Base station device, mobile station device, communication system, and communication method

A communication system which performs communication between a base station device configuring at least one cell and a mobile station device, wherein:

• the base station device comprises:
• a synchronization signal generation unit which generates a synchronization signal corresponding to a cell identity for identifying a cell;
• and
• a transmission unit which generates a first transmission signal including the synchronization signal using a first parameter obtained from the cell identity, generates a second transmission signal excluding the synchronization signal using a second parameter obtained from a virtual cell identity different from the cell identity, transmits the first transmission signal using a first frequency band, and transmits the second transmission signal via a second frequency band different from the first frequency band, and
• the mobile station device comprises:
• a reception unit which receives a first reception signal including the synchronization signal using the first parameter obtained from the cell identity via the first frequency band and receives a second reception signal using the second parameter obtained from the virtual cell identity via the second frequency band.

A communication method for use in a communication system which performs communication between a base station device configuring at least one cell and a mobile station device, the communication method comprising:

• generating a synchronization signal corresponding to a cell identity for identifying a cell;
• generating a first transmission signal including the synchronization signal using a first parameter obtained from the cell identity, generating a second transmission signal excluding the synchronization signal using a second parameter obtained from a virtual cell identity different from the cell identity, transmitting the first transmission signal using a first frequency band, and transmitting the second transmission signal via a second frequency band different from the first frequency band;
• and
• receiving a first reception signal including the synchronization signal using the first parameter obtained from the cell identity via the first frequency band and receiving a second reception signal using the second parameter obtained from the virtual cell identity via the second frequency band.