WO2023020367A1 - Data transmission method and related apparatus - Google Patents

Abstract

The present application relates to the technical field of wireless communications. Disclosed are a data transmission method and a related apparatus. The method comprises: receiving a first timing advance value sent by a first network device or a second network device; determining a target timing advance value according to the first timing advance value; and performing uplink data transmission with the first network device according to the target timing advance value. 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, a coverage area of the second cell overlaps a coverage area of the first cell, and the first timing advance 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. According to the present method, the accuracy of the uplink sending time is higher, the uplink out-of-synchronization of a terminal device in a non-GNSS scenario is avoided, and the reliability of uplink transmission of the terminal device is greatly improved.

Description

A data transmission method and related device technical field

The present application relates to the technical field of wireless communication, and in particular to a data transmission method and a related device.

Background technique

In the current non-terrestrial networks (NTN), it is assumed that 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. Calculate the round-trip time delay (round-trip time, RTT) between the terminal device and the serving satellite based on the location information of the terminal device, and then determine the timing advance (timing advance, TA) value of the terminal device’s uplink transmission (that is, the total TA value of the terminal device precompensation value) to complete the uplink transmission of the terminal equipment.

However, in the Non-GNSS scenario, 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.

Contents of the invention

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.

In the first aspect, the embodiment of the present application provides a data transmission method applied to a terminal device, and the method includes:

receiving 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 a first cell, the second network device is a network device corresponding to a second cell, and 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, and 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 ;

determining a target TA value according to the first TA value;

Perform uplink data transmission with the first network device according to the target TA value.

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. Wherein, 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, and 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. Specifically, 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. Through this embodiment of the present application, based on the received first TA value sent by the first network device or the second network device, the target TA value used to represent the RTT between the terminal device and the serving satellite can be determined, so as to determine the relationship between the terminal device and the first TA value. 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.

In a possible implementation manner, 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.

In this possible implementation manner, 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. Specifically, 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. Through the embodiment of the present application, 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.

In a possible implementation manner, the receiving the first TA value sent by the second network device includes:

When no radio resource control connection is established with the second cell, receive a broadcast message sent by the second network device, and acquire the first TA value; or,

In the case of establishing a radio resource control connection with the second cell, receiving a broadcast message or radio resource control signaling or media access layer control signaling sent by the second network device, and acquiring the first TA value.

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.

In a possible implementation manner, the determining the target TA value according to the first TA value includes:

using the first TA value as the target TA value;

Alternatively, 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. Alternatively, 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. Optionally, 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, and the third TA value includes the timing issued by the first cell Adjustment value and/or timing offset value. Through the embodiment of the present application, the accuracy of the target TA value determined based on the received first TA value is relatively high, so that the total TA pre-compensation value determined by the terminal device and the first network device for uplink data transmission has a higher accuracy , so that the accuracy of the uplink transmission time is higher, avoiding the uplink out-of-synchronization of the terminal device in the Non-GNSS scenario, and greatly improving the reliability of the uplink transmission of the terminal device.

In a possible implementation manner, the performing uplink data transmission with the first network device according to the target TA value includes:

Sending uplink data to the first network device in advance of the target TA value; the uplink data includes physical random access channel data, or physical uplink shared channel data, or physical uplink control channel data.

In a possible implementation manner, 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.

In a possible implementation manner, 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.

In a possible implementation manner, the method also includes:

In the case of initiating random access to the first cell, determine a starting position of a random access response window according to the first TA value;

At the initial position of the random access response window, start monitoring the random access response window.

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. Through the embodiment of the present application, 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.

In a possible implementation manner, 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;

Determine 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.

In the embodiment of this application, 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. Specifically, 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; Send the end position of the first message Msg1 and the above-determined second delay value to determine the start position of the random access response window. Specifically, 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. Through the embodiment of the present application, 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.

In a second aspect, the embodiment of the present application provides a data transmission method applied to a first network device, and the method includes:

receiving the location information of the coverage area of the second cell sent by the 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, so The coverage area of the second cell overlaps with the coverage area of the first cell;

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 from the satellite corresponding to the first cell to the first cell The round-trip transmission delay value of the reference point in the coverage area of the second cell;

Send the first TA value to the terminal device.

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. Wherein, 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, and 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. Specifically, the first cell and the second cell may intersect but not overlap, or the second cell may include For the first cell, 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. Through the embodiment of the present application, based on the first TA value determined based on 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 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.

In a possible implementation manner, the sending the first TA value to the terminal device includes:

sending 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.

In a possible implementation manner, 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.

In a possible implementation manner, 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.

In a third aspect, the embodiment of the present application provides a data transmission method, which is applied to a second network device, and the method includes:

According to the position information of the coverage area of the second cell and the position information of the satellite corresponding to the first cell, determine the first TA value, and send the first TA value to the terminal device; 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, and the coverage area of the second cell is the same as The coverage areas of the first cell overlap;

Or, sending the location information of the coverage area of the second cell to the first 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, 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 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. Specifically, 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. Wherein, 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, and 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. Specifically, the first cell and the second cell may intersect but not overlap, or the second cell may include For the first cell, 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. Through the embodiment of the present application, based on the first TA value determined based on 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 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.

In a possible implementation manner, the sending the first TA value to the terminal device includes:

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,

In the case of establishing a radio resource control connection with the terminal device, sending a broadcast message or sending radio resource control signaling to the terminal device or sending media access layer control signaling to the terminal device; 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.

In a possible implementation manner, 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.

In a possible implementation manner, 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.

In a fourth aspect, 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.

In a possible implementation manner, 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.

In a possible implementation manner, 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.

In a possible implementation manner, the determining unit is specifically configured to use the first TA value as the target TA value;

Or, 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, and the third TA value includes a timing adjustment value issued by the first cell and/or timing offset values.

In a possible implementation manner, 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.

In a possible implementation manner, 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.

In a possible implementation manner, 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.

In a possible implementation manner, 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.

In a possible implementation manner, 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.

Regarding the technical effects brought about by the fourth aspect or various possible implementation manners, reference may be made to the introduction corresponding to the technical effects of the first aspect or corresponding implementation manners.

In a fifth aspect, 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.

In a possible implementation manner, 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.

In a possible implementation manner, 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.

In a possible implementation manner, 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.

Regarding the technical effects brought by the fifth aspect or various possible implementation manners, reference may be made to the introduction of the technical effects corresponding to the second aspect or corresponding implementation manners.

In a sixth aspect, 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 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;

Alternatively, 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.

In a possible implementation manner, 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.

In a possible implementation manner, 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.

In a possible implementation manner, 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.

Regarding the technical effect brought about by the sixth aspect or various possible implementation manners, reference may be made to the introduction corresponding to the technical effect of the third aspect or corresponding implementation manners.

In a seventh aspect, 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. Optionally, the communication device further includes a transceiver, configured to receive signals or send signals.

In the eighth aspect, 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.

In the ninth aspect, 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.

In the tenth aspect, 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.

In the eleventh aspect, the embodiment of the present application provides a chip, the chip includes a processor, the processor is used to execute instructions, and when the processor executes the 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. Optionally, the chip further includes a communication interface, and the communication interface is used for receiving signals or sending signals.

In the twelfth aspect, 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 device, the communication device according to the seventh aspect, the communication device according to the eighth aspect, and the chip according to the eleventh aspect.

In addition, in the process of executing the method described in the above aspects and any possible implementation, 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. When outputting 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. Similarly, when the processor receives input information, the transceiver (or communication interface, or sending module) receives the information and inputs it to the processor. Furthermore, after the transceiver receives the information, the information may require other processing before being input to the processor.

Based on the above principles, for example, the sending information mentioned in the foregoing method can be understood as the processor outputting information. For another example, receiving information may be understood as the processor receiving input information.

Optionally, for operations such as transmitting, sending, and receiving involved in the processor, if there is no special description, or if it does not conflict with its actual function or internal logic in the relevant description, it can be understood more generally as Processor output and receive, input and other operations.

Optionally, during the process of executing the methods described in the above aspects and any possible implementation manner, 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. The embodiment does not limit the type of the memory and the arrangement of the memory and the processor.

In a possible implementation manner, the above at least one memory is located outside the device.

In yet another possible implementation manner, the at least one memory is located within the device.

In yet another possible implementation manner, 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.

In this application, the processor and the memory may also be integrated into one device, that is, the processor and the memory may also be integrated together.

Description of drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the accompanying drawings that need to be used in the embodiments of the present application. Obviously, the accompanying drawings described below are only some embodiments of the present application. Those of ordinary skill in the art can also obtain other drawings based on these drawings without making creative efforts.

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.

Detailed ways

In order to make the purpose, technical solution and advantages of the application clearer, the embodiments of the application will be described below in conjunction with the drawings in the embodiments of the application.

The terms "first" and "second" in the specification, claims and drawings of the present application are used to distinguish different objects, rather than to describe a specific order. Furthermore, the terms "comprising" and "having", as well as any variations thereof, are intended to cover a non-exclusive inclusion. For example, a process, method, system, product, or device that includes a series of steps or units is not limited to the listed steps or units, but optionally also includes steps or units that are not listed, or optionally It also includes other steps or units inherent to these processes, methods, products, or devices.

Reference herein to "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.

It should be understood that in this application, "at least one (item)" means one or more, "multiple" means two or more, and "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. For example, 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. In order to describe the solution of this application more clearly, some knowledge related to NTN data transmission will be introduced below.

With the development of information technology, modern communication systems put forward more urgent requirements for communication efficiency, mobility, and diversity. At present, in some important application scenarios, such as space communication, aviation communication, maritime communication, military communication and other fields, satellites play play an irreplaceable role. 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. Moreover, high-altitude platforms or satellites are less affected by natural disasters, which can improve the reliability of 5G systems. In NTN based on satellite deployment, 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 technical solutions provided by the embodiments of the present application can be applied to various communication systems, for example, satellite communication systems, and systems in which satellite communication and cellular networks are integrated. Among them, 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 Interoperability for Microwave Access, WiMAX) communication system, wireless local area network (Wireless Local Area Networks, WLAN), wireless fidelity (Wireless Fidelity, WiFi), next generation communication system or other communication systems, etc. Generally speaking, the number of connections supported by traditional communication systems is limited and easy to implement. However, with the development of communication technology, mobile communication systems will not only support traditional communication, but will also support, for example: Device to Device (Device to Device, D2D) communication, machine to machine (Machine to Machine, M2M) communication, machine type communication (Machine Type Communication, MTC), vehicle to vehicle (Vehicle to Vehicle, V2V) communication and other communication systems that will evolve in the future, etc., the embodiment of this application It can also be applied to these communication systems. 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.

Exemplarily, the following uses the NTN system as an example to provide a specific application scenario of this solution. 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.

Please refer to FIG. 1. Taking a 5G communication system as an example, FIG. 1 is a schematic diagram of an NTN scenario provided by an embodiment of the present application.

As shown in FIG. 1 , 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 . At the same time, there is a wireless link between the satellites to complete signaling interaction and user data transmission between base stations.

The network elements and their interfaces in this scenario are described as follows:

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.

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. 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. 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.

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). Optionally, 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. In addition, 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.

It can be understood that 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. Taking the communication system shown in Figure 1 as an example, 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.

It should also be noted that in this 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.

It can be understood that 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.

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. In a general scenario, the TA value for uplink transmission of the terminal device (that is, the total TA pre-compensation value) = the RTT value between the terminal device and the satellite + the public TA value broadcast by the first cell + the TA value adjustment value indicated by the network. Wherein, 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. 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.

At this time, the network may configure a fixed TA value for the coverage area of each cell or the coverage area of each beam. At this time, the terminal device can calculate the TA value for uplink transmission (that is, the total TA pre-compensation value) according to the fixed TA value. Specifically, the total TA pre-compensation value = fixed TA value + public TA value broadcast by the first cell + TA value adjustment value indicated by the network.

Wherein, 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. Correspondingly, 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. Here, 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, and the round-trip transmission delay of the signal between the terminal device and the satellite and the fixed TA value The difference can be recorded as the round-trip transmission delay difference. 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. In the NTN system, due to the long distance between the terminal equipment and the network equipment, for example, 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). When 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 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.

Currently, a terminal device has a dual connectivity scenario in the NTN system, that is, the terminal device establishes a connection with two cells. In the dual connectivity scenario, the above-mentioned uplink out-of-sync problem also exists, which will be described in detail below. Referring to FIG. 2a, FIG. 2a is a schematic diagram of a dual connection scenario provided by an embodiment of the present application.

As shown in Figure 2a, 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. In Figure 2a, 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). When the terminal device needs to perform uplink transmission with satellite C, 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.

It can be seen that in this scenario, there is a certain error between the fixed TA value and the RTT value between the terminal device and satellite C, because the terminal device is not at point A, but in the second cell. Therefore, 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.

Specifically, the above-mentioned method for determining a fixed TA value can refer to FIG. 2b. As shown in Figure 2b, 203 represents the coverage area of a cell or the coverage area of a beam corresponding to the satellite 201, and 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. For the transmission distance, 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 .

Based on the above description, it can be seen that for the scenarios shown in Figure 2a and Figure 2b, there is a large error in determining the total TA pre-compensation value of the terminal device and satellite C for uplink transmission by using the above-mentioned fixed TA value (when the coverage of the first cell The larger the coverage area of the area or beam, the more obvious the error), that is, there is a large gap between the TA value of the terminal device determined by this method and the TA value that the terminal device should have used, so that the uplink transmission time of the terminal device The accuracy is low, causing uplink out of synchronization, which seriously affects the reliability of uplink transmission.

In addition, during the random access process of the terminal device, after sending the first message Msg1, 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. Currently, 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. In the Non-GNSS scenario, due to the large error in the total TA value compensation value calculated according to the fixed TA value, 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.

For details, refer to FIG. 3 . FIG. 3 is a schematic diagram of interaction of random access provided by an embodiment of the present application.

As shown in Figure 3, 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 is calculated through the time and frequency resources of Random Access Channel Occasion (RO). Wherein, 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. Then, the terminal device sends its identity and initial access setup (i.e. Msg3) to the network through the uplink scheduling indication in Msg2. Finally, 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.

In order to solve the problem of low uplink transmission reliability in the Non-GNSS scenario mentioned above, as well as the problem of low random access success rate and long access delay of terminal equipment, 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. In addition, 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.

Based on any of the above application scenarios, the NTN-based data transmission method provided by this solution will be described in detail below through specific implementation manners.

Please refer to Figure 4, 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. Correspondingly, the terminal device receives the first TA value sent by the first network device.

Wherein, the first TA value is the cell-level or beam-level TA value indicated by the second cell, and 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, and 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.

In a possible implementation manner, before step 401, the first network device determines the first TA value, and for a specific process, refer to the embodiment shown in FIG. 6 below.

In a possible implementation manner, 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.

In a possible implementation manner, 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.

Wherein, 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.

Mode 1. The terminal device determines the received first TA value as the target TA value.

Mode 2. 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.

In the specific implementation of mode 2, 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. Optionally, 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, and the third TA value includes the timing issued by the first cell Adjustment value and/or timing offset value.

In the embodiment of this application, 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. Compared with the above-mentioned fixed TA value, 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. Specifically, 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. Optionally, 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. Through the embodiment of the present application, the reliability of the uplink transmission of the terminal device can be greatly improved.

Among them, 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.

For example, please refer to FIG. 5 , 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 . Among them, the satellite 501 can be a medium orbit earth satellite (medium orbit earth satellite, MEO), a geostationary orbit satellite (geostationary orbit satellite, GEO), etc., and 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.

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). Wherein, 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, and 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. The above-mentioned reference point 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.

Optionally, 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.

Step 11) In specific implementation, 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. Wherein, the first delay value is an effective delay value of the media access layer control unit of the first cell, and the second TA value is a public TA value broadcast by the first cell. Optionally, 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.

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.

Through the embodiment of the present application, 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.

Please refer to FIG. 6. 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. Correspondingly, the first network device receives the location information of the coverage area of the second cell sent by the second network device.

Wherein, the second network device is a network device corresponding to the second cell.

In this embodiment, the base station of the second cell (that is, the second network device) 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.

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.

Through the embodiment of the present application, based on the first TA value determined based on 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.

Please refer to Figure 7a, 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. Correspondingly, the terminal device receives the first TA value sent by the second network device.

Wherein, 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.

Optionally, the second network device sends the first TA value to the terminal device under the following circumstances:

Case 1. When no radio resource control connection is established with the terminal device, that is, for the case where the second cell is in an idle state or an inactive state:

Case 1.1. 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.

Case 1.2. 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). 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:

Case 2.1. 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.

Case 2.2, 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. Optionally, before step 701, 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.

In a possible implementation manner, 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.

For the related description of step 702, refer to the above step 402.

Optionally, 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.

For the relevant description of step 703, reference may be made to step 403 above.

For example, refer to FIG. 7b. The description about the first cell and the second cell in FIG. 7b may refer to FIG. 5, and details are not repeated here. In Figure 7b, 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). Wherein, 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, and 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. The above-mentioned reference point 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.

Optionally, this embodiment also includes the above step 11-1) and step 11-2).

Through the embodiment of the present application, based on the first TA value determined based on 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.

The method of the embodiment of the present application has been described in detail above, and the device of the embodiment of the present application is provided below.

Please refer to FIG. 8. 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.

In a possible implementation manner, 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.

According to the embodiment of the present application, 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.

It should be noted that, for the implementation of each unit, reference may also be made to the corresponding description of the method embodiment shown in FIG. 4 above.

In the embodiment of the present application, 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.

In the data transmission device 80 described in FIG. 8, by receiving the first TA value sent by the first network device or the second network device, 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.

The data transmission device according to the embodiment of the present application has been introduced above, and possible product forms of the data transmission device will be introduced below. It should be understood that any form of product having the functions of the data transmission device described in FIG. 8 above falls within the protection scope of the embodiment of the present application. It should also be understood that the following introduction is only an example, and the product form of the data transmission device in the embodiment of the present application is not limited thereto.

In a possible implementation manner, in the data transmission device shown in FIG. 8 , 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. In the embodiment of the present application, 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.

Please refer to FIG. 9. 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.

According to the embodiment of the present application, 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.

It should be noted that, for the implementation of each unit, reference may also be made to the corresponding description of the method embodiment shown in FIG. 6 above.

In the embodiment of the present application, 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.

In the data transmission device 90 described in FIG. 9, by receiving the first TA value sent by the first network device or the second network device, 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.

The data transmission device according to the embodiment of the present application has been introduced above, and possible product forms of the data transmission device will be introduced below. It should be understood that any product in any form that has the functions of the data transmission device described above in FIG. 9 falls within the protection scope of the embodiment of the present application. It should also be understood that the following introduction is only an example, and the product form of the data transmission device in the embodiment of the present application is not limited thereto.

In a possible implementation, in the data transmission device shown in FIG. 9 , 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. In the embodiment of the present application, 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.

Please refer to FIG. 10. 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;

Alternatively, 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.

According to the embodiment of the present application, 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. 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.

It should be noted that, for the implementation of each unit, reference may also be made to the corresponding description of the method embodiment shown in FIG. 7a above.

In the embodiment of the present application, 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.

In the data transmission apparatus 100 described in FIG. 10, by receiving the first TA value sent by the first network device or the second network device, 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.

The data transmission device according to the embodiment of the present application has been introduced above, and possible product forms of the data transmission device will be introduced below. It should be understood that any form of product that has the functions of the data transmission device described above in FIG. 10 falls within the protection scope of the embodiment of the present application. It should also be understood that the following introduction is only an example, and the product form of the data transmission device in the embodiment of the present application is not limited thereto.

In a possible implementation, in the data transmission device shown in FIG. 10 , 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. In the embodiment of the present application, 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.

Please refer to FIG. 11 . 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 .

In this embodiment of the present application, a specific connection medium among the communication interface 1103, the processor 1102, and the memory 1101 is not limited. In the embodiment of the present application, in FIG. 11, 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.

Wherein, 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). 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:

receiving 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 a first cell, the second network device is a network device corresponding to a second cell, and 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, and 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 ;

determining a target TA value according to the first TA value;

Perform uplink data transmission with the first network device according to the target TA value.

For the specific content of the method executed by the processor 1102, reference may be made to the above-mentioned FIG. 4 , which will not be repeated here.

Correspondingly, 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.

On the other hand, 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:

receiving the location information of the coverage area of the second cell sent by the 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, so The coverage area of the second cell overlaps with the coverage area of the first cell;

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 from the satellite corresponding to the first cell to the first cell The round-trip transmission delay value of the reference point in the coverage area of the second cell;

Send the first TA value to the terminal device.

For the specific content of the method executed by the processor 1102, reference may be made to the above-mentioned FIG. 6 , which will not be repeated here.

Correspondingly, 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.

In yet another aspect, 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:

According to the position information of the coverage area of the second cell and the position information of the satellite corresponding to the first cell, determine the first TA value, and send the first TA value to the terminal device; 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, and the coverage area of the second cell is the same as The coverage areas of the first cell overlap;

Or, sending the location information of the coverage area of the second cell to the first 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, 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 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.

Correspondingly, 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.

In the communication device 110 described in FIG. 11 , by receiving the first TA value sent by the first network device or the second network device, 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.

It can be understood that 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.

Please refer to FIG. 12 . 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 . Wherein, the logic circuit 1201 may be a chip, a processing circuit, an integrated circuit or a system on chip (SoC) chip, etc., and the interface 1202 may be a communication interface, an input/output interface, or a pin. Exemplarily, 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 .

In the embodiment of the present application, 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.

It can be understood that for specific descriptions of logic circuits and interfaces, reference may be made to the device shown in FIG. 11 .

It can be understood that 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.

For the specific implementation manners of the various embodiments shown in FIG. 12 , reference may also be made to the above-mentioned various embodiments, which will not be described in detail here.

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. Optionally, 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 .

In the several embodiments provided in this application, it should be understood that the disclosed systems, devices and methods may be implemented in other ways. For example, the device embodiments described above are only illustrative. For example, the division of the units is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components can be combined or May be integrated into another system, or some features may be ignored, or not implemented. In addition, 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.

In addition, 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.

If 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. Based on this understanding, the technical solution of this application is essentially or part of the contribution to the prior art, or all or part of the technical solution can be embodied in the form of a software product, which is stored in a readable 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.

The above is only a specific implementation of the application, but the scope of protection of the application is not limited thereto. Anyone familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the application. Should be covered within the protection scope of this application. Therefore, the protection scope of the present application should be determined by the protection scope of the claims.

Claims (24)

A data transmission method applied to a terminal device, characterized in that it includes: receiving a first timing advance value sent by a first network device or a second network device; 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, and the The coverage area of the second cell overlaps with the coverage area of the first cell, and the first timing advance value is a round-trip transmission time from a satellite corresponding to the first cell to a reference point in the coverage area of the second cell extension; determining a target timing advance value according to the first timing advance value; Perform uplink data transmission with the first network device according to the target timing advance value. The method according to claim 1, wherein the first timing advance value 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 method according to claim 1 or 2, wherein the receiving the first timing advance value sent by the second network device comprises: When no radio resource control connection is established with the second cell, receive a broadcast message sent by the second network device, and acquire the first timing advance value; or, In the case of establishing a radio resource control connection with the second cell, receiving a broadcast message or radio resource control signaling or media access layer control signaling sent by the second network device, and acquiring the first timing advance value . The method according to any one of claims 1 to 3, wherein the determining the target timing advance value according to the first timing advance value comprises: using the first timing advance value as the target timing advance value; Alternatively, the sum of the second timing advance value and/or the third timing advance value, and the first timing advance value is used as the target timing advance value; the second timing advance value and the third timing advance value Obtained from the broadcast message corresponding to the first cell, the second timing advance value is a public timing advance value broadcast by the first cell, and the third timing advance value includes a timing adjustment issued by the first cell value and/or timing offset value. The method according to any one of claims 1 to 4, wherein the performing uplink data transmission with the first network device according to the target timing advance value comprises: Sending uplink data to the first network device in advance of the target timing advance value; the uplink data includes physical random access channel data, or physical uplink shared channel data, or physical uplink control channel data. The method according to any one of claims 1 to 5, wherein the reference point is the closest point within the coverage area of the second cell to the satellite corresponding to the first cell, or is the Any fixed point within the coverage area of the second cell relative to the satellite position corresponding to the second cell. The method according to any one of claims 1 to 6, wherein 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 according to any one of claims 1 to 7, further comprising: In the case of initiating random access to the first cell, determine a starting position of a random access response window according to the first timing advance value; At the initial position of the random access response window, start monitoring the random access response window. The method according to claim 8, wherein the determining the initial position of the random access response window according to the first timing advance value comprises: The sum of the second timing advance value or the first time delay value and the first timing advance value is used as the second time delay value; the second timing advance value and the first time delay value are determined by the first time delay value A broadcast message corresponding to a cell is obtained, the second timing advance value is a public timing advance value broadcast by the first cell, and the first delay value is when the media access layer control unit of the first cell takes effect extension; Determine 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. A data transmission method applied to a first network device, characterized in that it comprises: receiving the location information of the coverage area of the second cell sent by the 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, so The coverage area of the second cell overlaps with the coverage area of the first cell; 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, determine a first timing advance value; the first timing advance value is from the satellite corresponding to the first cell to the satellite corresponding to the first cell. The round-trip transmission delay value of the reference point in the coverage area of the second cell; Sending the first timing advance value to the terminal device. The method according to claim 10, wherein the sending the first timing advance value to the terminal device comprises: sending 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 timing to the terminal device advance value. The method according to claim 10 or 11, wherein the reference point is the closest point within the coverage area of the second cell to the satellite corresponding to the first cell, or is the point of the second cell Any fixed point within the coverage area relative to the satellite position corresponding to the second cell. The method according to any one of claims 10 to 12, wherein 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. A data transmission method applied to a second network device, characterized in that it includes: According to the position information of the coverage area of the second cell and the position information of the satellite corresponding to the first cell, determine the first timing advance value, and send the first timing advance value to the terminal device; the second network device is the For the network device corresponding to the second cell, the first timing advance value is a round-trip transmission delay value from the satellite corresponding to the first cell to a reference point in the coverage area of the second cell, and the second cell’s The coverage area overlaps with the coverage area of the first cell; Or, sending the location information of the coverage area of the second cell to the first 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, The position information of the coverage area of the second cell is used to determine a first timing advance value, and the first timing advance value is a distance from a satellite corresponding to the first cell to a reference point in the coverage area of the second cell For the round-trip transmission delay value, the coverage area of the second cell overlaps with the coverage area of the first cell. The method according to claim 14, wherein the sending the first timing advance value to the terminal device comprises: 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 timing advance value; or, In the case of establishing a radio resource control connection with the terminal device, sending a broadcast message or sending radio resource control signaling to the terminal device or sending media access layer control signaling to the terminal device; the broadcast message or The radio resource control signaling or the medium access layer control signaling is used to indicate the first timing advance value. The method according to claim 14 or 15, wherein the reference point is the closest point within the coverage area of the second cell to the satellite corresponding to the first cell, or is the point of the second cell Any fixed point within the coverage area relative to the satellite position corresponding to the second cell. The method according to any one of claims 14 to 16, wherein 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. A data transmission device, characterized in that it comprises: The receiving unit is configured to receive the first timing advance 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 device corresponding to the second cell Network equipment, the coverage area of the second cell overlaps with the coverage area of the first cell, and the first timing advance value is a reference from the satellite corresponding to the first cell to the coverage area of the second cell The round-trip transmission delay value of the point; a determining unit, configured to determine a target timing advance value according to the first timing advance value; A transmission unit, configured to perform uplink data transmission with the first network device according to the target timing advance value. A data transmission device, characterized in that it comprises: 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 timing advance value according to the position information of the coverage area of the second cell and the position information of the satellite corresponding to the first cell; the first timing advance value is the first cell a round-trip transmission delay value from the corresponding satellite to the reference point within the coverage area of the second cell; A sending unit, configured to send the first timing advance value to the terminal device. A data transmission device, characterized in that it comprises: The determining unit is configured to determine a first timing advance value according to the position information of the coverage area of the second cell and the position information of the satellite corresponding to the first cell; the sending unit is configured to send the first timing advance value to the terminal device; The data transmission device is a device corresponding to the second cell, and the first timing advance 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 coverage area of the second cell overlaps with the coverage area of the first cell; Alternatively, 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 a network device corresponding to the first cell, and the location of the coverage area of the second cell The information is used to determine a first timing advance value, where the first timing advance 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 second The coverage area of the cell overlaps with the coverage area of the first cell. A communication device, characterized by comprising: a processor and a memory; The memory is used to store computer-executable instructions; The processor is configured to execute the computer-executed instructions stored in the memory, so that the communication device executes the method according to any one of claims 1 to 9, or makes the communication device execute the method according to claim 10 The method described in any one of claims 13 to 13, or causing the communication device to execute the method described in any one of claims 14 to 17. A communication device, characterized by comprising: a logic circuit and an interface; the logic circuit is coupled to the interface; The interface is used for inputting and/or outputting code instructions, and the logic circuit is used for executing the code instructions, so that the method described in any one of claims 1 to 9 is executed, or, making claims 10 to The method described in any one of claims 13 is carried out, or the method described in any one of claims 14 to 17 is carried out. A computer-readable storage medium, comprising: The computer-readable storage medium is used to store instructions or computer programs; when the instructions or the computer programs are executed, the method as described in any one of claims 1 to 9 is implemented, or, as A method as claimed in any one of claims 10 to 13 is carried out, or a method as claimed in any one of claims 14 to 17 is caused to be carried out. A computer program product, characterized in that it includes: instructions or computer programs; When the instruction or the computer program is executed, the method according to any one of claims 1 to 9 is realized, or, the method according to any one of claims 10 to 13 is realized, Alternatively, a method as claimed in any one of claims 14 to 17 is caused to be implemented.

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