AT-TQ2403 Management Software User's Guide

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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.