Research On Network Function Virtualization Of Mobile Core Network

The overall communications users tend to be saturated,operators' voice revenues have decreased,data services have seen explosive growth,but they continue to reduce tariffs,so operators are under tremendous pressure.Therefore,operators need to transform their services and networks.This paper aims at the introduction of core network function virtualization(NFV)technology,plans the telecommunication network globally.From the top layer,it establishes the network's target architecture,evolution path,and plans for implementation.First of all,the dissertation expatiates on the architecture and network element characteristics of the mobile core network.With the continuous evolution of communication networks,a circuit network,an evolved packet core network(EPC),an IP multimedia system(IMS)domain,and a signaling network together form the core network architecture.The core network elements in different networks are Different features.Second,studied the NFV architecture,technical foundation and implementation mechanism.Focusing on the OpenStack cloud management platform,which covers choreography and the full life cycle management of all resources,these are the technical foundations of NFV.Then,for NFV,the use of general-purpose hardware such as servers,storage,and network equipment cannot meet the demand for carrier-grade reliability as existing traditional dedicated telecommunications equipment,and the NFV technology brings certain risks,from the hardware layer reliability of NFV,Virtual Network Function Example(VNF)Reliability Assurance,Pool Group,and Data Center Disaster Recovery A longitudinal study of how to ensure carrier-grade reliability of NFV.Finally,the NFV scheme is introduced into the mobile core network to conduct in-depth analysis.The requirements of NFV,such as cost,technology,scheme,reliability,etc.,are mainly studied,and the NFV-introduced networking scheme and data center scheme are thoroughly analyzed.Combine the characteristics of each core network element and formulate an NFV introduction plan.Analyze the features and application scenarios of the traditional network element and virtual network element independent group Pool and mixed group Pool.Analyze and compare with each other in the same city.Back up the advantages and disadvantages of the data center disaster recovery system in three modes.According to the situation in a certain province,plan the deployment plan for DCs in the critical period of the mobile core network and use the IMS domain as an example to implement the solution.