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Energy and spectrum efficient wireless LAN by tightly integrating low-power wake-up radio

机译：通过紧密集成低功耗唤醒无线电，实现能源和频谱高效的无线局域网

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摘要

CSMA is the de facto standard in wireless LANs (WLANs), where one transceiver is used for both the control and data planes. When many nodes contend to access a same channel, the WLAN transceiver performs carrier sense during most time, which wastes much energy. Dynamic adjustment of parameters (contention window) is suggested in previous works for improving network throughput, but this is also realized at the cost of continuously monitoring the channel with large power consumption. To solve these problems, in this paper, we suggest tightly integrating a lower power wake-up radio (WuR) with the power-hungry WLAN module. Specifically, (i) The WuR is used to monitor the channel and conduct carrier sense. It activates the WLAN module for actual transmissions when the channel gets ready. (ii) The WuR is used to measure the inter-frame space, based on which contention window is adjusted accordingly. Extensive simulation evaluations confirm that the proposed scheme (WuR-CSMA) effectively reduces the duty ratio of WLAN modules and improves system throughput, achieving both energy and spectral efficiency compared with the conventional schemes.
机译：CSMA是无线局域网（WLAN）中的事实上的标准，其中一个收发器用于控制和数据平面。当许多节点争用访问同一信道时，WLAN收发器会在大多数时间内执行载波侦听，这会浪费大量能量。在先前的工作中建议动态调整参数（争用窗口）以提高网络吞吐量，但这也是以持续监视具有大功耗的信道为代价来实现的。为了解决这些问题，在本文中，我们建议将低功耗唤醒无线电（WuR）与耗电的WLAN模块紧密集成。具体而言，（i）WuR用于监视信道并进行载波侦听。当通道准备就绪时，它将激活WLAN模块以进行实际传输。 （ii）WuR被用来测量帧间空间，基于该帧间空间被相应地调整。大量的仿真评估证实，与传统方案相比，该方案（WuR-CSMA）有效降低了WLAN模块的占空比并提高了系统吞吐量，同时实现了能量和频谱效率。

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