COMMUNICATION METHOD, COMMUNICATION SYSTEM, MOBILE NODE, PROXY NODE, AND MANAGEMENT NODE

摘要

A technique of acquiring a binding ID when a mobile node performs handover is disclosed. According to the technique, when an MN (10) performs an initial startup on a Non-3GPP network (30), a AAA server (50) generates and stores the binding ID, transmits it to a proxy node (31), and transmits allocation information indicating that the proxy node is allocated the binding ID to the MN. When performing the handover to a 3GPP network (20), the MN requests the binding ID to an HA (32). The HA then requests the binding ID to the AAA server and the AAA server transmits the binding ID to the HA. The HA receives the binding ID and transmits it tothe MN.