An Asynchronous Collision-Tolerant ACRDA Scheme Based on Satellite-Selection Collaboration-Beamforming for LEO Satellite IoT Networks

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) net...

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Bibliographic Details
Published in:Sensors (Basel, Switzerland) Switzerland), 2023-03, Vol.23 (7), p.3549
Main Authors: Hong, Tao, Liu, Rui, Liu, Ziwei, Ding, Xiaojin, Zhang, Gengxin
Format: Article
Language:English
Subjects:
Algorithms
Artificial satellites
Avalanches
Beamforming
Collaboration
collaboration-beamforming
collision-tolerant
Cooperation
Internet of Things
LEO satellite IoT networks
Low earth orbit satellites
Low earth orbits
Protocol
random access
Satellite communications
satellite-selection
Search algorithms
Signal processing
Spread spectrum
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Summary: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.
ISSN:1424-8220
1424-8220
DOI:10.3390/s23073549