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CN-122002520-A - Method for acquiring Timing Advance (TA) and related device

CN122002520ACN 122002520 ACN122002520 ACN 122002520ACN-122002520-A

Abstract

The application provides a method for acquiring timing advance TA and a related device, which are applied to a terminal, wherein the terminal is in communication with a satellite in a first channel, and the method comprises the following steps: the method comprises the steps of obtaining Doppler frequency offset of a first channel, obtaining a first elevation angle corresponding to the Doppler frequency offset of the first channel based on a corresponding relation between the Doppler frequency offset and the elevation angle of a satellite, calculating the distance between a terminal and the satellite by using the first elevation angle, and obtaining TA (timing advance) based on the distance, wherein the TA is used for compensating service link time delay between the terminal and the satellite. The elevation angle is acquired based on the corresponding relation between the pre-configured Doppler frequency offset and the elevation angle of the satellite, and the position information of the terminal is not needed to be used, so that even if the terminal cannot be positioned by using a positioning mode such as GNSS positioning, the TA for compensating the service link time delay between the terminal and the satellite can be acquired, and the TA for communicating with the network is acquired.

Inventors

  • SUN XIAOYU
  • LIU ZHENG

Assignees

  • 荣耀终端股份有限公司

Dates

Publication Date
20260508
Application Date
20241105

Claims (10)

  1. 1. A method of acquiring a timing advance, TA, for use in a terminal, the terminal in communication with a satellite on a first channel, the method comprising: Acquiring Doppler frequency offset of the first channel; acquiring a first elevation angle corresponding to the Doppler frequency offset of the first channel based on a corresponding relation between a preconfigured Doppler frequency offset and the elevation angle of the satellite; Calculating a distance between the terminal and a satellite using the first elevation angle; and based on the distance, acquiring a TA, wherein the TA is used for compensating the service link time delay between the terminal and the satellite.
  2. 2. The method of claim 1, wherein the correspondence of doppler frequency offset and elevation angle of the satellite comprises: and the corresponding relation obtained through measurement comprises the Doppler frequency offset value or the elevation angle of the satellite corresponding to the range of the Doppler frequency offset value.
  3. 3. The method according to claim 2, wherein the obtaining a first elevation angle corresponding to the doppler frequency offset of the first channel based on a correspondence between a pre-configured doppler frequency offset and an elevation angle of the satellite includes: inquiring Doppler frequency offset of the first channel or elevation angle corresponding to the range of the Doppler frequency offset of the first channel in the corresponding relation.
  4. 4. The method of claim 1, wherein the correspondence of doppler frequency offset and elevation angle of the satellite comprises: a calculation rule indicating that the doppler frequency offset is obtained from the product of the elevation cosine value of the satellite and a parameter including the ratio of the electromagnetic wave frequency to the speed of light, and the radius of the earth.
  5. 5. The method of claim 4, wherein the angular velocity of the satellite motion is obtained based on gravitational constants, mass of the earth, radius of the earth, and altitude of the satellite from the ground.
  6. 6. The method according to any one of claims 1-5, wherein the obtaining the doppler shift of the first channel includes: and acquiring Doppler frequency offset of the first channel through the pilot frequency sequence or the synchronization word transmitted by the first channel.
  7. 7. An electronic device comprising one or more processors, a memory and a touch screen, the memory for storing program code, the processor for running the program code to cause the electronic device to implement the method of acquiring a timing advance TA as claimed in any one of claims 1 to 6.
  8. 8. A computer readable storage medium having stored thereon instructions which, when run on an electronic device, cause the electronic device to perform the method of acquiring a timing advance TA according to any of claims 1 to 6.
  9. 9. A computer program product, characterized in that it has stored thereon a computer program which, when run on an electronic device, causes the electronic device to implement the method of acquiring a timing advance TA according to any of claims 1 to 6.
  10. 10. A chip system, comprising: At least one processor and an interface for receiving code instructions and transmitting to the at least one processor, the at least one processor executing the code instructions to implement the method of acquiring a timing advance, TA, of any of claims 1 to 6.

Description

Method for acquiring Timing Advance (TA) and related device The application is a divisional application of the application patent application with the name of 'method for acquiring timing advance TA and related device' which is filed to China patent office with the application number 202411564086.0 and the application date 2024 and 11 month 05. Technical Field The present application relates to the field of satellite communications technologies, and in particular, to a method for acquiring timing advance TA and a related device. Background Is an important parameter in Non-terrestrial network (Non-TERRESTRIAL NETWORKS, NTN) communications. The base station and the terminal need to adjust the time sequence relation between the uplink frame and the downlink frame according to the timing advance (TIMING ADVANCE, TA) so that the uplink frame and the downlink frame are staggered in time, and collision is avoided. In NTN, one of the bases for acquiring TA is the service link delay. The service link delay may be understood as the delay required for transmitting service (e.g. voice service or data service) data between the terminal and the base station. The existing protocol provides that the terminal obtains the position information of the terminal based on the positioning of the global navigation satellite system (Global Navigation SATELLITE SYSTEM, GNSS), the position information of the terminal is reported to the base station, and the terminal and the base station calculate the service link time delay based on the position information of the terminal. However, in practice, the terminal may not have GNSS positioning capability, or the channel quality where the terminal is located may not support GNSS positioning, so it is difficult to acquire the service link delay, and thus it is difficult to acquire the TA. Disclosure of Invention The application provides a method for acquiring Timing Advance (TA) and a related device, which aim to solve the problem that TA is difficult to acquire caused by difficult acquisition of service link time delay, and the disclosed technical scheme is as follows: A first aspect of the present application provides a method for acquiring a timing advance TA, applied to a terminal, where the terminal communicates with a satellite in a first channel, the method comprising: the method comprises the steps of obtaining Doppler frequency offset of a first channel, obtaining a first elevation angle corresponding to the Doppler frequency offset of the first channel based on a corresponding relation between the Doppler frequency offset and the elevation angle of a satellite, calculating the distance between a terminal and the satellite by using the first elevation angle, and obtaining TA (timing advance) based on the distance, wherein the TA is used for compensating service link time delay between the terminal and the satellite. The elevation angle is acquired based on the corresponding relation between the pre-configured Doppler frequency offset and the elevation angle of the satellite, and the position information of the terminal is not needed to be used, so that even if the terminal cannot be positioned by using a positioning mode such as GNSS positioning, the TA for compensating the service link time delay between the terminal and the satellite can be acquired, and the TA for communicating with the network is acquired. In some implementations, the correspondence of Doppler frequency offset to elevation angle of the satellite includes a correspondence obtained by measurement, the correspondence including an elevation angle of the satellite corresponding to a Doppler frequency offset value or range of Doppler frequency offset values. The mode of acquiring the corresponding relation between the Doppler frequency offset and the elevation angle through actual measurement has higher accuracy, so that more accurate TA can be acquired. In some implementations, acquiring a first elevation angle corresponding to the Doppler frequency offset of the first channel based on a pre-configured correspondence of the Doppler frequency offset and the elevation angle of the satellite includes querying the correspondence for the Doppler frequency offset of the first channel or the elevation angle corresponding to the range in which the Doppler frequency offset of the first channel is located. One range corresponds to one elevation angle, which is beneficial to reducing the workload of measurement. In some implementations, the correspondence of Doppler frequency offset to satellite elevation angle includes a calculation rule indicating that Doppler frequency offset is obtained from the product of satellite elevation angle cosine value and parameters including ratio of electromagnetic wave frequency to light velocity, and radius of earth. The method for acquiring the elevation angle corresponding to the Doppler frequency offset through the calculation rule can reduce the workload of actual measurement, and can acqui