Patent ID: 8774039

Claim:
A communication system comprising: a mobile terminal connectable to a network-based mobility management domain, and having a plurality of communication routes to a correspondent node with which the mobile terminal communicates; and a network node for performing location management of a terminal connected to the network-based mobility management domain, wherein the network node is configured to monitor a packet sent from the correspondent node to the mobile terminal and, in the case of detecting the packet sent from the correspondent node to the mobile terminal, determine whether˜the correspondent node is connected to the same or a different network-based mobility management domain as the mobile terminal, and report a result of the determination to the mobile terminal, and wherein the mobile terminal is configured to select a communication route used for communicating with the correspondent node, based on the result of the determination, wherein the network node is configured to hold binding information of the mobile terminal for network-based mobility management and binding information of the mobile terminal for client-based mobility management by the mobile terminal, and determine whether or not the correspondent node is connected to the same network-based mobility management domain by referencing to both binding information.