Foreword1 Scope2 References3 Definitions, symbols and abbreviations4 System procedures4.1 General4.2 Connection, Registration and Mobility Management procedures4.2.1 General4.2.2 Registration Management procedures4.2.3 Service Request procedures4.2.4 UE Configuration Update4.2.5 Reachability procedures4.2.6 AN Release4.2.7 N2 procedures4.2.8 Void4.2.8a UE Capability Match Request procedure4.2.9 Network Slice-Specific Authentication and Authorization procedure4.2.10 N3 data transfer establishment procedure when Control Plane CIoT 5GS Optimisation is enabled4.2.11 Network Slice Admission Control Function (NSACF) procedures4.3 Session Management procedures4.3.1 General4.3.2 PDU Session Establishment4.3.3 PDU Session Modification4.3.4 PDU Session Release4.3.5 Session continuity, service continuity and UP path management4.3.6 Application Function influence on traffic routing4.3.7 CN-initiated selective deactivation of UP connection of an existing PDU Session4.4 SMF and UPF interactions4.5 User Profile management procedures4.6 Security procedures4.7 ME Identity check procedure4.8 RAN-CN interactions4.9 Handover procedures4.9.1 Handover procedures in 3GPP access4.9.2 Handover of a PDU Session procedure between 3GPP and untrusted non-3GPP access4.9.3 Handover of a PDU Session procedure between 3GPP and trusted non-3GPP access4.10 NG-RAN Location reporting procedures4.11 System interworking procedures with EPC4.11.0 General4.11.0a Impacts to EPS Procedures4.11.1 N26 based Interworking Procedures4.11.2 Interworking procedures without N26 interface4.11.3 Handover procedures between EPS and 5GC-N3IWF4.11.3a Handover procedures between EPS and 5GC-TNGF4.11.4 Handover procedures between EPC/ePDG and 5GS4.11.5 Impacts to 5GC Procedures4.11.6 Interworking for common network exposure4.12 Procedures for Untrusted non-3GPP access4.12a Procedures for Trusted non-3GPP access4.12b Procedures for devices that do not support 5GC NAS over WLAN access4.13 Specific services4.13.1 General4.13.2 Application Triggering4.13.3 SMS over NAS procedures4.13.4 Emergency Services4.13.5 Location Services procedures4.13.6 Support of IMS Voice4.13.7 MSISDN-less MO SMS4.13.8 Support of 5G LAN-type service4.14 Support for Dual Connectivity4.15 Network Exposure4.15.1 General4.15.2 External Exposure of Network Capabilities4.15.2a Data Collection from an AF4.15.3 Event Exposure using NEF4.15.4 Core Network Internal Event Exposure4.15.5 Void4.15.6 External Parameter Provisioning4.15.7 Network status reporting4.15.8 Event exposure controlled by a DCCF4.15.9 Time Synchronization exposure4.15.10 AF specific UE ID retrieval4.15.11 Exposure of Events from UPF4.16 Procedures and flows for Policy Framework4.16.1 AM Policy Association Establishment4.16.2 AM Policy Association Modification4.16.3 AM Policy Association Termination4.16.4 SM Policy Association Establishment4.16.5 SM Policy Association Modification4.16.6 SM Policy Association Termination4.16.7 Negotiations for future background data transfer4.16.8 Procedures on interaction between PCF and CHF4.16.9 Update of the subscription information in the PCF4.16.10 Void4.16.11 UE Policy Association Establishment4.16.12 UE Policy Association Modification4.16.13 UE Policy Association Termination4.16.14 Management of access and mobility related policy information depending on the application in use4.17 Network Function Service Framework Procedure4.18 Procedures for Management of PFDs4.19 Network Data Analytics4.20 UE Parameters Update via UDM Control Plane Procedure4.21 Secondary RAT Usage Data Reporting Procedure4.22 ATSSS Procedures4.23 Support of deployments topologies with specific SMF Service Areas4.23.1 General4.23.2 I-SMF selection4.23.3 Registration procedure4.23.3a Deregistration procedure4.23.4 Service Request procedures4.23.5 PDU Session Management procedure4.23.6 I-SMF Related Procedures with PCF4.23.7 Inter NG-RAN node N2 based handover4.23.8 AN Release procedure involving I-SMF4.23.9 Branching Point or UL CL controlled by I-SMF4.23.9a Void4.23.10 CN-initiated selective deactivation of UP connection of an existing PDU Session involving I-SMF4.23.11 Xn based handover4.23.12 N26 based Interworking Procedures with I-SMF4.23.13 Non N26 based Interworking Procedures with I-SMF4.23.14 Pause of charging4.23.15 PDU Session mobility between 3GPP and non-3GPP access4.23.16 Handover of a PDU Session procedure between 3GPP and untrusted non-3GPP access4.23.16a Handover of a PDU Session procedure between 3GPP and trusted non-3GPP access4.23.17 Additional considerations for Home-routed roaming4.24 Procedures for UPF Anchored Data Transport in Control Plane CIoT 5GS Optimisation4.25 Procedures for NEF based Non-IP Data Delivery4.26 Network Function/NF Service Context Transfer Procedures4.27 Procedures for Enhanced Coverage Restriction Control via NEF4.28 Subscription-based distribution of timing information5 Network Function Service procedures5.1 Network Function Service framework procedures5.2 Network Function services5.2.1 General5.2.2 AMF Services5.2.3 UDM Services5.2.4 5G-EIR Services5.2.5 PCF Services5.2.6 NEF Services5.2.6A Void5.2.7 NRF Services5.2.8 SMF Services5.2.9 SMSF Services5.2.10 AUSF Services5.2.11 NWDAF Services5.2.12 UDR Services5.2.13 BSF Services5.2.14 UDSF Services5.2.15 LMF Services5.2.16 NSSF Services5.2.17 CHF Spending Limit Control Service5.2.18 UCMF Services5.2.19 AF Services5.2.20 NSSAAF services5.2.21 NSACF services5.2.22 DCCF Services5.2.23 MFAF Services5.2.24 ADRF Services5.2.25 EASDF Services5.2.26 UPF Services5.2.27 TSCTSF ServicesA.1 GeneralA.2 NamingA.3 Representation in an information flowA.4 Reference to services and service operations in proceduresA.5 Service and service operation description templateA.6 Design Guidelines for NF servicesD.1 Determination of UE presence in Area of Interest by AMFD.2 Determination of UE presence in Area of Interest by NG-RANE.0 OverviewE.1 Delegated SMF discovery in the Home Routed scenarioE.2 Delegated I-SMF discoveryE.3 Delegated PCF discovery in the Roaming scenarioF.1 5GS Bridge information reportingF.2 5GS Bridge configurationF.3 BMCA procedureF.4 5GS interworking with TSN deployed in the transport networkH.1 IntroductionH.2 ProceduresH.2.1 Secondary authentication and authorization by DN-AAA at PDN Connection EstablishmentH.2.1 Secondary authentication and authorization by DN-AAA at PDN Connection Establishment 5.2.15 LMF Services 23.5023GPPProcedures for the 5G System (5GS)Release 18TS Tools: ARFCN - Frequency Conversion for 5G NR/LTE/UMTS/GSM LMF services are defined in clause 8.3 of TS 23.273 [51].