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5G NR radio protocols to support URLLC

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

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5G NR radio protocols to support URLLC

  1. 1. Osman N. C. Yilmaz Ericsson 5G NR key radio concepts to support URLLC
  2. 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. 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. 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. 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. 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. 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. 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. 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. 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. 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. 12. © Ericsson 2017 | Page 12

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