A method and system for selectively including a device-ID within a Mobile-IP registration request. A foreign agent, AAA server or other entity decides, based at least in part on a user-ID carried in a Mobile-IP registration request from a mobile node, whether to insert a device-ID of the mobile node...http://www.google.ca/patents/US7443824?utm_source=gb-gplus-sharePatent US7443824 - Method and system for selectively including a device-identifier within a mobile IP registration request being sent on behalf of a mobile node to a mobile IP home agent