Further Development of LTE/LTE-Advanced– LTE Release 10/11 Standardization Trends–

Advanced Technologies in LTE/LTE-Advanced

Heterogeneous Network Capacity Expansion Technology for Further Development of LTE/LTE-Advanced

Radio System Optimization toward Smartphone and Machine Communications for Further Development of LTE/LTE-Advanced

Improved Interference Rejection and Suppression Technology in LTE Release 11 Specifications

Core Network Infrastructure and Congestion Control Technology for M2M Communications

VoLTE Roaming and Interconnection Standard Technology

Shabette-Concier for Raku-Raku Smartphone– Improvements to Voice Agent Service for Senior Users–

RoF Equipment Developed for Coverage in Small Areas where Received Power is Low

W-CDMA/LTE dual-mode Ultra-compact Base Station (Xi Femtocell)

Technology Reports

Oct.2013Vol.15 No.2

Vol.15 N

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DOCOMO Today

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Release 10/11 S

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Growth and Mission of Mobile Communication

Technology Reports (Special Articles)

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Vol. 15 No. 2 Oct. 2013

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DOCOMO Today

Technology Reports (Special Articles)

Advanced Technologies in LTE/LTE-Advanced…………………… 4

Heterogeneous Network Capacity Expansion Technologyfor Further Development of LTE/LTE-Advanced ………………… 9

Radio System Optimization toward Smartphone and Machine Communicationsfor Further Development of LTE/LTE-Advanced ……………………………………18

Improved Interference Rejection and Suppression Technologyin LTE Release 11 Specifications…………………………………………… 27

Core Network Infrastructure and Congestion Control Technologyfor M2M Communications ………………………………………………………… 31

VoLTE Roaming and Interconnection Standard Technology …… 37

HetNet Interference Control Technology CA

3GPP Release 11 LTE/LTE-Advanced IMT-Advanced

Enhanced Radio Control Channel Power Consumption Optimization Congestion Control Technology

3GPP Release 11 Interference-rejection Technology Mobile-device Performance

eNB with high transmission power

Small cell coverage

eNB: eNodeBX2 interface: Wired transmission path for exchanging control information between eNBs.

Macrocell coverage

Optical fiber or X2 interface

RRE or eNB with low transmission power

(P.9)

One subframe (1 msec)

Time

EPDCC

EPDCCH

PDSCHPDCCH

PDCCH

DM-RS

PRB

PRB

One - three OFDM symbols

Tran

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band

wid

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12 su

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Freq

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(P.18)

Cover photograph material : Datacraft Co., Ltd.

Further Development of LTE/LTE-Advanced–LTE Release 10/11 Standardization Trends–

M2M 3GPP Standardization

VoLTE 3GPP Roaming

Growth and Mission of Mobile Communication…………………… 1Narumi Umeda

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Technology Reports(Special Articles) Advanced Technologies in LTE/LTE-Advanced (P.4)

Progression of 3GPP specifications

Latest Trends in Restrictions on the Exercise of Standard-Essential Patent Rights………………………………………………………… 62

Topics

Essential Patent Rights Exercise Restriction NPE

Shabette-Concier for Raku-Raku Smartphone–Improvements to Voice Agent Service for Senior Users– …………42

RoF Equipment Developed for Coverage in Small Areas whereReceived Power is Low………………………………………………………………49

W-CDMA/LTE dual-mode Ultra-compact Base Station (Xi Femtocell) ……56

Raku-Raku Smartphone Voice Agent UI

RoF Indoor Coverage MIMO System

News

（P.42）

（P.69）

Activities

Technology Reports

1999 2000

GSM/GPRS/EDGE enhancements

W-CDMA

1.28Mcps TDDRelease 4

ITU-R M.1457IMT-2000 Recommendation

ITU-R M.2012IMT-Advanced Recommendation

HSDPARelease 5

HSUPA, MBMSRelease 6

HSPA+ (MIMO, HOM etc.)Release 7

LTERelease 8

Release 9

LTE-AdvancedRelease 10Formally approved by ITU-R in January 2012

Release 11

Minor LTEenhancements

2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013

Release 99

Femtocell W-CDMA/LTE Dual Mode PnP

DOCOMO HEVC Decoding Software on Exhibit at World’sLargest Broadcast Equipment Show…………………………………… 69

Former NTT Laboratory Leader Wins U.S. National Academy ofEngineering Award–Dr. Yoshihisa Okumura Becomes First Japanese Scholar toReceive Charles Stark Draper Prize–……………………………………… 70

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