A communication system includes a control device, a first base station, and a second base station, wherein the first base station and the second base station are execute an S2 handover process, and after the S2 handover process, the first base station and the second base station execute an X2 handover process, the first base station transmits address information of the first base station to the second base station via the control device when the first base station executes the S2 handover process to the second base station, the second base station stores the received address information of the first base station, and transmits a connection request to the first base station based on the received address information of the first base station, and the first base station establishes a connection for the X2 handover process in response to the connection request.