QoS Supported IPTV Service Architecture Over Hybrid-Tree-Based Explicit Routed Multicast Network
With the rapid advance in multimedia streaming and multicast transport technology, current IP multicast protocols, especially PIM-SM, become the major channel delivery mechanism for IPTV system over Internet. The goals for IPTV service are to provide two-way interactive services for viewers to select popular program channel with high quality for watching during fast channel surfing period. However, existing IP multicast protocol cannot meet above QoS requirements for IPTV applications between media server and subscribers. Therefore, the authors propose a cooperative scheme of hybrid-tree based on explicit routed multicast, called as HTERM to combine the advantages of shared tree and source tree for QoS-supported IPTV service.