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

Claim 0:
1. A terminal comprising:
a receiver configured to receive a Timing Advance command; and
a controller configured to control 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 by the receiver, the controller starts the TA timer,
wherein, upon receiving, by the receiver, a contention resolution message in the contention based random access procedure for the SI request, the controller 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 controller is configured to keep the TA timer running in a time interval from a timing at which the receiver receives the contention resolution message to a timing at which the transmission of the acknowledgement information is completed.