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A Differentiated Optical Services Model for WDM Networks



Nada T. Golmie, T D. Ndousse, David H. Su


This paper addresses the issues of guaranteed and scalable end-to-end QoS in Metropolitan DWDM networks serving as transit networks for IP access networks. DWDM offering few wavelengths have in the past been deployed in the backbone network to upgrade point-to-point transmission where sharing is based on coarse granularity. This type of DWDM backbone networks offering few lightpaths, provides no support for QoS services traversing the network. As DWDM networks with larger numbers of wavelengths penetrate the data-centric Metro environment, specific IP service requirements such as priority restoration, scalability, dynamic provisioning of capacity and routes, and support for coarse-grain QoS capabilities will have to be addressed in the optical domain in order to support end-to-end QoS over a DWDM network. We propose a QoS service model in the optical domain called Differentiated Optical Services (DoS). Service classification in DoS is based on a set of optical parameters that captures the quality and reliability of the optical lightpath.
IEEE Communications Magazine
No. 2


QOS, quality of optical service, service provisioning, wavelength division multiplexing


Golmie, N. , Ndousse, T. and Su, D. (2000), A Differentiated Optical Services Model for WDM Networks, IEEE Communications Magazine, [online], (Accessed April 17, 2024)
Created February 1, 2000, Updated February 19, 2017