No one can predict unforeseen killer applications enabled by new wireless technologies (e.g., 5G network) beforehand. Looking back 20-year history of mobile wireless network, it has been very tough to prepare killer applications a prior to the emergence of new radio access technologies. NTT DOCOMO’s i-mode was not prepared for 2G always-on network., and invented after that. Smartphones with application markets became popular after the 3G network deployment, for which video conversation had been prepared a a killer service candidate and which didn’t make a success. 4G network brought us more capacity and low latency network, while youtube, hulu, Netflix, facebook messenger and others were natured by such a rich mobile communication environment with cloud platforms. Everyone, nowadays, are talking about a buzz word “IoT” without having a solid idea for monetization. Such a bold discussion may mislead our radio access technology development to an unpromised land. My recommendation is “Decide as late as possible, particularly for decisions that are irreversible.” According to software engineering terminology, it says also “late binding.” Don’t rush into a 10Gps broadband network nor a hyper low latency and 0% packet-loss assured network. Having said that, the 5G beam forming radio technology (enabled by Massive MIMO) will bring a unique communication characteristics with a more reliable, higher capacity and 3D-positioning. My bet on 5G killer applications is “Night Golf” where you can play golf without seeing a ball which is being identified by the 5G radio. haha.

1. Evolution of Mobile Networks
and IoT
(IoT時代の５Gネットワーク)
Mick Etoh
@mickbean
NTT DOCOMO
1
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What is Innovation?
Joseph Schumpeter‘s
“neuer Kombinationen”
(Theorie der wirtschaftlichen Entwicklung)
2

3. Innovation Example
2.5G Internet connectivity,
DOCOMO
1998
Micro Browser,
Access Co.
1995
i-mode,
DOCOMO
1999
New Biz. Concept:
Content Provider Bazar
3
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4. Wireless Technologies, the Enablers
Personal Storage
SNS/Comm. Tools
LTE:∼75Mbps2010
+Big data synchronization
Application Market
(games, net contents, etc.)
3.5G: ∼14Mbps 2006
+Smart Phone + Cloud
Mobile Multimedia
3G: 64-384Kbps 2001
+CODEC
i-mode
2G:9.6KbpsX3 1998+micro browser
4
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5. Very Simplified Formula
（単純な式）
Wireless
Broadband
Innovation X
?
5
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❌

6. Distributed Speech Recognition(DSR)
in 2006 （分散音声認識）
First Implementation of ETSI AURORA Project (2000-2003)
16 Khz Sampling MFCC feature vectors --> 5.6 Kbps
Mobile Terminal
Feature
Extraction
Result
Encode
Server
Decode Rec.
Engine
Dictionary
6
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7. 7
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Wireless Broadband
Smartphone with GPS
Google Maps
On-Line Payment

8. LTE-Advanced Network （２０１６-）
Macro Cell Base Station
Small Cell Base Station
Centeraized Radio Access
Network
8
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9
Use Case Categories : ITU-R vision for IMT-2020 and beyond

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eMBB and New Use Cases
10
5G in 2020
eMBB
Massive
MTC
Critical
MTC
eLTE
New RAT
Low latency
New RAT will mainly focus on
eMBB
5G+ in 202X
eMBB
Massive
MTC
Critical
MTC
eLTE
New RAT
New RAT will be enhanced
for all use cases

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11
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)
・LTEに比較して，
周波数帯域幅を拡大
し，TTI長を短縮
・eMBB, URLLC向け
・同一バンド内で異な
る無線パラメータを多
重するためのフィルタ
（もしくは
Windowing）を施した
OFDM信号
・mMTC, URLLC向け
・LTEと比較してトラヒッ
クの有無によらず常時送信
する信号（例えばモビリティ
測定に用いる参照信号）の
量を減らし，干渉量を減ら
すとともに消費電力を下げ
ることができる5Gの基本
的な無線フレーム構成
・全てのUse case向け
・高周波数帯で多数のア
ンテナ素子を用いてビー
ムフォーミングおよびマ
ルチユーザMIMO
・eMBB向け
New RAT
5G Key Technologies for 2020 Deployment

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12
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
・高周波数帯および
スモールセルを高効
率に運用するため，
制御プレーンをマク
ロセルのみで提供す
るアーキテクチャ
・eMBB向け
・LTEからのアシス
トによるTDDバンド
やアンライセンスバ
ンドの活用
・eMBB向け
・送信信号を非直交多重
し，通信容量を拡大する
技術
・eMBB向け（上りリンク
はmMTC向けにも検討）
・カバレッジ拡張や，狭
帯域送信などの低コスト
IoT向けLTE技術，および
LTEにおけるV2xなどの機
能サポート
・mMTC向け（V2xは
URLLC的要素も含む）
Tight LTE integration
5G Key Technologies for 2020 Deployment

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13

14. A Possible Formula in 5G (2020-)
Connectivity
of Things
Night Golf
Minitualized
5G Module
14
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Positioning
of Things

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15
Quuppa Golf - YouTube

16. Strategic Norm: as late as practical
Connectivity
of Things
(T.B.D.)
Innovation X
?
16
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low
latency
Comms.
(T.B.D.)
Enhanced
Mobile
Broadband

17. Late Biding
17
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Decide as late as possible, particularly for decisions
that are irreversible

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18
発表はここまで

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5G Experiments 【w/ Nokia】 @ 70GHz
19
• 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

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20
5G Experiments 【w/ Nokia】 @ 70GHz