A Sustained QoS Solution by Contention Adaptation in IEEE 802.11e Wireless LANs
The most significant issue in 802.11 contention based networks is to prevent collisions and to ensure connection quality. Researchers have shown an increased interest in collision aware back-off algorithms. However, collision aware back-off algorithms are still failed to ensure strict priority for the high priority traffic. Especially in the heavy loading network, a large number of unsuccessful collisions of low priority traffic are the leading cause of the performance degradation of high priority traffic. The authors' scheme aims to share the transmission channel efficiently and to provide the strict priority contention scheme. Their approach is derived from the Enhanced Distributed Channel Access (EDCA) induced in the IEEE 802.11e standard.