Communication Dans Un Congrès Année : 2025

Increasing the throughput of Direct-to-Satellite Narrowband IoT networks

Résumé

The design of a Direct-to-Satellite (DtS) network infrastructure based on the availability of Low Earth Orbit (LEO) satellite constellations has recently emerged as a key enabler of global Internet of Things (IoT) connectivity. In this context, Narrowband IoT (NB-IoT) communications can be leveraged as a standards-based DtS solution that can grant reliable data collection in areas not reachable by traditional terrestrial IoT networks. However, the large coverage area of satellites and the limited connection time increase the probability of collisions during the NB-IoT Random Access (RA) procedure. This is especially true when many concurrent User Equipments (UEs) attempt to access the network simultaneously during the RA procedure. In this sense, the goal of this contribution is to show that the first message exchange between UEs and NB-IoT equipped LEO satellites (i.e., an uplink Msg1 frame followed by a downlink Msg2 frame) can be exploited by UEs to decide whether to try transmitting data into an uplink Msg3 frame or not. Herein, 2 early collision detection methods able to improve the RA success rate in satellite NB-IoT systems are presented. In detail, for both methods UEs estimate their relative position to the satellite and apply a corresponding time shift when transmitting Msg1. By comparing the Time Advance (TA) value received in Msg2 with their expected TA, UEs can determine whether to proceed with Msg3. The Closest First Method (CFM) requires no changes to the satellite and only uses the TA value of the first received Msg1. Instead, the Non-collided First Method (NFM) assumes the satellite can identify individual Msg1 transmissions and responds only to non-collided ones. Some preliminary simulation results show that both methods increase the number of successful accesses compared to the standard approach, even in the presence of position estimation errors.

Fichier principal
Vignette du fichier
Increasing_the_throughput_of_Direct_to_Satellite_Narrowband_IoT_networks (2).pdf (648.54 Ko) Télécharger le fichier
Origine Fichiers produits par l'(les) auteur(s)
Licence

Dates et versions

hal-05288872 , version 1 (29-09-2025)

Licence

Identifiants

Citer

Zheng Zhou, Nicola Accettura, Pascal Berthou. Increasing the throughput of Direct-to-Satellite Narrowband IoT networks. IEEE Conference on Standards for Communications and Networking (CSCN 2025), Sep 2025, Bologne, Italy. ⟨10.1109/CSCN67557.2025.11230690⟩. ⟨hal-05288872⟩
1028 Consultations
218 Téléchargements

Altmetric

Partager

  • More