Multicast support in packet switched wireless networks
First Claim
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).
1 Assignment
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Accused Products
Abstract
A packet radio data network includes a gateway node (GGSN), 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. The external packet data network includes, an Internet Service Provider (ISP), to mobile stations (MS) wirelessly attached to radio access nodes (RAN). A mobile station (MS) issues a membership report message requesting content of a specific multicast group, whereupon the gateway node (GGSN) issues a multicast context activation message to the serving node (SGSN). The serving node (SGSN) informs the radio access network (RAN) that the mobile station is joining the respective multicast group and sends a multicast activation response to the gateway node (GGSN).
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Citations
7 Claims
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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:
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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). - View Dependent Claims (2, 3, 4, 5, 6, 7)
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Specification