Optimize the Deployment and Integration for Multicast-Oriented Virtual Network Function Tree

Due to the development of network technology, the number of users is increasing rapidly, and the demand for emerging multicast services is becoming more and more abundant, traffic data is increasing day by day, network nodes are becoming denser, network topology is becoming more complex, and operators ’ equipment operation and maintenance costs are increasing. Network func-tions virtualization multicast issues include building a traffic forwarding topology, deploying the required functions, and directing traffic. Combining the two is still a problem to be studied in depth at present, and this paper proposes a two-stage solution where the decisions of these two stages are interdependent. Specifically, this paper decouples multicast traffic forwarding and function delivery. The minimum spanning tree of traffic forwarding is constructed by Steiner tree, and the traffic for-warding is realized by Viterbi-algorithm. Use a general topology network to examine network cost and service performance. Simulation results show that this method can reduce overhead and delay and optimize user experience.