Understanding QoS issues for 802.11

March 2004
Portable Design;Mar2004, Vol. 10 Issue 3, p18
This article discusses why the 802.11 wireless technology standard must adopt quality of service (QoS) principles. As traffic loads increase on a wireless local area network, high-priority and real time links lose reliability because nodes contend with each other to determine which one will get to transmit. The QoS is essential for enabling the widespread deployment of wireless multimedia applications. Implementing QoS can create issues, but fortunately there are several ways to address those issues that do not require modifications to the 802.11 standards. A simple and extensive approach is to overprovision bandwidth. Another more basic approach is to queue traffic in the host, place all QoS traffic in a high-priority queue, and separate it from low-priority data.


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