Method and apparatus for multicast mobility

1. A mobile access gateway (MAG) comprising: a first receiver configured to receive a first packet with a first Internet Protocol (IP) address from a first local mobility anchor node (LMA) and a second packet with a second IP address from a second LMA, wherein the first LMA is a multicast LMA for multicast traffic and the second LMA is a unicast LMA for unicast traffic; a router, configured to route the first packet and the second packet to a wireless transmit/receive unit (WTRU) using both unicast and multicast services; a second receiver configured to receive a router solicitation message from the WTRU; a processor configured to trigger a proxy binding update (PBU) message that includes multicast information on the first LMA; and wherein the processor is further configured to maintain a list of binding updates including entries for associating the WTRU with the first LMA and the second LMA.2. The MAG of claim 1, wherein the router is further configured to route the first packet with the first IP address to the WTRU used for unicast services, and route the second packet with the second IP address to the WTRU used for unicast services.3. The MAG of claim 2, wherein the processor is further configured to initiate indicating the first PBU message to the first LMA and the second PBU message to the second LMA. 4. The MAG of claim 1, wherein the processor is further configured to distinguish between unicast service traffic and multicast service traffic.