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Page 4 | How To: Configure the WLAN with QoS alliedtelesis.com
Overview
What is Wi-Fi Multimedia (WMM)
The Wi-Fi Alliance defined WMM as a subset of the IEEE 802.11e standard to
support QoS on wireless networks. WMM offers a mechanism to prioritize traffic
demands from different applications and grants an adequate support to
multimedia applications, thereby reducing the harmful effects caused by high
latency and throughput reductions.
Why use Wi-Fi Multimedia?
Multimedia and data-centric applications typically share the same network
resources, despite their conflicting requirements for data delivery. Without QoS,
the network offers a best-effort service, which means that applications have equal
opportunities to transfer data. WMM enables network managers to prioritize traffic
based on bandwidth requirements, especially delay-sensitive applications such as
Voice over Wireless LAN and streaming multimedia.
QoS policies play a key role when traffic load exceeds the capability of network
resources, or when some applications, like file transfers, consume the available
bandwidth. Based on services classification, WMM individually manages the
traffic classes to provide low latency, reliability, and a more predictable delay to
critical services.