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Enabling Greener DSL Access Networks by their Stabilization with Artificial Noise and SNR Margin
FTW Telecommunications Research Center Vienna, Vienna, Austria.
FTW Telecommunications Research Center Vienna, Vienna, Austria.
Halmstad University, School of Information Technology, Halmstad Embedded and Intelligent Systems Research (EIS), Centre for Research on Embedded Systems (CERES).ORCID iD: 0000-0002-0562-2082
2013 (English)In: Cluster Computing, ISSN 1386-7857, E-ISSN 1573-7543, Vol. 16, no 3, 407-419 p.Article in journal (Refereed) Published
Abstract [en]

Low-power modes (LPM) are a standardized means in asymmetric digital subscriber lines (ADSL) 2 for reducing the power consumption at the central office. However, the activation of LPMs is hampered by the operators’ concern for instability introduced by frequent transmit power changes. The injection of artificial noise (AN) has been proposed as a standard-compliant stabilization technique. We develop an analytical solution for setting the AN power spectrum. Based on this solution we jointly optimize the AN power spectrum and the signal-to-noise ratio (SNR) margin. Simulation results show the performance gain in terms of rate and energy compared to heuristic rules for setting the AN power spectrum. We propose and demonstrate three approaches for evaluating the performance of AN-enabled DSL systems, including (a) joint spectrum balancing, AN, and margin optimization, (b) single-user worst-case-stable optimization, and (c) worst-case-stable optimization based on sequential initialization. Simulation results confirm a strong dependency of the performance under AN on the selected SNR margins, and highlight the total AN power consumption as well as the residual energy savings under low-power modes stabilized by AN. © 2012 The Author(s).

Place, publisher, year, edition, pages
Berlin/Heidelberg: Springer, 2013. Vol. 16, no 3, 407-419 p.
Keyword [en]
Digital subscriber lines, Artificial noise, Optimization, Low-power mode
National Category
Telecommunications
Identifiers
URN: urn:nbn:se:hh:diva-19499DOI: 10.1007/s10586-012-0206-yISI: 000322775400008Scopus ID: 2-s2.0-84881031028OAI: oai:DiVA.org:hh-19499DiVA: diva2:550317
Note

The Competence Center FTW Forschungszentrum Telekommunikation Wien GmbH is funded within the program COMET—Competence Centers for Excellent Technologies by BMVIT, BMWA, and the City of Vienna. The COMET program is managed by the FFG.

Available from: 2012-09-06 Created: 2012-09-06 Last updated: 2017-04-03Bibliographically approved

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CiteExportLink to record
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Citation style
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