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 Conference Papers (Available on Advance Programs)  (Sort by: Date Descending)
 Results 1 - 20 of 52  /  [Next]  
Committee Date Time Place Paper Title / Authors Abstract Paper #
PN 2020-08-24
10:55
Online Online Enlarging optical communication capacity with relaxing error-ratio constraints and its system
Yohei Hasegawa, Hidemi Noguchi, Kohei Hosokawa, Morihiko Ota (NEC Corp.) PN2020-15
 [more] PN2020-15
pp.11-16
IE, IMQ, MVE, CQ
(Joint) [detail]
2020-03-06
10:45
Fukuoka Kyushu Institute of Technology Accurate OD Traffic Matrix Estimation Using Pseudo Network Topology
Yohei Hasegawa, Masato Uchida (Waseda Univ.) CQ2019-150
In this paper, we consider the problem of estimating the traffic rate of every unobservable global flow (individual-flow... [more] CQ2019-150
pp.81-86
CQ, CBE
(Joint)
2020-01-17
09:40
Tokyo NHK Science & Technology Research Laboratories Bayesian channel selection method for LoRaWAN under unpredictable wireless channel fluctuations
Daichi Kominami (Osaka Univ.), Yohei Hasegawa, Kosuke Nogami, Hideyuki Shimonishi (NEC), Masayuki Murata (Osaka Univ.) CQ2019-122
Internet of Things (IoT) become a common term used in society. LPWA technology is attracting attention as one of its ele... [more] CQ2019-122
pp.83-88
SR 2019-05-30
15:55
Tokyo Tokyo Big Sight [Invited Lecture] Implementation of Multi-User ACK Aggregation Method for Large-Scale Reliable LoRaWAN Services
Yohei Hasegawa (NEC Corp.), Kazuya Suzuki (Akita Pref. Uni.) SR2019-8
In this paper, we show an implementation of the Multi-user ACK-frame aggregation method for large-scale reliable LoRaWAN... [more] SR2019-8
pp.49-56
SANE, SAT
(Joint)
2019-02-14
14:25
Kagoshima Tanegashima Island Adaptive distributed frame repetition with optical transponder for long-distance free-space communication systems
Toshiharu Ito, Yohei Hasegawa, Yoshimasa Ono, Manabu Arikawa (NEC) SAT2018-65
In order to stably achieve high throughputs in the satellite-to-ground free space optical communication systems, suppres... [more] SAT2018-65
pp.47-52
SANE, SAT
(Joint)
2019-02-14
14:50
Kagoshima Tanegashima Island A Data Transfer Throughput Model with Ultra-High-Speed TCP and Adaptive Frame Repetition for Free-Space Optical Satellite Communications
Yohei Hasegawa, Toshiharu Ito, Yoshimasa Ono, Manabu Arikawa (NEC Corp.) SAT2018-66
We discuss a performance model for TCP/IP data transfer throughput over free-space optical satellite communications (FSO... [more] SAT2018-66
pp.53-58
ASN, NS, RCS, SR, RCC
(Joint)
2018-07-13
11:45
Hokkaido Hakodate Arena A Multi-User ACK Frame Aggregation Method for LoRaWAN
Yohei Hasegawa (NEC Corp.), Kazuya Suzuki (Akita Prefectural Univ.), Toshio Tonouchi (NEC Corp.) NS2018-75
We propose a multi-user ACK aggregation method for LoRaWAN. The proposed method includes two techniques: 1. ACK aggregat... [more] NS2018-75
pp.185-190
NS 2018-04-19
13:25
Fukuoka Fukuoka Univ. Channel assignment for LPWA networks inspired by perceptual decision-making of human brain
Daichi Kominami (Osaka Univ.), Kazuya Suzuki, Yohei Hasegawa, Hideyuki Shimonishi (NEC), Masayuki Murata (Osaka Univ.) NS2018-2
Low power wide area (LPWA) technology that realizes low-power-consumption and wide-area communication is rapidly spreadi... [more] NS2018-2
pp.7-12
IA, SITE, IPSJ-IOT [detail] 2017-03-04
09:00
Okinawa Culture Resort Festone (Okinawa) A TCP ACK congestion control method for data transfer over Wi-Fi
Yohei Hasegawa (NEC) SITE2016-74 IA2016-104
We report evaluation results that our TCP ACK congestion control method improved data transfer throughput over Wi-Fi by ... [more] SITE2016-74 IA2016-104
pp.113-118
NS 2014-05-16
10:50
Yamanashi Yamanashi Univ. A study on SDN transport technology for gradual migration from existing network
Masahiro Hayashitani, Yohei Hasegawa, Kazuya Suzuki, Yasuhiro Mizukoshi (NEC) NS2014-36
We have proposed the SDN transport technology realizing flexible control and cost (CAPEX/OPEX) reduction in carrier netw... [more] NS2014-36
pp.69-73
NS 2013-10-17
10:40
Hokkaido Hokkaido Univ. SDN transport technology for realizing reliable virtual router
Masahiro Hayashitani, Yohei Hasegawa, Kazuya Suzuki, Yasuhiro Mizukoshi (NEC) NS2013-93
We have proposed virtual router architecture which controls MPLS-TP, reliable packet transport technology, by SDN flexib... [more] NS2013-93
pp.19-23
PN 2012-08-30
15:40
Hokkaido Kitami Institute of Technology [Invited Talk] OpenFlow enabled software-defined packet transport network
Masahiro Hayashitani (NEC), Itaru Nishioka (NEC America), Yohei Hasegawa, Yohei Iizawa, Yasuhiro Mizukoshi, Soichiro Araki (NEC) PN2012-19
 [more] PN2012-19
pp.29-33
NS 2012-05-17
15:00
Tokyo National Institute of Informatics A Performance Evaluation of TCP-FSO over Free-Space Optical Link
Yohei Hasegawa, Yasuhiro Mizukoshi (NEC Corp.), Yoshihisa Takayama, Morio Toyoshima (NICT) NS2012-19
In this paper, we discuss field test results of TCP-FSO which is a customized transport protocol for Free-Space-Optical ... [more] NS2012-19
pp.17-22
IN, NS
(Joint)
2011-03-04
14:10
Okinawa Okinawa Convention Center Prototype of Reliable Transport mechanism for Supervisory Control and Data Acquisition Systems
Tomohiko Yagyu, Ichiro Yamaguchi, Yohei Hasegawa, Norihito Fujita, Masahiro Jibiki, Hidenori Waragai, Reiko Matsushima (NEC) NS2010-291
This paper describes an overview of reliable and real-time datagram protocol (R2DP) for remote supervisory control and... [more] NS2010-291
pp.729-734
RECONF 2008-09-26
11:00
Okayama Okayama Univ. Practice Evaluation Dynamically Reconfigurable Processor MuCCRA-2β
Yoshiki Saito, Masaru Kato, Shotaro Saito, Toru Sano, Keiichiro Hirai, Takashi Nishimura, Takuro Nakamura, Satoshi Tsutsumi, Yohei Hasegawa, Hideharu Amano (Keio Univ.) RECONF2008-34
Dynamically Reconfigurable Processing Array (DRPA) have been received an attention as a flexible and efficient off-loadi... [more] RECONF2008-34
pp.69-74
RECONF 2008-05-23
09:00
Fukushima The University of Aizu Designing And Evaluating Dynamically Reconfigurable Processor with Power Gating Technique
Yoshiki Saito (Keio Univ.), Toshiaki Shirai (Shibaura Inst.), Takuro Nakamura, Takashi Nishimura, Yohei Hasegawa, Satoshi Tsutsumi (Keio Univ.), Toshihiro Kashima, Mitsutaka Nakata, Seidai Takeda, Kimiyoshi Usami (Shibaura Inst.), Hideharu Amano (Keio Univ.) RECONF2008-10
A dynamically reconfigurable processor achieves high performance making the best use of high degree of parallelism with ... [more] RECONF2008-10
pp.55-60
ICD, IPSJ-ARC 2008-05-14
15:30
Tokyo   A Fine Grain Dynamic Sleep Control Scheme in Superscalar Processor
Yu Kojima, Daisuke Ikebuchi, Naomi Seki, Yohei Hasegawa, Hideharu Amano (Keio Univ.), Toshihiro Kashima, Seidai Takeda, Toshiaki Shirai, Mitsutaka Nakata, Kimiyoshi Usami (Shibaura Inst of Tech), Tetsuya Sunada, Jun Kanai, Mitaro Namiki (Tokyo Univ. of Agri & Tech), Masaaki Kondo, Hiroshi Nakamura (Univ. of Tokyo)
Geyser-0 is a low power MIPS R3000 processor which uses a novel fine grain power gating technique to computational units... [more] ICD2008-33
pp.87-92
RECONF, CPSY, VLD, IPSJ-SLDM 2008-01-16
15:10
Kanagawa Hiyoshi Campus, Keio University Development of verification and power estimation methodology for circuits with Run Time Power Gating
Mitsutaka Nakata, Toshiaki Shirai, Toshihiro Kashima, Seidai Takeda, Kimiyoshi Usami (S.I.T.), Naomi Seki, Yohei Hasegawa, Hideharu Amano (Keio Univ.) VLD2007-111 CPSY2007-54 RECONF2007-57
When applying Run-Time Power Gating (RTPG) to a design,logic verification is one of the major problems.Gate-level simula... [more] VLD2007-111 CPSY2007-54 RECONF2007-57
pp.37-42
RECONF, CPSY, VLD, IPSJ-SLDM 2008-01-16
15:35
Kanagawa Hiyoshi Campus, Keio University Physical design and Evaluation of MIPS R3000 processor applying Run Time Power Gating
Toshiaki Shirai, Toshihiro Kashima, Seidai Takeda, Mitsutaka Nakata, Kimiyoshi Usami (S.I.T.), Yohei Hasegawa, Naomi Seki, Hideharu Amano (Keio Univ.) VLD2007-112 CPSY2007-55 RECONF2007-58
Run Time Power Gating (RTPG) is a technology that reduces leakage power in a temporally/spatially fine-grained manner. T... [more] VLD2007-112 CPSY2007-55 RECONF2007-58
pp.43-48
RECONF, CPSY, VLD, IPSJ-SLDM 2008-01-17
11:05
Kanagawa Hiyoshi Campus, Keio University Implementation of 3-D Dynamically Reconfiguarable Device using Inter-Chip Wireless Communication
Shotaro Saito, Yasufumi Sugimori, Yoshinori Kohama, Tadahiro Kuroda, Yohei Hasegawa, Hideharu Amano (Keio Univ.) VLD2007-123 CPSY2007-66 RECONF2007-69
This paper describes the physical design and evaluation of 3-D dynamically reconfigurable processor MuCCRA-Cube which co... [more] VLD2007-123 CPSY2007-66 RECONF2007-69
pp.31-36
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