Burst segment recombination and controllable retransmission algorithm based on priority in OBS networks
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1.
Department of Electronic and Electrical Engineering, Wenzhou Vocational and Technical College, Wenzhou 325000, China
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Received Date:
2014-01-24
Accepted Date:
2014-04-11
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Abstract
In order to decrease the byte loss probability, guarantee lower path blocking probability and reduce burst contention of optical burst switching(OBS) networks, a novel burst-segment recombination and controllable retransmission algorithm based on priority in OBS networks was proposed. When the burst contention occurred, the algorithm could divide the burst according to the quality of service, the core node would send the feedback information to the edge node and the edge node would combinate the segmentation according to the priority and retransmit the recombined burst with different probability to improve the performance of OBS networks. The design and calibration were verified by simulation results. Compared with the conventional contention control algorithms, the scheme could obviously reduce the path blocking probability and decrease the byte loss probability especially when the network was extremely busy. The study has an important reference on the improvement of OBS networks.
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