Makoto Umeuchi
Nippon Telegraph and Telephone
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Publication
Featured researches published by Makoto Umeuchi.
wireless communications and networking conference | 1999
Masahiro Umehira; Masamitsu Nakura; Makoto Umeuchi; Junichi Murayama; Takaaki Murai; Hiroyuki Hara
This paper discusses wireless and IP integrated system architectures for broadband mobile multimedia services. Possible wireless IP network architectures are given and discussed, taking mobility support into account. This paper also proposes a new ATM-based wireless IP network architecture with handover capability for broadband mobile multimedia services.
wireless communications and networking conference | 2009
Takefumi Hiraguri; Masakatsu Ogawa; Makoto Umeuchi; Tetsu Sakata
Wireless LAN access is now being offered by small personal terminals in addition to laptops. Since these terminals have very limited battery capacity, wireless LAN interfaces that offer some form of power saving are essential. IEEE802.11. specifies PSM (Power save management); it reduces power consumption by suspending some communications functions. However, since Multicasting and Broadcasting are invariably received by all terminals regardless of PSM, the terminals unnecessarily consume electric power even if the terminal is not engaged in multicasting. This paper clarifies this problem, and proposes a scheme for reducing power consumption and the results of an experiment confirm its excellent performance.
Archive | 2008
Makoto Umeuchi; Tomohiro Tokuyasu; Takefumi Hiraguri; Toshihiro Manabe
Archive | 1999
Makoto Umeuchi; Masamitsu Nakura; Masahiro Umehira
Archive | 2008
Tomohiro Tokuyasu; Makoto Umeuchi; Toshihiro Manabe; Hiroshi Hojo; Kengo Nagata; Tadao Kobayashi
Archive | 2008
Makoto Umeuchi; 梅内誠; Tomohiro Tokuyasu; 徳安朋浩; Takefumi Hiraguri; 平栗健史; Toshihiro Manabe; 眞部利裕
Archive | 2009
Takeshi Hirakuri; Kenichi Kawamura; Tadao Kobayashi; Toshihiro Manabe; Kengo Nagata; Masakatsu Ogawa; Tomohiro Tokuyasu; Makoto Umeuchi; 将克 小川; 忠男 小林; 健史 平栗; 朋浩 徳安; 誠 梅内; 健悟 永田; 憲一 河村; 利裕 眞部
Archive | 2008
Tomohiro Tokuyasu; Makoto Umeuchi; Toshihiro Manabe; Hiroshi Hojo; Kengo Nagata; Tadao Kobayashi
Archive | 2008
Makoto Umeuchi; Takefumi Hiraguri; Tomohiro Tokuyasu; Toshihiro Manabe
Archive | 2008
Makoto Umeuchi; Tomohiro Tokuyasu; Takefumi Hiraguri; Toshihiro Manabe