Limited Range Wavelength Converter Based PLI-Signal Quality RWA (PLI-SQRWA) Algorithm for Translucent Optical Wavelength Division Multiplexed (WDM) Networks

Sridhar Iyer and Shree Prakash Singh 1
  • 1 Division of ECE, Netaji Subhas Institute of Technology, Dwarka, New Delhi 110078, India


This article formulates a framework that solves the offline physical layer impairment-routing and wavelength assignment (PLI-RWA) issue in translucent wavelength division multiplexed (WDM) optical networks. For network design, the PLI-Signal Quality Aware RWA (PLI-SQARWA) algorithm is employed that (a) guarantees zero blocking due to signal degradation and wavelength contention and (b) minimizes the total required number of regenerators and all-optical wavelength converters (AOWCs). Further, in view of a latency efficient technology capable of delivering a cost effective implementation suitable for large scale deployment, our previously proposed novel electro-optical hybrid translucent nodes are deployed within the network. Unlike our previous studies which assumed the use of full range wavelength converter (FRWC) within the hybrid node, in the current study, we use limited range wavelength converter (LRWC) to resolve wavelength conflicts. For network equipped with hybrid nodes and employing PLI-SQARWA, performance results, in presence of FRWCs and LRWCs, respectively are presented.

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