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Latest external collaboration on country level. Dive into details by clicking on the dots.

Hotspot


Dive into the research topics where Keiji Usuba is active.

Publication


Featured researches published by Keiji Usuba.


Archive | 2008

Radio communication system and base station

Akihiko Yoshida; Shiro Mazawa; Kiyoshi Kawamoto; Yosuke Takahashi; Keiji Usuba


Archive | 1999

Bi-directional line switched ring network system

Keiji Usuba; Masatoshi Takahashi; Mitsunobu Kimura; Seigo Obayashi; Takashi Mori


Archive | 2000

Transmission equipment for network and network transmission system

Keiji Usuba; Yoshimi Nakagawa; Satoko Araki; Yusuke Yajima


Archive | 2014

Traffic control method and traffic control apparatus

Akihiko Yoshida; Keiji Usuba


Archive | 2009

Adjoining base station determining method and management device

Daigo Takayanagi; Keiji Usuba


Archive | 2008

RADIO COMMUNCATION APPARATUS

Akihiko Yoshida; Shiro Mazawa; Kiyoshi Kawamoto; Yosuke Takahashi; Keiji Usuba


Archive | 2001

Pathsize control method and operation of transmission apparatus

Yoshimi Nakagawa; Satoko Araki; Takao Iwata; Takeshi Sato; Keiji Usuba


Archive | 2014

System for specifying cause of microburst occurrence and method for specifying cause of microburst occurrence

Daigo Takayanagi; Keiji Usuba; Yosuke Takahashi; Akihiko Yoshida


Archive | 2011

Cellular system and hand-off quality improvement method

Daigo Takayanagi; Keiji Usuba; Tsuyoshi Tamaki


Archive | 2004

A radio communication apparatus

Kiyoshi Kawamoto; Shirou Mazawa; Yousuke Takahashi; Keiji Usuba; Akihiko Yoshida

Collaboration


Dive into the Keiji Usuba's collaboration.

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