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To wait or to drop: on the optimal number of retransmissions in wireless control
KTH, Skolan för elektro- och systemteknik (EES), Centra, ACCESS Linnaeus Centre.ORCID-id: 0000-0003-4733-2240
KTH, Skolan för elektro- och systemteknik (EES), Centra, 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, Skolan för elektroteknik och datavetenskap (EECS), Reglerteknik. KTH, Skolan för elektro- och systemteknik (EES), Centra, ACCESS Linnaeus Centre.
2015 (engelsk)Inngår i: 2015 EUROPEAN CONTROL CONFERENCE (ECC), IEEE , 2015, s. 962-968Konferansepaper, Publicerat paper (Fagfellevurdert)
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.

sted, utgiver, år, opplag, sider
IEEE , 2015. s. 962-968
HSV kategori
Identifikatorer
URN: urn:nbn:se:kth:diva-243725ISI: 000380485400150OAI: oai:DiVA.org:kth-243725DiVA, id: diva2:1292121
Konferanse
2015 EUROPEAN CONTROL CONFERENCE (ECC)
Merknad

QC 20190227

Tilgjengelig fra: 2019-02-27 Laget: 2019-02-27 Sist oppdatert: 2019-08-21bibliografisk kontrollert

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Demirel, BurakAytekin, ArdaJohansson, Mikael

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