RADIO COMMUNICATION SYSTEM, COMMUNICATION DEVICE, AND RELAY DEVICE

摘要

There is disclosed a technique for rapidly moving a context as setting information required for connecting a mobile terminal to a network from a previous communication device to a destination communication device when no reliability exists between the previous communication device and the destination communication device. According to the technique, the mobile terminal (101) is connected to a previous AR (access router) (201) before movement and connected to a destination AR (202) having no direct reliability with the previous AR (201) after the movement. A relay AR (501) has reliability with the previous AR (201) and the destination AR (202) and relays them. Before the mobile terminal (101) moves, the previous AR (201) transmits a context via the relay AR (501) to the destination AR (202). When the destination AR (202) receives, after receiving the context, an activate request requiring connection from the mobile terminal (101) which has moved, the destination AR (202) authenticates the mobile terminal (101) by using the received context.