LR-FHSS: Overview and Performance Analysis

TL;DR

LR-FHSS is a new physical layer protocol designed for long-range, large-scale IoT communication, offering higher capacity and QoS management, with performance analysis highlighting its advantages and limitations.

Contribution

This paper provides a comprehensive overview and performance analysis of LR-FHSS, a novel physical layer for long-range IoT communication, detailing its operation, benefits, and research challenges.

Findings

LR-FHSS achieves higher network capacity than traditional methods.

It enables QoS policies on a per-packet basis.

Performance analysis reveals its strengths and limitations.

Abstract

Long Range-Frequency Hopping Spread Spectrum (LR-FHSS) is the new physical layer designed to address extremely long-range and large-scale communication scenarios, such as satellite IoT. At its core is a fast frequency hopping technique designed to offer higher network capacity while offering the same radio link budget as LoRa. Additionally, LR-FHSS finely manages packet transmission thanks to its design principles, enabling QoS policies on a per-packet basis. Given the notorious adoption of LoRaWAN in the IoT application landscape, this article is a reference for understanding how exactly LR-FHSS works, the performance it can offer, and its limitations and research opportunities.