M. A. Zainali, A. L. Yusof, M. T. Ali, N. Ya’acob, M. Rosdi, and M. S. N. Ali, “Optimization of Adaptive Received Signal Strength Threshold Value by Using Particle Swarm Optimization in Long Term Evolution-Advanced (LTE-A) Network”, JTEC, vol. 9, no. 2-3, pp. 27–31, Jun. 2017.