Mobile station, base station, communications system, and communication method

A communication system comprising:

• a mobile station that includes:
• a reception unit configured to receive signals transmitted from a base station,
• an estimation unit configured to determine whether or not a high speed packet channel is included in a signal received by the reception unit, based on a ratio of a received power of a control channel and a received power of a channel other than the control channel in the signal received by the reception unit, and to estimate traffic load in each of a plurality of communication areas in which the reception unit can receive the signal, based on a result of the determination;
• a measurement unit configured to obtain a reception quality of the signal received in each of a plurality of communication areas by the reception unit;
• a selection unit configured to select a communication area to perform communication from the plurality of communication areas based on the traffic load estimated by the estimation unit and the reception quality obtained by the measurement unit;
• a notification unit configured to notify a plurality of base stations of the communication area selected by the selection unit;
• and
• the base station that includes a control unit configured to control to communicate with the mobile station in the communication area notified from the notification unit.

A communication method, comprising:

• receiving, by a mobile station, a signal transmitted from a base station;
• determining, by the mobile station, whether or not a high speed packet channel is included in the signal received by the reception unit, based on a ratio of a received power of a control channel and a received power of a channel other than the control channel in the signal received in the reception step;
• estimating, by the mobile station, traffic load in each of a plurality of communication areas in which the mobile station can receive the signal in the reception step, based on a result of the determination;
• obtaining, by the mobile station, a reception quality of the signal received in each of a plurality of communication areas in the reception step;
• selecting by a mobile station, a communication area where the mobile station performs communication, from a plurality of communication areas, based on the traffic load estimated in the estimation step and the reception quality obtained in the obtaining step;
• notifying the base station of the selected communication area;
• and
• controlling by the base station, to communicate with the mobile station in the communication area notified from the mobile station.