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Optical Network Design with Optical Constraints in IP/WDM Networks
Kwangil LEE Mark A. SHAYMAN
Publication
IEICE TRANSACTIONS on Communications
Vol.E88-B
No.5
pp.1898-1905 Publication Date: 2005/05/01 Online ISSN:
DOI: 10.1093/ietcom/e88-b.5.1898 Print ISSN: 0916-8516 Type of Manuscript: Special Section PAPER (Joint Special Section on Recent Progress in Optoelectronics and Communications) Category: Optical Network Architecture Keyword: logical topology, traffic grooming, optical impairments, interface constraints, resource efficiency factor,
Full Text: PDF(512KB)>>
Summary:
In this paper we consider algorithms for the logical topology design and traffic grooming problem in WDM networks with router interface constraints as well as optical constraints. The optical constraints include restricted transmission range due to optical impairments as well as limits on the number of available wavelengths. We formulate this problem as an integer linear program which is NP-complete. We then introduce heuristic algorithms which use a graphical modeling tool called the Virtual Neighbor Graph and add lightpaths sequentially. The best performing heuristic uses a so-called Resource Efficiency Factor to determine the order in which paths are provisioned for the traffic demands. By giving priority to demands that can be routed over paths that make efficient use of network resources, it is able to achieve good performance both in terms of weighted hop count and network throughput. For finding optimal multi-hop paths sequentially, we introduce interface constraint shortest path problem and solve it using minimum weight perfect matching.
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