Patent ID: 8000279

Claim:
A method of multicast communication to at least one user mobile terminal of a mobile IP network, via a mobile router equipped with functions for controlling and transmitting accesses by any user terminal to any multicast type communication, comprising: connecting the mobile router to the IP network; and transmitting a signalling message from the mobile router to the mobile router's home site, subsequent to the proceeding two steps, the performing: at the home site, discriminating the location of the mobile router in relation to the mobile router's home site, respectively to the mobile router's home organisation, based on the signalling message; transmitting to the mobile router an item of location discrimination information; and at the mobile router, for any request by a requesting user mobile terminal on the mobile IP network for access to a group multicast communication destined for the home site and relating to a multicast communication local to the home site, respectively to the home organisation, of the mobile terminal, substituting for the access request, when the location discrimination information indicates a connection of the mobile router outside the mobile router's home site, respectively outside the mobile router's home organisation, a request for access to an extended multicast communication providing access to the local multicast communication; transmitting, to the home site, the request for access to the extended multicast communication; receiving and transforming the extended multicast communication into a local transformed multicast communication at the mobile router; transmitting the local transformed multicast communication over the mobile IP network to at least the requesting user mobile terminal.