Terahertz Communications for Massive Connectivity and Security in 6G and Beyond Era

Yang, Nan; Shafie, Akram

doi:10.1109/mcom.001.2200421

Cited by 16 publications

(10 citation statements)

References 16 publications

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“…T ERAHERTZ (THz) band, spanning from 0.1 THz to 10 THz, offers gigahertz-level bandwidth to support massive connectivity [1], ultimate wireless virtual reality (VR) [2] and other huge-capacity demanded applications in envisioned sixth-generation (6G) communication [3]. Despite its bandwidth potential, THz communications still face severe path loss challenges due to its high-frequency loss and atmospheric absorption in air [4].…”

Section: Introductionmentioning

confidence: 99%

Hybrid Channel Tracking for THz Massive MIMO Communication Systems in Dynamic Environments

Fan,

Yang,

Sun

et al. 2024

Preprint

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With gigahertz-level bandwidth, terahertz (THz) holds promise for achieving exceptionally high transmission rates in prospective sixth-generation (6G) communications. However, considerable loss poses an obstacle to THz communication. To compensate for this, massive multiple-input-multiple-output (MIMO) based beamforming is utilized to promote directional power with narrow beams in communication. In dynamic environments, the frequent adjustment of narrow beams results in fast time-varying channel state information (CSI), which constrains the application of the THz communication systems. While traditional deterministic-based and statistical-based channel tracking methods address different aspects of this issue, they suffer from balancing accuracy and complexity in the THz dynamic environments. To solve this problem, based on the cluster distribution of THz time-varying channel, we propose a novel hybrid channel tracking method that uses deterministic physical motion variation law to extract the cluster subspace, and then statistical Markov evolution models are applied within it. To achieve this, an integrated clustering and estimation method, clustering subspace matching pursuit (CSMP) is proposed for obtaining the channel clusters prior. Then based on above hybrid tracking method design, we propose a virtual cluster subspace turbo-approximate message passing (VCS-TAMP). Finally, several simulation results validate that our proposal achieves great improvement in both accuracy and computational time performance.

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Section: Introductionmentioning

confidence: 99%

Hybrid Channel Tracking for THz Massive MIMO Communication Systems in Dynamic Environments

Fan,

Yang,

Sun

et al. 2024

Preprint

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“…Also, resource-constrained IoT nodes have practical constraints such as limited energy, leading to the use of lightweight secrecy protocols to reduce the demand for resources. To this end, various physical-layer security (PLS) techniques have been investigated to provide protection through wiretap coding and smart signaling by exploiting the physical-layer properties of wireless channels [9]- [13].…”

Section: Introductionmentioning

confidence: 99%

Secure Short-Packet Communications via UAV-Enabled Mobile Relaying: Joint Resource Optimization and 3D Trajectory Design

Mamaghani,

Zhou,

Yang

et al. 2024

Preprint

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Short-packet communication (SPC) and unmanned aerial vehicles (UAVs) are anticipated to play crucial roles in the development of 5G-and-beyond wireless networks and the Internet of Things (IoT). In this paper, we propose a secure SPC system, where a UAV serves as a mobile decode-and-forward (DF) relay, periodically receiving and relaying small data packets from a remote IoT device to its receiver in two hops with strict latency requirements, in the presence of an eavesdropper. This system requires careful optimization of important design parameters, such as the coding blocklengths of both hops, transmit powers, and the UAV’s trajectory. While the overall optimization problem is nonconvex, we tackle it by applying a block successive convex approximation (BSCA) approach to divide the original problem into three subproblems and solve them separately. Then, an overall iterative algorithm is proposed to obtain the final design with guaranteed convergence. Our proposed low-complexity algorithm incorporates robust trajectory design and resource management to optimize the effective average secrecy throughput of the communication system over the course of the UAV-relay’s mission. Simulation results demonstrate significant performance improvements compared to various benchmark schemes and provide useful design insights on the coding blocklengths and transmit powers along the trajectory of the UAV.

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“…Last but not least, PLS has good compatibility with existing wireless communication systems, such as heterogeneous networks, visible light communication (VLC) systems, non-orthogonal multiple access (NOMA) networks, millimeter-wave networks, space-air-ground integrated network [6], and so on. In other words, PLS does not require large-scale modification or upgrading of existing systems, which means that PLS can be easily applied to a variety of communication scenarios and devices [7]- [21]. However, the PLS techniques also have some shortcomings.…”

Section: Introductionmentioning

confidence: 99%

Inspiring Physical Layer Security With RIS: Principles, Applications, and Challenges

Guo,

Lin,

et al. 2024

IEEE Open J. Commun. Soc.

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With the commercialization of the fifth generation mobile networks, researchers are now focusing on discovering the potential key techniques of the next generation mobile networks, which are expected to provide more accurate perception, lower latency, and higher network capacity. As the communication equipments increase exponentially, wireless transmission environment becomes more complex, leveraging wireless security challenges more and more severe, such as computationally powerful interception, intelligent malicious jamming, communication behavior monitoring. The physical layer security (PLS) techniques have been widely explored as a complement to traditional encryption schemes by exploiting the randomness characteristics of wireless channels to achieve the security from the physical layer. Additionally, reconfigurable intelligent surface (RIS) is considered as a key enabling technology for the six generation (6G) mobile networks, due to its ability to achieve the reconstruction of wireless channel, which is also regarded as a good match with PLS techniques for improving communication security. This paper presents a comprehensive review of the latest research on the integration of RIS and PLS. First, we introduce the principles of PLS from the development of secure communications and the basics of RIS based on the generalized Snell's law. Then, we categorize RIS according to different hardware architectures, of which the corresponding scenarios are also presented. Subsequently, we review recent works on RIS-assisted PLS in different communication networks, and classify the security scenarios in which RIS is integrated with various advanced communication technologies. Finally, we discuss the potential future research directions and challenges of RIS-aided PLS communications.INDEX TERMS Reconfigurable intelligent surfaces, physical layer security, secure communications, 6G.

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Terahertz Communications for Massive Connectivity and Security in 6G and Beyond Era

Cited by 16 publications

References 16 publications

Hybrid Channel Tracking for THz Massive MIMO Communication Systems in Dynamic Environments

Hybrid Channel Tracking for THz Massive MIMO Communication Systems in Dynamic Environments

Secure Short-Packet Communications via UAV-Enabled Mobile Relaying: Joint Resource Optimization and 3D Trajectory Design

Inspiring Physical Layer Security With RIS: Principles, Applications, and Challenges

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