The present invention is a system, method and network (110) for multicast distribution of presence information to a plurality of communication devices (102, 104, 106, 108). A contact list (122, 124, 126, 128), associated with each communication device, identifies one or more of the other communication...http://www.google.fr/patents/US6993327?utm_source=gb-gplus-shareBrevet US6993327 - Multicast distribution of presence information for an instant messaging system
Multicast distribution of presence information for an instant messaging system
