| 摘要 |
A mobile communication system according to the present invention is provided with a base station and a mobile station that communicates with the base station. In a communication protocol between the base station and the mobile station, a plurality of state update frames are defined in a time domain. The base station is configured to transmit a state update data to instruct that the mobile station is set to either an active state or a suspended state, in each of the plurality of the state update frames. At the same time, the base station is configured to transmit a packet only to the mobile station that has been set to the active state by the state update data. The base station in advance notifies the mobile station of packet transmission by transmitting a control data including a data necessary to receive the packet, earlier than the packet transmission by a predetermined time difference. The mobile station is set to either the active state or the suspended state in response to the state update data. At the same time, the mobile station is configured to receive the control data and the packet when being set to the active state, and is configured not to receive the control data and the packet when being set to the suspended state.
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