Main Article Content
To enhance network performance in cooperative communication, the relay selection methods have been used with significant effects. In this paper, we study two-way relay networks using the partial relay selection and non-orthogonal multiple access protocol (NOMA) with successive interference cancellation (SIC). In the paper, the investigated model includes two end-users in a transmission condition with high loss due to fading or obstacles so there is no direct transmistion line between them, their connectivity is only performed through a cluster of decode-forward (DF) relay in haft duplex mode (HD). We discuss and analyze the outage probability of system by selecting a relay with the greatest gain. Next, system performance is surveyed according to signal to noise ratio (SNR). Finally, mathematical expressions in the paper are verified by Monte-Carlo simulation method using Matlab.