Abstract
Design of shared backup algorithm in wavelength division multiplexed (WDM) mixed line rate (MLR) optical networks involves numerous attributes together with numerous heuristic alternatives. This study aims at identifying the pros and cons of these alternatives together with examining their performances. For this purpose, performance metrics that characterize sharing are first developed. Joint performance of shared backup metrics and other already existing network metrics is examined extensively throughout simulations. Among the strategies examined, the ones that yield best results are reported. Moreover, the topological dependence of these chosen strategies is discussed by simulations carried out on two popular characteristically different optical networks.
Highlights
With increasing number of users and increasing amount of diversifying data sharing patterns, the need for high-speed communication networks has emerged
Tunali: Comparative Study on the Effect of Strategy Selection on Shared Backup in WDM mixed line rate (MLR) Optical Networks technologies, optical networks employing wavelength division multiplexing (WDM) on fibers are suitable to support this need by the help of their high transmission capability [1]
The results show that there is a strict relation between strategy selection and resource utilization performance
Summary
With increasing number of users and increasing amount of diversifying data sharing patterns, the need for high-speed communication networks has emerged. Optical networks with MLR support offer this flexibility by routing traffic requests in cost effective manner [7], [8], [1] Their ability to choose appropriate line rate dynamically for each traffic request relaxes the network design limitations faced in SLR networks and decreases the overall transmission cost by using the volume discount [1] of high bit rate transponders. There are significant works in literature that study the factors affecting signal quality of different line rates and propose solutions to reduce the complexity of impairment aware routing problem [10]–[12]. In case where there are no available end-to-end resources, multi hop methods where more than one lightpath (sequence of sub-paths) is established for a traffic request This will increase the number of transponders used the overall cost.
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