LANCOM L
-
300 Access Point series
Chapter 5: Advanced wireless LAN configuration
59
EN
The MCS selection therefore indicates the type and minimum or maximum
number of modulation parameters that should be used for one or two
spatial data streams. Within these limits, the appropriate MCS is selected
when the connection is established depending on the current conditions
and may be adapted during the connection if required. This also defines
the maximum attainable data throughput, indicated in the last column of
the table (here for the short guard interval GI = 0.4 μs using the 40 MHz
channel).
Short guard interval
This option is used to reduce the transmission pause between two signals
from 0.8 μs (default) to 0.4 μs (short guard interval). This increases the
effective time available for data transmission and thus the data through-
put. However, the wireless LAN system becomes more liable to disruption
that can be caused by interference between two consecutive signals.
The short guard interval is activated in automatic mode provided the
remote station supports this operating mode. Alternatively the short
guard mode can be switched off.
Frame aggregation
Frame aggregation is used to combine several data packets (frames) into
one large packet and transmit them together. This method serves to
reduce the packet overhead, and the data throughput increases.
Frame aggregation is not particularly suited to time critical data transmis-
sion such as voice over IP.
5.2.4
Configuring 802.11n parameters
You can find 802.11n parameter configuration for the wireless LAN module in
LANconfig under
Wireless LAN
General
Physical WLAN Settings
Radio
.
