Installation guide

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Wi-Fi Location-Based Services—Design and Deployment Considerations
OL-11612-01
RFID Tag Considerations
Figure 68 Polling Interval
Depending on asset movement, shorter polling intervals may increase the granularity of data collection.
The polling interval value should be set keeping in mind its impact on network traffic between the
location appliance and the controller (see Traffic Between the Location Appliance and WLAN
Controllers, page 81). In any case, the value set for the asset tag polling interval should not be less than
the asset tag beacon rate because the likelihood of unproductive asset tag polling in this case would be
very high.
Recording of asset tag location history is also disabled by default. If location trending and the analysis
of past asset tag location history is desired, location history recording should be enabled via the Location
> History Parameters screen, as shown in Figure 69. Enable the Asset Tags line item and specify the
history archival interval between writes of historical data to the database (default is 720 seconds).
Recording of location history is not mandatory to perform asset tag tracking. It is required only if you
wish to use the location appliance to “playback” the history of locations the asset tag has visited (as
described in 802.11 Active RFID Tags (L2 Multicast), page 31).
Figure 69 Enabling L2 Multicast RFID Tag History
Enable Display of Asset Tags on WCS
For WCS to display the location of asset tags, asset tag display must be explicitly enabled via
Monitor > Maps > Campus > Building > Floor, as shown in Figure 70. Normally, the default
configuration of a newly-installed WCS is to hide the display of asset tags. This is evidenced by the lack
of the display of a yellow tag icon shown under “View Filters”. To enable the display of asset tags, make
sure that Show 802.11 Tags is selected from the dropdown View menu (shown by the red arrow in
300
Polling cycle Polling interval Polling cycle
330 630 660 Seconds
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