As the channel is shared by so many users therefore fairness is one of the most important aspect. A dual queue scheme is proposed in an access point or AP among the flows of the uplink for TCP fairness as well as for down link flows. The problem of unfairness of the flow of TCO is just because of the various responses of the TCP ACK packet drop and data packet drop at the AP.
The latest proposed scheme involves two queues that mean one packet of data for the down link flow of TCP and the other for the up link flows of TCP flows that corresponds the ACK packets. The evaluation of the results of this new scheme is made through simulation and the presented results. In this scheme of dual queue the techniques are very effective and simple for solving the problem of TCP fairness.
The dual scheme helps to implement the send packets and receiving. Both can be done at the same time because two or more queues at the AP are employed. Usually one of the queues is meant for down link of the TCP packets of data while the other for the up link flows of TCP that correspondence the ACK packets. Each queue has its own rate of service and that can be controlled by AP. When the service of MAC is ready you can select each of the queues with varieties of probability.
In order to estimate the probability of the selection we first need to analyze the relationship that exist between the dual queue and the TCP behavior The per flow queue analysis can be applied to the scheme of the dial queue by simply testing the similarities that persist between both the schemes. The packet dripping system is introduced by them which saves efficiency of time in the dual base works.