Method and Apparatus for Uplink Timing Synchronization
AssigneeHuawei Technologies Co., Ltd.
InventorsPeng Liu, Jun Chen, Jingjing Huang, Guangjian Wang
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Abstract
This application provides methods and apparatuses for uplink timing synchronization. The method includes: determining, based on beam information of a first beam and ephemeris information of the satellite base station, an uplink timing frame number of a first cell corresponding to the first beam; determining timing information of a first terminal device in the first cell based on the uplink timing frame number of the first cell, where the timing information is used to indicate a timing advance or a timing lag; and outputting the timing information.
Claims20
-19. (canceled)
A method, comprising:
- determining, by a satellite base station based on beam information of a first beam and ephemeris information of the satellite base station, an uplink timing frame number of a first cell corresponding to the first beam;
- determining, by the satellite base station based on the uplink timing frame number of the first cell, timing information of a first terminal device in the first cell, wherein the timing information indicates a timing advance or a timing lag;
- and
- outputting, by the satellite base station, the timing information of the first terminal device.
A method, comprising:
- receiving, by a terminal device, timing information usable to perform uplink timing synchronization with a first cell, wherein the timing information is determined based on an uplink timing frame number of the first cell, and the uplink timing frame number is determined based on beam information of a first beam and ephemeris information of a satellite base station;
- determining, by the terminal device, a timing advance or a timing lag based on the timing information;
- and
- performing, by the terminal device, uplink timing synchronization with the first cell based on the timing advance or the timing lag.
An apparatus, comprising:
- a processor;
- and
- a non-transitory memory, wherein the non-transitory memory is configured to store a computer program, and the processor is configured to invoke and execute the computer program, and the computer program includes instructions to:
- determine, based on beam information of a first beam and ephemeris information of a satellite base station, an uplink timing frame number of a first cell corresponding to the first beam;
- determine, based on the uplink timing frame number of the first cell, timing information of a first terminal device in the first cell, wherein the timing information indicates a timing advance or a timing lag;
- and
- output the timing information of the first terminal device.
Dependencies are inferred from the claim text.