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5G-NR-Air-Interface-MPIRICAL [Good doc on 5G NR]
5G-NR-Air-Interface-MPIRICAL [Good doc on 5G NR]
Contents
5G New Radio ........................................................................... 1-1
5G Phases ............................................................................................................ 1-2
1.1.1 NR (New Radio) Phases ......................................................................... 1-2
1.1.2 5G NR Roadmap ..................................................................................... 1-2
NG-RAN Architecture Interfaces .......................................................................... 1-3
1.2.1 Non-Standalone Architecture .................................................................. 1-3
1.2.2 Standalone Architecture .......................................................................... 1-3
1.2.3 EN-DC UE Protocols ............................................................................... 1-4
1.2.4 C-RAN for EN-DC ................................................................................... 1-5
EN-DC Terminology and Options ......................................................................... 1-6
1.3.1 MCG and SCG ........................................................................................ 1-6
1.3.2 EN-DC User Plane Bearer Options......................................................... 1-6
1.3.3 SRB3 ....................................................................................................... 1-8
1.3.4 Split SRB in EN-DC ................................................................................. 1-9
1.3.5 Preparing for EN-DC in the RAN .......................................................... 1-10
5G Physical Layer Transmission and Reception .................. 2-1
5G NR Duplexing ................................................................................................. 2-2
2.1.1 FDD and TDD Duplexing Modes ............................................................. 2-2
2.1.2 Supplementary Downlink ........................................................................ 2-2
2.1.3 Supplementary Uplink ............................................................................. 2-3
5G Frequency Bands ........................................................................................... 2-3
2.2.1 Definition of Frequency Ranges .............................................................. 2-4
2.2.2 5G NR Bands .......................................................................................... 2-4
2.2.3 EN-DC Band Combinations .................................................................... 2-5
2.2.4 Baseband Processing Combination ........................................................ 2-5
2.2.5 Harmonics and Intermodulation for EN-DC ............................................ 2-6
2.2.6 5G Carrier Numbering ............................................................................. 2-8
5G Waveform: CP-OFDM and DFT-OFDM .......................................................... 2-9
2.3.1 OFDM Subcarriers and Reference Signals ........................................... 2-10
2.3.2 Orthogonal Frequency Division Multiplexing ......................................... 2-10
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2.3.3 Cyclic Prefix .......................................................................................... 2-12
NR Numerology and Frame Structure ................................................................ 2-13
2.4.1 Numerology ........................................................................................... 2-13
2.4.2 Slot Length ............................................................................................ 2-14
2.4.3 Frame Structure .................................................................................... 2-14
2.4.4 NR Slots ................................................................................................ 2-15
2.4.5 5G NR Time Unit ................................................................................... 2-16
2.4.6 NR Cyclic Prefix .................................................................................... 2-16
2.4.7 NR Physical Resource Block ................................................................ 2-17
2.4.8 Resource Grid ....................................................................................... 2-18
2.4.9 5G NR Transmitted Signal .................................................................... 2-18
2.4.10 Slot Format Configuration ................................................................... 2-19
2.4.11 Uplink/Timing ....................................................................................... 2-20
Channel Bandwidth ............................................................................................ 2-21
2.5.1 Maximum Transmission Bandwidth ...................................................... 2-21
2.5.2 Carrier BWP (Bandwidth Part) .............................................................. 2-22
5G Massive MIMO and Beamforming ..................................... 3-1
Why Massive MIMO? ........................................................................................... 3-2
3.1.1 Requirement for Massive MIMO ............................................................. 3-2
3.1.2 Increasing Capacity ................................................................................. 3-2
MIMO .................................................................................................................... 3-3
3.2.1 Summary of Transmission Path in 5G NR .............................................. 3-3
3.2.2 MIMO Spatial Multiplexing ...................................................................... 3-5
3.2.3 SU-MIMO vs MU-MIMO .......................................................................... 3-5
Beamforming (Massive MIMO) ............................................................................. 3-6
3.3.1 Spatial Multiplexing vs Beamforming ...................................................... 3-6
3.3.2 Creating a Beam ..................................................................................... 3-6
3.3.3 Narrow Beams and Beam Steering ........................................................ 3-7
3.3.4 Beamforming Nulls .................................................................................. 3-7
3.3.5 Massive MIMO Antennas ........................................................................ 3-8
3.3.6 MIMO in a Handset ................................................................................. 3-9
3.3.7 Multiple Panel Antenna ......................................................................... 3-10
Beam Management in 5G NR ............................................................................ 3-10
3.4.1 Beam Sweeping .................................................................................... 3-11
3.4.2 SS Block ................................................................................................ 3-12
3.4.3 Beam Management Reference Signals ................................................ 3-12
3.4.4 Transmission Configuration and Quasi Co-Location ............................ 3-14
3.4.5 Single and Multiple CSI-RS................................................................... 3-15
3.4.6 Transmission Based on SRS ................................................................ 3-15
3.4.7 SS Burst and Burst Set ......................................................................... 3-16
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3.4.8 SS Block Locations ............................................................................... 3-16
3.4.9 SS/PBCH Block Index Indication .......................................................... 3-19
3.4.10 Beam Measurement, Determination and Reporting ........................... 3-19
Transmission in 5G NR ...................................................................................... 3-20
3.5.1 Downlink Transmission ......................................................................... 3-20
3.5.2 Uplink Transmission .............................................................................. 3-21
3.5.3 NR Downlink Antenna Ports .................................................................. 3-22
3.5.4 NR Uplink Antenna Ports ...................................................................... 3-22
5G Physical Layer Details ....................................................... 4-1
5G Physical Layer ................................................................................................ 4-2
4.1.1 Key Specifications ................................................................................... 4-2
4.1.2 Channels and Signals ............................................................................. 4-2
Processing Chain ................................................................................................. 4-6
4.2.1 Code Block Group ................................................................................... 4-6
4.2.2 Codewords to Antenna Ports .................................................................. 4-6
Downlink Physical Channels and Signals ............................................................ 4-8
4.3.1 Downlink Synchronization Signals .......................................................... 4-8
4.3.2 PSS and SSS .......................................................................................... 4-8
4.3.3 Physical Broadcast Channel ................................................................... 4-9
4.3.4 Physical Downlink Control Channel ...................................................... 4-11
4.3.5 Physical Downlink Shared Channel ...................................................... 4-14
4.3.6 PDSCH DMRS ...................................................................................... 4-16
Uplink Physical Channels ................................................................................... 4-19
4.4.1 Physical Random Access Channel ....................................................... 4-19
4.4.2 Physical Uplink Shared Channel ........................................................... 4-23
4.4.3 Physical Uplink Control Channel ........................................................... 4-25
Additional 5G Reference Signals........................................................................ 4-28
4.5.1 CSI-RS .................................................................................................. 4-28
4.5.2 Sounding Reference Signal .................................................................. 4-30
4.5.3 Phase Tracking Reference Signal ......................................................... 4-32
5G Layer 2 and Layer 3 ........................................................... 5-1
EN-DC RRC ......................................................................................................... 5-2
5.1.1 RRC Features ......................................................................................... 5-2
5.1.2 RRC States ............................................................................................. 5-2
5.1.3 RRC Messages ....................................................................................... 5-3
NR PDCP ............................................................................................................. 5-4
5.2.1 PDCP Services........................................................................................ 5-4
5.2.2 Functions ................................................................................................. 5-5
5.2.3 PDCP Profiles ......................................................................................... 5-5
5.2.4 PDCP Protocol Data Units ...................................................................... 5-7
5G Air Interface - Non-Standalone Operation
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NR Radio Link Control .......................................................................................... 5-9
5.3.1 Transparent Mode ................................................................................. 5-10
5.3.2 Unacknowledged Mode ......................................................................... 5-10
5.3.3 Acknowledged Mode ............................................................................. 5-11
5.3.4 RLC Protocol Data Units ....................................................................... 5-12
NR Medium Access Control ............................................................................... 5-15
5.4.1 MAC Services and Functions ................................................................ 5-15
5.4.2 MAC Control Elements .......................................................................... 5-16
5.4.3 NR RNTI Identities ................................................................................ 5-16
5.4.4 MAC Headers ........................................................................................ 5-18
5.4.5 Discontinuous Reception ...................................................................... 5-20
5G EN-DC Operation ................................................................ 6-1
Attaching and EN-DC Operation .......................................................................... 6-2
6.1.1 Initial E-UTRA Attach ............................................................................... 6-2
6.1.2 UE Capabilities ........................................................................................ 6-2
E-UTRA Measurements for EN-DC ...................................................................... 6-5
6.2.1 EUTRA Measurement Configuration Options ......................................... 6-5
6.2.2 Measurement Objects ............................................................................. 6-6
6.2.3 Report Configuration ............................................................................... 6-7
6.2.4 LTE Events Summary ............................................................................. 6-8
6.2.5 NR Events ............................................................................................... 6-9
6.2.6 Measurement Identities ........................................................................... 6-9
6.2.7 NR Measurement Timing Configuration ................................................ 6-10
PSCell Addition ................................................................................................... 6-11
6.3.1 Identifying Suitable NR Cell .................................................................. 6-11
6.3.2 Measurement Report ............................................................................ 6-11
6.3.3 SgNB Addition Request and Request Acknowledge ............................. 6-12
6.3.4 RRC Connection Reconfiguration ......................................................... 6-16
6.3.5 Timing .................................................................................................... 6-17
6.3.6 Random Access Process ...................................................................... 6-18
6.3.7 PSCell Split SRB ................................................................................... 6-26
6.3.8 PSCell Split DRB ................................................................................... 6-27
6.3.9 Secondary Node Release ..................................................................... 6-28
Radio Link Failure .............................................................................................. 6-29
6.4.1 RLF Configuration ................................................................................. 6-30
6.4.2 Out-of-Sync and In-Sync ....................................................................... 6-30
6.4.3 Failure Report ....................................................................................... 6-31
Beam Failure ...................................................................................................... 6-32
6.5.1 Beam Failure Parameters ..................................................................... 6-32
6.5.2 Beam Failure Detection ......................................................................... 6-32
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6.5.3 Beam Failure Recovery ......................................................................... 6-33
Power Control ..................................................................................................... 6-34
6.6.1 Downlink Power Allocation .................................................................... 6-34
6.6.2 Uplink Power Control ............................................................................ 6-35
5G Scheduling .......................................................................... 7-1
NR Scheduling...................................................................................................... 7-2
7.1.1 Downlink Control Information .................................................................. 7-2
7.1.2 Search Space .......................................................................................... 7-3
7.1.3 Aggregation Levels .................................................................................. 7-4
7.1.4 Resource Allocation Type ........................................................................ 7-5
7.1.5 Allocation Type 0 ..................................................................................... 7-5
7.1.6 Allocation Type 1 ..................................................................................... 7-6
7.1.7 Dynamic Switch ....................................................................................... 7-6
7.1.8 PDSCH and PUSCH Scheduling ............................................................ 7-7
7.1.9 Downlink Resource Allocation ................................................................. 7-7
7.1.10 PDSCH Time Domain Resource Allocation .......................................... 7-8
7.1.11 Table 1 and Table 2 PDSCH/PUSCH MCS ......................................... 7-10
7.1.12 Transport Block Size ........................................................................... 7-11
Uplink Resource Allocation ................................................................................. 7-12
7.2.1 PUSCH Time Domain Resource Allocation .......................................... 7-13
7.2.2 PUSCH MCS Index ............................................................................... 7-14
Configured Scheduling ....................................................................................... 7-14
7.3.1 Downlink ................................................................................................ 7-14
7.3.2 Uplink .................................................................................................... 7-15
Feedback ............................................................................................................ 7-16
7.4.1 Buffer Status Report .............................................................................. 7-17
7.4.2 Power Headroom Reporting ................................................................. 7-18
7.4.3 HARQ-ACK ........................................................................................... 7-19
7.4.4 Scheduling Request .............................................................................. 7-20
7.4.5 Channel State Information .................................................................... 7-20
7.4.6 Channel Quality Indicator ...................................................................... 7-21
EN-DC Resource Coordination .......................................................................... 7-22
7.5.1 Resource Coordination Signalling ......................................................... 7-22
7.5.2 Coordination Resource Bitmap ............................................................. 7-22
5G Mobility with EPC ............................................................... 8-1
EN-DC Mobility ..................................................................................................... 8-2
8.1.1 Mobility Options ....................................................................................... 8-2
8.1.2 NR Measurements .................................................................................. 8-2
EN-DC Change of Secondary Node..................................................................... 8-4
8.2.1 Triggers ................................................................................................... 8-4
5G Air Interface - Non-Standalone Operation
viii © Mpirical Limited, 2018 MPI5029-01
8.2.2 Secondary Node Triggered ..................................................................... 8-4
8.2.3 RRC Reconfiguration .............................................................................. 8-5
8.2.4 Measurement Gap Configuration ............................................................ 8-6
8.2.5 Handover Restriction List ........................................................................ 8-8
Inter MeNB Handover with EN-DC ....................................................................... 8-8
Glossary ................................................................................... 9-1
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2021-04-05 08:57 PM
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Re: 5G-NR-Air-Interface-MPIRICAL [Good doc on 5G NR]
Good documentation.
Is there any direct link for download the documentation ?
Last edited by humala; 2021-08-02 at 06:20 PM
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