Burst-Polling-Based Dynamic Bandwidth Allocation Using Adaptive Minimum Guaranteed Bandwidth for EPONs

Wansu Lim; Changho Yun; Yeon-Mo Yang; Hyunju Lee; Kiseon Kim

doi:10.1364/JOCN.1.000594

Journal of Optical Communications and Networking
Vol. 1,
Issue 7,
pp. 594-599
(2009)
•https://doi.org/10.1364/JOCN.1.000594

Burst-Polling-Based Dynamic Bandwidth Allocation Using Adaptive Minimum Guaranteed Bandwidth for EPONs

Wansu Lim, Changho Yun, Yeon-Mo Yang, Hyunju Lee, and Kiseon Kim

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Wansu Lim, Changho Yun, Yeon-Mo Yang, Hyunju Lee, and Kiseon Kim, "Burst-Polling-Based Dynamic Bandwidth Allocation Using Adaptive Minimum Guaranteed Bandwidth for EPONs," J. Opt. Commun. Netw. 1, 594-599 (2009)

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Abstract

The enhanced burst-polling dynamic bandwidth allocation (EBDBA) method is proposed to support broadband access networks based on quality of service for Ethernet passive optical networks (EPONs). EBDBA adaptively increases or decreases the minimum guaranteed bandwidth of the three traffic clasess—expedited forwarding (EF), assured forwarding (AF), and best effort (BE) traffic—according to the requested bandwidth of an optical network unit. Therefore, network resources are efficiently utilized and adaptively allocated to the three traffic classes for unbalanced traffic conditions. Simulation results using OPNET show that EBDBA outperforms conventional bandwidth allocation schemes in terms of the average packet delay (it decreases the maximum performance range to 68%) and the network throughput (it increases the maximum performance range to 20%) at a given offered load of 1.2.

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DBA	Polling Scheme	Sharing Surplus Bandwidth	Ingress–Egress Queue	Minimum Guaranteed Bandwidth	Time Complexity	Comments
IPACT [3]	IPACT	Single ONU	Do not use	Do not use	$O (N)$	–Unsuitable for delay and jitter-sensitive service –Wastes downstream time because of frequent gating on small-sized packets
ADBA [4]	Non-IPACT polling	Whole ONU	Do not use (ToS)	Fixed	$O (3 N)$	–Minimizing packet delay in the EF traffic class –Higher-priority traffic may be transmitted later than lower-priority traffic
SDBA [5]	Non-IPACT polling	Whole ONU	Do not use (ToS)	Fixed	$O (3 N)$	–Essentially excludes potential overgranting to ensure higher bandwidth utilization
YDBA [6]	Burst polling	Delta scheduling	Use (ToS/CoS)	Fixed	$O (5 N)$	–Supporting intra-ONU priority scheduling –Possible to design more sophisticated DBA with burst polling
EBDBA	Burst polling	Whole ONU	Use (ToS/CoS)	Variable	$O (5 N)$	–Maximizing the network throughput for the AF and EF packets –Minimizing the average packet delay to the EF packet

DBA	Polling Scheme	Sharing Surplus Bandwidth	Ingress–Egress Queue	Minimum Guaranteed Bandwidth	Time Complexity	Comments
IPACT [3]	IPACT	Single ONU	Do not use	Do not use	$O (N)$	–Unsuitable for delay and jitter-sensitive service –Wastes downstream time because of frequent gating on small-sized packets
ADBA [4]	Non-IPACT polling	Whole ONU	Do not use (ToS)	Fixed	$O (3 N)$	–Minimizing packet delay in the EF traffic class –Higher-priority traffic may be transmitted later than lower-priority traffic
SDBA [5]	Non-IPACT polling	Whole ONU	Do not use (ToS)	Fixed	$O (3 N)$	–Essentially excludes potential overgranting to ensure higher bandwidth utilization
YDBA [6]	Burst polling	Delta scheduling	Use (ToS/CoS)	Fixed	$O (5 N)$	–Supporting intra-ONU priority scheduling –Possible to design more sophisticated DBA with burst polling
EBDBA	Burst polling	Whole ONU	Use (ToS/CoS)	Variable	$O (5 N)$	–Maximizing the network throughput for the AF and EF packets –Minimizing the average packet delay to the EF packet

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Journal of Optical Communications and Networking