RFID 101
Most current RFID tags contain 96 bits of information broken down as
follows:
8 bits - Header - EPC tag version
28 bits - EPC Manager - Identifies the manufacturer
24 bits - GTIN - Object Class like a UPC number
36 bits - Serial number references instance information
GTIN information is accessible via a catatlog provider like
(UCCnet)
Serial information (instance) is accessible via the ONS
(Object Name Service)
Generally posted by the manufacturer on their server
accessed via a web address
All other information will be part of the 856 (like it is
currently transmitted
More expensive RFID tags are re-writable (approx $15.00 per)
Most tags will be WORM (write once read many)
Only VANS that provide a catalog service will be used
Happy Holidays
--- In [email protected], rich hurd <[EMAIL PROTECTED]> wrote:
>
> At 04:38 PM 12/22/2004, Earl Wertheimer wrote:
>
> >Hmmm. I thought the tags were write once only.
> >
> >I've never heard of tags being able to be reprogrammed or
receiving new data
> >except when written to by the appropriate writer.
> >
> >Do you have more details?
>
> Some tags have a smallish memory in them, and are r/w. I remember
that
> from a project that I did in earning my undergraduate degree last
year. It
> was a software entrepreneurship class, and the project involved an
> unorthodox use of RFID tags.
>
> We procured an evaluation kit and spent many entertaining hours
playing
> with the tags and determining their capabilities. I will see if I
can dig
> up some details if someone can't help further, but I will have to
unzip
> some files and look around.
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