Patent ID: 8554229

Claim:
A communication system that includes a mobile terminal, a primary base station which communicates with the mobile terminal by using a first frequency, and a secondary base station which communicates with the primary base station and the mobile terminal by using the first frequency and which also communicates with the mobile terminal by using a second frequency different from the first frequency, wherein: the primary base station sends a signal to the mobile terminal and the secondary base station; in response to receiving the signal from the primary base station, the secondary base station sends the mobile terminal a pseudo signal including identification information which indicates the secondary base station, by using the first frequency; and the mobile terminal compares a reception power of the signal received from the primary base station with a reception power of the pseudo signal received from the secondary base station, and performs communication with the primary base station in response to determining that the reception power of the signal is higher than the reception power of pseudo signal, and performs communication with secondary base station in response to determining that the reception power of the pseudo signal is higher than the reception power of the signal.