| Stanford, V. “Pervasive Computing Goes the Last Hundred Feet with RFID Systems,” IEEE Pervasive Computing, Vol. 2, 2 (April-June 2003), 9-14 | |
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tags, as RFID technology has come to be known, are low-power, short-range
communication devices that can be deployed in quite different environments
and various contexts. Low-end passive tags have approximately 32 bytes
of local storage and are powered by the RF field generated by the
readers. High-end tags can have full-blown microcontrollers and multiple
interfaces to the environment, with local batteries to power them.
These tags are far more versatile than product bar codes. These tags
can be • Scanned without first establishing the line-of-sight, • Scanned many at a time, • Scanned and captured data far more than what is embedded on the printed bar code, • Scanned and updated, • Interfaced to different sensors and devices. Applications include (given in the article): • Access control: RFID tags embedded into personal ID cards, • Baggage ID: Passive tags embedded in paper luggage tags, • Automotive systems: Keyless entry and immobilization systems, • Document tracking: Passive tags affixed to ducments, • Express-parcel tracking: FedEx tags drivers and packages for various purposes, • Library checkout and check-in: Passive tags in books, • Livestock or pet tracking: Tags injected into pets, aiding recovery when they are lost, • Logistics and supply chain: Container and product tracking, • Wireless commerce: Speedpass and E-ZPass pay tolls and gasoline purchases. |
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