Optimal deployment of wireless small cell base stations with security considerations

In this paper, we investigate the problem of placing small cell base stations (SCBSs) in adversarial heterogeneous wireless networks. We consider a continuum of wireless users facing potential eavesdropping and jamming attacks. For each such attack, we first propose a suitable utility function for the wireless users. Then, we propose a novel optimal placement algorithm for finding the optimal locations of the SCBSs given the underlying security considerations. In eavesdropping scenarios, we consider the prospective eavesdroppers to be spread over a given region. The SCBSs are then placed in such a way to minimize the eavesdroppers´ effect without having any information about their exact locations. In jamming scenarios, we consider a cost constrained jammer to be present in the network. The SCBSs are then placed in order to minimize the effect of the jammer´s signal on the quality of the user´s transmission. We simulate the developed algorithm for both types of attacks and for various network configurations. Simulation results show that the proposed solution approach yields significant improvements in the spatial SINR of all users when compared with conventional placement techniques.