Patent ID: 8584170

Claim:
An Internet group management system of a push-type multicast supporting Internet group management with respect to a packet stream simultaneously being transmitted to a subscriber accessing the same node via a passive access network where at least one subscriber accesses a single node, the system comprising: an input packet classifying unit to sort a multimedia contents packet corresponding to a contents transmission packet from the packet stream; and a program managing unit to construct a broadcasting program table having information of the sorted multimedia contents packet, to determine, based on the constructed broadcasting program table, a reception condition of a requested program that is requested by a user, and to output a multimedia contents packet corresponding to the requested program, wherein the program managing unit performs: obtaining a destination IP address corresponding to the multimedia contents packet and a source IP address, and constructing the broadcasting program table; and constructing the broadcasting program table by further including a viewing determination field indicating whether a user is currently viewing a broadcasting program corresponding to the multimedia contents packet, a reception time field indicating a reception time of the broadcasting program, a max response time field indicating a maximum response time with respect to a broadcasting program having an IGMP group-specific query or a group-and-source specific query, and a waiting time field indicating a continuity of the broadcasting program.