Introduction to 3GPP R15-R17 RAN Features

1

工研院資通所 王鴻翔2020 Sep. 07, 3GPP 國際標準最新動態分享會@TAICS

版權宣告©工業技術研究院

Outline

2

• What is 5G

• 3GPP NR RAN Features▪ R15

▪ R16

▪ R17

• Summary

版權宣告©工業技術研究院

5G Applications

版權宣告©工業技術研究院 3

Ref: Samsung, “Moving Toward 6G”, 1st 6G summitSource: WP5D #22, June 2015

▪ enhanced Mobile Broadband (eMBB)

▪ massive Machine Type Communication (mMTC)

▪ Ultra-Reliable Low Latency Communication (URLLC)

5G KPIs

版權宣告©工業技術研究院 4

IMT-2020 Development Overview

版權宣告©工業技術研究院 5

Source : ITU

Proponent Submission RIT Outcome

3GPPSRIT

3GPP E-UTRA/LTE

Agreed for

the first

release

3GPP NR

RIT 3GPP NR

China RIT 3GPP NR + NB-IoT

Korea RIT 3GPP NR

TSDSI RIT 3GPP NR + NB-IoT

ETSI

TC DECTSRIT

DECT-2020 NR F.F.S. for

next

release

3GPP NR

Nufront RIT EUHT

RIT : Radio Interface Technology

SRIT : Set of RIT

NR : New Radio

EUHT : Enhanced Ultra High Throughput

6 proponents submit total 7 submissions to ITU-

R for developing IMT-2020

• 5 submissions are agreed

for the first release in 2020

• 2 submissions will be further studied

for the second release in 2021

Study Phase

2020 Nov.

3GPP R15-R17 timeline

版權宣告©工業技術研究院 6

2018 2019 2020 2021 2022

Early DropASN.1

Main DropASN.1

Late DropASN.1

R15 (5G Phase I)

R16 (5G Phase II)

Stage 3Freeze

R1Freeze

ASN.1Freeze

R17

R1Freeze

Stage 3Freeze

ASN.1Freeze

R15: Flexibility & Forward Compatible

R15 NR

版權宣告©工業技術研究院 7

• A unified 5G air interface design

- For eMBB and URLLC

Diverse Services Diverse Spectrum Diverse Deployments

5GNR Below ~7GHz

Above 24GHz

R15 Features

版權宣告©工業技術研究院 8

• High Frequency operation FR1: 450 MHz~7.125 GHz/FR2: 24.25~52.6 GHz

Scalable OFDM numerology

Multi-beam operation

• Wide band access BWP: consider low power consumption

• Low Latency & Reliability Flexible Frame Structure: mini-slot, self-contained

CBG-based re-transmission

• Advanced Channel Coding Support large data block, reliable control channel

BWP: Bandwidth PartCBG: Code Block GroupLDPC: low-density parity-checkDMRS: Demodulation Reference Signal

Source: R1-1718327 (MTK)

BWP

L1 Key Features

Advanced MIMO Technology

• Increase coverage/capacity

Beam Transmission

Beam Management

Flexible Structure

• Low/High frequency

Multiple Numerologies

• Spectrum efficiency

Dynamic DL/UL Configuration

• Low latency

Self-contained Structure

• Power Saving

Bandwidth Part Concept

版權宣告©工業技術研究院 9

15kHz

60k

Frequency

subframe

1ms

1 slot includes 14 symbols

120k

subframe

1ms

1 slot includes 7 symbols

30KHz

Source: R1-1707679 (LG)

Reliability

▪ PDCP

• Duplication of PDCP PDUs

L2 Key Features

QoS

▪ SDAP (Service Data Adaptation Protocol)

• Mapping between a QoS flow and a data radio bearer

• Marking QoS flow ID (QFI) in both DL and UL packets

版權宣告©工業技術研究院 10

Low Latency

▪ RLC

• Pre-processing: No concatenation

▪ MAC

• Pre-processing: MAC subPDU

• Sub-header+ MAC SDU

MAC subPDU

including MAC CE 1

MAC subPDU

including MAC CE 2

MAC subPDU

including MAC SDU...MAC subPDU

including MAC SDU

MAC subPDU including

padding (opt)

R/LCID

subheader

Fixed-sized

MAC CE

R/F/LCID/L

subheader

Variable-sized

MAC CE

R/F/LCID/L

subheaderMAC SDU

SDAP: Service Data Adaptation ProtocolPDCP: Packet Data Convergence ProtocolRLC: Radio Link ControlMAC: Medium Access Control

LTE vs. NR

版權宣告©工業技術研究院 11

LTE NR

Target KPI

Peak Data Rate 1 Gbps DL: 20 Gbps/UL: 10 Gbps

Mobility 350 km/h 500 km/h

U-plane Latency 10 ms 1 ms

Reliability 10^-4 10^-5

Connection Density 103 devices/km2 106 devices/km2

Spectrum Efficiency DL: 15 bps/HzUL: 6.75 bps/Hz

DL: 30 bps/HzUL: 15 bps/Hz

L1 Design

Overhead LTE: ~0.25 •0.14, for frequency range FR1 for DL•0.18, for frequency range FR2 for DL•0.08, for frequency range FR1 for UL•0.10, for frequency range FR2 for UL (*)

min. Scheduling Unit LTE: 1 subframeLTE-A: 2 OFDM symbols

2 OFDM symbols

min. Scheduling time(with normal CP)

LTE: 1msLTE-A: ~142.86us

15 KHz 30 KHz 60 KHz 120 Kz

~142.86us ~71.43us ~35.71us ~17.86us

(*) RP-172172

R15 Main/Late Drop

版權宣告©工業技術研究院 12

3GPP R15-R17 timeline

版權宣告©工業技術研究院 13

2018 2019 2020 2021 2022

Early DropASN.1

Main DropASN.1

Late DropASN.1

R15 (5G Phase I)

R16 (5G Phase II)

Stage 3Freeze

R1Freeze

ASN.1Freeze

R17

R1Freeze

Stage 3Freeze

ASN.1Freeze

R15: Flexibility & Forward CompatibleR16: Vertical domain expansion

R16 Features

版權宣告©工業技術研究院 14

5G Efficiency

eMBB enhancements• MIMO enhancements• MR-DC• Mobility Enhancements• 2-Steps RACH• UE Power Saving• Capability Signal Optimization• RIM/CLI• SON/MDT

Expanding the cellular

More Use cases• URLLC enhancements• IIoT enhancements• V2X• NR unlicensed• Positioning• IAB

MR-DC: Multi-RAT Dual ConnectivitySON: Self-Organizing NetworkMDT: Minimum Drive TestRIM: Remote Interference MitigationCLI: Cross Link Interference

IIoT: Industrial Internet-of-ThingsIAB: Integrated Access Backhaul

NRV2X

IIoT/URLLCEnhancement

IAB

MIMOEnhancement

UEPower Saving

MR-DC

NR-U

5GNR

R16

Vertical domain expansion

eMBB Enhancements

版權宣告©工業技術研究院 15

MIMO

enhancements• Coverage, Reliability,

Robustness in sub-6

and mmW

considering multi-

TRP/multi-beam

operation

UE Power Saving• Connected mode

enhancements for eMBB

use case

MR-DC• Asynchronous NR-NR

Dual-Connectivity

• Fast access to NR and

Multi-Radio Dual-

Connectivity

Mobility Enhancements• Mobility interruption time

reduction

• Mobility in the presence of

multiple beams for both FR1

and FR2

2-step RACH• Reduce access latency

through merging RACH

steps

TRP: Transmit and Receive Point

More Use Cases

版權宣告©工業技術研究院 16

NR unlicensed• Essential physical layer

structure, procedure, interface

design up to 52.5 GHz

V2X• Specify NR sidelink

solutions necessary to

support V2X service

URLLC

enhancements• To add missing

enablers of URLLC and

enable I-IOT

applications

IIoT enhancements• Header compression

• PDCP duplication

enhancement

• Intra-UE prioritization (L2

solution)

IAB• Multi-hop backhauling

for FR1 and FR2

Positioning• Function, interface

and reference signal

design for better

positioning accuracy

with FR1/FR2 radio-

layer supporting

3GPP R15-R17 timeline

版權宣告©工業技術研究院 17

2018 2019 2020 2021 2022

Early DropASN.1

Main DropASN.1

Late DropASN.1

R15 (5G Phase I)

R16 (5G Phase II)

Stage 3Freeze

R1Freeze

ASN.1Freeze

R17

R1Freeze

Stage 3Freeze

ASN.1Freeze

R15: Flexibility & Forward CompatibleR16: Vertical domain expansionR17: Continuing evolution and Accelerating 5G expansion

R17 Features

版權宣告©工業技術研究院 18

5GNR

R17

Continuing evolution and Accelerating 5G expansion - New services, expanded deployments and new spectrum bands

Continued eMBBenhancements

NR IIoTenhancements

IABenhancements

cm-level accuracypositioning

eXtendedReality

Reduced capability NR devices

New spectrum above 52.6GHz

Extended sidelink(V2X, Public Safety, relay etc.)

Unlicensed spectrum access above 52.6GHz

Non-Terrestrial Network

Continued eMBB Enhancements

版權宣告©工業技術研究院 19

Dynamic Spectrum Sharing

• Allowing LTE and NR to share the same carrier

• PDCCH enhancements for cross-carrier scheduling

Power Saving• Enhancements for

idle/inactive-mode UE power saving

• Enhancements on power saving techniques for connected-mode UE

MR-DC• Efficient activation/de-

activation mechanism for one SCG and SCells

• Conditional PSCellchange/addition

Multi-SIM• Paging collisions• UE indicating network

switch• Indicating a call is

VoLTE/VoNR

MIMOEnhancement on• Multi-beam operation,

mainly targeting FR2 while also applicable to FR1

• Support for multi-TRP deployment, targeting both FR1 and FR2

• SRS, targeting both FR1 and FR2

• CSI measurement and reporting

New Spectrum Bands

版權宣告©工業技術研究院 20

Extend NR operation up to 71GHz• Assuming beam based operation• Potential new Waveform/Numerology

impact on Physical layer procedure Radio interface protocol architecture and

procedures

B5G/6GR175G (R15/R16)4G

3000 GHz6 GHz 52.6 GHz

Spectrum Usage

71 GHz

Expanding 5G device ecosystem

版權宣告©工業技術研究院 21

IIoT URLLCEnhancements

• Physical Layer feedback enhancements

• Unlicensed band URLLC/IIoT operation

• Intra-UE multiplexing and prioritization

• Support of time synchronization enhancement

• RAN enhancements based on new QoS related parameters

Reduced Capability NR Devices

• For wearable, industrial sensors and video surveillance

• UE complexity reduction features

• Power saving and battery lifetime enhancement

NB-IoT & LTE-MTCEnhancements

• Support the broadening use cases and the long-term lifecycle of the two technologies

• Specify 16-QAM for NB-IoTand 14-HARQ processes for HD-FDD LTE-MTC

RP-190831(Nokia)

New Services

版權宣告©工業技術研究院 22

SidelinkEnhancement

• Consider V2X, Public Safety and commercial use cases

• Power saving• Resource allocation

enhancement• Sidelink DRX for

broadcast, groupcast, and unicast

Positioning• General enhancements

to the Rel-16 NR positioning features cm level accuracy latency

improvement

• Extension of positioning support to new areas and specific use cases IIoT Automotive

NR MBS• Group

scheduling• Unicast/multicast

switch• Reception in idle

XR• Studying and evaluation

considering VR, AR and Cloud Gaming applications

Small Data• Uplink data in

inactive• 2-step RACH &

4-step RACH• Preconfigured

PUSCH resources

MBS: Multicast and Broadcast ServicesMT: Mobile TerminatingMO: Mobile Originating

Expanded Deployments

版權宣告©工業技術研究院 23

IAB• Duplexing

enhancements • Topology

adaptation enhancements

• Topology, routing and transport enhancements

• RF and RRM requirements

Coverage Extension

• Identify baseline coverage performance and solutions for both DL and UL

Sidelink Relay• UE-to-network and

UE-to-UE coverage extension

• Single hop layer-3 relay/layer-2 relay

NTN• HAP (8-50km), LEO/GEO

based satellite access• RAN1: Timing relationship

enhancements, enhancements on UL time and frequency synchronization, HARQ

• RAN2: RA, Enhancement on UL scheduling to reduce scheduling latency, DRX, RLC/PDCP/CP enhancement

• RAN3: architecture enhancement

NTN-IoT• Identify

scenarios, study and recommend necessary changes to support NB-IoTand eMTC over satellite mainly in sub 6GHz

Summary

版權宣告©工業技術研究院 24

• R15: Flexibility & Forward Compatible A unified 5G air interface design for eMBB and URLLC

• R16: Vertical domain expansionNew use cases and verticals

• R17: Continuing evolution and Accelerating 5G expansionNew services, deployments and spectrum bands

What’s next?

版權宣告© 工業技術研究院

Email: hhwang@itri.org.tw

More information at

https://www.commresearch.com.tw/

Thank You!