MRI Consortium: Development of Wireless Networking Testbed and Emulator (WiNeTestEr)

提案#：10-40422与提案#：10-40429PI(S)：普拉卡什、拉维·拉詹、迪内什·班纳吉、巴斯卡；米塔尔、尼拉杰、文卡特桑、S&P；坎普、约瑟夫、陈、景洪、桂、平研究所(S)：德克萨斯大学达拉斯分校南卫理公会大学标题：磁共振成像/开发财团：开发无线网络测试床和仿真器(WiNeTestEr)项目建议：该项目建议建立一个通用的无线网络测试床和仿真器(WiNeTestEr)。此试验台的主要目标和新颖性在于其能够在多个许可和非许可频段中仿真大规模无线网络，-允许本地和远程用户访问以配置和控制相同的仿真器，并提供重复性，-支持与节点移动性、多天线(MIMO)操作和认知无线电相关的实验，以及-为远程运行无线实验提供易于使用的界面。为此，该提案提出了模拟多径效应的方法，例如通过将来自节点的模拟RF信号转换成数字基带、使用FPGA将其缓冲一段时间、添加经历了不同延迟量的信号的缩放版本、以及最后将所得到的信号转换回模拟域。为了模拟多用户干扰，该方案建议将来自不同节点的射频信号馈入射频组合器，然后馈入接收节点-S天线。文中还讨论了其他通道效应。它计划模拟不同的无线环境，并考虑到高达数百个无线节点的可扩展性。WiNeTestEr的设计是稳健的，因为它将使用同轴电缆将无线节点连接到仿真器，以模拟它们之间的空中链路。这样，网络就不会受到实验室和环境中其他设备的干扰。该仪器的使用包括硬件和软件方面的新开发，例如用于仿真各种通道效果的新型宽带RF电路和板、可同时在多个频段上运行的新型RF组合器，以及包括算法设计、并行仿真器进程控制和网络管理在内的软件工具。

Proposal #: 10-40422 Collaborative with Proposal #: 10-40429PI(s): Prakash, Ravi & Rajan, Dinesh Banerjee, Bhaskar; Mittal, Neeraj, Venkatesan,S. & Camp, Joseph, Chen, Jinghong, Gui, PingInstitution(s): University of Texas-Dallas & Southern Methodist UniversityTitle: MRI/Dev Consortium: Dev. of Wireless Networking Testbed and Emulator (WiNeTestEr) Project Proposed:This project proposes to build a versatile wireless networking testbed called Wireless Networking Testbed and Emulator (WiNeTestEr). The main objectives and the novelty of this testbed is in its capability to - Emulate the large-scale wireless networks in multiple licensed and unlicensed bands, - Allow access to local and remote users to configure and control the same emulator, and provide repeatability,- Support experiments related to node mobility, multi-antenna (MIMO) operation, and cognitive radios, and - Provide an easy-to-use interface for remotely running wireless experiments overThe main intellectual challenge is in fundamental difficulties to emulate the analog nature of wireless channels and the related effects, such as attenuation, multipath fading and multi-user interference. To this end the proposal addresses methods to emulate the multipath effect, such as by converting the analog RF signal from a node into digital baseband, buffer it for a period of time using an FPGA, add scaled versions of the signals that have experienced different amounts of delay, and finally, convert the resulting signal back into the analog domain. To emulate multi-user interference, the proposal suggests that RF signals from different nodes are fed into an RF combiner and then into a receiving node?s antenna. Other channel effects are also addressed. It is planed to emulate different wireless environments with consideration of scalability up to hundreds of wireless nodes. The design of the WiNeTestEr is robust, as it will use coaxial cables to connect the wireless nodes to the emulator which mimics the over-the-air link between them. In this way, the network should be immune to interference from other devices in the laboratory and the environment. The usage of the instrument includes novel developments in both hardware and software, such as new wideband RF circuits and boards for emulation emulate a variety of channel effects, a new RF combiner that can simultaneously operate over multiple bands, and a software tool that includes algorithm design, control of parallel emulator processes, and network management.