Wireless sensor networks for habitat monitoring
WSNA '02 Proceedings of the 1st ACM international workshop on Wireless sensor networks and applications
Inferring Activities from Interactions with Objects
IEEE Pervasive Computing
Energy Scavenging for Mobile and Wireless Electronics
IEEE Pervasive Computing
Telos: enabling ultra-low power wireless research
IPSN '05 Proceedings of the 4th international symposium on Information processing in sensor networks
Perpetual environmentally powered sensor networks
IPSN '05 Proceedings of the 4th international symposium on Information processing in sensor networks
Power management in energy harvesting sensor networks
ACM Transactions on Embedded Computing Systems (TECS) - Special Section LCTES'05
Real-time scheduling for energy harvesting sensor nodes
Real-Time Systems
Eon: a language and runtime system for perpetual systems
Proceedings of the 5th international conference on Embedded networked sensor systems
Design, Modeling, and Capacity Planning for Micro-solar Power Sensor Networks
IPSN '08 Proceedings of the 7th international conference on Information processing in sensor networks
Pacemakers and Implantable Cardiac Defibrillators: Software Radio Attacks and Zero-Power Defenses
SP '08 Proceedings of the 2008 IEEE Symposium on Security and Privacy
An efficient solar energy harvester for wireless sensor nodes
Proceedings of the conference on Design, automation and test in Europe
Proceedings of the 15th ACM conference on Computer and communications security
Recognizing daily activities with RFID-based sensors
Proceedings of the 11th international conference on Ubiquitous computing
Experimental results with two wireless power transfer systems
RWS'09 Proceedings of the 4th international conference on Radio and wireless symposium
Assessing and optimizing the range of UHF RFID to enable real-world pervasive computing applications
PERVASIVE'07 Proceedings of the 5th international conference on Pervasive computing
On the limits of effective hybrid micro-energy harvesting on mobile CRFID sensors
Proceedings of the 8th international conference on Mobile systems, applications, and services
HotPower'08 Proceedings of the 2008 conference on Power aware computing and systems
CCCP: secure remote storage for computational RFIDs
SSYM'09 Proceedings of the 18th conference on USENIX security symposium
Mementos: system support for long-running computation on RFID-scale devices
Proceedings of the sixteenth international conference on Architectural support for programming languages and operating systems
Ekho: bridging the gap between simulation and reality in tiny energy-harvesting sensors
HotPower '11 Proceedings of the 4th Workshop on Power-Aware Computing and Systems
Flit: a bulk transmission protocol for RFID-scale sensors
Proceedings of the 10th international conference on Mobile systems, applications, and services
BLINK: a high throughput link layer for backscatter communication
Proceedings of the 10th international conference on Mobile systems, applications, and services
ACM Transactions on Embedded Computing Systems (TECS) - Special Section on Probabilistic Embedded Computing
QuarkOS: pushing the operating limits of micro-powered sensors
HotOS'13 Proceedings of the 14th USENIX conference on Hot Topics in Operating Systems
Fast tag searching protocol for large-scale RFID systems
IEEE/ACM Transactions on Networking (TON)
Enabling bit-by-bit backscatter communication in severe energy harvesting environments
NSDI'14 Proceedings of the 11th USENIX Conference on Networked Systems Design and Implementation
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Computational RFID (CRFID) tags embed sensing and computation into the physical world. The operation of the tags is limited by the RF energy that can be harvested from a nearby power source. We present a CRFID run-time, Dewdrop, that makes effective use of the harvested energy. Dewdrop treats iterative tasks as a scheduling problem to balance task demands with available energy, both of which vary over time. It adapts the start time of the next task iteration to consistently run well over a range of distances between tags and a power source, for different numbers of tags in the vicinity, and for light and heavy tasks. We have implemented Dewdrop on top of the WISP CRFID tag. Our experiments show that, compared to normal WISP operation, Dewdrop doubles the operating range for heavy tasks and significantly increases the task rate for tags receiving the least energy, all without decreasing the rate in other situations. Using offline testing, we find that Dewdrop runs tasks at better than 90% of the best rate possible.