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Bigger is Better - Combining Contention Window Adaptation with Geo-based Backoff Generation in DSRC Networks

Kloiber, Bernhard und Härri, Jérôme und Strang, Thomas und Sand, Stephan (2014) Bigger is Better - Combining Contention Window Adaptation with Geo-based Backoff Generation in DSRC Networks. In: ICCVE 2014 Conference Proceedings. International Conference on Connected Vehicles and Expo, 2014-11-03 - 2014-11-07, Vienna, Austria. doi: 10.1109/ICCVE.2014.7297546.

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Kurzfassung

The vision of safer transportation is strongly driven by the introduction of Vehicular Safety Communications (VSC) to enable new cooperative safety applications. In highly dense traffic scenarios, however, the current Dedicated Short Range Communications (DSRC) technology is expected to face serious performance problems due to simultaneous transmissions making packets to collide with each other. In this paper, we first analyze the sources of packet collisions. The analysis reveals a significant amount of simultaneous transmissions as vehicles have chosen the same backoff counter, especially in the close vicinity, which is the most critical area with respect to safety. Based on these observations, we then introduce a new concept for DSRC backoff generation called geo-backoff. It implements two countermeasures: First, we increase the Contention Window (CW) to reduce the probability of simultaneous transmissions in general. Second, we exploit geographical information for generating the current backoff counter to further reduce the probability of packet collisions at short (critical) ranges. We analyze our concept from a traditional TX-RX perspective (latency) as well as an RX-centric perspective (update delay). The simulation results indeed have shown that geo-backoff is able to improve the communication performance, but the improvement is mainly dominated by just increasing the CW.

elib-URL des Eintrags:https://elib.dlr.de/90613/
Dokumentart:Konferenzbeitrag (Vortrag)
Titel:Bigger is Better - Combining Contention Window Adaptation with Geo-based Backoff Generation in DSRC Networks
Autoren:
AutorenInstitution oder E-Mail-AdresseAutoren-ORCID-iDORCID Put Code
Kloiber, Bernhardbernhard.kloiber (at) dlr.deNICHT SPEZIFIZIERTNICHT SPEZIFIZIERT
Härri, JérômeEURECOMNICHT SPEZIFIZIERTNICHT SPEZIFIZIERT
Strang, Thomasthomas.strang (at) dlr.dehttps://orcid.org/0009-0000-1313-4751NICHT SPEZIFIZIERT
Sand, StephanStephan.Sand (at) DLR.dehttps://orcid.org/0000-0001-9502-5654NICHT SPEZIFIZIERT
Datum:2014
Erschienen in:ICCVE 2014 Conference Proceedings
Referierte Publikation:Ja
Open Access:Ja
Gold Open Access:Nein
In SCOPUS:Nein
In ISI Web of Science:Nein
DOI:10.1109/ICCVE.2014.7297546
Status:veröffentlicht
Stichwörter:DSRC, vehicular safety communication, contention window, geo-backoff
Veranstaltungstitel:International Conference on Connected Vehicles and Expo
Veranstaltungsort:Vienna, Austria
Veranstaltungsart:internationale Konferenz
Veranstaltungsbeginn:3 November 2014
Veranstaltungsende:7 November 2014
HGF - Forschungsbereich:Luftfahrt, Raumfahrt und Verkehr
HGF - Programm:Verkehr
HGF - Programmthema:Bodengebundener Verkehr (alt)
DLR - Schwerpunkt:Verkehr
DLR - Forschungsgebiet:V BF - Bodengebundene Fahrzeuge
DLR - Teilgebiet (Projekt, Vorhaben):V - Fahrzeugintelligenz (alt)
Standort: Oberpfaffenhofen
Institute & Einrichtungen:Institut für Kommunikation und Navigation > Nachrichtensysteme
Hinterlegt von: Kloiber, Bernhard
Hinterlegt am:09 Dez 2014 09:11
Letzte Änderung:24 Apr 2024 19:56

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