Coexistence of Wi-Fi and IoT Communications in WLANs
Coexistence of Wi-Fi and IoT Communications in WLANs
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DOI：
10.1109/jiot.2020.2986110
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发表时间：
2020-08
影响因子：
10.6
通讯作者：
Hossein Pirayesh;Pedram Kheirkhah Sangdeh;Huacheng Zeng
中科院分区：
文献类型：
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作者：
Hossein Pirayesh;Pedram Kheirkhah Sangdeh;Huacheng Zeng
由于大多数物联网（IoT）设备由小型电池供电，并且预计可以在不更换电池的情况下运行多年，因此节能的无线物联网通信已被认为是未来网络基础设施的关键组成部分。在本文中，我们提出了一种实用的设计（称为WiFi-IoT），以在wlan中添加节能的物联网通信能力。WiFi-IoT具有两项创新技术：1)非对称物理（PHY）设计和2)透明共存方案。非对称PHY允许接入点（AP）以极低的采样率（250 ksps）与多个物联网设备通信，从而显着降低物联网设备的功耗。透明共存方案使多天线AP可以同时服务Wi-Fi和IoT设备，从而有效利用频谱。我们在USRP2无线测试平台上构建了WiFi-IoT原型，并评估了其在实际无线环境中的性能。实验结果表明，双天线AP可以在同一频谱上同时服务1台宽带Wi-Fi设备和24台窄带物联网设备。
As most Internet-of-Things (IoT) devices are powered by small-sized batteries and expected to operate for many years without battery replacement, energy-efficient wireless IoT communication has been considered as a crucial component of the future network infrastructure. In this article, we propose a practical design (termed WiFi-IoT) to add energy-efficient IoT communication capability into WLANs. WiFi-IoT features two innovative techniques: 1) an asymmetric physical (PHY) design and 2) a transparent coexistence scheme. The asymmetric PHY allows an access point (AP) to communicate with multiple IoT devices at a much low sampling rate (250 ksps), thereby significantly reducing the power consumption for the IoT devices. The transparent coexistence scheme enables a multiantenna AP to serve Wi-Fi and IoT devices simultaneously, leading to an efficient utilization of spectrum. We have built a prototype of WiFi-IoT on a USRP2 wireless testbed and evaluated its performance in real-world wireless environments. The experimental results show that a two-antenna AP can simultaneously serve one broadband Wi-Fi device and 24 narrowband IoT devices on the same spectrum.