Table of Contents
Advertisement
8.3.5
Searching for a Single Tag or Group of Tags
There are two ways to search for an individual tag or group of tags using The RRS-
Sensors.
The "select" function configures the RRS-Sensors with set of tag filter criteria and
instructs those tags that match that filter criteria to modify a certain register flag, forcing it
to a known value prior to singulation. The tag protocol operation (i.e. read, write, kill) is
applied only to those tags that meet the filter criteria. When tag populations are relatively
large (> 1000) or when it is critical to apply a tag protocol operation to only a single tag,
this method of filtering is preferred. A good example of an applied use of the "select"
function would be at the point-of-sale (POS) where tags could be deactivated (killed)
prior to exiting a controlled area.
The "post-match" function configures The RRS-Sensors with set of tag filter criteria that
is applied "post" singulation or after a particular tag protocol operation is performed.
Even though the tag still has to compete in the RF environment of the singulation
process, the only data sent to the RFID Gateway is from those tags that match the filter
criteria defined in the "post match" function. "Post Match" filtering is a single step
process, tag memory is not modified and all tags respond to the inventory request.
When tag populations are relatively small (< 1000), this method of filtering on certain tags
is more efficient. A good example of an applied use of the "post match" function would
be when searching a larger tag population with a hand scanner for a particular tag or
group of tags.
August 2018
Revision 0.4
Intel® Responsive Retail Sensor (RRS) Hx Series Sensor
User & Installation Guide
Page: 35
Advertisement
Table of Contents
