Energy Efficiency Optimization of CoMP C-NOMA System Using Markov Decision Process

In a multi-cell network, the combination of coordinated multipoint (CoMP) transmissions and non-orthogonal multiple access (NOMA) is known to be an effective solution to mitigate inter-cell interference and enhance the data rates of the cell edge users. While the existing studies heavily focus on maximizing the data rate of the cell edge users or the sum rate of the network, however, the energy efficiency has not been thoroughly investigated. In particular, when it comes to amalgamating CoMP with cooperative NOMA (C-NOMA), various system configurations should be considered, which impact both data rate and energy efficiency. Therefore, in this paper, we provide an optimization framework of energy efficiency specifically for the edge user using a Markov decision process (MDP) where the underlying system leverages the benefits of both CoMP and C-NOMA. The simulation results demonstrate the effectiveness of the proposed approach for the joint optimization of data rate and energy efficiency.