Patent ID: 7643506
Filing Date: 2010-01-05
Classification: H04L

Abstract:
1. A multicast information broadcasting method extended from a local multicast information broadcast on an originating site to a roaming terminal user belonging to this originating site, to at least one separate site hosting this roaming terminal and linked to this originating site by the IP network, the local multicast information broadcast being generated by an information broadcasting source located at a first local multicast information broadcasting address in this originating site, upon interconnecting said roaming terminal to the IP network on this separate site, the method comprising: a) transmitting, from the roaming terminal to the originating site, an extended multicast information broadcast request message, said request message containing at least said first local multicast information broadcasting address and an identification code of said roaming terminal; and, following the identification of said roaming terminal by said originating site, b) transmitting, from the originating site to said roaming terminal, a message offering access to a global multicast information broadcast, said message offering access including at least one second global multicast information broadcasting address, the broadcasting source of which is identified in the originating site; and, following the receipt of said message offering access by said roaming terminal, c) transmitting from the roaming terminal to the originating site, via the IP network, a message accepting the offer of access to the information being broadcast at said second global multicast information broadcasting address; and, after receipt of the message accepting the offer of access on said originating site, d) transferring the information to be broadcast from the first to the second broadcasting address; and e) transmitting, by global multicast broadcast, the information to be broadcast under the second address, which enables said roaming terminal interconnected to the separate site to receive, on the separate site, the information being broadcast under the first local broadcasting address, broadcast under the second global broadcasting address.