Programmable Radio Environments for Smart Spaces
Programmable Radio Environments for Smart Spaces
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DOI：
10.1145/3152434.3152456
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发表时间：
2017-11
期刊：
影响因子：
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通讯作者：
Allen Welkie;Longfei Shangguan;Jeremy Gummeson;Wenjun Hu;K. Jamieson
中科院分区：
文献类型：
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作者：
Allen Welkie;Longfei Shangguan;Jeremy Gummeson;Wenjun Hu;K. Jamieson
智能家居和智能办公室等智能空间是使用联网传感器实现建筑自动化的常见物联网(IoT)场景。在这篇文章中，我们提出了一种不同的智能空间概念，其中无线电环境是可编程的，以在空间内实现理想的链路质量。我们设想部署嵌入在建筑物墙壁中的低成本设备，以被动反射或主动传输无线电信号。这与优化终端无线电和单个链路以提高性能的典型方法大相径庭。与以前对抗或利用每条链路的多径衰落的工作不同，我们主动地重新配置了多径传播。我们概述了这种可编程无线电环境的设计和实施方向，强调了我们的体系结构面临的计算和操作挑战。初步实验证明，使用无源元件改变无线信道、通过9个Wi-Fi副载波移频“零”、将2 x 2 MIMO信道条件数改变1.5分贝、以及衰减或增强高达26分贝的信号强度是有效的。
Smart spaces, such as smart homes and smart offices, are common Internet of Things (IoT) scenarios for building automation with networked sensors. In this paper, we suggest a different notion of smart spaces, where the radio environment is programmable to achieve desirable link quality within the space. We envision deploying low-cost devices embedded in the walls of a building to passively reflect or actively transmit radio signals. This is a significant departure from typical approaches to optimizing endpoint radios and individual links to improve performance. In contrast to previous work combating or leveraging per-link multipath fading, we actively reconfigure the multipath propagation. We sketch design and implementation directions for such a programmable radio environment, highlighting the computational and operational challenges our architecture faces. Preliminary experiments demonstrate the efficacy of using passive elements to change the wireless channel, shifting frequency "nulls" by nine Wi-Fi subcarriers, changing the 2 x 2 MIMO channel condition number by 1.5 dB, and attenuating or enhancing signal strength by up to 26 dB.