Patent ID: 8913614

Claim:
A method for implementing multicast service, comprising: a multicast source sending a multicast service packet of which a destination address is configured to be a Group Access Identity (GAID) assigned to the multicast source; searching by an Access Service Router (ASR) to which the multicast source belongs for a corresponding Group Router Identity (GRID) in an established GAID-GRID mapping table according to the GAID after the ASR receiving the multicast service packet, and sending the multicast service packet to a General Switch Router (GSR) by adopting the found GRID; the GSR searching for a corresponding multicast tree according to the GRID of the multicast service packet, and sending the multicast service packet to the ASR in the service area according to the multicast tree; and the ASR in the service area searching for a corresponding GAID in the established GAID-GRID mapping table according to the GRID, and sending the multicast service packet to a terminal under the ASR in the service area by adopting the found GAID; wherein the method for implementing multicast service is applied to the Location Identification Separation Network, the GAID is used to identify multicast stream between the terminal and the ASR, the GRID is used to identify the multicast stream in a core network.