Wake-Up Channel Selection for On-Demand WiFi Wake-Up Using WLAN Signals
Wake-Up Channel Selection for On-Demand WiFi Wake-Up Using WLAN Signals
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DOI：
10.1109/vtcspring.2014.7023144
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发表时间：
2014-05
期刊：
影响因子：
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通讯作者：
Takeru Yoshiwaka;H. Yomo;Tetsuya Ito
中科院分区：
文献类型：
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作者：
Takeru Yoshiwaka;H. Yomo;Tetsuya Ito
为了减少WiFi设备浪费的能源消耗，人们提出了无线电点播网络(ROD)，它以按需方式提供无线接入。 ROD 中的每个 WiFi 设备都配备了低功耗唤醒接收器，能够通过包络检测和开关键控 (OOK) 处理来检测通过 WiFi 通道观察到的帧长度。一旦唤醒接收器检测到其他 WiFi 设备发送的唤醒信号中包含的一组预定义长度的 WiFi 帧，它就会打开其主 WiFi 模块。唤醒接收器在 2.4 GHz 频段的所有 WiFi 通道上提取 WiFi 信号。另一方面，试图唤醒其他设备的WiFi设备选择唤醒信道，即发送其唤醒信号的信道。在这种情况下，接收器观察到一个包络，该包络是唤醒信号和所有 WiFi 信道上存在的干扰信号的组合。这里，当多个WiFi信道之间的干扰程度不同时，如何选择唤醒信道是一个关键问题。在本文中，我们在每个信道的干扰程度不同的情况下，评估唤醒信道选择对WiFi设备唤醒成功概率的影响。除了模拟结果之外，我们还展示了通过我们开发的唤醒接收器原型获得的实验结果。
In order to reduce energy wastefully consumed by WiFi device, Radio-On-Demand Networks (ROD) has been proposed, which offers wireless access in an on-demand manner. Each WiFi device in ROD is equipped with a low-power wake-up receiver which is capable of detecting the length of frames observed over WiFi channels through envelope detection and on-off-keying (OOK) processing. Once the wake-up receiver detects the predefined set of length of WiFi frames included in the wake-up signal transmitted by the other WiFi device, it turns its main WiFi module on. The wake-up receiver extracts WiFi signals over all WiFi channels at 2.4 GHz band. On the other hand, a WiFi device, which tries to wake up the other device, selects a wake-up channel, a channel to transmit its wake-up signal. In this case, the receiver observes an envelope which is the combination of the wake-up signal and the interfering signals existing over all WiFi channels. Here, how to select the wake-up channel is a key issue when the degree of interference is different among multiple WiFi channels. In this paper, with different degree of interference in each channel, we evaluate the impact of wake-up channel selection on the wake-up success probability of WiFi device. Besides simulations results, we also present experimental results which are obtained with our developed prototype of wake-up receiver.