A Novel Time-Interval Based Modulation for Large-Scale, Low-Power, Wide-Area-Networks
A Novel Time-Interval Based Modulation for Large-Scale, Low-Power, Wide-Area-Networks
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DOI：
10.1145/3549543
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发表时间：
2022-07
影响因子：
4.1
通讯作者：
Yaman Sangar;Yoganand Biradavolu;Bhuvana Krishnaswamy
中科院分区：
文献类型：
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作者：
Yaman Sangar;Yoganand Biradavolu;Bhuvana Krishnaswamy
长距离无线通信已成为电池供电的大规模部署的瓶颈。Zigbee和蓝牙低功耗等低功耗协议的通信范围有限，而蜂窝和卫星网络等长距离通信策略则非常耗电。LoRa、SigFox和NB-IoT等使用窄带通信的技术频谱效率较低，导致可扩展性问题。这项工作的目标是开发一个通信框架，是节能，远程和可扩展的。我们提出，设计和原型WiChronos，一个通信范例，编码信息在两个窄带符号之间的时间间隔，以大大减少能源消耗在广域网中的大量的带宽。我们利用这些应用的低数据速率和宽松的延迟要求来实现上述所需的功能。我们设计并实现了线性调频扩频发射机和接收机，使用现成的组件来发送窄带符号。基于我们的原型，WiChronos与最先进的LPWAN技术相比，在超过4公里的实验验证距离下传输小于10字节的有效载荷时，电池寿命提高了60%。我们还表明，在低流量条件下，超过1,000个WiChronos可以共存，碰撞概率小于5%。
Wireless communication over long distances has become the bottleneck for battery-powered, large-scale deployments. Low-power protocols like Zigbee and Bluetooth Low Energy have limited communication range, whereas long-range communication strategies like cellular and satellite networks are power-hungry. Technologies that use narrow-band communication like LoRa, SigFox, and NB-IoT have low spectral efficiency, leading to scalability issues. The goal of this work is to develop a communication framework that is energy efficient, long-range, and scalable. We propose, design, and prototype WiChronos, a communication paradigm that encodes information in the time interval between two narrowband symbols to drastically reduce the energy consumption in a wide area network with large number of senders. We leverage the low data-rate and relaxed latency requirements of such applications to achieve the desired features identified above. We design and implement chirp spread spectrum transmitter and receiver using off-the-shelf components to send the narrowband symbols. Based on our prototype, WiChronos achieves an impressive 60% improvement in battery life compared to state-of-the-art LPWAN technologies in transmission of payloads less than 10 bytes at experimentally verified distances of over 4 km. We also show that more than 1,000 WiChronos senders can co-exist with less than 5% collision probability under low traffic conditions.