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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-Model VoIP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.
It is very important to correctly evaluate the voice quality of IEEE802.11e wireless LAN in wireless multimedia transmission.A voice quality evaluation model based on IEEE802.11e wireless LAN is proposed.This model introduces E-Model VoIP voice quality evaluation method to estimate the IEEE802.11e wireless local area network The speech quality of the collision is considered, and the new collision probability expression is established with emphasis on the impact of collision loss on speech quality.The speech quality of different collision probabilities under the new model is compared by MATLAB and NS2 simulation results show that the proposed collision probability in the new model Under the voice quality closest to the true value, with the highest assessment accuracy.