Robust Power Control in TDMA-based Vehicular Communication Network

This paper proposes a robust power control algorithm to optimize the sum utility of TDMA-enabled vehicular communications underlaying a cellular system, where the uplink channel allocated to one cellular user(CU) is reused by the multiple vehicle-to-vehicle(V2V) links. Unlike the traditional static vehicular communication network, a mobile-cluster model is established with high mobility. Considering channel uncertainty, we construct an optimization problem of maximizing user utilities under the constraints of the outage probability and the error rate in signal transmission. Furthermore, the uncertain probability constraints are transformed into the deterministic ones by the method of integral transformation, and a distributed power allocation algorithm is proposed to determine the optimal solutions. Numerical simulations show that the proposed algorithm is convergent and effective in dynamic vehicle environment with high vehicle density, strong node mobility and fast network topology change.