Energy-Efficient Cooperative Protocols for Full-Duplex Relay Channels

TL;DR

This paper introduces an incremental selective decode-and-forward protocol for full-duplex relay channels that improves energy efficiency and maintains outage performance, validated through theoretical analysis and simulations.

Contribution

It proposes an enhanced protocol that reduces power consumption in FDR systems while preserving outage performance, extending previous selective decode-and-forward schemes.

Findings

The new protocol achieves additional power savings compared to existing schemes.

Theoretical analysis matches simulation results, confirming the protocol's effectiveness.

Relay power savings are significant compared to non-selective cooperation.

Abstract

In this work, energy-efficient cooperative protocols are studied for full-duplex relaying (FDR) with loopback interference. In these protocols, relay assistance is only sought under certain conditions on the different link outages to ensure effective cooperation. Recently, an energy-efficient selective decode-and-forward protocol was proposed for FDR, and was shown to outperform existing schemes in terms of outage. Here, we propose an incremental selective decode-and-forward protocol that offers additional power savings, while keeping the same outage performance. We compare the performance of the two protocols in terms of the end-to-end signal-to-noise ratio cumulative distribution function via closed-form expressions. Finally, we corroborate our theoretical results with simulation, and show the relative relay power savings in comparison to non-selective cooperation in which the relay cooperates regardless of channel conditions.