Patent ID: 8478285

Claim:
A radio communication method in which a mobile station receives signaling information transmitted by a base station via a shared control channel, detects a presence/absence of data addressed to the mobile station, demodulates a shared data channel when the data is present, and receives data transmitted by the base station, the method comprising the steps of: transmitting, from the base station to the mobile station, a synchronization request specifying a Signature and an uplink radio resource via the shared control channel; transmitting, at the mobile station, feedback information which includes a data series corresponding to the Signature specified by the synchronization request, as a response to the synchronization request, via a random access channel; generating, at the base station, timing advance information based on a timing of receipt of the feedback information, and transmitting, from the base station to the mobile station, the timing advance information; and adjusting, at the mobile station, a transmission timing of uplink data based on the timing advance information.