76343/4/5 | English, Revision 05 | Date: 23.02.2022
71
Wireless (WLAN Interface) – Chapter 7
7.5.1.1 AP Density
The SNR threshold value is set by the parameter
AP Density
. The following values are
pre-/defined:
7.5.1.2 Channels for Roaming
Especially if the WLAN infrastructure only works in the 2.4 GHz range, it makes sense
to define the channels on which the APs are working here. This allows the roaming
function of the HG G
76343/4/5 to optimize scanning.
For WLAN infrastructures in the 5GHz range, it only makes sense to specify the chan
-
nels if only
Non-DFS channels
are used (36, 40, 44, 48).
7.5.1.3 Min scan interval
This parameter is used to specify the time interval in seconds at which the
HG G
76343/4/5 performs scans if the SNR value of the existing connection is
be
-
low
the SNR threshold. 3 seconds is the default value here.
7.5.1.4 Max scan interval
This parameter is used to specify the time interval in seconds at which the
HG G
76343/4/5 performs scans if the SNR value of the existing connection is
above
the SNR threshold. 60 seconds is the default value here.
7.5.1.5 AP Scoring
The decision with which AP the HG G
76343/4/5 establishes a connection is based
on an evaluation (scoring) that takes various parameters into account. The parame
-
ters that are available also depend on the existing WLAN infrastructure.
The most important value is the signal strength (SNR). Starting from the SNR value,
it can also be taken into account:
Utilization of the canal
current transmitting power of the AP's
In addition, statistics are kept on each AP with which a connection has already been
established. At the same time, failed attempts are also registered, whereby failed at
-
tempts reduce the score. With this parameter you can switch off the evaluation of
the additional parameters and only have the evaluation carried out on the basis of
the SNR.
Table 47
Wireless (WLAN Interface): AP Density
AP Density
SNR
Behavior
autodetect
(default)
variable
With this setting, an algorithm is activated which varies the SNR
threshold according to the found conditions.
This setting should be used in most cases.
high
35
Depending on how
tight
the APs are mounted in the operating range
of the HG G
76343/4/5, a specific threshold value can be set here.
medium
30
low
25
static client
20
If the radio modem is installed at a fixed location, the threshold can be
set relatively low, thus avoiding unnecessary scan operations.
no roaming
0
If scanning is to be minimized or if there is only one suitable AP near
the HG G
76343/4/5, the SNR value can also be set to
0
with this.
custom roaming
Para.
This allows the SNR value to be specified individually.
