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Analysis of networked estimation under contention-based medium access
KTH, School of Electrical Engineering (EES), Automatic Control.
KTH, School of Information and Communication Technology (ICT), Communication Systems, CoS.
KTH, School of Electrical Engineering (EES), Automatic Control.
2008 (English)In: 17th World Congress, International Federation of Automatic Control, IFAC, 2008Conference paper, Published paper (Refereed)
Abstract [en]

We treat a problem in networked estimation where the focus is on sampling and transmitting measurements of the plant over a shared medium. The object is to choose the sampling rate at the sensor while taking the statistics of a contention based MAC protocol into account. In particular, we seek a trade-off between the reliable delivery of individual data packets and the input data load on the communication medium. Our analysis of the shared channel computes a probability of packet loss for an assumed IID loss process. This loss rate depends on the input packet stream intensities. We compute the estimation distortion with IID losses of periodically generated samples, as a function of the packet loss rate. This throws up a condition for stable estimator performance. We investigate the scalability limits of this stability as a function of the number of nodes. When stable estimation is possible, we provide a procedure that computes the input packet rate for the network that minimizes the average estimation distortion. We reproduce the analysis of estimation performance when the sensors sample asynchronously according to independent Poisson counters.

Place, publisher, year, edition, pages
2008.
Series
IFAC Proceedings Volumes, ISSN 1474-6670 ; 17
Keyword [en]
Cross-layer optimization; Estimation over lossy links; Networked Estimation
National Category
Control Engineering
Identifiers
URN: urn:nbn:se:kth:diva-79738OAI: oai:DiVA.org:kth-79738DiVA: diva2:499923
Conference
17th World Congress, International Federation of Automatic Control, IFAC. Seoul. 6 July 2008 - 11 July 2008
Note

QC 20120214

Available from: 2012-02-13 Created: 2012-02-09 Last updated: 2017-06-14Bibliographically approved

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CiteExportLink to record
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Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf