The information sharer 320 may cause the terminal management table 540 to include the radio channel information indicating the radio channel is being used by the communication processor 310, in addition to the information obtained as a result of the SLS. The communication processor 310 may disperse the load of the network through dynamic channel control or uplink power control based on the radio channel information.

Further, the information sharer 320 may cause the terminal management table 540 to include application information, which indicates a type of the data communication performed by the radio terminal 400. The type of the data communication is, for example, file transfer, the Voice over Internet Protocol (VoIP), or streaming. The switch determiner 330 determines the priority for ensuring the communication quality by taking a necessary bandwidth or allowable delay time into account on the basis of the application information, and may determine the switch destination candidate device 300 or the switch source candidate terminal 400 in accordance with the determined priority.

The other device information that the information sharer 320 acquires may only be the number of connections of the radio terminals 400 to the other device 300. That is, the information sharer 320 may only acquire the information necessary for the criteria for determining the switch of the connection destination of the connecting terminal 400.