Patents by Inventor Kiyotaka Kataoka

Kiyotaka Kataoka 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).

  • Wireless communication system and soft handoff control method in wireless communication system
    Patent number: 8175606
    Abstract: When measurement results of received radio wave intensities of wireless base stations, which demands a soft handoff, are received from a wireless terminal in a wireless communication system and when a base station controller attempts to acquire a traffic channel in a wireless base station, via which a wireless communication path will be added, in the state in which the channel resource usage rate of that wireless base station is over a threshold, a traffic channel may be acquired only if the ratio between the radio wave intensity of the wireless base stations establishing communication paths and the radio wave intensity of the wireless base station via which a communication path will be added is higher than a threshold or if the difference between the radio wave intensity of the wireless base stations and the radio wave intensity of the wireless base station smaller than a threshold.
    Type: Grant
    Filed: December 16, 2008
    Date of Patent: May 8, 2012
    Assignee: Hitachi, Ltd.
    Inventors: Kiyoshi Ichikawa, Michihiro Asanuma, Kiyotaka Kataoka
  • WIRELESS COMMUNICATION SYSTEM AND SOFT HANDOFF CONTROL METHOD IN WIRELESS COMMUNICATION SYSTEM
    Publication number: 20090191879
    Abstract: When measurement results of received radio wave intensities of wireless base stations, which demands a soft handoff, are received from a wireless terminal in a wireless communication system and when a base station controller attempts to acquire a traffic channel in a wireless base station, via which a wireless communication path will be added, in the state in which the channel resource usage rate of that wireless base station is over a threshold, a traffic channel may be acquired only if the ratio between the radio wave intensity of the wireless base stations establishing communication paths and the radio wave intensity of the wireless base station via which a communication path will be added is higher than a threshold or if the difference between the radio wave intensity of the wireless base stations and the radio wave intensity of the wireless base station smaller than a threshold.
    Type: Application
    Filed: December 16, 2008
    Publication date: July 30, 2009
    Applicant: HITACHI COMMUNICATION TECHNOLOGIES, LTD.
    Inventors: Kiyoshi Ichikawa, Michihiro Asanuma, Kiyotaka Kataoka