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Proceedings Paper

PWFQ: a priority-based weighted fair queueing algorithm for the downstream transmission of EPON
Author(s): Sunjuan Xu; Jiajun Ye; Junni Zou
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Paper Abstract

In the downstream direction of EPON, all ethernet frames share one downlink channel from the OLT to destination ONUs. To guarantee differentiated services, a scheduling algorithm is needed to solve the link-sharing issue. In this paper, we first review the classical WFQ algorithm and point out the shortcomings existing in the fair queueing principle of WFQ algorithm for EPON. Then we propose a novel scheduling algorithm called Priority-based WFQ (PWFQ) algorithm which distributes bandwidth based on priority. PWFQ algorithm can guarantee the quality of real-time services whether under light load or under heavy load. Simulation results also show that PWFQ algorithm not only can improve delay performance of real-time services, but can also meet the worst-case delay bound requirements.

Paper Details

Date Published: 6 December 2005
PDF: 5 pages
Proc. SPIE 6022, Network Architectures, Management, and Applications III, 60220V (6 December 2005); doi: 10.1117/12.634184
Show Author Affiliations
Sunjuan Xu, Shanghai Univ. (China)
Jiajun Ye, Shanghai Univ. (China)
Junni Zou, Shanghai Univ. (China)


Published in SPIE Proceedings Vol. 6022:
Network Architectures, Management, and Applications III
Kwok-wai Cheung; Gee-Kung Chang; Guangcheng Li; Ken-Ichi Sato, Editor(s)

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