NDLI: A Lagrangean relaxation approach to the maximizing-number-of-connection problem in WDM networks

Content Provider	IEEE Xplore Digital Library
Author	Yiming Zhang Haomei Liu
Copyright Year	2003
Description	Author affiliation: Sch. of Inf. Technol. & Eng., Ottawa Univ., Ont., Canada (Yiming Zhang; Haomei Liu)
Abstract	The emergence of WDM (wavelength-division multiplexing) technology has provided great convenience in designing a wavelength routing optical network. We study the routing and wavelength assignment (RWA) problem with the objective of maximizing the number of connections in an all-optical WDM network, where the physical topology and network resource, as well as the connection demand matrix, are given. The paper provides an effective approach with reasonable computational complexity and good performance to solve this problem. We employ a decomposition approach using Lagrangean relaxation (LR) to simplify the solution procedure. The overall problem is decomposed into semi-lightpath level subproblems for the decision of the rejection and the wavelength and route selection from source to destination. We propose the MMCSLP (modified minimum cost semi-lightpath) algorithm to solve the specific form of the subproblem. At the higher level, Lagrange multipliers are updated iteratively by a subgradient method. Also, a heuristic algorithm is proposed to generate a feasible RWA scheme based on the dual solution. The performance of this approach on sample networks is compared with other recently proposed methods. The optimization results indicate that our algorithm can achieve a very good near-optimum solution, and it shows a great advantage in computational complexity.
Sponsorship	IEEE Commun. Soc
Starting Page	23
Ending Page	28
File Size	611446
Page Count	6
File Format	PDF
ISBN	0780377109
DOI	10.1109/HPSR.2003.1226675
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2003-06-27
Publisher Place	Italy
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Lagrangian functions WDM networks Iterative algorithms Wavelength division multiplexing Wavelength routing Computational complexity Optical design Optical fiber networks Wavelength assignment Network topology
Content Type	Text
Resource Type	Article

Sl.	Authority	Responsibilities	Communication Details
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
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

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