Construction and Simulation of Failure Models in IP Network Survivability Model
The problem of failure model construction was studied to optimize the evaluation method of IP network survivability.The evaluation frame of network survivability was introduced,the characteristics of IP network failures were analyzed,analyzed the traits of failures,the influence of failures to IP network survivability and the classification of failures,on the basis of understanding the characteristics of IP network failures,the mathematical expressions of failure state aggregations were provided,the failure state were single link failure,router related failure and fiber related failure,and the constructing methods of two failure models were also provided,respectively at the situation of foreknowing the percent of every failure to all failures and foreknowing the statistical distributions of the failure′s arriving intervals.The simulation results show that two kinds of failure models could accurately simulate the real failure states.