Abstract: EDCA in IEEE802.11e can't ensure the QoS of the high priority service flow when there are lots of background traffic in the network. We proposed a novel admission control algorithm based on adaptive, consecutive, variable requests of RTS, which can increase admission probability of high priority service flow, and reduce the collision between the high priority data flow. The theoretical analysis and simulation results show that the algorithm can significantly increase admission probability of high priority service flow, improve the end-to-end throughout, and reduce the retry times and delay, which will ensure the QoS of high priority service flow.

Key words: Wireless mesh networks,Quality of service,Admission control