Continuous and Wireless Skin Contact and Ear Implant Temperature Measurements and Relations to the Core Body Temperature of Heat Stressed Dairy Cows

Chung, Hanwook; Li, Jingjie; Kim, Younghyun; Choi, Christopher Y.

doi:10.13031/iles.18-059

10th International Livestock Environment Symposium (ILES X) 2018

DOI: 10.13031/iles.18-059

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Continuous and Wireless Skin Contact and Ear Implant Temperature Measurements and Relations to the Core Body Temperature of Heat Stressed Dairy Cows

Hanwook Chung¹,

Jingjie Li²,

Younghyun Kim³

et al.

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A Novel Time-Interval Based Modulation for Large-Scale, Low-Power, Wide-Area-Networks

Sangar

Biradavolu

Krishnaswamy

2022

ACM Trans. Sen. Netw.

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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 1000 WiChronos senders can co-exist with less than 5% collision probability under low traffic conditions.

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A Novel Time-Interval Based Modulation for Large-Scale, Low-Power, Wide-Area-Networks

Sangar

Biradavolu

Krishnaswamy

2022

ACM Trans. Sen. Netw.

View full text Add to dashboard Cite

show abstract

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Continuous and Wireless Skin Contact and Ear Implant Temperature Measurements and Relations to the Core Body Temperature of Heat Stressed Dairy Cows

Cited by 1 publication

References 0 publications

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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