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分析了网络传输损伤、网络元件可靠性、链路带宽分布等因素对光网络中业务丢包率的影响,给出了一种计算在区分业务等级的网络中不同等级业务丢包率的计算方法。然后用该计算方法对CERNET拓扑结构采用最短路径路由算法的网络,在不同网络带宽分配和两种不同流量模型的情况下进行了计算。最后根据计算结果对不同服务等级业务丢包率的各种影响因素进行了比较分析。
The impact of network transmission impairments, network element reliability and link bandwidth distribution on service packet loss rate in optical networks is analyzed. A calculation method for calculating the packet loss rate of different levels of services in a network that differentiates service levels is given . Then using this method to calculate the CERNET topology using the shortest path routing algorithm, the network is calculated under different network bandwidth allocation and two different traffic models. Finally, according to the result of calculation, the various influencing factors of packet loss rate of different service levels are compared and analyzed.