# System Outage Performance for Three-Step Two-Way Energy Harvesting DF Relaying

## TL;DR

This paper introduces dynamic power splitting and adaptive power allocation schemes to enhance outage performance in three-step two-way energy harvesting relay networks, demonstrating significant improvements over existing methods.

## Contribution

It proposes novel dynamic schemes for power splitting and power allocation that adapt to channel conditions, improving system outage performance in energy harvesting relay networks.

## Key findings

- Proposed dynamic PS scheme reduces outage probability.
- Improved dynamic scheme further enhances performance.
- Simulation results confirm superiority over existing schemes.

## Abstract

Wireless energy harvesting (WEH) has been recognized as a promising technique to prolong the lifetime of energy constrained relay nodes in wireless sensor networks. Its application and related performance study in three-step two-way decode-and-forward (DF) relay networks are of high interest but still lack sufficient study. In this paper we propose a dynamic power splitting (PS) scheme to minimize the system outage probability in a three-step two-way energy harvesting DF relay network and derive an analytical expression for the system outage probability with respect to the optimal dynamic PS ratios. In order to further improve the system outage performance, we propose an improved dynamic scheme where both the PS ratios and the power allocation ratio at the relay are dynamically adjusted according to instantaneous channel gains. The corresponding system performance with the improved dynamic scheme is also investigated. Simulation results show that our proposed schemes outperform the existing scheme in terms of the system outage performance and the improved dynamic scheme is superior to the dynamic PS scheme.