  Energy harvesting emerges as a potential solution for prolonging the lifetime
of the energy-constrained mobile wireless devices. In this paper, we focus on
Radio Frequency (RF) energy harvesting for multiuser multicarrier mobile
wireless networks. Specifically, we propose joint data and energy transfer
optimization frameworks for powering mobile wireless devices through RF energy
harvesting. We introduce a power utility that captures the power consumption
cost at the base station (BS) and the used power from the users' batteries, and
determine optimal power resource allocations that meet data rate requirements
of downlink and uplink communications. Two types of harvesting capabilities are
considered at each user: harvesting only from dedicated RF signals and hybrid
harvesting from both dedicated and ambient RF signals. The developed frameworks
increase the end users' battery lifetime at the cost of a slight increase in
the BS power consumption. Several evaluation studies are conducted in order to
validate our proposed frameworks.
