11

Research activities on technologies for future mobile communications in Asia-Pacific region

Chair TG-IMT, APT Wireless Group

2

Introduction

• In the 12th meeting of APT Wireless Group (AWG), it was decided to contribute a presentation from AWG to the ITU-R WP 5D workshop.

• Based on this decision, this presentation is prepared to briefly introduce:– Overview of APT Wireless Group– Overview of mobile communications in the Asia-Pacific region– Studies on future IMT technologies being considered in AWG– Other examples of research projects/programs in the Asia-Pacific

region– AWG workshop on IMT

33

Overview of APT Wireless Group

4

Overview of APT Wireless Group

• The APT Wireless Group (AWG) is covering various aspects of emerging wireless systems including IMT to meet the upcoming digital convergence era in the Asia-Pacific region.

• ToR of AWG:– Share and discuss information of emerging radio technologies, stimulate

research and development, and promote related telecommunication business within the Asia-Pacific region

– Pursue effective solutions in the Asia-Pacific region to meet the rapid movements towards digital convergence

– Provide regular channels to discuss and study spectrum sharing methodologies, spectrum harmonization and to provide advice that countries' can use in frequency band planning

– Develop technical and radio regulatory solutions based on emerging and conventional wireless technologies including satellite technologies to meet APT member's needs

5

Structure of AWG

PlenaryPlenary

Working Group Technology Aspects (WG-Tech)

Task Groups

IMT

CRS and SDR

Intelligent Transport Sys (ITS)

Short Range Device (SRD)

Wireless Power Transmission (WPT)

Working Group Service and Applications (WG-S&A)

Task Groups

Fixed Mobile Convergence

Radiocommunication Convergence

Modern Satellite Applications

Aeronautical and Maritime

Working Group Spectrum Aspects (WG-Spec)

Sub Working Groups

Spectrum Arrangement and Harmonization

Spectrum Monitoring

Task Groups

Sharing Studies on IMT Systems

PPDR

Broadband Wireless Access (BWA)

FSS in the 10-15 GHz Range

6

AWG is Now Growing

• Activities including IMT studies are growing and the number of participants is increasing.– Recent achievements relevant to IMT

• Information on mobile operators’ frequencies, technologies, and license duration (APT/AWF/REP-15)

• APT 700MHz band plan (also included in Rec. ITU-R M.1036)

• Survey and forecast of mobile communications (also included in Rep. ITU-R M.2243(IMT.UPDATE)

• Following the decision of a new “APT Documents Framework” approved at the 35th Session of the APT Management Committee, AWG updated its approval procedure of technical documents.– AWG can send a “Liaison Statement” to external organizations

– This would facilitate AWG to provide necessary communication and share updated information with external organizations.

77

Overview of mobile communicationsin the Asia-Pacific region

8

• No. 1 market in the world in terms of the number of subscriptions– Mobile cellular subscriptions: 2.9 billon in 2011– Active mobile broadband subscriptions: 420 million in 2011

• Subscriptions per 100 inhabitants (i.e., penetration rate), however, are still low compared to other developed regions

– The situation of access to mobile communication services is very different depending on the countries in the Asia-Pacific region

– 2G service (GSM/CDMA) is still popular, however, mobile broadband demand is increasing

0

500

1000

1500

2000

2500

3000

mill

ion

Mobile cellular/Active mobile broadband subscriptions in 2011

Mobile cellular subscriptions

Active mobile broadband subscriptions

Market of Mobile Communications Services

0

20

40

60

80

100

120

140

160

Per 1

00 in

habi

tant

s

Subscriptions per 100 inhabitants in 2011

Mobile cellular subscriptions

Active mobile broadband subscriptions

Source: ITU World Telecommunication /ICT Indicators database

9

APT Survey Report on this Subject

• A new APT Report was developed regarding: – “Survey of trend and forecast on mobile communications in APT

countries” (APT/AWG/REP-28)

• This report contains the information and views from some APT administrations as their responses to the Questionnaire.

• This Report concludes that:– A continuous growth on the number of mobile subscriptions has been

observed in the last several years.

– A continuous growth on the mobile data traffic has been observed in the last several years and this trend is expected to continue because of the increased penetration of various kinds of mobile devices and Internet-based mobile applications, evolution of mobile network, and so on.

– It is also expected that further evolution and innovation of mobile communications will provide more enhanced existing services (e.g., voice, streaming, social networking) and inspire various kinds of new services (e.g., for improved life quality, security and safety, education, etc.).

1010

Studies on future IMT technologies being considered in AWG

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TG-IMT in AWG(1)

• Task Group-IMT (TG-IMT) in Working Group Technology Aspects (WG-TECH) focuses on the work of the following items:– To review activities on the future development of IMT-2000 and

IMT-Advanced discussed in the ITU-R Working Party 5D; – To study service and technology related aspects of the future

development of IMT-2000 and IMT-Advanced as well as the requirements and needs of the developing countries.

• Regarding the second item above, some new topics were proposed to be studied as future IMT technologies, such as:– Active Antenna Systems– Converged RAN base stations– Heterogeneous Network

12

TG-IMT in AWG(2)

• Before initiating these new technical studies, however, TG-IMT agreed that it is essential to collect views from APT members regarding future IMT technologies.– Countries in the region have divergent and different situations in

terms of IMT system deployment– Identification of IMT technologies’ issues in the region is essential

for consideration of a future IMT system in AWG

• For this purpose, the Questionnaire on “Development of future IMT technologies” was developed in the 12th meeting of AWG.

13

Questionnaire on “Development of future IMT technologies”

• The Questionnaire includes the following aspects:– Mobile broadband development – Service and applications– Development and operations– Mobile terminal– Evolution strategy

• Future plan– The 13th meeting of AWG (September, 2012)

• Review the responses to this Questionnaire.

– The 14th meeting of AWG (Spring in 2013)• Target to summarize the regional views on future IMT technologies and

develop a new APT Report

1414

Other examples of research projects/programs in the Asia-Pacific region

15

Overview of research projects/programs in the Asia-Pacific region

• The table below shows some examples of research projects/programs in the Asia-Pacific region relevant to IMT technology evolution.

Organization Project/Program Overview

China (MIIT)• LTE-Hi Project in China: LTE-based Hotspot and Indoor

solution with High Frequency, High-Bandwidth, High Performance.

China • TD-LTE trial

Japan (MIC)

• Several R&D projects with industry, research organization and university for advanced use of spectrum in mobile communication systems.

• These projects are dealing with some future-looking component technologies, such as cooperative control, dynamic use of different radio systems, non-linear multi user MIMO, etc.

Japan (NTT DOCOMO, INC.)

• Development of “Future Radio Access” to enable efficient use of higher/wider frequency bands, which will be based on LTE enhancements or new radio access technologies, targeting around 2018-2020s time frame.

Korea(Samsung Electronics)

• Development of B4G/5G technologies for higher frequency

1616

AWG-13 Workshop

17

Workshop on IMT in AWG-13

Objective• Exchange information among APT members with an overview of and

understanding on the situations, activities, views, etc. related to IMT and facilitate IMT-related work including WRC-15 Agenda Item 1.1

Scope of workshop• Presentations by administrations and industries in the region• Each presentation may include the followings (but not limited to them)

– Current market situation of mobile communications supported by IMT,– On-going activities and/or future plans related to IMT,– Views on future-looking activities for IMT (e.g.,WRC-15 agenda item 1.1, spectrum

harmonization in the Asia-Pacific region),– Expectations and/or suggestions in AWG activities related to IMT, etc.

• The workshop does not exceed half a day in duration and is preferably held in the first day of the 13th meeting of AWG (AWG-13)

• The moderator of the workshop is Dr.Kohei Satoh, Vice chair of AWG

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Final Remarks

• AWG will continue to contribute studies on IMT to ITU-R WP 5D.

• AWG also welcome any expectations or suggestions from WP 5D for further closer collaboration in any matters of mutual interest.

1919

- Appendix -Examples of research groups/projects or programs

in the Asia-Pacific region

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Available bandChina200M

3.4 3.6 4.2

C-band satellite(DL)

Future consideration: The same methodology can be used to seek more spectrum in the future

Progress

In China the band 3.4-3.6GHz for IMT is currently being studied as small cell application with limited transmission power.Verification trial is planned to be held in 2012, will be followed up by the spectrum allocation.

Coexistence field test with C-band satelliteTheoretical study verified the feasibilityField test has started at 2012H1

Band for verification trial will be issued at 2012Q2 at the earliest.

•New band(R8/R9) Frequency:3.4-3.6GHz Bandwidth: 20MHz

•Extending bandwidth CA supported(R10/R11) Bandwidth>=40MHz

•R12 new backward-compatible technologiesDynamic TDD Overhead reduction256QAM……

LTE-Hi Verification Trial Project

•New carrier optimized for local area 2012

#1

LTE-Hi Evolution

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Progress of TD-LTE Trial in China

ParticipantsParticipantsParticipantsParticipants

CircumstancesCircumstancesCircumstancesCircumstances• Cities ： Guangzhou, Hangzhou , Nanjing, Shanghai, Shenzhen,

Xiamen • Add up to 83 Million of population

• Cities ： Guangzhou, Hangzhou , Nanjing, Shanghai, Shenzhen, Xiamen

• Add up to 83 Million of population

90%-99% of theoretical value, w/ CAT3 dongles•55-60Mbps (DL:UL = 2:2, 6 vendors) •76-81Mbps (DL:UL = 3:1, 5 vendors)

(TD-LTE results with 20MHz of Band 38) Peak Throughput

110Mbps was achieved using CAT4 terminal in TD-LTE system with 3:1 configuration.

User Plane and Control Plane Latency

Concurrent Users in one cell• More than 200 users can be connected to the same cell and simultaneously enjoy DL/UL

services (In WCDMA HSPA, typical value is <=64)• Everyone gets more than 100kbps downlink throughput and 50kbps uplink throughput

• End to end user plane latency <=30ms; Control plane latency is around 100ms, comparable with LTE FDD

• Meet NGMN requirement and 3GPP design target

#2

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Research and development of advanced use of spectrum in mobile communication systems (MIC in Japan)

• Ministry of Internal Affairs and Communications (MIC) in Japan is organizing R&D projects to achieve efficient use of spectrum.

• The table below summarizes some recent completed/on-going projects concerning future mobile communication systems.

• From this year, some new R&D projects will also be initiated.http://www.soumu.go.jp/main_sosiki/joho_tsusin/eng/Releases/Telecommunications/120406_01.html

R&D project Timeline Involved parties

Cooperative control among multiple base stations having different cell sizes

FY2008~2011• Softbank Mobile• Softbank Telecom• The University of Electro-Communications

Reliability improvement technology with dynamic use of different radio access technologies

FY2008~2011• KDDI R&D Laboratories• Advanced Telecommunications Research Institute International

Radio resource control technology among multiple radio systems in the same frequency band

FY2008~2011 • NTT DOCOMO• Advanced Telecommunications Research Institute International

Effective use of spectrum using cooperative control among different radio systems

FY2008~2011• National Institute of Information and Communications Technology• NTT PC Communications

Mobile terminal technology supporting different radio systems

FY2008~2011 • National Institute of Information and Communications Technology

Component technology development for ultra high-speed mobile communication system

FY2009~2012• NTT DOCOMO• Tokyo Institute of Technology• Tohoku University

Non-Linear multi-User MIMO technology FY2010~2012 • Advanced Telecommunications Research Institute International

Autonomous mobile cellular area design technology FY2010~2012• Mitsubishi Electric Corporation• KDDI R&D Laboratories

#3

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Development of Future Radio Access (NTT DOCOMO, INC. in Japan)

DOCOMO’s Future Radio Access• Efficient use of higher/wider frequency bands Frequency-separated deployments between wide area & local area

– Wide area – Basic coverage/mobility supported in lower frequency bands, e.g., existing cellular bands

– Local area – High speed data transmission supported on separate frequency band from that of wide area, e.g., higher frequency bands

LTE enhancements or New radio access technologies for future radio access– Massive-antenna technologies to compensate large path loss in higher frequency– Optimum radio parameters for higher frequency– New signal waveform and/or multiple access scheme– Advanced receiver cancellation technologies for inter-cell interference mitigation – etc.

Existing cellular bands(high power density for coverage)

Higher frequency bands(wider bandwidth for high data rate)

Frequency

Very wideCarrier frequency: > 3GHz

Bandwidth: > 200MHzWide area Local area

Mid-term targettoward 2018-2020

Long-term target toward 2020s

Super wideCarrier frequency: > 10GHz

Bandwidth: > 1000MHz

#4

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B4G/5G Technologies for Higher Frequency (Samsung Electronics in Korea) (1/2)

#5

Radio Propagation (1/2)

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Channel measurement results at 28GHz exhibits similar path loss exponent but much less delay spread compared to the current cellular bands

- Txbeamwidth 10o Rx beamwidth 60o

101

102

-70

-60

-50

-40

-30

-20

-10

0

Distance [m]

Rec

eive

d po

wer

[dB

m]

Received power for 10->60

LOSn=2.22, s=4.18dB

NLOS-best

n=3.69, s=3.58dB

NLOS-alln=4.20, s=7.38dB

5

[Received Power]Samsung Electronics, Suwon Campus, Korea

Tx (10o) Rx (60o)28GHz

LOS NLOS

Path Loss Exponent 2.22 3.69

RMS Delay Spread [ns]Median 4.0 34.2

99% 11.4 168.7

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B4G/5G Technologies for Higher Frequency (Samsung Electronics in Korea) (2/2)

#5

Enabling Technologies for New Spectrum

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A New Numerology adequate for higher frequencies

- Shorter CP size, Wider subcarrier spacing, Shorter frame size, etc.

Adaptive Pencil-Beamforming

- Huge beamforming gain with compact-sized antenna at both BS and MS(suitable for the small cell deployment)

Dynamic Virtual Cells

- High link reliability and uniform QoEthrough user-centric virtual cells consisting of cooperating BSs interconnected by wireless links

Observation:

- Markedly different radio propagation conditions (new numerology) along with essential technologies for effective operation in these new higher frequencies

may require a new RAT design

Adaptive Pencil-Beamforming

8 cm

8 cm

256 Elements (16x16) Array(~24dBi Ant Gain)

16 Elements (4x4) Array (~12dBi Ant Gain)

MSBS

l/2 at 30GHz = 0.5cm

2cm

2cm