Efficient Fault-Tolerant Routing in Multihop Optical WDM Networks
IEEE Transactions on Parallel and Distributed Systems
Multicast in large WDM networks
Progress in computer research
Efficient Lightpath Routing in Wavelength-Routed Optical Networks
ICOIN '02 Revised Papers from the International Conference on Information Networking, Wireless Communications Technologies and Network Applications-Part I
Multicasting and Broadcasting in Large WDM Networks
IPPS '98 Proceedings of the 12th. International Parallel Processing Symposium on International Parallel Processing Symposium
Finding multiple routing paths in wide-area WDM networks
Computer Communications
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We address the problem of efficient circuit switching in wide area networks. The solution provided is based on finding optimal routes for lightpaths and semilightpaths. A lightpath is a fully optical transmission path, while a semilightpath is a transmission path constructed by chaining several lightpaths together, using wavelength conversion at their junctions. The problem thus is to find an optimal lightpath/semilightpath in the network in terms of the cost of wavelength conversion and the cost of using the wavelengths on links. We first present fast, efficient algorithms both for the general problem and for a natural restricted version. The new algorithms outperform earlier work, providing time improvements amounting to an almost linear time factor in most cases. Also, all our algorithms can be implemented on the network in a distributed way.