ADS-TEC RAP/RAC1000 User Manual - Manual (Page 202)

IT Infrastructure RAP/RAC1000
202
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12.8 E
XTENDED
B
ACKGROUND
S
CANNING
G ENERAL
The aim of Extended Background Scanning is to realise the roaming process without losing
time during scanning. For this purpose two WLAN interfaces are needed. Therefore, only
the RAC112 is suited because it is the only Client that has two WLAN interfaces. These two
interfaces are configured identically. While one interface is for data communication, as
known of the normal WLAN, the second interface permanently scans and provides this new
information to the first interface. Due to this information and the threshold for Neighbour
Roaming, the first interface can evaluate new Access Points and, if required, roam to them.
In doing so, there is not time needed for scanning because the channel and the address of
the better Access Point are known.
The configuration of the Extended Background Scanning Client differs only slightly from the
configuration of a normal WLAN Client. The configuration of the Access Points does not
differ from the configuration of other Access Points and will therefore not be explained
here.
C ONFIGURATION
Activating the Extended Background Scanning Mode
To configure the RAC112 for the Extended Background Scanning Mode, the operation
mode has to be changed to Extended Background Scanning under „Configuration  IP
Configuration“.
Note:
Once the RAC112 is operated in the Extended Background Scanning mode, the
configuration pages for the second WLAN interface will be inactive.
Note:
Neighbour Roaming is activated for the two WLAN interfaces; this will also be maintained
after deactivation of the Extended Background Scanning Mode.