Performing Advanced Configuration
SYSTIMAX® AirSPEED™ AP542
User Guide
79
QoS
Wireless Multimedia Extensions (WMM)/Quality of Service (QoS)
The AP supports Wi-Fi Multimedia which defines an intermediate solution for QoS functionality until the IEEE 802.11e
specification is formally approved. WMM is based on a subset of the 802.11e standard, and defines enhancements to
the MAC for wireless LAN applications with Quality of Service requirements, which include transport of voice traffic
over IEEE 802.11 wireless LANs.
The enhancements are in the form of changes in protocol frame formats (addition of new fields and information
elements), addition of new messages, definition of new protocol actions, channel access mechanisms (differentiated
control of access to medium) and network elements (QoS/WMM aware APs, STAs), and configuration management.
WMM supports Enhanced Distributed Channel Access (EDCA) for prioritized QoS services. The WMM/QoS feature
can be enabled or disabled per wireless interface.
QoS Policies
Perform the following procedure to enable QoS and add QoS policies:
1. Click
Configure > QoS > Policy
.
Figure 4-26 QoS Policies
2. To enable QoS, check the
Enable Quality of Service
checkbox.
3. Configure the
QoS Maximum Medium Threshold
for all Admission Controls. Admission will be granted if the new
requested traffic stream and already admitted time is less than the
medium maximum threshold
.
4. To add or edit a QoS Policy, scroll down to the “QoS Policies Table” box and click the
Add
or
Edit
button. The
Add
Entries
or
Edit Entries
screen appears. See
Figure 4-27
.
