Methods for Ensuring Effective RF Spectrum Usage in the Organization of IoT Devices Communication

Abstract

The growth in the number of internet of things (IoT) nodes and the increasing demand for bandwidth are driving an increase in demand for radio spectrum and the need to use new methods of managing communications systems. Under certain conditions, the use of dynamic spectrum access based on cognitive technologies can facilitate the efficient use of the radio spectrum. This paper presents the general structure of dynamic spectrum access methods using the functional capabilities of cognitive radio systems. A method for calculating the available radio frequency spectrum in the broadcasting VHF range and a method for sensing the spectrum based on the use of the RTL-SDR software and hardware complex on the Realtek RTL2832U controller and the Rafael Micro R820T tuner have been developed. The combined use of these tools allows you to organize the allocation of communication channels for low-power short-range IoT devices. The research results can be used in the design and operation of communication networks that implement the concept of dynamic access to the frequency spectrum in the broadcasting VHF range, based on cognitive technologies.