ysical Layer Measurements UE Capability Summary References 5G Radio Protocols Tero Henttonen, Jarkko Koskela, Benoist Sébire, and Antti Toskala Introduction 149 5G Radio Protocol Layers SDAP 151 7.3.1 Overview 7.3.2 QoS Flow Remapping 7.3.3 7.3.4 Header 7.4.1 Overview 7.4.2 Reordering 7.4.3 Security 7.4.4 Header Compression 7.4.5 Duplicates and Status Reports 7.4.6 Duplication 7.5.1 Overview 7.5.2 Segmentation 7.5.3 Error Correction 7.5.4 Transmissions Modes 7.5.5 Duplication MAC Layer 7.6.1 Overview 7.6.2 Logical Channels Contents 7.6.3 Random Access Procedure 7.6.4 HARQ and Transmissions 7.6.5 Scheduling Request 7.6.6 Logical Channel Prioritization and Multiplexing 7.6.7 7.6.8 7.6.9 7.6.10 Bandwidth Parts 7.6.11 BFD and Recovery 7.6.12 Other Functions 7.6.13 MAC PDU Structure The RRC Protocol 7.7.1 Overview 168 7.7.2 Broadcast of System Information 7.7.2.1 Validity and Change of System Information 7.7.3 Paging 174 7.7.4 Overview of Idle and Inactive Mode Mobility 7.7.4.1 Cell Selection and Reselection Process 7.7.4.2 Intra-frequency and Equal-Priority Reselections 7.7.4.3 Inter-Frequency/RAT Reselections 178 7.7.4.4 Cell Selection and Reselection Measurements 7.7.4.5 Reselection Evaluation Altered by UE Mobility 7.7.5 RRC Connection Control and Mobility 7.7.5.1 RRC Connection Control 7.7.5.2 RRC Connection Setup from IDLE and INACTIVE 7.7.5.3 Mobility and Measurements in Connected Mode 7.7.6 RRC Support of Upper Layers 7.7.6.1 NAS Message Transfer 7.7.6.2 Network Slicing 7.7.6.3 UE Capability Transfer 7.7.7 Different Versions of Release 15 RRC Specifications Radio Protocols in RAN Architecture Summary References Deployment Aspects Harri Holma, Riku Luostari, Jussi Reunanen, and Puripong Thepchatri Introduction Spectrum Resources 8.2.1 Spectrum Refarming and Dynamic Spectrum Sharing Network Density Mobile Data Traffic Growth 8.4.1 Mobile Data Volume 8.4.2 Traffic Asymmetry Base Station Site Solutions Electromagnetic Field (EMF) Considerations Network Synchronization and Coordination Requirements Contents 8.7.1 M