关键词: 应用层多播 可靠多播 分层

Abstract:

In this paper we put forward a reliable data transmission algorithm based on hierarchical application layer multicast, which mainly consists of loss detection, application buffer, and also combines with a hierarchical data naming scheme SNAP. Loss detection adopts a hierarchical local recovery method    based on NAK, and the application buffer not only solves the limited buffer capacity problem because of NAK, but also advances the throughput under the  different transfer rates in the net. At last we model the algorithm with OPNET, analyze and compare it with other methods.

Key words: application layer muhicast, reliable muhicast, hierarchical