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8 August 2003 QoS supporting control packet scheduling strategy in optical burst switched networks
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In Optical Burst Switched (OBS) networks, the requirements on packet loss probability vary for different class users. In order to meet different packet loss probability demands, besides the traditional methods to support Differentiated services (DiffServ) by resource allocation and contention resolution, the scheduling of control packets should also support DiffServ. A new type of scheduling strategy, Priority-based Weight Fair Queuing (PWFQ) scheduling strategy, is proposed. An equivalent analysis model is also presented to simplify the solving process of scheduling weight of each class. We also define a parameter, normalized deviation factor, to evaluate the validity of our analysis model as well as the fairness of scheduling strategy on supporting DiffServ. Numerical results confirm that, it is feasible to analyze queue system, in which PWFQ scheduling strategy is adopted, with our equivalent model. At the same time, it confirms that our scheduling strategy performs well on providing fair DiffServ in terms of packet loss probability.
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Jianxin Wang, Qingji Zeng, Hao Chi, Zhizhong Zhang, and Shilin Xiao "QoS supporting control packet scheduling strategy in optical burst switched networks", Proc. SPIE 5244, Performance and Control of Next-Generation Communications Networks, (8 August 2003);

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