Abstract
Most routing and wavelength assignment algorithms for all-optical networks do not consider the potential
problem of reservation confliction, which occurs when two or more reservation requests compete for the same
wavelength. Confliction can happen even if the network is only lightly loaded. In this paper, we propose a new
reservation protocol Markov-based Backward Reservation (MBR) based on Markov modeling of the network traffic on
optical links for resolving wavelength reservation confliction. Our simulations show that this new protocol can
improve network performance as measured by decreased blocking probability. The MBR algorithm works best in
small-hop-count networks with a comparatively small number of wavelengths per fiber compared to other frequently
considered algorithms.
© 2007 IEEE
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