MAC trade-offs between age and reachability of information in vehicular safety applications

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Vehicular networking offers the promise of greatly improving transportation safety but has stringent requirements on information age as well as information reachability, where the later refers to the range over which information is propagated. We consider an idealized model of a one-dimensional vehicular networks and show that there is a basic trade-off between these two metrics: a smaller age can be obtained by reducing the reachability of information. We apply this to two current technologies: Cellular V2X (C-V2X) and Dedicated Short Range Communication (DSRC) and derive an equation that characterizes the trade-off between these two metrics for both technologies. In the case of exponential path loss and negligible noise, this relationship becomes a fixed invariant ratio. Given this relationship, under high congestion, these two protocols tradeoff these metrics differently. C-V2X tends to achieve a smaller age while DSRC tends to maintain a larger reachability. The idealized model is also applied to analyze the steady state of rate control and power control mechanisms such as those in the SAE standard J2945/1. We show that the ratio of age and reachability is still governed by the same trade-off curve: rate control tries to maintain a large reachability, while power control helps improve the age.

Original languageEnglish (US)
Title of host publicationIEEE INFOCOM 2020 - IEEE Conference on Computer Communications Workshops, INFOCOM WKSHPS 2020
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages689-695
Number of pages7
ISBN (Electronic)9781728186955
DOIs
StatePublished - Jul 2020
Event2020 IEEE INFOCOM Conference on Computer Communications Workshops, INFOCOM WKSHPS 2020 - Toronto, Canada
Duration: Jul 6 2020Jul 9 2020

Publication series

NameIEEE INFOCOM 2020 - IEEE Conference on Computer Communications Workshops, INFOCOM WKSHPS 2020

Conference

Conference2020 IEEE INFOCOM Conference on Computer Communications Workshops, INFOCOM WKSHPS 2020
CountryCanada
CityToronto
Period7/6/207/9/20

ASJC Scopus subject areas

  • Computer Networks and Communications
  • Computer Science Applications
  • Hardware and Architecture
  • Information Systems and Management
  • Safety, Risk, Reliability and Quality

Fingerprint Dive into the research topics of 'MAC trade-offs between age and reachability of information in vehicular safety applications'. Together they form a unique fingerprint.

Cite this