Registers – Coded record sensors – Particular sensor structure
Reexamination Certificate
2005-12-14
2011-10-04
Hess, Daniel (Department: 2876)
Registers
Coded record sensors
Particular sensor structure
C370S320000, C370S335000
Reexamination Certificate
active
08028910
ABSTRACT:
The present invention relates to a tag anti-collision Radio Frequency Identification (RFID) system and a method for tag identification. The method for tag identification consists of a first step of initializing a queue (Q) field and storing a prefix of a candidate queue (CQ) field in the queue field; a second step of transmitting a query including the prefix stored in the queue field to the RFID tags, and deleting the transmitted prefix from the queue field; a third step of inserting a prefix, in which prefixes 0 and 1 are inserted into a rear portion of a prefix of a previously transmitted query, into the queue field if two or more tags respond to the previously transmitted prefix and, therefore, the tags cannot be identified, and inserting the prefix of the previously transmitted query into the candidate queue field and deleting an unnecessary prefix stored in the candidate queue if there is no response or only one tag responds with respect to the previously transmitted prefix; and a fourth step of determining whether a prefix stored in the queue field exists, and returning to the second step if there is a prefix stored in the queue field.
REFERENCES:
patent: 6859801 (2005-02-01), Law et al.
patent: 2003/0019929 (2003-01-01), Stewart et al.
patent: 2004/0134984 (2004-07-01), Powell et al.
patent: 2000-048136 (2000-02-01), None
patent: 01/57779 (2001-08-01), None
patent: WO 01/57779 (2001-08-01), None
Lee Joo-Mun
Lee Won-Jun
Myung Ji-Hoon
Oh Se-Hyun
Seo Kyung-Ho
Baker & Hostetler LLP
Hess Daniel
Kelly Rafferty
SK Telecom Co. Ltd.
LandOfFree
Tag anti-collision RFID system and method for tag... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Tag anti-collision RFID system and method for tag..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Tag anti-collision RFID system and method for tag... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4264748