Wireless communication system, communication method, base station, and mobile terminal

A wireless communication system comprising a mobile terminal and a plurality of base stations,

• the mobile terminal including communication unit adapted to perform communication with any of base stations through a plurality of frequency bands,
• the base station including:
• a communication unit configured to communicate with the mobile terminal, and
• a handover unit configured to perform handover with at least one other base station,
• the communication unit of the base station being adapted to broadcast, when communication through a plurality of frequency bands is possible, information directed to identifying a main frequency band from the plurality of frequency bands in a manner allowing discrimination from one or more frequency bands other than the main frequency band, before initiating handover,
• the communication unit of the mobile terminal being adapted to determine, when information directed to identifying the main frequency band is received from a second base station during having communication connection with a first base station, that a frequency band identified by the information is a subject of handover to the second base station.

A communication method between a mobile terminal and a plurality of base stations, the communication method comprising the steps of:

• when communication through a plurality of frequency bands is possible, broadcasting, from the base station, information directed to identifying a main frequency band from the plurality of frequency bands in a manner allowing discrimination from one or more frequency bands other than the main frequency band, before initiating handover,
• when the mobile terminal receives information directed to identifying the main frequency band from a second base station, during having communication connection with a first base station, determining that a frequency band identified by the information is a subject of handover to the second base station,
• performing handover with the first base station by the second base station in response to a request from the mobile terminal through the identified frequency band, and
• the mobile terminal communicating with the second base station through a plurality of frequency bands.