Brocade Mobility Access Point System Reference Guide (Supporting software release 5.5.0.0 and later) - Manual (Page 465)

Brocade Mobility Access Point System Reference Guide 455
53-1003100-01
6
FIGURE 27 Radio QoS Policy screen - WMM tab
The Radio QoS Policy screen displays the WMM tab by default. Use the WMM tab to define the
access category configuration (CWMin, CWMax, AIFSN and TXOP values) in respect to the type
of wireless data planned for this new or updated radio QoS policy.
4. Set the following Voice Access settings for the radio QoS policy:
Transmit Ops Use the slider to set the maximum duration a device can transmit after obtaining a transmit
opportunity. When resources are shared between a Voice over IP (VoIP) call and a low priority file
transfer, bandwidth is normally exploited by the file transfer, thus reducing call quality or even
causing the call to disconnect. With voice QoS, a VoIP call (a real-time session), receives priority,
maintaining a high level of voice quality. For higher-priority traffic categories (like voice), the
Transmit Ops value should be set to a low number. The default value is 47.
AIFSN Set the current AIFSN value from 1 - 15. Higher-priority traffic voice categories should have lower
AIFSNs than lower-priority traffic categories. This will cause lower-priority traffic to wait longer before
attempting access. The default value is 1.
ECW Min ECW Min is combined with ECW Max to create a contention value in the form of a numerical range.
From this range, a random number is selected for the back off mechanism. Lower values are used
for higher priority traffic. The available range is from 0 - 15. The default value is 2.
ECW Max ECW Max is combined with ECW Min to create a contention value in the form of a numerical range.
From this range, a random number is selected for the back off mechanism. Lower values are used
for higher priority traffic. The available range is from 0 - 15. The default value is 3.