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2.7 Redundancy

To protect the suppor ted applications against failures, a certain redundancy must be de-
signed into a wireless network. This means that, if a given access point fails, the stations it
served can join neighbor ing radio cells. However, since access points too close together
generally cause interference, redundancy planning always involves a compromise between
reliability and throughput.
The RF3D User Interface
RF3D WifiPlanner’s user interface has been designed to display even complex WLAN plans
understandably. RF3D WifiPlanner calculates three-dimensional radio characteristics in real
time, and displays them in horizontal cross-sections corresponding to the floors of a build-
ing. A navigation column at the left presents simplified thumbnails of all the floor plans. The
selected floor is displayed in detail in the main window, where you can edit it interactively.
The tabs at the bottom of the window allow you to select the Simulation, Access Points and
Advanced options.

3.1Importing Building Plans

For an exact simulation of floors one above another, the building plans must be aligned. For
this purpose the RF3D WifiPlanner includes an Import Wizard to assist you in importing indi-
vidual floor plans in alignment with one another. Floor plans can be imported in the common
image formats JPG, BMP and PNG. In selecting oor plans, you should choose image les of
moderate size and resolution, since high-definition floor plans consume memory unnecessar-
ily. We recommend that you use images of less than 1000 × 1000 pixels. If your plans are cur-