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WO2023020367A1 - Procédé de transmission de données et appareil associé - Google Patents

Procédé de transmission de données et appareil associé Download PDF

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Publication number
WO2023020367A1
WO2023020367A1 PCT/CN2022/111954 CN2022111954W WO2023020367A1 WO 2023020367 A1 WO2023020367 A1 WO 2023020367A1 CN 2022111954 W CN2022111954 W CN 2022111954W WO 2023020367 A1 WO2023020367 A1 WO 2023020367A1
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WIPO (PCT)
Prior art keywords
cell
value
coverage area
network device
timing advance
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PCT/CN2022/111954
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English (en)
Chinese (zh)
Inventor
雷珍珠
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Spreadtrum Semiconductor Nanjing Co Ltd
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Spreadtrum Semiconductor Nanjing Co Ltd
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Publication of WO2023020367A1 publication Critical patent/WO2023020367A1/fr
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Ceased legal-status Critical Current

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/02—Arrangements for optimising operational condition

Definitions

  • the present application relates to the technical field of wireless communication, and in particular to a data transmission method and a related device.
  • NTN non-terrestrial networks
  • the terminal equipment has the global navigation satellite system (global navigation satellite system, GNSS) positioning capability, that is, the terminal equipment can obtain its own information based on ephemeris information and GNSS.
  • RTT round-trip time
  • TA timing advance
  • the terminal device does not have GNSS capabilities, cannot obtain its own position information, and cannot calculate the RTT between the terminal device and the serving satellite, and thus cannot determine the total TA pre-compensation for accurate uplink data transmission value, resulting in out-of-synchronization of the uplink, seriously affecting the reliability of the uplink transmission of the terminal equipment.
  • the embodiment of the present application provides a data transmission method and a related device.
  • the terminal device can determine the target used to represent the RTT between the terminal device and the serving satellite by receiving the first TA value sent by the first network device or the second network device.
  • TA value so as to determine the total TA pre-compensation value of the uplink data transmission between the terminal device and the first network device, avoid the uplink out-of-synchronization of the terminal device in the Non-GNSS scenario, and greatly improve the reliability of the uplink transmission of the terminal device.
  • the embodiment of the present application provides a data transmission method applied to a terminal device, and the method includes:
  • the first network device is a network device corresponding to a first cell
  • the second network device is a network device corresponding to a second cell
  • the first network device is a network device corresponding to a second cell.
  • the coverage area of the second cell overlaps with the coverage area of the first cell
  • the first TA value is a round-trip transmission delay value from a satellite corresponding to the first cell to a reference point in the coverage area of the second cell ;
  • the first aspect provides a data transmission method applied to the terminal device side.
  • the terminal device first receives the first TA value sent by the first network device or the second network device, and then determines the target TA value according to the first TA value, and finally Perform uplink data transmission with the first network device according to the target TA value.
  • the first network device is a network device corresponding to the first cell, such as a network device such as a base station in the first cell
  • the second network device is a network device corresponding to the second cell, such as a network device such as a base station in the second cell.
  • the coverage area of the first cell overlaps with the coverage area of the second cell.
  • the coverage area of the first cell may partially overlap the coverage area of the second cell, or the coverage area of the first cell completely includes the coverage area of the second cell.
  • the terminal device may be located in an overlapping portion of the coverage areas of the first cell and the second cell.
  • the above-mentioned received first TA value is a round-trip transmission delay value from the satellite corresponding to the first cell to the reference point in the coverage area of the second cell.
  • the total TA pre-compensation value of uplink data transmission by a network device makes the uplink transmission time more accurate, avoids uplink out-of-sync of terminal equipment in Non-GNSS scenarios, and greatly improves the reliability of uplink transmission of terminal equipment.
  • the first TA value is obtained according to location information of a coverage area of the second cell and location information of a satellite corresponding to the first cell.
  • the first TA value received by the terminal device is obtained according to the location information of the coverage area of the second cell and the location information of the satellite corresponding to the first cell.
  • the first TA value may be determined by the first network device according to the location information of the coverage area of the second cell and the location information of the satellite corresponding to the first cell, and sent to the terminal device; the first TA value may also be It is determined and obtained by the second network device according to the location information of the coverage area of the second cell and the location information of the satellite corresponding to the first cell, and sent to the terminal device.
  • the accuracy of the first TA value received is higher, so the accuracy of the target TA value determined based on the first TA value is also higher, which can improve the accuracy of the uplink transmission time of the terminal device and avoid uplink out-of-sync , so as to improve the reliability of the uplink transmission of the terminal equipment.
  • the receiving the first TA value sent by the second network device includes:
  • This possible implementation manner provides a possible specific implementation manner of receiving the first TA value, specifically, when the terminal device has not established a radio resource control connection with the second cell, that is, the terminal device is in the In the idle state or the inactive state, the terminal device obtains the above-mentioned first TA value by receiving the broadcast message sent by the second network device; or, when the terminal device establishes a radio resource control connection with the second cell, that is, the terminal device For the case where the second cell is in the connected state, the terminal device acquires the above-mentioned first TA value by receiving a broadcast message or radio resource control signaling or media access layer control signaling sent by the second network device.
  • the determining the target TA value according to the first TA value includes:
  • the sum of the second TA value and/or the third TA value, and the first TA value is used as the target TA value; the second TA value and the third TA value are determined by the first cell
  • the corresponding broadcast message obtains that the second TA value is a public TA value broadcast by the first cell, and the third TA value includes a timing adjustment value and/or a timing offset value issued by the first cell.
  • This possible implementation method provides a possible specific implementation method of determining the target TA value according to the first TA value, specifically, the terminal device determines the received first TA value as the target TA value, and the target TA value It is used to indicate the timing of sending uplink data to the first network device.
  • the terminal device determines the sum of the second TA value and/or the third TA value, and the above-mentioned received first TA value as the target TA value, and the target TA value is used to indicate the time to send uplink data to the first network device Timing, specifically, the terminal device may use the sum of the second TA value and the first TA value as the target TA value, or use the sum of the third TA value and the first TA value as the target TA value, or use the first TA value The sum of the second TA value and the third TA value is taken as the target TA value.
  • the above-mentioned second TA value and third TA value are obtained from the broadcast message corresponding to the first cell
  • the second TA value is a public TA value broadcast by the first cell
  • the third TA value includes the timing issued by the first cell Adjustment value and/or timing offset value.
  • the performing uplink data transmission with the first network device according to the target TA value includes:
  • the uplink data includes physical random access channel data, or physical uplink shared channel data, or physical uplink control channel data.
  • the reference point is a point within the coverage area of the second cell that is closest to the satellite corresponding to the first cell, or is a point within the coverage area of the second cell relative to Any fixed point of the satellite position corresponding to the second cell.
  • the satellite corresponding to the first cell and the satellite corresponding to the second cell are in the same satellite orbit, or in different satellite orbits.
  • the method also includes:
  • This possible implementation mode provides a possible specific implementation mode of monitoring the random access response window, specifically, in the case that the terminal device initiates random access to the first cell, first determine according to the above-mentioned first TA value The initial position of the random access response window, and then start monitoring the random access response window at the initial position of the random access response window.
  • the initial position of the random access response window can be determined more accurately, so that the monitoring of the random access response window can be started more accurately.
  • the determining the starting position of the random access response window according to the first TA value includes:
  • the second TA value or the first delay value, and the sum of the first TA value is used as the second delay value; the second TA value and the first delay value are corresponding to the first cell
  • the broadcast message is obtained, the second TA value is the public TA value broadcast by the first cell, and the first delay value is the effective delay value of the media access layer control unit of the first cell;
  • a possible specific implementation manner of determining the starting position of the random access response window according to the first TA value is provided, specifically, the second TA value or the first delay value, and the above-mentioned The sum of the first TA value is determined as the second delay value.
  • the sum of the second TA value and the above-mentioned first TA value may be used as the second delay value, or the first delay value and the above-mentioned
  • the sum of the first TA value may be used as the second delay value, or the sum of the second TA value, the first delay value, and the above-mentioned first TA value may be used as the second delay value;
  • the second time after the end position of the first message Msg1 will be sent to the first cell
  • the position of the extension value is determined as the initial position of the random access response window.
  • the determined initial position of the random access response window has higher accuracy, and the monitoring of the random access response window can be started more accurately.
  • the embodiment of the present application provides a data transmission method applied to a first network device, and the method includes:
  • the first network device is a network device corresponding to the first cell
  • the second network device is a network device corresponding to the second cell, so The coverage area of the second cell overlaps with the coverage area of the first cell
  • the first TA value is from the satellite corresponding to the first cell to the first cell
  • the second aspect provides a data transmission method applied to the side of the first network device.
  • the first network device first receives the location information of the coverage area of the second cell sent by the second network device, and then according to the coverage area of the second cell
  • the location information of the first cell and the location information of the satellite corresponding to the first cell are determined to determine the first TA value, and finally the determined first TA value is sent to the terminal device.
  • the first network device is the network device corresponding to the first cell, such as the network device such as the base station of the first cell
  • the second network device is the network device corresponding to the second cell, such as the network device such as the base station of the second cell
  • the terminal device is established A device for dual connection between the first cell and the second cell.
  • the coverage area of the first cell overlaps with the coverage area of the second cell.
  • the first cell and the second cell may intersect but not overlap, or the second cell may include
  • the determined first TA value is a round-trip transmission delay value from the satellite corresponding to the first cell to the reference point within the coverage area of the second cell.
  • the target TA used to represent the RTT between the terminal device and the serving satellite can be determined Value, so as to determine the total TA pre-compensation value of the uplink data transmission between the terminal device and the first network device, so that the accuracy of the uplink transmission time is high, avoiding the uplink out-of-sync of the terminal device in the Non-GNSS scenario, and greatly improving the terminal Reliability of device uplink transmission.
  • the sending the first TA value to the terminal device includes:
  • radio resource control signaling or media access layer control signaling to the terminal device, where the radio resource control signaling or the media access layer control signaling is used to indicate the first TA to the terminal device value.
  • This possible implementation manner provides a possible specific implementation manner of sending the first TA value to the terminal device, specifically, sending radio resource control signaling or media access layer control signaling to the terminal device, which is used to send the first TA value to the terminal device.
  • the terminal device indicates the first TA value determined by the first network device.
  • the reference point is a point within the coverage area of the second cell that is closest to the satellite corresponding to the first cell, or is a point within the coverage area of the second cell relative to Any fixed point of the satellite position corresponding to the second cell.
  • the satellite corresponding to the first cell and the satellite corresponding to the second cell are in the same satellite orbit, or in different satellite orbits.
  • the embodiment of the present application provides a data transmission method, which is applied to a second network device, and the method includes:
  • the second network device is the second The network device corresponding to the cell
  • the first TA value is the round-trip transmission delay value from the satellite corresponding to the first cell to the reference point in the coverage area of the second cell
  • the coverage area of the second cell is the same as The coverage areas of the first cell overlap
  • the first network device is a network device corresponding to the first cell
  • the second network device is a network device corresponding to the second cell
  • the location information of the coverage area of the second cell is used to determine a first TA value
  • the first TA value is a round-trip transmission from a satellite corresponding to the first cell to a reference point in the coverage area of the second cell Delay value, the coverage area of the second cell overlaps with the coverage area of the first cell.
  • the third aspect provides a data transmission method applied to the side of the second network device.
  • the second network device sends the first TA value determined by the second network device to the terminal device, or the second network device sends the first TA value to the first network device.
  • the device sends location information of the coverage area of the second cell.
  • the second network device determines the first TA value according to the location information of the coverage area of the second cell and the location information of the satellite corresponding to the first cell, and then sends the first TA value to the terminal device; or, the second The network device directly sends the location information of the coverage area of the second cell to the first network device, and the first network device determines the location information of the second cell based on the received location information of the coverage area of the second cell and the location information of the satellite corresponding to the first cell. A TA value, and then the first network device sends the determined first TA value to the terminal device.
  • the first network device is the network device corresponding to the first cell, such as the network device such as the base station of the first cell
  • the second network device is the network device corresponding to the second cell, such as the network device such as the base station of the second cell
  • the terminal device is established A device for dual connection between the first cell and the second cell.
  • the coverage area of the first cell overlaps with the coverage area of the second cell.
  • the first cell and the second cell may intersect but not overlap, or the second cell may include
  • the determined first TA value is a round-trip transmission delay value from the satellite corresponding to the first cell to the reference point within the coverage area of the second cell.
  • the target TA used to represent the RTT between the terminal device and the serving satellite can be determined Value, so as to determine the total TA pre-compensation value of the uplink data transmission between the terminal device and the first network device, so that the accuracy of the uplink transmission time is high, avoiding the uplink out-of-sync of the terminal device in the Non-GNSS scenario, and greatly improving the terminal Reliability of device uplink transmission.
  • the sending the first TA value to the terminal device includes:
  • the terminal device When no radio resource control connection is established with the terminal device, send a broadcast message; the broadcast message is used to indicate the first TA value; or,
  • the broadcast message or The radio resource control signaling or the medium access layer control signaling is used to indicate the first TA value.
  • This possible implementation mode provides a possible specific implementation mode of sending the first TA value to the terminal device, specifically, when no radio resource control connection is established with the terminal device, that is, the second cell is in an idle state Or in the case of an inactive state, the second network device indicates the first TA value determined by the second network device by sending a broadcast message; or, when establishing a radio resource control connection with the terminal device, that is, for the second When the cell is in the connected state, the second network device indicates the first TA value determined by the second network device by sending a broadcast message or radio resource control signaling or media access layer control signaling.
  • the reference point is a point within the coverage area of the second cell that is closest to the satellite corresponding to the first cell, or is a point within the coverage area of the second cell relative to Any fixed point of the satellite position corresponding to the second cell.
  • the satellite corresponding to the first cell and the satellite corresponding to the second cell are in the same satellite orbit, or in different satellite orbits.
  • the embodiment of the present application provides a data transmission device, which includes:
  • the receiving unit is configured to receive the first TA value sent by the first network device or the second network device; the first network device is the network device corresponding to the first cell, and the second network device is the network corresponding to the second cell In the device, the coverage area of the second cell overlaps with the coverage area of the first cell, and the first TA value is a distance from a satellite corresponding to the first cell to a reference point in the coverage area of the second cell Round-trip transmission delay value;
  • a determining unit configured to determine a target TA value according to the first TA value
  • a transmission unit configured to perform uplink data transmission with the first network device according to the target TA value.
  • the first TA value is obtained according to location information of a coverage area of the second cell and location information of a satellite corresponding to the first cell.
  • the receiving unit is further configured to receive a broadcast message sent by the second network device when no radio resource control connection is established with the second cell, and obtain the first TA value; or,
  • the receiving unit is specifically further configured to receive a broadcast message or radio resource control signaling or media access layer control signaling sent by the second network device when a radio resource control connection is established with the second cell , to obtain the first TA value.
  • the determining unit is specifically configured to use the first TA value as the target TA value
  • the determining unit is specifically configured to use the sum of the second TA value and/or the third TA value and the first TA value as the target TA value; the second TA value and the third TA value
  • the TA value is obtained from the broadcast message corresponding to the first cell
  • the second TA value is a public TA value broadcast by the first cell
  • the third TA value includes a timing adjustment value issued by the first cell and/or timing offset values.
  • the transmission unit is specifically configured to advance the target TA value and send uplink data to the first network device;
  • the uplink data includes physical random access channel data, or physical uplink Shared channel data, or physical uplink control channel data.
  • the reference point is a point within the coverage area of the second cell that is closest to the satellite corresponding to the first cell, or is a point within the coverage area of the second cell relative to Any fixed point of the satellite position corresponding to the second cell.
  • the satellite corresponding to the first cell and the satellite corresponding to the second cell are in the same satellite orbit, or in different satellite orbits.
  • the device also includes:
  • the determining unit is further configured to determine a starting position of a random access response window according to the first TA value when initiating random access to the first cell;
  • the monitoring unit is configured to start monitoring the random access response window at the starting position of the random access response window.
  • the determining unit is specifically configured to use the sum of the second TA value or the first delay value and the first TA value as the second delay value; the second The TA value and the first delay value are obtained from the broadcast message corresponding to the first cell, the second TA value is a public TA value broadcast by the first cell, and the first delay value is the The effective delay value of the media access layer control unit of the first cell;
  • the determining unit is specifically further configured to determine the starting position of the random access response window according to the ending position of sending the first message Msg1 to the first cell and the second delay value.
  • the embodiment of the present application provides a data transmission device, which includes:
  • the receiving unit is configured to receive the location information of the coverage area of the second cell sent by the second network device;
  • the data transmission device is a device corresponding to the first cell, and the second network device is a network corresponding to the second cell The device, the coverage area of the second cell overlaps with the coverage area of the first cell;
  • a determining unit configured to determine a first TA value according to the location information of the coverage area of the second cell and the location information of the satellite corresponding to the first cell; the first TA value is a round-trip transmission delay value from the satellite to the reference point within the coverage area of the second cell;
  • a sending unit configured to send the first TA value to the terminal device.
  • the sending unit is specifically configured to send radio resource control signaling or media access layer control signaling to the terminal device, the radio resource control signaling or the media access
  • the layer control signaling is used to indicate the first TA value to the terminal device.
  • the reference point is a point within the coverage area of the second cell that is closest to the satellite corresponding to the first cell, or is a point within the coverage area of the second cell relative to Any fixed point of the satellite position corresponding to the second cell.
  • the satellite corresponding to the first cell and the satellite corresponding to the second cell are in the same satellite orbit, or in different satellite orbits.
  • the embodiment of the present application provides a data transmission device, which includes:
  • a determining unit configured to determine a first TA value according to position information of the coverage area of the second cell and position information of a satellite corresponding to the first cell;
  • a sending unit configured to send the first TA value to a terminal device;
  • the data transmission device is a device corresponding to the second cell, the first TA value is a round-trip transmission delay value from a satellite corresponding to the first cell to a reference point in the coverage area of the second cell, and the the coverage area of the second cell overlaps with the coverage area of the first cell;
  • the sending unit is configured to send the location information of the coverage area of the second cell to the first network device; the first network device is the network device corresponding to the first cell, and the data transmission device is the network device corresponding to the second cell The device, wherein the location information of the coverage area of the second cell is used to determine a first TA value, and the first TA value is a reference point from the satellite corresponding to the first cell to the coverage area of the second cell The round-trip transmission delay value of , the coverage area of the second cell overlaps with the coverage area of the first cell.
  • the sending unit is specifically configured to send a broadcast message when no radio resource control connection is established with the terminal device; the broadcast message is used to indicate the first TA value ;or,
  • the sending unit is specifically further configured to send a broadcast message or send a radio resource control signaling to the terminal device or send a media access layer message to the terminal device when a radio resource control connection is established with the terminal device.
  • Control signaling the broadcast message or the radio resource control signaling or the media access layer control signaling is used to indicate the first TA value.
  • the reference point is a point within the coverage area of the second cell that is closest to the satellite corresponding to the first cell, or is a point within the coverage area of the second cell relative to Any fixed point of the satellite position corresponding to the second cell.
  • the satellite corresponding to the first cell and the satellite corresponding to the second cell are in the same satellite orbit, or in different satellite orbits.
  • the embodiment of the present application provides a communication device, the communication device includes a processor and a memory; the memory is used to store computer-executable instructions; the processor is used to execute the computer-executable instructions stored in the memory, Make the communication device execute the method according to the above first aspect and any possible implementation manner, or enable the communication device to execute the method according to the above second aspect and any possible implementation manner, or make the The communication device executes the method according to the above third aspect and any possible implementation manner.
  • the communication device further includes a transceiver, configured to receive signals or send signals.
  • the embodiment of the present application provides a communication device, the communication device includes a logic circuit and an interface; the logic circuit is coupled to the interface; the interface is used to input and/or output code instructions, and the logic circuit uses To execute the code instructions, so that the communication device executes the method according to the above first aspect and any possible implementation manner, or causes the communication device to execute the method according to the above second aspect and any possible implementation manner method, or make the communication device execute the method according to the above third aspect and any possible implementation manner.
  • the embodiment of the present application provides a computer-readable storage medium, the computer-readable storage medium is used to store instructions or computer programs; when the instructions or the computer programs are executed, the first aspect and the The method described in any possible implementation manner is implemented, or the method described in the second aspect and any possible implementation manner is realized, or the method described in the third aspect and any possible implementation manner is realized. method is implemented.
  • the embodiment of the present application provides a computer program product, the computer program product includes instructions or computer programs; when the instructions or the computer programs are executed, the first aspect and any possible implementation The method described in the manner is realized, or the method described in the second aspect and any possible implementation manner is realized, or the method described in the third aspect and any possible implementation manner is realized.
  • the embodiment of the present application provides a chip
  • the chip includes a processor
  • the processor is used to execute instructions
  • the chip performs the first aspect and any one of The method described in a possible implementation manner, or make the chip execute the method described in the second aspect and any possible implementation manner, or make the chip execute the method described in the third aspect and any possible implementation manner Methods.
  • the chip further includes a communication interface, and the communication interface is used for receiving signals or sending signals.
  • the embodiment of the present application provides a system, the system includes at least one of the following: the data transmission device described in the fourth aspect, the data transmission device described in the fifth aspect, and the data transmission device described in the sixth aspect
  • the process of sending information and/or receiving information in the above method can be understood as the process of outputting information by the processor, and and/or, the process by which a processor receives incoming information.
  • the processor may output information to a transceiver (or a communication interface, or a sending module) for transmission by the transceiver. After the information is output by the processor, additional processing may be required before reaching the transceiver.
  • the transceiver or communication interface, or sending module
  • the information may require other processing before being input to the processor.
  • the sending information mentioned in the foregoing method can be understood as the processor outputting information.
  • receiving information may be understood as the processor receiving input information.
  • the above-mentioned processor may be a processor dedicated to executing these methods, or may execute computer instructions in the memory
  • a processor such as a general-purpose processor, to execute these methods.
  • the above-mentioned memory can be a non-transitory (non-transitory) memory, such as a read-only memory (Read Only Memory, ROM), which can be integrated with the processor on the same chip, or can be respectively arranged on different chips.
  • ROM read-only memory
  • the embodiment does not limit the type of the memory and the arrangement of the memory and the processor.
  • the above at least one memory is located outside the device.
  • the at least one memory is located within the device.
  • part of the memory of the at least one memory is located inside the device, and another part of the memory is located outside the device.
  • processor and the memory may also be integrated into one device, that is, the processor and the memory may also be integrated together.
  • FIG. 1 is a schematic diagram of an NTN scenario provided by an embodiment of the present application.
  • FIG. 2a is a schematic diagram of a scenario of dual connectivity in a cell provided by an embodiment of the present application
  • FIG. 2b is a schematic diagram of a scenario for determining a fixed TA value provided by an embodiment of the present application
  • FIG. 3 is an interactive schematic diagram of a random access provided in an embodiment of the present application.
  • FIG. 4 is a schematic flow diagram of a data transmission method provided by an embodiment of the present application.
  • FIG. 5 is a schematic diagram of a scenario for determining a TA value provided by an embodiment of the present application
  • FIG. 6 is a schematic flow diagram of another data transmission method provided by the embodiment of the present application.
  • Fig. 7a is a schematic flowchart of another data transmission method provided by the embodiment of the present application.
  • FIG. 7b is a schematic diagram of another scenario for determining the TA value provided by the embodiment of the present application.
  • FIG. 8 is a schematic structural diagram of a data transmission device provided by an embodiment of the present application.
  • FIG. 9 is a schematic structural diagram of another data transmission device provided by an embodiment of the present application.
  • FIG. 10 is a schematic structural diagram of another data transmission device provided by the embodiment of the present application.
  • FIG. 11 is a schematic structural diagram of a communication device provided by an embodiment of the present application.
  • FIG. 12 is a schematic structural diagram of another communication device provided by an embodiment of the present application.
  • an embodiment means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the present application.
  • the occurrences of this phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is understood explicitly and implicitly by those skilled in the art that the embodiments described herein can be combined with other embodiments.
  • At least one (item) means one or more
  • “multiple” means two or more
  • at least two (items) means two or three And three or more
  • "and/or” is used to describe the association relationship of associated objects, indicating that there can be three types of relationships, for example, "A and/or B” can mean: only A exists, only B exists, and A exists at the same time and B, where A and B can be singular or plural.
  • the character “/” generally indicates that the contextual objects are an "or” relationship.
  • “At least one of the following” or similar expressions refer to any combination of these items, including any combination of single or plural items.
  • At least one item (piece) of a, b or c can mean: a, b, c, "a and b", “a and c", “b and c", or "a and b and c ", where a, b, c can be single or multiple.
  • This application provides a data transmission method, specifically a data transmission method applicable to NTN communication scenarios.
  • a data transmission method specifically a data transmission method applicable to NTN communication scenarios.
  • some knowledge related to NTN data transmission will be introduced below.
  • Satellite communication has the characteristics of long communication distance, large coverage area, and flexible networking. It can provide communication services for both fixed terminals and various mobile terminals. Since the traditional terrestrial network cannot provide seamless coverage for terminal equipment, especially in places where base stations cannot be deployed in the sea, desert, and air, NTN is introduced into the fifth generation (The 5th Generation, 5G) mobile communication system. By deploying base stations or part of base station functions on high-altitude platforms or satellites, seamless coverage is provided for terminal equipment.
  • 5G The 5th Generation
  • high-altitude platforms or satellites are less affected by natural disasters, which can improve the reliability of 5G systems.
  • satellites cover the ground with different beams to form satellite cells, and a certain terminal device can be covered by multiple satellite cells at the same time.
  • the cellular network system may include but not limited to: 5G system, Global System of Mobile communication (GSM) system, Code Division Multiple Access (CDMA) system, Wideband Code Division Multiple Access (Wideband Code Division Multiple Access (WCDMA) system, General Packet Radio Service (GPRS), Long Term Evolution (LTE) system, LTE Frequency Division Duplex (FDD) system, LTE Time Division Duplex (Time Division Duplex, TDD) system, advanced long term evolution (Advanced long term evolution, LTE-A) system, new air interface (New Radio, NR) system, evolution system of NR system, LTE (LTE based access to unlicensed spectrum (LTE-U) system, NR (NR-based access to unlicensed spectrum, NR-U) system on the unlicensed frequency band, Universal Mobile Telecommunication System (UMTS), global interconnected microwave access ( Worldwide
  • the satellite communication system may include various non-terrestrial network systems, for example, a satellite or an unmanned aircraft system (unmanned aircraft system, UAS) platform, and other networks for wireless frequency transmission, which will not be listed here.
  • D2D Device to Device
  • M2M Machine to Machine
  • MTC Machine Type Communication
  • V2V Vehicle to Vehicle
  • the satellite communication system may include various non-terrestrial network systems, for example, a satellite or an unmanned aircraft system (unmanned aircraft system, UAS) platform, and other networks for wireless frequency transmission, which will not be listed here.
  • the NTN system can specifically be a satellite communication system or other non-terrestrial network system.
  • the data transmission method in this solution can be applied to satellite communication category.
  • FIG. 1 is a schematic diagram of an NTN scenario provided by an embodiment of the present application.
  • 104 represents a coverage area of a cell of a satellite 101 , and one or more terminal devices 102 may exist in the coverage area.
  • the coverage area 104 of the cell may be the area covered by one or more beams of the satellite, or the same area as the cell level in the NR system.
  • the ground terminal equipment 102 accesses the network through the 5G new air interface, and the 5G base station can be deployed on the satellite, and is connected to the 5G core network on the ground through a wireless link and the ground station 103 .
  • Terminal equipment Mobile equipment that supports 5G new air interface, typically mobile equipment such as user terminal and wearable equipment. It can access the satellite network through the air interface and initiate services such as calling and surfing the Internet.
  • 5G base station It mainly provides wireless access services, dispatches wireless resources to access terminals, and provides reliable wireless transmission protocols and data encryption protocols.
  • 5G core network including user access control, mobility management, session management, user security authentication, billing and other services. It consists of multiple functional units, which can be divided into functional entities of the control plane and the data plane.
  • Ground station responsible for forwarding signaling and business data between the satellite base station and the 5G core network.
  • 5G New Air Interface The wireless link between user equipment and base stations.
  • Xn interface It is the interface between the 5G base station and the base station, mainly used for signaling interaction such as handover.
  • NG interface It is the interface between the 5G base station and the 5G core network, mainly exchanging signaling such as the non-access stratum (Non-Access Stratum, NAS) of the core network, and user service data.
  • Non-Access Stratum Non-Access Stratum, NAS
  • the technical solution provided by this application mainly involves two executive entities, network equipment and terminal equipment, and can be applied to communication systems such as 5G, especially in the data transmission process of non-terrestrial networks.
  • the terminal equipment involved in the embodiment of the present application includes but is not limited to connection via wired lines, such as via public switched telephone network (Public Switched Telephone Networks, PSTN), digital subscriber line (Digital Subscriber Line, DSL), digital cable, direct cable connection and/or another data connection network; and/or via a wireless interface, such as: for a cellular network, a wireless local area network (Wireless Local Area Network, WLAN), such as a handheld digital television broadcast (Digital Video Broadcast-Handheld, DVB-H) digital television network, satellite network, AM-FM (Amplitude Modulation-Frequency Modulation, AM-FM) broadcast transmitter of the network; and/or another terminal equipment device configured to receive/transmit communication signals; and/or Internet of Things (IoT) devices.
  • PSTN Public Switched Telephone Networks
  • DSL Digital Subscriber Line
  • WLAN wireless local area network
  • AM-FM Amplitude Modulation-Frequency Modulation
  • AM-FM Internet of Things
  • a terminal device arranged to communicate over a wireless interface may be referred to as a "wireless communication terminal", “wireless terminal” or “mobile terminal”.
  • Examples of such terminal equipment include, but are not limited to, satellite or cellular telephones; Personal Communications System (PCS) terminals that may combine cellular radiotelephones with data processing, facsimile, and data communication capabilities; may include radiotelephones, pagers, Internet Personal digital assistants (PDAs) with intranet access, Web browsers, organizers, calendars, and/or Global Positioning System (GPS) receivers; and conventional laptops and/or palmtops type receivers or other electronic devices including radiotelephone transceivers.
  • PCS Personal Communications System
  • PDAs Internet Personal digital assistants
  • GPS Global Positioning System
  • Terminal equipment may also be called user equipment (user equipment, UE), access terminal, subscriber unit, subscriber station, mobile station, mobile station, remote station, remote terminal, mobile device, user terminal, terminal, wireless communication device, user agent or user device.
  • the terminal device can also be a cellular phone, a cordless phone, a session initiation protocol (SIP) phone, a wireless local loop (WLL) station, a PDA, a handheld device with wireless communication capabilities, a computing device, or a connected Other processing devices to wireless modems, vehicle-mounted devices, wearable devices, terminal devices in the 5G network or terminal devices in the future evolution of the public land mobile network (PLMN), etc.
  • PLMN public land mobile network
  • the network devices involved in the embodiments of this application can provide communication coverage in a specific geographical area, and can communicate with one or more terminal devices located in the coverage area, or can be used to communicate with one or more
  • the base station communicates (for example, the communication between the macro base station and the micro base station, such as an access point).
  • the network device may be a satellite, a base station (Base Transceiver Station, BTS) in a GSM system or a CDMA system, an evolved base station (evolved Node B, eNB) in an LTE system, or a base station in a 5G system or an NR system. Next generation node base station (gNB), and other satellite base stations and satellite relay nodes.
  • BTS Base Transceiver Station
  • eNB evolved Node B
  • gNB Next generation node base station
  • gNB Next generation node base station
  • the network device can also be an access point (access point, AP), a transport node (transport point, TRP), a central unit (central unit, CU) or other network entities, and can include some or all of the functions of the above network entities. All functions.
  • a device with a communication function in the network/system in the embodiments of the present application may be referred to as a communication device.
  • the communication equipment may include network equipment and terminal equipment with communication functions, and the network equipment and terminal equipment may be the specific equipment described above, which will not be repeated here; It includes other devices in the communication system, such as network controllers, mobility management entities and other network entities, which are not limited in this embodiment of the present application.
  • the two descriptions of "satellite” and “satellite network device” are equivalent. That is, the satellite mentioned in this application means a collection of satellites and other network equipment related to satellite communication.
  • a cell in the NTN system may be the projection area of one beam of the satellite on the ground, or the projection area of multiple beams of the satellite on the ground, or it may be the projection area of one or more beams on the ground. Part of the projected area on the ground.
  • the terminal device In order to obtain uplink synchronization with the satellite, when the terminal device sends uplink data, it needs to send it a period of time in advance, and this period of time can be called the total TA pre-compensation value of the terminal device.
  • the RTT value between the terminal device and the satellite needs to be calculated according to the ephemeris information and its own position information obtained by using GNSS.
  • the terminal device In the Non-GNSS scenario (that is, the terminal device does not have GNSS capabilities and cannot obtain its own location information), the terminal device cannot calculate the RTT between the terminal device and the serving satellite, and the terminal device is performing uplink transmission (for example, the terminal device sends the first A message Msg1) cannot determine the current TA value.
  • the network may configure a fixed TA value for the coverage area of each cell or the coverage area of each beam.
  • the distance between a point closest to the satellite in the coverage area of the cell or a beam coverage area corresponding to the cell and the satellite may be taken as the fixed transmission distance of the cell or a beam corresponding to the cell.
  • the round-trip transmission delay generated when the signal is transmitted round-trip over the fixed transmission distance of the cell or a beam corresponding to the cell is called the fixed round-trip delay of the cell or a beam corresponding to the cell.
  • the fixed round-trip delay of the cell or a beam corresponding to the cell is recorded as the fixed TA value of the cell or a beam corresponding to the cell
  • the error of the fixed TA value does not exceed the maximum round-trip transmission delay difference corresponding to the coverage area of the current cell or the coverage area of the beam.
  • the altitude difference between the base station or satellite and the terminal equipment is generally greater than 500 kilometers, so the terminal equipment in the same cell in the NTN system
  • the round-trip transmission time delay (RTT) is much greater than the round-trip transmission delay of terminal equipment in the same cell in the land communication system (such as NR system), and the round-trip transmission delay difference of the terminal equipment in the same cell in the NTN system is also much greater than that of the land communication system ( For example, the round-trip transmission delay difference of the terminal equipment in the same cell in the NR system).
  • the round-trip transmission delay difference corresponding to the coverage area of the cell or the coverage area of the beam is large (that is, the coverage area of the cell or the coverage area of the beam is large), that is, the fixed TA value and the RRT between the terminal device and the satellite.
  • the fixed TA value and the RRT between the terminal device and the satellite The greater the gap between TA, the greater the error of the total TA pre-compensation value determined by using the fixed TA value above, making the accuracy of the uplink transmission time lower, resulting in uplink out-of-synchronization, which seriously affects the reliability of uplink transmission.
  • FIG. 2a is a schematic diagram of a dual connection scenario provided by an embodiment of the present application.
  • C and D respectively represent the satellite corresponding to the first cell and the satellite corresponding to the second cell, and satellite C and satellite D are in the same satellite orbit, or in different satellite orbits.
  • satellite C and satellite Satellite D is plotted as an example in different satellite orbits.
  • A represents the point closest to satellite C in the coverage area of the first cell;
  • B represents a point in the second cell, which can be the point closest to satellite C in the coverage area of the second cell, or the second cell Any fixed point relative to satellite D within the coverage area of (for example, the point closest to satellite D, which is drawn as an example in Figure 2a).
  • the total TA precompensation value calculated for the above-mentioned fixed TA value configured for the coverage area of the first cell (that is, the RTT between point A and satellite C) is usually used as the uplink transmission TA value.
  • the above-mentioned total TA pre-compensation value calculated by using a fixed TA value as the TA value for uplink transmission has low accuracy, which makes the accuracy of uplink transmission time low, resulting in uplink out-of-synchronization, which seriously affects the uplink transmission of terminal equipment reliability.
  • the above-mentioned method for determining a fixed TA value can refer to FIG. 2b.
  • 203 represents the coverage area of a cell or the coverage area of a beam corresponding to the satellite 201
  • 202 represents the point closest to the satellite 201 in the coverage area, and the distance between this point and the satellite is used as a fixed point in the coverage area.
  • the fixed round-trip transmission delay generated when the signal is transmitted round-trip over the fixed transmission distance is recorded as the fixed TA value corresponding to the coverage area shown in 203 .
  • the terminal device needs to determine the starting position of the random access response window, that is, determine the end position of sending the first message Msg1 and the random access response window The time interval between the starting positions of the random access response window, and monitor the physical downlink control channel (Physical Downlink Control Channel, PDCCH) within the random access response window.
  • PDCCH Physical Downlink Control Channel
  • the terminal device determines the starting position of the random access response window according to the total TA precompensation value and a time amount indicated by the network.
  • the starting position of the random access response window determined by the terminal device is not accurate enough, which further increases the energy consumption or cause the terminal device to fail to receive the random access response message sent by the network, seriously affecting the success rate of UE random access and increasing the delay of UE accessing the network.
  • FIG. 3 is a schematic diagram of interaction of random access provided by an embodiment of the present application.
  • the terminal device firstly completes downlink synchronization by reading the master information block (Master Information Block, MIB) and the first system information block (System Information Block 1, SIB1). By reading SIB1, the terminal device determines resources for sending a preamble (ie the first message Msg1 ) to the network to indicate its intention to access the network. If the network receives Msg1 correctly, the network will send to the terminal device a Random Access Response message (that is, the second message) scrambled with a Random Access-Radio Network Temporary Identifier (RA-RNTI). Msg2). After sending Msg1, the terminal device can use RA-RNTI to monitor Msg2 from the network to descramble the message.
  • RA-RNTI Random Access-Radio Network Temporary Identifier
  • RA-RNTI is calculated through the time and frequency resources of Random Access Channel Occasion (RO).
  • Msg2 may include a TA value, a Temporary Cell-Radio Network Temporary Identifier (Temporary Cell-Radio Network Temporary Identifier, TC-RNTI), power adjustment, and a resource indication for the terminal device to send the third message Msg3.
  • the terminal device sends its identity and initial access setup (i.e. Msg3) to the network through the uplink scheduling indication in Msg2.
  • the network may notify the terminal device of the completion of the initial access process through the fourth message Msg4, otherwise, the terminal device may determine that the initial access process fails.
  • the embodiment of this application provides a A new data transmission method
  • the data transmission method can determine the target TA value used to represent the RTT between the terminal device and the serving satellite by receiving the first TA value sent by the first network device or the second network device, thereby determining the terminal
  • the TA value (that is, the total TA pre-compensation value) for uplink data transmission between the device and the first network device makes the uplink transmission time more accurate and avoids uplink out-of-sync of the terminal device in the Non-GNSS scenario.
  • using the first TA value to determine the initial position of the random access response window can improve the success rate of random access of the terminal device and reduce the time delay for the terminal device to access the network.
  • Figure 4 is a schematic flow chart of a data transmission method provided by the embodiment of the present application, the method includes but is not limited to the following steps:
  • Step 401 the first network device sends the first TA value to the terminal device.
  • the terminal device receives the first TA value sent by the first network device.
  • the first TA value is the cell-level or beam-level TA value indicated by the second cell
  • the cell-level TA value is the round-trip transmission delay value from the satellite corresponding to the first cell to the reference point in the coverage area of the second cell
  • the beam-level TA value is the round-trip transmission delay value from the satellite corresponding to the first cell to the reference point in the coverage area of a beam in the second cell
  • the coverage area of the second cell overlaps with the coverage area of the first cell, specifically
  • the coverage of the first cell may partially overlap with the coverage of the second cell, or the coverage of the first cell may completely include the coverage of the second cell
  • the terminal device may be located between the first cell and the second cell. in the overlapping portion of coverage.
  • the first network device is a network device corresponding to the first cell.
  • the first network device determines the first TA value, and for a specific process, refer to the embodiment shown in FIG. 6 below.
  • the aforementioned reference point may be the closest point within the coverage area of the second cell to the satellite corresponding to the first cell, or may be a point within the coverage area of the second cell relative to the satellite corresponding to the second cell Any fixed point of position, the reference point determined in the embodiment of the present application, can make the accuracy of the first TA value higher.
  • the satellite corresponding to the first cell and the satellite corresponding to the second cell may be on the same satellite orbit, or may be on different satellite orbits.
  • Step 402 The terminal device determines a target TA value according to the first TA value.
  • the target TA value is used to indicate an opportunity to send uplink data to the first network device.
  • Step 402 may be implemented through the following manner 1 or manner 2 during specific implementation.
  • the terminal device determines the received first TA value as the target TA value.
  • the terminal device determines the sum of the second TA value and/or the third TA value, and the above-mentioned received first TA value as the target TA value.
  • the terminal device may use the sum of the second TA value and the first TA value as the target TA value, or use the sum of the third TA value and the first TA value as the target TA value, or use the sum of the second TA value and the first TA value as the target TA value, or use the sum of the The sum of the first TA value, the second TA value and the third TA value is used as the target TA value.
  • the above-mentioned second TA value and third TA value are obtained from the broadcast message corresponding to the first cell
  • the second TA value is a public TA value broadcast by the first cell
  • the third TA value includes the timing issued by the first cell Adjustment value and/or timing offset value.
  • the first TA value is the round-trip transmission delay value from the satellite corresponding to the first cell to the reference point in the coverage area of the second cell.
  • the first TA value is closer to the terminal
  • the round-trip transmission delay between the device and the satellite corresponding to the first cell therefore, the accuracy of the first TA value is higher, and the accuracy of the target TA value determined based on the received first TA value is also higher, so that the determined
  • the accuracy of the TA value of the uplink data transmission between the terminal device and the first network device is also higher, which makes the accuracy of the uplink transmission time higher, avoids the uplink out-of-sync of the terminal device in the Non-GNSS scenario, and greatly improves the uplink transmission of the terminal device. reliability.
  • Step 403 The terminal device performs uplink data transmission with the first network device according to the target TA value.
  • Step 403 may include in specific implementation: the terminal device advances the target TA value, and sends uplink data to the first network device.
  • the terminal device may correspond to the first cell in the first cell or within the beam coverage of the first cell base station for uplink data transmission.
  • the uplink data includes, but is not limited to, random access channel data, or physical uplink shared channel data, or physical uplink control channel data.
  • the terminal device in the embodiment of the present application is a device equipped with a processor that can be used to execute computer-executed instructions.
  • the terminal device can be a mobile phone, a computer, a vehicle, a wearable device, etc., and it can be specifically the terminal in Figure 1 above.
  • the device 102 is configured to receive the first TA value sent by the first network device, determine the target TA value used to represent the RTT between the terminal device and the serving satellite, and then determine the TA value for uplink data transmission between the terminal device and the first network device , avoid uplink out-of-synchronization of terminal equipment in Non-GNSS scenarios, and improve the reliability of uplink transmission of terminal equipment.
  • the first network device in the embodiment of the present application is a different device equipped with a processor that can be used to execute computer-executed instructions.
  • the first network device can be a satellite, a base station or a gateway in a GSM system or a CDMA system, etc. Specifically, it can be The above-mentioned base station in the satellite 101 in FIG. 1 is configured to send the first TA value to the terminal device.
  • the coverage area 504 of the second cell is included in the coverage area 503 of the first cell, and the first cell and the second cell are two cells corresponding to the dual connection establishment of the terminal device.
  • the first cell Or the coverage area of the beam in the first cell is larger, the coverage area of the beam in the second cell or the second cell is smaller, and the satellite 501 corresponding to the first cell and the satellite 502 corresponding to the second cell are on different satellite orbits .
  • the satellite 501 can be a medium orbit earth satellite (medium orbit earth satellite, MEO), a geostationary orbit satellite (geostationary orbit satellite, GEO), etc.
  • the satellite 502 can be a low orbit earth satellite (low orbit earth satellite, LEO), a high-altitude Platform (high altitude platform station, HAPS), etc.
  • the terminal device When the terminal device performs uplink transmission with the first cell within the coverage of the first cell or a beam within the first cell, it may be based on the specific TA value of the cell level or beam level indicated by the first network device in the first cell (that is, the first TA value, line 505 in FIG. 5 ) determines the overall TA precompensation value (ie, the above-mentioned target TA value).
  • the specific TA value of the cell level is the RTT value from the position of the satellite 501 corresponding to the first cell to a reference point in the coverage area of the second cell
  • the specific TA value of the beam level is the RTT value of the satellite 501 corresponding to the first cell
  • the RTT value of the location to a reference point within the coverage area of a beam in the second cell may be the closest point within the coverage area of the second cell (or a beam in the second cell) to the position of the satellite 501 corresponding to the first cell, or it may be the point in the second cell (or a beam in the second cell). Any fixed point within the coverage area of ) relative to the position of the satellite 502 corresponding to the second cell.
  • the method provided in this embodiment also includes:
  • Step 11) The terminal device determines the initial position of the random access response window according to the first TA value. Step 11) and the above steps 402 and/or 403 are executed in no particular order.
  • the terminal device may determine the initial position of the random access response window according to the first TA value when initiating random access to the first cell.
  • Step 11) may include step 11-1) and step 11-2) during specific implementation:
  • Step 11-1) The terminal device determines the second TA value and/or the first delay value, and the sum of the first TA value as the second delay value.
  • the first delay value is an effective delay value of the media access layer control unit of the first cell
  • the second TA value is a public TA value broadcast by the first cell.
  • the second TA value and the first delay value may be obtained through a broadcast message corresponding to the first cell.
  • Step 11-1) in specific implementation may include: the terminal device uses the sum of the second TA value and the above-mentioned first TA value as the second delay value; or, the terminal device uses the first delay value and the above-mentioned first TA value The sum of the values is used as the second delay value; or, the terminal device uses the sum of the second TA value, the first delay value, and the first TA value as the second delay value.
  • Step 11-2) The terminal device determines the start position of the random access response window according to the end position of sending the first message Msg1 to the first cell and the second delay value determined above.
  • the terminal device After determining the initial position of the random access response window, at the initial position of the random access response window, the terminal device starts to monitor the random access response window, and can accurately receive the random access response message, improving the terminal The success rate of device random access and reduce the delay of terminal device access to the network.
  • the initial position of the random access response window can be determined more accurately, so that the monitoring of the random access response window can be started more accurately.
  • FIG. 6 is an implementation process for the first network device to determine the first TA value provided by the embodiment of the present application, specifically including:
  • Step 601 The second network device sends the location information of the coverage area of the second cell to the first network device.
  • the first network device receives the location information of the coverage area of the second cell sent by the second network device.
  • the second network device is a network device corresponding to the second cell.
  • the base station of the second cell needs to exchange information with the base station of the first cell (that is, the first network device), that is, the base station of the second cell needs to pass the Xn interstellar link (Inter-Satellite Link, ISL) notifies the base station of the first cell that the terminal device is within the coverage area of the second cell, or that the terminal device is within the coverage area of a beam in the second cell.
  • ISL Inter-Satellite Link
  • Step 602 The first network device determines the first TA value according to the location information of the coverage area of the second cell and the location information of the satellite corresponding to the first cell.
  • the target TA used to represent the RTT between the terminal device and the serving satellite can be determined value, so as to determine the TA value of the uplink data transmission between the terminal device and the first network device, so that the accuracy of the uplink transmission time is high, avoiding the out-of-sync uplink of the terminal device in the Non-GNSS scenario, and greatly improving the uplink transmission of the terminal device reliability.
  • Figure 7a is a schematic flowchart of another data transmission method provided by the embodiment of the present application, the method includes but is not limited to the following steps:
  • Step 701 The second network device sends the first TA value to the terminal device.
  • the terminal device receives the first TA value sent by the second network device.
  • the relevant descriptions about the first network device, the second network device, the terminal device, the first cell, the second cell, the first TA value, and the reference point can be referred to above, and will not be repeated here.
  • the second network device sends the first TA value to the terminal device under the following circumstances:
  • the second network device may deliver the first TA value at the cell level to the terminal device through system information.
  • the terminal device determines the first TA value at the cell level by receiving the system message delivered by the second cell.
  • the second network device can send the first TA value corresponding to each beam in the second cell to the terminal device through system information (that is, the reference point in the coverage area of each beam in the second cell corresponds to the first TA value in the first cell).
  • system information that is, the reference point in the coverage area of each beam in the second cell corresponds to the first TA value in the first cell.
  • the RTT value between satellite positions the terminal device determines the first TA value corresponding to each beam in the cell by receiving the system message delivered by the second cell.
  • Case 2 When establishing a radio resource control connection with the terminal device, that is, for the case where the second cell is in the connected state:
  • the second network device can send the first TA value at the cell level to the terminal device through system information, RRC signaling or Media Access Control Element (MAC CE), and the terminal device receives the second TA value.
  • the system information, RRC signaling or MAC CE signaling issued by the cell determines the first TA value of the cell level.
  • the second network device can send the first TA value corresponding to each beam in the second cell to the terminal device through system information, RRC signaling or MAC CE signaling (that is, the coverage of each beam in the second cell The RTT value between the reference point in the area and the satellite position corresponding to the first cell), the terminal device determines the corresponding beam of each beam in the cell by receiving the system information, RRC signaling or MAC CE signaling issued by the second cell first TA value.
  • the method further includes:
  • the second network device determines the first TA value according to the location information of the coverage area of the second cell and the location information of the satellite corresponding to the first cell.
  • the satellite corresponding to the first cell and the satellite corresponding to the second cell may be on the same satellite orbit, or may be on different satellite orbits.
  • Step 702 The terminal device determines a target TA value according to the first TA value.
  • step 702 For the related description of step 702, refer to the above step 402.
  • the method of the embodiment of the present application also includes:
  • Step 703 The terminal device performs uplink data transmission with the first network device according to the target TA value.
  • step 703 For the relevant description of step 703, reference may be made to step 403 above.
  • the terminal device when the terminal device performs uplink transmission with the first cell within the coverage of the first cell or the beam in the first cell, it can be based on the specific TA at the cell level or beam level indicated by the second network device in the second cell value (ie, the first TA value) determines the overall TA precompensation value (ie, the aforementioned target TA value).
  • the specific TA value of the cell level is the RTT value from the position of the satellite 501 corresponding to the first cell to a reference point in the coverage area of the second cell
  • the specific TA value of the beam level is the RTT value of the satellite 501 corresponding to the first cell
  • the RTT value of the location to a reference point within the coverage area of a beam in the second cell may be the closest point within the coverage area of the second cell (or a beam in the second cell) to the position of the satellite 501 corresponding to the first cell, or it may be the point in the second cell (or a beam in the second cell). Any fixed point within the coverage area of ) relative to the position of the satellite 502 corresponding to the second cell.
  • this embodiment also includes the above step 11-1) and step 11-2).
  • the target TA used to represent the RTT between the terminal device and the serving satellite can be determined value, so as to determine the TA value of the uplink data transmission between the terminal device and the first network device, so that the accuracy of the uplink transmission time is high, avoiding the out-of-sync uplink of the terminal device in the Non-GNSS scenario, and greatly improving the uplink transmission of the terminal device reliability.
  • FIG. 8 is a schematic structural diagram of a data transmission device provided in an embodiment of the present application.
  • the data transmission device 80 may include a receiving unit 801, a determination unit 802, and a transmission unit 803, wherein the description of each unit is as follows:
  • the receiving unit 801 is configured to receive a first TA value sent by a first network device or a second network device; the first network device is a network device corresponding to the first cell, and the second network device is a network device corresponding to the second cell A network device, where the coverage area of the second cell overlaps with the coverage area of the first cell, and the first TA value is a reference point from a satellite corresponding to the first cell to the coverage area of the second cell The round-trip transmission delay value;
  • a determining unit 802 configured to determine a target TA value according to the first TA value
  • the transmission unit 803 is configured to perform uplink data transmission with the first network device according to the target TA value.
  • the device also includes:
  • the determining unit 802 is further configured to determine a starting position of a random access response window according to the first TA value when initiating random access to the first cell;
  • the monitoring unit 804 is configured to start monitoring the random access response window at the starting position of the random access response window.
  • each unit in the device shown in FIG. 8 can be separately or all combined into one or several other units to form, or one (some) units can be further divided into more functional units. It is composed of multiple small units, which can achieve the same operation without affecting the realization of the technical effects of the embodiments of the present application.
  • the above units are divided based on logical functions. In practical applications, the functions of one unit can also be realized by multiple units, or the functions of multiple units can be realized by one unit. In other embodiments of the present application, the network-based device may also include other units. In practical applications, these functions may also be assisted by other units, and may be implemented cooperatively by multiple units.
  • the data transmission device may be the terminal device shown above or a chip in the terminal device or the like. That is, the data transmission apparatus may be used to perform the steps or functions performed by the terminal device in the above method embodiments.
  • the target TA value used to represent the RTT between the terminal device and the serving satellite can be determined, thereby determining
  • the TA value of the uplink data transmission between the terminal device and the first network device makes the uplink transmission time more accurate, avoids the uplink out-of-sync of the terminal device in the Non-GNSS scenario, and greatly improves the reliability of the uplink transmission of the terminal device.
  • each processing unit may correspond to one or more processors, wherein the receiving unit 801 may correspond to a receiver, and the transmitting unit 803 may correspond to a generation device, the receiving unit 801 and the transmitting unit 803 may also be integrated into one device, such as a transceiver.
  • the processor and the transceiver may be coupled, etc.
  • the coupling in the embodiment of the present application is an indirect coupling or communication connection between devices, units or modules, which may be in electrical, mechanical or other forms. Information exchange between devices, units or modules.
  • the embodiment of the present application does not limit the connection manner between the processor and the transceiver.
  • FIG. 9 is a schematic structural diagram of another data transmission device provided by the embodiment of the present application.
  • the data transmission device 90 may include a receiving unit 901, a determining unit 902, and a sending unit 903, wherein the description of each unit is as follows :
  • the receiving unit 901 is configured to receive the location information of the coverage area of the second cell sent by the second network device;
  • the data transmission device is a device corresponding to the first cell, and the second network device is a device corresponding to the second cell A network device, the coverage area of the second cell overlaps with the coverage area of the first cell;
  • the determining unit 902 is configured to determine a first TA value according to the location information of the coverage area of the second cell and the location information of the satellite corresponding to the first cell; the first TA value corresponds to the first cell The round-trip transmission delay value of the satellite to the reference point in the coverage area of the second cell;
  • the sending unit 903 is configured to send the first TA value to the terminal device.
  • each unit in the device shown in FIG. 9 can be separately or all combined into one or several other units to form, or one (some) units can be further divided into functionally more It is composed of multiple small units, which can achieve the same operation without affecting the realization of the technical effects of the embodiments of the present application.
  • the above-mentioned units are divided based on logical functions. In practical applications, the functions of one unit may also be realized by multiple units, or the functions of multiple units may be realized by one unit. In other embodiments of the present application, the network-based device may also include other units, and in practical applications, these functions may also be assisted by other units, and may be implemented cooperatively by multiple units.
  • the data transmission device may be the first network device shown above or a chip in the first network device or the like. That is, the data transmission apparatus may be used to perform the steps or functions performed by the first network device in the above method embodiments.
  • the target TA value used to represent the RTT between the terminal device and the serving satellite can be determined, thereby determining
  • the TA value of the uplink data transmission between the terminal device and the first network device makes the uplink transmission time more accurate, avoids the uplink out-of-sync of the terminal device in the Non-GNSS scenario, and greatly improves the reliability of the uplink transmission of the terminal device.
  • each processing unit may correspond to one or more processors, wherein the receiving unit 901 may correspond to a receiver, and the sending unit 903 may correspond to a generation device, the receiving unit 901 and the sending unit 903 may also be integrated into one device, such as a transceiver.
  • the processor and the transceiver may be coupled, etc.
  • the coupling in the embodiment of the present application is an indirect coupling or communication connection between devices, units or modules, which may be in electrical, mechanical or other forms. Information exchange between devices, units or modules.
  • the embodiment of the present application does not limit the connection manner between the processor and the transceiver.
  • FIG. 10 is a schematic structural diagram of another data transmission device provided by the embodiment of the present application.
  • the data transmission device 100 may include a determination unit 1001 and a sending unit 1002, where each unit is described as follows:
  • a determining unit 1001 configured to determine a first TA value according to the location information of the coverage area of the second cell and the location information of the satellite corresponding to the first cell;
  • a sending unit 1002 configured to send the first TA value to a terminal device;
  • the data transmission device is a device corresponding to the second cell, and the first TA value is sent from the satellite corresponding to the first cell to the A round-trip transmission delay value of a reference point within a coverage area of a second cell, where the coverage area of the second cell overlaps with the coverage area of the first cell;
  • the sending unit 1002 is configured to send the location information of the coverage area of the second cell to the first network device; the first network device is the network device corresponding to the first cell, and the data transmission device is the first network device The device corresponding to the second cell, the location information of the coverage area of the second cell is used to determine a first TA value, and the first TA value is within the coverage area of the second cell from the satellite corresponding to the first cell The round-trip transmission delay value of the reference point of , the coverage area of the second cell overlaps with the coverage area of the first cell.
  • each unit in the device shown in Fig. 10 can be respectively or all combined into one or several other units to form, or one (some) units can be further divided into functionally more It is composed of multiple small units, which can achieve the same operation without affecting the realization of the technical effects of the embodiments of the present application.
  • the above units are divided based on logical functions.
  • the functions of one unit can also be realized by multiple units, or the functions of multiple units can be realized by one unit.
  • the network-based device may also include other units. In practical applications, these functions may also be assisted by other units, and may be implemented cooperatively by multiple units.
  • the data transmission device may be the second network device shown above or a chip in the second network device or the like. That is, the data transmission apparatus may be used to perform the steps or functions performed by the second network device in the above method embodiments.
  • the target TA value used to represent the RTT between the terminal device and the serving satellite can be determined, thereby determining
  • the TA value of the uplink data transmission between the terminal device and the first network device makes the uplink transmission time more accurate, avoids the uplink out-of-sync of the terminal device in the Non-GNSS scenario, and greatly improves the reliability of the uplink transmission of the terminal device.
  • each processing unit may correspond to one or more processors, wherein the sending unit 1002 may correspond to a generator, and may also be integrated into a transceiver middle.
  • the processor and the transceiver may be coupled, etc.
  • the coupling in the embodiment of the present application is an indirect coupling or communication connection between devices, units or modules, which may be in electrical, mechanical or other forms. Information exchange between devices, units or modules.
  • the embodiment of the present application does not limit the connection manner between the processor and the transceiver.
  • FIG. 11 is a schematic structural diagram of a communication device 110 provided in an embodiment of the present application.
  • the communication device 110 may include a memory 1101 and a processor 1102 . Further optionally, a communication interface 1103 and a bus 1104 may also be included, wherein the memory 1101 , the processor 1102 and the communication interface 1103 are connected to each other through the bus 1104 .
  • the communication interface 1103 is used for data interaction with the data transmission device 80 or the data transmission device 90 or the data transmission device 100 .
  • a specific connection medium among the communication interface 1103, the processor 1102, and the memory 1101 is not limited.
  • the memory 1101, the processor 1102, and the communication interface 1103 are connected through the bus 1104.
  • the bus is marked with a number in FIG. 11, and the connection mode between other components is only for schematic illustration. , is not limited.
  • the bus can be divided into address bus, data bus, control bus and so on. For ease of representation, only one line is used in FIG. 11 , but it does not mean that there is only one bus or one type of bus.
  • the memory 1101 is used to provide a storage space, in which data such as operating systems and computer programs can be stored.
  • Memory 1101 includes, but is not limited to, random access memory (random access memory, RAM), read-only memory (read-only memory, ROM), erasable programmable read-only memory (erasable programmable read only memory, EPROM), or Portable read-only memory (compact disc read-only memory, CD-ROM).
  • RAM random access memory
  • ROM read-only memory
  • EPROM erasable programmable read only memory
  • Portable read-only memory compact disc read-only memory, CD-ROM.
  • the memory in the embodiment of the present application may also be a circuit or any other device capable of implementing a storage function, and is used for storing program instructions and/or data.
  • the processor 1102 is a module for performing arithmetic operations and logical operations, and may be in a processing module such as a central processing unit (central processing unit, CPU), a graphics processing unit (graphics processing unit, GPU) or a microprocessor (microprocessor unit, MPU). one or a combination of more.
  • the processor can implement or execute the methods, steps and logic block diagrams disclosed in the embodiments of the present application, and the steps of the method disclosed in the embodiments of the present application can be directly embodied as a hardware processor to execute and complete, or use the hardware in the processor to And software module combination execution is completed, etc.
  • a computer program is stored in the memory 1101, and the processor 1102 calls the computer program stored in the memory 1101 to execute the data transmission method shown in FIG. 4 above:
  • the first network device is a network device corresponding to a first cell
  • the second network device is a network device corresponding to a second cell
  • the first network device is a network device corresponding to a second cell.
  • the coverage area of the second cell overlaps with the coverage area of the first cell
  • the first TA value is a round-trip transmission delay value from a satellite corresponding to the first cell to a reference point in the coverage area of the second cell ;
  • the processor 1102 calls the computer program stored in the memory 1101, which can also be used to execute the method steps performed by the various units in the data transmission device 80 shown in FIG. I won't repeat them here.
  • a computer program is stored in the memory 1101, and the processor 1102 calls the computer program stored in the memory 1101 to execute the data transmission method shown in FIG. 6 above:
  • the first network device is a network device corresponding to the first cell
  • the second network device is a network device corresponding to the second cell, so The coverage area of the second cell overlaps with the coverage area of the first cell
  • the first TA value is from the satellite corresponding to the first cell to the first cell
  • the processor 1102 invokes the computer program stored in the memory 1101, which can also be used to execute the method steps performed by the various units in the data transmission device 90 shown in FIG. I won't repeat them here.
  • a computer program is stored in the memory 1101, and the processor 1102 invokes the computer program stored in the memory 1101 to execute the data transmission method shown in FIG. 7a above:
  • the second network device is the second The network device corresponding to the cell
  • the first TA value is the round-trip transmission delay value from the satellite corresponding to the first cell to the reference point in the coverage area of the second cell
  • the coverage area of the second cell is the same as The coverage areas of the first cell overlap
  • the first network device is a network device corresponding to the first cell
  • the second network device is a network device corresponding to the second cell
  • the location information of the coverage area of the second cell is used to determine a first TA value
  • the first TA value is a round-trip transmission from a satellite corresponding to the first cell to a reference point in the coverage area of the second cell Delay value, the coverage area of the second cell overlaps with the coverage area of the first cell.
  • the specific content of the method executed by the processor 1102 may refer to the above-mentioned FIG. 7a , which will not be repeated here.
  • the processor 1102 invokes the computer program stored in the memory 1101, which can also be used to execute the method steps performed by each unit in the data transmission device 100 shown in FIG. I won't repeat them here.
  • the target TA value used to represent the RTT between the terminal device and the serving satellite can be determined, thereby determining the terminal.
  • the TA value of the uplink data transmission between the device and the first network device makes the uplink transmission time more accurate, avoids the uplink out-of-sync of the terminal device in the Non-GNSS scenario, and greatly improves the reliability of the uplink transmission of the terminal device.
  • the communication device shown in the embodiment of the present application may have more components than those shown in FIG. 11 , which is not limited in the embodiment of the present application.
  • the method performed by the processor shown above is only an example, and for the specific steps performed by the processor, reference may be made to the method introduced above.
  • FIG. 12 is a schematic structural diagram of a communication device provided by an embodiment of the present application.
  • the communication device includes a logic circuit 1201 and an interface 1202 .
  • the logic circuit 1201 may be a chip, a processing circuit, an integrated circuit or a system on chip (SoC) chip, etc.
  • the interface 1202 may be a communication interface, an input/output interface, or a pin.
  • FIG. 12 shows that the aforementioned communication device is a chip as an example, and the chip includes a logic circuit 1201 and an interface 1202 .
  • the logic circuit and the interface may also be coupled to each other.
  • the embodiment of the present application does not limit the specific connection manner of the logic circuit and the interface.
  • the communication device shown in the embodiment of the present application may implement the method provided in the embodiment of the present application in the form of hardware, or may implement the method provided in the embodiment of the present application in the form of software, which is not limited in the embodiment of the present application.
  • the embodiment of the present application also provides a computer-readable storage medium, in which a computer program is stored in the above-mentioned computer-readable storage medium, and when the above-mentioned computer program is run on one or more processors, the above-mentioned Figure 4, Figure 6, The method shown in Figure 7a.
  • An embodiment of the present application further provides a computer program product, the computer program product includes a computer program, and when the computer program product is run on a processor, the methods shown in FIG. 4 , FIG. 6 , and FIG. 7a can be implemented.
  • the embodiment of the present application also provides a chip, the chip includes a processor, and the processor is configured to execute instructions, and when the processor executes the instructions, the above methods shown in FIG. 4 , FIG. 6 , and FIG. 7a can be implemented.
  • the chip also includes a communication interface, which is used for inputting signals or outputting signals.
  • the embodiment of the present application also provides a system, which includes at least one communication device or chip such as the above-mentioned data transmission device 80 or data transmission device 90 or data transmission device 100 or communication device 110 or FIG. 12 .
  • the disclosed systems, devices and methods may be implemented in other ways.
  • the device embodiments described above are only illustrative.
  • the division of the units is only a logical function division. In actual implementation, there may be other division methods.
  • multiple units or components can be combined or May be integrated into another system, or some features may be ignored, or not implemented.
  • the mutual coupling or direct coupling or communication connection shown or discussed may be indirect coupling or communication connection through some interfaces, devices or units, and may also be electrical, mechanical or other forms of connection.
  • the units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place, or may be distributed to multiple network units. Part or all of the units can be selected according to actual needs to realize the technical effects of the solutions provided by the embodiments of the present application.
  • each functional unit in each embodiment of the present application may be integrated into one processing unit, each unit may exist separately physically, or two or more units may be integrated into one unit.
  • the above-mentioned integrated units can be implemented in the form of hardware or in the form of software functional units.
  • the integrated unit is realized in the form of a software function unit and sold or used as an independent product, it can be stored in a computer-readable storage medium.
  • the storage medium includes several instructions to enable a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present application.
  • the aforementioned readable storage media include: U disk, mobile hard disk, read-only memory (ROM), random access memory (random access memory, RAM), magnetic disk or optical disk, etc., which can store program codes. medium.

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

Abstract

La présente demande se rapporte au domaine technique des communications sans fil. Sont divulgués un procédé de transmission de données et un appareil associé. Le procédé consiste à : recevoir une première valeur d'avance temporelle (TA) envoyée par un premier dispositif de réseau ou un second dispositif de réseau ; déterminer une valeur d'avance temporelle cible en fonction de la première valeur d'avance temporelle ; et réaliser une transmission de données de liaison montante avec le premier dispositif de réseau en fonction de la valeur d'avance temporelle cible. Le premier dispositif de réseau est un dispositif de réseau correspondant à une première cellule, le second dispositif de réseau est un dispositif de réseau correspondant à une seconde cellule, une zone de couverture de la seconde cellule chevauche une zone de couverture de la première cellule, et la première valeur d'avance temporelle est une valeur de retard de transmission aller-retour d'un satellite correspondant à la première cellule à un point de référence dans la zone de couverture de la seconde cellule. Selon le présent procédé, la précision du temps d'envoi de liaison montante est plus élevée, la désynchronisation de liaison montante d'un dispositif terminal dans un scénario autre que GNSS est évitée, et la fiabilité de la transmission de liaison montante du dispositif terminal est considérablement améliorée.
PCT/CN2022/111954 2021-08-17 2022-08-12 Procédé de transmission de données et appareil associé Ceased WO2023020367A1 (fr)

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