Patent ID: 11930510
Assignee: MIICS & PARTNERS JAPAN CO., LTD.
Field: Digital communication (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A mobile station device included in a mobile communication system, the mobile station device comprising:
a receiver configured to receive, on a physical downlink control channel from a base station device, control information having a downlink control information format and being addressed to the mobile station device,
wherein the downlink control information format is used with a same total number of bits for downlink scheduling and an uplink synchronization request,
in a case that the downlink control information format is used for the downlink scheduling, the control information provides a downlink resource assignment, and
in a case that the downlink control information format is used for the uplink synchronization request, a preset value is set for a field of the downlink resource assignment, wherein the preset value is used to determine whether the downlink control information format is used for the uplink synchronization request.