Stochastic Analysis of Delay Statistics for Intermittently Connected Vehicular Networks
Konferenz: European Wireless 2014 - 20th European Wireless Conference
14.05.2014 - 16.05.2014 in Barcelona, Spain
Tagungsband: European Wireless 2014
Seiten: 6Sprache: EnglischTyp: PDFPersönliche VDE-Mitglieder erhalten auf diesen Artikel 10% Rabatt
Badia, Leonardo; Scalabrin, Maria (Dept. of Information Engineering, University of Padova, via Gradenigo 6B, 35131 Padova, Italy)
We analyze information delivery over a network where direct data exchange via wireless is not possible and therefore intermittent connection through vehicular relaying is used. We refer to a multi-hop scenario where a stationary unit exchanges data packets with a destination outside its communication range, using passing-by vehicles as information carriers. In such a context, we propose an exact mathematical model based on Markov chains to quantify relevant performance metrics. In particular, while throughput-related parameters can be directly obtained via queueing analysis, delay statistics are more complex to derive, due to the in-order delivery requirement for the transmitted information content. Hence, data packets transported by fast vehicles still need to wait for the reception of all previous packets, possibly carried by slower vehicles. Nevertheless, by properly exploiting structural properties of the resulting Markov chains, the delay statistics can be fully characterized.