5G New Radio (inbunden)
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5G New Radio (inbunden)

5G New Radio

A Beam-based Air Interface

Inbunden Engelska, 2020-03-26
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A guide to the 3GPP-specified 5G physical layer with a focus on the new beam-based dimension in the radio system 5G New Radio: A Beam-based Air Interface is an authoritative guide to the newly 3GPP-specified 5G physical layer. The contributors--noted experts on the topic and creators of the actual standard--focus on the beam-based operation which is a new dimension in the radio system due to the millimeter wave deployments of 5G. The book contains information that complements the 3GPP specification and helps to connect the dots regarding key features. The book assumes a basic knowledge of multi-antenna technologies and covers the physical layer aspects related to beam operation, such as initial access, details of reference signal design, beam management, and DL and UL data channel transmission. The contributors also provide a brief overview of standardization efforts, IMT-2020 submission, 5G spectrum, and performance analysis of 5G components. This important text: Contains information on the 3GPP-specified 5G physical layer Highlights the beam-based operation Covers the physical layer aspects related to beam operation Includes contributions from experts who created the standard Written for students and development engineers working with 5G NR, 5G New Radio: A Beam-based Air Interface offers an expert analysis of the 3GPP-specified 5G physical layer.
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MIHAI ENESCU, PHD, is Senior Specialist, 5G Radio Standardization, Nokia Bell Labs, Finland. He has worked for Nokia for 14 years in 3GPP standardization on various physical layer topics. He is currently working on multi-antenna techniques for 5G technology and he is also serving as editor of 5G/NR Physical Layer specification (38.214).


List of Contributors xiii Preface xv Acknowledgments xvii Abbreviations xix 1 Introduction and Background 1 Mihai Enescu and Karri Ranta-aho 1.1 Why 5G? 1 1.2 Requirements and Targets 2 1.2.1 System Requirements 3 1.2.2 5G Spectrum 7 1.3 Technology Components and Design Considerations 10 1.3.1 Waveform 12 1.3.2 Multiple Access 13 1.3.3 Scalable/Multi Numerology 13 Motivation for Multiple Numerologies 13 5G NR Numerologies 13 1.3.4 Multi-antenna 17 1.3.5 Interworking with LTE and Other Technologies 18 1.3.6 5G Beam Based Technologies Across Release 15 and Release 16 19 Integrated Access and Backhaul 19 NR Operation on Unlicensed Frequency Bands (NR-U) 20 Ultra-Reliable and Low Latency Communications 21 Vehicular-to-everything (V2X) 21 Positioning 22 System Enhancements 22 2 Network Architecture and NR Radio Protocols 25 Dawid Koziol and Helka-Liina Maattanen 2.1 Architecture Overview 25 2.2 Core Network Architecture 26 2.2.1 Overview 26 2.2.2 Service Request Procedure 29 2.3 Radio Access Network 31 2.3.1 NR Standalone RAN Architecture 31 2.3.2 Additional Architectural Options 32 2.3.3 CU-DU and UP-CP Split 37 2.4 NR Radio Interface Protocols 41 2.4.1 Overall Protocol Structure 41 2.4.2 Main Functions of NR Radio Protocols 44 2.4.3 SDAP Layer 47 2.4.4 PDCP Layer 47 PDCP Packet Transmission 48 PDCP Duplication 49 Access Stratum (AS) Security 50 Robust Header Compression (ROHC) 50 2.4.5 RLC 50 Segmentation and Concatenation 51 RLC Reordering 51 ARQ Retransmissions and Status Reporting 52 2.4.6 MAC Protocol 53 Overview 53 Multiplexing and Demultiplexing 53 Logical Channel Prioritization 54 Hybrid Automatic Repeat Request (HARQ) 57 BWP Operation 58 Scheduling Request 60 Semi Persistent Scheduling and Configured Grants 60 Discontinuous Reception (DRX) 60 Buffer Status Reports 62 Timing Advance Operation 62 MAC Control Elements 63 2.4.7 Radio Resource Control (RRC) 67 Overview 67 RRC State Machine 68 Cells, Cell Groups, and Signaling Radio Bearers 70 System Information 71 Unified Access Control (UAC) 78 Connection Control 79 NAS Information Transfer 87 UE Assistance Information 87 RRC PDU Structure 89 3 PHY Layer 95 Mihai Enescu, Youngsoo Yuk, Fred Vook, Karri Ranta-aho, Jorma Kaikkonen, Sami Hakola, Emad Farag, Stephen Grant, and Alexandros Manolakos 3.1 Introduction (Mihai Enescu, Nokia Bell Labs, Finland) 95 3.2 NRWaveforms (Youngsoo Yuk, Nokia Bell Labs, Korea) 96 3.2.1 Advanced CP-OFDM Waveforms for Multi-Service Support 96 3.2.2 Low PAPR Waveform for Coverage Enhancement 102 3.2.3 Considerations on the Waveform for above 52.6 GHz 104 3.3 Antenna Architectures in 5G (Fred Vook, Nokia Bell Labs, USA) 105 3.3.1 Beamforming 105 3.3.2 Antenna Array Architectures 108 3.3.3 Antenna Panels 110 3.3.4 Antenna Virtualization 111 3.3.5 Antenna Ports 113 3.3.6 Beamforming for a Beam-Based Air Interface 115 3.4 Frame Structure and Resource Allocation (Karri Ranta-aho, Nokia Bell Labs, Finland) 115 3.4.1 Resource Grid 115 3.4.2 Data Scheduling and HARQ 118 3.4.3 Frequency Domain Resource Allocation and Bandwidth Part 119 3.4.4 Time Domain Resource Allocation 123 3.5 Synchronization Signals and Broadcast Channels in NR Beam-Based System (Jorma Kaikkonen, Sami Hakola, Nokia Bell Labs, Finland) 125 3.5.1 SS/PBCH Block 125 3.5.2 Synchronization Signal Structure 126 3.5.3 Broadcast Channels 128 PBCH 128 SIB1 129 Delivery of Other Broadcast Information and Support of Beamforming 135 3.6 Physical Random Access Channel (PRACH) (Emad Farag, Nokia Bell Labs, USA) 139 3