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Beginners: Non Terrestrial Networks (NTN)

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A short video & presentation looking at what is meant by Non-Terrestrial Networks or NTN as being defined by 3GPP

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Beginners: Non Terrestrial Networks (NTN)

  1. 1. Non-Terrestrial Networks (NTN) @3g4gUK
  2. 2. Terrestrial and Non-Terrestrial Networks ©3G4G Terrestrial Networks © 3G4G
  3. 3. Terrestrial and Non-Terrestrial Networks ©3G4G Aircraft • Typically 9 to 11.5 kmTerrestrial Networks © 3G4G
  4. 4. Terrestrial and Non-Terrestrial Networks ©3G4G Satellites • GEO – 35,786 km • MEO – 7,000 to 25,000 km • LEO – 300 to 1,500 km Aircraft • Typically 9 to 11.5 kmTerrestrial Networks © 3G4G
  5. 5. Summary of proposed LEO Constellations Designs ©3G4G Source: Semantic Scholar
  6. 6. Telesat vs SpaceX vs OneWeb ©3G4G Source: MIT
  7. 7. ©3G4G
  8. 8. How Satellite Connectivity Works ©3G4G Internet Satellite Gateway Or Earth Station Satellite Terrestrial Base Station Earth Station Communication Link Mobile phones Satellite phone
  9. 9. How Satellite Connectivity Works ©3G4G Internet Satellite Gateway Or Earth Station Satellite Terrestrial Base Station Earth Station Communication Link Mobile phones Satellite phone Mobile Network Operator Core Network / Data Center
  10. 10. Terrestrial and Non-Terrestrial Networks ©3G4G Satellites • GEO – 35,786 km • MEO – 7,000 to 25,000 km • LEO – 300 to 1,500 km UAS • UAS Range – 8 to 50 km • Typically 18 to 27 km • HAPS – 20 km Aircraft • Typically 9 to 11.5 kmTerrestrial Networks © 3G4G UAS = Unmanned Aircraft System HAPS = High-Altitude Platform Station
  11. 11. Different Types of HAPS and Altitudes ©3G4G © 3G4G Aeroplane 9 to 11.5 km Google Loon 20 km Unmanned drones 20 - 25 km Aerostatic HAPS 20 km HAPSMobile 20 km
  12. 12. ©3G4G Source: 3GPP 3GPP TS 22.261 (Rel-15) 3GPP TR 22.822 (Rel-16) 3GPP TS 22.261 (Rel-16)
  13. 13. ©3G4G Source: 3GPP
  14. 14. NTN Characterization [3GPP TR 38.821] ©3G4G Platforms Altitude range Orbit Typical beam footprint size Low-Earth Orbit (LEO) satellite 300 – 1500 km Circular around the earth 100 – 500 km Medium-Earth Orbit (MEO) satellite 7000 – 25000 km 100 – 500 km Geostationary Earth Orbit (GEO) satellite 35 786 km notional station keeping position fixed in terms of elevation/azimuth with respect to a given earth point 200 – 1000 km UAS platform (including HAPS) 8 – 50 km (20 km for HAPS) 5 - 200 km High Elliptical Orbit (HEO) satellite 400 – 50000 km Elliptical around the earth 200 – 1000 km UAS - Unmanned Aircraft Systems LTA - Lighter than Air UAS HTA - Heavier than Air UAS
  15. 15. NTN Architectures ©3G4G 1. Transparent-satellite based NG-RAN architecture, 2. Regenerative-satellite based NG-RAN architecture with gNB on board, and 3. Regenerative-satellite based NG-RAN architecture with gNB- DU on board. 3GPP TR 38.821: Solutions for NR to support non-terrestrial networks (NTN)
  16. 16. Evolving from single-node in 4G to split function architecture in 5G ©3G4G Source: ITU-T GSTR-TN5G Transport network support of IMT-2020/5G UPUP L1'L1' RRU BBU EPC S1 CPRI CN CU DU RRU F1 NG eCPRI/CPRI/ NGFI L1",L2-RTL1",L2-RT L2-NRT,L3L2-NRT,L3 UPUP CPCP/UP corecore 4G 5G Xn X2 BBU – BaseBand Unit CU – Central Unit DU – Distributed Unit RRU – Remote Radio Unit
  17. 17. Mapping of CU and DU functions according to the split points ©3G4G CU – Central Unit DU – Distributed Unit RU – Remote Unit RRH – Remote Radio Head NGC – Next-generation Core
  18. 18. Transparent-satellite based NG-RAN architecture ©3G4G UE gNB NR Uu NG N6 5G CN Data Network NTN Gateway NG-RAN Remote Radio Unit
  19. 19. Regenerative-satellite based NG-RAN architecture with gNB on board ©3G4G UE gNB NR Uu NG N6 5G CN Data Network NTN Gateway NG-RAN NG over SRI
  20. 20. Regenerative-satellite based NG-RAN architecture with gNB-DU on board ©3G4G UE gNB-DU NR Uu NG N6 5G CN Data Network NTN Gateway NG-RAN F1 over SRI F1 gNB-CU
  21. 21. ©3G4G
  22. 22. Use-Cases and Applications ©3G4G • Continuity in connection over trains, boats, planes, etc. • Connectivity for ships out in the ocean • Service availability everywhere, especially for emergency communications • Connectivity for rural, remote, unserved and underserved areas • Connectivity for M2M/IoT devices • 3GPP TR 38.811, section 4.2 provides a lot more use cases for anyone interested
  23. 23. 3GPP References ©3G4G • 3GPP TS 22.261: Service requirements for the 5G system; Stage 1 • 3GPP TR 22.822: Study on using Satellite Access in 5G; Stage 1 • 3GPP TR 38.811: Study on New Radio (NR) to support non terrestrial networks • 3GPP TSG RAN meeting #83 RP-190710: Revised SID for Study on solutions for NR to support non-terrestrial networks (NTN) • 3GPP TR 38.821: Solutions for NR to support non-terrestrial networks (NTN) • 3GPP TS 38.401: NG-RAN; Architecture description
  24. 24. Thank You To learn more, visit: 3G4G Website – https://www.3g4g.co.uk/ 3G4G Blog – https://blog.3g4g.co.uk/ Operator Watch – https://operatorwatch.3g4g.co.uk/ Connectivity Technology Blog – https://www.connectivity.technology/ 3G4G Small Cells Blog – https://smallcells.3g4g.co.uk/ 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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