Intelligent Beam-Hopping-Based Grant-Free Random Access in Secure IoT-Oriented Satellite Networks

Area of Science:

• Satellite Communications
• Internet of Things (IoT)
• Wireless Networking

Background:

• Challenges in massive device connectivity for IoT in LEO satellite networks.
• Need for low latency and high reliability in next-generation IoT applications.
• Limitations of existing random access schemes in dynamic LEO environments.

Purpose of the Study:

• To propose an intelligent beam-hopping-based grant-free random access (BH-GFRA) architecture for secure IoT communications in LEO satellite networks.
• To enhance access efficiency and reduce resource collisions.
• To address irregular and dynamic traffic patterns.

Main Methods:

• Implementation of three resource-hopping schemes: random, group, and orthogonal group hopping.
• Utilization of orthogonal resource allocation algorithms for efficient resource sharing.
• Proposal of an activity mechanism based on spatio-temporal device distribution.
• Mathematical analysis of system performance, including access delay and success rate.

Main Results:

• Demonstrated improvement in connection stability and access efficiency for 6G IoT satellite networks.
• Effective handling of massive connections under satellite-terrestrial delay and interference.
• Validation of the BH-GFRA scheme's capability to serve a substantial number of IoT devices.

Conclusions:

• The proposed BH-GFRA architecture significantly enhances performance for IoT communications in LEO satellite networks.
• The scheme meets the rigorous demands of next-generation IoT applications requiring high reliability and efficiency.
• Beam-hopping GFRA offers a promising solution for secure and efficient massive IoT connectivity in LEO environments.