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针对当前移动网络下组播系统的构建方案进行了相关分析,提出一种基于设施的移动应用层组播系统的构建方案.该方案结合NICE协议的思想完成组播树的构建及其维护工作,同时为了保证所提出的构建方案具有较好的稳定性,本文还对NICE协议进行了相关的改进.根据文中所提出的算法,在组播节点出现故障时能够进行快速的故障恢复,从而弥补移动网络下组播节点高度动态性的缺点.最后在OVERSIM框架下模拟移动环境并在此基础下进行仿真实验.实验结果证明了本文所提出的组播系统组播树的构建方案具有可行性.
Aiming at the construction of multicast system under current mobile network, the paper proposes a construction scheme of mobile application layer multicast system based on facilities.This scheme completes the construction of multicast tree and its maintenance according to the idea of NICE protocol, At the same time, in order to ensure the stability of the proposed construction scheme, this paper also makes some improvements on the NICE protocol.According to the algorithm proposed in this paper, when the multicast node fails, it can make rapid fault recovery, so as to make up for the mobile The disadvantage of multicast nodes under the network is highly dynamic.Finally, simulation environment is simulated under OVERSIM framework and simulation experiments are carried out on this basis.Experimental results show that the proposed multicast tree multicast tree construction scheme is feasible.