Specifications

BPG_11n_v1.0 | Page 23

To begin the fingerprinting process floor plans are imported in the LM application. These

floor plans are then divided into “locales”. In the screenshot below each green and blue

section corresponds with a unique locale.

Fingerprinting is accomplished by the following steps:

(a) Associate the fingerprinting client to the network

(b) Start a continuous ping from that client to some other device on the network

(d) Move the client to a “locale”

(e) Be sure that the fingerprinting communicating to the LM

(f) As the client is transmitting data to the LM, rotate the client 360 degrees.

This process is repeated for all locales. While this process is happening all of the APs that can

hear the client at each locale are reporting back to the LM. Allocate enough time to do

fingerprinting. It general takes approximately 1 min / locale.

One considerable difference between general network designs and designs specifically

optimized for locationing is the density of APs seen in each location.

While the general guideline is for 2 – 3 APs be seen by a client, for locationing the

recommendation is that the range be increased to 5 - 7 APs. This allows for greater

locationing precision. An additional recommendation, that is a divergence from the general

APs placement guidelines, is that APs be installed in non-uniform AP pattern to support LM.

That is to say that the APs should be placed in an irregular pattern, both horizontally and

vertically in a multi floor deployment. This will guarantee unique fingerprints for each locale.

Please note the Location Manager requires a dedicated SA1000 as the application is very

processor intensive.

MERU BEST PRACTICES GUIDE | 11n Design, Implementation and Optimization