g核心网和关键技术和功能介绍

© Nokia 2018For internal use5G核心网关键技术和功能介绍2© Nokia 2018目录1.5G核心网架构和各主要NF功能描述2.5G核心网关键技术介绍-基于服务的构架SBA-控制面和用户面分离CUPS-计算与存储分离-网络切片构架和选择NSSF 3.注册管理和连接管理RM/CM-用户标识-不同的注册管理流程和功能-几种不同的连接管理状态分析4.会话管理SM-PDU会话的一些特性介绍-会话和业务连续性模式介绍-基于流的QoS模型介绍-边缘计算和本地路由功能5.5G的关键呼叫流程-注册流程-PDU会话建立流程-切换流程© Nokia 2018For internal use1. 5G核心网架构和各主要NF功能描述4© Nokia 20185G Service Based Architecture (SBA)AUSFUE(R)ANUPFN2N3N1N9AMFN4AFPDNN6N4PCFSMFUDMUSER PLANECONTROL PLANELocal PDNUPFN1N2UEAPN3IWFN3NEF3rd party appl.DSFNRFService based interfaces (APIs) “on demand”Authenti-ficationAccess &Mobility MgmtUnified data mgmt5G Core (SBA)Service Based ArchitectureApplicationFunctionSessionMgmtData StorageFunctionUser PlaneFunctionPolicy CtrlFunctionNetwork repositoryFunctionNetwork Exposure functionAMF: Access and Mobility management FunctionSMF: Session Management FunctionUPF: User Plane FunctionUDSF: Unstructured Data Storage Function AUSF: Authentication Server Function UDM: Unified Data ManagementUDR: Unified Data RepositoryN3IWF: Non-3GPP Interworking FunctionNRF: Network Repository FunctionNEF: Network Exposure FunctionNSSF: Network Slice Selection FunctionPCF: Policy Control Function5© Nokia 2018Access and Mobility Management function (AMF)•Mandatory functionality•Termination of RAN control interface (N2)•Termination of NAS (N1), NAS ciphering and integrity protection•Access authentication and authorization•Security anchor function and security context mgmt for access security key handling •Registration, connection, reachability, and mobility management•Session mgmt message transport and proxy between UE and Session Management Function (SMF)•SMS transport between UE and SMSF•Lawful interception•Optional functionality•Support of mandatory functionality for non-3GPP access•N3IWF N2 interface termination and NAS signaling5G System ArchitectureAMFSMFPCFEIRAUSFUEN1N2N3InternetUPF4G/5GN4IMSN3IWFNSSFN5SMSFNRFUDSFUDRNEFAFUDMn3GPPAll network functions can interact with NRF, UDSF, UDM, UDR, and NEF as necessaryBGWHSSTASIMSN6MRFLMF6© Nokia 2018Session Management function (SMF)•Session establishment, modify and release inc N3 tunnel•UE IP address allocation & management•Selection and control of UP function (UPF)•UPF traffic steering configuration to proper destination•Termination of interfaces towards Policy control functions•Control part of policy enforcement and QoS•Charging data collection and support of charging interfaces•Control and coordination of charging data collection at UPF•Termination of SM parts of NAS messages•Downlink Data Notification•Initiator of AN specific SM information via AMF over N2•Determine SSC mode of a session•Lawful intercept•Roaming functionality (local QoS, charging, LI)5G System ArchitectureAMFSMFPCFEIRAUSFUEN1N2N3InternetUPF4G/5GN4IMSN3IWFNSSFN5SMSFNRFUDSFUDRNEFAFUDMn3GPPAll network functions can interact with NRF,...