Patents by Inventor Ratapon Satrusajang

Ratapon Satrusajang 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).

  • Method for controlling communication, method for controlling terminal, communication control device, gateway terminal, and mobile terminal
    Patent number: 7623873
    Abstract: The present invention reduces the number of location registration signals transmitted by slave terminals of gateway terminals forming ad hoc networks. Information on the current location of a gateway terminal is acquired. On the basis of the current location information acquired, a plurality of gateway terminals are grouped into a location registration area. Location registration area information indicative of the location registration area is transmitted to a mobile terminal mastered by the gateway terminal. The slave mobile terminal transmits a location registration signal only if the location registration area information has been changed. This makes it possible to reduce the number of location registration signals transmitted by the slave terminals compared to the case in which the gateway terminals are not grouped.
    Type: Grant
    Filed: October 7, 2005
    Date of Patent: November 24, 2009
    Assignee: NTT DoCoMo, Inc.
    Inventors: Ratapon Satrusajang, Masanori Morita
  • Routing method and mobile terminal
    Patent number: 7512105
    Abstract: A routing method in an ad hoc network formed by a plurality of mobile terminals includes receiving, at a mobile terminal forming part of the ad hoc network, a packet generated by an adjacent terminal, and determining, at the mobile terminal, whether to relay the received packet or not, based on presence or absence of a record of packet relaying by the adjacent terminal.
    Type: Grant
    Filed: January 9, 2006
    Date of Patent: March 31, 2009
    Assignee: NTT DoCoMo, Inc.
    Inventors: Toshihiro Suzuki, Motonari Kobayashi, Ashiq Khan, Ratapon Satrusajang
  • Routing method and mobile terminal
    Publication number: 20060171366
    Abstract: A routing method in an ad hoc network formed by a plurality of mobile terminals includes receiving, at a mobile terminal forming part of the ad hoc network, a packet generated by an adjacent terminal, and determining, at the mobile terminal, whether to relay the received packet or not, based on presence or absence of a record of packet relaying by the adjacent terminal.
    Type: Application
    Filed: January 9, 2006
    Publication date: August 3, 2006
    Applicant: NTT DoCoMo, Inc.
    Inventors: Toshihiro Suzuki, Motonari Kobayashi, Ashiq Khan, Ratapon Satrusajang
  • Method for controlling communication, method for controlling terminal, communication control device, gateway terminal, and mobile terminal
    Publication number: 20060079229
    Abstract: The present invention reduces the number of location registration signals transmitted by slave terminals of gateway terminals forming ad hoc networks. Information on the current location of a gateway terminal is acquired. On the basis of the current location information acquired, a plurality of gateway terminals are grouped into a location registration area. Location registration area information indicative of the location registration area is transmitted to a mobile terminal mastered by the gateway terminal. The slave mobile terminal transmits a location registration signal only if the location registration area information has been changed. This makes it possible to reduce the number of location registration signals transmitted by the slave terminals compared to the case in which the gateway terminals are not grouped.
    Type: Application
    Filed: October 7, 2005
    Publication date: April 13, 2006
    Applicant: NTT DoCoMo, Inc.
    Inventors: Ratapon Satrusajang, Masanori Morita