NTT DOCOMO
Oct.2016No.2vol.18
Technology Reports (Special Articles)
● What We Can Do
DOCOMO Today
Special Articles on Introducing the 3.5-GHz Band
● NTT DOCOMO’s Efforts Concerning Technical Developments for Introducing TD-LTE in 3.5-GHz Frequency Band
● Base-station Equipment with the Aim of Introducing 3.5-GHz Band TD-LTE
● Base Station Antennas for 3.5-GHz Band
● High-precision Clock-time-synchronization Network Equipment for Introduction of 3.5-GHz Band TD-LTE
● Router-type Mobile Terminal for TD-LTE in 3.5-GHz Band
Technology Reports (Special Articles)
Special Articles on LTE-Advanced Release 13 Standardization
● LTE-Advanced Release 13 Standardization Technology Overview
● New Technologies for Achieving IoT in LTE Release 13
● Broadband Frequency Technologies in LTE-Advanced Release 13
● LTE-Advanced Release 13 Multiple Antenna Technologies and Improved Reception Technologies
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Vol.18 No.2 Oct. 2016
What We Can Do ······························································································ 1
Kazuhiro Watanabe
Special Articles on Introducing the 3.5-GHz Band
NTT DOCOMO’s Efforts Concerning Technical Developments for Introducing TD-LTE in 3.5-GHz Frequency Band ······························· 4
Base-station Equipment with the Aim of Introducing 3.5-GHz Band TD-LTE ···· 8
Base Station Antennas for 3.5-GHz Band ··············································· 14
High-precision Clock-time-synchronization Network Equipment for Introduction of 3.5-GHz Band TD-LTE ··············································· 18
Router-type Mobile Terminal for TD-LTE in 3.5-GHz Band ··············· 27
Special Articles on LTE-Advanced Release 13 Standardization
LTE-Advanced Release 13 Standardization Technology Overview ····· 32
New Technologies for Achieving IoT in LTE Release 13 ··················· 39
Broadband Frequency Technologies in LTE-Advanced Release 13 ···· 52
LTE-Advanced Release 13 Multiple Antenna Technologies and Improved Reception Technologies ··························································· 62
CA TD-LTE 3.5-GHz Band
High-density BDE 3.5-GHz Band TD-LTE
Remote Tilt Base Station Antenna 3.5-GHz Band
UTC TD-LTE
3DL CA TD-LTE 3.5-GHz Band
Release 13 3GPP
eDRX NB-IoT M1
Unlicensed Frequency Utilization DC CA
BS IRC AAS
(P.27)
AAS
Transceiver unit
Transceiver unit
・・
・
Antenna
TAB connector (reference point for conducted requirement)
Range of AAS RF specifications
Rad
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netw
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・・・
(P.62)
(P.8)
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Improving IP-based OSS Reliability During Large-scale Disasters ····· 72
2015 Wireless Innovation Forum Technology of the Year Award ····· 78
IP-based OSS
Technology Reports (Special Articles) NTT DOCOMO’s Efforts Concerning Technical Developments for Introducing
TD-LTE in 3.5-GHz Frequency Band (P.4)
CA by advanced C-RAN architecture
Backup system
Image of the two IP-based OSS bases
Tokyo
Osaka
Nagano
Old IP-based OSS system 1 (SBY)
Old IP-based OSS system 0 (ACT)
Two bases (remote cluster)
New IP-based OSS system 1 (SBY)
(P.72)
Fre
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an
dw
idth
Macro cell Small cell
CA CA CA
Baseband unit
HO HO
Radio units with small size
Achieves CA between a macrocell and multiple add-on cellsby adding small cells inside themacro cell in a high-traffic area
Achieves CA byoverlapping macrocell
Achieves CA by spotdeployment of a smallcell
Consolidates basebandprocessing to performcontrol operations
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