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International Conference on Electrical Information and Communication Technology (EICT)

Secrecy Capacity of Power Beacon Assisted Short Packet Wireless Networks in the Presence of Multiple Eavesdroppers

Abdullah Al Noman, Md. Zahurul I. Sarkar, Abid Hasan

Published Dec 18, 2025• 0 citations
Publisher

Abstract

Power Beacon (PB)-assisted short packet wireless networks refer to systems where energy limited transmitters first harvest wireless power from a dedicated PB before transmitting short confidential data packets under strict latency constraints. In this paper, we explore the secrecy performance of such networks in the presence of multiple eavesdroppers. Specifically, we develop a novel closed form mathematical expression for the ergodic secrecy capacity (ESC) over Nakagami-m fading channels, which captures the joint effect of wireless energy transfer and fading dynamics. The accuracy of the analytical findings is further validated through Monte-Carlo simulations, showing excellent agreement with the theoretical results. Our results demonstrate that optimizing the fading parameters and channel configurations significantly enhances secrecy capacity, particularly at high transmit signal-to-noise ratio (SNR), while also revealing the existence of an optimal energy harvesting length for secure transmission. This study not only establishes a solid theoretical foundation for secrecy in PB-assisted short packet systems but also provides valuable guidelines for designing secure, ultra reliable, and energy efficient Internet of Things (IoT) and wireless networks.

DOI
10.1109/eict68394.2025.11355560

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Power Beacon (PB)-assisted short packet wireless networks refer to systems where energy limited transmitters first harvest wireless power from a dedicated PB before transmitting short confidential data packets under strict latency constraints. In this paper, we explore the secrecy performance of such networks in the presence of multiple eavesdroppers. Specifically, we develop a novel closed form mathematical expression for the ergodic secrecy capacity (ESC) over Nakagami-m fading channels, which captures the joint effect of wireless energy transfer and fading dynamics. The accuracy of the analytical findings is further validated through Monte-Carlo simulations, showing excellent agreement with the theoretical results. Our results demonstrate that optimizing the fading parameters and channel configurations significantly enhances secrecy capacity, particularly at high transmit signal-to-noise ratio (SNR), while also revealing the existence of an optimal energy harvesting length for secure transmission. This study not only establishes a solid theoretical foundation for secrecy in PB-assisted short packet systems but also provides valuable guidelines for designing secure, ultra reliable, and energy efficient Internet of Things (IoT) and wireless networks.
This paper analyzes the secure outage performance of a power beacon (PB)-assisted wireless network employing short packet communication. We consider a system where an EH transmitter communicates with a legitimate receiver under the threat of multiple eavesdroppers. We derive closed-form expressions for key secrecy metrics: the probability of nonzero secrecy capacity (PNSC), intercept probability, and secure outage probability (SOP) over Nakagami-mmmfading channels. Our analysis delineates the joint impact of the transmit signal-to-noise ratio (SNR), fading severity, channel parameters, the number of eavesdroppers, and additionally demonstrates how energy conversion efficiency of the harvesting circuit influences secrecy behavior in practice. The analytical findings are further validated through Monte-Carlo simulations, which confirm the accuracy of the derived expressions. The findings demonstrate that strategic system design, particularly strengthening the main channel in a proper way, improving harvesting duration, and ensuring efficient energy conversion, can effectively mitigate eavesdropping risks and ensure confidentiality. This work provides critical aspects for securing future energy constrained Internet of Things (IoT) networks where short packets and robust data privacy are essential.
Simultaneous wireless information and power transfer (SWIPT) has recently gathered much research interest from both academia and industry as a key enabler of energy harvesting Internet-of-things (IoT) networks. Due to a number of growing use cases of such networks, it is important to study their performance limits from the perspective of physical layer security (PLS). With this intent, this work aims to provide a novel analysis of the ergodic secrecy capacity of a SWIPT system is provided for Rician and Nakagami- m faded communication links. For a realistic evaluation of the system, the imperfections of channel estimations for different receiver designs of the SWIPT-based IoT systems have been taken into account. Subsequently, the closed-form expressions of the ergodic secrecy capacities for the considered scenario are provided and, then, validated through extensive simulations. The results indicate that an error ceiling appears due to imperfect channel estimation at high values of signal-to-noise ratio (SNR). More importantly, the secrecy capacity under different channel conditions stops increasing beyond a certain limit, despite an increase of the main link SNR. The in-depth analysis of secrecy-energy trade-off has also been performed and a comparison has been provided for imperfect and perfect channel estimation cases. As part of the continuous evolution of IoT networks, the results provided in this work can help in identifying the secrecy limits of IoT networks in the presence of multiple eavesdroppers.
Nowadays, physical layer secrecy has become the new approach to enhance information security of wireless networks and have attracted the attention of lot of researchers in the world. This paper investigates the physical layer secrecy performance of radio frequency energy harvesting (RF-EH) networks over Rayleigh fading channels. The considered RF-EH system consists of multiple power transfer stations, one source and multiple destinations in the presence of multiple passive eavesdroppers. The best power transfer station and the best received signal at destination is selected among multiple power transfer stations and among multiple destinations respectively. By using statistical characteristics of the signal-to-noise ratio (SNR), the exact closed-form expressions of existence probability of secrecy capacity and secrecy outage probability are derived. Finally, simulation results confirm an agreement between our analysis and equivalent Monte-Carlo simulations.
This paper investigates the physical-layer secure performance of a multi-power beacon-empowered wirelessly powered communication system in the surveillance of an external eavesdropper. Specifically, a limited-energy source harvests energy from multiple dedicated power beacons in the first time slot and reuses it to perform data transmission in the second time slot. However, its communication with the destination is wiretapped by a potentially idle untrusted user. Thus, to evaluate the secure performance of the considered system, we have derived closed-form expressions for the secrecy outage probability (SOP) metric in terms of both exact and asymptotic aspects. Through these formulas, we then provide a series of numerical discussions on how to configure the number setting of the power beacon, the energy harvesting parameters as well as scheduling time to improve the SOP performance, where the Monte-Carlo simulation method is used to verify the developed mathematical framework.
In this paper, we present a comprehensive secrecy performance analysis of wireless powered communication networks with multiple eavesdroppers, where an energy-limited information source with multiple antennas harvests the radio frequency energy from a dedicated power beacon (PB) before transmission. To exploit the benefits of multiple antennas at source, two popular multi-antenna transmission schemes, i.e., maximal ratio transmission and transmit antenna selection, are investigated for two intercepting ways at Eves, i.e., non-colluding and colluding scenarios, respectively. Specifically, adopting the time-switching protocol at PB, we derive exact closed-form expressions of the secrecy outage probability and the average secrecy rate for both two transmission schemes taking into account the outdated channel state information. Furthermore, in order to deeply extract insights on the system design, we further present tractable asymptotic secrecy outage probability and ergodic secrecy capacity at high signal-to-noise ratio regimes, which easily enable us to obtain the secrecy diversity order and coding gain of two transmission schemes, respectively. From our analysis, several important concluding remarks are obtained as follows: 1) full secrecy diversity order can be achieved by both two transmission schemes with no feedback delay, however, it reduces to one in the presence of feedback delay; 2) as the number of eavesdroppers increases, the secrecy performance gap between non-colluding and colluding scenarios becomes large; and 3) maximal ratio transmission (MRT) scheme always outperforms transmit antenna selection (TAS) scheme with no feedback delay. However, TAS scheme achieves a similar performance as MRT scheme or even better in moderate and even serious feedback delay conditions.
The paper focuses on investigating secure transmission in wireless powered communication networks (WPCN) that involve multiple energy-constrained relays and one energy-constrained source.The energy is harvested from a power beacon (PB) while operating in the presence of a passive eavesdropper.The study primarily aims to achieve energy-efficient secure communications by examining the impact of channel estimation on the secrecy performance of WPCN under both perfect and imperfect CSI scenarios.To obtain practical insights on improving security and energy efficiency, we propose closed-form expressions for secrecy outage probability (SOP) under the linear energy harvesting (LEH) model of WPCN.Furthermore, we suggest a search method to optimize the secure energy efficiency (SEE) with limited power from PB.The research emphasizes the significance of channel estimation in maintaining the desired performance levels in WPCN in real-world applications.The theoretical results are validated through simulations to ensure their accuracy and reliability.