Cognitive Radio Technologies and Applications in Dynamic Spectrum Access Method

increasingly internets of things applications have emerged in recent years, arranging additional strain on networks. In order to be remotely accessed the internet of things links and controls heterogeneous devices wirelessly. The majority of the devices use licensed wireless spectrum bands. Spectrum insufficiency will soon be a concern, as there will be also much interference between users, resulting in an insufficiency of bandwidth for all of them. It is imperative that the spectrum utilized correctly and efficiently in order to allow the widespread deployment of internet of things systems. Because of this, a new form of radio technology known as Cognitive Radio has emerged. Dynamic Spectrum Utilization techniques such as Cognitive Radio employ the transceiver's intelligence to determine which channels are now in use and which are not currently in service. This way making optimum usage of currently available spectrum while reducing interference between users to a minimum, Cognitive Radio architecture and functions, obstacles in each function of the Cognitive Radio environment, and concerns in Cognitive Radio discussed in detail in this research.