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Lecture notes in electrical engineering

Physical Layer Security with Energy Harvesting in Single Hop Wireless Relaying System

Poonam Jindal, Rupali Sinha

Published Jan 1, 2017• 5 citations
Publisher
DOI
10.1007/978-981-10-4154-9_29

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In wireless communication systems, for secure communication between a transmitter and receiver over the communication channel, the physical layer security is widely utilized. The paper presents a dual‐hop wireless full‐duplex relay (FDR) network with a source relay and destination relay between two nodes and listening devices. The relay and source use energy harvesting to gain energy from power beacon. Two cooperative techniques are utilized to investigate the amplify‐forward (AF) and decode‐forward (DF) secrecy capacity in the energy harvesting power splitting system. It is shown that the secrecy performance of an AF relay is better than the secrecy performance of a DF relay in the given form. At 40‐meter distance between the relay and the eavesdropper in an energy harvesting system, the AF relay outperforms the DF relay. The simulation is performed using the Monte‐Carlo method in MATLAB.

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Security is one of the most important issues in wireless communication.Because using wireless channels entails broadcasting data transmissions, malicious nodes can eavesdrop on wireless transmission, which leads to insecure data transmission.Traditional security methods are based on cryptography.Recently, physical-layer security (PLS) has gained much attention as an efficient method of obtaining secure information without using cryptography.PLS protocols employ the physical characteristics of wireless channels such as channel state information (CSI) and the distances between connection links in order to enhance secrecy performances in wireless systems.To enhance secrecy performances, the dual-hop/multi-hop relay protocols can be used efficiently.However, according to my best knowledge, there are few published works considering the impact of hardware impairments on secrecy performances for the wireless relaying networks.Hence, this dissertation examines the diversity-based relay protocols for wireless communication networks in order to improve secrecy performances in presence of hardware imperfections.First, new dual-hop and multi-hop cooperative relaying schemes with various relay selection methods are proposed in order to obtain improved secrecy performance compared with the existing schemes.Second, new joint relay and jammer selection protocols are also considered in order to improve the channel capacity for data links while reducing the channel capacity of eavesdropping links.Finally, this dissertation proposes harvest-to-transmit and harvest-to-jam protocols, where the relay and jammer nodes harvest energy from the radio frequency signal for use in the data transmission and the jamming process, respectively.To evaluate the performance of the proposed protocols over fading channels, this dissertation focuses on deriving the closed-form expressions for secrecy performances.Then, the derived expressions are verified by Monte Carlo simulations, which also present the advantages of the proposed protocols.

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Secrecy Outage Analysis in Energy Harvesting Relay Networks with a Friendly Jammer

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Physical layer security is a suitable replacement or complement to the traditional cryptography method for securing a wireless network. Physical layer security exploits the random characteristics of a wireless channel. Deploying multiple relays and a jammer can secure the system performance, however, extra power is required. RF energy harvesting is a promising solution to a wireless network's energy scarcity problem. RF energy is widely available in the environment due to billions of devices broadcasting it. Therefore, a secure, green system model is proposed with a source, destination, energy harvested relaying nodes, energy harvested jammer, power beacon and an eavesdropper. The theoretical analysis and simulations are provided to evaluate the system performance. The results show that when the number of relays increases, the secrecy outage probability of the considered system decreases. In addition, the system with a jammer outperforms that without a jammer, especially in high SNR scenarios. Finally, the energy harvesting time fraction is an important parameter and needs to be designed carefully in a system.

International Conference on Recent Advances in Signal Processing, Telecommunications & Computing (SigTelCom)•Aug 1, 2020•9 citations
In wireless communication systems, for secure communication between a transmitter and receiver over the communication channel, the physical layer security is widely utilized. The paper presents a dual‐hop wireless full‐duplex relay (FDR) network with a source relay and destination relay between two nodes and listening devices. The relay and source use energy harvesting to gain energy from power beacon. Two cooperative techniques are utilized to investigate the amplify‐forward (AF) and decode‐forward (DF) secrecy capacity in the energy harvesting power splitting system. It is shown that the secrecy performance of an AF relay is better than the secrecy performance of a DF relay in the given form. At 40‐meter distance between the relay and the eavesdropper in an energy harvesting system, the AF relay outperforms the DF relay. The simulation is performed using the Monte‐Carlo method in MATLAB.
Security is one of the most important issues in wireless communication.Because using wireless channels entails broadcasting data transmissions, malicious nodes can eavesdrop on wireless transmission, which leads to insecure data transmission.Traditional security methods are based on cryptography.Recently, physical-layer security (PLS) has gained much attention as an efficient method of obtaining secure information without using cryptography.PLS protocols employ the physical characteristics of wireless channels such as channel state information (CSI) and the distances between connection links in order to enhance secrecy performances in wireless systems.To enhance secrecy performances, the dual-hop/multi-hop relay protocols can be used efficiently.However, according to my best knowledge, there are few published works considering the impact of hardware impairments on secrecy performances for the wireless relaying networks.Hence, this dissertation examines the diversity-based relay protocols for wireless communication networks in order to improve secrecy performances in presence of hardware imperfections.First, new dual-hop and multi-hop cooperative relaying schemes with various relay selection methods are proposed in order to obtain improved secrecy performance compared with the existing schemes.Second, new joint relay and jammer selection protocols are also considered in order to improve the channel capacity for data links while reducing the channel capacity of eavesdropping links.Finally, this dissertation proposes harvest-to-transmit and harvest-to-jam protocols, where the relay and jammer nodes harvest energy from the radio frequency signal for use in the data transmission and the jamming process, respectively.To evaluate the performance of the proposed protocols over fading channels, this dissertation focuses on deriving the closed-form expressions for secrecy performances.Then, the derived expressions are verified by Monte Carlo simulations, which also present the advantages of the proposed protocols.
Physical layer security is a suitable replacement or complement to the traditional cryptography method for securing a wireless network. Physical layer security exploits the random characteristics of a wireless channel. Deploying multiple relays and a jammer can secure the system performance, however, extra power is required. RF energy harvesting is a promising solution to a wireless network's energy scarcity problem. RF energy is widely available in the environment due to billions of devices broadcasting it. Therefore, a secure, green system model is proposed with a source, destination, energy harvested relaying nodes, energy harvested jammer, power beacon and an eavesdropper. The theoretical analysis and simulations are provided to evaluate the system performance. The results show that when the number of relays increases, the secrecy outage probability of the considered system decreases. In addition, the system with a jammer outperforms that without a jammer, especially in high SNR scenarios. Finally, the energy harvesting time fraction is an important parameter and needs to be designed carefully in a system.