Secrecy Throughput in Inhomogeneous Wireless Networks with Nonuniform Traffic

Abstract

We investigate the secrecy throughput of inhomogeneous wireless network, especially in cases of independent and uniform eavesdropper with single antenna and multiple antennas. Towards the inhomogeneous distribution of legitimate nodes, we novelly construct a circular percolation model under the idea of transforming "inhomogeneous" to "homogeneous. " Correspondingly, the information is transmitted by two ways: intracluster transmission and intercluster transmission. For intracluster transmission, a per-node secrecy throughput of Ω(√1/ 1−V (1 − V)log ) is derived by circular percolation model, where and V represent the number of nodes and clusters in the network, respectively. As for intercluster case, a connection called "information pipelines" is built. Then the per-node secrecy throughput of Ω (√Φ/√ ) can be obtained, where Φ denotes the minimum node density in the network. Moreover, when the eavesdropper is equipped with Ψ( ) antennas, the per-node secrecy throughput of Ω(√1/ 1−V (1 − V)log Ψ −2/ ( )) and Ω((√Φ/√ )Ψ −2/ ( )) is achieved for intracluster and intercluster transmission, respectively.

Secrecy outage of SWIPT in the presence of cooperating eavesdroppers

“…Apart from the secrecy outage probability, another metric for evaluating secrecy performance is the secrecy throughput defined as the minimum rate guaranteed to be supported by all legitimate users [14]. Recalling the classical Wyner model for the case of non-adaptive on-off transmission, i.e., R s remains constant during the transmission and is independent of γ l s , the secrecy throughput can then be written as [15] τ…”