Preface -- Acknowledgements -- List of Abbreviations -- 1 Introduction -- 1.1 Architecture of a Mobile Telecommunication System -- 1.2 History of Mobile Telecommunications -- 1.3 Technologies for 5G -- 1.4 The 3GPP 5G System -- 1.5 Enhanced Mobile Broadband -- 1.6 Massive Machine-type Communications -- 1.7 Ultra-reliable Low-latency Communication -- References -- 2 Architecture of the Core Network -- 2.1 The Evolved Packet Core -- 2.2 The 5G Core Network -- 2.3 Network Areas and Identities -- 2.4 State Diagrams -- 2.5 Network Slicing -- 2.6 Non-3GPP Access to the 5G Core -- 2.7 Signalling Protocols -- 2.8 The Hypertext Transfer Protocol -- 2.9 Example Network Function Services -- References -- 3 Architecture of the Radio Access Network -- 3.1 The Evolved UMTS Terrestrial Radio Access Network -- 3.2 The Next-generation Node B -- 3.3 Architectural Options -- 3.4 Network Areas and Identities -- 3.5 RRC State Diagram -- 3.6 Signalling Protocols -- 3.7 Open Radio Access Networks -- References -- 4 Spectrum, Antennas and Propagation -- 4.1 Radio Spectrum -- 4.2 Antennas and Propagation -- 4.3 Radio Propagation Issues for Millimetre Waves -- 4.4 Multipath, Fading and Coherence -- References -- 5 Digital Signal Processing -- 5.1 Modulation and Demodulation -- 5.2 Radio Transmission in a Mobile Cellular Network -- 5.3 Orthogonal Frequency Division Multiple Access -- 5.4 Other Features of OFDMA -- 5.5 Signal-processing Issues for 5G -- 5.6 Error Management -- References -- 6 Multiple-antenna Techniques -- 6.1 Beamforming -- 6.2 Beamforming at the gNB -- 6.3 Beamforming at the Mobile -- 6.4 Beam Management -- 6.5 Spatial Multiplexing -- 6.6 Multiple-user MIMO -- 6.7 Massive MIMO -- 6.8 Single-user MIMO -- 6.9 Multipoint Transmission and Reception -- References -- 7 Architecture of the 5G New Radio -- 7.1 Air Interface Protocol Stack -- 7.2 Frequency Bands and Combinations -- 7.3 Frequency Domain Structure -- 7.4 Time Domain Structure -- 7.5 Multiple Antennas -- 7.6 Data Transmission -- References -- 8 Cell Acquisition -- 8.1 Acquisition Procedure -- 8.2 Resource Mapping -- 8.3 Acquisition of the SS/PBCH Block -- 8.4 System Information -- References -- 9 Random Access -- 9.1 Physical Random Access Channel -- 9.2 Random Access Procedure -- 9.3 Variations on the Random Access Procedure -- References -- 10 Link Adaptation -- 10.1 CSI Reference Signals -- 10.2 Channel State Information -- 10.3 Physical Uplink Control Channel -- 10.4 Sounding -- References -- 11 Data Transmission and Reception -- 11.1 Introduction -- 11.2 Transmission and Reception of the PDCCH -- 11.3 Scheduling Messages -- 11.4 Transmission and Reception of the PUSCH and PDSCH -- 11.5 Reference Signals -- 11.6 Hybrid ARQ Acknowledgements -- 11.7 Related Procedures -- 11.8 Performance of 5G -- References -- 12 Air Interface Layer 2 -- 12.1 Medium Access Control -- 12.2 Radio Link Control -- 12.3 Packet Data Convergence Protocol -- 12.4 Service Data Adaptation Protocol -- References -- 13 Registration Procedures -- 13.1 Power-on Sequence -- 13.2 Network and Cell Selection -- 13.3 RRC Connection Establishment -- 13.4 Registration Procedure -- 13.5 Deregistration Procedure -- References -- 14 Security -- 14.1 Security Principles -- 14.2 Network Access Security -- 14.3 Network Access Security Procedures -- 14.4 Network Domain Security -- 14.5 Service-based Architecture Domain Security -- References -- 15 Session Management, Policy and Charging -- 15.1 Types of PDU Session -- 15.2 Quality of Service -- 15.3 Implementation of PDU Sessions -- 15.4 Policy and Charging Control Architecture -- 15.5 PDU Session Management Procedures -- References -- 16 Mobility Management in RRC_CONNECTED -- 16.1 Introduction to RRC_CONNECTED -- 16.2 Measurement Configuration and Reporting -- 16.3 Handover Procedures -- 16.4 Dual Connectivity Procedures -- 16.5 State Transitions out of RRC_CONNECTED -- References -- 17 Mobility Management in RRC_IDLE -- 17.1 Introduction to RRC_IDLE -- 17.2 Cell Reselection Procedures -- 17.3 Registration Updating -- 17.4 State Transitions out of RRC_IDLE -- References -- 18 Mobility Management in RRC_INACTIVE -- 18.1 Introduction to RRC_INACTIVE -- 18.2 Mobility Management -- 18.3 State Transitions -- 18.4 Small Data Transmission in RRC_INACTIVE -- References -- 19 Inter-operation with the Evolved Packet Core -- 19.1 Inter-operation Architectures -- 19.2 Registration Modes -- 19.3 Use of the Migration Architecture -- 19.4 Interworking Without N 26 -- 19.5 Interworking with N 26 -- References -- 20 Foundations of 5G-Advanced -- 20.1 Location Services -- 20.2 Integrated Access and Backhaul -- 20.3 Use of Unlicensed Spectrum -- 20.4 Multicast and Broadcast Services -- 20.5 Non-terrestrial Networks -- 20.6 Network Automation, Artificial Intelligence and Machine Learning -- 20.7 Service Enabler Architecture Layer -- References -- 21 The Internet of Things -- 21.1 Time-sensitive Communications -- 21.2 Non-public Networks -- 21.3 5G Virtual Networks -- 21.4 Edge Computing -- 21.5 Massive Machine-type Communications -- 21.6 Messaging Services -- References -- 22 Vehicle Communications and the Sidelink -- 22.1 Vehicle-to-Everything (V2X) Communications -- 22.2 Uncrewed Aerial Vehicles -- 22.3 Proximity-based Services -- 22.4 Architecture of the Sidelink -- 22.5 Sidelink Timing Synchronization -- 22.6 Sidelink Transmission and Reception -- 22.7 Access Stratum Procedures for the Sidelink -- 22.8 Operation of Sidelink Communication -- 22.9 Operation of ProSe Direct Discovery -- References -- 23 From 5G-Advanced to 6G -- 23.1 Release 19 -- 23.2 6g -- References -- Further Reading -- Index.