| 摘要 |
A packet relay apparatus, a multicast packet communication system and a multicast packet communication method wherein even when a single service is constituted by a plurality of communication system data streams, the radio networks and the network resources can be effectively used. Each of relay apparatuses of GGSN (120), SGSN (130) and RNC (140) stores a service identifier, which identifies a service requested by a UE (150) , an associated group ID, which identifies the radio access system of the UE (150), and an associated RTP port number corresponding to the group ID. Each relay apparatus transfers, based on the stored IP multicast address, group ID and RTP port number, only an MBMS data stream, which is requested by the UE (150) , among MBMS data streams transmitted from a BM-SC (110) and addressed to the UE (150).
|
