RTS Threshold
RTS Threshold is a mechanism implemented to prevent the “
Hidden
Node
” problem. “Hidden Node” is a situation in which two stations are
within range of the same Access Point, but are not within range of each
other. Therefore, they are hidden nodes for each other. When a station
starts data transmission with the Access Point, it might not notice that
the other station is already using the wireless medium. When these two
stations send data at the same time, they might collide when arriving
simultaneously at the Access Point. The collision will most certainly
result in a loss of messages for both stations.
Thus, the RTS Threshold mechanism provides a solution to prevent data
collisions. When you enable RTS Threshold on a suspect “hidden
station”, this station and its Access Point will use a Request to Send
(RTS). The station will send an RTS to the Access Point, informing that it
is going to transmit the data. Upon receipt, the Access Point will respond
with a CTS message to all station within its range to notify all other
stations to defer transmission. It will also confirm the requestor station
that the Access Point has reserved it for the time-frame of the requested
transmission.
If the “Hidden Node” problem is an issue, please specify the packet size.
The RTS mechanism will be activated if the data size exceeds the value
you set.
. The default value is
2347
.
Warning:
Enabling RTS Threshold will cause redundant network
overhead that could negatively affect the throughput performance
instead of providing a remedy.
This value should remain at its default setting of
2347
. Should you encounter
inconsistent data flow, only minor modifications of this value are recommended.
Beacon Interval
Beacon Interval is the amount of time between beacon transmissions.
Before a station enters power save mode, the station needs the beacon
interval to know when to wake up to receive the beacon (and learn
whether there are buffered frames at the access point).
DTIM Period
DTIM stands for
Delivery Traffic Indication Message
. A DTIM is a
countdown field informing clients of the next window for listening to
broadcast and multicast messages. When the access point has buffered
broadcast or multicast message for associated clients, it sends the next
DTIM with a DTIM Period value. Access point clients hear and awaken
to receive the broadcast and multicast messages. The default DTIM
period is ‘3’.
Data Rate
By default, the unit adaptively selects the highest possible rate for
transmission. Select the basic rates to be used among the following
options: Auto, 1, 2, 5.5, or 11 Mbps. For most networks the default
setting is
Auto
which is the best choice. When
Auto
is enabled the
transmission rate will select the optimal rate. If obstacles or interference
are present, the system will automatically fall back to a lower rate.
Preamble Type
A preamble is a signal used in wireless environment to synchronize the
transmitting timing including Synchronization and Start frame delimiter.
In a "noisy" network environment, the Preamble Type should be set to
Long Preamble
. The
Short Preamble
is intended for applications
where minimum overhead and maximum performance is desired. If in a
"noisy" network environment, the performance will be decreased.
Broadcast SSID
Select
enabled
to allow all the wireless stations to detect the SSID of
this Access Point.
Tx Power Level
Select the
power level to transmit packets.
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