Nortel 2350 参考指南

104 Planning the Nortel WLAN 2300 System

NN47250-102 (320666-G Version 02.01)

The Create RF Obstacle dialog box appears. 

Go to 

.

You can import RF measurements from a site survey file generated by the Ekahau Site Survey Tool. WLAN Manage-
ment Software uses the site survey data to assign attenuation values to objects in the floor plan.

This method of adding RF obstacle data requires the following tools:

•

WLAN Management Software 4.1 or higher

•

Ekahau Site Survey™ Tool (

) and a laptop PC on which to run the tool when you take 

measurements.

•

An “AP on wheels”, a portable AP that you can move to different locations on the floor as you take RF 
measurements with the site survey tool. 

To use this method, perform the following tasks:

In WLAN Management Software, identify the major RF obstacles and assign an attenuation value to 
them. You can select any attenuation value. WLAN Management Software will use the RF measurement 
data from the site survey to correct the attenuation values. (See 

 and 

In WLAN Management Software, indicate the positions where you will place the portable AP. These 
positions are line of sight (LOS) points. You can create the LOS points in WLAN Management Software 
or import them from a comma separated values (CSV) file. In either case, you must assign a unique MAC 
address to each LOS. Even though each LOS will use the same portable AP, each position where you use 
the AP must have a unique MAC address. (See 

.)

You can place the LOS points at the places where you are thinking of installing the permanent APs, but 
this is not a requirement. 

In WLAN Management Software, generate a site survey order. The site survey order includes the 
locations and MAC addresses of the LOS points, and also provides a GIF image of the floor. (See 

.)

In the site survey tool, import the GIF of the floor plan and use the map name specified in the site survey 
work order. 

Note.  Using an object other than a line to represent an RF obstacle’s dimensions 
does not materially affect the calculation of RF attenuation. When WLAN 
Management Software calculates attenuation along any vector passing through 
the obstacle, it counts the obstacle’s RF attenuation only once, regardless of the 
floor space it occupies.

Note.  WLAN Management Software also can create new obstacles based on the 
RF measurement data. But adding major obstacles before you import the survey 
results helps WLAN Management Software provide a more complete set of RF 
obstacles.