LR-FHSS Networks With Orthogonal Physical Channels for Headers and Payload Fragments
Sant’Ana, Jean Michel de Souza; dos Santos, Elço João; Rebelatto, João Luiz; Mikhaylov, Konstantin; Alves, Hirley; Souza, Richard Demo (2025-05-23)
IEEE
23.05.2025
J. M. d. S. Sant’Ana, E. J. dos Santos, J. L. Rebelatto, K. Mikhaylov, H. Alves and R. D. Souza, "LR-FHSS Networks With Orthogonal Physical Channels for Headers and Payload Fragments," in IEEE Internet of Things Journal, doi: 10.1109/JIOT.2025.3573149
https://creativecommons.org/licenses/by/4.0/
This work is licensed under a Creative Commons Attribution 4.0 License. For more information, see https://creativecommons.org/licenses/by/4.0/
https://creativecommons.org/licenses/by/4.0/
This work is licensed under a Creative Commons Attribution 4.0 License. For more information, see https://creativecommons.org/licenses/by/4.0/
https://creativecommons.org/licenses/by/4.0/
Julkaisun pysyvä osoite on
https://urn.fi/URN:NBN:fi:oulu-202505284000
https://urn.fi/URN:NBN:fi:oulu-202505284000
Tiivistelmä
Abstract
This paper introduces an enhancement to the Long-Range Frequency-Hopping Spread Spectrum (LR-FHSS), a modulation within the LoRaWAN specification, particularly useful in dense networks supported by satellite gateways. LR-FHSS replicates headers and payload fragments across different physical channels, but the distinct transmission strategies for headers and payloads can lead to uneven success rates and degrading performance. To address this, we propose a scheme that allocates orthogonal physical channels for headers and payloads. Through analytical and simulation results, considering factors such as payload size and the number of users, we identify the optimal distribution of channels between headers and payloads to maximize success probability. The proposed scheme significantly improves performance, supporting up to 50% more users at the same reliability level as the standard LR-FHSS.
This paper introduces an enhancement to the Long-Range Frequency-Hopping Spread Spectrum (LR-FHSS), a modulation within the LoRaWAN specification, particularly useful in dense networks supported by satellite gateways. LR-FHSS replicates headers and payload fragments across different physical channels, but the distinct transmission strategies for headers and payloads can lead to uneven success rates and degrading performance. To address this, we propose a scheme that allocates orthogonal physical channels for headers and payloads. Through analytical and simulation results, considering factors such as payload size and the number of users, we identify the optimal distribution of channels between headers and payloads to maximize success probability. The proposed scheme significantly improves performance, supporting up to 50% more users at the same reliability level as the standard LR-FHSS.
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