Kohei OHTA


Mobility Management for IP/LEO Satellite Networks Using Geographical Location
Hiroshi TSUNODA Kohei OHTA Nei KATO Yoshiaki NEMOTO 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2003/02/01
Vol. E86-B  No. 2  pp. 490-497
Type of Manuscript:  Special Section PAPER (Special Issue on Internet Technology III)
Category: Mobile Internet
Keyword: 
LEO satellite IP networkmobility managementhandoverbindinggeographical location
 Summary | Full Text:PDF(793.6KB)

A New Scheme of Combining Advanced Packet Discard and Dynamic Bandwidth Allocation for Low Delay/Low Jitter Realtime Communication Using CBQ/ALTQ
Shunsuke NAKAMURA Nei KATO Kohei OHTA Yoshiaki NEMOTO 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2001/12/01
Vol. E84-B  No. 12  pp. 3124-3132
Type of Manuscript:  Special Section PAPER (Special Issue on Network Software)
Category: Internet Technologies
Keyword: 
CBQCoSbandwidth allocationRED
 Summary | Full Text:PDF(550.8KB)

Proposal of Dynamic Bandwidth Allocation Technique for Low Delay/Low Jitter Realtime Communication and Its Evaluation by Using CBQ
Shunsuke NAKAMURA Kohei OHTA Nei KATO Yoshiaki NEMOTO 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2001/06/01
Vol. E84-B  No. 6  pp. 1513-1520
Type of Manuscript:  Special Section PAPER (Special Issue on New Developments on QoS Technologies for Information Networks)
Category: 
Keyword: 
InternetCBQCoSbandwidth allocation
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A Real-Time Intrusion Detection System (IDS) for Large Scale Networks and Its Evaluations
Nei KATO Hiroaki NITOU Kohei OHTA Glenn MANSFIELD Yoshiaki NEMOTO 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 1999/11/25
Vol. E82-B  No. 11  pp. 1817-1825
Type of Manuscript:  Special Section PAPER (Special Issue on New Paradigms in Network Management)
Category: 
Keyword: 
intrusion detection systemtraffic monitoringtraffic tendencydynamic access tressreal-time
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A Proposal of Event Correlation for Distributed Network Fault Management and Its Evaluation
Nei KATO Kohei OHTA Tomohiro IKA Glenn MANSFIELD Yoshiaki NEMOTO 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 1999/06/25
Vol. E82-B  No. 6  pp. 859-867
Type of Manuscript:  Special Section PAPER (Special Issue on Distributed Processing for Controlling Telecommunications Systems)
Category: 
Keyword: 
event correlationdistributed network managementNetwork Management Clock (NMC)
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The Dynamic Symptom Isolation Algorithm for Network Fault Management and Its Evaluation
Takumi MORI Kohei OHTA Nei KATO Hideaki SONE Glenn MANSFIELD Yoshiaki NEMOTO 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 1998/12/25
Vol. E81-B  No. 12  pp. 2471-2480
Type of Manuscript:  Special Section PAPER (Special Issue on the Latest Development of Telecommunication Research)
Category: Network Design, Operation, and Management
Keyword: 
fault managementSNMPRMON ICMPdynamic symptom isolation
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Construction and Utilization Experiment of Multimedia Education System Using Satellite ETS-V and Internet
Yoshiaki NEMOTO Naokazu HAMAMOTO Ryutaro SUZUKI Tetsushi IKEGAMI Yukio HASHIMOTO Toshiyuki IDE Kohei OHTA Glenn MANSFIELD Nei KATO 
Publication:   IEICE TRANSACTIONS on Information and Systems
Publication Date: 1997/02/25
Vol. E80-D  No. 2  pp. 162-169
Type of Manuscript:  Special Section PAPER (Special Issue on Educational System using Multimedia and Communication Technology)
Category: Multimedia education system using satellite and network communication
Keyword: 
educationsatelliteinternetETS-Vinternetworking
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A Design Principle for Colored-Noise-Tolerant Optimum Despreading-Code Sequences for Spread-Spectrum Systems
Noriyoshi KUROYANAGI Kohei OHTAKE Keiko AKIYAMA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 1996/10/25
Vol. E79-B  No. 10  pp. 1558-1569
Type of Manuscript:  PAPER
Category: Mobile Communication
Keyword: 
spread spectrumcolored noisewhitening filteringlocal-code filtering
 Summary | Full Text:PDF(846.7KB)

Problems in Management Information Retrieval for High-Speed Networks and a Peoposed Solution
Kohei OHTA Nei KATO Hideaki SONE Glenn MANSFIELD Yoshiaki NEMOTO 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 1996/08/25
Vol. E79-B  No. 8  pp. 1054-1060
Type of Manuscript:  Special Section PAPER (Special Issue on Multimedia on Demand)
Category: 
Keyword: 
network managementMIB architecturehigh speed networksquality of management information
 Summary | Full Text:PDF(687.8KB)