Increasing Location Accuracy - Dell PowerConnect W-Airwave User Manual

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NOTE: The remaining sections in this chapter apply to networks, campuses, buildings, and floor plans that have already been set
up in VisualRF. If you do not yet have any of this information in VisualRF for your network, refer to
page 280.

Increasing Location Accuracy

The Location Service will use all RF information available to increase location accuracy of clients, tags, and rogue
devices. Understanding your infrastructure's inherent capabilities helps you learn the extra effort required to
ensure location accuracy.
There are three key elements read from controllers or access points that increase location accuracy: signal strength
of a client as heard by the AP of association, signal strength of a client as heard by APs other than the AP of
association, and signal strength at which an AP hears other APs.
These factors are detailed further in
Table 149 Elements Read From Controllers to Increase Location Accuracy
MFG/Model
Dell PowerConnect
W
Cisco LWAPP
Cisco IOS
Cisco VxWorks
Trapeze
Meru
Proxim
Symbol Auton. AP
Symbol Thin AP
Proxim AP-2000
Proxim AP-4000
ProCurve WeSM
ProCurve 530
ProCurve 420
AMP provides four main methods to increase accuracy once your access points are deployed:
Adding Exterior Walls - increases location accuracy by reducing the statistical probability of placements

outside the office confines. See
Dell PowerConnect W-AirWave | User Guide
Table 149:
Client Signal Associated AP
Yes
Yes
Yes
Yes
Yes
No
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
"Adding Exterior Walls" on
AP-to-AP Signals (Dynamic
Attenuation)
Yes
Yes
No
No
No
No
Yes
No
No
No
Yes
Yes
Yes
Yes
page 270.
"Planning and Provisioning" on
Unassociated Rogue AP
Client Signal Signal
Yes Yes
Yes Yes
No With WLSE
No No
No Yes
No Yes
Yes Yes
No Yes
Yes Yes
Yes Yes
Yes Yes
No Yes
Yes Yes
No Yes
Using VisualRF | 269