Routing Algorithms for Packet/Circuit Switching in Optical Multi-log2N Networks

Abstract

SUMMARYThe multi-log 2 N network architecture is attractive for constructing optical switches, and the related routing algorithms are critical for the operation and efficiency of such switches. Although several routing algorithms have been proposed for multi-log 2 N networks, a full performance comparison among them has not been published up to now. Thus, we rectify this omission by providing such a comparison in terms of blocking probability, time complexity, hardware cost and load balancing capability. Notice that the load balance is important for reducing the peak power requirement of a switch, so we also propose in this paper a new routing algorithm for optical multi-log 2 N networks to achieve a better load balance. key words: optical switch networks, multi-log 2 N networks, log 2 N networks, directional coupler, blocking network