Technical basics
4.7 iPCF / iPCF-HT / iPCF-MC
SCALANCE W780/W740 to IEEE 802.11n Web Based Management
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Configuration Manual, 08/2018, C79000-G8976-C267-13
suitable access points when it receives iPCF queries from the access point and the existing
connection to an access point is working problem-free. This means that if a change to a
different access point is necessary, this is achieved extremely quickly. In contrast to iPCF,
the handover times for iPCF-MC are not dependent on the number of wireless channels
being used.
It is necessary to use an access point with two wireless interfaces a so-called dual access
point. The one interface operates as management channel and sends short frames
(beacons) with administrative information (e.g. channel setting of the data channel and
SSID). The other interface (data channel) exclusively transfers the user data.
The "Legacy Free (iPCF-LF)" setting is available to prevent the performance from being
slowed down by the IEEE 802.11 a/b/g device generation. When enabled, only the devices
that communicate with the IEEE 802.11n standard and have the "Legacy Free (iPCF-LF)"
setting enabled are accepted. WLAN mode IEEE 802.11n need not be enabled for this,
however.
You configure iPCF-MC in "iFeatures > iPCF > iPCF-MC (Page 412)".
The following graphic shows a configuration example for iPCF-MC.