In a multicast system,the Rendezvous Point(RP)serves as the root node of the multicast tree and is responsible for introdu-cing source content into the multicast tree.RPs collect traffic in the network and can easily become a bottleneck for network perform-ance.To increase the number of multicast groups accommodated by the network(multicast capacity),more network nodes can be up-graded to serve as RPs.Compared to traditional IP multicast,ICN multicast significantly reduces the cost of managing RPs,allowing for the deployment of a large number of RPs.Therefore,this paper focuses on ICN multicast research.However,due to device upgrade costs and system stability,the number of RPs in ICN multicast still cannot be too high.Existing RP deployment methods based on the P-median model do not fully consider the load pressure between RPs,which can lead to wasted RP computing resources and overloa-ded RPs,limiting multicast capacity.Therefore,this paper proposes an infection-based RP deployment method for ICN multicast.Firstly,a multicast infection force indicator is proposed to characterize the load pressure between RPs.Secondly,based on multicast infection force,a greedy strategy-based RP deployment method is proposed.This method prioritizes upgrading nodes with lower load pressure to serve as RPs.Two sets of experiments have shown that,with the deployment of 15 RPs,this method can increase multicast capacity by 3.48 times compared to the P-median model,and when the multicast capacity reaches 9 000 groups,the number of RPs required by this method is only about 29.4％of the P-median model.
multicastrendezvous pointdeploymentmulticast capacityforce of infection
维普
万方数据
