Wireless tag reader, wireless tag system, computer readable...

Details Wireless tag reader, wireless tag system, computer readable... Wireless tag reader, wireless tag system, computer readable...

2006-03-17

2008-11-11

Hofsass, Jeff (Department: 2612)

Communications: electrical

Condition responsive indicating system

Specific condition

Reexamination Certificate

active

07450009

ABSTRACT:
There is provided with a wireless tag reader communicating with a plurality of wireless tags each of which retains tag information piece and a bloom filter, the wireless tag reader comprising: a transmitter configured to transmit a read request signal simultaneously to the wireless tags to request the wireless tags to read out the bloom filters; a receiver configured to receive bloom filter signals simultaneously from the wireless tags to acquire a colliding bloom filter signal; a decoder configured to decode the colliding bloom filter signal to acquire a composite bloom filter which is equivalent to logic operation OR on the bloom filters; a data storage configured to store tag information pieces; and a filter verifier configured to verify each of tag information pieces in the data storage with the composite bloom filter to detect tag information pieces for which a verification result is positive or negative.

REFERENCES:
patent: 6456191 (2002-09-01), Federman
patent: 2005/0018668 (2005-01-01), Cheriton
patent: 2005/0237194 (2005-10-01), VoBa
patent: 2006/0044115 (2006-03-01), Doi et al.

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