Fig. 3From: 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 II where λ d =0.001/m 2, ϕ=0.6. Figure 3 shows the close-form expression and asymptotic expression of the secrecy outage probability of the typical cellular link in scenario IIBack to article page