Patent ID: 7107066
Filing Date: 2006-09-12
Classification: H04L,H04W

Abstract:
1. A Gateway node (GGSN) establishing a multicast service in a packet radio data network including at least one serving node (SGSN) coupled to the gateway node, a plurality of radio access nodes (RAN) coupled to the serving node (SGSN), the packet radio network transporting packet data from an external packet data network to mobile stations (MS) wirelessly attached to radio access nodes (RAN), comprising the steps of: whereby the gateway node (GGSN), upon receiving a membership report from a mobile station examining if there is a context for the multicast group in the gateway node (GGSN), if no multicast group exists, setting up a connection to the multicast source from the gateway node (GGSN), creating a context in the gateway node (GGSN) for the multicast group; adding the mobile station to the multicast group; and sending a multicast context activation message to the serving node (SGSN) from which the membership report message appeared in order to set up a connection with the serving node (SGSN).