An efficient polling scheme for wireless LANs

With the popularity of WLAN application how to meet the requirements of various applications and perform more efficiently on the limited bandwidth of wireless networks becomes a key problem. This paper suggest a new scheme of MAC protocol of WLAN, making possible the service of the two-class priority station polling system under the mixed policy of exhaustive and gated services, optimizing the services of the system in time of load change input via adjustment of the times of the access gated services, and strengthening the flexibility and fairness of multimedia transmissions in wireless networks. The theoretical model is established with discretetime Markov chain and probability generating function. The analyses demonstrate that this scheme enables an effective allocation of channel resources for different tasks, guarantees the quality of system services.