SWITCHING SOURCE DEVICE, SWITCHING DESTINATION DEVICE, HIGH-SPEED DEVICE SWITCHING SYSTEM, AND SIGNALING METHOD

摘要

There is provided a session mobility for moving a session held between a switching source device and a communication partner to a switching destination device other than the switching source device. The switching source device transmits medium data associated with the session by multicast or broadcast prior to device switching and a switching destination candidate device receives the medium data transmitted, so that a switching destination confirmed device determined upon device switching outputs the medium data in place of the switching source device. Thus, it is possible to increase the switching speed from a switching source device to a switching destination device to such an extent that a user cannot perceive the time required for switching.