Patent ID: 8385263
Filing Date: 2013-02-26
Classification: H04W

Abstract:
1. A communication system configured to conduct a protocol operation to implement local mobility of a mobile terminal having a plurality of interfaces on a network side, and that includes a mobility management domain formed therein, the communication system comprising: a plurality of edge devices disposed at an edge on a terminal side of an access network of the mobility management domain, with which the mobile terminal is connectable; and a domain managing device that manages a packet transfer path to the mobile terminal that connects with the mobility management domain, and keeps association information that associates the mobile terminal with the edge device with which the mobile terminal currently connects, wherein when the domain managing device receives from a first edge device a message notifying that the mobile terminal tries to connect with the first edge device, the domain managing device refers to the association information kept therein to check whether the association information includes association information of the mobile terminal that tries to the first edge device, if the association information of the mobile terminal is included, the domain managing device makes an inquiry to a second edge device associated by the association information of the mobile terminal to inquire whether connection with the mobile terminal is valid or not, if the connection with the mobile terminal is valid, the domain managing device keeps association information that associates the mobile terminal with both of the first edge device and the second edge device, on the other hand, if the connection with the mobile terminal is not valid, the association information associating the mobile terminal with the second edge device is deleted, while keeping association information associating the mobile terminal with the first edge device.