1. 1 IEEE ComSoc Ft Worth & Dallas DLT © 2012 Mischa Dohler Mischa Dohler CTTC, Spain IEEE ComSoc Distinguished Lectureship Tour Ft Worth & Dallas ComSoc Chapters 19 November 2012 Slide template is copyright of BeFEMTO. All rights reserved. Femtocells: Technologies, Standards and Applications

2. 2 IEEE ComSoc Ft Worth & Dallas DLT © 2012 Mischa Dohler Drivers & Vision

3. 3 IEEE ComSoc Ft Worth & Dallas DLT © 2012 Mischa Dohler Smartphones Cause Capacity Crunch © Thierry Lestable, Sagemcom home office 80% Indoors 20% Outdoors

4. 4 IEEE ComSoc Ft Worth & Dallas DLT © 2012 Mischa Dohler The Resulting Capacity Demand Prediction © Thierry Lestable, Sagemcom  Total worldwide mobile traffic by 2020:  more than 127 exa-bytes (10^18)  more than 30 times increase compared to today

5. 5 IEEE ComSoc Ft Worth & Dallas DLT © 2012 Mischa Dohler  IMT-A 4G capacity targets [ITU-R M.2133]:  2.2b/s/Hz for downlink and 1.4b/s/Hz for uplink in urban deployment  supported rate is thus maximal 100Mbps/km2 (500m cell size; 40MHz)  Capacity needs (reality check):  peak density of 8,000 people/Km2  of which only 10% subscribe to the broadband service  of which only 20% require access at the same time  each requiring 5Mbps  4G requirements …  … were short by a factor of 10 yesterday  … are short by a factor of 50 today  … will be short by a factor of 100 tomorrow 8,000 X 10% X 20% X 5Mbps = 800 Mbps/Km 2 Are we prepared to meet this capacity demand?

6. 6 IEEE ComSoc Ft Worth & Dallas DLT © 2012 Mischa Dohler Time for Major Design Changes To facilitate the exponential capacity increase, dramatic changes to how we design cellular systems are needed! … oh, and, yes, spectrum is not a problem and power efficiency neither …

7. 7 IEEE ComSoc Ft Worth & Dallas DLT © 2012 Mischa Dohler Going 5G: Change in Design Paradigms 1.Differentiate clearly between outdoors and indoors design 20% of time 80% of time Similar data experience outdoors & indoors important!

8. 8 IEEE ComSoc Ft Worth & Dallas DLT © 2012 Mischa Dohler Going 5G: Change in Design Paradigms 2. Put most efforts on architecture and management thereof

9. 9 IEEE ComSoc Ft Worth & Dallas DLT © 2012 Mischa Dohler Going 5G: Change in Design Paradigms 3. Acknowledge heterogeneous nature of wireless arena

10. 10 IEEE ComSoc Ft Worth & Dallas DLT © 2012 Mischa Dohler Going 5G: Change in Design Paradigms 4. Use absolute area capacity rather than spectral efficiencies heterogeneous spectrum use users care about rates

11. 11 IEEE ComSoc Ft Worth & Dallas DLT © 2012 Mischa Dohler Going 5G: Change in Design Paradigms 5. Cost considerations must be taken into account at design phase

12. 12 IEEE ComSoc Ft Worth & Dallas DLT © 2012 Mischa Dohler A. Femtocells

13. 13 IEEE ComSoc Ft Worth & Dallas DLT © 2012 Mischa Dohler Definition & Differentiation Of Femtocell FemtocellPicocellWifi Site Rentalcustomeroperatorcustomer Installationcustomeroperatorcustomer Electricity Billcustomeroperatorcustomer Radio Planningno (local)yes (prior & global)no Backhaul Connectionvia customerdedicatedvia customer Macrocell Interactionnot (yet)yesnot applicable Transmission Power< 23dBm23-30dBm20dBm Access Rightsmainly closedpublicclosed Handoverpossibleyesvertical Photo ©Sagem, TID © bandaancha.eu © 3g.co.uk

14. 14 IEEE ComSoc Ft Worth & Dallas DLT © 2012 Mischa Dohler The Femtocell Opportunity 1. Smart Digital Home: 2. Reduces Customer Churn: 3. Allows Traffic Offload: 4. Energy Saver For All: © Thierry Lestable, Sagemcom © Femto Forum, Thierry Lestable, Sagemcom © Mobile VCE, D. Laurenson

15. 15 IEEE ComSoc Ft Worth & Dallas DLT © 2012 Mischa Dohler Femtocell Market Growth Forecast © Informa Telecoms & Media © Thierry Lestable, Sagemcom

16. 16 IEEE ComSoc Ft Worth & Dallas DLT © 2012 Mischa Dohler Femtocell Design Challenges 1.Low Device Cost:  efficient, low-cost power amplifiers, highly sensitive receivers, flexible channel bandwidth, reliable RF filters; low cost and low power implementation; etc. 2.System Interference Management:  minimize interference to macro (and vice versa); minimize interference to adjacent femtos; coping with unplanned rollouts; coverage estimation, interference cancellation; etc. 3.Femtocell Capacity Maximization:  link and access management (handover, admission control, resource management, load balancing and flow control); dynamic bandwidth allocation and sharing; etc. 4.Backhaul Issues:  wired or wireless backhaul, reducing signaling load, QoS provisioning and traffic priorization, joint access and backhaul design; etc. 5.Viable System Architecture:  control & data planes, access control, authentication, local breakout, efficient forwarding, seamless mobility, zero-config, etc. © BeFEMTO

17. 17 IEEE ComSoc Ft Worth & Dallas DLT © 2012 Mischa Dohler Problem Of Interference With Femtos Source: Zubin Bharucha, DOCOMO Euro-Labs

18. 18 IEEE ComSoc Ft Worth & Dallas DLT © 2012 Mischa Dohler Femtocell Special Issues [to appear]

19. 19 IEEE ComSoc Ft Worth & Dallas DLT © 2012 Mischa Dohler Transactions on Emerging Technologies