Performance Analysis of Optical WDM Networks

Abstract

An optical network provides a common infrastructure over which a verity of services can be delivered. These networks are also capable of delivering bandwidth in a flexible manner, supports capacity up gradation and transparency in data transmission. It consists of optical source (LED, LASER) as transmitter and optical fibre as transmission medium with other
connectors and photo detector, receiver set. But due to limitation of electronic processing speed, it’s not possible to use all the BW of an optical fibre using a single high capacity channel or wavelength.
The primary problem in a WDM network design is to find the best possible path between a source-destination node pair and assign available wavelength to this path for data
transmission. To determine the best path a series of measurements are performed which are known as performance matrices. From these performance matrices, the Quality of Service parameters are determined. Here we have designed four different network topologies having different number of nodes, but each having equal capacity. We have simulated all these networks with different scenario to obtain the performance matrices. Then we have compared
those performance matrices to suggest which network is be st under the present case..