AT&T: HetNet – Small Cell Placement and the resulting performance
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Presentation from Gordon Mansfield of AT&T at MWC15
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AT&T: HetNet – Small Cell Placement and the resulting performance
- 1. © 2015 AT&T Intellectual Property. All rights reserved. AT&T and the AT&T logo are trademarks of AT&T Intellectual Property. 1 HetNet – Small Cell Placement and the resulFng performance Gordon Mansfield March 3rd, 2015
- 2. 2 Small Cell Deployment – What is Success? Coverage Voice Retainability Packet Accessibility Throughput Mobility Capacity © 2015 AT&T Intellectual Property. All rights reserved. AT&T and the AT&T logo are trademarks of AT&T Intellectual Property.
- 3. Small Cell Placement using HARP © 2015 AT&T Intellectual Property. All rights reserved. AT&T and the AT&T logo are trademarks of AT&T Intellectual Property. 3
- 4. 4 Physical Resource Block (PRB) Cost per MB DistribuFon – Macro network • Cell edge has much higher PRB cost per MB (2.6 Fmes of average) © 2015 AT&T Intellectual Property. All rights reserved. AT&T and the AT&T logo are trademarks of AT&T Intellectual Property.
- 5. 5 Heat Map – PRB Per MB & Busy Hour Traffic PRB Per MB Heat Map Traffic Heat Map • OpFmal small cell placements – traffic hot spots with high PRB per MB cost Zoomed in Area (next slide) © 2015 AT&T Intellectual Property. All rights reserved. AT&T and the AT&T logo are trademarks of AT&T Intellectual Property.
- 6. 6 Heat Map – PRB Per MB & Busy Hour Traffic (Zoomed In View) • OpFmal small cell placements – traffic hot spots with high PRB per MB cost in the macro Busy Hour Traffic Heat Map © 2015 AT&T Intellectual Property. All rights reserved. AT&T and the AT&T logo are trademarks of AT&T Intellectual Property. PRB Per MB Hetnet PRB Per MB Macro Only
- 7. 7 PRB Cost per MB DistribuFon – Macro/Hetnet Comparison • The average PRB cost per MB for Hetnet is 19% lower than the Macro only average • For cell edge, Hetnet PRB per MB cost is 21% lower © 2015 AT&T Intellectual Property. All rights reserved. AT&T and the AT&T logo are trademarks of AT&T Intellectual Property.
- 8. • User Equipment (UE) Camping Priority (Technology and Frequency Band) • Best user experience – Maximize Mobility Robustness & User Throughput – Maximize Stay on Preferred Layer – Minimize Inter-‐Layer TransiFons & Inter-‐Technology TransiFons • Minimize OperaSons – Neighbor Lists HetNet Performance -‐ Layer Management 8 © 2015 AT&T Intellectual Property. All rights reserved. AT&T and the AT&T logo are trademarks of AT&T Intellectual Property.
- 9. HetNet Suburban Cluster 9 • 22 Small Cells in Suburban Cluster • Dense Foliage • Busy Road through Center of Cluster • ResidenSal Streets Leading in and out of Cluster • Terrain Blocks Macro Coverage © 2015 AT&T Intellectual Property. All rights reserved. AT&T and the AT&T logo are trademarks of AT&T Intellectual Property.
- 10. HetNet Performance – Suburban Cluster 10 • Handover OpFmizaFon – Balance Coverage and Quality Thresholds • Avoid Ping – Pong with the Macro © 2015 AT&T Intellectual Property. All rights reserved. AT&T and the AT&T logo are trademarks of AT&T Intellectual Property.
- 11. • RF Design • Coverage & Capacity • Transmit Power & LocaFon (Dominance vs Interference vs GPS) • Transport • SON • Macro InteracFon • Mobility • Layer Management • Coverage Overlap (Island?) Indoor Factors for Performance 11 © 2015 AT&T Intellectual Property. All rights reserved. AT&T and the AT&T logo are trademarks of AT&T Intellectual Property.
- 12. • Single 5 Floor Building with over 600K square feet • 25 Small Cells designed for 1900MHz OperaFon and Later Retuned to 850MHz • Upwards of 1000 AT&T Subscribers in the Building on a Weekday Basis HetNet Performance -‐ Indoor 12 © 2015 AT&T Intellectual Property. All rights reserved. AT&T and the AT&T logo are trademarks of AT&T Intellectual Property.
- 13. HetNet Performance – Indoor 13 © 2015 AT&T Intellectual Property. All rights reserved. AT&T and the AT&T logo are trademarks of AT&T Intellectual Property.
- 14. • Centralized SON – AutomaFcally Detects newly Deployed Small Cells – HetNet Scrambling Code OpFmizaFon (HSCO) • Allocates Free PSCs/PCIs based on Macro AllocaFon through UE Measurement Reports • Specifies OpFmal Individual PSCs for Doorway Small Cells • Dynamically Assigns an OpFmal PSC List for Interior Small Cell Sharing • Distributed SON – Auto PSC/PCI • Uses the cSON Provided PSC list for Small Cell AllocaFon with Interference MiFgaFon – HetNet Auto Neighbor RelaFons • UE Assisted Neighbor Assignments based in Measurement Reports Hybrid SON: AutomaSng Small Cell OperaSon for Performance 14 © 2015 AT&T Intellectual Property. All rights reserved. AT&T and the AT&T logo are trademarks of AT&T Intellectual Property.
- 15. NaSonwide Performance 15 • Small Cell Networks are EffecFve • Consistency in Design and OpFmizaFon key to Performance © 2015 AT&T Intellectual Property. All rights reserved. AT&T and the AT&T logo are trademarks of AT&T Intellectual Property.