Future Wireless Networks: Spectral Efficiency, Networking and Security

未来无线网络：频谱效率、网络和安全

• 批准号: RGPIN-2015-03716
• 负责人: Khandani, Amir
• 金额: $ 2.7万
• 依托单位: University of Waterloo
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2016
• 资助国家: 加拿大
• 起止时间: 2016-01-01 至 2017-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=612522
• 关键词: Future; Wireless; Networks; Spectral; Efficiency

The growth in Internet traffic has triggered many new research challenges in the volume of information and how fast data must be exchanged.  Wireless, as the dominant access technology of the future, is vital to this development. In response, wireless networks have been evolving to support higher data rates and wider coverage, at a lower cost. The bottleneck in wireless connectivity is the spectrum, a scarce natural resource with an exorbitant price. As an example, in January 2014, an auction for 68 MHz of UHF spectrum (formerly used for terrestrial TV broadcasting) was held in Canada. Eight Canadian companies won the auction, with total value of $5.27bn. The problem is that, regardless of the cost, the available spectrum is already exploited/overcrowded.  New technologies are needed to meet the demands in servicing an ever-escalating amount of mobile traffic using the available spectrum. In spite of this need, breakthroughs with practical implications have been scarce. Multiple-Input Multiple-Output (MIMO) antenna systems, developed in late 90’s, resulted in a significant improvement and soon found its way in wireless products. After MIMO, a more recent breakthrough, Interference Alignment (IA) was introduced by the PI’s team. IA has attracted significant attention, however, its practical implementation remains challenging.  To address the future needs, three interrelated areas need attention: "transmission rate", "networking" and "security". The proposed research addresses these three areas under one umbrella. The problems of "transmission rate" and "networking" are primarily handled relying on "full-duplex wireless", while a novel technique called "media-based modulation" is applied to increase spectral efficiency and deal with channel fading.  Full-duplex wireless is a new engine, paving the way to a whole new world of unexplored possibilities in improving throughput, reliability, speed and security. The proposed research covers some novel applications in these domains, from security to network management, interference rejection and cognitive transmission.  Research also includes new directions in cooperative communications, distributed/collaborative signaling, use of massive constellations, and network information theory. Proposed research will study new techniques to increase the point-to-point spectral efficiency, and reliability. It also addresses some key issues in conjunction with emerging communications paradigms envisioned in the so-called "Internet of Things" (IoT), such as low delay, open loop transmission.  To keep up with the cost of implementing many more cells, ‘Cloud Radio Access Networks (CRAN)’ is pursued as a mechanism to share resources. Proposed research will investigate the issue of front-haul/back-haul connectivity in CRAN. Findings of the proposed research are expected to have a profound impact on the future generations of wireless networks.

互联网流量的增长引发了信息量的许多新研究挑战，以及必须更改数据的速度。无线作为未来的主要访问技术，对这一发展至关重要。作为响应，无线网络已经不断发展，以支持更高的数据速率和更广泛的覆盖范围，成本较低。无线连接性的瓶颈是频谱，这是一种稀缺的自然资源，价格高昂。例如，2014年1月，在加拿大举行了68 MHz UHF Spectrum（以前用于地面电视广播）的拍卖。加拿大八家公司赢得了拍卖，总价值为52.7亿美元。问题在于，无论成本如何，可用的频谱已经被利用/人满为患。需要新技术来满足使用可用范围为不断升级的移动流量服务的需求。尽管有这种需要，但具有实际影响的突破仍然很少。在90年代后期开发的多输入多输出（MIMO）天线系统导致了显着改善，并很快在无线产品中找到了它。在MIMO之后，PI团队引入了近期突破，干预一致性（IA）。 IA引起了极大的关注，但是，其实际实施仍然受到挑战。为了满足未来需求，三个相互关联的领域需要注意：“传输速率”，“网络”和“安全”。拟议的研究涉及一个雨伞下的这三个领域。 “传输速率”和“网络”的问题主要依赖于“全双工无线”，而一种称为“基于媒体的调制”的新技术用于提高频谱效率并处理频道褪色。 Full Duplex Wireless是一种新的引擎，为改善吞吐量，可靠性，速度和安全性的全新世界铺平了道路。拟议的研究涵盖了这些领域的一些新应用，从安全到网络管理，干扰拒绝和认知传播。研究还包括合作通信，分布式/协作信号，大规模星座的使用和网络信息理论的新方向。拟议的研究将研究提高点对点光谱效率和可靠性的新技术。它还与所谓的“物联网”（IoT）中设想的新兴通信范式结合了一些关键问题，例如低延迟，开放循环传输。为了跟上实施更多单元的成本，“云无线电访问网络（CRAN）”被追求作为共享资源的一种机制。拟议的研究将调查Cran中前Haul/Back-Haul连接性的问题。拟议研究的发现预计将对后代的无线网络产生深远的影响。