WSEAS Transactions on Communications
Print ISSN: 1109-2742, E-ISSN: 2224-2864
Volume 11, 2012
A Novel QoS Aware RWA with Dedicated Path Protection Consideration for All Optical Networks
Authors: ,
Abstract: In all optical networks, signals has to travel over long distances and physical layer impairments (PLI) accumulate as regeneration capability is not available. During transmission, Quality of Service (QoS) of signals as measured by their Bit Error Rates (BER) is degraded due to propagation in the fibers, amplifier noise, and crosstalk between channels arising from the switches and demultiplexers which cannot be removed at the physical layer. It is possible to mitigate physical layer effects at the network layer using appropriate QoS aware Routing and Wavelength Assignment (RWA) algorithms. There are only few Offline RWA algorithms that consider dedicated path protection. In this paper an offline RWA Scheme called WpDp-MaMiQ is presented with dedicated path protection consideration that mitigates PLI. Simulations show that the proposed algorithm performs better in terms of blocking rate and BER.
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Keywords: Routing and Wavelength Assignment (RWA), Physical layer impairments, Optical networks, Dedicated path protection, Cross talk, QoS aware, Blocking probability