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Analysis of networked estimation under contention-based medium access
KTH, Skolan för elektro- och systemteknik (EES), Reglerteknik.
KTH, Skolan för informations- och kommunikationsteknik (ICT), Kommunikationssystem, CoS.
KTH, Skolan för elektro- och systemteknik (EES), Reglerteknik.
2008 (Engelska)Ingår i: 17th World Congress, International Federation of Automatic Control, IFAC, 2008Konferensbidrag, Publicerat paper (Refereegranskat)
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.

Ort, förlag, år, upplaga, sidor
2008.
Serie
IFAC Proceedings Volumes, ISSN 1474-6670 ; 17
Nyckelord [en]
Cross-layer optimization; Estimation over lossy links; Networked Estimation
Nationell ämneskategori
Reglerteknik
Identifikatorer
URN: urn:nbn:se:kth:diva-79738OAI: oai:DiVA.org:kth-79738DiVA, id: diva2:499923
Konferens
17th World Congress, International Federation of Automatic Control, IFAC. Seoul. 6 July 2008 - 11 July 2008
Anmärkning

QC 20120214

Tillgänglig från: 2012-02-13 Skapad: 2012-02-09 Senast uppdaterad: 2017-06-14Bibliografiskt granskad

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Av författaren/redaktören
Rabi, MabenStabellini, LucaAlmström, PeterJohansson, Mikael
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ReglerteknikKommunikationssystem, CoS
Reglerteknik

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