Abstract
This paper investigates the impact of unreliable backhaul and channel estimation error on the performance of small-cell networks over independent and identically distributed Nakagami-m fading channels. To overcome the impact of these practical constraints, we propose an optimal selection scheme where the best small cell with respect to the maximal secrecy capacity is selected. The secrecy outage probability for the considered scheme is derived and compared with Monte-Carlo simulations. To gain additional insights on the impact of unreliable backhaul and imperfect channel estimation, the asymptotic behaviour of secrecy outage probability is also obtained.