Analysis of a Location-Aware Probabilistic Strategy for Opportunistic Vehicle-to-Vehicle Relay

Abstract

Vehicular networks can enable a variety of services to improve safety and comfort for travelling. To mitigate the high cost for deploying dense roadside units (RSUs), vehicle-to-vehicle (V2V) communications can complement vehicle-to-infrastructure (V2I) communications to compensate for intermittent connectivity and enhance transmission performance. In this paper, we analyze a location-aware opportunistic V2V relay scheme in terms of the transmission success probability for a target destination vehicle and the connectivity probability when the scheme is applied to inter-connect adjacent RSUs. The analytical approach based on stochastic geometry captures the effects of key system parameters such as vehicle density, RSU coverage, and modulation schemes. It can be used to adapt the forwarding probabilities of relay vehicles with the network conditions. The numerical and simulation results demonstrate the accuracy of the analysis and the effectiveness of V2V relay scheme.