Security Aware Resource Allocation for D2D Communications with cooperative Jamming

Securing communications for D2D underlaying cellular networks by physical layer mechanisms has become an important issue for 5G and beyond. The preference of D2D users and the role of D2D users as cooperative jammers are rarely investigated together in previous works. In this paper, we investigate spectrum resource allocation to maximize system secrecy sum rate and leverage D2D users to cooperatively protect cellular users at high risks of being eavesdropped. The resource allocation problem is formulated as a Mixed-Integer Non-Linear Programming (MINLP) model. We propose a preference-based matching algorithm (PBMA) to tackle the spectrum resource allocation problem. Then, cooperative jamming-based algorithms by D2D users assisted are proposed to further improve the secrecy rate of cellular users. Extensive simulation results demonstrate the effectiveness of proposed schemes in terms of the secrecy sum rate of D2D links and cellular links.