| Guan Ai-hong,Wang Bo-yun.A burst segmentation-deflection routing contention resolution mechanism in OBS networks[J].Optoelectronics Letters,2012,8(1):43-47 |
| A burst segmentation-deflection routing contention resolution mechanism in OBS networks |
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| Abstract: |
| One of the key problems to hinder the realization of optical burst switching (OBS) technology in the core networks is the
losses due to the contention among the bursts at the core nodes. Burst segmentation is an effective contention resolution
technique used to reduce the number of packets lost due to the burst losses. In our work, a burst segmentation-deflection
routing contention resolution mechanism in OBS networks is proposed. When the contention occurs, the bursts are segmented
according to the lowest packet loss probability of networks firstly, and then the segmented burst is deflected on the optimum
routing. An analytical model is proposed to evaluate the contention resolution mechanism. Simulation results show that high-priority
bursts have significantly lower packet loss probability and transmission delay than the low-priority. And the performance
of the burst lengths, in which the number of segments per burst distributes geometrically, is more effective than that of
the deterministically distributed burst lengths. |
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| This work has been supported by the National Natural Science Foundation of China (No.60940017), and the Project in Natural Science Research |
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