With the scale coverage of the LTE network and the enrichment of the terminal industry chain supporting VOLTE, China Telecom VOLTE business trial business plan is gradually advancing. VoLTE G Voice Over LTE, LTE - based voice communications, And its core network completely abandoned the circuit domain (CS), A unique grouping domain (PS), All the data, The voice service is all in the subgroup domain "solve ". Than G traditional 2 or 3 communications G, VoLTE can not only complete high-quality multimedia sessions, And can provide similar voice call management services and multimedia sessions for flexible and reasonable billing. It will become the preferred voice call service for mobile users in the future. However, VoLTE is an open network architecture, Using a full IP network based on SIP protocols, All voice calls go through packet domains rather than circuit domains, And that makes VoLTE face a lot of security problems, In particular, there are two types of security issues: one is the security of identity authentication between the end user and the business network, The other is the security of voice data between users.
VOLTE service, as a voice service carrying in the 4 G network, provides high quality audio and video calls, which also puts forward higher requirements for the quality of the IP carrying network and the cooperation and compatibility of the This paper summarizes and analyzes the typical cases of VOLTE network in Yanfeng District of Hengnan County in internal experience test and network pulling test for your reference and study in order to further improve the maintenance quality of Yanfeng District VOLTE network in Hengnan County and explore a new maintenance model.
Keywords :4 G communication; data analysis; VOLTE;SIP; delay