| 摘要 |
There is disclosed a technique for realizing an effective handover by maintaining a packet loss rate in the fast handover technique, while reducing communication traffic and loads of mobile terminals and access routers. According to the disclosed technique, a mobile terminal (MN10) has a correspondence between information (the link layer addresses of APs) of access points (APs 22,23, 32,33) and information (the link layer addresses of ARs, and the network prefixes and prefix lengths of subnets 20 and 30 belonging to ARs) of access routers (ARs 21,31) controlling the APs. During an L2 handover between different subnets, the mobile terminal (MN10) produces, with reference to that correspondence, NCoA of the subnet to which the mobile terminal moves. During an L2 handover in the same subnet, the mobile terminal does not change the NCoA but implements only the L2 handover with reference to that correspondence. If having no correspondence related to the destination AP of the L2 handover, the mobile terminal performs a processing based on the conventional fast handover.
|
