Abstract
We propose a new routing and wavelength assignment scheme that improves the blocking probability of WDM networks and offers a very good utilizat ion of the networks resources. This heuristic results in high quality of service, prioritization of the LAN networks and lower installat ion costs compared with the traditional RWA algorith ms applied in WDM networks. It is based on the distributed Dijkstra sparse placement routing algorithm, first-fit wavelength reservation and traffic mu ltip lexing. We apply load balancing and a sparse electronic switch placement algorithm during the process of finding the optimal lightpath in order to reduce the number of dropped lightpath sessions to zero, min imize the number of opaque nodes and maximize the utilization of the network.
Highlights
New customer-oriented applications and triple p lay services are rapidly pushing the development of telecommun ications
The future of optical W DM networks are all-optical networks, where the lightpath is routed from the source node to the destination node without undergoing optical-electrical-optical (O/ E/O) conversion at any intermediate node, which means that the signal remains in the optical doma in
We propose an efficient routing and wavelength assignment heuristic, which at the same time, min imizes the blocking probability of lightpaths in the WDM network and selects the route for a given physical topology in such a manner that all t raffic is evenly balanced between all network resources
Summary
New customer-oriented applications and triple p lay services are rapidly pushing the development of telecommun ications. A WDM optical network consists of nodes interconnected by optical fibers, wh ich transfer optical signals at different wavelengths, the so-called lightpaths These networks are deployed main ly as backbone networks for nationwide or g lobal coverage. We propose an efficient routing and wavelength assignment heuristic, which at the same time, min imizes the blocking probability of lightpaths in the WDM network and selects the route for a given physical topology in such a manner that all t raffic is evenly balanced between all network resources. This is the first research work in investigating routing and wavelength assignment for optical WDM networks together, which optimizes quality of service and capital expenditure of networks based on the distributed Dijkstra sparse placement routing algorith m, first-fit wavelength reservation and traffic mu ltip lexing.
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