Communication and Distance Measurement in an Addresses Wide Band Rfid System
First Claim
1. In a radio frequency identification system of elements including at least one reader and a plurality of tags, including a first tag and a second tag, a method for communicating between the at least one reader and the tags, the method comprising the steps of:
- (a) addressing a wide-band-message signal by including in said signal a first-tag identifier of the first tag, thereby producing an addressed wide-band-message signal with a destination being the first tag;
(b) transmitting said addressed wide-band-message signal by the reader;
(c) waiting to receive by the first tag said addressed wide-band-message signal; and
(d) upon receiving said addressed wide-band message signal and recognizing said identifier, responding to said addressed wide-band-message signal by transmitting by the first tag an addressed wide-band response signal.
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Accused Products
Abstract
A method for communicating between elements including a reader and tags of a radio frequency identification system. The method includes addressing a wide-band-message signal by including in the signal an identifier of the first tag. The addressed wide-band-message signal is transmitted by the reader. A first tag waits to receive the addressed wide-band-message signal; and upon receiving the addressed wide-band-message signal and recognizing the identifier, the first tag responds to the addressed wide-band-message signal by transmitting an addressed wide-band response signal either back to the reader or to a relaying tag. The tag relays to another element of the system by transferring at least one datum of the query from the addressed wide-band-message signal to the addressed wide-band response signal, where the elements are readers or tags. The system and method allow for many parallel wide band addressed links, and for position determination using at least two tags with known locations.
71 Citations
27 Claims
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1. In a radio frequency identification system of elements including at least one reader and a plurality of tags, including a first tag and a second tag, a method for communicating between the at least one reader and the tags, the method comprising the steps of:
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(a) addressing a wide-band-message signal by including in said signal a first-tag identifier of the first tag, thereby producing an addressed wide-band-message signal with a destination being the first tag; (b) transmitting said addressed wide-band-message signal by the reader; (c) waiting to receive by the first tag said addressed wide-band-message signal; and (d) upon receiving said addressed wide-band message signal and recognizing said identifier, responding to said addressed wide-band-message signal by transmitting by the first tag an addressed wide-band response signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. In a radio frequency identification system of elements including at least one reader and a plurality of tags, wherein at least one of said elements includes a wide-band wireless transceiver comprising:
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(i) an addressing mechanism which addresses a wide-band message signal by including in said message signal an identifier of at least one element of the system, and thereby produces an addressed wide-band message signal, and (j) a transmitter which transmits said addressed wide-band message signal. - View Dependent Claims (18, 19, 20, 21, 22, 23)
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24. In a radio frequency identification system of elements including at least one reader and a plurality of tags, a method for communicating between the elements using wide-band signals, the method comprising the step of:
(a) relaying at least one query from at least one querying element to at least one relaying element by transferring at least one datum of said at least one query from said at least one querying element to said at least one relaying element, wherein said at least one query is carried in a single cell using said wide-band signals without interfering with each other. - View Dependent Claims (25, 26, 27)
Specification