Dynamic Bandwidth Allocation With SLA Awareness for QoS in Ethernet Passive Optical Networks

Abhishek Dixit; Bart Lannoo; Goutam Das; Didier Colle; Mario Pickavet; Piet Demeester

doi:10.1364/JOCN.5.000240

Journal of Optical Communications and Networking
Vol. 5,
Issue 3,
pp. 240-253
(2013)
•https://doi.org/10.1364/JOCN.5.000240

Dynamic Bandwidth Allocation With SLA Awareness for QoS in Ethernet Passive Optical Networks

Abhishek Dixit, Bart Lannoo, Goutam Das, Didier Colle, Mario Pickavet, and Piet Demeester

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Abhishek Dixit, Bart Lannoo, Goutam Das, Didier Colle, Mario Pickavet, and Piet Demeester, "Dynamic Bandwidth Allocation With SLA Awareness for QoS in Ethernet Passive Optical Networks," J. Opt. Commun. Netw. 5, 240-253 (2013)

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Abstract

Quality-of-service (QoS) support in Ethernet passive optical networks is a crucial concern. We propose a new dynamic bandwidth allocation (DBA) algorithm for service differentiation that meets the service-level agreements (SLAs) of the users. The proposed delay-aware (DA) online DBA algorithm provides constant and predictable average packet delay and reduced delay variation for the high- and medium-priority traffic while keeping the packet loss rate under check. We prove the effectiveness of the proposed algorithm by exhaustive simulations.

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Parameter	Description	Value
$N_{o}$	Number of ONUs	16
$N$	Number of priority classes	3
$R_{L}$	Line rate of user-to-ONU	$100 Mbits / s$
$R_{U}$	Upstream bandwidth	$1 Gbit / s$
$Q$	Buffer size in ONU	10 Mbytes
$L$	Maximum distance between OLT and an ONU	20 km
$B$	Guard time between adjacent slots	1 μs
$T_{\max}$	Maximum cycle time	1.5 ms
$D_{EF}$	Maximum delay bound for EF traffic	1.5 ms
$D_{AF}$	Average delay desired for AF traffic	2 ms

Group	ONUs	Parameter required
A	ONU1–ONU4	$D_{EF} = 0.75 ms$
A	ONU1–ONU4	$D_{AF} = 5 ms$
B	ONU5–ONU8	$D_{EF} = 1.5 ms$
B	ONU5–ONU8	$D_{AF} = 5 ms$
C	ONU9–ONU12	$D_{EF} = 3 ms$
C	ONU9–ONU12	$D_{AF} = 10 ms$
D	ONU13–ONU16	$D_{EF} = 3 ms$
D	ONU13–ONU16	$D_{AF} = 20 ms$

Parameter	Description	Value
$N_{o}$	Number of ONUs	16
$N$	Number of priority classes	3
$R_{L}$	Line rate of user-to-ONU	$100 Mbits / s$
$R_{U}$	Upstream bandwidth	$1 Gbit / s$
$Q$	Buffer size in ONU	10 Mbytes
$L$	Maximum distance between OLT and an ONU	20 km
$B$	Guard time between adjacent slots	1 μs
$T_{\max}$	Maximum cycle time	1.5 ms
$D_{EF}$	Maximum delay bound for EF traffic	1.5 ms
$D_{AF}$	Average delay desired for AF traffic	2 ms

Group	ONUs	Parameter required
A	ONU1–ONU4	$D_{EF} = 0.75 ms$
A	ONU1–ONU4	$D_{AF} = 5 ms$
B	ONU5–ONU8	$D_{EF} = 1.5 ms$
B	ONU5–ONU8	$D_{AF} = 5 ms$
C	ONU9–ONU12	$D_{EF} = 3 ms$
C	ONU9–ONU12	$D_{AF} = 10 ms$
D	ONU13–ONU16	$D_{EF} = 3 ms$
D	ONU13–ONU16	$D_{AF} = 20 ms$

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Journal of Optical Communications and Networking