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Chapter 30
| WMM Commands
AP - Access Point
BSS - Wireless client
ac_number - Access categories (ACs) – voice, video, best effort, and
background. These categories correspond to traffic priority levels and are
mapped to IEEE 802.1D priority tags as shown in
(Range: 0-3)
LogCwMin - Minimum log value of the contention window. This is the initial
upper limit of the random backoff wait time before wireless medium access
can be attempted. The initial wait time is a random value between zero and
the LogCwMin value. Specify the LogCwMin value. Note that the LogCwMin
value must be equal or less than the LogCwMax value. (Range: 1-
15 microseconds)
LogCwMax - Maximum log value of the contention window. This is the
maximum upper limit of the random backoff wait time before wireless
medium access can be attempted. The contention window is doubled after
each detected collision up to the LogCwMax value. Note that the CWMax
value must be greater or equal to the LogCwMin value. (Range: 1-
15 microseconds)
AIFS - Arbitrary InterFrame Space specifies the minimum amount of wait
time before the next data transmission attempt. (Range: 1-
15 microseconds)
TXOPLimit - Transmission Opportunity Limit specifies the maximum time
an AC transmit queue has access to the wireless medium. When an AC
queue is granted a transmit opportunity, it can transmit data for a time up
to the TxOpLimit. This data bursting greatly improves the efficiency for high
data-rate traffic. (Range: 0-65535 microseconds)
admission_control - The admission control mode for the access category.
When enabled, clients are blocked from using the access category.
(Options: 0 to disable, 1 to enable)
Default
Table 27: AP Parameters
WMM Parame-
AC0 (Best Effort)
ters
LogCwMin
4
LogCwMax
10
AIFS
3
TXOP Limit
0
Admission Control Disabled
AC1 (Back-
ground)
4
10
7
0
Disabled
– 260 –
Table 2 on page
AC2 (Video)
AC3 (Voice)
3
2
4
3
2
2
94
47
Disabled
Disabled
87.
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