Next Generation Wireless Access for 5G - Motorola
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This document discusses next generation wireless access beyond 5G. It notes that LTE has been very successful but demand for mobile data is increasing rapidly. New opportunities exist in areas like vehicles, smart homes/cities, healthcare and factories. However, a key challenge is projected spectrum may not meet demand. The document discusses potential technologies for next generation wireless including millimeter wave spectrum, massive MIMO, new waveforms, flexible frame structures and network architectures. The goal is to support higher data rates everywhere with more efficient use of resources and support for new services and low latency applications. Standardization of next generation wireless is planned to start in 2016.
Next Generation Wireless Access for 5G - Motorola
- 1. 1Next Generation Wireless RWS-150002 Views on Next Generation Wireless Access 3GPP RAN Workshop on 5G, Sep 2015 Lenovo, Motorola Mobility
- 2. 2Next Generation Wireless Where are we • LTE is a mega success…422 operators, 143 countries – and growing • Constant enhancements from Rel-8 • MIMO – up to 8 spatial layers; FD-MIMO • Densification - eICIC , Small Cells • New topologies – D2D, Dual Connectivity • Unlicensed spectrum operation • MTC with improved coverage • Remarkable connectivity growth… • LTEA/LTE/HSPA/UMTS/EDGE GPRS/GSM and 802.11a/b/g/n/ac • … time to explore next generation (NG) of connectivity • LTE a mega success…422 operators, 143 countries and growing 2005 2010 2015 2020+ ? GSM/GPRS/EDGE HSPA LTE HSPA 802.11b/g 802.11n LTE HSPA 802.11b/g 802.11n LTE-A 802.11ac GSM/GPRS/EDGE GSM/GPRS/EDGE availability rate
- 3. 3Next Generation Wireless New Opportunities • Demand for mobile broadband continues to proliferate • More consumers … • LAM, CEMA, APAC • … and more data per consumer • WE, NAM • Increasing demand for driving mobile broadband technologies into new markets • Automobile incl. v2x, • Smart/connected homes/cities/infrastructure • Healthcare, • Factory automation • Drones, OTT >150x Smartphone Data Traffic increase by 2020 vs. 2010 • 20102015 (30x): LTE + HSPA + WiFi offloading • 20152020 ( 6x ): LTE, Densification, offloading, S.E., CA • 20202025 ( 6x ): Spectrum, Flexible Network … • Mobile wireless demand managed via throttling, pricing, offloading, & network/spectrum expansion & S.E. gains
- 4. 4Next Generation Wireless Spectrum • Biggest challenge - projected spectrum not meeting demand • New spectrum allocations: • WRC-15 (<6GHz) pushback from satellite, broadcast, automotive industries • WRC-19 (>6GHz) must target specific NG band(s), preferably harmonized global band • Lower millimeter wave band (27-45 GHz) - promising for NG • Large bandwidth, compact antenna arrays - but engineering & supply chain challenges • 28 GHz and 38 GHz potential NG global bands. Promote 100MHz+ allocations. • Regulatory policies changing to accommodate demand • Shared Access – but geographical region limited – FCC’s 3550-3700 MHz band • Licensed, unlicensed, & hybrid shared models proposed for higher frequency bands • NG should support all models of spectrum access
- 5. 5Next Generation Wireless New Technology Adoption …time to explore next generation of technologies • mmWave, massive MIMO, very large BWs • new Waveforms • full duplex • more flexible radio interface • native support for unlicensed spectrum • including in mmWave bands • network coding • integrated wireless front/backhaul support • new network architectures • centralized operation support • … Behrouz Farhang-Boroujeny , “OFDM vs. Filter Bank Multicarrier” IEEE 2011 Hong et al, “Application of self-interference cancellation in 5G and beyond” IEEE Communications Magazine, Feb. 2014
- 6. 6Next Generation Wireless Next Generation Targets • Consumers • Higher data rates • “50 Mbps everywhere” • Ubiquitous support for real-time voice/video • Operators • Agile network for diverse services • Easy deployment / upgrades • Improved resource utilization • Reduced maintenance cost • Infrastructure/Industry • Massive, low cost, low energy IoT • CIoT as baseline for NG IoT • Ultra low latency, high reliability IoT
- 7. 7Next Generation Wireless Waveforms • Candidates • OFDMA/SC-FDMA • per-subcarrier (FBMC, GFDM) or subcarrier group (UFMC) filtering using linear/circular conv. • OFDMA/SC-FDMA • Best suited for large contiguous bandwidth carriers • S.E. improvements via CP selection & RF filtering (improved BW occupancy) • New Waveforms should show clear benefits • OOB emissions • MIMO integration, pilot generation • Waveform PAPR/CM esp. for UL & higher-frequency bands • Spectral efficiency, time/frequency sync robustness • Potential use cases for new waveforms • Fragmented and shared spectrum access • Applications with relaxed synchronization constraints
- 8. 8Next Generation Wireless Numerology • Flexible Frame Structure • ~0.25 ms subframe; Variable TTI; Reduced RTT; • Sub-6GHz • New subcarrier numerology should show clear benefit • OFDMA/SC-FDMA, OFDMA/OFDMA likely candidates • Lowest BW supported: 5/10 MHz; CIoT: < 5MHz • 6GHz - 30GHz • OFDMA/SC-FDMA, OFDMA/OFDMA likely candidates • Lowest BW supported: ~100 MHz • Common numerology with ‘above 30GHz’ • Above 30GHz • LTE subcarrier spacing not suitable due to phase noise • SC-FDMA is a likely waveform candidate • Low cubic metric waveform/modulation important Sample numerologies
- 9. 9Next Generation Wireless MIMO • Sub-6GHz • Leverage continued evolution of 4.5G MIMO techniques • Optimization without constraint of backward compatibility • > 6 GHz • Mature channel models needed for accurate design & performance evaluation • Practical beamforming design impacts multiple access & waveform choices • Waveform orthogonality allows low complexity BF design • Large BWs downplay need for higher rank • Fast beam tracking and handover techniques Not Mobile Massive MIMO
- 10. 10Next Generation Wireless Not just PHY OPEX and other considerations • Flexible Network architecture • Control and User plane split • Connection-less operation • Energy efficiency • Multi-connectivity • multi site • multi RAT Based on METIS 2020, D6.4, 2015
- 11. 11Next Generation Wireless Work Plan Rel-13: Channel modeling for mmWave (Start November 2015) Rel-14: Study item for NG begins 2Q2016 in WGs • RAN Level SI can start 1Q2016 to discuss Requirements & Deployment Scenarios • Includes mmWave Rel-15: RAN Work Item for NG begins 3Q2017 • NG specification 1st release 4Q2018 • ITU-R initial proposal 2Q2019 Rel-16: NG specification 2nd release 4Q2019
- 12. 12Next Generation Wireless Summary Connectivity beyond LTE driven by non-traditional use-cases, increased capacity, increased user data rate, and reduced cost expectations Capacity tools need to be renewed for 2020+: More spectrum, very large bandwidth, new network architecture, massive MIMO Focus on both Radio and Network Architecture flexibility to drive down cost and better address new markets and use cases. Achieving “50 Mbps everywhere”1 Requires >100 MHz of spectrum with LTE. Much less if heterogeneous. NG to reduce large spectrum bandwidth needed and reduce heterogeneous cost mmWave + very large bandwidth + massive MIMO 1 gigabyte/sec Compelling - but addressing engineering, spectrum, & supply chain issues is key 1 400 connections per sq.km in homogeneous macro network; 20Gbps/sq.km traffic density; minimum 50Mbps user rate