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TS 23.501 (SA2)
System Architecture for the 5G System

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V16.1.0 (Wzip)2019/06  368 p.
V15.6.0 (PDF)2019/06  … p.


Service-based representation of the 5G Core architecture
5G-EIR (5G-Equipment Identity Register) – AF (Application Function) – AMF (Access and Mobility Management Function) – AUSF (Authentication Server Function) – CHF (Charging Function) – DN (Data Network) – NF (Network Function) – NEF (Network Exposure Function) – NRF (Network Repository Function) – NSSF (Network Slice Selection Function) – NWDAF (Network Data Analytics Function) – PCF (Policy Control Function) – (R)AN ((Radio) Access Network) – SCP (Service Communication Proxy) – SMF (Session Management Function) – SMSF (Short Message Service Function) – UDM (Unified Data Management) – UDSF (Unstructured Data Storage Function) – UPF (User Plane Function) – UDR (Unified Data Repository) –


Rapporteur:  Ms. Chandramouli, Devaki

The present document defines the Stage 2 system architecture for the 5G System. The 5G System provides data connectivity and services. This specification covers both roaming and non-roaming scenarios in all aspects, including interworking between 5GS and EPS, mobility within 5GS, policy control and charging, and authentication. TS 23.502 contains the stage 2 procedures and flows for 5G System and it is a companion specification to this specification.

short Table of Contents for  TS 23.501  Word version:   16.1.0

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1  Scope [R15]Word-p. 16
2  References [R15]Word-p. 16
3  Definitions and abbreviations [R15]Word-p. 20
4  Architecture model and concepts [R15]Word-p. 26
4.1  General conceptsWord-p. 26
4.2  Architecture reference modelWord-p. 27
4.3  Interworking with EPCWord-p. 52
4.4  Specific servicesWord-p. 63
5  High level features [R15]Word-p. 68
5.1  GeneralWord-p. 68
5.2  Network Access ControlWord-p. 68
5.3  Registration and Connection ManagementWord-p. 70
5.4  3GPP access specific aspectsWord-p. 83
5.5  Non-3GPP access specific aspectsUpWord-p. 93
5.6  Session ManagementWord-p. 96
5.7  QoS modelWord-p. 122
5.8  User Plane ManagementWord-p. 139
5.9  IdentifiersWord-p. 163
5.10  Security aspectsWord-p. 166
5.11  Support for Dual Connectivity, Multi-ConnectivityWord-p. 168
5.12  ChargingWord-p. 169
5.13  Support for Edge ComputingWord-p. 170
5.14  Policy ControlWord-p. 171
5.15  Network slicingWord-p. 171
5.16  Support for specific servicesWord-p. 188
5.17  Interworking and MigrationWord-p. 200
5.18  Network SharingWord-p. 213
5.19  Control Plane Load Control, Congestion and Overload ControlWord-p. 216
5.20  External Exposure of Network CapabilityWord-p. 223
5.20a  Data Collection from an AF [R16]Word-p. 224
5.21  Architectural support for virtualized deploymentsWord-p. 224
5.22  System Enablers for priority mechanismWord-p. 232
5.23  Supporting for Asynchronous Type CommunicationUpWord-p. 234
5.24  3GPP PS Data OffWord-p. 235
5.25  Support of OAM FeaturesWord-p. 235
5.26  Configuration Transfer ProcedureWord-p. 236
5.27  Time Sensitive Communications [R16]Word-p. 238
5.28  Support of integration with TSN [R16]Word-p. 241
5.29  Support for 5G LAN-type service [R16]Word-p. 244
5.30  Support for non-public networks [R16]Word-p. 247
5.31  Support for Cellular IoT [R16]Word-p. 252
5.32  Support for ATSSS [R16]Word-p. 267
5.33  Support for Ultra Reliable Low Latency Communication [R16]Word-p. 276
5.34  Support of deployments topologies with specific SMF Service Areas [R16]Word-p. 280
6  Network Functions [R15]Word-p. 285
7  Network Function Services and descriptions [R15]Word-p. 317
8  Control and User Plane Protocol Stacks [R15]Word-p. 329
A  Relationship between Service-Based Interfaces and Reference Points [R15]Word-p. 339
B (Normative)  Mapping between temporary identities [R15]Word-p. 341
C  Guidelines and Principles for Compute-Storage Separation [R15]Word-p. 342
D  5GS support for Non-Public Network deployment options [R16]Word-p. 343
E  Communication models for NF/NF services interaction [R16]Word-p. 344
F  Redundant user plane paths based on multiple UEs per device [R16]Word-p. 346
G  SCP Deployment Examples [R16]Word-p. 349
H (Normative)  Signalling of ingress time for time synchronization [R16]Word-p. 355
Z  Change historyWord-p. 356

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