Hybrid relay protocol design based on NOMA

In this paper, there is a mixed access method that links many things to the narrowband internet of things (NB-IoT). It uses both non-orthogonal multiple access (NOMA) and orthogonal multiple access (OMA). Working together in a single decode-and-forward (DF) or amplify-and-forward (AF) way loses a lot of time and space. It also suggests a new Hybrid NOMA gearbox plan with relay-adaptively chosen teamwork. The steady-state probability is used to find the closed formulas for the output and the chance that the system will break down. We improve the process above even more by letting the parent node send the failed received overlay signals more than once. It is less likely that there will be an outage when there are more than one resends that can be made. The suggested adaptable joint hybrid NOMA transmission strategy is better than the pure OMA transmission mode in a number of ways.