@article{M234FF2E6,
title = "Opportunistic Uplink NORA for LEO Satellite-Based IoT Networks",
journal = "The Journal of Korean Institute of Communications and Information Sciences",
year = "2025",
issn = "1226-4717",
doi = "10.7840/kics.2025.50.9.1405",
author = "Young Jin Han, Ki-Hun Lee, Bang Chul Jung",
keywords = "low-earth orbit (LEO) satellite, IoT, network, non-orthogonal random, access (NORA), opportunistic, transmission",
abstract = "In this paper, we propose an opportunistic non-orthogonal random access (O-NORA) system for low-earth orbit (LEO) satellite-based uplink internet- of-things (IoT) networks. Each IoT device on the ground transmits a packet only when its channel gain exceeds a predefined threshold, which is determined by the transmission probability. The LEO satellite then decodes the transmitted signals using simultaneous non-unique decoding (SND) method.
Simulation results show that the proposed O-NORA system significantly outperforms existing non-orthogonal random access (NORA) systems based on fully random transmission."
}