Spectrum resource sharing methodology based on CR-NOMA on the future integrated 6G and satellite network: principle and Open researches

The label "satellite-6G" of today, which is a marketing presentation related to the geopolitical battle of the world, begins to be submitted in research laboratories. The future networks of the sixth generation (6G) will be characterized by an ultra-high speed network access operating in very high frequency ranges such as THz. Satellites since its advent are characterized by the provision of communications services at very long range and also a very wide coverage (covering white areas). In order to combine these main characteristics, the concept of integrated terrestrial and satellite communication networks has emerged and become a field of research for scientists. Thus, the integrated satellite-terrestrial networks aim to provide several services with a powerful access allowing to send and receive a large amount of data in any position and circumstances. It is essential to put forward efficient spectrum management techniques for spectrum exploitation in the integrated network. In this paper, a new approach to improve the performance of NOMA-TCR spectrum sharing, will be investigated. Cognitive Radio Technology (TCR) enables dynamic spectrum sharing. The NOMA technique is the most suitable to be used in 6G because it improves the spectrum performance by allowing multiple transmitters to send their signals on the same resource block by distinguishing them through the power domain. This paper will open up several areas of research in integrated networks. Also the research challenges that this new network configuration can bring will be developed.