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The 2 definitions of Heterogeneous Networks (HetNets)

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A look at the two different definitions that are used for Heterogeneous Networks or HetNets.

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The 2 definitions of Heterogeneous Networks (HetNets)

  1. 1. The 2 definitions of Heterogeneous Networks (HetNets) @3g4gUK
  2. 2. Mobile Towers in Theory ©3G4G
  3. 3. Mobile Towers in Theory ©3G4G
  4. 4. Mobile Towers in Practice ©3G4G
  5. 5. Homogeneous Network ©3G4G
  6. 6. Homogeneous Network ©3G4G Hierarchical Cell Structures (HCS)
  7. 7. ©3G4G Rural
  8. 8. Heterogeneous Network (HetNet) – Defn #1 ©3G4G Macrocell Layer 1 Macrocell Layer 2 Macrocell Layer 3 Picocell Microcell Femtocell
  9. 9. Source: Cisco presentation from LTEWS 2013 ©3G4G
  10. 10. Source: Cisco presentation from LTEWS 2013 ©3G4G
  11. 11. Source: Cisco presentation from LTEWS 2013 ©3G4G
  12. 12. Source: Cisco presentation from LTEWS 2013 ©3G4G
  13. 13. Hierarchically Structured Network I prefer to use this term rather than calling them HetNets. Note that in Hierarchical Cell Structures (HCS), each layer has a different frequency ©3G4G
  14. 14. The ‘LTE’ concept of HetNet ©3G4G ✓ X✓
  15. 15. The ‘LTE’ concept of HetNet ©3G4G ✓ X✓
  16. 16. The ‘LTE’ concept of HetNet ©3G4G ✓✓ ✓
  17. 17. The ‘LTE’ concept of HetNet ©3G4G ✓✓ ✓ ?? Aggressor Cell Victim Cell
  18. 18. Non-CA based Enhanced ICIC (eICIC) ©3G4G ABS ABS ABS ABS 0 1 0 1 1 0 0 0 1 0 Aggressor cell Tx Power Subframe UE #C UE #B UE #A Picocell (Victim) Macrocell (Aggressor) X2 (ABS Info) Cell Range Expansion (CRE) Source: eXplanoTech
  19. 19. CA based Enhanced ICIC (eICIC) ©3G4G PDCCH UE #B Control signal on F1 Data signal on both PDSCH PDSCH PDCCH UE #A Control signal on F2 Data signal on both PDSCH PDSCH UE #A UE #B F1 F2 X2 (ABS Info) UE#A and UE#B are Cross-Carrier Scheduled (CCS) Source: eXplanoTech
  20. 20. Non-CA based Further enhanced ICIC (FeICIC) ©3G4G • At the transmitter side in DL • Combination of ABS + power reduction • At the receiver side in DL • Use of advanced UE receiver (cancellation/discard of known signals such as CRS…) Picture Source: Frank Rayal
  21. 21. References for further study ©3G4G • 3GPP: HetNet/Small Cells • eXplanoTech: Heterogeneous Networks (HetNets) • Frank Rayal: Further Enhanced ICIC (FeICIC) • Netmanias: Interference Coordination in LTE/LTE-A (2): eICIC (enhanced ICIC)
  22. 22. Thank You To learn more, visit: 3G4G Website – http://www.3g4g.co.uk/ 3G4G Blog – http://blog.3g4g.co.uk/ 3G4G Small Cells Blog – http://smallcells.3g4g.co.uk/ Operator Watch - http://operatorwatch.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 Follow us on Storify: https://storify.com/3g4gUK ©3G4G

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