“…The problem was formulated by Lagrangian duality to compute an optimal power for wireless users. In [40], the authors proposed a joint power and frequency allocation scheme for Self-Organizing OFDMA Femtocell Networks using Foschini-Miljanic algorithm. A frequency allocation method was presented in [41] for 5G HetNet using master-slave algorithm in which works are assigned to the slave nodes by the master node.…”