Wavelength assignment algorithms for wavelength division multiplexing optical networks

Abstract

The rapid growth of internet traffic has been the driving force for faster and more reliable data communication networks. The Wavelength Division Multiplexing (WDM) technique is considered to be one of the best possible techniques in optical network to enhance the capacity of optical fiber in next-generation networks. Wavelength assignment problems are major problems of WDM networks. Therefore, a comprehensive solution on the issues encountered in optical WDM networks needs to be evaluated and resolved using wavelength assignment. This study proposes novel wavelength assignment algorithms in WDM optical networks. The proposed wavelength assignment algorithms are improved first-fit (IFF) algorithm, improved random (IRAND) algorithm and a hybrid algorithm. The uniqueness that IFF possesses is the insertion sort function that assembles wavelengths from the smallest index to the highest. IRAND on the other hand is explored through the link utilization of the path in the network. The hybrid algorithm infuses the concepts of IFF and !RAND. The simulation results are based on OPNET modeler 14.5. This novel algorithm, hybrid, is more efficient in terms of the performance metrics, throughput, delay and utilization.