the limits of 4g and how to design a new 5g phy
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Vodafone Chair Mobile Communications Systems, Prof. Dr.-Ing. Dr. h.c. G. Fettweis The Limits of 4G and How to Design a New 5G PHY Gerhard P. Fettweis Vodafone Chair Professor CTW 2013 25 th June 2013, Phuket at TU Dresden Key Facts and

  1. Vodafone Chair Mobile Communications Systems, Prof. Dr.-Ing. Dr. h.c. G. Fettweis The Limits of 4G and How to Design a New 5G PHY Gerhard P. Fettweis – Vodafone Chair Professor CTW 2013 25 th June 2013, Phuket

  2. at TU Dresden Key Facts and Figures The Team IPP Sponsors • 1 professor • 8 senior scientists/lecturers/post-docs • 32 Ph.D. students • 15+ Master students • 4 program managers • 8 start-up incubator employees • 5 secretaries • 5 lab engineers Project Partners Accomplishments Scientific: Innovation: • 62 Ph.D. grads • 10 spin-outs • 200+ Ms. grads • 350 engineers • 700+ publications Funding: • 9,000+ citations • € 50M Chair • 200+ patent appl. • € 50M VC • 85+ patent families • € 1/3B projects 6/25/2013 Gerhard Fettweis Slide 2

  3. The Vodafone Chair‘s Startup History founded 2002 1999 OnDSP™ based WLAN chip-sets 2006 2000 SON systems 2012 2003 Broadband Wireless HW (LTE,…) 2006 2004 Module and reference board design 2007 2005 MPSoC semiconductor IP freedelity 2007 Wireless audio 2008 Network performance measurement 2010 2008 LTE Cellular Handset Chip IP 2010 Satellite Communications 2013 Assisted living 2012 Startbahn Venture Fund 6/25/2013 Gerhard Fettweis Slide 3

  4. Vodafone Chair Mobile Communications Systems, Prof. Dr.-Ing. Dr. h.c. G. Fettweis 5G – What Is It? Dresden, 05 June 2013 Slide 4

  5. WIRELESS ROADMAP 6/25/2013 Gerhard Fettweis Slide 5

  6. The Outlook: The Box in 2020+ Assume 128K processors per chip 4x4 chip-stacks on board 128x chips stacked in 3D 4x boards in a box HAEC Box  10 9 processors! in 10x10x10 cm 3 (1 liter)  10 5 x performance of today! 8192 chips 6/25/2013 Gerhard Fettweis Slide 6

  7. Coverage: Cellular 100Gb/s Short links (1m) 10Gb/s USB 3.0 802.15.3c WLAN (10m) UWB intention 1Gb/s USB 2.0 802.11ac/ad 802.11n 100Mb/s 802.11ag LTE Advanced 802.11b HSPA 10Mb/s LTE USB 1.0 HSDPA Cellular (100m) 1Mb/s 802.11 3G R99 / EDGE 100Kb/s GPRS GSM 10Kb/s 1995 2000 2005 2010 2015 TU Dresden Gerhard Fettweis Slide 7

  8. >2020 Outlook 100Tb/s 10 Tb/s ? 1 Tb/s 100Gb/s 10Gb/s 1Gb/s 100Mb/s 10Mb/s 1Mb/s 100Kb/s 10Kb/s 1995 2000 2005 2010 2015 2020 2025 2030

  9. 2005/4/4 – Via Della Conciliazione 6/25/2013 Gerhard Fettweis Slide 9 Source: http://www.spiegel.de/panorama/bild-889031-473266.html

  10. 2013/3/12 – Via Della Conciliazione Enabling Ad-Hoc Mobile “Free-Viewpoint Video” 6/25/2013 Source: http://www.spiegel.de/panorama/bild-889031-473242.html Gerhard Fettweis Slide 10

  11. Watch Out ! ? http://static.o2.co.uk/www/img/iphone-device/4_phones.png http://www.iclarified.com/images/news/28607/111946/111946-1280.png 6/25/2013 Gerhard Fettweis Slide 11

  12. THE TACTILE INTERNET G. Fettweis A 5G Wireless Communications Vision , 2012-12-15, Microwave Journal www.microwav ejournal.com/articles/print/18751-a-5g-wireless-communications-v ision 6/25/2013 Gerhard Fettweis Slide 12

  13. Human Reaction – How Fast is Fast? http://i.cdn.turner.com/si/multimedia/photo_gallery/1108/famous.false.starts/images/01.bolt.jpg 6/25/2013 Gerhard Fettweis Slide 13

  14. Physiology and Psychology 1 sec 100ms 10ms 1ms 25.06.2013 Gerhard Fettweis Slide 14

  15. Physiology and Psychology 1 sec 100ms 10ms 1ms 25.06.2013 Gerhard Fettweis Slide 15

  16. Gaming… http://popular-pics.com/Cool_World_Record_LAN_Event_Computer_Pictures__5 http://gametaffy.com/imho-the-lan-party/ 6/25/2013 Gerhard Fettweis Slide 16

  17. Professional Audio http://www.germanpulse.com/wp-content/uploads/2013/02/HerbertGroenemeyerGuitarPhotoByAliKepenek.jpg 6/25/2013 Gerhard Fettweis Slide 17

  18. Remote Heli http://ds_product_photos.s3.amazonaws.com/large/9756.jpg 6/25/2013 Gerhard Fettweis Slide 18

  19. FITS – Future Intelligent Things and Systems Usage Scenario Autonomous Vehicles  Today’s urban Traffic  Future Vision Example: Urban Traffic at Arc de Triomphe 6/25/2013 Gerhard Fettweis Slide 19

  20. Remote Driving 2.0 6/25/2013 Gerhard Fettweis Slide 20

  21. Platooning 2.0  1ms examples of today’s cars: ESP, ABS  Tomorrow: platooned ESP & ABS 6/25/2013 Gerhard Fettweis Slide 21

  22. Traffic Control TU Dresden Gerhard Fettweis Slide 22

  23. Wireless Airbags Crash to impact: 10-15ms  Crash sensor  Trigger  Air bag 6/25/2013 Gerhard Fettweis Slide 23

  24. Exoskeletons – “Power Limbs” http://news.cnet.com/8301-17938_105-57532729-1/nasa-exoskeleton-suit-is-half-way-to-iron-man/ 6/25/2013 Gerhard Fettweis Slide 24

  25. Health / Physiotherapy http://www.medindia.net/patients/patientinfo/images/physiotherapy.jpg 6/25/2013 Gerhard Fettweis Slide 25

  26. Manufacturing http://www.augsburg.de/fileadmin/www/dat/fotoservice/wirtschaft/kuka/kuka_1.jpg 6/25/2013 Gerhard Fettweis Slide 28

  27. Sports http://www.spox.com/de/sport/olympia/0807/Artikel/Terminplaene/zeitplan-kanu.html 6/25/2013 Gerhard Fettweis Slide 29

  28. Virtual Overlay http://googlesystem.blogspot.de/2009/12/google-goggles-mobile-visual-search.html 6/25/2013 Gerhard Fettweis Slide 30

  29. Smart Grid 10km – 1ms http://smartgrid.epri.com/Demo.aspx 6/25/2013 Gerhard Fettweis Slide 32

  30. Paradigm of 5G Cellular: Control 1ms Traffic / Sports / Education / Health&Care / Manufacturing / Games / Smart Grid… 6/25/2013 Gerhard Fettweis Slide 33

  31. SmartRAN Distributed Compute Within Distributed Cloud router Data Center Steering & Ctrl Center 6/25/2013 Gerhard Fettweis Slide 34

  32. Health & Care Traffic Sports Steering & Content Control Education Communications Communications Manufacturing Games Smart Grid … 6/25/2013 Gerhard Fettweis Slide 35

  33. For more on “Tactile Internet” Youtube: “ Tactile Internet Gerhard ” http://www.youtube.com/watch?v=_VXEPzQgpok Microwave Journal Dec/2012 feature article on 5G G. Fettweis A 5G Wireless Communications Vision , 2012-12-15, Microwave Journal www.microwavejournal.com/articles/print/18751-a-5g-wireless-communications-vision 6/25/2013 Gerhard Fettweis Slide 36

  34. 10ms  1ms Impact: 32 µ s Packet Software Ecosystem 100 µ s Network Hosted Sensor/ Embedded Config. Modem Modem Computing Actuator Computing Manager (decider) 100 µ s (SON) Σ = 0.2 ms Latency Goals: Air Interface Σ = 0.3 ms Σ = 0.5 ms Terminal Base Station

  35. WHICH MODULATION? 6/25/2013 Gerhard Fettweis Slide 38

  36. Background Speed of light 𝑑 = 300𝑙𝑙 / 𝑙𝑛 GSM: one GMSK symbol 3.7 𝜈𝑛 ≜ 1100𝑙 3G: one DS-CDMA chip 0.26 𝜈𝑛 ≜ 7 8𝑙 LTE: one OFDM symbol 70 𝜈𝑛 ≜ 21𝑙𝑙 6/25/2013 Gerhard Fettweis Slide 39

  37. Time-Frequency Grid of OFDM frequency time Dresden, 05 June 2013 Gerhard Fettweis Slide 40

  38. OFDMA frequency time Dresden, 05 June 2013 Gerhard Fettweis Slide 41

  39. OFDMA Highlights  Variable channel bandwidth  Scheduling & RRM  Low complexity in signal processing 6/25/2013 Gerhard Fettweis Slide 42

  40. Limitations of OFDMA  Frequency synchronous operation and limits on phase noise  Spectrum shaping: spectrum mask, spectrum aggregation, and ACLR  Symbol design limitations: Subcarrier spacing / symbol duration  ASA (Authorized Shared Access): Carrier sensing 6/25/2013 Gerhard Fettweis Slide 43

  41. Packet/Symbol Duration for 5G ∆𝑔 𝑡𝑡𝑡 = 1/ 𝑈 𝑡𝑡𝑡𝑡𝑡𝑡 A packet 𝑈 𝑞𝑞𝑞𝑞𝑞𝑞 (TTI) of max. 32 µ s and at least 10 symbols: 10 1 ∆𝑔 𝑡𝑡𝑡 ≥ = = 312. 5𝑙𝑙𝑙 𝑈 𝑞𝑞𝑞𝑞𝑞𝑞 𝑈 𝑡𝑡𝑡𝑡𝑡𝑡 6/25/2013 Gerhard Fettweis Slide 44

  42. OFDM: Phase Noise Impairing Capacity ∆ f sub sub-carrier spacing ∆𝑔 3𝑒𝑒 / ∆𝑔 𝑡𝑡𝑡 TU Dresden Gerhard Fettweis Slide 45

  43. Doppler Spread (1) 𝑤 𝑔 𝑞 𝐶 𝑒 ≅ 2 𝑙𝑙 𝐻𝑙𝑙 ℎ http://upload.wikimedia.org/wikipedia/commons/thumb/ c/c9/Dopplereffectsourcemovingrightatmach0.7.gif/220px -Dopplereffectsourcemovingrightatmach0.7.gif 4GHz carrier and 250km/h  2kHz Doppler Spread! ∆𝑔 𝑡𝑡𝑡 ≥ 200𝑙𝑙𝑙 6/25/2013 Gerhard Fettweis Slide 46

  44. Doppler Spread (2) 2kHz Doppler Spread:  approx. 500 µ s coherence time  CSI update period of 50 µ s sensible = 𝑈 𝑞𝑞𝑞𝑞𝑞𝑞 (TTI) duration 6/25/2013 Gerhard Fettweis Slide 47

  45. Delay Spread & Coherence Bandwidth coherence bandwidth ≥ 10x subcarrier spacing 𝐶 𝑞 ≥ 10 ∗ ∆𝑔 𝑡𝑡𝑡 Assuming 1km “delay spread” 𝑡𝑡𝑡 ≤ 𝐶 𝑞 1 𝑔 10 = 10 ∗ 3 𝜈𝑛 = 33𝑙𝑙𝑙 6/25/2013 Gerhard Fettweis Slide 48

  46. Summarizing Multicarrier for 5G ∆𝑔 𝑡𝑡𝑡 ≥ 200𝑙𝑙𝑙 Doppler Spread ∆𝑔 𝑡𝑡𝑡 ≤ 3 3𝑙𝑙𝑙 Coherence Bandwidth 𝑈 𝑞𝑞𝑞𝑞𝑞𝑞 ≤ 50𝜈𝑛 Coherence Time 𝑈 𝑡𝑡𝑡𝑡𝑡𝑡 ≤ 5𝜈𝑛 ∆𝑔 𝑡𝑡𝑡 ≥ 200 𝑙𝑙𝑙 ∆𝑔 𝑡𝑡𝑡 ≥ 312. 5𝑙𝑙𝑙 Latency 𝑈 𝑞𝑞𝑞𝑞𝑞𝑞 ≤ 32 𝜈𝑛  ISI on subcarriers 6/25/2013 Gerhard Fettweis Slide 50

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