit 1410 is used to perform the obtaining operation on the terminal device side in step 501 in FIG. 5, and/or the transceiving unit 1410 is also used to perform other transceiving steps on the terminal device side in the embodiment of the present application.
  • the processing unit 1420 is configured to execute step 502 in FIG. 5, and/or the processing unit 1420 is further configured to execute other processing steps on the terminal device side in the embodiment of the present application.
  • the transceiving unit 1410 is used to perform the obtaining operation on the terminal device side in step 601 in FIG. 6, and/or the transceiving unit 1410 is further used to perform other transceiving steps on the terminal device side in the embodiment of the present application.
  • the processing unit 1420 is configured to execute step 602, step 603, and step 604 in FIG. 6, and/or the processing unit 1420 is further configured to execute other processing steps on the terminal device side in the embodiment of the present application.
  • the transceiving unit 1410 is configured to perform the obtaining operation on the terminal device side in step 901 in FIG. 9, and/or the transceiving unit 1410 is further configured to perform other transceiving steps on the terminal device side in the embodiment of the present application.
  • the processing unit 1420 is configured to execute step 902, step 903, and step 904 in FIG. 9, and/or the processing unit 1420 is further configured to execute other processing steps on the terminal device side in the embodiment of the present application.
  • the transceiving unit 1410 is configured to perform the obtaining operation on the terminal device side in step 1001 in FIG. 10, and/or the transceiving unit 1410 is further configured to perform other transceiving steps on the terminal device side in the embodiment of the present application.
  • the processing unit 1420 is configured to execute step 1002, step 1003, step 1004, and step 1005 in FIG. 10, and/or the processing unit 1420 is further configured to execute other processing steps on the terminal device side in the embodiment of the present application.
  • the transceiving unit 1410 is used to perform the acquisition operation on the terminal device side in step 1101 in FIG. 11, and/or the transceiving unit 1410 is also used to perform other transceiving steps on the terminal device side in the embodiment of the present application.
  • the processing unit 1420 is configured to execute steps 1102 and 1103 in FIG. 11, and/or the processing unit 1420 is further configured to execute other processing steps on the terminal device side in the embodiment of the present application.
  • the transceiving unit 1410 is used to perform the obtaining operation on the terminal device side in step 1201 in FIG. 12, and/or the transceiving unit 1410 is also used to perform other transceiving steps on the terminal device side in the embodiment of the present application.
  • the processing unit 1420 is configured to perform step 1202 and step 1203 in FIG. 12, and/or the processing unit 1420 is further configured to perform other processing steps on the terminal device side in the embodiment of the present application.
  • FIG. 15 shows a schematic diagram of the hardware structure of a communication device provided by an embodiment of the application. It includes a communication interface 1501 and a processor 1502, and may also include a memory 1503.
  • the communication interface 1501 may use any device such as a transceiver to communicate with other devices or communication networks.
  • the processor 1502 includes, but is not limited to, a central processing unit (CPU), a network processor (NP), an application-specific integrated circuit (ASIC) or a programmable logic device (programmable logic device, PLD) one or more.
  • the above-mentioned PLD may be a complex programmable logic device (CPLD), a field-programmable gate array (FPGA), a general array logic (generic array logic, GAL), or any combination thereof.
  • the processor 1502 is responsible for the communication line 1504 and general processing, and can also provide various functions, including timing, peripheral interfaces, voltage regulation, power management, and other control functions.
  • the memory 1503 may be used to store data used by the processor 1502 when performing operations.
  • the memory 1503 may be a read-only memory (ROM) or other types of static storage devices that can store static information and instructions, random access memory (RAM), or other types that can store information and instructions
  • the dynamic storage device can also be electrically erasable programmable read-only memory (electrically programmable read-only memory, EEPROM), compact disc read-only memory (CD-ROM) or other optical disk storage, Optical disc storage (including compact disc, laser disc, optical disc, digital versatile disc, Blu-ray disc, etc.), magnetic disk storage media or other magnetic storage devices, or can be used to carry or store desired program codes in the form of instructions or data structures and can Any other medium accessed by the computer, but not limited to this.
  • the memory can exist independently and is connected to the processor 1502 through a communication line 1504.
  • the memory 1503 may also be integrated with the processor 1502. If the memory 1503 and the processor 1502 are independent devices, the memory 1503 and the processor 1502 are connected, for example, the memory 1503 and the processor 1502 can communicate through a communication line.
  • the communication interface 1501 and the processor 1502 may communicate through a communication line, and the communication interface 1501 may also be directly connected to the processor 1502.
  • the communication line 1504 may include any number of interconnected buses and bridges, and the communication line 1504 links various circuits including one or more processors 1502 represented by the processor 1502 and a memory represented by the memory 1503 together.
  • the communication line 1504 can also link various other circuits such as peripheral devices, voltage regulators, power management circuits, etc., which are all known in the art, and therefore, this application will not further describe them.
  • the network device may include: a memory for storing computer-readable instructions.
  • It also includes a communication interface coupled with the memory, configured to send a first message, the first message carrying first time information, the identifier of the first system frame, and transmission delay reference information, and the first time information is the first system frame boundary
  • the first time information and the transmission delay reference information are used to indicate the second time
  • the second time is the time corresponding to the second system frame boundary of the terminal device
  • the frame identifiers of the first system frame and the second system frame are the same .
  • the transmission delay reference information is location information of the network device, and the location information of the network device indicates the first transmission delay between the network device and the terminal device.
  • the transmission delay reference information is a second transmission delay between the network device and the first location, and the second transmission delay is used to indicate the second time.
  • the transmission delay reference information is the transmission power of the network device, and the transmission indicates the path power loss, and the path power loss is related to the fourth transmission delay between the terminal device and the network device.
  • the network device may include: a memory for storing computer-readable instructions. It also includes a communication interface coupled with the memory, configured to send a first message, the first message carrying the first time information and the identifier of the first system frame.
  • the communication interface is also used to send the timing advance TA.
  • the first time information and TA are used by the terminal device to determine the second moment.
  • the second moment is the moment corresponding to the second system frame boundary of the terminal device.
  • the first system frame and the second The frame ID of the system frame is the same.
  • it further includes: a processor coupled with the communication interface, configured to execute computer-readable instructions in the memory to perform the following operations: configure the first timer of the terminal device to have a duration of T, and the first timer The timer has not timed out for the terminal device to determine the TA is valid.
  • the communication interface can be regarded as the transceiver unit of the network device
  • the processor with processing function can be regarded as the processing unit of the network device
  • the memory can be regarded as the storage unit of the network device.
  • the network device may include a transceiver unit 1610 and a processing unit 1620.
  • the transceiver unit may also be referred to as a transceiver, a transceiver, a transceiver, and so on.
  • the processing unit may also be called a processor, a processing board, a processing module, a processing device, and so on.
  • the device for implementing the receiving function in the transceiver unit 1610 can be regarded as the receiving unit, and the device for implementing the sending function in the transceiver unit 1610 as the sending unit, that is, the transceiver unit 1610 includes a receiving unit and a sending unit.
  • the transceiver unit may sometimes be called a transceiver, a transceiver, or a transceiver circuit.
  • the receiving unit may sometimes be called a receiver, receiver, or receiving circuit.
  • the transmitting unit may sometimes be called a transmitter, a transmitter, or a transmitting circuit.
  • the transceiving unit 1610 is used to perform the transceiving operations on the network device side in step 401 in FIG. 4, and/or the transceiving unit 1610 is also used to perform other transceiving steps on the network device side in this embodiment of the application. .
  • the transceiving unit 1610 is used to perform the transceiving operations on the network device side in step 501 in FIG. 5, and/or the transceiving unit 1610 is also used to perform other transceiving steps on the network device side in the embodiment of the present application. .
  • the transceiving unit 1610 is used to perform the transceiving operations on the network device side in step 601 in FIG. 6, and/or the transceiving unit 1610 is also used to perform other transceiving steps on the network device side in the embodiment of the present application. .
  • the transceiving unit 1610 is used to perform the transceiving operations on the network device side in step 901 in FIG. 9, and/or the transceiving unit 1610 is also used to perform other transceiving steps on the network device side in the embodiment of the present application. .
  • the transceiving unit 1610 is used to perform the transceiving operations on the network device side in step 1001 in FIG. 10, and/or the transceiving unit 1610 is also used to perform other transceiving steps on the network device side in the embodiment of the present application. .
  • the transceiving unit 1610 is used to perform the transceiving operations on the network device side in step 1101 in FIG. 11, and/or the transceiving unit 1610 is also used to perform other transceiving steps on the network device side in the embodiment of the present application.
  • the processing unit 1620 is configured to execute step 1103 in FIG. 11, and/or the processing unit 1620 is further configured to execute other processing steps on the terminal device side in the embodiment of the present application.
  • the transceiving unit 1610 is used to perform the transceiving operations on the network device side in step 1201 in FIG. 12, and/or the transceiving unit 1610 is also used to perform other transceiving steps on the network device side in the embodiment of the present application.
  • the processing unit 1620 is configured to execute step 1203 in FIG. 12, and/or the processing unit 1620 is further configured to execute other processing steps on the terminal device side in the embodiment of the present application.
  • the computer program product includes one or more computer instructions.
  • the computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices.
  • the computer instructions may be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another computer-readable storage medium.
  • the computer instructions may be transmitted from a website, computer, server, or data center. Transmission to another website site, computer, server or data center via wired (such as coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (such as infrared, wireless, microwave, etc.).
  • wired such as coaxial cable, optical fiber, digital subscriber line (DSL)
  • wireless such as infrared, wireless, microwave, etc.
  • the computer-readable storage medium may be any available medium that can be stored by a computer or a data storage device such as a server or data center integrated with one or more available media.
  • the usable medium may be a magnetic medium (for example, a floppy disk, a hard disk, a magnetic tape), an optical medium (for example, a DVD), or a semiconductor medium (for example, a solid state disk (SSD)).
  • the program can be stored in a computer-readable storage medium, and the storage medium can include: ROM, RAM, magnetic disk or CD, etc.

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  • Mobile Radio Communication Systems (AREA)

Abstract

Des modes de réalisation de la présente invention concernent un procédé de communication, comprenant les étapes suivantes : un dispositif terminal acquiert un moment correspondant à une première limite de trame de système, un identifiant d'une première trame de système et des informations de référence de retard de transmission ; en fonction de premières informations temporelles et des informations de référence de retard de transmission, le dispositif terminal détermine un moment correspondant à une seconde limite de trame de système, les identifiants de la première trame de système et d'une seconde trame de système étant identiques. Au moyen de la solution décrite dans la présente invention, un dispositif terminal peut acquérir un temps absolu plus précis, ce qui permet d'achever ainsi la synchronisation avec un dispositif réseau et d'augmenter la précision de synchronisation.
PCT/CN2020/079682 2019-04-30 2020-03-17 Procédé de communication, dispositif terminal et dispositif réseau WO2020220851A1 (fr)

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