Patent ID: 8213374

Claim:
A mobile communication method in which a mobile station transmits a control signal to a radio base station through uplink dedicated resources, the mobile communication method comprising the steps of: (A) activating a second timer, when it is determined to change a reception cycle of the mobile station from a continuous reception cycle to a first discontinuous reception cycle; (B) transmitting, from the radio base station to the mobile station, a change instruction instructing the mobile station to change the reception cycle of the mobile station from the first discontinuous reception cycle to a second discontinuous reception cycle longer than the first discontinuous reception cycle, and releasing the uplink dedicated resources, when the second timer expires with no downlink data signal transmitted after the activation of the second timer; and (C) changing, at the mobile station, the reception cycle of the mobile station from the first discontinuous reception cycle to the second discontinuous reception cycle, and releasing the uplink dedicated resources, in response to the received change instruction.