Patent ID: 8737352

Claim:
A communication system comprising: a first base station configured to perform communication using a first communication protocol which uses first radio frames and first synchronization signals synchronizing the first radio frames; a second base station configured to perform communication using a second communication protocol which uses second radio frames; and a mobile terminal configured to perform communication on the basis of the first communication protocol and the second communication protocol, receive, while communicating with the first base station, second synchronization signals from the second base station, the second synchronization signals being based on the first synchronization signals and synchronizing the second radio frames, and estimate transmitting timing of the second radio frames including symbols on the basis of the received second synchronization signals, wherein each of the first synchronization signals has a length corresponding to each of the first radio frames, and each of the second synchronization signals is a signal obtained by adjusting the length of each of the first synchronization signals to become a length corresponding to each of the second radio frames.