Patent ID: 11864237
Assignee: NTT DOCOMO, INC.
Field: Digital communication (Electrical engineering)
Classification: CPC H | IPC H

Claim 2:
3. A communication method by a terminal, the method comprising:
receiving a Timing Advance command; and
controlling a time Alignment (TA) timer related to uplink time alignment,
wherein the terminal performs a contention based random access procedure for a system information (SI) request,
wherein, in response to receiving the Timing Advance command, the controlling starts the TA timer,
wherein, upon receiving a contention resolution message in the contention based random access procedure for the SI request, the controlling stops the TA timer after completing transmission of acknowledgement information for the contention resolution message in the contention based random access procedure for the SI request, and
wherein the controlling keeps the TA timer running in a time interval from a timing at which the contention resolution message is received to a timing at which the transmission of the acknowledgement information is completed.