基于层次结构的应用层多播方案

Study of Application-Layer Multicast Based on Hierarchy

研究了P2P网络的应用层组播中共享树建立的机制,提出了一种基于层次结构的应用层组播方案.该模型从逻辑上分上下两层,上层由信息节点组成的可靠分布树型覆盖网络,下层由具有各种资源的网络节点组成,采用层次结构的协议具有很好的扩展性,可以连接IP多播岛来充分利用IP多播的高效率,可以根据特定的域灵活选择相应的应用层多播协议.该模型具有较低的控制开销、较高的带宽利用率和较高的数据传输率,较好的提高多播性能.

A P2P network application layer multicast tree is studied in the sharing mechanism,and a hierarchical structure is proposed based on the application layer multicast program.The model consists of the points from the upper and lower levels of logic on the middle and lower levels of resources by the network nodes with the upper nodes from reliable information distribution tree overlay network.The lower part has a various of resources composed of network nodes.The use of hierarchical structure of the agreement possesses very good scalability and the multicast IP can connect the island to take full advantage of IP multicast efficiency,which are flexible according to specific selection domain corresponding application layer multicast protocol.The model has a lower control overhead,high bandwidth utilization and higher data transmission rate with an improved multicast performance.