Patents by Inventor Zenichi Yashiro

Zenichi Yashiro has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Mobile node
    Patent number: 7680081
    Abstract: A mobile node is arranged to perform a high-quality hand-over operation for eliminating an interruption time in communication and keeping the continuance of communication excellent. The mobile node has a function of interfacing with networks and includes a network quality monitor, a hand-over controller, and a network controller. The network quality monitor operates to monitor a network quality based on at least one of an intensity and a radio bandwidth of a radio wave received by network devices. The hand-over controller performs the hand-over operation of transmitting a care of address to an address registering destination in response to a state of the network quality before a communication is disconnected, changing a route of communication information, and switching a connecting destination into a new network.
    Type: Grant
    Filed: April 14, 2005
    Date of Patent: March 16, 2010
    Assignee: Fujitsu Limited
    Inventors: Takeshi Kamura, Naotaka Tsuji, Yoshiyuki Seguchi, Kazuhiro Muraoka, Hidetoshi Abeta, Hiraku Koganemaru, Zenichi Yashiro, Hitoshi Koike, Nobutsugu Fujino, Fumiyuki Iizuka, Itaru Nakagawa, Keiichi Nakatsugawa, Masahiko Fuse
  • Mobile node
    Publication number: 20050176432
    Abstract: A mobile node is arranged to perform a high-quality hand-over operation for eliminating an interruption time in communication and keeping the continuance of communication excellent. The mobile node has a function of interfacing with networks and includes a network quality monitor, a hand-over controller, and a network controller. The network quality monitor operates to monitor a network quality based on at least one of an intensity and a radio bandwidth of a radio wave received by network devices. The hand-over controller performs the hand-over operation of transmitting a care of address to an address registering destination in response to a state of the network quality before a communication is disconnected, changing a route of communication information, and switching a connecting destination into a new network.
    Type: Application
    Filed: April 14, 2005
    Publication date: August 11, 2005
    Inventors: Takeshi Kamura, Naotaka Tsuji, Yoshiyuki Seguchi, Kazuhiro Muraoka, Hidetoshi Abeta, Hiraku Koganemaru, Zenichi Yashiro, Hitoshi Koike, Nobutsugu Fujino, Fumiyuki Iizuka, Itaru Nakagawa, Keiichi Nakatsugawa, Masahiko Fuse
  • Method of direct memory access control
    Patent number: 5067075
    Abstract: In a system comprising input/output devices, a memory and a control processor, direct memory access information (memory address and data) from an input/output device to the processor is stored temporarily and then a direct memory access request is transmitted to the processor. The processor bus holding time at direct memory access is reduced, and the processing speed of the processor is improved.
    Type: Grant
    Filed: May 10, 1988
    Date of Patent: November 19, 1991
    Assignees: Hitachi, Ltd., Nippon Telegraph & Telephone Corp.
    Inventors: Minoru Sugano, Akira Horiki, Zenichi Yashiro, Hironori Matsushima