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128 AT-TQ2403 - Management Software - User's Guide
Field Description
AIFS
(Inter-Frame Space)
The Arbitration Inter-Frame Spacing (AIFS) specifies a wait time (in
milliseconds) for data frames.
Valid values for AIFS are 1 through 255.
For more information, see “EDCA Control of Data Frames and
Arbitration Interframe Spaces
”.
cwMin
(Minimum Contention
Window)
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.
Valid values for the "cwmin" are 1, 3, 7, 15, 31, 63, 127, 255, 511, or
1023.
For more information, see “Random Backoff and Minimum / Maximum
Contention Windows”.
cwMax
(Maximum Contention
Window)
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.
Valid values for the "cwmax" are 1, 3, 7, 15, 31, 63, 127, 255, 511, or
1023.
For more information, see “Random Backoff and Minimum / Maximum
Contention Windows”.