149014 20250124153131.0 doi 10.1109/TWC.2019.2910512 sideral 112671 ART-2019-112671 eng Ortín, Jorge (orcid)0000-0001-9052-9554 Augmenting LoRaWAN Performance With Listen Before Talk 2019 Standard LoRaWANs leverage pure ALOHA at the medium access control layer, which is proved to be a performance bottleneck as the network size scales up. Stimulated by this fact, this paper studies the applicability and the performance of listen before talk (LBT) medium access schemes in the context of LoRaWANs. We consider two different implementations of LBT: physical layer LBT based on energy detection only and MAC layer LBT based on layer 2 frame decoding, and we propose a Markovian framework to evaluate the performance of LoRaWANs under such setting in terms of data extraction rate and average delay experienced by transmitted uplink messages. The proposed framework is also leveraged to assess the performance of "mixed" LoRaWAN scenarios, where some devices access the channel according to the standard-compliant ALOHA protocol, while other devices transmit according to LBT. Access copy available to the general public Unrestricted info:eu-repo/grantAgreement/ES/DGA/T31-17R info:eu-repo/grantAgreement/ES/MEC/CAS17-00624 info:eu-repo/grantAgreement/ES/UZ/CUD2018-03 info:eu-repo/grantAgreement/ES/UZ/UZ2018-TEC-04 info:eu-repo/semantics/openAccess All rights reserved http://www.europeana.eu/rights/rr-f/ 6.779 2019 TELECOMMUNICATIONS 8 / 89 = 0.09 2019 Q1 T1 ENGINEERING, ELECTRICAL & ELECTRONIC 20 / 265 = 0.075 2019 Q1 T1 2.623 2019 Applied Mathematics 2019 Q1 Electrical and Electronic Engineering 2019 Q1 Computer Science Applications 2019 Q1 info:eu-repo/semantics/article info:eu-repo/semantics/acceptedVersion Cesana, Matteo Redondi, Alessandro 18, 6 (2019), 3113-3128 IEEE Trans. Wirel. Commun. IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS 1536-1276 425621 http://zaguan.unizar.es/record/149014/files/texto_completo.pdf Postprint 3269717 http://zaguan.unizar.es/record/149014/files/texto_completo.jpg?subformat=icon icon Postprint oai:zaguan.unizar.es:149014 articulos driver 2025-01-24-14:49:01 ARTICLE