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Proceedings Paper

QoS supporting control packet scheduling strategy in optical burst switched networks
Author(s): Jianxin Wang; Qingji Zeng; Hao Chi; Zhizhong Zhang; Shilin Xiao
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Paper Abstract

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.

Paper Details

Date Published: 8 August 2003
PDF: 8 pages
Proc. SPIE 5244, Performance and Control of Next-Generation Communications Networks, (8 August 2003); doi: 10.1117/12.509244
Show Author Affiliations
Jianxin Wang, Shanghai Jiaotong Univ. (China)
Qingji Zeng, Shanghai Jiaotong Univ. (China)
Hao Chi, Shanghai Jiaotong Univ. (China)
Zhizhong Zhang, Shanghai Jiaotong Univ. (China)
Shilin Xiao, Shanghai Jiaotong Univ. (China)

Published in SPIE Proceedings Vol. 5244:
Performance and Control of Next-Generation Communications Networks
Robert D. van der Mei; Frank Huebner, Editor(s)

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