This Paper presents an evaluation of the performance of non orthogonal multiple access for a two user, Advanced 6G cellular radio communication system. We analyze the bit error rate and outage probability for both near and far users, considering a Nakagami-m fading channel and exploring their dependence on transmission power. As transmit power grows, it is found that the Close user performs noticeably better in terms of BER, whereas the far user’s BER declines more gradually. The far user’s slower BER improvement is attributed to more challenging channel conditions, which limit the effectiveness of NOMA’s power allocation and interference cancellation. Moreover, the outage probability shows diminishing returns for both users at higher transmit power levels (beyond 30–35 dBm). Near users consistently demonstrate superior outage performance compared to far users. These results provide important insights for efficient power management in 6G systems by highlighting the crucial roles that user distance and power allocation play in maximizing NOMA performance.