The QoS support for multimedia on wireless network is one of the most important researches in recent years. IEEE wireless 802.1le is the most hopeful among these methods. However, the performance metrics used in 802.1le experiments are almost network-level measures. They represent the network state and not the perceptual quality of the end user. Besides, wireless network is error prone and errors are unavoidable. In this paper, we evaluate the effect of Random error Model and Gillbert-Elliot(GE) error model on the quality of multimedia applications.
Multimedia communications over the Internet have undergone considerable growth in recent years thanks to various mature technologies. However, the wellknown wireless standard IEEE 802.11 cannot provide adequate bandwidth and jitter for multimedia communications. In this paper, a dual-mode access scheme with QoS features is proposed to solve the asymmetric link problem resulting from the 802.11 distributed coordination function. The proposed scheme not only improves throughput fairness, but also takes care of the provision of QoS support. The results of simulations show the benefits of the proposed scheme.
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