In a mobile IP network system containing a plurality of radio access networks 2 for connecting with mobile stations 1 via radio links and an IP network 102 connected with a plurality of packet nodes for transferring IP packets, each of the radio access networks has at least one base station controller...http://www.google.com/patents/US7009950?utm_source=gb-gplus-sharePatent US7009950 - Mobile IP network system and connection switching method
Mobile IP network system and connection switching method