5g next-generation mobile communications system 5g · pdf file1980s 1990s 2000s 2010s 2020s....
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Next-generation Mobile Communications System 5G
5G
Evolution of mobile technology
1980s 1990s 2000s 2010s 2020s
1G Analog
3G IMT-2000
4G IMT-Advanced LTE-Advanced
5G
2G Digital
LTE
IMT-Advanced LTE-Advanced
IMT-2000
Steady evolution toward higher capacity
and data rates
Communications in 2020 and beyond
Multiple personal devices
Transportation (Car/Bus/Train)
Consumer electronics
Watch/jewelry/ cloths
House Sensors Cloud computing
Video streaming
New types of terminal/HI
Healthcare Education
Safety and lifeline system
4K
Everything connected by wireless
Extended and enriched wireless services
5G target performance 5G radio access will provide a total solution for a w ider range of requirements in 2020 and beyond
Higher data rate Reduced latency
Massive device connectivity
Energy savings & cost reductions
• 100x more connected devices (e.g., Crowded areas, M2M services)
• Energy savings for NW & terminals • Reduced NW costs, incl. backhaul
Higher system capacity
• RAN latency : < 1ms
• 1000x capacity/ km2
5G • Typical data rate: 100x faster (Peak data rate: > 10Gbps)
Time Plan for 5G and 5G+ 2014 2015 2016 2017 2018 2019 2020 202x
WRC15 WRC19
Rel. 13 Rel. 14 Rel. 15
5G launch
Requirements
Workshop Proposals Specifications
5G+ launch
Channel Model SI
Commercial system development for 5G in 2020
Rel. 16
Technology SI Requirement SI
WIs WIs
WIs
eLTE+5G New RAT
5G Evolution for 2020 and beyond
2020 2025 2030
5G+ 5G
5G will evolve by incorporating new freq. bands and technologies in 2020 and beyond Future compatibility is key for system design to continue evolutions
Freq.
More higher & wider freq. bands
More advanced technologies (e.g., Massive MIMO with higher number of antenna
elements)
Peak: Several Gbps Peak: Above 10Gbps
・ Existing frequency bands ・ New bands licensed by 2019 ・ Unlicensed bands
Introduction of 5G New RAT +New bands licensed after 2020 (Tight interworking with LTE)
eMBB and New Use Cases
5G in 2020 5G+ in 202X
eMBB
Massive MTC
Critical MTC
eLTE New RAT
eMBB
Massive MTC
Critical MTC
eLTE New RAT
Low latency
New RAT will mainly focus on eMBB
New RAT will be enhanced for all use cases
5G will support both eMBB and MTC use cases together with LTE evolution
New RAT
Massive MIMO/ beamforming
Cell range extension
Improved spectral efficiency
Well localized waveform
Frequency
Time
New numerology with shorter TTI
Wider bandwidth and low latency
LTE
New RAT f
t
Lean radio frame Less inter-cell interference,
energy saving, good forward compatibility
5G 5G 5G 5G 5G
5G 5G +
5G 5G ++
5G +
5G (2020)
5G (202X)
Tight LTE integration
Flexible duplex with unlicensed spectrum
(e.g. LTE-assisted access) Licensed
Band (LTE)
Unlicensed Band
(New RAT) f
C/U-plane split (dual connectivity, CA)
eLTE/ new RAT (C/U-plane)
New RAT (U-plane)
NOMA on LTE Further cellular
enhancement with massive connectivity
Intentional non-orthogonality
f NOMA
f OMA
IoT related LTE enhancements
Low cost / Long battery life devices
5G Key Technologies for 2020 Deployment
5G Trials in DOCOMO with Global Vendors 5G experimental trials are being started since Q4 of 2014
Existing Frequency Bands Wideband Transmission Over Higher Frequency Bands
Frequency
Low SHF 3-6GHz
High SHF 6-30GHz
EHF > 30GHz
UHF Ex. 800MHz, 2GHz
New radio interface
concept and massive MIMO
Super-wideband single
carrier transmission
and beamforming
(and experiments below 6GHz)
Super-wideband
hybrid beamforming and beam tracking
Time-domain beamforming
with very large number of antennas
Coordinated scheduling for super
dense base stations
using RRH
Beamforming with channel reciprocity
and advanced multiple access
Multi-beam multiplexing
for vary large
number of antennas
5G handset chipsets to support various 5G
use cases
Enhanced MBB with small and low power
consumption 5G device
Radio propagation measurement in EHF
band
OTA test & measurement for
massive MIMO in high spectrum bands
Multi-frequency-band/RAT control and 5G system
solution
Experiments on 5G devices Experiments on 5G system solution
Experiments on 5G T&M instruments
Experiments on new radio access technologies
Experimental trials on DOCOMO proposed NOMA and channel sounder to explore higher frequency bands are also conducted
Existing bands Exploitation of higher frequency bands
Frequency
Low SHF bands 3-6GHz
High SHF bands 6-30GHz
EHF bands > 30GHz
UHF bands Ex. 800MHz, 2GHz
5G Experimental Trials
NOMA Channel sounder to explore
higher frequency bands
5G Trial docomo x Ericsson (15 GHz)
Massive-MIMO antenna
BS Antenna Unit
UE #1
UE #2
5G Trial docomo x Ericsson (15 GHz)
100m
120m
BS Antenna Unit
UE #1
UE #2
5G Trial Ultra-wideband mmW System
....
UD AP
Beam visualization
server
Beamforming & tracking using 64 candidate beams
・AR Image data
Left and right cameras with HMD (Head Mount Display)
・Image data from cameras ・Position data from HMD
Beam visualization system using AR(developed by NTT DOCOMO)
5G millimeter-wave PoC system (collaboration with Nokia)
Real-time beam information is added
Feedback
Monitoring
Information of current beam ID
Best beam
You can “see” the 5G radio wave and how a highly directional and attenuated radio wave signal can follow the User Device
Center frequency: 73.5 GHz System bandwidth: 1 GHz
Throughput: more than 2 Gbps
Live demo
Distance property of the throughput (Street canyon/Shopping mall)
LOS and NLOS (Roppongi, Tokyo)
LOS (Minatomirai, Yokohama) 0 50 100 150 0
0.5
1
1.5
2
2.5
Distance from AP (m)
Thro
ughp
ut (G
bps)
Successfully Conducts 5G Trials @ 73 GHz in Actual-use Environments
AP
100 m
50 m
UD
AP
100 m 50 m 150 m
Street canyon
Shopping mall 0 50 100 150 0
0.5
1
1.5
2
2.5
Distance from AP (m)
Thro
ughp
ut (G
bps)
NLOS LOS
Dynamic virtual cell • Super high-dense deployments • Flexible cell/antenna configurations • Coordinated scheduling
Collaboration with Fujitsu
1 unit 3 units 6 units 8 units
Flexible configuration Dynamic virtual cell
2 Rx antennas/UE 24 UEs
UE#24
UE#1
64 Tx antennas (8H x 4V x 2 (X-pol))
Large scale TDD Massive MIMO
Massive MIMO below 6 GHz • Beamforming exploiting TDD
channel reciprocity • Multi-user MIMO • Advanced waveform and multiple
access
Collaboration with Huawei
Massive MIMO @ 5GHz • Application to low SHF • Multi-beam multiplexing • Active Antenna System
Collaboration with NEC
64 antenna-element AAS
Antenna elements
Outdoor 5Gbps Indoor 10Gbps
New radio interface concept • New numerology for wider band and low latency • Ultra high data rate • Beamforming with massive antenna
Collaboration with Ericsson
Achieved more than 2 Gbps at moving speed of 60 km/h
Massive MIMO @ 28GHz • Ultra wideband • Beam-tracking at base station and user device
Collaboration with Samsung
Multi-beam multiplexing • Beamforming @ 44 GHz • Virtual Massive MIMO for
super high bit rate
Collaboration with Mitsubishi Electric
mmW radio access @ 70GHz • For dense small cells and indoor/outdoor hotspot • Beam tracking for mobility • Ultra-wideband (1GHz)
Achieved over 2Gbps in outdoor trial
Collaboration with Nokia
Advanced multiple access • For further cellular enhancements • Power-domain user multiplexing • Advanced receiver (SIC)
Intentional Non-Orthogonality
f NOMA
f OFDMA(LTE) NOMA vs. OFDMA:
~60 % gain
OFDMA (LTE) NOMA
Non-Orthogonal Multiple Access (NOMA)
Features of channel sounder • Mu MIMO measurement • Tx signal: OFDM signal with 50 MHz band width • # of Tx antennas (or UEs): 2 • Rx antenna: Massive array antenna with 256 elements
12.3cm
12.3
cm
Ant. Element
7mm
Rx antenna
伸縮式アンテナポール: 最大10m
Measurement car (Base station side)
Control & Data collection units
Channel Sounding at 20 GHz Band
LTE/5G based Advanced Driver Assistance and Automated Driving Systems • Driving assistance for merge points in the highway • Collision risk warning for urban intersections
Low latency and ultra reliable V2x services
Intelligent Transport Systems (ITS)
application server !
Warning! Base station
Hidden vehicle
Collaboration with DENSO