Foreword1 Scope2 References3 Definitions and abbreviations4 Architecture model and concepts4.1 General concepts4.2 Architecture reference model4.2.1 General4.2.2 Network Functions and entities4.2.3 Non-roaming reference architecture4.2.4 Roaming reference architectures4.2.5 Data Storage architectures4.2.5a Radio Capabilities Signalling optimisation4.2.6 Service-based interfaces4.2.7 Reference points4.2.8 Support of non-3GPP access4.2.9 Network Analytics architecture4.2.10 Architecture Reference Model for ATSSS Support4.2.11 Architecture for 5G multicast-broadcast services4.2.12 Architecture for Proximity based Services (ProSe) in 5GS4.2.13 Architecture enhancements for Edge Computing4.2.14 Architecture for Support of Uncrewed Aerial Systems connectivity, identification and tracking4.2.15 Architecture to support WLAN connection using 5G credentials without 5GS registration4.3 Interworking with EPC4.4 Specific services5 High level features5.1 General5.2 Network Access Control5.3 Registration and Connection Management5.4 3GPP access specific aspects5.5 Non-3GPP access specific aspects5.6 Session Management5.7 QoS model5.8 User Plane Management5.9 Identifiers5.10 Security aspects5.11 Support for Dual Connectivity, Multi-Connectivity5.12 Charging5.13 Support for Edge Computing5.14 Policy Control5.15 Network slicing5.16 Support for specific services5.17 Interworking and Migration5.18 Network Sharing5.19 Control Plane Load Control, Congestion and Overload Control5.20 External Exposure of Network Capability5.20a Data Collection from an AF5.21 Architectural support for virtualized deployments5.22 System Enablers for priority mechanism5.23 Supporting for Asynchronous Type Communication5.24 3GPP PS Data Off5.25 Support of OAM Features5.26 Configuration Transfer Procedure5.27 Enablers for Time Sensitive Communications and Time Synchronization5.28 Support of integration with TSN5.28a Support of integration with TSN Transport Network5.29 Support for 5G LAN-type service5.30 Support for non-public networks5.31 Support for Cellular IoT5.32 Support for ATSSS5.33 Support for Ultra Reliable Low Latency Communication5.34 Support of deployments topologies with specific SMF Service Areas5.35 Support for Integrated access and backhaul (IAB)5.35A Support for Mobile Base Station Relay (MBSR)5.36 RIM Information Transfer5.37 Support for high data rate low latency services5.38 Support for Multi-USIM UE5.39 Remote provisioning of credentials for NSSAA or secondary authentication/authorization5.40 Support of Disaster Roaming with Minimization of Service Interruption5.41 NR RedCap UEs differentiation5.42 Support of Non-seamless WLAN offload5.43 Support for 5G Satellite Backhaul6 Network Functions6.1 General6.2 Network Function Functional description6.3 Principles for Network Function and Network Function Service discovery and selection6.3.1 General6.3.2 SMF discovery and selection6.3.3 User Plane Function Selection6.3.4 AUSF discovery and selection6.3.5 AMF discovery and selection6.3.6 N3IWF selection6.3.7 PCF discovery and selection6.3.8 UDM discovery and selection6.3.9 UDR discovery and selection6.3.10 SMSF discovery and selection6.3.11 CHF discovery and selection6.3.12 Trusted Non-3GPP Access Network selection6.3.12a Access Network selection for devices that do not support 5GC NAS over WLAN6.3.12b Access Network selection for 5G NSWO6.3.13 NWDAF discovery and selection6.3.14 NEF Discovery6.3.15 UCMF Discovery and Selection6.3.16 SCP discovery and selection6.3.17 NSSAAF discovery and selection6.3.18 5G-EIR discovery and selection6.3.19 DCCF discovery and selection6.3.20 ADRF discovery and selection6.3.21 MFAF discovery and selection6.3.22 NSACF discovery and selection6.3.23 EASDF discovery and selection6.3.24 TSCTSF Discovery6.3.25 AF Discovery and Selection6.3.26 NRF discovery and selection7 Network Function Services and descriptions8 Control and User Plane Protocol StacksD.1 IntroductionD.2 Support of Non-Public Network as a network slice of a PLMND.3 Support for access to PLMN services via Stand-alone Non-Public Network and access to Stand-alone Non Public Network services via PLMND.4 Support for UE capable of simultaneously connecting to an SNPN and a PLMND.5 Support for keeping UE in CM-CONNECTED state in overlay network when accessing services via NWuD.6 Support for session/service continuity between SNPN and PLMN when using N3IWFD.7 Guidance for underlay network to support QoS differentiation for User Plane IPsec Child SAE.1 GeneralG.1 GeneralG.2 An SCP based on service meshG.3 An SCP based on independent deployment unitsG.4 An SCP deployment example based on name-based routingH.1 GeneralH.2 Signalling of ingress time for time synchronizationH.3 VoidH.4 Path and Link delay measurementsI.1 Determination of traffic pattern informationK.1 Standardized port and user plane node management informationK.2 Port and user plane node management information exchange for time synchronizationM.1 Mapping of the parameters between 5GS and TSN UNIM.1 Mapping of the parameters between 5GS and TSN UNI H.3 Void 23.5013GPPRelease 18System architecture for the 5G System (5GS)TS Tools: ARFCN - Frequency Conversion for 5G NR/LTE/UMTS/GSM