Abstract
Verlag-As the trend of increased reconfigurability emerges in wavelength division multiplexing (WDM) networks, lightpath establishment would move from static toward dynamic regimes. Therefore, our interest is in real-time traffic where connection requests arrive dynamically and last for a random holding time if granted. This paper concerns itself with the performance of adaptive routing algorithms in wavelength-routed optical networks with wavelength conversion capability. We first investigate several adaptive routing strategies, including the shortest path strategy, the least-loaded path strategy, and the proposed weighted-shortest path strategy. Then we develop an analytical model to estimate blocking performance and compare the analyses with simulations. The main performance measures that we are interested in are the blocking probability, the average number of hops per connection, and the standard deviation of link utilization. Numerical results show dim the weighted-shortest path strategy can enhance the blocking performance and fairly distribute load among the links