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IEEE Wireless Communications Letters

Outage Analysis of Cooperative Secrecy Multicast Transmission

Xiaowei Wang, Meixia Tao, Youyun Xu

Published Jan 31, 2014• 21 citations
Publisher

Abstract

This work considers a multicast network in the presence of an eavesdropper. We investigate a cooperative multicast scheme which allows the users to function as relays. The secure outage behavior of this scheme is studied and the analytical expression of secure outage probability is derived. Numerical results show that the proposed cooperative multicast scheme outperforms the direct multicast without cooperation in terms of secure outage probability.

DOI
10.1109/wcl.2013.122113.130849

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This work considers a multicast network in the presence of an eavesdropper. We investigate a cooperative multicast scheme which allows the users to function as relays. The secure outage behavior of this scheme is studied and the analytical expression of secure outage probability is derived. Numerical results show that the proposed cooperative multicast scheme outperforms the direct multicast without cooperation in terms of secure outage probability.
We consider a confidential communication through Rayleigh fading channel in which a source transmits a common stream of information to the multiple client receivers via multiple relays in the presence of an eavesdropper. We assume that there is no direct path from source to client receivers and eavesdropper, and communication occurs only through the relays. In order to increase the spectral efficiency, we consider a linear equalization, e.g., zero-forcing (ZF) in cooperative spatial multiplexing system. Considering the effect of linear equalization, at first, we derive the exact closed-form expression for the ergodic secrecy multicast capacity. Then, we derive the closed-form expressions for the secure outage probability and the complementary cumulative distribution function (CCDF) of secrecy multicast capacity to analyze the outage performance of proposed model.
This paper investigates the secrecy outage probability of multicast cooperative relay networking in the presence of multi-destination and multi-eavesdropper nodes. The study is carried out in a multicast relay communication scenario whereby multi-eavesdropper nodes attempt to overhear the source message. Most of the previous studies in the field of cooperative communications and relay selection have considered the presence of either a single eavesdropper or a single destination environment. However, in the actual multicast communication scenario, multi-destination and multi-eavesdropper are presented. We therefore consider an optimal relay selection scheme in order to increase secrecy capacity for multi-destinations and to decrease it for eavesdroppers. The performance of the system is analysed using secrecy outage probability in Rayleigh and Rician fading scenarios, and the results are confirmed through Monte Carlo simulations. The proposed model is compared with other cooperative communication scenarios.
This paper investigates the secrecy outage probabilityof multicast cooperative relay networking in the presenceof multi-destination and multi-eavesdropper nodes. The study iscarried out in a multicast relay communication scenario wherebymulti-eavesdropper nodes attempt to overhear the source message.Most of the previous studies in the field of cooperativecommunications and relay selection have considered the presenceof either a single eavesdropper or a single destination environment.However, in the actual multicast communication scenario,multi-destination and multi-eavesdropper are presented.We therefore consider an optimal relay selection scheme inorder to increase secrecy capacity for multi-destinations and todecrease it for eavesdroppers. The performance of the system isanalysed using secrecy outage probability in Rayleigh and Ricianfading scenarios, and the results are confirmed through MonteCarlo simulations. The proposed model is compared with othercooperative communication scenarios .
In this paper, we consider a dual-hop decode-and-forward (DF) relay network which consists of a source, a destination and multiple DF relays in the presence of an eavesdropper, where the source transmits its data to the destination with the help of DF relays while the eavesdropper attempts to tap the relay transmissions. We examine the impact of channel estimation errors on the secrecy performance of source-destination transmissions and propose an optimal relay selection scheme for improving the transmission security against eavesdropping. To be specific, the proposed relay selection is designed by considering the fact that the channel state information (CSI) of any link from the source via DF relays to destination is inaccurate with channel estimation errors. The traditional round-robin relay selection is also considered for comparison purposes. We derive close-form expressions of the secrecy outage probability for both the proposed optimal relay selection scheme and traditional round-robin relay selection schemes. Numerical results demonstrate an adverse effect of the channel estimation errors on the secrecy outage probability of cooperative relay systems. Additionally, it is shown that the proposed optimal relay selection scheme substantially outperforms the traditional round-robin selection approach in terms of the secrecy outage probability.
This Paper presents a comprehensive analysis of secrecy performance in a multicast wireless communication network operating over Nakagami- 0.5 fading channels. The Probability of non-zero secrecy multicast capacity (PNSMC) and the secure outage probability for multicasting (SOPM) are analytically developed under the influence of multiple relays, legitimate users, and eavesdroppers. To ensure enhanced secrecy reliability, an opportunistic relay selection approach is integrated with selection combining (SC) diversity at the destination. Verified the analytical results through extensive Monte Carlo simulations, exhibiting a strong correspondence with theoretical predictions. Numerical evaluations indicate that an increased number of relays and destination antennas notably strengthen secrecy performance, whereas stronger eavesdropper channels deteriorate it. In general, the framework presented provides useful design guidelines for cooperative secure multicast communication systems operating in severe fading environments.
In this paper, we investigate the secrecy performance of multiuser dual-hop relay networks where a base station (BS) communicates with multiple legitimate users via the assistance of a trustful regenerative relay in the presence of multiple eavesdroppers. In particular, the maximal ratio transmission (MRT) scheme is exploited at the BS and a threshold-based multiuser scheduling scheme is employed over the legitimate users, while concerning the imperfect decoding at the regenerative relay. Furthermore, we consider the passive eavesdropper scenario and non-colluding eavesdropping mode. In order to quantify the secrecy performance of the considered system, the new exact closed-form expression for the secrecy outage probability is derived. In addition, conducive and simple high SNR approximation for the secrecy outage probability is also presented, which capacitates further insights into the impact of key system parameters on secrecy performance. Numerical results are provided to verify our theoretical analyses and illustrate the impact of key system parameters on the secrecy outage performance.