This book explains the new 5G system from an end‐to‐end perspective, starting from the 5G vision and business drivers, deployment and spectrum options going to the radio and core network architectures and fundamental features including topics like QoS, mobility and session management, network slicing and 5G security. The book also contains an extensive discussion of IoT‐related features in GSM, LTE, and 5G. As indicated in the preface, some familiarity of the reader with basic concepts of mobile networks and especially with LTE/EPC is beneficial, although not a must for all chapters.

Chapter 1 will address the drivers and motivation for 5G. It will also provide insights into 5G use cases, requirements from various sources, like NGMN, ITU‐R and 5GPPP, and its ability to support new services. In addition, it will touch on the business models enabled by the new radio and core architecture, and on possible deployment strategies. Furthermore, it will provide insights into organizations involved in defining use cases, requirements and developing the 5G eco system. It also provides an overview of the 3GPP timeline and content of Release 15 and Release 16. This chapter does not require detailed technical knowledge about mobile networks.

Chapter 2 provides insights into spectrum considerations for the new 5G radio regarding all possible bands. Additionally, readers will get a good understanding of the characteristics of available new spectrum for 5G that sets fundamental requirements for radio design deployment and how spectrum is used, based on available channel models and measurements. It will also provide information about regional demands for licensed and unlicensed spectrum and about new regulatory approaches for spectrum licensing in the 5G era.

Chapter 3 describes the new 5G radio access technology. It includes the evolution of LTE access towards 5G, description of new waveforms, massive MIMO, and beamforming technologies, which are key features of the new 5G radio. This chapter will also explain the physical layer frame structure with its necessary features and functionalities. Furthermore, the chapter will explain the complete physical layer design and procedures in both downlink and uplink. Finally, the chapter explains the radio protocols operating on top of the 5G physical layer and procedures required to build the complete 5G radio access system. This chapter will also discuss solutions on how 5G caters to the extreme bandwidth challenge, considering challenges providing broadband access in indoor, rural, sub‐urban, and urban areas.

Chapter 4 provides detailed insights into the drivers and motivations for the new 5G system. It gives an overview of the System Architecture, RAN architecture, architectural requirements, basic principles for the new architecture, and the role of technology enablers in developing this new architecture. It provides a comparison with EPS, describes the essence of the 5G system, newly introduced features, and explains how interworking between EPS and the 5G system will work in detail. This chapter details the key features including network slicing, data storage principles for improved network resiliency and information exposure, generic exposure framework, architectural enablers for mobile edge computing, support for non‐3GPP access, fixed‐mobile convergence, support for IMS, SMS, location services, public warning system, and charging. It also includes a summary of control and user plane protocol stacks.

Chapter 5 describes the 5G mobility management principles followed in radio and core network. It will also provide a comparison of 5G mobility management with existing mobility management in LTE/EPC. This will include a description of 5G mobility states, connected and idle mode mobility for standalone and non‐standalone deployments. It will also include procedures for interworking towards LTE/EPC. Furthermore, it will provide insights into how mobility support for ultra‐high reliability applications or highly mobile devices is achieved in 5G, considering single connectivity and multi‐connectivity features.

Chapter 6 provides an overview of Session Management and QoS principles in 5G. It defines the data connectivity provided by the 5GS (PDU sessions, PDU session continuity modes, traffic offloading, etc.). It describes the 5GS QoS framework (QoS Flows, parameters of 5GS QoS, reflective QoS, etc.). Finally, it gives an overview of how applications can influence traffic routing and policy control for PDU sessions.

Chapter 7 provides insights into the 5G security vision and architecture. It explains device and network domain security principles and procedures based on 3GPP standards. This also includes a description of the key hierarchy used within the 5G security framework. In addition, this chapter provides an overview of NFV, SDN, and network slicing security challenges and corresponding solutions.

Chapter 8 provides an overview of ultra‐low latency and high reliability use cases, their challenges and requirements, e.g. remote control, industrial automation, public safety, and V2X communication. It also provides an overview of radio and core network related solutions enabling low latency and high reliability from an end‐to‐end perspective.

Chapter 9 provides a description of 5G solutions and features supporting massive machine type communication and IoT devices. The chapter outlines the requirements and challenges imposed by a massive number of devices connected to cellular networks. In addition, the chapter also gives a detailed overview of how M2M and IoT communication is supported with technologies like LTE‐M, NB‐IoT, and GSM along with System Architecture enhancements supported for M2M and IoT devices.

Chapter 10 is meant as a summary and wrap‐up of the whole book, highlighting the most important facts about 5G and providing an outlook of new features that can be expected in future 3GPP releases.