LoRaWAN Link Layer

  • Olivier Seller Technical Fellow, Semtech, and LoRa Alliance® Technical Committee Vice-Chair, Fremont, CA, United States
Keywords: LoRaWAN protocol, medium access control, link layer, network server, adaptive data rate

Abstract

The LoRaWAN Link Layer specification [1] is a communication protocol for the Internet of Things. It targets low power, long range, low cost communication using unlicensed spectrum. Network topology is collaborative, which reduces a lot protocol signalling compared to a cellular network. The device is connected to a network server, and protocol overhead is limited to 13 bytes for any data frame. There are three classes of operation. Class A is optimized for low power operation of end-devices, while class B and class C offer reduced downlink latency. The protocol specification offers several mechanisms to adjust the link layer parameters: adaptive data rate, adaptive power control, variable repetition rate, and channel selection.

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Author Biography

Olivier Seller , Technical Fellow, Semtech, and LoRa Alliance® Technical Committee Vice-Chair, Fremont, CA, United States

Olivier Seller is technical fellow at Semtech, and vice-chair of LoRa Alliance Technical Committee. He is the editor of the LoRaWAN link layer specification since 2019. He is co-inventor of the LoRa technology, and co-founder of Cycleo that developed LoRa initially, his focus was the LoRa modulation and implementation of receivers. Upon acquisition of Cycleo by Semtech in 2012, Olivier architected the LoRa localisation solution, designed the “find my stuff” radio capability of LoRa chips, and co-designed the LR-FHSS modulation.

Olivier studied in Ecole Polytechnique and Telecom Paris, then worked in the telecom and semiconductor industries with experiences in an 802.16 start-up, in Orange Labs, and in Cambridge Silicon Radio.

References

TS001-1.0.4, LoRaWAN Link Layer Specification, LoRa Alliance Technical Committee, October 2020

B. Martinez, F. Adelantado, A. Bartoli, X. Vilajosana, ‘Exploring the Performance Boundaries of NB-IoT’, IEEE Internet of Things Journal, Volume 6, Issue 3, June 2019.

RP002-1.0.2 LoRaWAN Regional Parameters, LoRa Alliance Technical Committee, November 2020

Published
2021-04-30
Section
Articles

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