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In this paper, we propose an optimization method for the broadcast rate invehicle-to-vehicle (V2V) broadcast communications at an intersection on thebasis of theoretical analysis. We consider a model in which locations ofvehicles are modeled separately as queuing and running segments and derive keyperformance metrics of V2V broadcast communications via a stochastic geometryapproach. Since these theoretical expressions are mathematically intractable,we developed closed-form approximate formulae for them. Using them, we optimizethe broadcast rate such that the mean number of successful receivers per unittime is maximized. Because of the closed form approximation, the optimal ratecan be used as a guideline for a real-time control-method, which is notachieved through time-consuming simulations. We evaluated our method throughnumerical examples and demonstrated the effectiveness of our method.

Theoretical Performance Analysis of Vehicular Broadcast Communications at Intersection and their Optimization