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An Asynchronous Collision-Tolerant ACRDA Scheme Based on Satellite-Selection Collaboration-Beamforming for LEO
Tao Hong1, Rui Liu1, Ziwei Liu1
1School of Communications and Information Engineering, Nanjing University of Posts and Telecommunications, Nanjing 210003, China.
Sensors (Basel, Switzerland)
|April 13, 2023
Summary
This study introduces a new satellite-selection collaboration-beamforming (SC-ACRDA) scheme to prevent packet collision issues in low Earth orbit (LEO) satellite Internet of Things (IoT) networks, improving random access performance.
Area of Science:
- Satellite Communications
- Internet of Things (IoT)
- Wireless Networking
Background:
- Low Earth Orbit (LEO) satellite networks face significant packet collision challenges under high random access loads.
- The avalanche effect, caused by collisions, severely degrades network performance in LEO satellite IoT.
Purpose of the Study:
- To propose an asynchronous collision-tolerant scheme for LEO satellite IoT networks.
- To mitigate the avalanche effect caused by packet collisions during random access.
Main Methods:
- Developed a satellite-selection collaboration-beamforming (SC-ACRDA) scheme.
- Formulated and solved a non-convex optimization problem for satellite selection using Charnes-Cooper transformation and binary search.
- Integrated the ACRDA protocol with serial interference cancellation (SIC) for signal processing.
Main Results:
- The proposed SC-ACRDA scheme effectively resolves the avalanche effect in LEO satellite IoT networks.
- Demonstrated significant performance improvements in random access protocols compared to existing benchmarks.
- Validated the scheme's efficacy through simulation results.
Conclusions:
- The SC-ACRDA scheme offers a robust solution for collision tolerance in LEO satellite IoT.
- This approach enhances the reliability and efficiency of random access in satellite-based IoT systems.
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