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© 2016 NTT DOCOMO, INC. All Rights Reserved.
2020年の5G実現とその発展
株式会社NTTドコモ 5G推進室
© 2016 NTT DOCOMO, INC. All Rights Reserved.
5Gが目指す世界(目標性能)
世界的にほぼ共通の要求条件が合意されている 今後、3GPP, ITU-Rにて、評価条件とともに具体的な要求条件を決定
高速通信 低遅延化
多数の端末との接続 低コスト & 省消費電力
•同時接続端末数 100倍 (人が密集する環境,M2M等)
•ネットワークと端末の低消費電力化(バックホールの低コスト化を含めて)
大容量化
•無線区間の遅延 1ms以下
•容量/km2 1000倍
5G •ユーザ体感スループット 100倍 (ピークデータレート 10Gbps以上)
1
© 2016 NTT DOCOMO, INC. All Rights Reserved.
2010 2020 2016
5G技術コンセプトの検討
5Gリアルタイムシミュレータ開発
5G要素技術検討及び実験
商用化
2020年の5G実現に向けたロードマップ
本年
商用装置開発
各国・地域5Gプロジェクト
5Gシステム総合実証試験 (2017~)
5G標準化
© 2016 NTT DOCOMO, INC. All Rights Reserved.
2020 2025 2030
5G+ 5G
2020年以降における5Gの継続的発展 5Gは2020年以降も新技術,新周波数を柔軟に追加して発展し,
さらに高い要求性能を実現する将来への拡張性に優れた無線通信システム
周波数
さらに幅広い 周波数帯を追加利用
無線技術のさらなる高度化 (さらに超多素子なMassive MIMOなど)
ピーク: 数Gbps ピーク: 10Gbps以上
2020年までに利用可能な 周波数帯を利用 (既存バンド含む)
5G New RATの導入 (Tight interworking with LTE)
3
© 2016 NTT DOCOMO, INC. All Rights Reserved.
5G/5G+におけるユースケースの段階的サポート
eMBB use cases
5G in 2020
Massive
MTC
Critical
MTC
eLTE New RAT
“IoT”
New RAT will mainly focus on eMBB use cases
eMBB use cases
5G+
Massive
MTC
Critical
MTC
eLTE
“IoT”
New RAT will be enhanced for all use cases
5G will support both eMBB and IoT use cases together with LTE evolution
New RAT
© 2016 NTT DOCOMO, INC. All Rights Reserved.
Data Rate Improvements Toward 2020 and Beyond
10
100
1000
10000
100000
1000000
10000000
1995 2000 2005 2010 2015 2020 202510 kbps
100 kbps
1 Mbps
10 Mbps
100 Mbps
1 Gbps
10 Gbps
2020 2015 2010 2005 2000
Data rate increase will continue (approx. 100x per 10 years) (quasi-Moore law)
5G
LTE
LTE-Advanced
HSDPA
WCDMA
Ave. ~2Mbps, Peak 14Mbps
Ave. ~24Mbps, Peak 150Mbps
Ave. ~240Mbps, Peak ~600Mbps
5G Ave. ~1Gbps Peak ~5Gbps
5G+ Ave. ~4Gbps Peak >10Gbps
Continuous improvement of user experienced throughput toward 5G/5G+
Peak Average
Use
r dat
a ra
te (
Dow
nlin
k)
5
© 2016 NTT DOCOMO, INC. All Rights Reserved.
5G伝送実験
© 2016 NTT DOCOMO, INC. All Rights Reserved.
5G Experiments w/ Ericsson @ 15 GHz
7
• 730 MHz bandwidth in center frequency 15 GHz
• BS forms a beam per one uniform planar array with 64 antenna elements
• UE receives signals coming from all around directions
Base station(BS) antenna unit
User equipment(UE) antenna
Antenna elements(H-pol)
© 2016 NTT DOCOMO, INC. All Rights Reserved.
5G Experiments w/ Ericsson @ 15 GHz
8
移動局装置#2
移動局装置#1
基地局アンテナ装置
約9m
ピーク通信容量(2ユーザ合計)
小型基地局アンテナ装置
超多素子アンテナ
約3m
屋外マルチビームMIMO実験
© 2016 NTT DOCOMO, INC. All Rights Reserved.
5G Experiments w/ Ericsson @ 15 GHz
9
屋外ビームフォーミング実験
基地局アンテナ装置
約100m
約120m
移動局装置#2
© 2016 NTT DOCOMO, INC. All Rights Reserved.
5G Experiments w/ Huawei @ 2.3 GHz
10
Trial for 5G cellular radio access Frequency band: 2.3 GHz
Frequency bandwidth: ~ 200 MHz
5G new radio access technology for Mobile Broad Band(MBB) and Internet of Things(IoT) ◎High capacity・High data speed
◎Low delay・High reliability・Massive device connectivity
UHF bands Ex. 800MHz, 2GHz
Existing bands Exploitation of higher frequency bands
Frequency
Low SHF bands 3-6GHz
High SHF bands 6-30GHz
EHF bands > 30GHz
© 2016 NTT DOCOMO, INC. All Rights Reserved.
Field trial at Chengdu, China
11
33.8bps/Hz/cell of spectrum efficiency is achieved with 24 MU-MIMO
30 % improvement, 43.9 bps/Hz/cell, of spectrum efficiency using non-linear precoding technique
© 2016 NTT DOCOMO, INC. All Rights Reserved.
5G Experiments w/ Samsung @ 28 GHz
12
Trial for 28 GHz band super-wideband transmission ◎ Beamforming and beam tracking control using Massive MIMO (96-
element) antenna array at base station
◎ Evaluating the feasibility of super high bit rate transmission using 28 GHz band with bandwidth of 800 MHz by indoor and outdoor experiments
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
Trial for 5G cellular system with Samsung
Carrier frequency: 28 GHz Bandwidth: 800 MHz
© 2016 NTT DOCOMO, INC. All Rights Reserved.
5G Experiments w/ Samsung @ 28 GHz
13
◎ Maximum rate of 3.77 Gbps can be achieved in indoor LOS environment
◎ Even in the presence of human body shadowing, throughput of over 1.8 Gbps can be kept
MS
BS
Experimental Site: Samsung Digital City, Suwon, Korea
© 2016 NTT DOCOMO, INC. All Rights Reserved.
5G Experiments w/ Samsung @ 28 GHz
14
◎ Beam tracking can achieve max 2.59 Gbps at moving speed of almost 60 km/h
◎ BF technology enables over 1 Gbps transmission at a point that is almost 200 m away from BS
MS (smartphone-size antennas on top of vehicle)
BS at rooftop of building MS speed
View from top of building View inside vehicle
Experimental Site:Public road near Samsung Digital City, Suwon, Korea
© 2016 NTT DOCOMO, INC. All Rights Reserved.
5G Experiments 【w/ Nokia】 @ 70GHz
15
• Single carrier & beamforming technology using millimeter wave
AP (Access Point): Beamforming
with Lens antenna UD (User device)
Center freq. 73.5 GHz
Bandwidth 1 GHz
Antenna Lens antenna
Beam width 3 deg.
2Gbps
© 2016 NTT DOCOMO, INC. All Rights Reserved.
5G Experiments 【w/ Nokia】 @ 70GHz
16
• Roppongi Hills high-rise complex in Tokyo on October 13
• Achieved maximum data-receiving speed of more than 2Gbps
UD(User Device)
Antenna
AP(Access Point)
© 2016 NTT DOCOMO, INC. All Rights Reserved. 17
2020年の5G実現と5G+に向けた伝送実験
2017年以降,より大規模な5Gシステム実験や 5G+に向けた技術検証のための実験を実施予定
5G伝送技術 未来のアプリケーション候補
+
© 2016 NTT DOCOMO, INC. All Rights Reserved.