CDMA-Based Dynamic Power and Bandwidth Allocation (DPBA) Scheme for Multiclass EPON: A Weighted Fair Queuing Approach

Elie Inaty; Robert Raad

doi:10.1364/JOCN.10.000052

Journal of Optical Communications and Networking
Vol. 10,
Issue 2,
pp. 52-64
(2018)
•https://doi.org/10.1364/JOCN.10.000052

CDMA-Based Dynamic Power and Bandwidth Allocation (DPBA) Scheme for Multiclass EPON: A Weighted Fair Queuing Approach

Elie Inaty and Robert Raad

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Elie Inaty and Robert Raad, "CDMA-Based Dynamic Power and Bandwidth Allocation (DPBA) Scheme for Multiclass EPON: A Weighted Fair Queuing Approach," J. Opt. Commun. Netw. 10, 52-64 (2018)

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Abstract

Multiclass systems with different quality of service (QoS) requirements are essential in today’s Ethernet passive optical networks (EPONs). In this paper, we propose a code division multiple-access-enabled dynamic power and bandwidth allocation (DPBA) algorithm for a multiclass system. The novelty of the proposed algorithm is the resource allocation components: power control and bandwidth allocation. Both resources are related and optimized through the weights of the weighted round-robin scheduler in a way to meet the physical layer signal to interference ratio and the network layer packet delay requirements for every class of users. Our objective is to offer a differentiated class of services for all optical network units while optimizing network performance and guaranteeing fairness between different classes. A closed-form solution for the optimal power and bandwidth allocation using the DPBA algorithm is analytically derived. It is shown that the proposed algorithm can radically enhance the network performance in terms of packet delay, throughput, queue size management, transmission cycle time, and class of service fairness while guaranteeing the QoS requirements for all classes.

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Power/Bandwidth Allocation	$t_{1}$	$t_{5}$	$t_{6}$
$P_{1}$	4.71 mW	0.16 mW	0 mW
$P_{2}$	0.18 mW	4.55 mW	0.1352 mW
$P_{3}$	0.11 mW	0.29 mW	4.8636 mW
$K_{1}$	4	1^a^,^b	0
$K_{2}$	2	4	2^a^,^b
$K_{3}$	1	2	3^b

$N$	Total number of ONUs	16
$G$	Code processing gain	31
$w_{1}$ , $w_{2}$	Round-robin weights, respectively	3; 2
$β_{j}$ (dB)	Minimum SIR for $j = 1, 2, 3$ , respectively	8; 16; 24
$δ_{j}$ (subcycles)	Delay bound for all ONUs	3
$T_{f}$ (ms)	Fiber delay	200
$T_{p}$ (ms)	Processing delay	35
$T_{g}$ (ms)	Time guard	1.5
$B$ (bits)	Packet size	12,000
$B_{e}$ (bits)	Ethernet overhead	304
$B_{r}$ (bits)	Report/request packet size	576
$R_{u}$ (Gbps)	Upstream transmission rate	1
$W_{max}$ (packets)	Maximum transmission window	10
$M$ (packets)	Maximum buffer size	200
$P$ (mW)	Common reference power	5

Power/Bandwidth Allocation	$t_{1}$	$t_{5}$	$t_{6}$
$P_{1}$	4.71 mW	0.16 mW	0 mW
$P_{2}$	0.18 mW	4.55 mW	0.1352 mW
$P_{3}$	0.11 mW	0.29 mW	4.8636 mW
$K_{1}$	4	1^a^,^b	0
$K_{2}$	2	4	2^a^,^b
$K_{3}$	1	2	3^b

$N$	Total number of ONUs	16
$G$	Code processing gain	31
$w_{1}$ , $w_{2}$	Round-robin weights, respectively	3; 2
$β_{j}$ (dB)	Minimum SIR for $j = 1, 2, 3$ , respectively	8; 16; 24
$δ_{j}$ (subcycles)	Delay bound for all ONUs	3
$T_{f}$ (ms)	Fiber delay	200
$T_{p}$ (ms)	Processing delay	35
$T_{g}$ (ms)	Time guard	1.5
$B$ (bits)	Packet size	12,000
$B_{e}$ (bits)	Ethernet overhead	304
$B_{r}$ (bits)	Report/request packet size	576
$R_{u}$ (Gbps)	Upstream transmission rate	1
$W_{max}$ (packets)	Maximum transmission window	10
$M$ (packets)	Maximum buffer size	200
$P$ (mW)	Common reference power	5

Abstract

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Equations (60)

Journal of Optical Communications and Networking