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 Conference Papers (Available on Advance Programs)  (Sort by: Date Descending)
 Results 1 - 20 of 34  /  [Next]  
Committee Date Time Place Paper Title / Authors Abstract Paper #
CS 2020-11-06
13:55
Online Online + Central Community Center, Nonoichi Community Center
(Primary: Online, Secondary: On-site)
[Invited Lecture] Technology for Improving Connectivity with Local Networks Assuming Local 5G and Its Demonstration
Takeshi Matsumura, Kazuo Ibuka, Hikaru Kawasaki, Fumihide Kojima (NICT) CS2020-61
Local 5G is expected as a system that enables a unique and advanced local network according to respective local demands.... [more] CS2020-61
pp.69-74
SR, NS, SeMI, RCC, RCS
(Joint)
2020-07-10
13:55
Online Online Field Trial of Millimeter Wave Local Network System based on RoF Technology in Railway Environment
Hikaru Kawasaki, Kazuo Ibuka, Azril Haniz, Takeshi Matsumura, Fumihide Kojima (NICT), Daiki Shibahara, Kenichiro Kamohara, Fumitoshi Abe, Reiji Ishima, Shimpei Toyoda, Youichi Watanabe, Takashi Sugawara (JR-EAST), Shogo Ogawa, Daisuke Yamaguchi, Koki Iwamoto, Kazuki Nakamura (RTRI) RCS2020-75
For mobile vehicles like trains and automobiles, it is important for local operators to efficiently deploy linear cells ... [more] RCS2020-75
pp.99-104
RCS 2020-04-23
10:00
Online Online Development of Millimeter Wave Local Network System with Service Area Extension based on RoF Technology
Takeshi Matsumura, Hikaru Kawasaki, Kazuo Ibuka, Fumihide Kojima (NICT) RCS2020-1
Currently, Local 5G (5th Generation Communication System), which provides private services within limited sites such as ... [more] RCS2020-1
pp.1-6
RCS 2020-04-23
10:35
Online Online Demonstration Experiment of Virtual Pre-Connection Scheme for Trains with Millimeter Wave Railway Linear Cell
Kazuo Ibuka, Hikaru Kawasaki, Azril Haniz, Takeshi Matsumura, Fumihide Kojima (NICT), Daiki Shibahara, Kenichiro Kamohara, Fumitoshi Abe, Reiji Ishima (JR-EAST), Shogo Ogawa, Daisuke Yamaguchi, Koki Iwamoto, Kazuki Nakamura (RTRI) RCS2020-2
In the fifth generation mobile communication system (5G), the use of small cells in the super high frequency (SHF) band ... [more] RCS2020-2
pp.7-11
RCS 2019-10-24
15:25
Kanagawa Yokosuka Research Park [Invited Lecture] R&D on Cooperative Control Schemes Suitable for Local 5G
Hikaru Kawasaki, Kazuo Ibuka, Homare Murakami, Kentaro Ishizu, Takeshi Matsumura, Fumihide Kojima (NICT) RCS2019-188
The fifth-generation mobile system (5G) is expected to be utilized as a communication infrastructure for a variety of em... [more] RCS2019-188
pp.57-62
SR 2019-05-31
10:00
Tokyo Tokyo Big Sight [Technology Exhibit] Empirical Throughput Evaluation for IEEE 802.11af Channel Aggregation
Takeshi Matsumura, Kazuo Ibuka, Homare Murakami, Kentaro Ishizu, Fumihide Kojima (NICT) SR2019-15
In this study, we empirically evaluate throughput in the IEEE 802.11af CA (Channel Aggregation) mode using the previousl... [more] SR2019-15
pp.91-95
RCS, SR, SRW
(Joint)
2019-03-06
10:30
Kanagawa YRP Prototype of IEEE 802.11af Radio Equipment with Channel Aggregation
Takeshi Matsumura, Kazuo Ibuka, Homare Murakami, Kentaro Ishizu, Fumihide Kojima (NICT) SR2018-121
IEEE 802.11af was standardized in 2013 as a WLAN (Wireless Local Area Network) system operated at TVWS (TV White-spaces)... [more] SR2018-121
pp.1-8
RCS, SR, SRW
(Joint)
2019-03-06
16:55
Kanagawa YRP Fast Connection to Local Spot Cell using Virtual Pre-Connection Scheme
Kazuo Ibuka, Takeshi Matsumura, Homare Murakami, Kentaro Ishizu, Fumihide Kojima (NICT) RCS2018-301
In the 5th generation mobile communication system (5G), the usage of higher frequency bands including millimeter-wave ba... [more] RCS2018-301
pp.107-112
RCS, SR, SRW
(Joint)
2019-03-08
10:40
Kanagawa YRP [Invited Lecture] NICT's R&D toward flexible utilization of self-operated wireless systems in 5G era
Kentaro Ishizu, Homare Murakami, Kazuo Ibuka, Takeshi Matsumura, Stanislav Filin, Hikaru Kawasaki, Fumihide Kojima (NICT) SRW2018-71
 [more] SRW2018-71
pp.67-72
RCS, SR, SRW
(Joint)
2018-02-28
14:35
Kanagawa YRP IEEE 802.11af-based Multihop Experiment in the Philippines under the ASEAN-IVO Project on TV White Space for Social Deployment
Alberto S Banacia, Antonio C Montejo (USC), Hirokazu Sawada, Kentaro Ishizu, Kazuo Ibuka, Takeshi Matsumura, Fumihide Kojima (NICT)
 [more]
SR 2018-01-25
13:25
Fukuoka Fukuoka univ. Development of Shared Base Station Supporting Millimeter Wave Bands for Network Sharing Scenario in 5G System
Takeshi Matsumura, Kazuo Ibuka, Homare Murakami, Kentaro Ishizu, Fumihide Kojima (NICT) SR2017-94
In the 5G and beyond cellular networks, micro-cells using mmW (millimeter Wave) bands will be densely deployed to en-han... [more] SR2017-94
pp.1-8
SR, SRW
(Joint)
2017-10-24
14:00
Overseas Grand Hotel Palatino, Rome, Italy [Poster Presentation] A Proposal for Carrier Sense using Control Channel in LTE Systems -- Toward Spectrum Sharing between Different Operators --
Hikaru Kawasaki, Kazuo Ibuka, Kentaro Ishizu, Fumihide Kojima (NICT) SR2017-88 SRW2017-38
In spectrum sharing, Carrier Sense (CS) to detect other radio entities is very important in situations where coordinatio... [more] SR2017-88 SRW2017-38
pp.61-62(SR), pp.55-56(SRW)
RCS 2017-10-19
15:30
Miyagi Tohoku Institute of Technology [Invited Lecture] A Study on Shared Base Station to Realize 5G toward The Fifth Generation Mobile Communication Systems
Kentaro Ishizu, Homare Murakami, Kazuo Ibuka, Stanislav Filin, Fumihide Kojima (NICT) RCS2017-182
 [more] RCS2017-182
pp.81-86
SR 2017-05-25
13:50
Tokyo Tokyo big sight Coordinated Management of Multiple Wireless Networks and Spectrum Sharing toward The Fifth Generation Mobile Communication Systems
Kentaro Ishizu, Homare Murakami, Kazuo Ibuka, Fumihide Kojima (NICT) SR2017-7
 [more] SR2017-7
pp.39-46
SR 2017-05-26
10:00
Tokyo Tokyo big sight [Technology Exhibit] Prototype of USIM Sharing Terminal Enabling Simultaneous Use of Multiple Networks during International Roaming in Next-Generation Mobile Communication System
Kazuo Ibuka, Homare Murakami, Kentaro Ishizu, Fumihide Kojima (NICT) SR2017-11
The frequency used in the mobile communication system typified by LTE (Long Term Evolution) is diversified. Therefore, i... [more] SR2017-11
pp.59-65
SR 2016-10-27
15:00
Osaka Osaka Univ. Nakanoshima Center [Technology Exhibit] Prototype of IEEE 802.11af-based Baseband IC -- Towards Practical Device for TV White-spaces Communication --
Takeshi Matsumura, Kazuo Ibuka, Homare Murakami, Kentaro Ishizu, Hiroshi Harada, Fumihide Kojima (NICT) SR2016-63
Since the FCC stated a policy on unlicensed use of the TV white-spaces (TVWS) in November 2008, a number of countries an... [more] SR2016-63
pp.39-46
SR, SRW
(Joint)
2015-10-27
09:30
Tokyo KKE [Technology Exhibit] TV White-space Vehicle Communication System in Singapore based on LTE Technology
Takeshi Matsumura, Kazuo Ibuka, Vihn Dien Hoang, Homare Murakami, Kentaro Ishizu, Fumihide Kojima (NICT) SR2015-56 SRW2015-37
The authors have developed vehicle communication system utilizing the TV white-spaces (TVWS) in Singapore by using the p... [more] SR2015-56 SRW2015-37
pp.37-40
RCS, SR, SRW
(Joint)
2015-03-05
10:50
Tokyo Tokyo Institute of Technology A study of scheduling scheme on whitespace LTE
Homare Murakami (NICT/Univ. of Tokyo), Kentaro Ishizu, Kazuo Ibuka, Takeshi Matsumura, Fumihide Kojima, Hiroyuki Yano (NICT), Mikio Hasegawa (Tokyo Univ. of Science/NICT), Hiroshi Harada (Kyoto Univ./NICT), Hiroyuki Morikawa (Univ. of Tokyo) RCS2014-341
We have studied an optimization scheme of the parameters, e.g. duplex mode and TDD up-link and down-link ratio, to implr... [more] RCS2014-341
pp.237-242
AP, RCS
(Joint)
2014-11-13
09:25
Yamagata Yamagata University, Yonezawa Campus White-space LTE System in the UK Digital Terrestrial TV Band (1) -- Development and Field Experiment of WSD Operational Environment cooperated with WSDB --
Kazuo Ibuka, Takeshi Matsumura, Kentaro Ishizu, Homare Murakami, Fumihide Kojima (NICT), Hiroshi Harada (Kyoto Univ.) RCS2014-208
Utilization of the TV white-spaces (TVWS), which are spatially or temporally unused frequency in TV bands, is promising ... [more] RCS2014-208
pp.67-72
AP, RCS
(Joint)
2014-11-13
09:50
Yamagata Yamagata University, Yonezawa Campus White-space LTE System in UK Digital Terrestrial TV Band (2) -- Specification and Evaluation of White-space Devices for Interference Avoidance --
Takeshi Matsumura, Kazuo Ibuka, Kentaro Ishizu, Homare Murakami, Fumihide Kojima (NICT), Hiroshi Harada (Kyoto Univ.) RCS2014-209
For further efficient use of spectrum resource, possibilities of white-spaces communication technology have been discuss... [more] RCS2014-209
pp.73-78
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