Energy efficiency analysis for flexible-grid OFDM-based optical networks

As the Internet traffic grows, the energy efficiency gains more attention as a design factor for the planning and operation of telecommunication networks. This paper is devoted to the study of energy efficiency in optical transport networks, comparing the performance of an innovative flexible-grid n...

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Veröffentlicht in:Computer networks (Amsterdam, Netherlands : 1999) Jg. 56; H. 10; S. 2400 - 2419
Hauptverfasser: López Vizcaíno, Jorge, Ye, Yabin, Tafur Monroy, Idelfonso
Format: Journal Article
Sprache:Englisch
Veröffentlicht: Amsterdam Elsevier B.V 05.07.2012
Elsevier Sequoia S.A
Schlagworte:
Algorithms
Blocking
Computer networks
Dynamic routing (online) problem
Efficiency
Elastic optical path network
Energy
Energy efficiency
Energy management
Fiber optic networks
Heuristic
Internet
Network planning (offline) problem
Network topologies
Networks
Orthogonal Frequency Division Multiplexing
Resource allocation
Routing, modulation level and spectrum allocation
Studies
Traffic engineering
Traffic flow
Wave division multiplexing
Wavelength division multiplexing
Elastic optical path network
Routing, modulation level and spectrum allocation
Energy efficiency
Network planning (offline) problem
Dynamic routing (online) problem
ISSN:1389-1286, 1872-7069
Online-Zugang:Volltext
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Beschreibung
Zusammenfassung:As the Internet traffic grows, the energy efficiency gains more attention as a design factor for the planning and operation of telecommunication networks. This paper is devoted to the study of energy efficiency in optical transport networks, comparing the performance of an innovative flexible-grid network based on Orthogonal Frequency Division Multiplexing (OFDM) with that of conventional fixed-grid Wavelength Division Multiplexing (WDM) networks with a Single Line Rate (SLR) and with a Mixed Line Rate (MLR) operation. The power consumption values of the network elements are introduced. Energy-aware heuristic algorithms are proposed for the resource allocation both in static (offline) and dynamic (online) scenarios with time-varying demands for the Elastic-bandwidth OFDM-based network and the WDM networks (with SLR and MLR). The energy efficiency performance of the two network technologies under different traffic load conditions have been demonstrated for different network sizes through simulations based on the proposed algorithms. The results in energy efficiency and network blocking highlight the benefits of the bandwidth elasticity and the flexibility of selecting different modulation formats offered by OFDM networks.
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ISSN:1389-1286
1872-7069
DOI:10.1016/j.comnet.2012.03.012