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Beginners: Open RAN Terminology – Virtualization, Disaggregation & Decomposition

This video/presentation explains Open RAN terminology that different people, companies and organizations use. It starts with open interfaces and then looks at radio hardware disaggregation and compute disaggregation. Moving from 2G/3G/4G to 5G, it also explains the Open RAN approach to a decomposed architecture with RAN functional splits.

This forms part of our #OpenRAN videos where we discuss open movement, networks and #ORANalliance.

The corresponding video is available at: https://www.youtube.com/watch?v=xJykqLCrHQI

All our #3G4G5G slides and videos are available at:
Videos: https://www.youtube.com/3G4G5G
Slides: https://www.slideshare.net/3G4GLtd
Open RAN Page: https://www.3g4g.co.uk/OpenRAN/
5G Page: https://www.3g4g.co.uk/5G/
Free Training Videos: https://www.3g4g.co.uk/Training/

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Beginners: Open RAN Terminology – Virtualization, Disaggregation & Decomposition

  1. 1. Beginners: Open RAN Terminology Virtualization, Disaggregation & Decomposition @3g4gUK
  2. 2. Mobile Towers in Real Life BBU + RU Picture Source: National Instruments
  3. 3. Traditional Approach with ‘tight integration’ ©3G4G RRU RRU Dedicated Hardware with SPP Software BBU Proprietary or closed interfaces
  4. 4. Open RAN: Horizontal Openness (Open Interfaces) ©3G4G RRU RRU Dedicated Hardware with SPP Software BBU Open Interfaces Radio Hardware Disaggregation
  5. 5. 4G Evolved Packet System (EPS) ©3G4G MME/S-GW MME/S-GW EPC E-UTRAN S1-U X2 X2- U eNB eNB eNB eNB Open interfaces implies Open X2
  6. 6. Disaggregation: Vertical Openness (Virtualization) ©3G4G RRU RRU COTS Hardware with GPP Software vBBU Open Interfaces Compute Disaggregation
  7. 7. Evolution from Traditional to Virtualized to Containerized Deployment ©3G4G Picture Source: Kubernetes VNF CNF PNF
  8. 8. Traditional Approach with ‘tight integration’ ©3G4G RRU RRU Dedicated Hardware with SPP Software BBU Proprietary or closed interfaces 2G, 3G & 4G
  9. 9. Decomposed Architecture with ‘tight integration’ ©3G4G RRU RRU Dedicated Hardware with SPP Software DU Proprietary or closed interfaces Dedicated Hardware with SPP Software CU • RAN functional Split Architecture • Used for 5G
  10. 10. Open RAN: Horizontal Openness (Open Interfaces) ©3G4G RRU RRU Dedicated Hardware with SPP Software DU Open Interfaces Dedicated Hardware with SPP Software CU Radio Hardware Disaggregation
  11. 11. Non-Standalone (NSA) NR, LTE assisted, EPC connected ©3G4G MME/S-GW MME/S-GW EPC E-UTRAN S1-U X2 X2- U eNB eNB en-gNB en-gNB Based on: 3GPP TS 37.340 V15.4.0 (2018-12) Figure 4.1.2-1:EN-DC Overall Architecture
  12. 12. Next Generation Radio Access Network (NG-RAN) ©3G4G AMF/UPF AMF/UPF 5GC NG-RAN NG Xn Xn ng-eNB ng-eNB gNB gNB Based on: 3GPP TS 38.300 V15.4.0 (2018-12) Figure 4.1-1: Overall Architecture
  13. 13. Disaggregation: Vertical Openness (Virtualization) ©3G4G RRU RRU COTS Hardware with GPP Software vDU Open Interfaces COTS Hardware with GPP Software vCU Compute Disaggregation
  14. 14. ©3G4G
  15. 15. Disaggregation ©3G4G Source: Red Hat
  16. 16. Disaggregation ©3G4G Source: Red Hat
  17. 17. O-RAN Architecture with CU & DU ©3G4G Source: Parallel Wireless
  18. 18. RAN Disaggregation by Prof. Sachin Katti, VMware ©3G4G 4 levels of disaggregation taking place in the RAN 1. Radio Hardware 2. Compute 3. Management Plane 4. Control Plane (RIC)
  19. 19. ©3G4G Source: Fierce Wireless, 5G Blitz Week, Spring 2021 - video
  20. 20. References & Further Reading ©3G4G • 3G4G: Open RAN, OpenRAN and O-RAN (link) • Parallel Wireless: Whitepaper, Cloud-Native Applications 101 (link) • The 3G4G Blog: 5G RAN Functional Splits (link) • The 3G4G Blog: Open RAN Explanation, Videos, White papers and Other Resources (link) • Parallel Wireless: Introduction to O-RAN Philosophy (link) • Sachin Katti: Virtualizing and Opening up the Telco Network (link) • Tweet: Prof. Sachin Katti explains 4 levels of disaggregation taking place in the RAN (link) • The Mobile Network: How Nokia views the open and virtual RAN (link) • RedHat Blog: Open RAN and O-RAN in Brief (link)
  21. 21. Thank You To learn more, visit: 3G4G Website – https://www.3g4g.co.uk/ 3G4G Blog – https://blog.3g4g.co.uk/ Telecoms Infrastructure Blog – https://www.telecomsinfrastructure.com/ Operator Watch Blog – https://www.operatorwatch.com/ Connectivity Technology Blog – https://www.connectivity.technology/ Free 5G Training – https://www.free5gtraining.com/ Free 6G Training – https://www.free6gtraining.com/ Follow us on Twitter: https://twitter.com/3g4gUK Follow us on Facebook: https://www.facebook.com/3g4gUK/ Follow us on LinkedIn: https://www.linkedin.com/company/3g4g Follow us on SlideShare: https://www.slideshare.net/3G4GLtd Follow us on YouTube: https://www.youtube.com/3G4G5G ©3G4G

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  • AiminJustinSang

    Jun. 16, 2021
  • skjsun

    Jul. 1, 2021

This video/presentation explains Open RAN terminology that different people, companies and organizations use. It starts with open interfaces and then looks at radio hardware disaggregation and compute disaggregation. Moving from 2G/3G/4G to 5G, it also explains the Open RAN approach to a decomposed architecture with RAN functional splits. This forms part of our #OpenRAN videos where we discuss open movement, networks and #ORANalliance. The corresponding video is available at: https://www.youtube.com/watch?v=xJykqLCrHQI All our #3G4G5G slides and videos are available at: Videos: https://www.youtube.com/3G4G5G Slides: https://www.slideshare.net/3G4GLtd Open RAN Page: https://www.3g4g.co.uk/OpenRAN/ 5G Page: https://www.3g4g.co.uk/5G/ Free Training Videos: https://www.3g4g.co.uk/Training/

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