Routing and wavelength assignment in all-optical networks
IEEE/ACM Transactions on Networking (TON)
Adaptive wavelength routing in all-optical networks
IEEE/ACM Transactions on Networking (TON)
Computer Networks: The International Journal of Computer and Telecommunications Networking
Impairment aware based routing and wavelength assignment in transparent long haul networks
ONDM'07 Proceedings of the 11th international IFIP TC6 conference on Optical network design and modeling
Performance engineering of metropolitan area optical networks through impairment constraint routing
IEEE Communications Magazine
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In transparent optical networks with no regeneration, the problem of capacity allocation to traffic demands is called "Routing and Wavelength Assignment". Much work on this topic recently has focused on the dynamic case, whereby demands arrive and must be served in real-time. In addition, due to lack of regeneration, physical impairments accumulate as light propagates and QoT may become inappropriate (e.g., too high Bit Error Rate). Considering the physical layer impairments in the network planning phase gives rise to a class of RWA algorithms: offline Physical Layer Impairment Aware- (PLIA-)RWA. This paper makes a survey of such algorithms, proposes a taxonomy, and a comparison between these algorithms for common metrics. We also propose a novel offline PLIA-RWA algorithm, called POLIO-RWA, and show through simulations that it decreases blocking rate compared with other PLIA-RWA algorithms.