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7 October 1998 Designing an optimum WDM transport network: control architectures, node requirements, and performance
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This paper describes the development of an optical packet transport network, known as WAvelength Switched Photonic NETwork (WASPNET)--a collaboration between Strathclyde, Essex and Bristol Universities as well as BT, Fujitsu and GPT. One of its main objectives is to reduce packet contention at each node. Normally, this is resolved using node deflection routing or optical delay loops (i.e. the solution is focused at the node design strategy). However in WASPNET, this problem is considered not only as a node design problem but also as a network control and management issue. Although suitable node design can reduce packet loss performance, an appropriate network control can reduce the probability of contentions, hence, improve the network throughput and node cost. This suggests that the network management strategy also influences the node design. A possible network control methodology, the SCattered- Wavelength-Path (SCWP), has been identified to support WASPNET implementation. The paper presents some of the comparison studies that were carried out. These include comparing its limitations, control complexity, packet loss performance and buffer requirements against another technique--the Shared-Wavelength-Path. It highlights solutions to problems encountered by the SCWP. Although the studies performed were intended for WASPNET transport system, the findings are invaluable for those involved in WDM network design.
© (1998) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
M. H. Mohamed Nizam, David Kennedy Hunter, and Ivan Andonovic "Designing an optimum WDM transport network: control architectures, node requirements, and performance", Proc. SPIE 3531, All-Optical Networking: Architecture, Control, and Management Issues, (7 October 1998);


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