Ultra low power wireless communication for biomedical monitoring: trade-offs and design challenges

2006 ◽  
Author(s):  
A. Burdett
Keyword(s):  
Wireless Communication ◽  
Low Power ◽  
Ultra Low Power ◽  
Biomedical Monitoring ◽  
Trade Offs ◽  
Design Challenges

scholarly journals treNch: Ultra-Low Power Wireless Communication Protocol for IoT and Energy Harvesting

Sensors ◽  
2020 ◽  
Vol 20 (21) ◽  
pp. 6156
Author(s):  
Fernando Moreno-Cruz ◽  
Víctor Toral-López ◽  
Antonio Escobar-Molero ◽  
Víctor U. Ruíz ◽  
Almudena Rivadeneyra ◽  
...  
Keyword(s):  
Energy Harvesting ◽  
Wireless Communication ◽  
Low Power ◽  
Communication Protocol ◽  
Power Level ◽  
Power Input ◽  
Security Level ◽  
Current Standard ◽  
Ultra Low Power ◽  
Wireless Communication Protocol

Although the number of Internet of Things devices increases every year, efforts to decrease hardware energy demands and to improve efficiencies of the energy-harvesting stages have reached an ultra-low power level. However, no current standard of wireless communication protocol (WCP) can fully address those scenarios. Our focus in this paper is to introduce treNch, a novel WCP implementing the cross-layer principle to use the power input for adapting its operation in a dynamic manner that goes from pure best-effort to nearly real time. Together with the energy-management algorithm, it operates with asynchronous transmissions, synchronous and optional receptions, short frame sizes and a light architecture that gives control to the nodes. These features make treNch an optimal option for wireless sensor networks with ultra-low power demands and severe energy fluctuations. We demonstrate through a comparison with different modes of Bluetooth Low Energy (BLE) a decrease of the power consumption in 1 to 2 orders of magnitude for different scenarios at equal quality of service. Moreover, we propose some security optimizations, such as shorter over-the-air counters, to reduce the packet overhead without decreasing the security level. Finally, we discuss other features aside of the energy needs, such as latency, reliability or topology, brought again against BLE.

Design Methodology of Ultra-Low-Power LC-VCOs for IoT Applications

2019 ◽  
Vol 28 (07) ◽  
pp. 1950122 ◽  
Author(s):  
Imen Ghorbel ◽  
Fayrouz Haddad ◽  
Wenceslas Rahajandraibe ◽  
Mourad Loulou
Keyword(s):  
Low Power ◽  
Design Methodology ◽  
Frequency Tuning ◽  
Supply Voltage ◽  
Cmos Process ◽  
Voltage Controlled Oscillator ◽  
Ultra Low Power ◽  
Trade Offs ◽  
Process Measurements ◽  
Lc Vco

A design methodology of CMOS LC voltage-controlled oscillator (VCO) is proposed in this paper. The relation between components and specifications of the LC-VCO is studied to easily identify its design trade-offs. This methodology has been applied to design ultra-low-power LC-VCOs for different frequency bands. An LC-VCO based on the current reuse technique has been realized with the proposed methodology in 0.13[Formula: see text][Formula: see text]m CMOS process. Measurements present an ultra-low power consumption of only 262[Formula: see text][Formula: see text]W drawn from 1[Formula: see text]V supply voltage. The measured frequency tuning range is about 10% between 2.179[Formula: see text]GHz and 2.409[Formula: see text]GHz. The post-layout simulation presents a phase noise (PN) of [Formula: see text][Formula: see text]dBc/Hz, while the measured PN is [Formula: see text][Formula: see text]dBc/Hz.

scholarly journals The Design Challenges of IoT: From System Technologies to Ultra-Low Power Circuits

2017 ◽  
Vol E100.C (6) ◽  
pp. 515-522 ◽  
Author(s):  
Xiaoyan WANG ◽  
Benjamin BÜSZE ◽  
Marianne VANDECASTEELE ◽  
Yao-Hong LIU ◽  
Christian BACHMANN ◽  
...  
Keyword(s):  
Low Power ◽  
Ultra Low Power ◽  
Low Power Circuits ◽  
Power Circuits ◽  
Design Challenges
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