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To wait or to drop: on the optimal number of retransmissions in wireless control
KTH, School of Electrical Engineering (EES), Centres, ACCESS Linnaeus Centre.ORCID iD: 0000-0003-4733-2240
KTH, School of Electrical Engineering (EES), Centres, ACCESS Linnaeus Centre.ORCID iD: 0000-0003-1725-2901
Univ Newcastle, Sch Elect Engn & Comp Sci, Callaghan, NSW 2308, Australia..ORCID iD: 0000-0002-4804-5481
KTH, School of Electrical Engineering and Computer Science (EECS), Automatic Control. KTH, School of Electrical Engineering (EES), Centres, ACCESS Linnaeus Centre.
2015 (English)In: 2015 EUROPEAN CONTROL CONFERENCE (ECC), IEEE , 2015, p. 962-968Conference paper, Published paper (Refereed)
Abstract [en]

The dimensioning of wireless communication protocols for networked control involves a non-trivial trade-off between reliability and delay. Due to the lossy nature of wireless communications, there is a risk that sensor messages will be dropped. The end-to-end reliability can be improved by retransmitting dropped messages, but this comes at the expense of additional delays. In this work, we determine the number of retransmissions that strikes the optimal balance between communication reliability and delay, in the sense that it achieves the minimal expected linear-quadratic loss of the closed-loop system. An important feature of our setup is that it accounts for the random delays and possible losses that occur when unreliable communication is combatted with retransmissions. The resulting controller dynamically switches among a set of infinite-horizon linear-quadratic regulators, and is simple to implement. Numerical simulations are carried out to highlight the trade-off between reliability and delay.

Place, publisher, year, edition, pages
IEEE , 2015. p. 962-968
National Category
Control Engineering
Identifiers
URN: urn:nbn:se:kth:diva-243725ISI: 000380485400150OAI: oai:DiVA.org:kth-243725DiVA, id: diva2:1292121
Conference
2015 EUROPEAN CONTROL CONFERENCE (ECC)
Note

QC 20190227

Available from: 2019-02-27 Created: 2019-02-27 Last updated: 2019-08-21Bibliographically approved

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Demirel, BurakAytekin, ArdaJohansson, Mikael

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  • apa
  • harvard1
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