Patent ID: 7965695

Claim:
A communication system including an IP Backbone (IP_BB) the communication system including: a mobile node communicating with a correspondent node; a home agent node managing the mobile node and relaying packets sent from the mobile node to the correspondent node; a proxy node being located closer to the mobile node than the home agent node for relaying the packets from the mobile node to the home agent node; a corresponding proxy node for restoring and relaying packets to the correspondent node, and a Network Control Platform (NCPF) including a routing manager managing a route of the packets, the proxy node comprising: a detection unit for detecting a trigger of a packet route optimization; a notification unit for notifying the routing manager of the detected trigger; a route-establishing unit for establishing the optimized routing path using an address switching method according to a command received from the routing manager; a securing unit for securing a routing address for the packets, the routing address being dynamically allocated to the mobile node; and a routing unit for routing the packets secured by the securing unit to the corresponding proxy node through the established optimized routing path, the routing manager sending the command to establish an optimized routing path between the proxy node serving the mobile node and another proxy node serving the correspondent node when the trigger is notified, and the mobile node comprising: a deciding unit for deciding whether a routing address privacy is required or not; and a sending unit for sending a Binding Update to the correspondent node so as to reveal the routing address when said deciding unit decided that the routing address privacy is not required.