User's Manual

Chapter 6 | Wireless Settings
Wi-Fi Multimedia (WMM)
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The following items are displayed on this page:
◆ WMM — Sets the WMM operational mode on the access point. When enabled,
the parameters for each AC queue will be employed on the access point and
QoS capabilities are advertised to WMM-enabled clients. (Default: Disabled)
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Disable: WMM is disabled.
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Enable: WMM must be supported on any device trying to associated with
the access point. Devices that do not support this feature will not be
allowed to associate with the access point.
◆ WMM Acknowledge Policy — By default, all wireless data transmissions
require the sender to wait for an acknowledgement from the receiver. WMM
allows the acknowledgement wait time to be turned off for each Access
Category (AC) 0-3. Although this increases data throughput, it can also result in
a high number of errors when traffic levels are heavy. (Default: Acknowledge)
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Aknowledge — Applies the WMM policy.
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No Aknowledge — Ignores the WMM policy.
◆ WMM BSS Parameters — These parameters apply to the wireless clients.
◆ WMM AP Parameters — These parameters apply to the access point.
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logCWMin (Minimum Contention Window): 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
CWMin value. Specify the CWMin value in the range 0-15 microseconds.
Note that the CWMin value must be equal or less than the CWMax value.
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logCWMax (Maximum Contention Window): 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 CWMax value. Specify the CWMax value in the range 0-15
microseconds. Note that the CWMax value must be greater or equal to the
CWMin value.
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AIFSN (Arbitration Inter-Frame Space): The minimum amount of wait time
before the next data transmission attempt. Specify the AIFS value in the
range 0-15 microseconds.
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TXOP Limit (Transmit Opportunity Limit): 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. Specify a value in the range 0-65535 microseconds.