移动通信网络中的IP电话语音质量的仿真方法  

Simulation Methodology for Speech Quality of VoIP in Mobile Communication Networks

作　　者：张健明[1] 杨大成[1] 

机构地区：[1]北京邮电大学电子工程学院,北京100876

出　　处：《系统仿真学报》2006年第9期2559-2562,共4页Journal of System Simulation

摘　　要：提出了宽带移动通信系统中的IP电话语音质量的仿真方法。整个仿真平台由无线链路仿真、系统级性能仿真和VoIP语音质量仿真三部分组成。文中重点介绍了平台中的VoIP语音质量仿真部分。仿真过程中的分组丢失采用Gilbert模型来模拟,话音的MOS分值用PESQ算法来计算。利用该平台对cdma20001x移动通信系统的IP电话语音质量进行了仿真,给出了分组丢失率、突发性连续分组丢失、用户数等与VoIP语音质量的关系。A simulation framework for VolP speech quality in wideband mobile communication systems was intended to outline, which is composed of wireless link simulation, system performance simulation and speech quality simulation. There has been a focus on packet speech quality simulation. In the proposed simulation, the Gilbert model is used to simulate the packets dropped and PESQ algorithm is for calculating MOS of speech. A simulation example of VoIP in cdma2000 1x networks was camed out. The results demonstrate the relationship between packet loss rate, busty packet loss, terminal number and speech quality.

关 键 词：MOS PESQ VOIP 语音质量 移动通信 分组交换 

分 类 号：TN929.5[电子电信—通信与信息系统]