Two years later, my QoS dream enshrined in 802.11e finally becomes a reality. WLAN quality-of-service specification approved:
The standards board of the full IEEE approved the 802.11e specification for publication in late September, according to Geri Mitchell-Brown, Wi-Fi strategist at SpectraLink, a maker of voice over Wi-Fi systems. The standard is a set of technologies for prioritizing traffic and preventing packet collisions and delays, which should improve the experience of users making VoIP (voice over Internet Protocol) calls and watching video over wireless LANs.
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The 802.11e specification allows packets to gain priority by defining four traffic classes, each with its own queue. By default, they would be for voice, video, best-effort and background, said Ben Guderian, vice president for market strategies and industry relations at SpectraLink. The definitions of the four classes could be changed from the default. To identify the class of each packet, the standard uses markers similar to ones used in wired Ethernet, he added. Seeing those markers, an access point could give voice packets top priority for transmission, followed by video, and so on, he said.