ITR: High Speed Internet Access in Buildings using Heating and Ventilation Ducts

ITR：使用供暖和通风管道的建筑物内的高速互联网接入

• 批准号: 0219278
• 负责人: Daniel Stancil
• 金额: $ 29.53万
• 依托单位: Carnegie-Mellon University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2002
• 资助国家: 美国
• 起止时间: 2002-08-01 至 2005-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0219278&HistoricalAwards=false
• 关键词: ITR; Speed; Internet; Access; Buildings

0219278StancilHigh-speed internet access in buildings (residential, office, and commercial) is one of the most important challenges that next generation wireless networks face today. Further, modern buildings have complex communications infrastructures that may include provisions for building controls, alarms, wired and wireless telephones, high-speed data services, and wireless LANs. At present, these services are provided with separate wired/wireless systems for each service.An alternative approach to providing the communications infrastructure in buildings is to recognize that every building is already equipped with a microwave distribution system: the heating and ventilation (HVAC) ducts. These ducts are designed to carry air to and from all parts of the building, but can also function as hollow metal waveguides for microwave signals. Combining the HVAC with communications to form a single integrated system could lead to a new paradigm in smart building infrastructure. If widely adopted, the impact of this research could be very far-reaching, potentially impacting the design and construction of every major new building constructed throughout the developed world.For the most common duct sizes and communication frequencies, the ducts behave as multimode waveguides. The possibility of using multimode waveguides for microwave communications was first suggested more than 50 years ago, although the detailed channel characteristics have not been fully investigated. The goals of this proposal are to gain an understanding of mode scattering and conversion at common duct components such as bends, tees, and wyes, and to investigate how the multimode nature of the channel can be used to increase the capacity of the channel.To investigate the mode conversion and scattering, a multiple-antenna structure will be constructed that is capable of exciting specific modes or combinations of modes. The mode content upon passing through a component under study will be determined by scanning the near-field mode profile at the open exit end of the duct. The possibility of increasing the capacity of the duct will be investigated by constructing a pair of multiple antenna arrays for use as input and output and output couplers. Multiple-input/multiple-output multipath channel techniques will be used to demonstrate realization of two independent channels in the same frequency band.Two graduate students will be fully supported by this research. The topic provides a novel context for mastering concepts in microwave measurements, wireless channel models, channel capacity, and network architecture. Undergraduates will also be involved in the research for project credit.The results from the research will be presented at major international wireless conferences, and detailed papers will be submitted to archival journals to further disseminate the results. These presentations and papers also offer significant opportunities for the graduate students to hone their presentation and writingskills.Finally, results from the research will be used as examples and case studies in the introductory graduate Wireless Communications course offered each year. This course typically enrolls 50-60 students.

0219278Stancil 建筑物（住宅、办公室和商业）中的高速互联网接入是下一代无线网络当今面临的最重要挑战之一。此外，现代建筑物具有复杂的通信基础设施，其中可能包括建筑物控制、警报、有线和无线电话、高速数据服务和无线LAN的设施。目前，这些服务是通过单独的有线/无线系统为每项服务提供的。在建筑物中提供通信基础设施的另一种方法是认识到每座建筑物都已经配备了微波分配系统：供暖和通风 (HVAC) 管道。这些管道旨在将空气输送到建筑物的各个部分或从建筑物的各个部分输送空气，但也可以用作微波信号的空心金属波导。将 HVAC 与通信相结合形成一个集成系统可能会带来智能建筑基础设施的新范例。如果被广泛采用，这项研究的影响可能会非常深远，可能会影响发达国家每座主要新建筑的设计和施工。对于最常见的管道尺寸和通信频率，管道表现为多模波导。使用多模波导进行微波通信的可能性早在 50 多年前就被首次提出，尽管详细的信道特性尚未得到充分研究。该提案的目标是了解常见管道组件（例如弯头、T 形件和 Y 形件）的模式散射和转换，并研究如何利用通道的多模特性来增加通道的容量。研究模式转换和散射，将构建能够激发特定模式或模式组合的多天线结构。通过所研究的部件时的模式内容将通过扫描管道开放出口端的近场模式轮廓来确定。将通过构建一对多天线阵列用作输入、输出和输出耦合器来研究增加管道容量的可能性。多输入/多输出多径信道技术将用于演示在同一频带内实现两个独立信道。这项研究将全力支持两名研究生。本主题为掌握微波测量、无线信道模型、信道容量和网络架构等概念提供了新颖的背景。本科生还将参与研究以获得项目学分。研究结果将在主要的国际无线会议上发表，详细论文将提交给档案期刊以进一步传播研究结果。这些演讲和论文还为研究生提供了磨练演讲和写作技巧的重要机会。最后，研究结果将用作每年提供的研究生入门无线通信课程的示例和案例研究。该课程通常招收 50-60 名学生。