Enhancement of blocking performance in all-optical WDM networks via wavelength reassignment and route deviation

Authors:
Wissam F. Fawaz
Affiliations:
Lebanese American University, Electrical and Computer Engineering Department, Byblos, Lebanon
Venue:
Computer Communications
Year:
2012

Citing 7
Cited 0

Effects of wavelength routing and selection algorithms on wavelength conversion gain in WDM optical networks

IEEE/ACM Transactions on Networking (TON)
Analysis of rerouting in circuit-switched networks

IEEE/ACM Transactions on Networking (TON)
A Tutorial on Optical Networks

Advanced Lectures on Networking, NETWORKING 2002 [This book presents the revised version of seven tutorials given at the NETWORKING 2002 Conference in Pisa, Italy in May 2002]
Dynamic routing and wavelength assignment in the presence of wavelength conversion for all-optical networks

IEEE/ACM Transactions on Networking (TON)
Wavelength reassignment algorithms for all-optical WDM backbone networks

Optical Switching and Networking
A taxonomy of rerouting in circuit-switched networks

IEEE Communications Magazine
Computing approximate blocking probabilities in wavelength routed all-optical networks with limited-range wavelength conversion

IEEE Journal on Selected Areas in Communications

Quantified Score

Hi-index	0.24

Visualization

Abstract

This paper deals with the problem of improving the performance of all-optical Wavelength Division Multiplexing (WDM) networks in terms of blocking probability. Blocking in such network architecture is caused mainly by the so-called wavelength continuity constraint (wcc), which requires a provisioned lightpath to occupy the same wavelength on all the links along its route. To alleviate the effect of wcc on the blocking performance, a rerouting strategy is proposed. The main idea behind this strategy lies in ensuring the creation of wavelength-continuous routes for the connections that are blocked due to wcc. Particularly, the proposed rerouting strategy is built upon two main pillars, namely wavelength reassignment and route deviation. The former strives to keep the physical route followed by the lightpath intact, while the latter changes the route of the lightpath when wavelength reassignment proves to be ineffective. The performance of the rerouting strategy is studied through extensive simulations in the context of networks employing the least congested path (LCP) routing algorithm and the first-fit (FF) wavelength assignment strategy. The reported results show that the proposed rerouting strategy can guarantee significant enhancement in terms of blocking probability while achieving near-optimal performance for networks utilizing a small number of wavelengths per fiber.