DocumentCode :
2370492
Title :
Design of green optical networks with signal quality guarantee
Author :
Cavdar, Cicek ; Ruiz, Marc ; Monti, Paolo ; Velasco, Luis ; Wosinska, Lena
Author_Institution :
R. Inst. of Technol. (KTH), Kista, Sweden
fYear :
2012
fDate :
10-15 June 2012
Firstpage :
3025
Lastpage :
3030
Abstract :
Energy consumption of communication networks is growing very fast due to the rapidly increasing traffic demand. Consequently, design of green communication networks gained a lot of attention. In this paper we focus on optical Wavelength Division Multiplexing (WDM) networks, able to support this growing traffic demand. Several energy-aware routing and wavelength assignment (EA-RWA) techniques have been proposed for WDM networks in order to minimize their operational cost. These techniques aim at minimizing the number of active links by packing the traffic as much as possible, thus avoiding the use of lightly loaded links. As a result, EA-RWA techniques may lead to longer routes and to a high utilization on some specific links. This has a detrimental effect on the signal quality of the optical connections, i.e., lightpaths. In this study we quantify the impact of power consumption minimization on the optical signal quality. and address this problem by proposing a combined impairment and energy-aware RWA (IEA-RWA) approach. Towards this goal we developed a complete mathematical model that incorporates both linear and non-linear physical impairments together with an energy efficiency objective. The IEA-RWA problem is formulized as a Mixed Integer Linear Programming (MILP) model where both energy efficiency and signal quality considerations are jointly optimized. By comparing the proposed IEA-RWA approach with existing RWA (IA-RWA and EA-RWA) schemes, we demonstrate that our solution allows for a reduction of energy consumption close to the one obtained by EA-RWA approaches, while still guaranteeing a sufficient level of the optical signal quality.
Keywords :
integer programming; linear programming; mathematical analysis; optical fibre networks; optical links; telecommunication network routing; telecommunication traffic; wavelength assignment; wavelength division multiplexing; EA-RWA technique; IEA-RWA approach; MILP model; WDM network; detrimental effect; energy consumption; energy efficiency; energy-aware routing-wavelength assignment technique; green optical communication network; impairment-energy-aware RWA approach; linear physical impairment; mathematical model; mixed integer linear programming model; nonlinear physical impairment; operational cost minimization; optical signal quality guarantee; optical wavelength division multiplexing network; power consumption minimization; traffic demand; Optical fiber networks; Physical Impairments; energy-efficient networks; optical WDM networks;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Communications (ICC), 2012 IEEE International Conference on
Conference_Location :
Ottawa, ON
ISSN :
1550-3607
Print_ISBN :
978-1-4577-2052-9
Electronic_ISBN :
1550-3607
Type :
conf
DOI :
10.1109/ICC.2012.6364041
Filename :
6364041
Link To Document :
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