A method and system for supporting mobility of a mobile node in which, when it is recognized that the mobile node has moved into a foreign sub-network, the mobile node is allocated, by its home sub-network, a new Internet protocol address suitable for a prefix of the foreign sub-network after movement...http://www.google.com/patents/US7573846?utm_source=gb-gplus-sharePatent US7573846 - Method and system for supporting mobility of mobile terminal
