ROUTER DEVICE AND COMMUNICATION METHOD

摘要

A router device includes: a lower node layer information acquisition section (38) for acquiring connection information on whether a lower node layer (34) is connected to a base station of an external network; and a route judgment section (40) for making judgment when receiving a packet destined from a radio terminal device in the same local network to an external network terminal, so that the received packet is transferred to the base station when the base station is connected and the transmission destination is judged by referencing the routing table if the base station is not connected. Thus, when the base station is connected, the received packet is transferred to the base station. Accordingly, it is possible to transfer the packet outside via the router device intended by a terminal and reduce the load in the local network.