Fig. 2From: Artificial noise-assisted physical layer security in D2D-enabled cellular networksThe secrecy outage probability of the typical cellular link versus the density of the base station λ b under different densities of the eavesdropper λ e in scenario I where λ d =0.001/m 2, ϕ=0.6. Figure 2 illustrates the close-form expression and asymptotic expression of the secrecy outage probability of the typical cellular link in scenario IBack to article page