USRobotics Instant802 APSDK - Manual (Page 242)

Professional Access Point
Administrator Guide
Class Structure, Commands, and Examples - 242
Set AIFS on the Client Station
To set the AIFS on station-to-access-point traffic:
set wme-queue wlan0 with queue Queue_Name to aifs AIFS_Value
Where Queue_Name is the queue on the station to which you want the setting to apply and AIFS_Value is
the wait time value you want to specify for AIFS.
For example, this command sets the AIFS wait time on the station Voice queue (vo) to 14 milliseconds.
USR5453-AP# set wme-queue wlan0 with queue vo to aifs 14
View the results of this configuration update (bold in the command output highlights the modified value):
USR5453-AP# get wme-queue
name queue aifs cwmin cwmax txop-limit
--------------------------------------------
wlan0 vo 14 3 7 47
wlan0 vi 2 7 15 94
wlan0 be 3 15 1023 0
wlan0 bk 7 15 1023 0
Setting Minimum and Maximum Contention Windows (cwmin, cwmax)
The Minimum Contention Window (cwmin) sets the upper limit (in milliseconds) of the range from which the
initial random backoff wait time is determined. For more details, see “Random Backoff and Minimum /
Maximum Contention Windows” on page 146 .)
Valid values for the "cwmin" are 1, 3, 7, 15, 31, 63, 127, 255, 511, or 1023. The value for "cwmin" must be
lower than the value for "cwmax".
The Maximum Contention Window (cwmax) sets 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. For more details, see
“Random Backoff and Minimum / Maximum
Contention Windows” on page 146 .)
Valid values for the "cwmax" are 1, 3, 7, 15, 31, 63, 127, 255, 511, or 1023. The value for "cwmax" must be
higher than the value for "cwmin".
Set cwmin and cwmax on the Access Point
To set the Minimum and Maximum Contention Windows (cwmin, cwmax) on access-point-to-station traffic:
set tx-queue wlan0 with queue Queue_Name to cwmin cwmin_Value cwmax cwmax_Value
Where Queue_Name is the queue on the access point to which you want the setting to apply and
cwmin_Value and cwmax_Value are the values (in milliseconds) you want to specify for contention back-off
windows.
For example, this command sets the access point Video queue (data1) cwmin value to 15 and cwmax value
to 31.