Abstract-This paper addresses the problem of routing and wavelength assignment (RWA) of scheduled lightpath demands (SLDs) in wavelength routed optical networks with no wavelength converters. The objective is to minimize the number of wavelengths used. This problem has been shown to be NPcomplete so heuristic algorithms have been developed to solve it suboptimally. Suggested is a tabu search algorithm along with two simple and fast greedy algorithms for the RWA SLD problem. We compare the proposed algorithms with an existing tabu search algorithm for the same problem and with lower bounds derived in this paper. Results indicate that the suggested algorithms not only yield solutions superior in quality to those obtained by the existing algorithm, but have drastically shorter execution times. Index Terms-Routing and wavelength assignment, scheduled lightpath demands, optical networks, tabu search.
An enhanced Tabu Search algorithm and efficient greedy algorithms for the same problem were proposed in REF .
Heuristic algorithms for the routing and wavelength assignment of scheduled lightpath demands in optical networks
IEEE Journal on Selected Areas in Communications
IEEE Journal on Selected Areas in Communications
Computer Science