부산대학교 도서관

Common vehicular channel models (VCMs) accurately predict the packet reception ratio (PRR) observed from dedicated short-range communication (DSRC) field operational tests. However, such independent and identically distributed (i.i.d.) based packet generation models fail to match the bursty channel conditions that result in occasional long periods of packet losses that thwart the ability of safety applications to assist drivers in improving their situational awareness. In this paper, we propose a bursty packet generation algorithm called BUR-GEN, which we evaluate through simulation and, along with several common VCMs, compare to the PRR, inter-packet gap (IPG), and consecutive reception run length (CRRL) of the safety pilot model deployment, a large-scale DSRC-based measurement campaign. The model that incorporates the BUR-GEN packet generation algorithm improves the root-mean-square error of IPG and CRRL by factors of six and four, respectively. Additionally, we assess safety effectiveness using awareness probability. Our results show that safety reliability estimates for vehicle-to-vehicle safety applications are increased by a factor of 31 for maximum safety tolerances, as compared to an i.i.d.-based model that produces that same PRR but does not account for bursty channel behaviors.