Location management for radio frequency identification readers

a technology of radio frequency identification and location management, applied in the direction of burglar alarm mechanical actuation, using reradiation, instruments, etc., can solve the problems of reducing the coverage area of the reader, compromising the application of rfid,
US20080284600A1Inactive Publication Date: 2008-11-20RUIZHANG TECH LTD CO
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Patent Information

Authority / Receiving Office
US · United States
Patent Type
Applications(United States)
Current Assignee / Owner
RUIZHANG TECH LTD CO
Publication Date
2008-11-20
Estimated Expiration
Not applicable · inactive patent

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Abstract

A Radio Frequency Identification (RFID) system for managing and identifying locations for an RFID reader is disclosed. An expected location of a fixed radio frequency identification (RFID) reader is determined. A first signal is transmitted from the reader to a first RFID tag to determine whether the reader is at the expected location. The first tag is a fiducial RFID tag fixed at a first location. In one aspect, the reader receives a first response to the first signal from the first tag. The first response identifies the first location of the first tag. The first location is compared to the expected location. If the first location and the expected location are different, an alarm is triggered.
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Description

TECHNICAL FIELD

[0001] This disclosure relates generally it Radio Frequency Identification (RFID) systems, and in particular but not exclusively, relates to location management for RFID readers.BACKGROUND INFORMATION

[0002] Goods and other items may be tracked, and identified using a radio frequency identification (RFID) system. The RFID system includes an RFID tag, which is typically placed on the item to be tracked. The RFID tag is a small transponder that can be read by an RFID reader (also referred to as an RFID interrogator). The reader includes a transceiver and an antenna. The antenna emits electromagnetic (EM) waves generated by the transceiver, which, when received by the tag, activate the tag. Once the tag has been activated, the tag communicates using radio waves back to the reader, thereby identifying the item to which the tag is attached or is otherwise associated with. In one form of RFID, the tag modifies and reflects the waves emitted by the reader, using the modified an...

Claims

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