Published Paper Details:

An empirical model is proposed for the reliability of a dedicated short-range contact channel (DSRC) control channel (CCH) for handling safety applications in vehicle ad hoc networks (VANETs). In particular, the model allows to evaluate the probability of receiving status and safety messages from all vehicles inside the transmitter range and from vehicles up to a certain distance, respectively. The proposed model is based on a modern model of mobility that takes into account the following safety rule for the vehicle in order to accurately derive the relationship between average vehicle speed and density. Moreover, the model consider some factors they are 1) Mobility impact on the vehicles density all around the transmitter, 2) system reliability depends on transmitter�s and receiver�s speed, 3)Communication range has been modeled as a random variable to study the effect of channel fading, and 4) Transmission collisions and hidden terminal problems from neighboring vehicles. It is shown that the current DSRC specifications will lead to severe degradation of performance under dense and high-mobility conditions. Therefore, an adaptive algorithm is implemented to improve device efficiency in terms of the likelihood of successful receipt of the packet and the delay of emergency messages in a harsh vehicular environment.