Patents by Inventor Erina Kojima

Erina Kojima 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).

  • Communication system, a repeater terminal in a communication system and a communication method
    Patent number: 7957334
    Abstract: This invention provides a communication system, a repeater terminal in the communication system and a communication method for improving the characteristics in a multi-hop communication by a diversity gain and reduces the power consumption by wasteful retransmission in packet transmission at a wireless terminal. When a transmitter terminal S sends a packet first time, repeater terminals R1-R13 perform a data transmission by retransmission at all the terminals which received the packet. When a transmitter terminal S sends a packet second time, a repeater terminal determines its own contribution based on the hop numbers of the repeating in the packet transmission and the return ACK (or NACK) repeating. The repeater terminal with a high contribution autonomously determines to be in “repeater mode” and the repeater terminal with a low contribution autonomously determines to be in “sleep mode”.
    Type: Grant
    Filed: January 20, 2006
    Date of Patent: June 7, 2011
    Assignee: The University of Electro-Communications
    Inventors: Takeo Fujii, Erina Kojima
  • Communication System, a Repeater Terminal in a Communication System and a Communication Method
    Publication number: 20080165721
    Abstract: This invention provides a communication system, a repeater terminal in the communication system and a communication method for improving the characteristics in a multi-hop communication by a diversity gain and reduces the power consumption by wasteful retransmission in packet transmission at a wireless terminal. When a transmitter terminal S sends a packet first time, repeater terminals R1-R13 perform a data transmission by retransmission at all the terminals which received the packet. When a transmitter terminal S sends a packet second time, a repeater terminal determines its own contribution based on the hop numbers of the repeating in the packet transmission and the return ACK (or NACK) repeating. The repeater terminal with a high contribution autonomously determines to be in “repeater mode” and the repeater terminal with a low contribution autonomously determines to be in “sleep mode”.
    Type: Application
    Filed: January 20, 2006
    Publication date: July 10, 2008
    Applicant: NATIONAL UNIVERSITY CORPORATIOI TOKYO UNVERSITY OF AGRICULTURE AND TECHNOLOGY
    Inventors: Takeo Fujii, Erina Kojima