Abstract
Satellites enable the provision of global 5G coverage utilizing an customized protocol stack for direct access of 5G devices. This paper reports the results of a field trial based on an Open Source Software 5G protocol stack modified for Satellite Communications. 5G New Radio functions have been adapted to support 3GPP Non-Terrestrial Networks standardization for Release 17. Some of the currently discussed enhancements for 5G New Radio direct access for Non-Terrestrial Networks were evaluated in this study over a geosynchronous spacecraft. Non-Terrestrial Networks devices and base station were software-defined solutions communicating via satellite through a standardized 5G New Radio waveform. The results show that Open Source Software implementations running on general purpose platforms greatly support the research and standardization process for Non-Terrestrial Networks in 5G-Beyond. Non-Terrestrial Networks functions can be evaluated at an early stage over channel emulators or real world satellites to highlight the capabilities of space based 5G-Beyond networks. Therefore, Open Source Software can be a starting point to turn the vision of 6G protocols on-board the satellite into reality.
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