Physical Layer Security for V2I Communications: Reflecting Surfaces Vs. Relaying

Mensi, Neji; Rawat, Danda B.; Balti, Elyes

doi:10.48550/arxiv.2010.07216

Cited by 4 publications

(5 citation statements)

References 12 publications

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“…Applying identity [49, 07.34.21.0012.01] in (7), we get (5). The derived PDF in (5) does not have any constraint on the parameters of dGG as present in the Meijer's-G representation [37].…”

Section: Statistical Results For Cascaded Channelsmentioning

confidence: 99%

RIS-Assisted Multihop FSO/RF Hybrid System for Vehicular Communications over Generalized Fading

Chapala¹,

Zafaruddin²

2021

Preprint

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Reconfigurable intelligent surface (RIS) is a promising technology to avoid signal blockage by creating line-ofsight (LOS) connectivity for free-space optical (FSO) and radio frequency (RF) wireless systems. There is limited research on the use of multiple RIS between a source and destination for wireless communications. This paper analyzes the performance of a RISassisted multi-hop transmission for vehicular communications by employing multiple RIS to enable LOS communication and reliable connectivity for a hybrid FSO and RF system. We develop an analytical framework to derive statistical results of the signalto-noise ratio (SNR) of a multi-RIS communication system over general fading models. We use decode-and-forward (DF) and fixed-gain (FG) relaying protocols to mix multi-RIS transmissions over RF and FSO technologies, and derive probability density and distribution functions for both the relaying schemes by considering independent and non-identical double generalized gamma (dGG) distribution models for vehicular RF transmissions and atmospheric turbulence for FSO system combined with zeroboresight pointing errors. We analyze the performance of a moving vehicle connected to one of the RIS modules by deriving exact analytical expressions of the outage probability, average bit-error rate (BER), and ergodic capacity in terms of Fox's H-function. We present asymptotic analysis and diversity order of the outage probability in the high SNR regime to provide a better insight into the system performance. We use computer simulations to demonstrate the effect of multiple RIS modules, fading parameters, and pointing errors on the RIS-aided multihop transmissions for the considered vehicular communication system.

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“…Applying identity [49, 07.34.21.0012.01] in (7), we get (5). The derived PDF in (5) does not have any constraint on the parameters of dGG as present in the Meijer's-G representation [37].…”

Section: Statistical Results For Cascaded Channelsmentioning

confidence: 99%

RIS-Assisted Multihop FSO/RF Hybrid System for Vehicular Communications over Generalized Fading

Chapala¹,

Zafaruddin²

2021

Preprint

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“…Furthermore, PLS for multiple-input multipleoutput (MIMO) systems has been analyzed considering Nakagami-𝑚 fading under optimal, sub-optimal, and transmit antenna selection scheme [17]. Several studies look into two vehicular network system models: one with vehicle-to-vehicle communication and a RIS based access point as the source, and the other as a vehicular adhoc network (VANET) with a RIS-based relay mounted on a building [18][19][20]. Due to their ease of deployment and variable configuration, RIS-based technologies can be targeted for mobile nodes in vehicle networks.…”

Section: Related Workmentioning

confidence: 99%

“…Although several prior research [3,4,[18][19][20] assumed quasi static node positions for simplicity of analysis, the mobility effect of nodes has been proven to impair the performance of vehicular nodes. However, it has recently been demonstrated that adopting a real-time tuneable RIS can successfully mitigate rapid changes in received signal strength caused by the doppler effect.…”

Section: Motivations and Noveltymentioning

confidence: 99%

Restricting passive attacks in 6G vehicular networks: a physical layer security perspective

Kavaiya

Patel

2022

Wireless Netw

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The utilization of current wireless technologies in intelligent transportation systems confirms the massive connectivity with sufficient data rate. With the increasing amenities, the possibilities of passive attacks are also increases that may compromise the user's transmission. To handle such scenarios, physical layer security can be employed to secure the transmission. This paper provides insights into the performance of outage probability (OP), and secrecy outage probability (SOP) for 6G enabled vehicular networks under the influence of passive eavesdroppers. As a component of 6G infrastructure, the work considers the vehicular to infrastructure scenario with re-configurable intelligent surfaces (RIS) instead of power-hungry roadside units. Each vehicle and passive eavesdropper are equipped with dual antennas. In that particular direction, at first, this work derive the analytical expressions of received signal-tonoise ratio (SNR) under impact of mobility for 6G vehicular networks. By utilising the expressions of SNR, we derive the closed-form expressions of first order secrecy metrics for example, outage probability and secrecy outage probability. The expressions of SNR have been derived for two initial locations (near and far from the legitimate transmitter) of legitimate receiver. The derived expressions are helpful to design and simulate the secrecy systems for vehicular networks because of their robustness towards road parameters, and signal parameters. At last we conclude that it is advantageous to have the RIS element instead of regular access point to save the extra transmission power as no major fluctuations have been noticed in the performance of secrecy metrics under the influence of RIS.

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“…In addition, some other works also leverage RIS for security purposes, for example [19] suggested that RIS can help in alleviating security breaches related to eavesdropping. In [20], the authors studied the security issues related to eavesdropping attacks under different circumstances including active and passive relays (RIS).…”

Section: Related Workmentioning

confidence: 99%

“…In line with our proof and discussion above, we carry out three experiments to see the achievable minimum average bit rate for multi-user scenario. We set x R = 0, x I = [10,20,30,40,50]. Vehicles are generated by SUMO.…”

Section: A Ris Placementmentioning

confidence: 99%

Reconfigurable Intelligent Surface Enabled Vehicular Communication: Joint User Scheduling and Passive Beamforming

Al-Hilo¹,

Samir²,

Elhattab³

et al. 2021

Preprint

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Given its ability to control and manipulate wireless environments, reconfigurable intelligent surface (RIS), also known as intelligent reflecting surface (IRS), has emerged as a key enabler technology for the six-generation (6G) cellular networks. In the meantime, vehicular environment radio propagation is negatively influenced by a large set of objects that cause transmission distortion such as high buildings. Therefore, this work is devoted to explore the area of RIS technology integration with vehicular communications while considering the dynamic nature of such communication environment. Specifically, we provide a system model where RoadSide Unit (RSU) leverages RIS to provide indirect wireless transmissions to disconnected areas, known as dark zones. Dark zones are spots within RSU coverage where the communication links are blocked due to the existence of blockages. In details, a discrete RIS is utilized to provide communication links between the RSU and the vehicles passing through out-of-service zones. Therefore, the joint problem of RSU resource scheduling and RIS passive beamforming or phase-shift matrix is formulated as an optimization problem with the objective of maximizing the minimum average bit rate. The formulated problem is mixed integer non-convex program which is difficult to be solved and does not account for the uncertain dynamic environment in vehicular networks. Thereby, we resort to alternative methods based on Deep Reinforcement Learning to determine RSU wireless scheduling and Block Coordinate Descent (BCD) to solve for the phase-shift matrix, i.e., passive beamforming, of the RIS. The Markov Decision Process (MDP) is defined and the complexity of the solution approach is discussed. Our numerical results demonstrate the superiority of our proposed approach over baseline techniques.

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Physical Layer Security for V2I Communications: Reflecting Surfaces Vs. Relaying

Cited by 4 publications

References 12 publications

RIS-Assisted Multihop FSO/RF Hybrid System for Vehicular Communications over Generalized Fading

RIS-Assisted Multihop FSO/RF Hybrid System for Vehicular Communications over Generalized Fading

Restricting passive attacks in 6G vehicular networks: a physical layer security perspective

Reconfigurable Intelligent Surface Enabled Vehicular Communication: Joint User Scheduling and Passive Beamforming

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