NDLI: A Boolean satisfiability based solution to the routing and wavelength assignment problem in optical telecommunication networks

Content Provider	IEEE Xplore Digital Library
Author	Valavi, J. Saluja, N. Khatri, S.P.
Copyright Year	2005
Description	Author affiliation: Dept. of Electr. & Comput. Eng., Colorado Univ., Boulder, CO, USA (Valavi, J.; Saluja, N.)
Abstract	Wavelength division multiplexing (WDM) effectively multiplies the bandwidth of an optic fiber by transmitting data over several different wavelengths on the same fiber. WDM is widely used to handle the ever-increasing demand for bandwidth in fiber optic telecommunication networks. Routing and wavelength assignment (RWA) is a critical problem to be addressed in WDM optical telecommunication networks. The goal of RWA is to maximize throughput by optimally and simultaneously assigning routes and wavelengths for a given pattern of routing or connection requests. In this paper, we present a novel technique to solve the static RWA problem using Boolean satisfiability (SAT). After formulating the RWA problem as a SAT instance, we utilize a very efficient SAT solver to find a solution. We report results for networks with and without wavelength translation capabilities in the nodes. In both cases we obtain an assignment in significantly less than one second (which is 3-4 orders of magnitude faster than existing approaches) for a set of benchmark problems. Our technique can handle arbitrary network topologies, and, due to its efficiency, can be extended to handle dynamic RWA instances, in which the network topology, link capacities and connection requests are time-varying.
Starting Page	1802
Ending Page	1806
File Size	226796
Page Count	5
File Format	PDF
ISBN	0780389387
DOI	10.1109/ICC.2005.1494652
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2005-05-16
Publisher Place	South Korea
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Wavelength routing Wavelength assignment Optical fiber networks Wavelength division multiplexing Bandwidth Network topology Optical fibers Optical fiber communication WDM networks Throughput
Content Type	Text
Resource Type	Article

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