Multi-Path Routing and Wavelength Assignment (RWA) Algorithm for WDM Based Optical Networks

摘要

In optical WDM networks, transmission of information along optical lines isadvantageous since it has high transmission capacity, scalability, feasibilityand also high reliability. But large amount of information is being carried;any problem during transmission can lead to severe damage to the data beingcarried. Hence it is essential to consider the routing as well as thewavelength assignment problems and then develop a combined solution for boththe problems. In this paper, we propose to develop a routing and wavelengthassignment algorithm for selecting the suitable alternate path for the datapackets transmission. Two stages are based on the available bandwidth and thenumber of wavelength used in the link as construction of alternate paths, routeand wavelength selection. In proposed work, Adaptive Routing and First-FitWavelength Assignment (AR-FFWA) algorithm to be used. For each pair of sourceand destination, the path with the minimum granularity values are selected asthe primary path for data transmission, allocating the sufficient wavelengthand the performances will be evaluated by using ns-2 simulation models. When wecompared to existing system the overall blocking probability will be reduced totoo low.