Concurrent Low-power Listening: A New Design Paradigm for Duty-cycling Communication
Concurrent Low-power Listening: A New Design Paradigm for Duty-cycling Communication
复制标题
并发低功耗监听：占空比通信的新设计范式
DOI：
10.1145/3517013
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发表时间：
2023-02-01
影响因子：
4.1
通讯作者：
Zeng, Fanzi
中科院分区：
文献类型：
--
作者：
Liu, Daibo;Cao, Zhichao;Zeng, Fanzi
在这篇文章中，我们探讨了一种新的设计范式的占空比机制，支持低功耗设备，充分把信道竞争的传输机会。为了实现这一目标，我们提出了并发低功耗监听（CLPL），使竞争容忍和并发媒体访问控制（MAC）广泛部署的低功耗设备。CLPL的基本原理是，即使存在同频干扰和噪声，调频接收机也能可靠地解调最强的信号。通过使用CLPL，发送器在相邻的数据帧之间插入一系列定制的信号（即唤醒信号）来唤醒指定的接收器，使其能够接收下一个数据帧。CLPL根据系统定义的最大发射功率电平，采用自适应算法调整唤醒信号的发射功率，使其信号强度高于接收机灵敏度，并且不会干扰传输中的其他数据帧。通过利用时空相关性，我们进一步开发了一种轻量级的唤醒信号检测方法，使等待发送者能够准确地识别当前的信道条件。然后，它通过与那些唤醒信号重叠来调度发送方的数据帧传输，而不与现有的数据帧传输冲突。我们已经实现了CLPL的原型，并进行了广泛的实验上的真实的测试床。与ContikiMAC、A-MAC、BoX-MAC和机会型ORW等低功耗MAC协议相比，CLPL协议的吞吐量提高了2-6倍，端到端传输延迟降低了一半。
In this article, we explore a newdesign paradigm of duty-cycling mechanism that supports low-power devices to fully turn channel contention into transmission opportunities. To achieve this goal, we propose Concurrent Low-power Listening (CLPL) to enable contention-tolerant and concurrent media access control (MAC) for widely deployed low-power devices. The fundamental principle behind CLPL is that frequency modulated receiver can reliably demodulate the strongest signal even if cochannel interference and noise exist. By using CLPL, a sender inserts a series of tailor-made signals (namely, wake-up signal) between adjacent data frames to awaken appointed receiver, making it capable to receive the next data frame. According to system-defined maximum transmission power level, CLPL adopts an adaptive algorithm to adjust the transmission power of wake-up signals so that its signal strength is above receiver sensitivity and will not interfere with the other data frames in transit. By exploiting the spatial-temporal correlation, we further develop a light-weight wake-up signal detection method to enable a waiting sender to accurately identify the current channel condition. Then, it schedules the sender's data frame transmissions by overlapping with those wake-up signals, without conflicting with existing data frame transmissions. We have implemented the prototype of CLPL and conducted extensive experiments on a real testbed. In comparison with the state-of-the-art low-power MAC schemes, such as ContikiMAC, A-MAC, BoX-MAC, and opportunistic scheme ORW, CLPL can improve the throughput by 2-6 times and halve the end-to-end transmission delay.