# Power Control in Full Duplex Networks: Area Spectrum Efficiency and Energy Efficency

## TL;DR

This paper explores various power control strategies in full-duplex networks, demonstrating significant improvements in spectrum and energy efficiency, and reducing self-interference requirements for better long-distance transmission performance.

## Contribution

It introduces and evaluates multiple power control schemes in FD networks, highlighting their benefits in efficiency and interference mitigation, which is less studied in existing literature.

## Key findings

- Power control schemes significantly enhance area spectrum efficiency.
- Power control improves energy efficiency and fairness between uplink and downlink.
- Reduces the required self-interference cancellation for cell-edge users.

## Abstract

Full-duplex (FD) allows the exchange of data between nodes on the same temporal and spectrum resources, however, it introduces self interference (SI) and additional network interference compared to half-duplex (HD). Power control in the FD networks, which is seldom studied in the literature, is promising to mitigate the interference and improve the performance of the overall network. In this work, we investigate the random and deterministic power control strategies in the FD networks, namely, constant power control, uniform power control, fractional power control and ALOHA-like random on-off power control scheme. Based on the obtained coverage probabilities and their robust approximations, we show that power control provides remarkable gain in area spectrum efficiency (ASE) and energy efficiency (EE), and improves the fairness among the uplink (UL) and downlink (DL) transmissions with respect to the FD networks. Moreover, we evaluate the minimum SI cancellation capability to guarantee the performance of the cell-edge users in FD networks. Generally, power control is helpful to improve the performance of the transmission for long distance in the FD networks and reduce the requirement of SI cancellation capability.