Ändra sökning
RefereraExporteraLänk till posten
Permanent länk

Direktlänk
Referera
Referensformat
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Annat format
Fler format
Språk
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Annat språk
Fler språk
Utmatningsformat
  • html
  • text
  • asciidoc
  • rtf
Relaying for Timely and Reliable Applications in Wireless Networks
Högskolan i Halmstad, Akademin för informationsteknologi, Halmstad Embedded and Intelligent Systems Research (EIS), Centrum för forskning om inbyggda system (CERES).
2017 (Engelska)Doktorsavhandling, monografi (Övrigt vetenskapligt)
Abstract [en]

Many emerging applications based on wireless networks involve distributed control. This implies high requirements on reliability, but also on predictable maximum delay. Further, for applications, it is vital to use off-the-shelf components, both due to cost constraints and requirements on interoperability with existing networks. This, in turn, implies that concurrent transmissions and multiuser detection are seldom possible. Instead, half-duplex time-division multiple access (TDMA) is typically used. Aiming to reduce the packet error rate given a deadline (a set of TDMA time-slots), this thesis proposes a relaying scheme, which can be implemented on top of off-the-shelf components. The relaying scheme selects the best sequence of relayers, given the number of time-slots allowed by the deadline, such that the resulting error probability is minimized at the targeted receiver(s). The scheme differs from existing work in that it considers both unicast as well as broadcast and assumes that all nodes can overhear each other, as opposed to separating source nodes, relay nodes and destination nodes into three disjoint sets. A full analysis of the resulting error probability is provided and complementary numerical results show that the proposed relay sequencing strategy significantly improves reliability given a certain maximum delay, or alternatively, reduces the delay, given a certain target reliability requirement. To illustrate the performance improvements of relay sequencing, it is incorporated in a platooning application. If the decision regarding which relayer to assign in each time-slot can be taken online, just before the transmission, much can be gained. To this end, a low-complexity algorithm is developed, which is shown to be highly likely to find the optimal combination of relaying nodes that minimizes the resulting error probability at the targeted receiver(s). Data packets in wireless automation networks is typically small. To enable timely and reliable all-to-all broadcast in such systems, relay sequencing using packet aggregation is proposed. The strategy assigns relayers to time slots, as well as determines which packets to aggregate in each slot, using the proposed low-complexity algorithm. To further increase the reliability, a clustering scheme is proposed. When a relayer in the sequence fails to overhear a correct copy, a backup relayer in the cluster takes over. This work thereby enables ultra-reliable communications with maintained end-toend delay using low-complexity techniques and off-the-shelf components.

Ort, förlag, år, upplaga, sidor
Halmstad: Halmstad University Press, 2017. , 68 s.
Serie
Halmstad University Dissertations, 35
Nationell ämneskategori
Kommunikationssystem
Identifikatorer
URN: urn:nbn:se:hh:diva-35172ISBN: 978-91-87045-72-1 (tryckt)ISBN: 978-91-87045-73-8 (digital)OAI: oai:DiVA.org:hh-35172DiVA: diva2:1148327
Disputation
2017-11-03, Wigforss, House J (Visionen), Kristian IV:s väg 3, Halmstad, 13:15 (Engelska)
Opponent
Handledare
Tillgänglig från: 2017-10-17 Skapad: 2017-10-10 Senast uppdaterad: 2017-10-31Bibliografiskt granskad

Open Access i DiVA

fulltext(2081 kB)52 nedladdningar
Filinformation
Filnamn FULLTEXT01.pdfFilstorlek 2081 kBChecksumma SHA-512
9411320b3d480335fcf5a1d5acce1bba42ca63c9cd88c697bffd7dc345623ffb3d0859e0ef28b383ccf05597895b3d90d995fe2a614f435fbcf2601b5f3b2414
Typ fulltextMimetyp application/pdf

Sök vidare i DiVA

Av författaren/redaktören
Hoang, Le-Nam
Av organisationen
Centrum för forskning om inbyggda system (CERES)
Kommunikationssystem

Sök vidare utanför DiVA

GoogleGoogle Scholar
Totalt: 52 nedladdningar
Antalet nedladdningar är summan av nedladdningar för alla fulltexter. Det kan inkludera t.ex tidigare versioner som nu inte längre är tillgängliga.

isbn
urn-nbn

Altmetricpoäng

isbn
urn-nbn
Totalt: 222 träffar
RefereraExporteraLänk till posten
Permanent länk

Direktlänk
Referera
Referensformat
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Annat format
Fler format
Språk
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Annat språk
Fler språk
Utmatningsformat
  • html
  • text
  • asciidoc
  • rtf