Mobile communication system, mobile station device, base station device, and handover method

摘要

A communication path between base stations connected via a network is switched so that data received by a mobile station that is during handover is not interrupted. A mobile station (14-1) which has started a radio communication with a handover destination base station (12-2) switches a acquisition destination of data transmitted from a mobile station (14-2) with which the mobile station (14-1) communicates from a handover source base station (12-1) to the handover destination base station (12-2). After this, the mobile station (14-1) transmits a communication path switching request to a base station (12-3) which performs a radio communication with the mobile station (14-2). In response to the communication path switching request transmitted from the mobile station (14-1), the base station (12-3) releases an RTP session established with respect to the handover source base station (12-1).