Control station, mobile station and mobile communication system

A mobile communication system comprising:

• a mobile station connectable to, a first access network in which a bearer transfer path that guarantees a predetermined QoS has been established, and a second access network in which a transfer path different from the first access network has been established;
• and
• a control station set with a path that performs communication of a plurality of flows with the mobile station by way of the transfer path of the first access network, wherein
• the mobile station comprising:
• a specific bearer switching request transmitting portion for transmitting a specific bearer switching request including information on a flow to be switched to the transfer path of the second access network, among the plurality of flows being communicated by way of the transfer path of the first access network, to the control station, and
• the control station comprising:
• a specific bearer switching request receiving portion for receiving the specific bearer switching request including information on the flow from the mobile station;
• and,
• a switching portion for switching a communication path of the flow included in the specific bearer switching request, from the first access network to the second access network.