Route switching system, the path switching method, and the mobile terminal

When the UE is offloaded from the first PDN-GW to the second PDN-GW, if there are additional connections to the first PDN-GW of the UE, a process for their additional connections on UE side techniques for providing such route switching system capable of performing the determined it is disclosed, relays packets between the communication apparatus and the mobile terminal 0101, according to the technique, a relay apparatus for enabling mutual communication, a control unit 0102 sends a message to a mobile terminal containing information indicating that the switch from the first switching device to the second relay device, a part of the route until the communication device from the mobile terminal before movement Te, besides the path that can be managed by a control device constructed between the mobile terminal and the first switching device, a part of the path from the mobile terminal before movement to the communication device, a mobile terminal the first relay instrumentation It determines whether alternative route unmanageable exists by constructed control device between, and a mobile terminal for performing a predetermined process on another route, if any.