Performance Analysis of Mixed Line Rate Optical WDM Networks under Link Failure

Due to heterogeneous traffic in next generation Mixed Line Rate (MLR) networks are capable of delivering different bandwidth in a flexible manner. In this paper a simple routing algorithm is proposed to study the case of any link failure in MLR WDM networks. Here Poisson random traffic is used as a dynamic traffic for 24-hour duration. The proposed work can be achieved by deleting the failed link and then finding the new best possible shortest path between source and destination node. According to the traffic load light paths adjustments employ the addition of light paths under congestion and deletion of lightpaths which are not being used at a particular time. Simulation result shows the total number of lightpaths used, total number of addition and deletion of light paths under link safe and link failure case in mixed line rate (MLR) and single line rate (SLR) optical WDM networks