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Adaptive cleaning for rfid data streams
, 2006
"... ABSTRACT To compensate for the inherent unreliability of RFID data streams, most RFID middleware systems employ a "smoothing filter", a sliding-window aggregate that interpolates for lost readings. In this paper, we propose SMURF, the first declarative, adaptive smoothing filter for RFID ..."
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Cited by 101 (0 self)
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ABSTRACT To compensate for the inherent unreliability of RFID data streams, most RFID middleware systems employ a "smoothing filter", a sliding-window aggregate that interpolates for lost readings. In this paper, we propose SMURF, the first declarative, adaptive smoothing filter for RFID data cleaning. SMURF models the unreliability of RFID readings by viewing RFID streams as a statistical sample of tags in the physical world, and exploits techniques grounded in sampling theory to drive its cleaning processes. Through the use of tools such as binomial sampling and π-estimators, SMURF continuously adapts the smoothing window size in a principled manner to provide accurate RFID data to applications.
Performance benchmarks for passive UHF RFID tags
- In Proceedings of the 13th GI/ITG Conference on Measurement, Modeling, and Evaluation of Computer and Communication Systems
, 2006
"... Abstract. This paper describes the first comprehensive benchmark suite for passive UHF RFID tags. These benchmarks give good indications as to how well RFID products will work in “real world ” scenarios. We present benchmarks and give some experimental results, as well as key insights that these ben ..."
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Cited by 24 (2 self)
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Abstract. This paper describes the first comprehensive benchmark suite for passive UHF RFID tags. These benchmarks give good indications as to how well RFID products will work in “real world ” scenarios. We present benchmarks and give some experimental results, as well as key insights that these benchmarks have revealed about the nature of current UHF RFID tags on the market. 1
Reducing false negative reads in RFID data streams using an adaptive sliding-window approach
- Sensors 2012, 12, 4187–4212. 2012
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Performance Benchmarks for Passive UHF RFID Tags by
, 2005
"... Passive radio frequency identification (RFID) systems are revolutionizing the way products and goods are tracked and traced in the supply chain. Various major retailers and government agencies have realized the potential of RFID systems and have released mandates and recommendations to their supplie ..."
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Passive radio frequency identification (RFID) systems are revolutionizing the way products and goods are tracked and traced in the supply chain. Various major retailers and government agencies have realized the potential of RFID systems and have released mandates and recommendations to their suppliers. The time constraints to meet the mandates and the lack of good, reliable, unbiased source of information has driven the need for developing a set of common benchmarks for comparing performance of tags. In this thesis, I present a comprehensive set of benchmarks developed for comparing the performance of Ultra High Frequency (UHF) passive RFID tags. Also, I present some experimental results and the key insights that these benchmarks have revealed about the current state of passive UHF RFID tags that are available in the commercial market. iii To my parents iv Acknowledgements
A System to Test the Performance of RFID-Tagged Objects
"... A system is described which has been developed to assess how well RFID-tagged products can be read with various positionings of the tag on the product face. The system can search the entire product surface and provide a measure of tag performance in any location, allowing also for variation in the p ..."
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A system is described which has been developed to assess how well RFID-tagged products can be read with various positionings of the tag on the product face. The system can search the entire product surface and provide a measure of tag performance in any location, allowing also for variation in the position of the reader antenna. Simulation of moving products is also possible. Results are shown. 1. Background RFID tags show great promise for the supply chain, but even newer generations show sharp variations in performance [7]. To implement the technology reliably, its performance must be predictable. Work has been undertaken to test tag performance directly [7], and also to test products with attached tags. One approach to testing tagged products is to simulate a supply chain and send the products through it [3], comparing different tags in different positions on the item to find an optimal location. This technique is effective but time-consuming. In this paper we describe a system developed to automate this process. Automation brings advantages of both speed and accuracy, as well as great flexibility in configuration changes to the testing environment. 2. Overview The system consists of two Fanuc M6i industrial robot arms which hold the RFID reader antenna and the product under test. The tag is supported on a radio-neutral stand made of wood and PVC piping. With this arrangement any relative position of tag, reader, and product can be simulated. By disregarding the product, the system can also be used to survey the range and other performance characteristics of RFID antennas and readers. The robots and reader are controlled by a custom VisualBasic program, which uses an ActiveX control to directly supply positional data to the robots during testing.
