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Proceedings Paper

A novel RWA scheme based on proactive contention avoidance mechanism in optical networks
Author(s): Guangjun Shan; Tianlin Dong; Guangxi Zhu
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Paper Abstract

This paper proposes a proactive contention avoidance mechanism through dedicated wavelength assignment method in the optical burst switching network. In our scheme, one or more dedicate wavelengths are assigned to each ingress node and each ingress node transmits incoming bursts to various destination with its dedicated wavelength. Therefore contention at intermediate core nodes can be avoided and contention is localized at each ingress node, in where this situation can be resolved by means of electric buffer. Furthermore, based on the status of traffic distribution, we propose a constructive scheme to construct a load-balanced spanning tree for each ingress node, where input loads are balanced appropriately among each output port of ingress node. And, identical wavelength can be shared with bursts transmitted to different destination nodes within the spanning tree. Thus our scheme has statistical multiplex gain and it expected to utilize wavelength effectively. Simulation result indicates the burst loss performance can be improved drastically without wavelength conversion comparing with those algorithms that completely shared wavelength link.

Paper Details

Date Published: 23 February 2009
PDF: 9 pages
Proc. SPIE 7278, Photonics and Optoelectronics Meetings (POEM) 2008: Fiber Optic Communication and Sensors, 727813 (23 February 2009); doi: 10.1117/12.822667
Show Author Affiliations
Guangjun Shan, Huazhong Univ. of Science and Technology (China)
Tianlin Dong, Huazhong Univ. of Science and Technology (China)
Guangxi Zhu, Huazhong Univ. of Science and Technology (China)

Published in SPIE Proceedings Vol. 7278:
Photonics and Optoelectronics Meetings (POEM) 2008: Fiber Optic Communication and Sensors
Dieter Stefan Jäger; Deming Liu; Ping Shum, Editor(s)

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