MOBILE TERMINAL MANAGING DEVICE, MOBILE TERMINAL, AND COMMUNICATION SYSTEM

摘要

A method where home agents dynamically communicate their availability to serve as alternate home agents to each other, and a technology where the registered home agent proactively informs the mobile node to switch home agents are disclosed. According to the technique, a home agent (1000) has new functional blocks to detect the presence of an affiliated roaming mobile node and proceeds to advise the designated home agent of the mobile node regarding their availability. When the registered home agent decides to handover a mobile node, the available alternate home agents are sorted according to the metric of hop count distance and the highest valued is selected so that an available alternate home agent is assigned. A specially formatted mobility option is sent to the mobile node in order to direct it to register to the newly selected alternate home agent.