“…Recently, the physical layer security for 5G NOMA in stochastic geometry networks was considered in [12]. Later, an extension of [12] was presented in [13] where two different structures were proposed to improve the secrecy performance for singleantenna and multiple-antenna stochastic geometry networks, respectively. In [14], a new design of NOMA under secrecy considerations was proposed and the optimal designs of decoding order, transmission rates, and power allocated to each user were investigated.…”