Wavelength converter placement in WDM networks with non-uniform traffic

Wavelength converters in simple wavelength division multiplexed (WDM) networks helps in improving the network blocking performance by reducing the number of blocked demands arising out of the wavelength continuity constraint. However, cost and technological limitations make sparse wavelength conversion networks preferable. In this work, we propose a technique for wavelength converter placement under non-uniform traffic in the network. The algorithm that uses normalized cut based graph partitioning technique is extended for non-uniform traffic. A comparison of the performance under uniform and non-uniform traffic is given to highlight the effect of traffic on optimal placement. The algorithm is attractive due to lower complexity and efficiency.