Secured THz communication in photonic microcell networks based on spatial wave mixing of steered beams

IF 1.9 4区 计算机科学 Q3 COMPUTER SCIENCE, INFORMATION SYSTEMS Optical Switching and Networking Pub Date : 2024-06-07 DOI:10.1016/j.osn.2024.100773
Ming Che , Hanwei Chen , Yuta Ueda , Kazutoshi Kato
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引用次数: 0

Abstract

Future 6G communication systems are envisioned to expand their carrier frequency to the THz region, where a broad unexplored region of spectrum is available. With this expansion, THz wireless communication has the potential to achieve ultra-high data transmission rates of up to 100 Gbit/s. However, as large amounts of data are transmitted in an open wireless environment, there are significant concerns regarding communication security due to the susceptibility to eavesdropping, interception, and jamming. In this work, we proposed a secure approach for THz wireless communication based on spatial wave mixing and flexible beam steering. To achieve this, two frequency-modulated THz waves, which are generated by photonic THz sources and carry encrypted information with true randomness, are mixed at a THz envelope detector with an exclusive-OR logic operation. We analyzed the possible spatial location for the THz detector to ensure a secure microcell network deployment. Our results demonstrate that the size of the decryptable region is directly dependent on the directivity and width of the emitted THz beam. To address this, we have developed an array antenna with integrated uni-traveling-carrier photodiodes (UTC-PDs), which is capable of generating THz waves while also improving the flexibility of beam pointing, allowing for greater control over the location and size of the decodable region. By controlling fiber-optic delay lines, we successfully demonstrated that the directional gain of a 200 GHz wave is increased by 8 dB through a 1 × 3 UTC-PD-integrated planar bowtie antenna (PBA) array, together with continuous beam steering from -20° to 10°. Additionally, using a 1 × 4 UTC-PD-integrated PBA array to emulate two encryption transmitters and a Femi-level managed barrier diode to detect spatially mixed THz waves, we successfully achieved a feasibility experiment for real-time 200 Mbit/s location-based decryption in the 200 GHz band. These results indicate that the proposed scheme is feasible for secured THz communication, and would be a powerful candidate to mitigate security risks in 6G microcell networks.

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基于转向光束空间波混合的光子微蜂窝网络中的安全太赫兹通信
根据设想,未来的 6G 通信系统将把载波频率扩展到太赫兹区域,因为太赫兹区域的频谱尚未被开发。随着这一扩展,太赫兹无线通信有可能实现高达 100 Gbit/s 的超高数据传输速率。然而,由于大量数据是在开放的无线环境中传输的,容易受到窃听、拦截和干扰,因此通信安全问题备受关注。在这项工作中,我们提出了一种基于空间波混合和灵活波束转向的太赫兹无线通信安全方法。为了实现这一目标,两个由光子太赫兹源产生并携带真正随机性加密信息的频率调制太赫兹波在太赫兹包络探测器上通过排他-OR逻辑运算进行混合。我们分析了太赫兹探测器的可能空间位置,以确保微蜂窝网络部署的安全性。我们的结果表明,可解密区域的大小直接取决于发射太赫兹光束的方向性和宽度。为了解决这个问题,我们开发了一种集成了单程载波光电二极管(UTC-PD)的阵列天线,它既能产生太赫兹波,又能提高光束指向的灵活性,从而能够更好地控制可解密区域的位置和大小。通过控制光纤延迟线,我们成功地演示了通过 1 × 3 UTC-PD 集成平面弓形天线 (PBA) 阵列将 200 GHz 波的定向增益提高了 8 dB,并实现了 -20° 至 10° 的连续波束转向。此外,我们使用 1 × 4 UTC-PD 一体化 PBA 阵列模拟两个加密发射器,并使用一个 Femi-level 管理型势垒二极管检测空间混合太赫兹波,成功实现了 200 GHz 频段内基于位置的 200 Mbit/s 实时解密的可行性实验。这些结果表明,所提出的方案在太赫兹安全通信方面是可行的,将成为降低 6G 微蜂窝网络安全风险的有力候选方案。
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来源期刊
Optical Switching and Networking
Optical Switching and Networking COMPUTER SCIENCE, INFORMATION SYSTEMS-OPTICS
CiteScore
5.20
自引率
18.20%
发文量
29
审稿时长
77 days
期刊介绍: Optical Switching and Networking (OSN) is an archival journal aiming to provide complete coverage of all topics of interest to those involved in the optical and high-speed opto-electronic networking areas. The editorial board is committed to providing detailed, constructive feedback to submitted papers, as well as a fast turn-around time. Optical Switching and Networking considers high-quality, original, and unpublished contributions addressing all aspects of optical and opto-electronic networks. Specific areas of interest include, but are not limited to: • Optical and Opto-Electronic Backbone, Metropolitan and Local Area Networks • Optical Data Center Networks • Elastic optical networks • Green Optical Networks • Software Defined Optical Networks • Novel Multi-layer Architectures and Protocols (Ethernet, Internet, Physical Layer) • Optical Networks for Interet of Things (IOT) • Home Networks, In-Vehicle Networks, and Other Short-Reach Networks • Optical Access Networks • Optical Data Center Interconnection Systems • Optical OFDM and coherent optical network systems • Free Space Optics (FSO) networks • Hybrid Fiber - Wireless Networks • Optical Satellite Networks • Visible Light Communication Networks • Optical Storage Networks • Optical Network Security • Optical Network Resiliance and Reliability • Control Plane Issues and Signaling Protocols • Optical Quality of Service (OQoS) and Impairment Monitoring • Optical Layer Anycast, Broadcast and Multicast • Optical Network Applications, Testbeds and Experimental Networks • Optical Network for Science and High Performance Computing Networks
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