Secrecy Outage of Dual-Hop Regenerative Multi-Relay System With Relay Selection

Kundu, Chinmoy; Ghose, Sarbani; Bose, Ranjan

doi:10.1109/twc.2015.2423290

Cited by 66 publications

(159 citation statements)

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“…It is highlighting that this configuration has numerous practical applications, for instance, in wireless sensor networks (WSN) where the multiantenna nodes convey information via a mobile relay that is restricted to a single antenna due to cost and size limitations, or in device-to-device (D2D) communications scenarios where the relay assists two multi-antenna devices to exchange messages [36]- [42]. Moreover, we follow the similar scenario in [15], [16], [20], [29]- [33], where both of the direct links A → B and A → E are assumed to be nonexistent, due to the direct links may be blocked by an obstruction or suffer from severe shadow fading. By this way, the transmission in the first hop cannot be overheard by Eves.…”

Section: Notationmentioning

confidence: 99%

“…Mathematically, the secrecy outage probability is formulated as P out (R s ) = Pr (C s < R s ). Following the similar procedures developed in [20], the secrecy outage probability is re-expressed as…”

Section: B Scenario I: Eavesdropper's Csi Is Unavailable At the Relaymentioning

confidence: 99%

“…This hypothesis of decoding without errors at the relays is not applicable throughout the SNR range. It is highlighting that the quality of the first hop also has a significant impact on the PLS of wireless relaying networks [19], [20]. In [19], the PLS of dual-hop relaying networks employing DF protocol was investigated, where only a set of relays are assumed to be able to successfully decode the message.…”

mentioning

confidence: 99%

“…In [19], the PLS of dual-hop relaying networks employing DF protocol was investigated, where only a set of relays are assumed to be able to successfully decode the message. Specifically, in a very recent work [20], the secrecy outage performance of dual-hop regenerative multirelay systems with relay selection was investigated. In this work, the authors assumed that the relay may suffer from a wrong decision, and thus the rate is limited by the minimum quality of the dual-hop links.…”

mentioning

confidence: 99%

“…Different from the high SNR assumption [15], [16] or perfect decoding [17], [18] at the relay, we follow a similar consideration as in [20] and take into account the impact of the quality of the first hop on the secrecy rate. Therefore, the secrecy capacity of dual-hop DF relay system C s is given by [20] …”

mentioning

confidence: 99%

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Secure Multiuser Scheduling in Downlink Dual-Hop Regenerative Relay Networks Over Nakagami- $m$ Fading Channels

Yang

Guo

Huang

et al. 2016

IEEE Trans. Wireless Commun.

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Abstract-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. Particularly, 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. To evaluate the secrecy performance of the considered system, two practical situations are addressed based on the availability of eavesdropper's channel state information (CSI), i.e., Scenario I, where the eavesdropper's CSI is not available at the relay, and Scenario II, where the eavesdropper's CSI is available at the relay. For both scenarios, we further consider two eavesdropping modes, i.e., colluding eavesdropping and non-colluding eavesdropping. For Scenario I, new exact and asymptotic closed-form expressions of the secrecy outage probability (SOP) are derived. For Scenario II, we derive new exact and asymptotic closedform expressions of ergodic secrecy rate (ESR). The asymptotic SOPs demonstrate that the secrecy diversity order is independent of the number of legitimate users NB and eavesdroppers NE, the number of antennas equipped at eavesdroppers AE as well as fading factor of the wiretap channel mE. Furthermore, we also determine the secrecy multiplexing gain and the power cost to explicitly quantify the impact of the legitimate channel and wiretap channel on ergodic secrecy rate. Our findings demonstrate that increasing the switching threshold, the number of antennas at the BS, and the number of legitimate users have a positive impact on secrecy performance.Index Terms-Physical layer security, cooperative relay, multiuser diversity, threshold-based scheduling scheme, secrecy outage probability, ergodic secrecy rate.

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Section: Notationmentioning

confidence: 99%

Section: B Scenario I: Eavesdropper's Csi Is Unavailable At the Relaymentioning

confidence: 99%

mentioning

confidence: 99%

mentioning

confidence: 99%

mentioning

confidence: 99%

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Secure Multiuser Scheduling in Downlink Dual-Hop Regenerative Relay Networks Over Nakagami- $m$ Fading Channels

Yang

Guo

Huang

et al. 2016

IEEE Trans. Wireless Commun.

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A novel relay selection algorithm using ant colony optimization with artificial noise for secrecy enhancement in cooperative networks

Jibukumar

Sabu

2018

Int J Communication

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Cooperative communication is one of the fastest growing research areas of today. It can efficiently mitigate the effect of shadowing and fading with the help of relays and proper relay selection technique. In this paper, a novel relay selection scheme combined with artificial noise (AN) is devised to enhance the secrecy of cooperative networks with amplify-and-forward scheme, over Rayleigh fading channels in the presence of a passive eavesdropper. The probability of path selection of ant colony optimization algorithm is used for selecting the best relay with high end-to-end signal-to-noise ratio. The probability of choosing a path depends on the significance of channel gain (G) and fading coefficients (h). The proposed algorithm finds the best relay in the following wireless scenarios: when (i) both channel gain and fading coefficients are significant; (ii) only fading coefficients are significant; and (iii) only channel gain is significant. Because the direct links between source and destination and source and eavesdropper are considered, AN along with the information is sent by both the source and the selected relay. The performance is evaluated based on secrecy rate (R s ); for the relays randomly placed between the source and destination and for different eavesdropper's location. The results show that the proposed relay selection scheme achieves better secrecy for different wireless scenarios compared with traditional schemes. With the help of AN, the secrecy rate can be made positive even when the eavesdropper lies near to source.

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Secure AF relaying with efficient partial relay selection scheme

Chu

Liu

Nguyen

2019

Int J Communication

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Summary This paper evaluates the secrecy performance for the amplify‐and‐forward (AF) protocol with partial relay selection (PRS) schemes in the scenario of multiple independent but not necessarily identically distributed eavesdroppers. The secrecy performances of the first‐hop and second‐hop PRS schemes are revisited. Given the secrecy data rate, an efficient PRS scheme is presented, which selects the relay based on the instantaneous channel state information (CSI) of either the first or second hop according to the statistical CSI of two hops. The proposed PRS scheme provides the trade‐off between the two‐hop and one‐hop PRS criteria. Results show that the secrecy outage probability (SOP) performance of the proposed scheme is close to that of the conventional opportunistic relaying in the medium main‐to‐eavesdropper ratio (MER) regions. As for the intercept probability, the second‐hop scheme achieves the highest diversity order among PRS schemes and its performance depends on the overall eavesdroppers' behavior not on individual effects of the specific relay. The proposed criterion also outperforms the first‐hop PRS scheme. Simulation results finally substantiate the accuracy of the theoretical analysis.

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Secrecy Outage of Dual-Hop Regenerative Multi-Relay System With Relay Selection

Cited by 66 publications

References 43 publications

Secure Multiuser Scheduling in Downlink Dual-Hop Regenerative Relay Networks Over Nakagami- $m$ Fading Channels

Secure Multiuser Scheduling in Downlink Dual-Hop Regenerative Relay Networks Over Nakagami- $m$ Fading Channels

A novel relay selection algorithm using ant colony optimization with artificial noise for secrecy enhancement in cooperative networks

Secure AF relaying with efficient partial relay selection scheme

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