关键词: 网络编码, 组播容量, 组播延迟, 组播传输速率

Abstract: From magnifying multicast capacity and reducing multicast delay, this paper proposes a centralized network coding cycle augmented multicast routing algorithm (NCCA) to further improve the transmission rate of multicast communication. Firstly, each node traverses the link state packets to get the topology information of the network by breadth first search (BFS) algorithm. Then, each sink node augments routing set by using Dijkstra algorithm and selects the optimal routing set. Finally, the routing sets of all sink nodes are combined to get the entirety routing of multicast group. The theoretical analysis and simulation results show that the NCCA multicast routing    algorithm can further improve the transmission rate of multicast communication in a stable network.

Key words: network coding, multicast capacity, multicast delay, multicast transmission rate