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A best first search based optimal wavelength assignment algorithm to minimize the number of SONET ADMs in WDM rings

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4 Author(s)
Sethuraman, J. ; Indian Inst. of Manage., Calcutta, India ; Ambuj Mahanti ; Saha, D. ; Sadhukhan, S.K.

In WDM rings, determining minimum number of ADMs is NP-hard. The best known algorithm namely, breadth first least interference (BFLI) heuristic gives optimal results in only 77% cases. In this paper, we analyze the problem and suggest a new set covering formulation for minimizing the number of ADMs in WDM rings and use best first search algorithm (A*) with the help of a heuristic (hLB) to solve it optimally. We establish through experiments that the search algorithm with the heuristic function (hLB) performs better than BFLI by always giving optimal results.

Published in:

Computer Communications and Networks, 2005. ICCCN 2005. Proceedings. 14th International Conference on

Date of Conference:

17-19 Oct. 2005