NFC-WISP: A sensing and computationally enhanced near-field RFID platform

Zhao, Yi; Smith, Joshua R.; Sample, Alanson P.

doi:10.1109/rfid.2015.7113089

Cited by 48 publications

(19 citation statements)

References 12 publications

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“…Many battery-less EH platforms have been proposed. Some of them rely on dedicated external energy sources such as WISP -and its variants-, a general wireless sensing and identification platform [34,41,42]; WISPcam, an RF-powered camera [27] and, the battery-free cellphone [35]. Others, harvest from ambient sources such as the ambient backscatter tag [21], and the solar-powered tag [25].…”

Section: Energy-harvesting Systemsmentioning

confidence: 99%

Continuous Sensing on Intermittent Power

Majid

Schilder

Langendoen

2020

2020 19th ACM/IEEE International Conference on Information Processing in Sensor Networks (IPSN)

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The main obstacles to achieve truly ubiquitous sensing are (i) the limitations of battery technology-batteries are short-lived, hazardous, bulky, and costly-and (ii) the unpredictability of ambient power. The latter causes sensors to operate intermittently, violating the availability requirements of many real-world applications. In this paper, we present the Coalesced Intermittent Sensor (CIS), an intermittently-powered "sensor" that senses continuously! Although a single node will frequently be off charging, a group of nodes can-in principle-sense 24/7 provided that their awake times are spread apart. As communication is too expensive, we rely on inherent component variations that induce small differences in power cycles. This basic assumption has been verified through measurements of different nodes and power sources. However, desynchronizing nodes is not enough. An important finding is that a CIS designed for certain (minimal) energy conditions will become synchronized when the available energy exceeds the design point. Nodes employing a sleep mode (to extend their availability) do wake up collectively at some event, process it, and return to charging as the remaining energy is typically too low to handle another event. This results in multiple responses (bad) and missing subsequent events (worse) due to the synchronized charging. To counter this undesired behavior we designed an algorithm to estimate the number of active neighbors and respond proportionally to an event. We show that when intermittent nodes randomize their responses to events, in favorable energy conditions, the CIS reduces the duplicated captured events by 50% and increases the percentage of capturing entire bursts above 85%. CCS CONCEPTS • Human-centered computing → Empirical studies in ubiquitous and mobile computing.

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Section: Energy-harvesting Systemsmentioning

confidence: 99%

Continuous Sensing on Intermittent Power

Majid

Schilder

Langendoen

2020

2020 19th ACM/IEEE International Conference on Information Processing in Sensor Networks (IPSN)

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“…One pioneering work is the NFC-WISP platform [ 29 ]. In this case, rectification is done externally using a full-wave rectifier with discrete diodes, and the ISO-14443 protocol is completely implemented in a low-power microcontroller (TI MSP430).…”

Section: Nfc Sensorsmentioning

confidence: 99%

“…These chips collect part of the energy received by the magnetic field generated at the reader to provide an analog voltage output that can be used to power external electronics such as low-power microcontrollers or sensors. The progressive introduction of these ICs into the market enables the development of low-cost batteryless portable sensors [ 29 , 30 ].…”

Section: Introductionmentioning

confidence: 99%

A Survey of NFC Sensors Based on Energy Harvesting for IoT Applications

Lázaro

Villarino

Girbau

2018

Sensors

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In this article, an overview of recent advances in the field of battery-less near-field communication (NFC) sensors is provided, along with a brief comparison of other short-range radio-frequency identification (RFID) technologies. After reviewing power transfer using NFC, recommendations are made for the practical design of NFC-based tags and NFC readers. A list of commercial NFC integrated circuits with energy-harvesting capabilities is also provided. Finally, a survey of the state of the art in NFC-based sensors is presented, which demonstrates that a wide range of sensors (both chemical and physical) can be used with this technology. Particular interest arose in wearable sensors and cold-chain traceability applications. The availability of low-cost devices and the incorporation of NFC readers into most current mobile phones make NFC technology key to the development of green Internet of Things (IoT) applications.

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“…There are several energy harvesting battery-less platforms. For instance, computational RFIDs include open-source TI MSP430-based [69] WISP [51] (with its variants such as WISPCam [50], NFC-WISP [77] or NeuralWISP [30]), Moo [76], and commercial ones such as Medusa [17]. Other platforms include ambient backscatter tag [39,44,52] or batteryless phone [65].…”

Section: Intermittent Computing: Background 21 Energy Harvesting Sysmentioning

confidence: 99%

Untitled

2019

ACM Trans. Sen. Netw.

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Energy-neutral Internet of Things requires freeing embedded devices from batteries and powering them from ambient energy. Ambient energy is, however, unpredictable and can only power a device intermittently. Therefore, the paradigm of intermittent execution is to save the program state into non-volatile memory frequently to preserve the execution progress. In task-based intermittent programming, the state is saved at task transition. Tasks are fixed at compile time and agnostic to energy conditions. Thus, the state may be saved either more often than necessary or not often enough for the program to progress and terminate. To address these challenges, we propose Coala, an adaptive and efficient task-based execution model. Coala progresses on a multi-task scale when energy permits and preserves the computation progress on a sub-task scale if necessary. Coala's specialized memory virtualization mechanism ensures that power failures do not leave the program state in non-volatile memory inconsistent. Our evaluation on a real energy-harvesting platform not only shows that Coala reduces runtime by up to 54% as compared to a state-of-the-art system, but also it is able to progress where static systems fail. CCS Concepts: • Hardware → Power and energy; • Software and its engineering → Embedded software; Virtual memory;

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NFC-WISP: A sensing and computationally enhanced near-field RFID platform

Cited by 48 publications

References 12 publications

Continuous Sensing on Intermittent Power

Continuous Sensing on Intermittent Power

A Survey of NFC Sensors Based on Energy Harvesting for IoT Applications

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