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Outage Aware Power Control for Vehicular Wireless Energy Transfer Over Dynamic Channels

Wireless powered devices suffer from dynamic energy arrival in case of fast fading channel conditions caused by high mobility of the energy base station (BS), which may lead to energy outage for practical applications executed at the wireless device (WD). We use effective bandwidth theory to investigate the tail distribution of the WD's energy queue, from which the energy outage probability (EOP) is derived. Then, a power control problem is proposed to minimize the mobile vehicular BS's transmit power while guaranteeing the EOP for the WD, which can be equivalently addressed by solving a single equation. The match between simulation results and theoretical analysis demonstrates the validity of the proposed EOP analysis. Furthermore, the proposed scheme can reduce the power consumption of the vehicular BS while guaranteeing EOP requirement of the WD.