Presented Osman Yilmaz - Team leader, 5G Radio Resource Control, Ericsson at URLLC Conference 2017 ** Shared with permission **

1. Osman N. C. Yilmaz
Ericsson
5G NR key radio concepts
to support URLLC

2. © Ericsson 2017 | Page 2
5g NR - timeplan
Rel-15Rel-14 Rel-16
NR Study Item NR WI Phase 1
LTE evo LTE evo LTE evo
Requirements ProposalsITU
3GPP
Specifications
2015 2016 2017 2018 2019 2020
IMT-2020
EvaluationSI: Channel mod.
SI: Requirements
NR WIs Phase 2NR SIs Phase 2
Non-standalone Standalone
Full IMT2020
© Ericsson 2017 | Page 2
URLLC identification
URLLC specification

3. © Ericsson 2017 | Page 3
5G NR use cases
LOW COST, LOW ENERGY
SMALL DATA VOLUMES
MASSIVE NUMBERS
ULTRA RELIABLE
VERY LOW LATENCY
VERY HIGH AVAILABILITY
URLLC
TRAFFIC SAFETY & CONTROL
INDUSTRIAL APPLICATION
& CONTROL
REMOTE
MANUFACTURING,
TRAINING, SURGERY
Massive MTC
CAPILLARY NETWORKS
LOGISTICS, TRACKING AND FLEET MANAGEMENT
SMART
AGRICULTURE
SMART BUILDING
SMART
METER
Enhanced Broadband
Smartphones
4k/8k UHD, Broadcasting, VR/AR,
Home, Enterprise, Venues, Mobile/Wireless/Fixed
Non-SIM
devices

4. © Ericsson 2017 | Page 4
5G NR - selected design targets
Beam
centric
Multi-
connectivity
Ultra-lean
Minimize network transmissions
not directly related to user-data delivery
?
Forward
compatibility
Low latency
One slot
Mini-slot
Multi-service
Network Slices
© Ericsson 2017 | Page 4

5. © Ericsson 2017 | Page 5
URLLC USE CASES
ITSSmart Grid
Tactile Internet
Automated
Guided Vehicle
Process
Automation
100ms
10-9
10ms
1ms
10-8 10-6 10-1
Remote
Control
10-7 10-5 10-4 10-3 10-2
Factory Automation
Latency
Packet error rate
Coping with challenging requirements

6. © Ericsson 2017 | Page 6
› Three main technical areas
– Low latency through short transmissions & timing
– Reliability through diversity
– Availability through multi-connectivity & multi-antenna
URLLC key concepts

7. © Ericsson 2017 | Page 7
› General
– Short TTI (LTE) / mini-slots (NR)
– High numerologies for shorter slot lengths (NR)
– Fast processing in NR
› ~1-2 OFDM symbols in UE for turn-around
› ~[7-14] OFDM symbols in gNB for turn-around
– Grant-free UL (LTE/NR)
– Puncturing in DL/UL for efficiency (LTE/NR)
› FDD
– Can be specifically for URLLC
› TDD
– Frequent change of UL-DL allocations needed
› Fast processing / turn-around
› Must be same configuration for URLLC and MBB
Low latency through
short transmissions & timing
x1
slot slot
mini-slot
RX TX
Fast HARQ
Fast dynamic scheduling
turn-around
FDD Uplink
› mini-slots / sTTI
› instant uplink access
› fast processing / turn-around
FDD Downlink
› mini-slots / sTTI
TDD
DL
UL

8. © Ericsson 2017 | Page 8
› One-shot transmission
– Use low code rate to obtain low error
 low efficiency, and requires robust
control
› Many-shot transmissions
– Repeat transmission of standard
reliability in time or frequency
 less efficient, but less demanding
› Retransmission (HARQ-based)
– Repeat only when needed
– The more retransmissions possible the
higher code rate can be used
 higher efficiency
Reliability through diversity
Short latency req.
Relaxed latency req.
Processing,
alignment Processing
Processing
Low code rate
Repetitions
Retransmissions
(Rare) (Very
rare)
Retransmission, fast HARQ
Retransmission over longer period
Frequency
duplication
Allowing more retransmissions:
- Shorter TTI (mini-slots, numerology)
- Shorter processing & turnaround
- Relaxed latency requirement
Bandwidth

9. © Ericsson 2017 | Page 9
› Multi-connectivity duplication
– Carrier aggregation
– Dual connectivity
› Over sectors
› Over sites
› Coordination
– Blanking
– Joint transmission
availability through multi-
connectivity and multi-antenna
› Multi-antenna
– Beamforming
– TX/RX diversity

10. © Ericsson 2017 | Page 10
How to Achieve
Latency and Reliability targets?
Latency
› Diversity: Frequency & Space
› Robust coding
› Multi-connectivity
Reliability
› Transmission Time Interval Reduction
(numerology and mini-slots)
› Smarter Scheduling
(configured instant uplink)
› Faster Processing
(front-loaded frame design)
› Distributed cloud & slicing
(local processing)
› Device to Device Concepts

11. © Ericsson 2017 | Page 11
1. I. Aktas, J. Ansari, S. Auroux, D. Parruca, M. D. P. Guirao, and B. Holfeld: "A Coordination Architecture for Wireless Industrial Automation", European Wireless Conference,
Dresden, Germany, May 2017.
2. S. A. Ashraf, Y.P. E. Wang, S. Eldessoki, B. Holfeld, M. Serror, J. Gross: "From Radio Design to System Evaluations for Ultra-Reliable and Low-Latency Communication",
European Wireless Conference, Dresden, Germany, May 2017.
3. I. Aktas and S. A. Ashraf: "Radio Design and Coordination for Wireless Industrial Automation", ITG Fachtagung Mobilkommunikation, Osnabrück, Germany, May 2017.
4. Junaid Ansari, Ismet Aktas, Christian Brecher, Christoph Pallasch, Nicolai Hoffmann, Markus Obdenbusch, Martin Serror, Klaus Wehrle, and James Gross, "Demo: A Realistic
Use-case for Wireless Industrial Automation and Control", In Proc. of Networked Systems (NetSys), Göttingen, Germany, March 2017.
5. S. A. Ashraf, I. Aktas, E. Eriksson, K. W. Helmersson, and J. Ansari: "Ultra-Reliable and Low-Latency Communication for Wireless Factory Automation: From LTE to 5G",
Proc. of IEEE conference on Emerging Technologies and Factory Automation, Berlin, Germany, September, 2016.
6. Bernd Holfeld, Dennis Wieruch, Thomas Wirth, Lars Thiele, Shehzad Ali Ashraf, Jörg Huschke, Ismet Aktas, and Junaid Ansari: "Wireless Communication for Factory
Automation: An Opportunity for LTE and 5G Systems", IEEE Communication Magazine, June, 2016.
7. Ericsson, “5G - key component of the Networked Society,“ RWS-150009, 3GPP RAN Workshop on 5G Phoenix, AZ, USA, September 17 – 18, 2015
http://www.3gpp.org/ftp/workshop/2015-09-17_18_RAN_5G/Docs/RWS-150009.zip
8. O. N. C. Yilmaz, Y.-P. E. Wang, N. A. Johansson, N. Brahmi, S. A. Ashraf and J. Sachs, “Analysis of Ultra-Reliable and Low-Latency 5G Communication for a Factory
Automation Use Case,” in IEEE ICC, London, Jun. 2015.
9. N. A. Johansson, Y.-P. E. Wang, E. Eriksson and M. Hessler, “Radio Access for Ultra-Reliable and Low-Latency 5G Communications,” in IEEE ICC, London, Jun. 2015.
10. J. Sachs, P. Popovski, A. Höglund, D. Gozalvez-Serrano and P. Fertl, “Machine-Type Communications,” book chapter in “5G Mobile and Wireless Communications
Technology,” ISBN 9781107130098, 2016, www.cambridge.org/9781107130098
11. S. A. Ashraf, F. Lindqvist, B. Lindoff, R. Baldemair, "Control Channel Design Trade-offs for Ultra-Reliable and Low-Latency Communication System", IEEE Globecom
Workshop on Ultra-Low Latency and Ultra-High Reliability in Wireless Communication, San Diego, USA, December, 2015.
12. N. Brahmi, O. N. C. Yilmaz, K. W. Helmersson, S. A. Ashraf, J. Torsner, "Deployment Strategies for Ultra-Reliable and Low-Latency Communication in Factory
Automation", IEEE Globecom Workshop on Ultra-Low Latency and Ultra-High Reliability in Wireless Communication, San Diego, USA, December, 2015.
13. A. Osseiran, J. Sachs, M. Puleri, ”Manufacturing Rengineered: robots, 5G and the industrial internet, Ericsson Business Review, no. 4, 2015,
https://www.ericsson.com/res/thecompany/docs/publications/business-review/2015/ebr-issue4-2015-industrial-iot.pdf
14. J. Torsner, K. Dovstam, G.Miklós, B. Skubic, G. Mildh, T. Mecklin, J. Sandberg, J. Nyqvist, J. Neander, C. Martinez, B. Zhang, J. Wan, “Industrial Remote Operation: 5G rises
to the challenge,” Ericsson Technology Review, vol. 92, http://www.ericsson.com/res/thecompany/docs/publications/ericsson_review/2015/etr-5g-remote-control.pdf
15. E. Dahlman, G. Mildh, S. Parkvall, J. Peisa, J. Sachs, Y. Selén and J. Sköld, "5G Wireless Access: Requirements and Realization," IEEE Communications Magazine, vol. 52,
no. 12, Dec. 2014.
Further reading

12. © Ericsson 2017 | Page 12