Patent ID: 11968640
Assignee: HUAWEI TECHNOLOGIES CO., LTD.
Field: Digital communication (Electrical engineering)
Classification: CPC H | IPC H

Claim 7:
8. The timing advance update method according to claim 1, wherein the method further comprises:
obtaining, by the terminal, location information of the terminal;
determining, by the terminal, a relative location of the terminal in the beam cell based on the location information and a location of an edge point of the beam cell;
performing, by the terminal, linearization processing on a TA offset between two edge points of the beam cell;
obtaining a first slope of a TA offset linear change based on the TA offset between the two edge points of the beam cell, or
obtaining a second slope of a transmission delay TA offset linear change based on a transmission delay TA offset between the two edge points of the beam cell; and
obtaining a TA offset of a current location of the terminal based on the relative location of the terminal and the first slope, or
obtaining a transmission delay TA offset of a current location of the terminal based on the relative location of the terminal and the second slope, wherein
the performing, by the terminal, TA compensation based on the updated TA value and the TA compensation information comprises:
when a distance between the terminal and a satellite is less than or equal to a first communication distance, adding, by the terminal, the updated TA value and an absolute value of the TA offset of the current location of the terminal to perform TA compensation; and
when the distance between the terminal and the satellite is greater than or equal to a second communication distance, subtracting, by the terminal, an absolute value of the transmission delay TA offset of the current location of the terminal from the updated TA value to perform TA compensation, wherein the second communication distance is greater than the first communication di stance.