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随着移动网络的普及与移动业务的增多,传统网络中的P2P技术开始向移动P2P发展,产生了固定节点和移动节点并存的混合P2P网络.在混合P2P网络的环境下,基于固定节点的延迟修复策略,结合用户请求数、在线移动节点数、在线固定节点数及处于修复状态的固定节点数,建立四维连续时间Markov链模型.利用矩阵几何解方法,进行系统模型的稳态分析,给出系统失效率及数据平均访问时间等性能指标的表达式.通过数值实验定量刻画固定节点个数对系统性能的影响.
With the popularization of mobile networks and the increase of mobile services, the P2P technology in the traditional networks has started to move towards P2P, resulting in a hybrid P2P network in which fixed nodes and mobile nodes coexist.In the environment of hybrid P2P networks, the delay based on fixed nodes Repair strategy, the four-dimensional continuous-time Markov chain model is established by combining the number of user requests, the number of mobile nodes, the number of online fixed nodes and the number of fixed nodes in the repaired state, and the steady state analysis of the system model is given by using the matrix geometric solution method System failure rate and average data access time, etc. The numerical experiment quantitatively describes the influence of the number of fixed nodes on the system performance.