Masakatsu OGAWA

Development of Multi Channel Ad-Hoc Network System
Kentaro NISHIMORI  Takefumi HIRAGURI  Masakatsu OGAWA  Naoki HONMA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2011/03/01
Vol. E94-B  No. 3  pp. 667-675
Type of Manuscript: Special Section PAPER (Special Section on Information and Communication Technologies for Next-generation Mobile Multimedia Life)
Category: 
Keyword: 
ad-hoc networks,  vertical antenna arrangement,  distributed channel allocation,  multi channels, 
  Summary |  Full Text:PDF (1.4MB)
Power Saving Control Method for Battery-Powered Portable Wireless LAN Access Points in an Overlapping BSS Environment
Masakatsu OGAWA  Takefumi HIRAGURI  Kentaro NISHIMORI  Naoki HONMA  Kazuhiro TAKAYA  Kazuo MURAKAWA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2011/03/01
Vol. E94-B  No. 3  pp. 658-666
Type of Manuscript: Special Section PAPER (Special Section on Information and Communication Technologies for Next-generation Mobile Multimedia Life)
Category: 
Keyword: 
IEEE802.11,  power saving,  portable access point,  overlapping BSS, 
  Summary |  Full Text:PDF (2.2MB)
A Novel Interference Avoidance Technique on Mobile Wireless Routers Using IEEE802.11n PSMP
Akira KISHIDA  Takefumi HIRAGURI  Masakatsu OGAWA  Kentaro NISHIMORI  Naoki HONMA  Tetsu SAKATA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2010/08/01
Vol. E93-B  No. 8  pp. 2053-2062
Type of Manuscript: Special Section PAPER (Special Section on Implementation, Experiments, and Practice for Ad Hoc and Mesh Networks)
Category: 
Keyword: 
IEEE802.11n,  IEEE802.16e,  mutual system interference,  PSMP,  wireless relay, 
  Summary |  Full Text:PDF (2.2MB)
Transmission History Based Distributed Adaptive Contention Window Adjustment Algorithm Cooperating with Automatic Rate Fallback for Wireless LANs
Masakatsu OGAWA  Takefumi HIRAGURI  Kentaro NISHIMORI  Kazuhiro TAKAYA  Kazuo MURAKAWA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2010/08/01
Vol. E93-B  No. 8  pp. 2063-2072
Type of Manuscript: Special Section PAPER (Special Section on Implementation, Experiments, and Practice for Ad Hoc and Mesh Networks)
Category: 
Keyword: 
IEEE 802.11,  CSMA/CA,  contention window adjustment,  automatic rate fallback, 
  Summary |  Full Text:PDF (1.2MB)
Power Saving Scheme Suitable for Wireless LAN in Multimedia Communications
Takefumi HIRAGURI  Masakatsu OGAWA  Makoto UMEUCHI  Tetsu SAKATA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2009/09/01
Vol. E92-A  No. 9  pp. 2184-2190
Type of Manuscript: Special Section PAPER (Special Section on Multi-dimensional Mobile Information Networks)
Category: Wireless LAN System
Keyword: 
wireless LAN,  power saving,  quality of service,  multicasting,  broadcasting, 
  Summary |  Full Text:PDF (969.9KB)
Power Saving Control for Battery-Powered Portable WLAN APs
Masakatsu OGAWA  Takefumi HIRAGURI 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2009/09/01
Vol. E92-A  No. 9  pp. 2253-2256
Type of Manuscript: Special Section LETTER (Special Section on Multi-dimensional Mobile Information Networks)
Category: 
Keyword: 
IEEE802.11,  power saving,  portable access point, 
  Summary |  Full Text:PDF (539KB)
Proposal and Evaluation of a Mesh Wireless Local Area Network Architecture with Dual DCF-HCCA Channel Access Scheme in the Vicinity of Gateway Access Points
Luis LOYOLA  Masakatsu OGAWA  Kengo NAGATA  Satoru AIKAWA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2006/10/01
Vol. E89-B  No. 10  pp. 2752-2762
Type of Manuscript: Special Section PAPER (Special Section on Mobile Multimedia Communications)
Category: 
Keyword: 
mesh networks,  IEEE 802.11,  wireless LAN,  HCCA,  multi-radio, 
  Summary |  Full Text:PDF (1.6MB)
A Novel Media Access Control Using Multiple Queues for Voice over IP in Ad Hoc Networks--D2VTS Algorithm--
Masakatsu OGAWA  Takeshi HATTORI 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2002/10/01
Vol. E85-B  No. 10  pp. 2136-2144
Type of Manuscript: Special Section PAPER (Special Issue on Mobile Multimedia Communications)
Category: 
Keyword: 
ad hoc network,  IEEE 802.11,  packet scheduling,  VoIP,  QoS, 
  Summary |  Full Text:PDF (1.2MB)