  Energy harvesting (EH) is a promising technology for realizing energy
efficient wireless networks. In this paper, we utilize the ambient RF energy,
particularly interference from neighboring transmissions, to replenish the
batteries of the EH enabled nodes. However, RF energy harvesting imposes new
challenges into the analysis of wireless networks. Our objective in this work
is to investigate the performance of a slotted Aloha random access wireless
network consisting of two types of nodes, namely Type I which has unlimited
energy supply and Type II which is solely powered by an RF energy harvesting
circuit. The transmissions of a Type I node are recycled by a Type II node to
replenish its battery. We characterize an inner bound on the stable throughput
region under half-duplex and full-duplex energy harvesting paradigms as well as
for the finite capacity battery case. We present numerical results that
validate our analytical results, and demonstrate their utility for the analysis
of the exact system.
