Funktechnologien für zukünftige Mobilfunksysteme nach LTE - PDF

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Vodafone Chair Mobile Communications Systems, Prof. Dr.-Ing. G. Fettweis Funktechnologien für zukünftige Mobilfunksysteme nach LTE Gerhard Fettweis Vodafone Chair TU Dresden Germany Chair and Its Partners

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Vodafone Chair Mobile Communications Systems, Prof. Dr.-Ing. G. Fettweis Funktechnologien für zukünftige Mobilfunksysteme nach LTE Gerhard Fettweis Vodafone Chair TU Dresden Germany Chair and Its Partners 25 Ph.D. students 25+ Ms students 3 sen. scientists 1 post-doc 1 professor 1 project mgr 2 secretaries 2 system adm. Sponsors TM Projects Startups/Spinouts IPP Sep freedelity 2007 TU Dresden, Gerhard Fettweis Slide 2 Vodafone Chair Mobile Communications Systems, Prof. Dr.-Ing. G. Fettweis The Wireless Data Communications Roadmap Single-Chip Flash: Embedded in Gadgets 1GB 2GB 4GB 8GB16GB 32GB 64GB128GB 256GB ITRS Roadmap: 10x every 5 years, secured until TU Dresden, Gerhard Fettweis Slide 4 Application examples I PDA and cell phone synchronization Printing from a mobile platform (notebook PC, PDA, memory stick etc.) Data updating via handheld or PC tablet in medical, manufacturing or retail Wireless connections of consumer electronics: TV receivers, DVD players, ipod devices, TV tablets, digital cameras, camcorder, beamer etc. TU Dresden, Gerhard Fettweis Slide 5 Sync-Time Over Wireless USB at 120Mb/s 2GB 1GB 3min 1.5min 64GB 128GB 256GB 32GB 3h 20min 16GB 50min 8GB 4GB 12min 6min Unlimited demand for communications bandwidth TU Dresden, Gerhard Fettweis Slide 6 Data Synchronization: Point-to-Point 100G 10G 1G USB 2.0 UWB intention USB c Short links (1m) 100M 10M 1M USB K 10K TU Dresden, Gerhard Fettweis Slide 7 Client-Server Scenarios OFFICE HOME Productivity Ethernet Access Point (802.11) Wireless Router (802.11) BB Modem (Cable/DSL) HOME Entertainment TU Dresden, Gerhard Fettweis Slide 8 Client Server Applications: WLAN 100G 10G 1G 100M ag n ? Short links (1m) WLAN (10m) 10M b 1M 100K K TU Dresden, Gerhard Fettweis Slide 9 Wide Area Network: Coverage Challenge AWAY Cellular (2.5G/3G/B3G) TU Dresden, Gerhard Fettweis Slide 10 Coverage: Cellular 100G 10G 1G Short links (1m) WLAN (10m) 100M 10M 1M HSDPA HSPA WiMAX Cellular (100m) LTE 100K 3G R99 / EDGE 10K GSM GPRS TU Dresden, Gerhard Fettweis Slide 11 Comparison 100G 10G 1G 100M 10M 1M 100K 10K 10x 100x Short links (1m) WLAN (10m) Cellular (100m) TU Dresden, Gerhard Fettweis Slide 12 The Wireless Roadmap 100G 10G 1G 100M 10M 1M 100K 10K 10x 100x Short links (1m) WLAN (10m) Cellular (100m) ITRS Roadmap: Continues until 2025 Driven By Moore s Law TU Dresden, Gerhard Fettweis Slide 13 Vodafone Chair Mobile Communications Systems, Prof. Dr.-Ing. G. Fettweis The New Channel : Dirty RF GSM: Speed of Light is Slow GSM: 5km path length difference!! Up to 5 old symbols interfere!! TU Dresden, Gerhard Fettweis Slide 15 3G/UMTS: Speed of Light is Extremely Slow 3G: 5km path length difference!! Up to 500 old symbols interfere!! TU Dresden, Gerhard Fettweis Slide 16 LTE: Speed of Light is OK!!! LTE: 5km path length difference!! ZERO old symbols interfere!! TU Dresden, Gerhard Fettweis Slide 17 Method of Wireless Transmission TU Dresden, Gerhard Fettweis Slide 18 Dirty RF: The Channel Challenge Picking up dirt Nonlinear PA Nonlinear LNA Feedthrough Coupling Phase noise Aperture Jitter Ambiguity I/Q Imbalance RRC mismatch Flicker Noise Digital noise DSP: Living With Dirty RF TU Dresden, Gerhard Fettweis Slide 19 Phase Noise: A Channel Challenge Picking up dirt Nonlinear PA TU Dresden, Gerhard Fettweis Slide 20 One Outcome of Dirty RF Concept: Coping With Phase Noise Classical solution: Phase noise should be uncorrelated on each branch Separate oscillators help improve performance M antennas M x RF complexity Dirty RF solution Phase noise should be correlated on each branch to improve tracking performance Single oscillator preferred M antennas M x RF signal chain complexity increase only ~ A/D & A/D & BB BB ~ Signal Processing ~ Signal Processing TU Dresden, Gerhard Fettweis Slide 21 Vodafone Chair Mobile Communications Systems, Prof. Dr.-Ing. G. Fettweis Cellular: Enablers for Roadmap The General Communications Problem Simplified Interference Distortion Channels Electronics Noise Transmitted desired signal Received signal Quality measure: Signal to Interference and Noise Ratio (SINR) Data Rate: Function of SINR TU Dresden, Gerhard Fettweis Slide 23 Fairness High SINR High data rate Low SINR Low data rate High SINR High data rate enodeb Unfair!!! enodeb TU Dresden, Gerhard Fettweis Slide 24 Fairness: GSM SINR Distribution GSM Worst case system design Waste of SINR/data rate But: very fair GPRS and EDGE Based on SINR distr. Higher spectral efficiency But: tendency unfair Exploring the boundaries SINR distribution? Interference reduction imprtant! Practical implementation how? PHY proposals From Ericsson review 3/1999, and Furuskar, A.; Mazur, S.; Muller, F.; Olofsson, H.: EDGE: enhanced data rates for GSM and TDMA/136 evolution, IEEE Pers. Comm., vol. 6, No. 3, June 1999, p TU Dresden, Gerhard Fettweis Slide 25 Frequency Planning within GSM cell Cluster of 7 cells Frequency Reuse: 7 Interference Avoidance through Frequency Reuse 1 TU Dresden, Gerhard Fettweis Slide 26 Drivers of Spectral Efficiency Modulation Spectral Efficiency Channel Coding Physical Layer Spectral Eff. Sync., Channel Estimation Physical Layer Net Eff. MAC Protocol, Signaling Link Layer Net Eff. Frequency Reuse System Spectral Efficiency Strongest Levers 1.35 bits/s/hz 0.77 bits/s/hz 0.56 bits/s/hz 0.50 bits/s/hz 0.1 bits/s/hz/cell GSM Network TU Dresden, Gerhard Fettweis Slide 27 Fairness Challenges 0.5 pdf of SIR Network not links 0.4 Billing PHY SIR distribution Billing models Usage models Reuse 1 Power Control E[SIR] = -0.2dB Reuse 1 Power Control 10 Interferers cancelled Macro/Distributed MIMO E[SIR] = 8.1dB Interference Cancellation: Farness & High Data Rate fairness SIR in db TU Dresden, Gerhard Fettweis Slide 28 Limits in Clustered Virtual MIMO A Graph Theory Approach We can easily observe how many interferers would have to be perfectly cancelled for a user at any location within a cell, to achieve a capacity target: Target 3 bit/s/hz Target 4 bit/s/hz Note that we are assuming perfect interference cancellation (optimistic), but do not take into account increased diversity (pessimistic) TU Dresden, Gerhard Fettweis Slide 29 Spectral Efficiency Challenges Network not links Fairness Cost (Capex/Opex) Usage models ,1 0,3 0,5 1,2 GAP GSM EDGE HSPA LTE EASY- C 3 10 Theory Spectral Efficienncy bit/s/hz/cell 20 YEARS Of Engineering further YEARS Of Engineering ? TU Dresden, Gerhard Fettweis Slide 30 Vodafone Chair Mobile Communications Systems, Prof. Dr.-Ing. G. Fettweis Coverage: Cooperative Relaying Direct Transmission TU Dresden, Gerhard Fettweis Slide 32 Relaying TU Dresden, Gerhard Fettweis Slide 33 Cooperative Relaying TU Dresden, Gerhard Fettweis Slide 34 Relaying: The Problem Orthogonality Principle: A receiver must be shut-down during transmission at same frequency Need to double the link-bandwidth! TU Dresden, Gerhard Fettweis Slide 35 Results Base urban case (EU WINNER project scenario) Advantage: Coverage TU Dresden, Gerhard Fettweis Slide 36 Results Base urban case (EU WINNER project scenario) Advantage: Coverage TU Dresden, Gerhard Fettweis Slide 37 Vodafone Chair Mobile Communications Systems, Prof. Dr.-Ing. G. Fettweis Testbed for LTE & Beyond EASY-C Testbed Setup Dresden Altstadt T-Mobile Sites 5 Vodafone Sites Dresden 1 Mitte Phase 1: Q Dresden Altstadt 1033 Dresden Altstadt 1032 Dresden 104 Phase 2: Q Phase 3: Q Hauptbahnhof Hbf-Süd Fr.-Förster-Platz Leneplatz For the links between sites: Motorola Canopy Microwave links 5.4 GHz, 300 Mbit/s half-duplex 1μs link latency TU Dresden, Gerhard Fettweis Slide 39 Cellular After 3G: Coordinator: Gerhard Fettweis Up to now: Links Today: Interfering Stations 47+ Mio Tomorrow: Collaborating Networks Testbed Dresden Dresden Altstadt 1130 Dresden 1 Mitte WTC Karstadt Dresden 104 Hauptbahnhof of Leneplatz Hbf-Süd Fr.-Förster-Platz ICC 2009 Dresden TU Dresden, Gerhard Fettweis Slide 40 LTE Network Within Silicon Saxony TU Dresden, Gerhard Fettweis Slide 41 IEEE ICC 2009 June Dresden, Germany Joint the ICC 2009 at Dresden, June : ICC 2009 will support about 180 sessions of 5 papers each, 10 Tutorials, 4 Workshops and an integrated exhibition area With about 1500 expected participants it is the flagship conference of the IEEE Communication Society General Chair: H. Akhavan TPC Chair G. Fettweis We are looking forward to seeing you on the IEEE ICC 2009! IPP Vodafone Chair Mobile Communications Systems, Prof. Dr.-Ing. G. Fettweis Cellular Terminal The Best or Worst of Engineering? Innovation?! TU Dresden, Gerhard Fettweis Slide 44 2004: Integration Nightmare Roadmap of Wireless Standards into Handsets Status Today + NFC + WiFi g + DVB-T/H + WiFi b + FM Radio GSM/UMTS Bluetooth IrDA Galileo + WiFi n + ZigBee + UWB Wireless USB + WiMax + MediaFlo + GPS WiFi IEEE b: 11Mb/s wireless 2.4GHz (up to 100m) IEEE a/g: 54Mb/s wireless 2.4/5GHz (up to 100m) IEEE n: 250Mb/s wireless 5GHz (up to 30m) UWB (IEEE a): 480Mb/s wireless USB2.0 (typ. 1m) WiMax (IEEE d/e): ~10Mb/s broadband wireless access NFC: Near Field Communications (RF-ID, wireless payment, ) ZigBee: (IEEE ) Sensor networks, remote control Bluetooth Version 2: TBD? TU Dresden, Gerhard Fettweis Slide 45 2007: Integration Cleanup Roadmap of Wireless Standards into Handsets Status Today + WiMax GSM/UMTS Bluetooth IrDA FM Radio WiFi bg GPS + Galileo + WiFi n + UWB Wireless USB Status Tomorrow LTE / WiMAX UWB+ (GPS/Galileo) (WiFi ) - FM Radio - BlueTooth - IrDA Never made it: MediaFlow DVB T/H NFC ZigBee TU Dresden, Gerhard Fettweis Slide 46 Mobile Devices: It s About Graphics TU Dresden, Gerhard Fettweis Slide 47 Mobile Devices Challenges Low power Reliability Casing Modular Flex. Mech. Flexibility Memory Flash, DRAM HDD Audio etc. Audio I/O Sensors Security Apps SW platform Programming models OS & RTOS Cellular Pipe 2G, 3G, LTE WiMAX Apps Engine Graphics -Multimedia - Display Screen Projection System partitioning Role of cellular?!!! Antennas MIMO Multiband Multistandard Connectivity UWB++, GPS, BT, WLAN, DxB Energy Battery Scavenging TU Dresden, Gerhard Fettweis Slide 48 Vodafone Chair Mobile Communications Systems, Prof. Dr.-Ing. G. Fettweis Data Volume Driver: 3D Internet Data Delivery: Incearing Amount of Animated 3D Graphics 3D graphics, e.g.: Triangles Positioned in space With texture Viewpoint Object selection Projection Vase: FHG HHI Berlin TU Dresden, Gerhard Fettweis Slide 50 Next generation Internet/ 3D Internet Internet-related technology enablers 3D Internet/ 3D Graphics new demand for processing power, graphics engines, bandwidth... Future of IP New charging and business models Editorial requirements, user generated content FHG HHI Berlin MPI Saarbrücken TU Dresden, Gerhard Fettweis Slide 51 3D Graphics in A Network Mobile Switching Center Storage Center Server Farm Where to place which part of graphics content & processing??? How to optimize the communications challenge: rate & latency??? TU Dresden, Gerhard Fettweis Slide 52 Vodafone Chair Mobile Communications Systems, Prof. Dr.-Ing. G. Fettweis Conclusions The Wireless Roadmap 100G 10G 1G 100M 10M 1M 100K 10K 5 & 6GHz Multi-Beam Steering Antenna Array Concepts Pragmatic Analog & Dirty RF 10x 100x Dirty RF 100GHz On-Chip Antenna Arrays New Materials & Devices Short links (1m) WLAN (10m) Cellular (100m) Driven By Moore s Law & 3D Internet Distr./Network MIMO 4GHz, VHF Beam Steering Interference Mgmt TU Dresden, Gerhard Fettweis Slide 54 Conclusions LTE is not the end of development 10bit/s/Hz/cell spectral efficiency theoretically feasible (100x GSM!!!) Test bed in Dresden (www.easy-c.com) Signal processing required: At least 10x LTE Substantial fairness increase possible Terminals: Leaner, but graphics & multimedia centric Living with analog impairments ( dirty RF ) Graphics: The main drivers for internet traffic? Need new data distribution beyond MPEG-4 Need new 3D wireless IP protocol? TU Dresden, Gerhard Fettweis Slide 55 Application Driven Cellular 2G 3G 4G Voice Messages + Data + Broadband data + Positioning 5(?)G + 3D Graphics & 3D multimedia TU Dresden, Gerhard Fettweis Slide 56 Vodafone Chair Mobile Communications Systems, Prof. Dr.-Ing. G. Fettweis Thanks! Thank you Vodafone Group R&D for the continued support of the
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