Improving IoT-Over-Satellite Connectivity Using Frame Repetition Technique

Through Non-Terrestrial Networks (NTN), a global coverage connecting areas with minimal or no terrestrial services is envisaged using satellite and air-borne platforms. However, one of the challenges to delivering NTN communications is the increased levels of path-loss, relative to typical terrestrial scenarios, due to the vast communication distance towards satellite platforms. Typically, cellular IoT technologies adopt frame repetitions where many redundant data transmissions are included to enhance its success rate. This can be also extended to satellite links to counter the effect of long distance communications on the link budget. In this letter, we put forth an analytic framework that captures the repetition behavior based on the probability of line-of-sight (LoS), as it heavily influences the propagation conditions. We analyze the coverage performance in terms of the frame success rate, which allows us to tune the repetitions behavior to suit a given satellite admittance region. Furthermore, we obtain an optimal global average success rate by considering the availability of satellites. The presented framework can facilitate coverage enhancements for IoT-over-Satellite networks.

Automated summary

Non-Terrestrial Networks (NTN) aims to provide global coverage in areas with limited terrestrial services using satellite and air-borne platforms. However, the long communication distance to satellite platforms leads to increased path-loss, posing a challenge to delivering NTN communications. This letter presents an analytic framework that captures the repetition behavior based on the probability of line-of-sight (LoS), allowing for coverage enhancements and optimization of frame success rate in IoT-over-Satellite networks.