# Performance Analysis and Enhancements for In-Band Full-Duplex Wireless Local Area Networks

## TL;DR

This paper develops an analytical model for IBFD WLANs, proposes frame aggregation schemes to improve throughput and latency, and confirms their effectiveness through simulations, demonstrating IBFD's potential benefits.

## Contribution

It introduces a comprehensive DTMC-based model for IBFD WLANs and proposes frame aggregation schemes that significantly enhance performance metrics.

## Key findings

- Frame aggregation increases throughput by up to 24%.
- Frame aggregation reduces latency by up to 47%.
- IBFD alone cannot minimize latency without aggregation.

## Abstract

In-Band Full-Duplex (IBFD) is a technique that enables a wireless node to simultaneously transmit a signal and receive another on the same assigned frequency. Thus, IBFD wireless systems can provide up to twice the channel capacity compared to conventional Half-Duplex (HD) systems. In order to study the feasibility of IBFD networks, reliable models are needed to capture anticipated benefits of IBFD above the physical layer (PHY). In this paper, an accurate analytical model based on Discrete-Time Markov Chain (DTMC) analysis for IEEE 802.11 Distributed Coordination Function (DCF) with IBFD capabilities is proposed. The model captures all parameters necessary to calculate important performance metrics which quantify enhancements introduced as a result of IBFD solutions. Additionally, two frame aggregation schemes for Wireless Local Area Networks (WLANs) with IBFD features are proposed to increase the efficiency of data transmission. Matching analytical and simulation results with less than 1% average errors confirm that the proposed frame aggregation schemes further improve the overall throughput by up to 24% and reduce latency by up to 47% in practical IBFD-WLANs. More importantly, the results assert that IBFD transmission can only reduce latency to a suboptimal point in WLANs, but frame aggregation is necessary to minimize it.