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these two stations send data at the same time, they might collide when arriving simultaneously at the Public
Access Point. The collision will most certainly result in a loss of messages for both stations. Thus, the RTS
Threshold mechanism will provide the solution to prevent data collisions. When the RTS is activated, the station
and its Public Access Point will use a Request to Send/Clear to Send protocol (RTS/CTS). The station will send an
RTS to the Public Access Point, informing that it is going to transmit the data. Upon receipt, the Public 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 to the requesting station that the Public Access Point has reserved the channel for
transmission.
Fragmentation Threshold:
Fragmentation mechanism is used for improving the efficiency when there is high
traffic within the wireless network. If you transmit large files in a wireless network, you can enable the
Fragmentation Threshold and specify the packet size.
Beacon Interval:
The amount of time between beacons in kilo microseconds.
DTIM:
This setting, always a multiple of the beacon period, determines how often the beacon contains a delivery
traffic indication message (DTIM). A traffic indication map is present in every beacon. The DTIM notifies
power-save client devices that a packet is waiting for them. If power save clients are active, the access point
buffers any multicast traffics and delivers them immediately after the DTIM beacon. Power save nodes always
wake for the DTIM beacons. The longer the time, the more buffering the access point.
Preamble:
The radio preamble is a section of data at the head of a packet that contains information the access
point and the client devices need when sending and receiving packets. Keep the setting on
short
unless you want
to test with long preambles. If you have the radio preamble set to short and a client associates that does not
support short preamble associates, the access point will send only long preamble packets to this client.
•
Short
- A short preamble improves throughput performance.
•
Long
- A long preamble ensures compatibility between the access point and all early Wireless LAN
Adapters
•
Auto
– Including Short and Long preamble.
Enable Protection Mode:
Selecting Protection Mode to reduce conflict with 802.11b AP, and also lower
throughput.
