ADS-TEC RAP/RAC1000 User Manual - Manual (Page 205)

IT Infrastructure RAP/RAC1000
© ads-tec GmbH • Raiffeisenstr.14 • 70771 Leinfelden-Echterdingen
205
12.9 E XTENDED R OAMING P ARAMETERS
G ENERAL
Roaming is always required if a Client moves in a large area which cannot be covered by
only one Access Point. Compared to radio links or point-to-point connections mostly having
a fixed channel option, roaming setups require that the Clients are able to find the various
Access Points on the different channels.
Basically, there are two decisive parameters for roaming:
• When
and
• Whereto
First, the Client must know or decide at what time he gives up an existing connection to
look for a better one. Secondly, an additional question arises where to find such a better
Access Point.
As regards the first question, the following parameters are considered and explained under
„Roaming Threshold“:
Connection quality
Period of time
In addition to this „active“ roaming, the Client can also evaluate permanent information
which is already contained in the air of other networks. This is dealt with in the chapter
„Neighbour Roaming“.
The second question „Whereto“ most strongly determines the duration of a connection
failure. If the Client must first rescan all channels, this takes a long time. Therefore, the
Clients offer the possibility of restricting the channel list; see „Restricted Channel List“.
Configuration of the WLAN interface is carried out as usual under
• Configuration  WLAN-1 Parameters
• Configuration  WLAN-1 Security
• Configuration  Adv. WLAN /.
Then the roaming parameters can be specified in more detail, as explained in the following
chapters.