Application And Research Of VoLTE And 2/3G Network Convergence

The voice service is basic telecommunications service that mobile operators must provide.With the development of 4G network and the increasing number of mobile users,as well as the rise of mobile Internet,users have put forward higher requirements on voice demand.VoLTE,that is,Voice over LTE.It is a voice service based on IMS network,services are carried on 4G network.VoLTE can unify data and voice services under the same network,it does not need 2G/3G network.Operators will eventually choose VoLTE voice solutions.However,due to the current development status of the IMS network,the replacement speed of the Intelligent user terminals,and the investment benefits of the operators,the IMS network can not directly replace the 2G/3G mobile network.In the process of evolving into VoLTE,there will be long-term coexistence of 2G/3G voice-based services and IMS dominated by multimedia services in the future networks.To ensure users' service quality and application awareness,operators must consider the coexistence of VoLTE and legacy 2G/3G networks.The coexistence of VoLTE and 2G/3G networks arises at the historic moment.During coexistence,how the two networks convergence and communicate with each other;users may reside in the CS domain or may reside in the IMS domain;how does the network know which domain the user is in? How to ensure the continuity of voice calls when users handover from one domain to another.These are all problems to be solved.This paper will study the deployment of VoLTE design and network transformation of the existing network,research and analysis of key technologies to solve the problem of network domain selection,voice interoperability and continuity issues.Ensure the coexistence of VoLTE network and 2G/3G existing network to meet the needs of network convergence.This paper focuses on the technical issues of network convergence and focuses on the analysis and study of related technologies for VoLTE and 2G/3G convergence: Domain Selection,anchoring,and eSRVCC.Solve the problems of network domain selection,voice interoperability and continuity.Ensure the coexistence of VoLTE network and 2G/3G live network to meet the needs of network convergence development.This paper studies the VoLTE and 2G/3G converged networking planning,the deployment of VoLTE and the network reconfiguration of existing networks,and the VoLTE and 2G/3G voice interaction scenarios.According to the objective situation,a more reasonable technical solution was proposed.Provide reference suggestions for the application of converged networks.This paper uses the experimental environment to verify the fusion technology and verify the validity and rationality of the technical analysis.And in-depth study of the problems encountered in the fusion network experiment,proposed solutions and optimization recommendations,and analyze and solve some practical problems.