IEEE 5G Summit Rio. Stepping forwards to 5G NAKAMURA, TAKAHARU FUJITSU LIMITED. Rio de Janeiro, Brazil

Transcription

1 IEEE 5G Summit Rio Stepping forwards to 5G Rio de Janeiro, Brazil November 30, 2018 NAKAMURA, TAKAHARU Principal Engineer NETWORK BUSINESS STRATEGY OFFICE FUJITSU LIMITED

2 Contents Preambles: Role of 5G / Implications of 5G / Traffic trends / Ways to improve system capacity Utilization of higher and wider spectrum: mmwave beamforming as an example / Observations on fractional band width An enabling technology: Ultra High-Density Distributed Smart Antenna Systems As additional remark on Transmission latency Conclusion: Phased approach 1

3 Market demands and Mobile Communication systems 1980s 1990s 2000s 2010s 2020s Mobile Core Network ISDN ATM IP based network Radio Access Technologies Analog cell phone systems PDC AMPS GSM (2G) IMT-2000 (3G) LTE (3.9G) LTE-Advanced (4G) 2020&Beyond ( 5G ) Market Demand Voice Call Capacity improvement Global standard + Multi-media capable IP friendly mobile ( Portable Internet) Portable Doors to Variety of Services? User channels in radio PHY Dedicated to each user Shared by plural users 2

4 4G system outlined in 2003 Ref: ITU-R Rec. M.1645 Framework and overall objectives of the future development of IMT-2000 (06/2003) 3

5 5G Radio Access Technologies foreseen in 2014 Technologies shown here may not be exhaustive and subject to further investigations Ref: "Mobile Communications Systems for 2020 and beyond", ARIB 2020 and Beyond Ad Hoc Group White Paper, October

6 The role of 5G: Bridging Digital World and Physical World Disaster Prediction Shared Experience Remote Access Smart Citizen Services Transport massive information Sensing Secure, Stable, Efficient connectivity 5G Navigation Real-time feedback Advanced analysis technique 5G ICT creates new knowledge and supports activity of humans and machines in real time, by analyzing large amounts of data in physical world. 5

7 Implications of 5G *Quality of Experience Throughput /User experience(qoe * ) Telemedicine / Remote surgery Manufacturing SNS / Video streaming Digital Signage Smart meter Connected cars Utilities Food, Agriculture Arena applications AI Sustainable Development VR / AR Smart town High speed, High capacity 5G Massive connections Low latency, Ultra reliable Number of connections / Amount of data volume 6

8 New traffic types from possible new fields Urgent: Cope with enormously increasing traffic (on going story in 4G systems) Foreseen: Fixed and Handling Mobile of communications genuine new type, Traffic genuine in Japan mobile specific traffic. X 10 within 7 years! X 100 within 14 years? X 1000 in 21 years??? Depending on Cost vs. Value provided Mobile specific traffic (Mobile specific applications) Genuine new Type Traffic Mobile specific traffic 2210Gbps 2018 Replacement of fixed (wired) communications 2210Gbps 202x Fixed comm. Alike traffic Wired comm. 2210Gbps alike 2210Gbps traffic x? Refs: "Status of the mobile communications traffic of Japan (May. 2018)," Information and Communications Statistics Database, Ministry of Internal Affairs and Communications of Japan, Jun "Aggregation and Provisional Calculation of Internet Traffic in Japan (as of May 2018)," Ministry of Internal Affairs and Communications of Japan, Aug

9 Profiles of communication traffic Annual growth ratio of communications traffic Share of mobile traffic (mobile / Total traffic) Refs: "Status of the mobile communications traffic of Japan (May. 2018)," Information and Communications Statistics Database, Ministry of Internal Affairs and Communications of Japan, Jun "Aggregation and Provisional Calculation of Internet Traffic in Japan (as of May 2018)," Ministry of Internal Affairs and Communications of Japan, Aug

10 Ways to improve system capacity 1. Improved spectral efficiency: Peak spectral efficiency: 30bps/Hz (UL), 15bps/Hz(DL) 2. Wider spectrum Utilization of SHF or EHF (up to bandwidth of several hundreds MHz) 3. Smaller cells Area traffic capacity (bps/m 2 ) should be 3 times higher than IMT- Advanced (ITU-R Rep. M.2134) 10

11 Utilization of higher and wider spectrum - implementation aspects - 11

12 Number of frequency bands specified in 3GPP Sources: 3GPP TS25.101, User Equipment (UE) radio transmission and reception (FDD), (Dec Dec. 2017). 3GPP TS25.102, User Equipment (UE) radio transmission and reception (TDD), (Dec Dec. 2017). 3GPP TS , Evolved Universal Terrestrial Radio Access (E-UTRA); User Equipment (UE) radio transmission and reception, (Oct Dec. 2017). 3GPP TS , NR; User Equipment (UE) radio transmission and reception; Part 1: Range 1 Standalone, (Dec. 2017). 3GPP TS , NR; User Equipment (UE) radio transmission and reception; Part 2: Range 2 Standalone, (Dec. 2017). 12

13 Number of CA combinations specified for LTE-Advanced Source: 3GPP TS , Evolved Universal Terrestrial Radio Access (E-UTRA); User Equipment (UE) radio transmission and reception, (Oct Dec. 2017). 13

14 Utilization of single contiguous wide bandwidth spectrum Carrier Aggregation (LTE-Advanced) (Combining multiple component carriers) Single contiguous wide bandwidth carrier 14

15 Operation of New RAT above 6GHz Channel susceptible to shadowing, large penetration loss Beamforming gain and diversity to compensate the large path loss Potentially high device cost/complexity and power consumption Limited mobility and cell/beam discovery/tracking Features for above 6GHz (up to 100GHz) Dual connectivity SCell (First priority) Standalone operation should also be supported LTE New RAT New RAT+ (Def by WRC19) f ~2GHz BW Support of multiple radio interface parameters for future proofing and optimization for different scenarios (e.g. Indoor/outdoor, frequency bands, fronthaul/backhaul applications) Beam-space multiplexing of multiple TX signals Analog/digital hybrid beamforming Low power consumption & cost One analog beam serves multiple UEs Beam-space + site diversity to compensate shadowing 15

16 Carrier frequency vs. bandwidth specified for LTE and NR Ref: 3GPP TS , "E-UTRA; User Equipment (UE) radio transmission and reception" (V ) GPP TS , "NR; User Equipment (UE) radio transmission and reception; Part 1: Range 1 Standalone" (V ) GPP TS , "NR; User Equipment (UE) radio transmission and reception; Part 2: Range 2 Standalone" (V )

17 Millimeter wave technologies 70GHz Vehicle Radar, E-band(70/80GHz) Wireless transport system 28GHz Wireless equipment (under development) 70GHz Vehicle Radar 70GHz/80GHz E-band wireless transport system Millimeter waves Frequency Beam forming 28GHz Wireless system 17

18 Hybrid beam forming with reduced power consumption 2A = (A+B) + (A-B) 2B = (A+B) (A-B) A B A B Schema D/A D/A D/A D/A D/A D/A Signal 信号処理 processing D/A D/A A+B D/A D/A A-B A B A B Inter サブアレー間符号化 sub-array coding A B Type Full Digital beam forming Sub-array with hybrid digital/analog weight control Simple sub-array config. Inter sub-array coding DACs 6 2 (with 6 analog phase sifters) Beam forming 6 antennas/beam 3 antennas/beam (3 antennas 2 sets)/beam Ref: Y.Ohashi et.al, "4 beam multiplexing 10Gbps millimeterwave communication with inter-subarray coding interleave beamforming," IEICE Tech. Rep. RCS (Nov. 2017). 18

19 Inter-leaved sub-arrays Phase=0 Phase=0 v i θ m = K 1 k=0 w i+km exp j2π d λ i + km sin θ m = K 1 k=0 exp j2π d i + km sin θ λ m sin θ 0 = Kexp j2π im M v i θ m : Array factor w i+km : Antenna weight θ 0 : Main lobe direction M: Number of sub-arrays K: Number of elements per array where sin θ i sin θ m = m λ Md D / A A Phase=0 D / A A D / A B Phase=180 D / A B Ref: Y.Ohashi et.al, "4 beam multiplexing 10Gbps millimeterwave communication with inter-subarray coding interleave beamforming," IEICE Tech. Rep. RCS (Nov. 2017). 19

20 Inter-leaved antenna array Antenna array configuration: 16 arrays (8 arrays 2 sets) Horizontal beam steering 8-ch phased array chip 2 Millimeter Wave Frequency Conversion DAC 58mm Phased Array Chip 33mm 16 Array Antennas 0.7λ Phased Array Chip Antenna board (60GHz) Millimeter Wave Frequency Conversion DAC Ref: Y.Ohashi et.al, "4 beam multiplexing 10Gbps millimeterwave communication with inter-subarray coding interleave beamforming," IEICE Tech. Rep. RCS (Nov. 2017). 20

21 Antenna beam patterns Item RF carrier frequency Bandwidth Modulation OFDM symbol interval Bit rate Number of beams Parameter 60.5GHz 1.08GHz BPSK / QPSK / 16QAM µsec 2.53Gbps/beam 4 (max) Single sub-array TX (Bore sight=18 ) Interleaved 2 sub-array TX (Bore sight=18 ) Ref: Y.Ohashi et.al, "4 beam multiplexing 10Gbps millimeterwave communication with inter-subarray coding interleave beamforming," IEICE Tech. Rep. RCS (Nov. 2017). 23

22 An enabling technology Ultra High-Density Distributed Smart Antenna Systems 24

23 Prob 見通し確率 of LOS [%] Ultra High-Density Distributed Smart Antenna Systems Ultra High-Density Distributed Smart Antenna Systems BS-BS distance < 100m (Outdoor: ~several 10m, Indoor: ~ Several meters) Propagation characteristics Line of sight propagations Inter BS distance Inter BS distance [m] # of BSs [BSs/km 2 ] Stable and high quality communications Higher inter-cell interference Utilizing inter BS coordinated transmission at cell edge areas Enabling technologies Inter cell coordinated beam forming Combination of distributed and concentrated antenna deployment Urban Micro (UMi) Model (3GPP TR36.814) 端末 BS-UE - 基地局間距離 distance [m] 25

24 Distributed Smart Antennas Flexible BS configurations Flexible BS configurations allow flexible beam forming design with proper number of BSs depending on deployment scenarios. Clustered BS units High antenna gain with beam forming using clustered antennas. (RRH) Distributed BS units Cope with obstacles (Human bodies, trees, buildings) with distributed antennas. 26

25 Ultra High-Density Distributed Smart Antenna Systems TP Virtual cells CBBU Ultra High-Density Distributed Antenna Systems Ref: 5G R&D Activities for High Capacity Technologies with Ultra High-Density Multi-Band and Multi-Access Layered Cells, IEICE RCS (Dec. 2015) Field Trial of Ultra High-Density Distributed Antenna Systems for 5G Ref: Fujitsu Launches Field Trial of Ultra High-Density Distributed Antenna Systems for 5G, Press release of Fujitsu, (Nov. 2017) [ 27

26 Ultra low latency data transmission - An additional remark - 28

27 [Ref] The Tactile Internet Exemplary latency budget of a system of the Tactile Internet Ref: The Tactile Internet, ITU-T Technology Watch Report, Aug

28 Consideration: Geographically localized network services 18,553km 10 8 m/s) 18,553km (62ms@ m/s) Tokyo centered The other side of the globe Azimuthal equidistant projection Rio de Janeiro centered Ref: Nakamura. T, Radio Access Network Technologies for 5G,IEICE Soc. conf (Sep. 2015), P. Wessel, W. Smith, A global self-consistent, hierarchical, high-resolution shoreline database, Journal of geophysical research, Vol. 101, No. B4, pp (Apr. 1996) 30

29 Lower bound of propagation delay vs. distance Propagation delay at speed of light Ref: "Embarking on Mobile Communications systems for 2020 and beyond," Proc IEICE General Conference, TK-3-4, SSS-9, Mar (in Japanese).) 31

30 Consideration: Geographically localized network services 100km 10 8 m/s) 100km (0.3ms@ m/s) Tokyo centered Rio centered Azimuthal equidistant projection (Partial log scale) Ref: Nakamura. T, Radio Access Network Technologies for 5G,IEICE Soc. conf (Sep. 2015), P. Wessel, W. Smith, A global self-consistent, hierarchical, high-resolution shoreline database, Journal of geophysical research, Vol. 101, No. B4, pp (Apr. 1996) 32

31 Phased approach - Conclusion remarks - 33

32 5G RAT and LTE Evolution (Phased approach) 5G Phase-1 (To be deployed in 2020) New RAT (up to 30GHz) Mainly for embb Massive MTC, Ultra reliable MTC E2E latency reduction Flexible TDD Enhancements for UDN Forward/ Backward compatibility 5G Phase-2 (To be deployed in 2022~2023) Extension of BW using new spectrum above 6GHz (New RAT up to 100GHz, BF/MIMO) Support of full-duplex operation (mmwave) wireless back/fronthaul Tight interworking LTE Evolution embb elaa for 5GHz unlicensed Flexible duplex (FDD) WiGig aggregation MUST Latency reduction, V2X, LTE Evolution continues Ref: R&D activities towards 5G in Fujitsu, Multimedia Promotion Forum, presentation #678, (Oct. 2015) Technologies for LTE evolution can also be used also for 5G new RAT. So, the above classification may not be strictly followed. 34

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