introduction to 3gpp r15-r17 ran features
TRANSCRIPT
Introduction to 3GPP R15-R17 RAN Features
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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
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Outline
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• What is 5G
• 3GPP NR RAN Features▪ R15
▪ R16
▪ R17
• Summary
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5G Applications
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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
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IMT-2020 Development Overview
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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
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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
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• A unified 5G air interface design
- For eMBB and URLLC
Diverse Services Diverse Spectrum Diverse Deployments
5GNR Below ~7GHz
Above 24GHz
R15 Features
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• 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
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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
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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
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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
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3GPP R15-R17 timeline
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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• 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?
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