Reliability Performance of Transmitter Selection in Wireless Vehicular Networks

Abstract

In this paper, we propose a novel and simple transmitter selection criterion to enhance the reliability performance of downlink transmission in a wireless vehicular network. In this network, the Manhattan-type urban street model is adopted such that the location of horizontal and vertical streets is generated by two independent and identical Poisson Point Processes (PPPs). Moreover, the location of vehicles on each street is modeled by a one-dimensional PPP and base stations (BSs) are located at the intersection of streets. According to the proposed criterion, the vehicle receives signals from either the nearest front vehicle via dedicated short range communications or the nearest front BS via cellular communications. Considering the generalized Nakagami-m fading, we derive a new easy-to-compute expression for the coverage probability of the signal-interference-plus-noise ratio of the vehicle at the origin. Aided by numerical results, we demonstrate the accuracy of the derived expression and explicitly show the performance advantage of the proposed criterion. In addition, we find that there is an optimal vehicle intensity to maximize the coverage probability. Show more