Patent ID: 7606186
Filing Date: 2009-10-20
Classification: H04L,H04W

Abstract:
1. A method for performing multicast transmission for a multicast group within a telecommunication network, wherein said network includes a core network comprising a router and at least one host in an access network part for handling users, wherein at least one intermediate node is located between the router and the host, and wherein the telecommunication network has a point-to-point layer above a transport layer, said method comprising the steps of: a user registers to a multicast group for the multicast transmission; the router receives the registration; the host is informed about the user being served by the host and registering to the multicast group; the multicast transmission between the router and the host is introduced on the transport layer and said transmission is performed by means of at least one transport level multicast group tunnel on the transport layer, wherein said tunnel is assigned to the multicast group and wherein said tunnel is established by means of a transport layer protocol for tunneling; and, the host uses radio bearer signaling towards the user registered to the multicast group to route the multicast data to the user; wherein in order to perform registration or de-registration of a user to or from a multicast group, the user informs the router directly or via the intermediate node, and the router informs the intermediate nodes and/or the hosts to register or de-register to the transport level multicast group tunnel.