Short-Term QoS Deficit Round Robin: An Efficient Scheduling Scheme for E-PON Systems

Myoung-Hun KIM  Hong-Shik PARK  

IEICE TRANSACTIONS on Communications   Vol.E88-B   No.8   pp.3321-3328
Publication Date: 2005/08/01
Online ISSN: 
DOI: 10.1093/ietcom/e88-b.8.3321
Print ISSN: 0916-8516
Type of Manuscript: PAPER
Category: Switching for Communications
E-PON,  scheduling algorithm,  QoS,  traffic management,  

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In this paper, a design alternative for guaranteeing short-term QoS in the E-PON (Ethernet-Passive Optical Network) OLT (Optical Line Terminal) node is studied. A scheduling algorithm called Short-term QoS Deficit Round Robin (SQ-DRR) is proposed to guarantee tunable deterministic QoS constraints for multimedia applications over E-PON. The major appealing aspect of the scheduler is that it guarantees delay constraint for short-term aggregate burst traffic violating pre-contracted descriptors at the same time without loosing long-term fairness. We then evaluate the scheduler performance with and without admission control scheme under non-stationary long-range dependence (LRD) traffic. The simulation results indicate that the SQ-DRR performs well in dynamic burst traffic conditions.