ADS-TEC RAP/RAC1000 User Manual - Manual (Page 207)

IT Infrastructure RAP/RAC1000
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Determination of the threshold:
The threshold should be chosen slightly below the lowest threshold value measured
between all Access Points. It must never be higher than the signal strength measured
directly at the Access Points. The signal strengths, shown in the figure below, are rather
(45 and 38 dB) in the areas A and B. In the overlapping area AB, the signal strength is
20dB; therefore the threshold chosen should be 20dB so that the Client roams at lower
signal strengths.
Setting of parameters:
It is recommended to keep the packet number fixed (e.g. 15) and first to adjust the
threshold (in the example: 15); then the packet number can be decreased if the dwell time
is too long, or be increased in case of excessive roaming. If the roaming triggers are
activated, the following messages are displayed in the Client’s Event Log:
Causes of error:
An excessively high number of roaming messages within an excessively short time in the
Client’s Event Log suggest that the chosen threshold is too high or the chosen packet
number is too low.
Compared to that, an excessively high dwell time at the Access Points suggests that the
threshold is too low or the packet number is too high.