NDLI: Group shared protection (GSP): a scalable solution for spare capacity reconfiguration in mesh WDM networks

Content Provider	IEEE Xplore Digital Library
Author	Haque, A. Pin-Han Ho Boutaba, R. Ho, J.
Copyright Year	2004
Description	Author affiliation: Sch. of Comput. Sci., Univ. of Waterloo, Ont., Canada (Haque, A.; Pin-Han Ho; Boutaba, R.)
Abstract	This paper proposes a novel framework of shared protection, namely group shared protection (GSP), in mesh wavelength division multiplexing (WDM) networks with dynamically arriving connection requests. Based on the (M:N)/sup n/ control architecture, GSP has n mutually independent protection groups, each of which contains N SRLG-disjoint working paths protected by M protection paths. Due to the SRLG-disjointedness of the working paths in each protection group, GSP not only allows the spare capacity to be totally sharable among the corresponding working paths, but also reduces the number of working paths affected due to a single link failure. Based on the framework, an integer linear program (ILP) formulation that can optimally reconfigure the spare capacity for a specific protection group whenever a working-protection path-pair joins is proposed. Two heuristics namely link-shared protection (LSP) and ring-shared protection (RSP) are introduced for further compromising the performance and the computational complexity. The proposed schemes are compared with a reported one, namely successive survivable routing (SSR). The experimental results show that LSP, RSP and SSR yield similar performance in terms of resource sharing, whereas ILP outperforms all of them by (6-16%). Due to the limited number of working paths in each protection group, ILP can handle a dynamically arriving connection request in a reasonable amount of time. Also, we find that the number of affected working paths in GSP is about half of that in SSR. We conclude that GSP provides a scalable and efficient solution for dynamic spare capacity reconfiguration following the (M:N)/sup n/ control architecture.
Starting Page	2029
Ending Page	2035
File Size	701614
Page Count	7
File Format	PDF
ISBN	0780387945
DOI	10.1109/GLOCOM.2004.1378350
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2004-11-29
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Protection Intelligent networks WDM networks Wavelength division multiplexing Routing Time sharing computer systems Computer science Computer architecture Resource management IP networks
Content Type	Text
Resource Type	Article

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