Jin-Hee Lee, Tae-Jin Lee, Min-Young Chung, You-Ho Lee, Hyun-Seung Choo, Journal of Internet Computing and Services, Vol. 9, No. 4, pp. 61-68, Aug. 2008
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Keywords: Ethenet Passive Optical Network (EPON), Dynamic bandwidth allocation (DBA), Maximum window size

Abstract

Ethernet passive optical network (EPON) is the next-generation technology mitigating the bottleneck between high-capacity local area networks (LANs) and a backbone network. The bottleneck is aggrevated depending on burstiness and long range dependence (LRD) of traffic characteristics as well as amount of outgoing traffic from the high-capacity LANs. The proposed scheme decreases average packet delay for data upstreaming by considering such traffic characteristics to dynamically allocate bandwidth to multiple optical network units (ONUs). In addition, it can appropriately support delay-sensitive traffic such as constant bit ratio (CBR) traffic by making maximum cycle time fix regardless of the number of ONUs. The comprehensive simulation results indicate that the proposed scheme acheives up to 77% and 82% lower than previous schemes in terms of average packet delay and average queue size while it limits the maximum cycle time to twice of the basic cycle time.

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