Colluding Eavesdropping Sample Clauses

Colluding Eavesdropping. In Fig. 3.4, we study the effect of the number of users served per resource block on the small-cell network DL and UL PHYLS performances under a Poisson field of colluding EDs. The trends previously highlighted in the case of passive PPP- based EDs also apply here. In particular, increasing the number of UEs served per cell deceases the per-user ergodic secrecy rate and increases the area ergodic secrecy rate, respectively. Also, in the case of large-scale ED collusion, the FD over HD small-cell network PHYLS performance gain decreases if we simultaneously increase the number of DL and UL UEs served per cell. On the other hand, for a given number of UL UEs in a cell, increasing the number of DL UEs served per resource block results in higher relative FD versus HD DL ergodic secrecy rate (and vice versa). FD (w/ SIC) FD (w/o SIC) HD MC 8 7 DL Ergodic Secrecy Rate [b/s/Hz] 1 Number of DL UEs per Cell FD (w/o SI) FD (NLOS SI) HD MC UL Ergodic Secrecy Rate [b/s/Hz] Number of UL UEs per Cell Figure 3.3: Impact of the number of UEs on the small-cell network PHY-layer se- curity performance in the presence of a Poisson field of passive EDs. π System parameters are: λd = 4 km−2, λu = Kuλd km−2, λe = λd km−2, Nd = Nu = 10, pd = 23 dBm, pu = 20 dBm, W = 10 MHz, o i c σ 2 = σ 2 = σ 2 = σ 2 = −170 dBm/Hz, α = 4. FD (w/ SIC) FD (w/o SIC) HD MC 10 DL Ergodic Secrecy Rate [b/s/Hz] Number of DL UEs per Cell FD (w/o SI) FD (NLOS SI) HD MC UL Ergodic Secrecy Rate [b/s/Hz] Number of UL UEs per Cell Figure 3.4: Impact of the number of UEs on the small-cell network PHY-layer security performance in the presence of a Poisson field of colluding