Foreword Acknowledgments 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 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 ldentiflers 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