Research on Shortest Path Tree Algorithm for Multicast Routing

With the development of computer technology and network technology, the network bandwidth consumption and congestion become more and more serious. IP multicast is the best way to achieve this kind of communication. The key of realizing multicast communication is to implement the multicast routing algorithm, namely how to build a simple, effective and robust multicast routing tree. This paper proposes a low-cost multicast routing algorithm based on the path node driven idea, which reduces the cost of multicast tree mainly by sharing links. Correctness and performance of the algorithm were analyzed in theory. Experiments were simulated in different aspects. The algorithm can not only generate a SPT correctly, but also have the best optimization performance by comparing with other SPT algorithm.