Research On Improving The Quality Of VoLTE Call Based On Customer Perception

With the development of mobile Internet,free OTT applications has also been developed rapidly in recent years,which has a strong impact on the traditional voice services of fixed-line operators.With the 4G generation officially arriving in 2014,Now the Vo LTE technology has been gradually mature,bringing better using feeling and user experience and its calling delay significantly reduced because of high-definition voice and coder and decoder of video improving the quality of voice calls twice,as a consequence,VoLTE will be the inevitable trend of the development of LTE voice.In the state of Vo LTE vigorous development,whether the operator's network coverage can meet the requirements,and the voice quality based on user perception can be maintained well just is the focus of this thesis.This thesis introduces the development status of mobile Internet,the dilemma of traditional voice business and the development trend of VoLTE;demonstrates,from the side,the inevitability of the development of VoLTE by briefly descripting the architecture of Vo LTE network and the current strengths and weaknesses;Secondly,the thesis introduces the principle of relevant key technologies;at the same time combined with the problems encountered in the actual work process in the southern province of China Mobile,carries out in-depth research and Analysis to improve the speech quality of VoLTE;analyzes deeply and optimally the interference within the network,apple terminal SRVCC does not switch,the problem of cell edge poor quality,weak field call success rate is low,through the test,background optimization and result verificating;discusses about the SRVCC optimization scheme based on quality and the Vo LTE access strategy based on satisfaction rate.Nowdays,during the era of rapidly developing Vo LTE,how to quickly and effectively improve the quality of VoLTE calls,to provide customers with a smooth,high definition of the call environment,is one of the core objectives of the operator.This thesis focuses on the research of speech quality under different scenarios,through the ways of the test,project discussion,optimization background,results confirmed,verifying this research has remarkable improvement on the indexes including packet loss rate,delay and loss rate,has great improvement on the VoLTE voice quality,has a significant role in promoting,at the same time,brings more economic and social value for operators.