Demonstration of GMPLS-Controlled Device Power Management for Next Generation Green Optical Networks

Morea, Annalisa; Perelló, Jordi; Agraz, Fernando; Spadaro, Salvatore

doi:10.1364/ofc.2012.om3g.6

Cited by 8 publications

(10 citation statements)

References 3 publications

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“…With the aim of saving energy, the HALF‐MOON project proposed the dynamic power management of OE devices (i.e., transponders (TSPs) and regenerators (REGs)) [32]. OE devices can be totally or partially powered (“up” and “idle” states, respectively) or switched‐off (“down” state).…”

Section: Half‐moon Approachmentioning

confidence: 99%

“…In the scenario considering 1:1 protection, if OESM is implemented, TSPs/REGs allocated for backup paths can be set in idle‐state to save energy when inactive, while still ensuring fast response times in case of failure (i.e., gold class setup times average ∼10 milliseconds [32]). Regarding amplifier sites, however, even if they could be woken‐up in tens or hundreds of milliseconds, long‐haul links easily comprise many which have to be sequentially activated.…”

Section: Half‐moon Approach For Energy Savings: a Case Studymentioning

confidence: 99%

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Protocol enhancements for “greening” optical networks

et al. 2013

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The last decade has spurred a number of research efforts around energy efficiency in information and communication technologies (ICT). To reduce the energy consumed by optical transport networks, one option is to switch‐off a certain number of optical systems according to the amount of transported traffic. Consequently, dynamic power management of optoelectronic devices and link sleep‐mode approaches have been proposed; these capabilities quantitatively optimize the power requirements and the available bandwidth of the network as a whole. This paper presents enhancements embedded in Generalized Multiprotocol Label Switching (GMPLS)‐based protocols enabling power control in optical devices, and then analyzes the impact of controlling the daily energy consumption of optical switching equipment in the network. We also present ongoing activities in specific standardization working groups for “greening the network” along with their proposals to improve the energy efficiency of future optical networks. © 2013 Alcatel‐Lucent.

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Section: Half‐moon Approachmentioning

confidence: 99%

Section: Half‐moon Approach For Energy Savings: a Case Studymentioning

confidence: 99%

Protocol enhancements for “greening” optical networks

et al. 2013

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“…[5], [6]) confirm the benefits of putting some elements in core optical networks into a low-power consumption mode. In [7], different classes of traffic are considered and, as a consequence, the setup time of the connections becomes a critical parameter, since typically high-priority traffic (e.g., real-time traffic) requires short set-up times, while low-priority traffic does not. Considering that the boot-up time (i.e., the time required for the transition of a TSP or a REG from the off to on mode) can be quite long (tens of seconds [4]), available TSPs and REGs in the off mode cannot be allocated to support highpriority traffic.…”

Section: Introductionmentioning

confidence: 99%

Analysis of Performance Degradation in Sleep-Mode Enabled Core Optical Networks [Invited]

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Perelló

et al. 2015

J. Opt. Commun. Netw.

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Abstract-Energy efficiency is an important target for the management of Wavelength Division Multiplexing-based core optical networks. A possible power management strategy for energy efficient optical networks consists in putting opto-electronic devices (transponders and regenerators) into a low power mode, called sleep or idle, or even turning them off, during low traffic periods. It has been shown that sleepmode enabled transponders and regenerators yield to substantial energy savings; however, their non-negligible wakeup time may degrade the network performance in terms of blocking probability of the connections. Opaque networks, where transponders are utilized at each node in the endto-end path, are specially prone to such degradations since multiple network nodes may exhaust simultaneously their pool of transponders due to long wake-up times, increasing the blocking probability. On the other hand, these degradations are less severe in transparent networks. In this paper, we evaluate how the duration of the wake-up time affects the performance of the network in terms of blocking probability depending on its architecture (transparent, translucent or opaque) and the dynamicity of the traffic. Additionally, we propose a novel routing algorithm to mitigate the blocking probability due to the wake-up time. The benefits of the proposed algorithm are highlighted through extensive results.

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“…1 depicts the inter-state transitions. Let us now consider the case of different classes of connections [3]. In this context, the set-up time requirements of the connections might become a critical parameter.…”

Section: Introductionmentioning

confidence: 99%

“…Note that, by reserving some of the available TSPs per node for C h traffic and putting them on IDLE state, it is possible to satisfy both C h and C l connections set-up time requirements, and, at the same time reduce the power consumption of the network. For instance, authors in [3] reported daily power savings around 56% with respect to traditional WDM network scenarios. However, besides the power savings, we must carefully evaluate the impact of this power management strategy on the blocking of the connections, e.g., due to the lack of available TSPs, specifically, lack of IDLE TSPs for C h traffic and lack of OFF TSPs for C l traffic.…”

Section: Introductionmentioning

confidence: 99%

A Blocking Analysis for Green WDM Networks With Transponder Power Management

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Musumeci

et al. 2014

J. Lightwave Technol.

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Energy-efficiency has been widely recognized as an important target in the management of optical wavelength division multiplexing networks. A very promising power management strategy consists in putting unused transponders into a low-power state, called idle or sleep state, or even in turning them off. However, in such scenario, it should be also guaranteed that high-priority traffic, which requires short setup times, is quickly established without waiting for the long activation time of powered-off devices. A possible strategy to avoid long setup times is to reserve some idle transponders for high-priority traffic. However, reserving a large number of idle transponders for high-priority traffic will increase the blocking of low-priority traffic, since less resources are available. To analyze this tradeoff, in this paper we present a novel analytical model based on Markov chains to evaluate the blocking probability and the power savings of this transponder power management in presence of high-and low-priority traffic. The presented model can be used to estimate both power savings and blocking levels and to provide guidelines on how to dimension the number of reserved devices for high-priority traffic. Index Terms-Blocking analysis, Markov chain, ON/OFF strategies. 0733-8724

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Demonstration of GMPLS-Controlled Device Power Management for Next Generation Green Optical Networks

Cited by 8 publications

References 3 publications

Protocol enhancements for “greening” optical networks

Protocol enhancements for “greening” optical networks

Analysis of Performance Degradation in Sleep-Mode Enabled Core Optical Networks [Invited]

A Blocking Analysis for Green WDM Networks With Transponder Power Management

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Demonstration of GMPLS-Controlled Device Power Management for Next Generation Green Optical Networks

Cited by 8 publications

References 3 publications

Protocol enhancements for &#x201C;greening&#x201D; optical networks

Protocol enhancements for &#x201C;greening&#x201D; optical networks

Analysis of Performance Degradation in Sleep-Mode Enabled Core Optical Networks [Invited]

A Blocking Analysis for Green WDM Networks With Transponder Power Management

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Protocol enhancements for “greening” optical networks

Protocol enhancements for “greening” optical networks