Furqan Jameel

Secrecy Outage for Wireless Sensor Networks

This letter addresses physical layer security (PLS) for a wireless sensor network, in which multiple sensor nodes communicate with a single sink in the presence of an eavesdropper. Under the assumption of sink using outdated channel state information (CSI) of the eavesdropper link, the outage probability of achievable secrecy rate under Weibull fading is investigated and its analytical expressions are derived. Specifically, we consider sensor scheduling to enhance PLS, thereby, we quantify the degradation in outage probability due to outdated CSI under the best-node scheduling scheme and compare it with conventional round-robin scheduling. Finally, we analyze secrecy outage probability conditional on successful transmission and provide practical insights into the effect of outdated CSI of the eavesdropper. The derived theoretical results are validated through simulations.

Performance analysis of VANETs under Rayleigh, Rician, Nakagami-m and Weibull fading

Vehicular Ad-hoc Networks (VANETs) are considered as one of the promising technologies for reduction of accidents and provisioning of infotainment services on the road. Due to high mobility of vehicles, wireless channel response rapidly changes from time to time which results into random fading. Therefore, this paper provides in depth analysis of performance of VANETs under different fading channels. To be specific, we adopt the cluster based approach to analytically model VANETs. Closed-form expressions of packet loss probability for different fading (i.e. Rayleigh, Rician, Nakagami-m and Weibull channel) models have been provided considering both MAC and Physical Layer characteristics. The derived expressions also encompass the effect of decoding failure and packet collision based on signal to noise ratio (SNR) and back-off timer, respectively. Our results characterizes the impact of channel conditions, vehicle speed, and contention window on the performance of the cluster based VANETs. Extensive simulations are performed to verify our findings.

Analysis of interference in body area networks over generalized fading

Wireless Body Area Networks (BANs) have become one of the most anticipated technologies of the current century due to their application oriented nature. The main objective of this paper is to quantify and analyze the impact of co-channel interference on BANs under generalized fading. Specifically, this paper adopts the cluster based approach to analytically model and derive a closed-form expression for packet error probability under generalized fading channel. Interference from nearby cluster using the same frequency band, is considered while deriving the expression. A mathematical expression for antenna selection scheme is also obtained to enhance the performance of the desired cluster. Extensive simulations are performed to validate our findings which clearly prove the practical significance of our analytical model.

Analysis of Co-Channel Interference in VANETs under Nakagami-m Fading

Vehicular networks have become one of the most anticipated technologies of the current century due to their application oriented nature. This paper adopts the cluster based approach to analytically model the implications of interference in Vehicular Ad-hoc Networks (VANETs). To be specific, we derive a closed form expression for packet error probability for co-channel interference under Nakagami-m fading channel. Impact of Nakagami-m shape factor on interference is also characterized in detail. We then derive an expression for antenna selection scheme and obtain noteworthy enhancement in performance of cluster. Extensive simulations are performed to validate our findings which clearly prove the practical significance of our analytical model.

On the Secrecy Performance of SWIPT Receiver Architectures with Multiple Eavesdroppers

Physical layer security (PLS) has been shown to hold promise as a new paradigm for securing wireless links. In contrast with the conventional cryptographic techniques, PLS methods exploit the random fading in wireless channels to provide link security. As the channel dynamics prevent a constant rate of secure communications between the legitimate terminals, the outage probability of the achievable secrecy rate is used as a measure of the secrecy performance. This work investigates the secrecy outage probability of a simultaneous wireless information and power transfer (SWIPT) system, which operates in the presence of multiple eavesdroppers that also have the energy harvesting capability. The loss in secrecy performance due to eavesdropper collusion, i.e., information sharing between the eavesdroppers to decode the secret message, is also analyzed. We derive closed-form expressions for the secrecy outage probability for Nakagami-

High SNR analysis of inter-body interference in Body Area Networks

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Network security challenges in smart grid

fading on the links and imperfect channel estimation at the receivers. Our analysis considers different combinations of the separated and the integrated SWIPT receiver architectures at the receivers. Numerical results are provided to validate our analysis.

Optimal time switching and power splitting in SWIPT

Wireless Body Area Networks (BANs) have drawn significant attention of research community all over the world due to their applications in healthcare. This paper adopts the cluster based approach to analytically model the implications of inter-body interference in BANs. To be specific, we derive exact closed-form expression for outage probability for co-channel interference under Rayleigh and Rician fading. We consider two cases, where in first case channel between sensors and cluster head is Rice distributed and channel between main and interfering cluster head is Rayleigh distributed. In second case, channel between sensors and cluster head is Rayleigh distributed and channel between main and interfering cluster head is Rice distributed. We also evaluate the significance of Rician-K factor for both cases. Extensive simulations are performed to validate our findings which clearly show the effect of inter-body interference on the performance of BANs.

Secrecy outage of SWIPT in the presence of cooperating eavesdroppers

Smart grids are considered as one of the most revolutionary technologies in the field of power and communication. However, security management of such a big infrastructure is a key challenge for the research community of the world. In this context, this paper provides the major security goals of smart grid systems along with classification of different vulnerabilities. Additionally, we also present remedial measures to prevent these security threats. In the end, we provide conclusions and future works to finalize the analysis of security issues in smart grid.

Impact of co-channel interference on the performance of VANETs under α-μ fading

Simultaneous wireless information and power transfer (SWIPT)hasdrawnsignificant researchinterest in recent years. This paper investigates the data outage and energy shortage probability of SWIPT system for a generalized On-off power splitting architecture. All links are subject to Weibullfading. We also derive a closed-form expression for optimal value of time switching parameter and power splitting factor to balance the rate-energy trade-off at the receiver. Numerical and simulation results are provided to validate the derived results.