22
40MHz
is the channel spectrum with the width of 40MHz (selected by default).
Reverse Direct Grant:
this option can increase the wireless throughput.
TX Power:
please refer to the description on the page.
Rx Power:
please refer to the description on the page.
Preamble Length:
this option is to define the length of the sync field in an 802.11 packet.
Most modern wireless network uses shot preamble with 56 bit sync filed instead of long
preamble with 128 bit sync filed. However, some original 11b wireless network devices only
support long preamble.
RTS Threshold:
determines the packet size of a transmission and, through the use of an
access point, helps control traffic flow. The range is 0-2347 bytes. The default value is 2347,
which means that RTS is disabled.
RTS/CTS
(Request to Send / Clear to send) are the mechanism used by the 802.11
wireless networking protocols to reduce frame collisions introduced by the hidden
terminal problem. RTS/CTS packet size threshold is 0-2347 bytes. If the packet size the
node wants to transmit is larger than the threshold, the RTS/CTS handshake gets
triggered. If the packet size is equal to or less than threshold the data frame gets sent
immediately.
System uses Request to Send/Clear to send frames for the handshake that provide
collision reduction for an access point with hidden stations. The stations are sending a
RTS frame first while data is sent only after a handshake with an AP is completed.
Stations respond with the CTS frame to the RTS, which provide clear media for the
requesting station to send the data. CTS collision control management has a time
interval defined during which all the other stations hold off the transmission and wait
until the requesting station will finish transmission.
Fragment Threshold:
specifies the maximum size for a packet before data is fragmented
into multiple packets. The range is 256-2346 bytes. Setting the Fragment Threshold too low
may result in poor network performance. The use of fragment can increase the reliability of
frame transmissions. Because of sending smaller frames, collisions are much less likely to
occur. However, lower values of the Fragment Threshold will result in lower throughput as
well. Minor or no modifications of the Fragmentation Threshold value is recommended
while default setting of 2346 is optimum in most of the wireless network use cases.
Beacon Period:
By default, it is set to 100ms. Higher Beacon interval will improve the
device’s wireless performance and is also power-saving for client side. If this value set
lower than 100ms, it will speed up the wireless client connection.
5.3 NAT/Routing
Click the plus sign beside
NAT/Routing
menu to open us all the parameters contained, see
below:
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