Quantifying caching effects in urban VANETs

Chaoyi Bian, Tong Zhao, Xiaoming Li, Xiaojiang Du, Mohsen Guizani, Wei Yan

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

2 Scopus citations

Abstract

Most applications in urban Vehicular Ad hoc NETworks (VANETs) rely on information sharing, such as real-Time traffic information queries, advertisements, etc. However, existing data dissemination techniques cannot guarantee satisfactory performance when a lot of information requests come from all around the network. Because these pieces of information are useful for multiple users located in various positions, it is beneficial to spread the cached copies around. Existing work proposed caching mechanisms and conducted simulations for validation, but there is a lack of theoretical analysis on the explicit caching effects. In this paper, we present the cache coverage ratio as the metric to quantify the caching effects, and theoretical analysis is given based on reasonable assumptions for urban VANETs, through which we find the affecting factors include vehicle density, transmission range, ratio of caching vehicles, etc. We deduce the quantitative relationship among them, which have similar forms as the cumulative density function of an exponential distribution. We conduct intensive simulations, which verify the theoretical analysis results match quite well with the simulated reality under different scenarios.

Original languageEnglish
Title of host publication2016 IEEE Wireless Communications and Networking Conference, WCNC 2016
ISBN (Electronic)9781467398145
DOIs
StatePublished - 12 Sep 2016
Event2016 IEEE Wireless Communications and Networking Conference, WCNC 2016 - Doha, Qatar
Duration: 3 Apr 20167 Apr 2016

Publication series

NameIEEE Wireless Communications and Networking Conference, WCNC
Volume2016-September
ISSN (Print)1525-3511

Conference

Conference2016 IEEE Wireless Communications and Networking Conference, WCNC 2016
Country/TerritoryQatar
CityDoha
Period3/04/167/04/16

Keywords

  • VANET
  • analysis
  • cache
  • simulation

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