NeTS-NR: Using Signal Propagation Emulation to Understand and Improve Wireless Networks

NETS-NR：使用信号传播仿真了解和改进无线网络CMU奖0434824摘要无线网络已经成为日常生活的一部分，但由于无法进行可重复和现实的实验，旨在评估和改进无线协议的研究受到阻碍。有线网络中使用的技术不足以分析无线网络，因为无线物理层会影响所有协议层的运行；此外，无线链路多变、容易出错，并且受到外部不可控源的影响。该项目正在开发一种系统，可以准确地模拟无线信号在物理空间中的传播。该项目还在开发逼真的信号传播模型，并进行实验，以了解各种技术，如WiFi、蓝牙和软件定义无线电如何受到物理层的影响。通过结合模拟和真实世界实验的许多好处，该仿真器可以产生巨大的研究影响。由于仿真器可以在网络上共享，因此可以集成到现有的试验台中。它还可以让远程小组比较实际的结果。此外，该仿真器还可以在现实的、“安全的”隔离环境中支持实际操作的无线课程项目，从而帮助教育。基于仿真器的实验将显著提高对信号传播如何影响媒体访问控制层性能的理解，并使改进的协议的开发成为可能。该项目还将产生一套现实的信号传播模型。最后，本项目将量化竞争无线协议在各种真实模拟的物理环境中的相对优势和劣势。项目成果将通过出版物、允许远程研究人员使用仿真器以及课程项目等教育活动来传播。

NeTS-NR: Using Signal Propagation Emulation to Understand and ImproveWireless NetworksPeter Steenkiste, CMUAward 0434824AbstractWireless networking has become a part of everyday life, but research aimed at evaluating and improving wireless protocols is hindered by the inability to perform repeatable and realistic experiments. Techniques used in wired networks are inadequate for analyzing wireless networks since the wireless physical layer affects operation at all protocol layers; moreover, wireless links are variable, error-prone, and affected by external uncontrolled sources.This project is developing a system that accurately emulates wireless signal propagation in a physical space. The project is also developing realistic signal propagation models, and conducting experiments to see how diverse technologies such as WiFi, Bluetooth, and software defined radios are affected by the physical layer.By combining many benefits of simulation and real world experimentation, the emulator can have a dramatic research impact. Since the emulator can be shared over the network, it can be integrated into existing testbeds. It can also enable remote groups to compare realistic results. Moreover, the emulator can aid education by supporting hands-on wireless course projects in a realistic, "safe" isolated environment. Emulator-based experiments will significantly improve understanding of how signal propagation affects medium access control layer performance, and enable the development of improved protocols. This project will also result in a set of realistic models of signal propagation. Finally, this project will quantify the relative strengths and weaknesses of competing wireless protocols in diverse, realistically emulated physical environments. Project results will be disseminated through publications, through allowing remote researchers emulator access, and through educational activities such as course projects.