Patents by Inventor Masafumi Hikari

Masafumi Hikari 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).

  • Patent number: 8175023
    Abstract: Radio resources are utilized efficiently and the communication quality is improved by flexibly adapting to the state of radio waves at a base station varying every moment or the topology of the distribution area of contents in multicast communication. The base station (100) stores information including the flow distribution starting time, the error rate measuring period, the threshold in an intra-base station flow management table. When detecting that it becomes the time before the error rate measuring period from the flow distribution starting time, the reception quality of radio terminals in the communication area of the base station (100) is measured. A base station (100-b) where the reception quality exceeds the threshold redundantly transmits multicast data assigned to a plurality of radio resources (800-b1, 800-b3, 800-b5). A base station (100-a) where the reception quality does not exceed the threshold transmits multicast data assigned to a single radio resource (800-a1).
    Type: Grant
    Filed: January 25, 2007
    Date of Patent: May 8, 2012
    Assignee: Hitachi, Ltd.
    Inventors: Masafumi Hikari, Yoshimi Saito, Shinji Matsumoto, Jun Asaki
  • Publication number: 20100039977
    Abstract: Radio resources are utilized efficiently and the communication quality is improved by flexibly adapting to the state of radio waves at a base station varying every moment or the topology of the distribution area of contents in multicast communication. The base station (100) stores information including the flow distribution starting time, the error rate measuring period, the threshold in an intra-base station flow management table. When detecting that it becomes the time before the error rate measuring period from the flow distribution starting time, the reception quality of radio terminals in the communication area of the base station (100) is measured. A base station (100-b) where the reception quality exceeds the threshold redundantly transmits multicast data assigned to a plurality of radio resources (800-b1, 800-b3, 800-b5). A base station (100-a) where the reception quality does not exceed the threshold transmits multicast data assigned to a single radio resource (800-a1).
    Type: Application
    Filed: January 25, 2007
    Publication date: February 18, 2010
    Applicant: HITACHI COMMUNICATION TECHNOLOGIES, LTD.
    Inventors: Masafumi Hikari, Yoshimi Saito, Shinji Matsumoto, Jun Asaki
  • Publication number: 20020087695
    Abstract: A method for managing a network system via a managed object (MO), wherein a system administrator inputs to a network element connected to a maintenance terminal, a system ID for a network element under network management. The network element to be managed receives the system ID and sends back its own address to the network element connected to the maintenance terminal. The network element connected to the maintenance terminal, when receiving the address, sends a MO generator Protocol Data Unit (PDU) to the network element to be managed, and then allows the network element to be managed to generate a MO therein. The network element connected to the maintenance terminal also receives the MO generator PDU from the network element to be managed, and generates the MO for the network element to be managed on its own network element.
    Type: Application
    Filed: August 3, 2001
    Publication date: July 4, 2002
    Inventors: Satoko Araki, Yoshimi Nakagawa, Takeshi Sato, Takao Iwata, Masafumi Hikari