Adding Location Probability Regions - Dell PowerConnect W-Airwave User Manual

To display survey locations, double-click the Display menu widget and select Survey, as shown in
Figure 11 Survey toggle
Note the following information about this procedure:
Ensure the client will remain in the same location for at least the duration of the survey.

You should delete and resurvey an area or a floor plan after a remodel or significant interior movement.

Surveys should be conducted during normal business hours to reflect normal RF activity on the floor.

11a clients automatically inherit the proper transmit power from the 11g configuration. Example: 30mW Pre-

2006 laptops equate to 20mW for 11a clients.
AMP dynamically assigns a transmit power to every client based on OUI as shown in

increases the accuracy for surveys by allowing an override.
Table 10 Auto-assigned Client Type and Transmit Power
Client Type
Pre-2006 Laptops
Post -2006 Laptops
SOHO WLAN Cards (D-Link, Net Gear, LINKSYS)
RFID Tags
PDA
iPhone
Desktop
Cisco Cards

Adding Location Probability Regions

Location probability regions are optional regions that can be used to increase the accuracy of device location in
VisualRF.
VisualRF calculates device locations based on probability. VisualRF determines the probability of a device being
located in every grid cell and places the device where the probability is the highest.
Probability regions will add or remove up to 20% chance from the device location probability. They can be used to
push users into regions where they are more likely to be located, like conference rooms and cubical farms, or they
can be used to pull users out of regions where they are less likely to be like parking lots and courtyards.
To add a probability region to a floor plan, follow these steps:
1. Select the Edit menu and click the Draw Regions icon (red empty squares).
2. Outline the desired probability region. Double click to end the outline process.
3. Name the region, select a Region Type of Location Probability and select OK.
4. Move the location probability slider to the desired level. Very Low will decrease the probability of a device
being placed in that region by 20%. Very High will increase the probability of a device being placed in that
region by 20%.
Dell PowerConnect W AirWave 7.2 | VisualRF User Guide
Transmit Power 11g
30 mW
100 mW
30 mW
10 mW
20 mW
20 mW
100 mW
100 mW
Figure 11:
Table 10. This step
Setting Up and Tuning VisualRF | 21