Terabit Bidirectional Multi-user Optical Wireless System (TOWS) for 6G LiFi

适用于 6G LiFi 的太比特双向多用户光学无线系统 (TOWS)

• 批准号: EP/S016570/2
• 负责人: Jaafar Elmirghani
• 金额: $ 470.55万
• 依托单位: King's College London
• 依托单位国家: 英国
• 项目类别: Research Grant
• 财政年份: 2022
• 资助国家: 英国
• 起止时间: 2022 至 无数据
• 项目状态: 未结题
• 来源: https://gtr.ukri.org/projects?ref=EP%2FS016570%2F2
• 关键词: Terabit; Bidirectional; Multi; user; Optical

Given the unprecedented demand for mobile capacity beyond that available from the RF spectrum, it is natural to consider the infrared and visible light spectrum for future terrestrial wireless systems. Wireless systems using these parts of the electromagnetic spectrum could be classified as nmWave wireless communications system in relation to mmWave radio systems and both are being standardised in current 5G systems. TOWS, therefore, will provide a technically logical pathway to ensure that wireless systems are future-proof and that they can deliver the capacities that future data intensive services such as high definition (HD) video streaming, augmented reality, virtual reality and mixed reality will demand. Light based wireless communication systems will not be in competition with RF communications, but instead these systems follow a trend that has been witnessed in cellular communications over the last 30 years. Light based wireless communications simply adds new capacity - the available spectrum is 2600 times the RF spectrum.6G and beyond promise increased wireless capacity to accommodate this growth in traffic in an increasingly congested spectrum, however action is required now to ensure UK leadership of the fast moving 6G field. Optical wireless (OW) opens new spectral bands with a bandwidth exceeding 540 THz using simple sources and detectors and can be simpler than cellular and WiFi with a significantly larger spectrum. It is the best choice of spectrum beyond millimetre waves, where unlike the THz spectrum (the other possible choice), OW avoids complex sources and detectors and has good indoor channel conditions. Optical signals, when used indoors, are confined to the environment in which they originate, which offers added security at the physical layer and the ability to re-use wavelengths in adjacent rooms, thus radically increasing capacity. Our vision is to develop and experimentally demonstrate multiuser Terabit/s optical wireless systems that offer capacities at least two orders of magnitude higher than the current planned 5G optical and radio wireless systems, with a roadmap to wireless systems that can offer up to four orders of magnitude higher capacity.There are four features of the proposed system which make possible such unprecedented capacities to enable this disruptive advance. Firstly, unlike visible light communications (VLC), we will exploit the infrared spectrum, this providing a solution to the light dimming problem associated with VLC, eliminating uplink VLC glare and thus supporting bidirectional communications. Secondly, to make possible much greater transmission capacities and multi-user, multi-cell operation, we will introduce a new type of LED-like steerable laser diode array, which does not suffer from the speckle impairments of conventional laser diodes while ensuring ultrahigh speed performance. Thirdly, with the added capacity, we will develop native OW multi-user systems to share the resources, these being adaptively directional to allow full coverage with reduced user and inter-cell interference and finally incorporate RF systems to allow seamless transition and facilitate overall network control, in essence to introduce software defined radio to optical wireless. This means that OW multi-user systems can readily be designed to allow very high aggregate capacities as beams can be controlled in a compact manner. We will develop advanced inter-cell coding and handover for our optical multi-user systems, this also allowing seamless handover with radio systems when required such as for resilience. We believe that this work, though challenging, is feasible as it will leverage existing skills and research within the consortium, which includes excellence in OW link design, advanced coding and modulation, optimised algorithms for front-haul and back-haul networking, expertise in surface emitting laser design and single photon avalanche detectors for ultra-sensitive detection.

考虑到对移动容量的前所未有的需求超出了RF频谱，因此自然要考虑未来陆地无线系统的红外且可见的光谱。使用电磁频谱的这些部分的无线系统可以归类为与MMWave无线电系统相关的NMWave无线通信系统，并且两者都在当前的5G系统中进行标准化。因此，TOWS将提供一条在技术上合乎逻辑的途径，以确保无线系统是防线的，并且可以提供未来数据密集型服务（例如高清（HD）视频流，增强现实，虚拟现实和混合现实的能力）的能力。基于光的无线通信系统将不会与RF通信竞争，而是这些系统遵循了过去30年中蜂窝通信中见证的趋势。基于轻型的无线通信仅增加了新的容量 - 可用的光谱是RF光谱的2600倍，超越承诺提高了无线能力，以适应日益拥挤的频谱中这种交通增长的能力，但是现在需要采取行动来确保英国在快速移动6G领域的领导。光学无线（OW）使用简单源和检测器打开具有超过540 THZ的新光谱带，并且比蜂窝和WiFi更简单，并且光谱较大。它是毫米超过毫米波的最佳选择，与THZ光谱不同（另一个可能的选择），OW避免了复杂的来源和检测器，并且具有良好的室内通道条件。当使用在室内使用时，光信号仅限于它们起源的环境，该环境在物理层提供了安全的安全性以及在相邻房间中重新使用波长的能力，从而从极大地增加了容量。我们的愿景是开发和实验证明多源Terabit/s光学无线系统，这些系统至少比目前计划的5G光学和无线无线系统高两个数量级高两个数量级，并具有与无线系统的路线图，可提供多达四个数量级的能力高度更高的能力，这使得拟议中的系统的四个功能使得这种不可限制的能力可以实现这种不利的推销。首先，与可见光通信（VLC）不同，我们将利用红外光谱，这为与VLC相关的光调度问题提供了解决方案，消除了上行链路VLC眩光，从而支持双向通信。其次，为了使更大的传输能力和多用户多电池操作，我们将引入一种新型的类似LED的可辨认激光二极管阵列，在确保超高速度性能的同时，它不会遭受传统激光二极管的斑点损害。第三，随着额外的容量，我们将开发本机OW多用户系统来共享资源，这些系统是适应性的，可以通过减少的用户和细胞间干扰允许全面覆盖，并最终合并RF系统以允许无缝的过渡并促进整体网络控制，从本质上讲，将软件定义无线电引入软件无线电。这意味着可以很容易地设计多用户系统，以允许高骨料容量，因为可以以紧凑的方式控制梁。我们将为我们的光学多用户系统开发先进的间层间编码和交换，这也允许在需要时无线电系统的无缝切换，例如弹性。我们认为，这项工作虽然具有挑战性，但它是可行的，因为它将利用财团内的现有技能和研究，其中包括卓越的OW链接设计，高级编码和调制，优化的用于前船长和后霍尔网络的算法，在表面发射激光设计方面的专业知识以及超级敏感检测的单个光子雪崩检测器。

项目成果

Energy Efficient UAV-Based Service Offloading Over Cloud-Fog Architectures

• DOI: 10.1109/access.2022.3201112
• 发表时间: 2022-05
• 期刊: IEEE Access
• 影响因子: 3.9
• 作者: Hatem A. Alharbi;B. Yosuf;M. Aldossary;Jaber Almutairi;J. Elmirghani

8.2 Gbps Optical Wireless Link Using SiPM at NIR Wavelength

• DOI: 10.1109/jlt.2023.3320030
• 发表时间: 2024-03-01
• 期刊: JOURNAL OF LIGHTWAVE TECHNOLOGY
• 影响因子: 4.7
• 作者: Ali，Wajahat;Chen，Rui;Penty，Richard V.
• 通讯作者: Penty，Richard V.

Energy Efficient Placement of ML-Based Services in IoT Networks

• DOI: 10.1109/meditcom55741.2022.9928668
• 发表时间: 2022-03
• 期刊: 2022 IEEE International Mediterranean Conference on Communications and Networking (MeditCom)
• 作者: M. M. Alenazi-M.;B. Yosuf;S. Mohamed;T. El-Gorashi;J. Elmirghani

WDM/TDM over Passive Optical Networks with Cascaded-AWGRs for Data Centers

用于数据中心的无源光网络上的 WDM/TDM 和级联 AWGR

• DOI: 10.1109/icton59386.2023.10207304
• 发表时间: 2023
• 作者: Alharthi M

Rate Splitting for 6G Optical Wireless Networks

6G 光无线网络的速率分割

• DOI: 10.1109/icton59386.2023.10207223
• 发表时间: 2023
• 作者: Alazwary K