Dynamic TXOP Allocation Method in WLAN

In order to solve the fairness problem in 802.11e networks,a method called DTAF(Dynamic TXOP Allocation for Fairness) is proposed,which utilizes the collision times to estimate contention degree before transmission,turns TXOP,and at the same time,solves the unfairness problem in the networks employing the multi-rate scheme.Theoretic analysis and simulaiton results show that DTAF has better performance in retransmission times,packets average transmission delay and fairness among stations employing varying data rates.