Communication system and program for executing the method by a computer these communication handover method, and a communication message processing method

摘要

Even after the handover, technology that is received continuously and rapidly additional service that was received before the handover (for example, QoS guarantee) and is disclosed, according to the technique mobile terminal mobile terminal, (MN10) is, and (the link-layer address of the AP) information access points (AP22,23,32,33), access router with under the AP link layer address of (AR, IP address of the AR information (AR21,31) , has a relationship between the presence or absence) of the implementation of additional service realizing function prefix length and the network prefix of the subnet 20 and 30 belonging to the AR, is mobility support, NCoA of the subnet of the destination by referring to the relationship I want to generate a. Then, after checking the NCoA, AR that sends the NCoA to the IP address of the AR of the handover destination, and receives a message, initiates the establishment process of an additional service relating to the mobile terminal.