Broadcasting with an Energy Harvesting Rechargeable Transmitter

In this paper, we investigate the transmission completion time minimization problem in a two-user additive white Gaussian noise (AWGN) broadcast channel, where the transmitter is able to harvest energy from the nature, using a rechargeable battery. The harvested energy is modeled to arrive at the transmitter randomly during the course of transmissions. The transmitter has a fixed number of packets to be delivered to each receiver. Our goal is to minimize the time by which all of the packets for both users are delivered to their respective destinations. To this end, we optimize the transmit powers and transmission rates intended for both users. We first analyze the structural properties of the optimal transmission policy. We prove that the optimal total transmit power has the same structure as the optimal single-user transmit power [1], [2]. We also prove that there exists a cut-off power level for the stronger user. If the optimal total transmit power is lower than this cut-off leve...

• Type: Journal
• Year: 2010
• Where: CORR
• Authors: Jing Yang, Omur Ozel, Sennur Ulukus
• Keywords: CORR 2010, Education, Optimal Single-user Transmit, Optimal Total, Transmit Power