PWFQ: a priority-based weighted fair queueing algorithm for the downstream transmission of EPON

Sunjuan Xu; Jiajun Ye; Junni Zou

doi:10.1117/12.634184

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5 December 2005 PWFQ: a priority-based weighted fair queueing algorithm for the downstream transmission of EPON

Sunjuan Xu; Jiajun Ye; Junni Zou

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Proceedings Volume 6022, Network Architectures, Management, and Applications III; 60220V (2005) https://doi.org/10.1117/12.634184
Event: Asia-Pacific Optical Communications, 2005, Shanghai, China

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.

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Sunjuan Xu, Jiajun Ye, and Junni Zou "PWFQ: a priority-based weighted fair queueing algorithm for the downstream transmission of EPON", Proc. SPIE 6022, Network Architectures, Management, and Applications III, 60220V (5 December 2005); https://doi.org/10.1117/12.634184

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