Impact of Outdated CSI on the Secrecy Performance of Wireless-Powered Untrusted Relay Networks

Lee, Kisong; Lim, Jin-Taek; Choi, Hyun-Ho

doi:10.1109/tifs.2019.2940906

Cited by 21 publications

(10 citation statements)

References 37 publications

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“…To utilize the DC programming and solve the non-convex objective function in (23), the objective function in ( 23) can be rewritten as…”

Section: B DC Programming For Sub-optimal Transmission Power With the Fixed σ Mmentioning

confidence: 99%

“…Then the EH jammers and relay nodes are integrated into the two-way relay system [20], [21]. To simplify the system model and reduce additional overhead, destination-based jamming (DBJ) was proposed to guarantee security transmission in wireless-powered relay networks [23]- [27]. In [23], [24], the resource division factors were optimized to improve the secrecy rate.…”

Section: Introductionmentioning

confidence: 99%

“…To simplify the system model and reduce additional overhead, destination-based jamming (DBJ) was proposed to guarantee security transmission in wireless-powered relay networks [23]- [27]. In [23], [24], the resource division factors were optimized to improve the secrecy rate. And the outage performance was analyzed in [25].…”

Section: Introductionmentioning

confidence: 99%

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Secrecy Transmission for Self-Energy Recycling Untrusted Relay Networks With Imperfect Channel State Information

Song

Xie

et al. 2019

IEEE Access

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For the self-energy recycling (SER) untrusted relay network, a two-phase destination-based jamming (DBJ) protocol is proposed, in which the destination transmits the jamming signal to reduce the received SNR of the untrusted relay node in the first phase and the relay node operated in full-duplex (FD) mode for simultaneous energy transfer and information relaying in the second phase. In addition, the loopback interference (LI) generated by FD relay node can be reused as part of energy. To satisfy some practical application scenarios, we consider the imperfect channel estimation error at the destination. Considering the total power constraint and the quality of service (QoS) requirement at the destination, the secrecy rate maximization problem is formulated by optimizing the transmission power of source and destination. However, the formulated problem is non-convex and difficult to solve directly. To cope with this difficulty, an iterative power allocation algorithm is proposed. The key idea of the proposed algorithm first integrates the non-convex constraint into the objective function by the exact penalty method. Then the difference of convex functions (DC) programming can be utilized to convert the non-convex objective function into the approximate convex function and the sub-optimal transmission power of source and destination can be obtained by the traditional convex programming. Simulation results show the superiority security performance of the proposed scheme with the traditional schemes.INDEX TERMS Physical layer security, self-energy recycling, power allocation, imperfect channel estimation error, secrecy rate.

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“…To utilize the DC programming and solve the non-convex objective function in (23), the objective function in ( 23) can be rewritten as…”

Section: B DC Programming For Sub-optimal Transmission Power With the Fixed σ Mmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Secrecy Transmission for Self-Energy Recycling Untrusted Relay Networks With Imperfect Channel State Information

Song

Xie

et al. 2019

IEEE Access

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“…In the presence of outdated CSI, [13] investigated the on-off scheme to help perform secure transmission and presented the design of wiretap coding parameters. Moreover, based on the study of [10], the optimal control of the artificial noise power level under outdated CSI were derived to maximize the secrecy performance of wireless powered untrusted relay networks in [14], [15].…”

Section: Introductionmentioning

confidence: 99%

Impact of Outdated CSI on the Secure Communication in Untrusted In-Band Full-Duplex Relay Networks

2022

Self Cite

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To provide reliable connectivity in recent and future wireless communication systems, it is necessary to deploy several relay nodes. Further, a full-duplex (FD) technique has been in the spotlight since it can significantly improve spectral efficiency, and thus recent studies in relaying networks have considered FD relays. In relaying networks, confidentiality between the source and destination nodes from the relay node should be carefully kept, especially, when the relay node is not fully trusted, so-called untrusted relay node. To this end, in this paper, we consider physical-layer security taking into account an untrusted FD relay node. We investigate a secure relaying protocol against the untrusted relay node where the destination generates artificial noise to prevent the untrusted relay from decoding the source information. We derive the analytical expression of the lower bound of the ergodic secrecy rate ( R). We find two main factors affecting the secrecy performance: residual self-interference (RSI) at the FD-available nodes (i.e., relay and destination), and outdated channel state information (CSI) at the destination. Thereafter, we evaluate their effects on R and suggest the algorithm for finding the sub-optimal artificial noise power level at the destination for maximizing R. Through simulations, we have verified our mathematical derivation and have shown that our secure relaying protocol can achieve near-optimal secrecy performance. Numerical results imply that the artificial noise power level should be carefully considered when the channel is severely outdated and RSI is irresistible.INDEX TERMS Physical-layer security, untrusted relay, full-duplex, outdated channel state information, artificial noise.

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“…To enlarge the perfect secrecy rate, current techniques focus on improving the quality of authenticated links and/or to degrade potential wiretap links. In particular, the works of [2] and [3] employed jamming signal to prevent untrusted nodes of overhearing the confidential information. The work of [4] combined both the jamming signal and a relay-selection method to rise the security advantage from both user's and eavesdropper's sides where a relay that assists the communication at the highest perfect secrecy rate was selected to forward the confidential information.…”

Section: Introductionmentioning

confidence: 99%

Secrecy Performance Analysis and Optimization of Intelligent Reflecting Surface-Aided Indoor Wireless Communications

Tuan

Hong

2020

IEEE Access

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This paper studies the secrecy performance of an intelligent reflecting surface (IRS)-aided indoor wireless communication where the IRS is capable of adjusting the direction and phase shift of reflected signal on its surface and assists a source to communicate with an authenticated user in the presence of several unauthenticated users, which can be potential eavesdroppers. The goal of this paper is to design a tile-allocation-and-phase-shift-adjustment (TAaPSA) strategy for the IRS to optimize the average secrecy rate (ASR); moreover, the respective secrecy outage probability (SOP) for this TAaPSA is evaluated. To achieve this goal, the ray model and the Rice distribution are adopted to describe the propagation of the IRS's reflected signals and the fading process, respectively. Closed-form analytical expressions for the ASR and the SOP are derived. Using these analytical results, a genetic algorithm (GA) is utilized to find an optimal TAaPSA strategy for the IRS. The accuracy of the analytical results and the improvement in ASR using GA-based TAaPSA strategy are verified by simulation results.

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Impact of Outdated CSI on the Secrecy Performance of Wireless-Powered Untrusted Relay Networks

Cited by 21 publications

References 37 publications

Secrecy Transmission for Self-Energy Recycling Untrusted Relay Networks With Imperfect Channel State Information

Secrecy Transmission for Self-Energy Recycling Untrusted Relay Networks With Imperfect Channel State Information

Impact of Outdated CSI on the Secure Communication in Untrusted In-Band Full-Duplex Relay Networks

Secrecy Performance Analysis and Optimization of Intelligent Reflecting Surface-Aided Indoor Wireless Communications

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