5G Core Networks

5G Core Networks

Powering Digitalization

1st Edition - November 13, 2019

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  • Authors: Stefan Rommer, Peter Hedman, Magnus Olsson, Lars Frid, Shabnam Sultana, Catherine Mulligan
  • eBook ISBN: 9780081030103
  • Paperback ISBN: 9780081030097

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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

Key Features

  • 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

Table of Contents

  • 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

Product details

  • No. of pages: 502
  • Language: English
  • Copyright: © Academic Press 2019
  • Published: November 13, 2019
  • Imprint: Academic Press
  • eBook ISBN: 9780081030103
  • Paperback ISBN: 9780081030097

About the Authors

Stefan Rommer

Stefan Rommer is a Senior Specialist at Ericsson in Gothenburg, Sweden. Since joining Ericsson in 2001 he has worked with different areas of telecommunications, primarily with packet core network standardization and development. He has been involved in 5G standardization from the start and participated actively in 3GPP for several years. Stefan holds an M.Sc. in engineering physics and a Ph.D. in theoretical physics, both from Chalmers University of Technology, Sweden.

Affiliations and Expertise

Senior Specialist, Ericsson in Gothenburg, Sweden

Peter Hedman

Peter Hedman joined Ericsson in 2000 after previously working for the company for five years as a consultant within different areas such as Intelligent Networks and GSM/NMT Gateway development. Since joining Ericsson he has been attending 3GPP SA WG2 contributing to the standardization of e.g. GPRS, EPS, IMS, WiFi-3GPP access interactions, M2M/IoT and 5GS. His current focus is 5G standardization and he is rapporteur for the 5G System procedures specification specified by 3GPP SA WG2. He received his Master's in Computer Science from Lund Institute of Technology.”

Affiliations and Expertise

Consultant, Ericsson

Magnus Olsson

Magnus Olsson is an expert in system architecture and standardization at Ericsson. He has worked with the overall mobile network architecture since joining Ericsson in 1995 and has over 10 years of experience in the standardization of mobile systems. He served as the chairman of 3GPP TSG SA WG2 (Architecture Working Group) for four years and has contributed to numerous specifications within this forum. He has been involved in driving the System Architecture Evolution (SAE) work item since its inception within 3GPP. He holds an MSc in Applied Physics and Electrical Engineering from the Linköping Institute of Technology.

Affiliations and Expertise

Ericsson, Sweden

Lars Frid

Lars Frid is a Director of Strategic Product Management of 5G Core Networks at Ericsson, currently based in Stockholm, Sweden. He has over 25 years of experience of working with wireless data communications in Sweden and in Silicon Valley, California, US. His area of work has covered global standards and technologies for 2G, 3G, and 4G mobile data communications, as well as IP routing, satellite systems, and dedicated mobile data systems for industries and enterprises.His current priorities is to drive product strategies for 5G systems, with a specific focus on business modelling and business development in relation to 5G network architectures and capabilities.Lars holds several patents in mobile communications and is the co-author of two books. He has a Master’s degree in Electrical Engineering from studies at Chalmers University of Technology in Gothenburg, Sweden, and Imperial College of Science, Technology & Medicine in London, UK.

Affiliations and Expertise

Director of Strategic Product Management of 5G Core Networks, Ericsson, Stockholm, Sweden

Shabnam Sultana

Shabnam Sultana is an expert in standardization architecture at Ericsson. She has worked with the overall mobile network architecture since joining Ericsson in 1993 and has over 15 years of experience in the standardization of mobile systems. She has worked in the areas of North American Systems and associated Standards prior to joining 3GPP. She has been involved in driving the IP Multimedia System (IMS) and System Architecture Evolution (SAE) work since their inception within 3GPP. She holds an Bachelor’s degree in Electrical Engineering from Concordia University, Montreal, Canada.

Affiliations and Expertise

Systems Architect, Ericsson

Catherine Mulligan

Dr Cathy Mulligan is a Visiting Researcher at Imperial College and was a founding Co-Director of the ICL Centre for Cryptocurrency Research and Engineering. She is also a Senior Research Associate at University College where she is Chief Technology Officer of the GovTech Lab and DataNet, which focuses on the potential and application of blockchain, AI and advanced communications technologies as a foundational part of the world’s economy. Cathy is an expert and fellow of the World Economic Forum’s Blockchain council and has recently become a member of the United Nations Secretary General’s High Level Panel on Digital Co-Operation. She holds a PhD and MPhil from the University of Cambridge and is the author of several books on telecommunications including EPC and IoT.

Affiliations and Expertise

Imperial College, London, UK

Ratings and Reviews

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  • Richard M. Tue Jul 14 2020

    Richard M

    The purpose of this book should be to make the 3GPP standards easier to consume, at least as an intro to 5G, but unfortunately the quality of the writing and proof-reading mean this book falls short in many places.

  • JosephFong Mon Feb 03 2020

    5G Core Network

    Most detailed book about 5GC ever in the market