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- Title
An Asynchronous Collision-Tolerant ACRDA Scheme Based on Satellite-Selection Collaboration-Beamforming for LEO Satellite IoT Networks.
- Authors
Hong, Tao; Liu, Rui; Liu, Ziwei; Ding, Xiaojin; Zhang, Gengxin
- Abstract
In this paper, an asynchronous collision-tolerant ACRDA scheme based on satellite-selection collaboration-beamforming (SC-ACRDA) is proposed to solve the avalanche effect caused by packet collision under random access (RA) high load in the low earth orbit (LEO) satellite Internet of Things (IoT) networks. A non-convex optimization problem is formulated to realize the satellite selection problem in multi-satellite collaboration-beamforming. To solve this problem, we employ the Charnes-Cooper transformation to transform a convex optimization problem. In addition, an iterative binary search algorithm is also designed to obtain the optimization parameter. Furthermore, we present a signal processing flow combined with ACRDA protocol and serial interference cancellation (SIC) to solve the packet collision problem effectively in the gateway station. Simulation results show that the proposed SC-ACRDA scheme can effectively solve the avalanche effect and improve the performance of the RA protocol in LEO satellite IoT networks compared with benchmark problems.
- Subjects
INTERNET of things; BENCHMARK problems (Computer science); SIGNAL processing; SEARCH algorithms; ASYNCHRONOUS learning; ORBITS (Astronomy); MACHINE-to-machine communications; TELECOMMUNICATION satellites
- Publication
Sensors (14248220), 2023, Vol 23, Issue 7, p3549
- ISSN
1424-8220
- Publication type
Article
- DOI
10.3390/s23073549