Ieee 802.11N/Ac - Siemens SIMATIC NET System Manual

● IPCF-MC: IPCF Management Channel
The iPCF-MC function is a further development of iPCF. This mode should be used when
IWLAN nodes that also support iPCF MC are moving freely in the RF field. This method is
particularly suitable when using omnidirectional antennas, when deterministic data needs
to be exchanged. Unlike with iPCF, with iPCF-MC the time for a roaming procedure does
not increase with multiple used WLAN channels.
● iPCF-HT: iPCF High Throughput
The IPCF-HT function must be used for a higher data throughput for iPCF. With this you
can, for example, also transfer video data in addition to PROFINET. Individual data
packets for the same receiver station (client) with the same prioritization are bundled into
a large data packet and transferred via frame bursting (A-MPDU). Prerequisite is an
optimal HF environment such as in a slotted hollow conductor.
● iPRP: industrial Parallel Redundancy Protocol
iPRP ensures high availability of the wireless communication through the setup of
redundant structures.
● iREF: industrial Range Extension Function (only for access points)
iREF ensures that the data traffic from the access point to each individual client is
handled via the most suitable antenna. The access point determines the suitable antenna
on the basis of the RSSI values of received packets.
● AeroScout (only for access points)
The devices support tags of the AeroScout company. Tags are battery-operated RFID
sensors that send their data cyclically as multicast frames. For more detailed information,
refer to the documentation of the AeroScout company (www.aeroscout.com).
● Inter AP blocking (only for access points)
With Inter AP-Blocking the access point restricts the communication of the clients
connected to it.
● PROFINET Transparent mode
Even if NAT is used, you can make individual PROFINET nodes visible again to the
outside. Frames are also forwarded transparently. The exceptions are made by means of
the PROFINET device names.
4.6.5

IEEE 802.11n/ac

Overview
The IEEE 802.11ac standard is a further development of the IEEE 802.11n standard and is
downward compatible with the standards IEEE 802.11a, IEEE 802.11h and IEEE 802.11n.
The mechanisms of the PHY and MAC layer implemented in the IEEE 802.11n standard
have been improved.
Industrial Ethernet
System Manual, 09/2019, C79000-G8976-C242-10
4.6 SCALANCE W components for the Industrial Wireless LAN
SCALANCE network components
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