Patent ID: 8599750

Claim:
A communication system, the communication system comprising: a plurality of mobile station devices; a first base station device, the first base station device is configured to manage communication between each mobile station device of said plurality of mobile station devices and the first base station device in at least one sector; and a second base station device, the second base station device being provided around the first base station device, wherein, in the at least one sector, the first base station device is configured to change from a first state to a second state, the first state being a state in which transmission from the first base station device is able to be received by every mobile station device being able to communicate with the first base station device in an initial cell search, and the second state being a state in which transmission from the first base station device is unable to be received by every mobile station device being able to communicate with the first base station device on the first state in the initial cell search, and at least radio transmission powers of synchronization signals used in the initial cell search for the at least one sector from the first base station device is suppressed and/or halted, and the first base station device is configured to notify the second base station device of information by which the second base station device is able to recognize the change of the state of the first base station device before the changing from the first state to the second state, and to transmit a handover command to a mobile station device for the mobile station device to perform handover before transmission signals for the at least one sector are suppressed and/or halted.