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

TL;DR

This paper introduces an adaptive routing and wavelength assignment algorithm for WDM optical networks that reduces blocking probability by selecting optimal paths based on bandwidth and wavelength availability, improving transmission reliability.

Contribution

It proposes a novel two-stage AR-FFWA algorithm for joint routing and wavelength assignment, enhancing performance over existing methods.

Findings

Reduced blocking probability compared to existing systems

Effective path selection based on minimum granularity values

Improved network reliability and transmission efficiency

Abstract

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