中文摘要：

无线多媒体传输中，正确评估IEEE802．11e无线局域网的语音质量尤为重要．提出一种IEEE802．11e无线局域网的语音质量评价模型．该模型引入E—ModelVoIP语音质量评估方法，估计IEEE802．11e无线局域网的语音质量．重点考虑碰撞丢失对语音质量的影响，建立新的碰撞概率表达式．通过MATLAB、NS2仿真分析比较了不同碰撞概率在新模型下的语音质量．结果表明提出的碰撞概率在新模型下语音质量最接近真实值，具有最高的评估准确度．

英文摘要：

In the wireless multimedia transmission, the correct evaluation of voice quality based on IEEE802.11 eWLANs is particular- ly important. The E-Model evaluation method is commonly used to assess the VoIP voice quality. In this paper, a new model which introduces the E-Model method for assessment of voice quality based on IEEE802.11 eWLANs is proposed. It mainly considers the impact on voice quality by collision loss. This paper presents a new expression of the collision probability. Finally, the voice quality with different collision probability based on this model is compared through MATLAB and NS2 simulation analysis. The results show that the voice quality based on the proposed collision probability is the closest one to the true value of voice quality, and its assessment is accurate.