D-Link AirPremier DWL-2210AP Manual page 104

Configuring Queues for Qualty of Service (QoS)
Field
Min. Contention Window
Max. Contention Window
Max. Burst Length
Updating Settings
To apply your changes, click Update Settings.
Description
This parameter is input to the algorithm that determines
the initial random backoff wait time ("window") for retry
of a transmission.
The value specified here in the Minimum Contention
Window is the upper limit (in milliseconds) of a range
from which the initial random backoff wait time is
determined.
The first random number generated will be a number
between 0 and the number specified here.
If the first random backoff wait time expires before the
data frame is sent, a retry counter is incremented and
the random backoff value (window) is doubled.
Doubling will continue until the size of the random
backoff value reaches the number defined in the
Maximum Contention Window.
For more information, see "Random Backoff and
Minimum / Maximum Contention Windows" in this
manual.
The value specified here in the Maximum Contention
Window is the upper limit (in milliseconds) for the
doubling of the random backoff value. This doubling
continues until either the data frame is sent or the
Maximum Contention Window size is reached.
Once the Maximum Contention Window size is reached,
retries will continue until a maximum number of retries
allowed is reached.
For more information, see "Random Backoff and
Minimum / Maximum Contention Windows" in this
manual.
This value specifies (in milliseconds) the Maximum
Burst Length allowed for packet bursts on the wireless
network. A packet burst is a collection of multiple
frames transmitted without header information. The
decreased overhead results in higher throughput and
better performance.
For more information, see "Packet Bursting for Better
Performance" in this manual.
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