물리계층 Multicast switch를 이용한 IP-TV 방송 서비스 방법
- 7675870 (2010.03.09)
- An Internet Protocol Television (IP-TV) broadcasting service system and method using a physical layer multicast switch are provided. The system comprises: a head end which converts an Ethernet signal to a virtual concatenation group (VCG) signal of a synchronous digital hierarchy/synchronous optical network (SDH/SONET); a multicast switch which multicasts the VCG signal in a physical layer; and a tail end which receives the multicasted VCG signal through a Synchronous Transmission Module level n (STM-N) optical link and restores the VCG signal to the Ethernet signal. Therefore, high quality TV broadcasting can be provided in an IP multicast network.
- KSP 제안 키워드
- IP multicast, Internet Protocol Television(IPTV), Internet protocol(IP), Optical network, Physical Layer, Service System, Synchronous Digital Hierarchy, Synchronous optical network, TV broadcasting, Virtual concatenation, multicast network, optical link