PLI-Aware Cost Management for Green Backbone All-Optical WDM Networks via Dynamic Topology Optimization

Amin Ebrahimzadeh; Akbar Ghaffarpour Rahbar; Behrooz Alizadeh

doi:10.1364/JOCN.10.000785

Journal of Optical Communications and Networking
Vol. 10,
Issue 9,
pp. 785-795
(2018)
•https://doi.org/10.1364/JOCN.10.000785

PLI-Aware Cost Management for Green Backbone All-Optical WDM Networks via Dynamic Topology Optimization

Amin Ebrahimzadeh, Akbar Ghaffarpour Rahbar, and Behrooz Alizadeh

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Amin Ebrahimzadeh, Akbar Ghaffarpour Rahbar, and Behrooz Alizadeh, "PLI-Aware Cost Management for Green Backbone All-Optical WDM Networks via Dynamic Topology Optimization," J. Opt. Commun. Netw. 10, 785-795 (2018)

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Abstract

To cope with the energy inefficiency as well as the temporal uncertainty of real-world traffic in all-optical backbone networks, we explore the performance gains obtained from adaptively putting network elements into sleep mode, taking into account physical layer impairments (PLIs). Despite recent progress on link sleep mechanisms, the beneficial impacts of periodically activating and deactivating line amplifiers are seriously restricted by extra incurred operational expenditures due to accelerated aging of network equipment, which is a direct consequence of temperature fluctuations. In this paper, we revisit the problem of green PLI-constrained lightpath establishment, paying close attention to minimizing the number of on/off transitions. Toward this end, we formulate green lightpath establishment as a nonlinear multi-objective optimization problem, which addresses not only the energy efficiency, but also the grade of service and quality of service, using accurate models of a wide variety of linear/nonlinear PLIs. To tackle the developed problem under realistic scenarios, we propose the so-called green adaptive time-aware algorithm, which consists of lightpath establishment as well as wake-up/sleep procedures. The presented analysis followed by verifying simulations confirms that the proposed algorithm stands as a practical solution to the cost-efficient green impairment-constrained lightpath establishment problem under temporal uncertainly of incoming traffic.

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Amin Ebrahimzadeh	https://orcid.org/0000-0002-1741-677X
Akbar Ghaffarpour Rahbar	https://orcid.org/0000-0002-0902-379X

Class	Features
class $A$	$n_{I}^{i, j} ≪ n_{O}^{i, j}, \forall (i, j) \in G^{s}$
class $B$	$n_{I}^{i, j} \approx n_{O}^{i, j}, n_{I}^{i, j} ≪ D_{\max}, n_{O}^{i, j} ≪ D_{\max}, \forall (i, j) \in G^{s}$
class $C$	$n_{I}^{i, j} \approx n_{O}^{i, j}, n_{I}^{i, j} ⪆ D_{\max}, n_{O}^{i, j} ⪆ D_{\max}$
class $D$	$n_{I}^{i, j} ≫ n_{O}^{i, j}$

Parameter	Value	Definition
Physical layer parameters
$P_{in}$	0 dBm	Input signal power
${BER}_{QoS}$	$10^{- 9}$	Maximum acceptable bit error rate
$L_{insertion}$	1 dB	Insertion loss
$h v B_{o}$	−58 dBm
$B_{o}$	70 GHz	Optical bandwidth
$Δ f$	100 GHz	Channel spacing
${OSNR}_{\min}$	20 dB	Minimum allowable OSNR in the receiver
$r$	40 Gbps	Transmission bit rate
$λ_{0}$	1510 nm	Zero dispersion wavelength
$α_{F}$	0.2 dB/km	Fiber loss coefficient
$ϵ$	−40 dB	Switch isolation factor
$δ$	10%	Maximum allowable pulse broadening
$D_{PMD}$	$0.05 ps / \sqrt{km}$	PMD coefficient
$n_{sp}$	1	EDFA excess noise factor
$D_{c}$	3 ps/nm/km	Fiber chromatic dispersion at 1.55 μm
$d D_{c} ∖ d λ$	$0.09 ps / {nm}^{2} / km$	Dispersion slope
$γ$	$2.3 W^{- 1} \cdot {km}^{- 1}$	Fiber nonlinear coefficient
Power consumption parameters
$ε_{a}$	9 W
$ε_{t}$ , $ε_{r}$	2.45 W
$ε_{s}$	1.75 W
$ϕ_{n}$	150 W
Algorithm input parameters
${BR}_{wake-up}$	0.1
$K_{1}$ , $K_{2}$ , $K_{3}$	600
$σ_{GD}$	0.1
$ζ$	0.9
$σ$	0.3
$U_{th}$	0.2

	Optimization Model	GATA Algorithm
$r_{3} = 10$	(401,0.081,5.6)	(472,0.091,4.1)
$r_{3} = 5$	(414,0.083,4.3)	(479,0.092,3.7)
$r_{3} = 4$	(423,0.086,3.2)	(493,0.092,2.8)
$r_{3} = 3$	(451,0.086,2.9)	(494,0.110,2.3)
$r_{3} = 2$	(481,0.081,1.7)	(494,0.120,1.1)

Algorithm	Energy (MJ)	${GD}_{1}$	${GD}_{2}$	${GD}_{3}$	${GD}_{4}$	$N_{total}$
MH-FF-LWUP1	0.82	0.0165	0.2613	0.9808	0.3800	27.6
MH-FF-LWUP2	1.12	0.0128	0.2591	0.4224	0.1526	18.1
MH-RF-LWUP1	0.79	0.0158	0.2602	1.5295	0.6917	24.9
MH-RF-LWUP2	1.06	0.0122	0.2577	0.6680	0.0860	17.3
QP-FF-LWUP1	0.81	0.0155	0.2604	7.4831	1.1744	25.1
QP-FF-LWUP2	1.09	0.0125	0.2567	4.7824	0.2714	17.8
QP-RF-LWUP1	0.77	0.0151	0.2589	6.7283	0.9036	22.9
QP-RF-LWUP2	0.94	0.0111	0.2553	4.5691	0.1815	15.8

PLI-Aware Cost Management for Green Backbone All-Optical WDM Networks via Dynamic Topology Optimization

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Equations (38)

Journal of Optical Communications and Networking