Design And Implementation Of Mobile Converged Network For Training And Experiment

In recent years,with the rapid development of communication technology and information industry,intelligent terminals have been integrated into all aspects of social life,and wireless mobile communication has become one of the most important means of co mmunication.Since the early 1980 s,wireless mobile communication has been in operation.To meet the growing demand for mobile data services and improve the user experience,wireless mobile communication has evolved through the analog technology-based 1G communication system,the2 G communication system using digital voice technology and the 3G communications system with the rapid development of data service.C urrently the 4G communication system has been commercial used on a large scale,and nationals and standard organizations are also actively promoting the 5G standard development and experimental testing.In the current network of operators,there are many kinds of network coexist ing,which determines that the mobile network of operators is a complex and non-single network.However,out laboratory only has a complete the 2G GSM and CDMA network and the 3G core Network experimental environment,far behind the existing commercial network.Therefore,both from the personnel training and the perspective of research,it's required to build a mobile converged network for training and experimental environment.O ur research focused on how to satisfy the personnel training,business development and project research and development needs,and how to smoothly evolved to a Evolved Packet Core(EPC)converged network with the existing 2G and 3G network environment,and how to interconnect with each network under the control of IP Multimedia Subsystem(IMS)network.In this paper,we study the design and implementation of the mobile converged network for training and experiment.Firstly,we introduce two important network architecture EPC and IMS.Secondly,based on the existing mainstream telecom operators' evolution strategy and the voice scheme,we study the 2G/3G/4G converged network architecture design after introducing IMS.Finally,based on the environment of the laboratory,it is decided to adopt 2G/3G/4G converged network,and Voice over LTE(VoLTE)and does not consider the SRVCC/e SRVCC network design.According to the existing environment of the laboratory,the building of VoLTE is solved from three aspects: Firstly,to realize the coexistence of VoLTE and CSFB business,we use the same SIM card to combine two different numbers in different domains,so it's more convenient and quick to display different voice scenarios and also achieve the reuse of mobile phones;Secondly,considering that our laboratory does not have the SBC,and is atypical in IMS network scenarios.We use the function of user inter-visiting of ZTE P-GW's APN to achieve the mutual visiting between the same APN users,realizing the media through technology between VoLTE terminals;thirdly,because of the absence of e SRVCC function,we research VoLTE domain selection technolo gy according to different numbers to predict which domain the user belongs,based on the first aspect that a single SIM card stores different mobile phone numbers of IMS domain and CS domain.