NDLI: RWA in WDM rings: An efficient formulation based on maximal independent set decomposition

Content Provider	IEEE Xplore Digital Library
Author	Yetginer, E. Zeyu Liu Rouskas, G.N.
Copyright Year	2010
Description	Author affiliation: Department of Computer Science, North Carolina State University, Raleigh, 27695-8206 USA (Zeyu Liu; Rouskas, G.N.) \|\| Tubitak UEKAE, Ilhan Tan Kislasi, Umitkoy, Ankara 06800 Turkey (Yetginer, E.)
Abstract	WDM rings are now capable of supporting more than 100 wavelengths over a single fiber. Conventional link and path formulations for the RWA problem are inefficient due to the inherent symmetry in wavelength assignment and the fact that the problem size increases fast with the number of wavelengths. Although a formulation based on maximal independent sets (MIS) does not have these drawbacks, it suffers from the exponential growth in the number of variables with the increasing network size. We develop a new ILP formulation based on the idea of partitioning the path set and representing the maximal independent sets in the original network using the independent sets calculated in each of these partitions. This formulation trades off the number of variables with the number of constraints and, as a result, achieves a much better scalability in terms of network dimension. The proposed approach is compared with existing formulations on ring networks of various sizes and it is demonstrated that the new formulation achieves more than two orders of magnitude decrease in running time, making it possible to (1) solve optimally large network instances for any number of wavelengths, which cannot be solved with classical formulations, and (2) perform extensive “what-if” analysis to evaluate the sensitivity of the optimal solutions to uncertainties in forecast traffic scenarios.
Starting Page	1
Ending Page	7
File Size	1176058
Page Count	7
File Format	PDF
ISBN	9781424460670
ISSN	19440375
e-ISBN	9781424460694
DOI	10.1109/LANMAN.2010.5507142
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2010-05-05
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Wavelength division multiplexing Geographic Information Systems Ecosystems Information analysis Power generation economics Environmental economics Information systems Spatial databases Sustainable development Cities and towns
Content Type	Text
Resource Type	Article

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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