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In survivable optical WDM networks, wavelength assignment is a major concern than assigning routes to the light paths. Earlier wavelength assignment algorithm suffers from unbalanced utilization of wavelength that leads to blocking probability for any connection request. In this paper, the authors analyze various wavelength heuristics and how to minimize the blocking probability of the connection requests considerably. Simulation results indicate that the round robin wavelength algorithm achieves reduced network block rate and delay with increased bandwidth utilization and throughput.
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