NDLI: Efficient shared subconnection protection in mixed-line-rate optical WDM networks

Content Provider	IEEE Xplore Digital Library
Author	Menglin Liu Tornatore, M. Mukherjee, B.
Copyright Year	2009
Abstract	Mixed-line-rate (MLR) networks have been proposed recently to support emerging traffic demands with diverse capacity requirements. In such networks, wavelength channels of the optical paths can have a variety of capacities (10/40/100 Gbps). It has been shown that this feature enables new paradigms for protection in optical wavelength-division-multiplexing (WDM) networks. In this paper, we propose to design transparent MLR networks with shared subconnection protection (SSP). SSP in an MLR network, compared with other more classical approaches (dedicated or shared protection), can also address the cost-versus-capacity trade-off in providing shared protection in a transparent network. The design problem is solved by a two-step approach that formulates part of the problem as an integer linear program (ILP). Our results show that SSP enables higher sharing of backup capacityin an MLR network in that the design cost is up to 37% less than a single-line-rate network with SSP and around 40% less than MLR with dedicated protection.
Starting Page	1227
Ending Page	1235
Page Count	9
File Size	1373358
File Format	PDF
ISSN	19430620
Volume Number	5
Issue Number	11
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2013-01-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	OSA
Subject Keyword	Wavelength division multiplexing (WDM) Lightpath Mixed line rates Network design Optical network Shared protection Survivability Transponder cost
Content Type	Text
Resource Type	Article
Subject	Computer Networks and Communications

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