# Energy harvesting wireless networks with correlated energy sources

## TL;DR

This paper analyzes a wireless network with two energy harvesting nodes that have correlated energy sources, developing a threshold-based policy to maximize throughput without prior channel or energy info.

## Contribution

It introduces a novel threshold-based transmission policy for correlated EH nodes and derives optimal thresholds for specific practical scenarios.

## Key findings

- Optimal thresholds maximize network throughput.
- Throughput analysis under different energy correlation scenarios.
- Policy effectiveness demonstrated for practical energy harvesting conditions.

## Abstract

This work considers a system with two energy harvesting (EH) nodes transmitting to a common destination over a random access channel. The amount of harvested energy is assumed to be random and independent over time, but correlated among the nodes possibly with respect to their relative position. A threshold-based transmission policy is developed for the maximization of the expected aggregate network throughput. Assuming that there is no a priori channel state or EH information available to the nodes, the aggregate network throughput is obtained. The optimal thresholds are determined for two practically important special cases: i) at any time only one of the sensors harvests energy due to, for example, physical separation of the nodes; ii) the nodes are spatially close, and at any time, either both nodes or none of them harvests energy.