5G Core Networks

5G Core Networks: Powering Digitalization provides an overview of the 5G Core network architecture, as well as giving descriptions of cloud technologies and the key concepts in the 3GPP rel-15/16 specifications. Written by the authors who are heavily involved in development of the 5G standards and who wrote the successful book on EPC and 4G Packet Networks, this book provides an authoritative reference on the technologies and standards of the 3GPP 5G Core network.

Content includes:

• An overview of the 5G Core Architecture
• The Stand-Alone and Non-Stand-Alone Architectures
• Detailed presentation of 5G Core key concepts
• An overview of 5G Radio and Cloud technologies

Learn

• The differences between the 5G Core network and previous core network generations
• How the interworking with previous network standards is defined
• Why certain functionality has been included and what is beyond the scope of 5G Core
• How the specifications relate to state-of-the-art web-scale concepts and virtualization technologies
• Details of the protocol and service descriptions
• Examples of network deployment options

• Provides a clear, concise and comprehensive view of 5GS/5GC
• Written by established experts in the 5GS/5GC standardization process, all of whom have extensive experience and understanding of its goals, history and vision
• Covers potential service and operator scenarios for each architecture
• Explains the Service Based Architecture, Network Slicing and support of Edge Computing, describing the benefits they will bring
• Explains what options and parts of the standards will initially be deployed in real networks, along with their migration paths

R&D engineers working in cellular communication systems, telecommunications business managers and consultants, post graduate students and university researchers in mobile and wireless communications

1. Introduction
1.1 5G—A new era of connectivity
1.2 A step change
1.3 A new context for operators
1.4 The road to 5G network deployments
1.5 3GPP release 15 and 16
1.6 Core requirements
1.7 New service grades
1.8 Structure of this book

2. Drivers for 5G
2.1 Introduction
2.2 New use cases
2.3 New technologies

3. Architecture overview
3.1 Introduction
3.2 Two perspectives on 5G Core
3.3 Service-based architecture (SBA)
3.4 The core of the core
3.5 Connecting the core network to mobile devices and radio networks
3.6 Mobility and data connectivity
3.7 Policy control and charging
3.8 5GC interworking with EPC
3.9 Voice services
3.10 Messaging services
3.11 Exposure of network information
3.12 Device positioning services
3.13 Network analytics
3.14 Public warning system
3.15 Support for devices connected over non-3GPP access networks
3.16 Network slicing
3.17 Roaming
3.18 Storage of data
3.19 5G radio networks

4. EPC for 5G
4.1 Introduction
4.2 Key EPC functions
4.3 (Enhanced) Dedicated Core Networks ((e)DECOR)
4.4 Control and User Plane Separation (CUPS)

5. Key concepts
5.1 Architecture modeling
5.2 Service Based Architecture
5.3 Identifiers

6. Session management
6.1 PDU Session concepts
6.2 PDU Session types
6.3 User plane handling
6.4 Mechanisms to provide efficient user plane connectivity
6.5 Edge computing
6.6 Session authentication and authorization
6.7 Local Area Data Network

7. Mobility Management
7.1 Introduction
7.2 Establishing connectivity
7.3 Reachability
7.4 Additional MM related concepts
7.5 N2 management
7.6 Control of overload
7.7 Non-3GPP aspects
7.8 Interworking with EPC

8. Security
8.1 Introduction
8.2 Security requirements and security services of the 5G system
8.3 Network access security
8.4 Network domain security
8.5 User domain security
8.6 Lawful intercept

9. Quality-of-Service
9.1 Introduction
9.2 Flow based QoS framework
9.3 Signaling of QoS
9.4 Reflective QoS
9.5 QoS parameters and characteristics

10. Policy control and charging
10.1 Introduction
10.2 Overview of policy and charging control
10.3 Access and mobility related policy control
10.4 UE policy control
10.5 Management of Packet Flow Descriptions
10.6 Network status analytics
10.7 Negotiation for future background data transfer
10.8 Session Management related policy and charging control
10.9 Additional session related policy control features
10.10 Charging

11. Network slicing
11.1 Introduction
11.2 Management and orchestration
11.3 Network Slice selection framework

12. Dual connectivity
12.1 Introduction
12.2 Multi-RAT Dual Connectivity overall architecture
12.3 MR-DC: UE and RAN perspective
12.4 MR-DC: Subscription, QoS flows and E-RABs, MR-DC bearers
12.5 Managing secondary RAN node handling for mobility and session management
12.6 Security
12.7 Reporting User Data Volume traversing via SN

13. Network functions and services
13.1 5G core network functions
13.2 Services and service operations

14. Protocols
14.1 Introduction
14.2 5G non-access stratum (5G NAS)
14.3 NG application protocol (NGAP)
14.4 Hypertext transfer protocol (HTTP)
14.5 Transport layer security (TLS)
14.6 Packet forwarding control protocol (PFCP)
14.7 GPRS tunneling protocol for the User Plane (GTP-U)
14.8 Extensible Authentication Protocol (EAP)
14.9 IP security (IPSec)
14.10 Stream Control Transmission Protocol (SCTP)
14.11 Generic routing encapsulation (GRE)

15. Selected call flows
15.1 Introduction
15.2 Registration and deregistration
15.3 Service Request
15.4 UE Configuration Update
15.5 PDU Session Establishment
15.6 Inter-NG-RAN handover
15.7 EPS interworking with N26
15.8 EPS fallback
15.9 Procedures for untrusted non-3GPP access

16. Architecture extensions and vertical industries
16.1 Overview
16.2 Architecture enhancements and extensions
16.3 New feature capabilities

17. Future outlook