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Network Architectures Research

WR-OBS architecture
In the area of optical network architectures our research focuses on various aspects of wavelength routing and wavelength allocation in static and dynamic optical networks, including WRONs (wavelength-routed optical networks) and WR-OBS (wavelength-routed optically burst switched) networks.

In the quasi-static (traffic demand changes slowly) WRON architecture a wavelength is assigned to a source-destination pair and the question relates to the number of wavelength that is necessary to interconnect an arbitrary mesh network. We have made significant contributions in answering this question, and in particularly, in identifying the bounds on the minimum number of wavelengths required and helped explain why wavelength conversion does not reduce the number of wavelengths [1] .

Whilst WRONs are relatively easy to analyse and design, one could argue that these networks are not able to respond to rapidly varying traffic demands and our current research is focused on the analysis and design of dynamic networks, including the WR-OBS architecture, proposed in [2], scheduling, service differentiation, burst aggregation and control as well as experimental implementation of these networks using fast-tunable lasers.

[1] S. Baroni, P. Bayvel, "Wavelengths requirements in arbitrarily connected wavelength-routed optical networks", IEEE J. of Lightwave Techn., Vol. 15, No.2, 242-251 (1997).
[2] M. Dueser, P. Bayvel,"Analysis of a dynamically wavelength-routed optical burst-switched network architecture", IEEE J. of Lightwave Techn., Vol.20, No.4, 574-585 (2002).

To see the the full list of ONG papers in this area, please click here.