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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
o.2 Oct.2013
DOCOMO Today
Fu
rther D
evelop
men
t of LT
E/LT
E-A
dvan
ced −
LTE
Release 10/11 S
tand
ardizatio
n Tren
ds−
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
smiss
ion
band
wid
th
12 su
bcar
riers
Freq
uenc
y
(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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