A method in a communication system wherein a user (1) is arranged to register with a control entity (22) comprises sending a message from the communication system to the user (1) requesting that the user re-register with said communication network. The user is caused to re-register with said network...http://www.google.fr/patents/US7818002?utm_source=gb-gplus-shareBrevet US7818002 - Subscriber registrations in a mobile communication system
Subscriber registrations in a mobile communication system
