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Ambient IoT: Backscatter-Based Connectivity Topologies and Outage Behavior
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A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
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en
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14
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IEEE Transactions on Cognitive Communications and Networking, Volume 12, pp. 2369-2382
Abstract
Advancements in low-power and cost-effective backscatter communications are enhancing connectivity for battery-constrained devices, as highlighted by 3GPP’s recent ambient Internet-of-Things (A-IoT) study. This paper presents a comprehensive analysis of the outage behavior exhibited by various A-IoT backscatter communication topologies, including direct connection with the base station (Topology 1), relay-assisted backscattering (Topology 2), and user equipment-assisted backscattering (Topology 3). For each topology, the outage event is characterized and the outage probability expression is derived. Additionally, asymptotic analysis is performed to study the outage behavior of each topology at high transmit SNR γo. The results show that at high SNR, the outage probability scales as (1/√γ o) for Topology 1 with symmetric channel, (1/γ o 3/2) for Topology 2, and (1/γ o) for Topology 3 and Topology 1 with frequency division duplex (FDD) transmission. Through analytical modeling and extensive simulations, our study provides insights into the outage behaviors of these topologies. It is found that the distance of the backscatter link significantly affects outage performance across these topologies. Specifically, Topology 2 shows robust performance, extending coverage at the cost of increased complexity. In contrast, Topology 3 is more efficient over longer communication ranges by leveraging existing cellular networks. Moreover, the impact of backscatter coefficient and target transmission rate on performance is investigated.
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Publisher Copyright: © 2015 IEEE. | openaire: EC/HE/101095759/EU//Hexa-X-II
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Al-Nahari, A, Jäntti, R, Mishra, D & Zhou, Y 2026, 'Ambient IoT: Backscatter-Based Connectivity Topologies and Outage Behavior', IEEE Transactions on Cognitive Communications and Networking, vol. 12, pp. 2369-2382. https://doi.org/10.1109/TCCN.2025.3586219