Please use this identifier to cite or link to this item: http://hdl.handle.net/1959.3/208139

Title

Performance analysis of the IEEE 802.11 MAC protocol for DSRC safety applications

Author(s)

Hassan, Md. Imrul;  Vu, Hai L.;  Sakurai, Taka

Abstract

In this paper, we evaluate and improve the performance of the medium-access control (MAC) protocol for safety applications in a dedicated short-range communication (DSRC) environment. We first develop an analytical model to study the IEEE 802.11 distributed coordination function (DCF) MAC protocol that has been adopted by the IEEE 802.11p standard for DSRC. Explicit expressions are derived for the mean and standard deviation of the packet delay, as well as for the packet delivery ratio (PDR) at the MAC layer in an unsaturated network formed by moving vehicles on a highway. The proposed model is validated using extensive simulations, and its superior accuracy is compared with that of other existing models is demonstrated. Insights gained from our model reveal that the principal reason for the low PDR of the DCF protocol is packet collision due to transmissions from hidden terminals. We then present a novel protocol based on the DCF that uses an out-of-band busy tone as a negative acknowledgment to provide an efficient solution to the aforementioned problem. We extend our analytical model to the enhanced protocol and show that it preserves predictive accuracy. Most importantly, our numerical experiments confirm that the enhanced protocol improves the PDR by up to 10% and increases the supported vehicle density by up to two times for a range of packet arrival rates while maintaining the delay below the required threshold level.

Publication type

Journal article

Research centre

Swinburne University of Technology. Faculty of Information and Communication Technologies. Centre for Advanced Internet Architectures

Source

IEEE Transactions on Vehicular Technology, Vol. 60, no. 8 (Oct 2011), pp. 3882-3896

Publication year

2011

FOR Code(s)

08 Information and Computing Sciences;  09 Engineering;  10 Technology

Keyword(s)

Dedicated short-range communication;  DSRC;  IEEE 802.11;  MAC;  Medium-access control;  Performance analysis;  Safety applications

Publisher

IEEE

ISSN

0018-9545

Publisher URL

http://dx.doi.org/10.1109/tvt.2011.2162755

Copyright

Copyright © 2011 IEEE

Peer reviewed