Title:
PROTOCOL FOR DISCRIMINATING RADIO-FREQUENCY TAGS IN PLURAL ITEM
Document Type and Number:
Japanese Patent JP3017995
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To identify a tag item in an RF field in a short time by incorporating an antenna for transmitting a radio-frequency signal to and from a base station, and a tag memory, a tag logic and tag algorithm.
SOLUTION: Each of tags for identifying a radio-frequency(RFID) includes a tag antenna 410 for transmitting and receiving a radio-frequency(RF) signals, and is connected to a tag system 450 composed of a tag FR front end 420, a tag logic 430, a tag algorithm 440 and a tag memory 460. With the use of the front end 420, The RF signals powers up the tag logic 430 and the tag algorithm 440. The tag logic includes a status register 43 and the like, and a value on the register 434 indicates that the condition of the tag can be active, identified or data-converting. The algorithm 440 identifies all tags with the use of a novel tree branching technique even through a plurality of tags can transmit signals to and from the base station.
Inventors:
Shun Es Chang
Harley Kent Heinrich
Dipling Dinker Chandler
Arbind Krishna
Harley Kent Heinrich
Dipling Dinker Chandler
Arbind Krishna
Application Number:
JP20879695A
Publication Date:
March 13, 2000
Filing Date:
August 16, 1995
Export Citation:
Assignee:
Intermec IP Corporation
International Classes:
G01S13/75; G01S13/76; G01S13/79; G06K7/00; H04B1/59; (IPC1-7): G01S13/75; G01S13/76; G01S13/79; H04B1/59
Domestic Patent References:
| JP6201821A | ||||
| JP5333145A | ||||
| JP4232488A | ||||
| JP8136648A | ||||
| JP7140236A | ||||
| JP1144884U |
Attorney, Agent or Firm:
Yoshiro Yamamoto