NRT: Agile and Efficient Ultra-Wideband Wireless Network Testbed for Challenged Environments

无处不在的高带宽网络服务的出现促使人们探索使用不断增加的频谱频带，通常是在要求苛刻的环境中，并超过已经用于传统系统的带宽部分。超宽带（UWB）的发展趋势给网络、通信设计和硬件开发带来了巨大的挑战。我们的目标是提供一个网络，使最好地利用thesources可用的节点，能源和带宽。为此，我们是信号不可知论者。而不是提出一个信令方案，并构建一个网络architecturepredicted上，具体的计划，我们提出了一个测试平台上建立一个灵活的架构，提供网络的最有用的控制能力，在不同的操作conditions.The研究人员提出了一个综合的方法，考虑网络，通信设计和硬件开发的UWB网络联合。这些设计组件的集成需要大量的跨层交互。由于超宽带系统及其特性带来的新机遇，物理层以上的网络层可以充分利用并设计具有上级性能的网络。因此，我们将探讨网络层协议，使其路由决定的基础上，随时间变化的UWB链路状态和动态的流量需求;传输层协议，处理错误和拥塞，在更有效的方式和综合架构，是共同优化跨层。智力价值：智力价值，我们提出的工作是在以下几个方面：一种网络架构和试验平台，以灵活的方式使用不同的通信配置。首次尝试将超宽带集成到网络系统中，开发跨层方法以优化网络性能，并对较低层具有简约但有效的可见性。时域和频域的双重开发-域通信系统允许网络在衰落、带宽和能量方面使信令方案适应特定环境。这些系统的挑战在于这些节点在CMOS中的高效和高性能实现，并展示在thenetwork .Broader影响中的共存性：我们提出的活动将研究和教育发展紧密结合，并将以自然和独特的方式整合通信理论，网络和硬件设计。我们将介绍一个定量的，系统的，我们相信，fundamentalapproach超宽带网络通信。特别是，我们的方法将允许该领域超越任意和不灵活的以信令为中心的方法，并转向基于网络要求和基本通信考虑的架构。我们的方法的教育影响将在课堂教育和研究生和本科生的跨学科研究中发挥作用。研究人员已经开始了一项广泛的教育工作，将无线技术带入课堂。首先，两位研究人员正在开发一门研究生水平的无线通信课程。第二，其中一位研究人员正在将无线硬件纳入麻省理工学院的本科数字设计实验室课程。最后，两名研究人员已经开始了一个联合研究生水平的教学项目，结合网络的应用和分析.

The emergence of ubiquitous high-bandwidth networked services has prompted theexploration of using ever-increasing bands of spectrum, often in demanding environments andover bandwidth portions that are already in use for legacy systems. This trend, which we looselylabel ultra-wideband (UWB), poses significant challenges for networking, communicationsdesign and hardware development. Our goal is to provide a network that makes best use of theresources available in terms of nodes, energy and bandwidth. To that end, we are signaling-agnostic. Rather than propose a signaling scheme and construct a network architecturepredicated on that specific scheme, we propose a testbed built upon an agile architecture thatprovides the network the most useful control capabilities under varying operating conditions.The researchers propose an integrated approach for UWB networks that considers networking,communications design and hardware development jointly. The integration of these designcomponents requires significant cross-layer interaction. Due to the new opportunities of ultra-wideband systems and its properties, network layers above the Physical Layer can take fulladvantage and design a network with superior performance. Thus, we will explore NetworkLayer protocols that make its routing decisions based on the time-varying UWB link states anddynamic traffic demands; Transport Layer protocols that deals with errors and congestion inmuch more efficient manner and an integrated architecture that is jointly optimized across-layers.Intellectual merit: The intellectual merit of our proposed work is in the following areas:A network architecture and testbed that make use, in an agile manner, of differentcommunication configurations.The first attempt at integrating ultra-wide-band into a networked system, an important andnecessary step in the development of this technologyThe development of a cross-layer approach to optimize network performance withparsimonious but effective visibility into lower layers.The dual development of time-domain and frequency-domain communication systemsallowing the network to adapt the signaling scheme to the specific environment in termsof fades, bandwidth and energy. The challenges of these systems lie in the efficient and highperformance implementation of these nodes in CMOS and demonstrate co-existence in thenetwork .Broader impact: Our proposed activity couples research and educational development closelyand will integrate communication theory, networking and hardware design in a natural andunique fashion. We will introduce a quantitative, systematic and, we believe, fundamentalapproach to UWB networked communications. In particular, our approach will allow the field tomove beyond an arbitrary and inflexible signaling-centric approach, and move towardsarchitectures based on network requirements and fundamental communications considerations.The educational impact of our approach will be in both classroom education and cross-disciplinary research for graduate and undergraduate students. The researchers have alreadybegun an extensive educational effort to bring wireless technology into the classroom. First, twoof the researchers are developing a graduate-level wireless communication course. Secondly, oneof the researchers is incorporating wireless hardware in undergraduate digital design laboratorycoursework at MIT. Finally two of the researchers have begun a joint graduate-level teachingproject combining application and analysis of networking.