A dynamic scheme based on load adapation for wireless network MAC protocol

摘要

A solution is urgently expected to meet the higher-quality service requirements of various applications on the limited bandwidth of wireless networks. Based on the ideas of dynamic load adaptation and priority-based service, this paper presents a new analysis model of MAC protocol of wireless communication network with reference to the solutions presented recently to IEEE 802.11 PCF, 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 system. The theoretical model of this protocol is established with Markov chain and probability generating function. Mathematical analysis is made on the mean queue length and the mean inquiry cyclic time of the common queue and the key station. It turns out that the findings from theoretical analysis correspond well with those from simulated experiments.