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AT-TQ2403 Management Software User's Guide 121
Chapter 19: Configuring Quality of Service
(QoS)
Quality of Service (QoS) provides you with the ability to specify parameters on multiple queues for
increased throughput and better performance of differentiated wireless traffic like Voice-over-IP (VoIP),
other types of audio, video, and streaming media as well as traditional IP data over the AT-TQ2403
Management Software.
The following sections describe how to configure Quality of Service queues on the AT-TQ2403
Management Software:
Understanding QoS
QoS and Load Balancing
802.11e and WMM Standards Support
QoS Queues and Parameters to Coordinate Traffic Flow
802.1q and DSCP tags
Navigating to QoS Settings
Configuring QoS Queues
Configuring AP EDCA Parameters
Enabling/Disabling Wi-Fi Multimedia
Configuring Station EDCA Parameters
Updating Settings
Understanding QoS
A primary factor that affects QoS is network congestion due to an increased number of clients
attempting to access the air waves and higher traffic volume competing for bandwidth during a busy time
of day. The most noticeable degradation in service on a busy, overloaded network will be evident in
time-sensitive applications like Video, Voice-over-IP (VoIP), and streaming media.
Unlike typical data files which are less affected by variability in QoS, Video, VoIP and streaming media
must be sent in a specific order at a consistent rate and with minimum delay between Packet
transmissions.
If the quality of service is compromised, the audio or video will be distorted.
QoS and Load Balancing
By using a combination of load balancing (see “Load Balancing”) and QoS techniques, you can provide a
high quality of service for time-sensitive applications even on a busy network. Load balancing is a way of
better distributing the traffic volume across access points. QoS is a means of allocating bandwidth and
network access based on transmission priorities for different types of wireless traffic within a single
access point.