Mr. Guangjun Shan Profile

Guangjun Shan

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Proceedings Article | 23 February 2009 Paper

A novel RWA scheme based on proactive contention avoidance mechanism in optical networks

Guangjun Shan, Tianlin Dong, Guangxi Zhu

Proceedings Volume 7278, 727813 (2009) https://doi.org/10.1117/12.822667

KEYWORDS: Optical networks, Switching, Computer simulations, Electronics, Dense wavelength division multiplexing, Chemical elements, Process control, Electronics engineering, Packet switching, Lead

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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.

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