Outage Minimization for a Fading Wireless Link with Energy Harvesting Transmitter and Receiver

LANGUAGE
English
SOURCE
IEEE Journal on Sel. Area Commun., .
Published Date:2015-02
ABSTRACT
This paper studies online power control policies
for outage minimization in a fading wireless link with energy
harvesting transmitter and receiver. The outage occurs when
either the transmitter or the receiver does not have enough
energy, or the channel is in outage, where the transmitter only
has the channel distribution information. Under infinite battery
capacity and without retransmission, we prove that thresholdbased
power control policies are optimal. We thus propose
disjoint/joint threshold-based policies with and without battery
state sharing between the transmitter and receiver, respectively.
We also analyze the impact of practical receiver detection and
processing on the outage performance. When retransmission is
considered, policy with linear power levels is adopted to adapt the
power thresholds per retransmission.With finite battery capacity,
a three dimensional finite state Markov chain is formulated to
calculate the optimal parameters and corresponding performance
of proposed policies. The energy arrival correlation between
the transmitter and receiver is addressed for both finite and
infinite battery cases. Numerical results show the impact of
battery capacity, energy arrival correlation and detection cost
on the outage performance of the proposed policies, as well
as the tradeoff between the outage probability and the average
transmission times.