CAREER: Leveraging Simultaneous Access to Multiple Frequency Bands in Multihop Wireless Networks

由于最近FCC频带的重新分配的高潮和无线设备复杂性的加速，同时接入多个不同的无线频带正变得越来越现实。自然地，问题出现了：如何能够同时访问具有不同传播和通信能力的宽范围的频带，以改善当前的无线网络性能？在这个职业生涯的研究，奠定了基础，利用多个频段的多跳无线网络从每链路到网络范围的决策。为此，该项目在一系列设备和测试平台上使用了实验设计、测量分析、分析建模和嵌入式编程，这些设备和测试平台从通过应用程序下载全球可访问的移动的电话到实验室和现场无线基础设施。1）通过利用移动的电话测量和在-在多个频带上的现场试验，2）用于可扩展的多频带架构的网络规划框架，其使用经验和分析模型来预测跨不同频带集合的异构拓扑结构的容量，以及3）由信道可变性的实时测量引导的跨多个无线频带协调和适配链路参数的协议，对环境背景的理解，以及基于历史表现的在线培训。作为工作的结果，多跳无线网络的研究人员，开发人员和基础设施提供商可以利用该框架，通过可用的实验数据，分析模型开发和协议设计，在广泛的网络协议，拓扑结构和环境中利用多个频带。

Due to the culmination of the recent reapportionment of FCC frequency bands and the acceleration of wireless device complexity, simultaneous access to multiple diverse wireless frequency bands is becoming more of a reality. Naturally, the question arises: How can simultaneous access to a wide range of frequency bands with distinct propagation and communication capabilities improve current wireless network performance? In this CAREER research, a foundation is laid for exploiting multiple frequency bands for multihop wireless networks from per-link to network-wide decisions. To do so, this project uses experimental design, measurement analysis, analytical modeling, and embedded programming on an array of devices and testbeds from mobile phones globally reachable via application downloads to in-lab and in-the-field wireless infrastructures.There are three key innovations to the work: 1) An experimental characterization for multiple frequency band propagation characteristics by leveraging mobile phone measurements and in-field trials on a number of frequency bands, 2) A network planning framework for scalable, multiband architectures that uses empirical and analytical models for capacity prediction of heterogeneous topological formations across a diverse set of frequency bands, and 3) Protocols that coordinate and adapt link parameters across multiple wireless frequency bands, guided by real-time measurements of channel variability, an understanding of environmental context, and on-line training based on historical performance. As a result of work, multihop wireless network researchers, developers, and infrastructure providers can leverage the framework to exploit multiple frequency bands in a broad class of network protocols, topologies, and environments via available experimental data, analytical model development, and protocol design.