Research On Wireless Network Speech Quality Of Service

With the continuous development of mobile communications,network quality improvement,new services are emerging,mobile communications era is gradually transferred from the voice data era,operators worldwide revenue structure of mobile traffic on services revenue accounted for by 2012 upgrade to the current accounting for 15%to 30%.At the same time,OTT(Over The Top)service providers are also fully utilize LTE(Long Term Evolution,Long Term Evolution)network advantages,actively develop various OTT mobile network voice services,to promote the traditional free speech.And voice services as a main source of income once the operator,from 2012,accounting for 70%of the current share dropped to only 35%.For real-time services and human services,the demand is still essential voice,which almost simultaneously three major domestic carriers launched its own VoLTE(Voice Over LTE)business plan,hoping to deal with OTT Internet voice service through VoLTE business impact.In the evaluation of voice quality,the traditional QoS(Quality of Service,based on network quality of service and equipment)can not fully meet the user's perception and experience,so the introduction of the QoE(Quality of Experience,QoE)voice as a wireless network quality evaluation criteria of business.Therefore,how to enhance VoLTE service quality of user experience,improve user satisfaction of Internet users,has become the focus of current research operators.Optimizing the user experience for the quality,how to accurately evaluate the quality of user experience is a must to solve the problem,to solve this problem this paper,the voice quality of the wireless network at the commencement of the study.This paper introduces the features of LTE radio access network,and introduces the VoLTE differences in business processes and business voice voice and OTT services;and later introduced the current popular voice quality evaluation methods,and PESQ(Perceptual Evaluation of Speech Quality perceived voice quality assessment)approach to voice quality objective assessment focuses on;then NS-3 simulation platform VoLTE services and data transmission LTE network OTT voice traffic simulation analysis,crawl VoLTE services and OTT voice service voice files,and these files were subjective and objective voice quality evaluation and comparison;Finally,the PESQ algorithm performance analysis and improvement PESQ proposed calibration models-APESQ for VoLTE business.Performance analysis results show that,compared to the PESQ,APESQ can evaluate the quality of VoLTE services more accurately.