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

Claim 5:
6. The timing advance update method according to claim 5, wherein when a distance between the terminal and the satellite is less than or equal to a first communication distance:
the calculating, by the terminal, a frame TA offset of each frame of data based on the TA compensation information and a ratio of the TA update period to the data frame length of the to-be-sent uplink data comprises:
calculating, by the terminal, the frame TA offset based on the maximum TA offset, the maximum transmission delay TA offset, and the ratio of the TA update period to the data frame length of the to-be-sent uplink data, and

the performing, by the terminal, TA. compensation on a TA of each frame of data in the TA update period based on the frame TA offset comprises:
selecting, by the terminal, an absolute value of the maximum transmission delay TA offset;
adding the absolute value of the maximum transmission delay TA offset and N frame TA offsets; and
performing TA compensation on the TA of each frame of data in the TA update period, wherein N is a sequence number of a data frame, and N is an integer greater than or equal to 1.