Patents by Inventor Shingo Suwa

Shingo Suwa 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).

  • Publication number: 20190359575
    Abstract: A compound of Formula [I] or a pharmaceutically acceptable salt thereof: wherein each symbol is defined as in the specification.
    Type: Application
    Filed: December 20, 2018
    Publication date: November 28, 2019
    Inventors: Masahiro YOKOTA, Taku IKENOGAMI, Eiichi WATANABE, Noriyoshi SEKI, Takayuki SAKAI, Shingo FUJIOKA, Makoto SHIOZAKI, Katsunori SUWA, Yosuke OGOSHI, Masato NOGUCHI, Katsuya MAEDA
  • Patent number: 8320382
    Abstract: A mobile station includes: a QoS (quality of service) requirement determination unit configured to determine a QoS requirement for a data packet; a downlink channel condition estimation unit configured to estimate a downlink channel condition; an identification number extracting unit configured to extract an identification number for the mobile station; and a notification unit configured to notify a base station of the QoS requirement, the identification number for the mobile station, and the downlink channel condition by means of a reservation packet. A base station includes: an uplink channel condition estimation unit configured to estimate an uplink channel condition by means of a reservation packet; a radio parameter control unit configured to determine and control a radio parameter based on the reservation packet and the uplink channel condition.
    Type: Grant
    Filed: April 10, 2006
    Date of Patent: November 27, 2012
    Assignee: NTT DoCoMo, Inc.
    Inventors: Shingo Suwa, Motohiro Tanno, Mamoru Sawahashi
  • Patent number: 7787519
    Abstract: With the object of efficiently transmitting a variety of different information signals by utilizing the multi-carrier characteristics of Multi-carrier/DS-CDMA, the present invention is characterized in that, when, in an uplink transmission from a plurality of mobile stations to a base station, the mobile stations transmit a preamble to the base station before transmitting an information symbol sequence, the mobile stations individually select a carrier from among a plurality of carriers, and, up until receiving a preamble receipt confirmation signal from the base station with a prescribed maximum number of preamble transmissions serving as an upper limit number; the mobile stations repeatedly transmit a preamble by means of the selected carrier and vary the transmission power used for the transmissions of each carrier.
    Type: Grant
    Filed: November 8, 2002
    Date of Patent: August 31, 2010
    Assignee: NTT DoCoMo, Inc.
    Inventors: Shingo Suwa, Hiroyuki Atarashi, Mamoru Sawahashi
  • Publication number: 20090129322
    Abstract: A mobile station includes: a QoS (quality of service) requirement determination unit configured to determine a QoS requirement for a data packet; a downlink channel condition estimation unit configured to estimate a downlink channel condition; an identification number extracting unit configured to extract an identification number for the mobile station; and a notification unit configured to notify a base station of the QoS requirement, the identification number for the mobile station, and the downlink channel condition by means of a reservation packet. A base station includes: an uplink channel condition estimation unit configured to estimate an uplink channel condition by means of a reservation packet; a radio parameter control unit configured to determine and control a radio parameter based on the reservation packet and the uplink channel condition.
    Type: Application
    Filed: April 10, 2006
    Publication date: May 21, 2009
    Applicant: NTT DOCOMO, INC.
    Inventors: Shingo Suwa, Motohiro Tanno, Mamoru Sawahashi
  • Patent number: 7154955
    Abstract: The transmission system of the present invention is designed to transmit a plurality of signals between the transmitter and the receiver using a plurality of carriers and comprises a radio link characteristics estimator 4 configured to estimate the characteristics of a radio link between the transmitter and the receiver and a carrier quantity determination unit 3 configured to determine the number of carriers according to the result of the estimate by the radio link characteristics estimator 4. The radio link characteristics estimator 4 estimates the characteristics according to an interval in delay time of multipath signals and the number of the multipath signals. The carrier quantity determination unit 3 determines fewer carriers when multipath interference is small, and determines more carriers when the multipath interference is great.
    Type: Grant
    Filed: November 8, 2002
    Date of Patent: December 26, 2006
    Assignee: NTT DoCoMo, Inc.
    Inventors: Shingo Suwa, Hiroyuki Atarashi, Sadayuki Abeta, Mamoru Sawahashi
  • Publication number: 20040071194
    Abstract: With the object of efficiently transmitting a variety of different information signals by utilizing the multi-carrier characteristics of Multi-carrier/DS-CDMA, the present invention is characterized in that, when, in an uplink transmission from a plurality of mobile stations to a base station, the mobile stations transmit a preamble to the base station before transmitting an information symbol sequence, the mobile stations individually select a carrier from among a plurality of carriers, and, up until receiving a preamble receipt confirmation signal from the base station with a prescribed maximum number of preamble transmissions serving as an upper limit number; the mobile stations repeatedly transmit a preamble by means of the selected carrier and vary the transmission power used for the transmissions of each carrier.
    Type: Application
    Filed: July 8, 2003
    Publication date: April 15, 2004
    Inventors: Shingo Suwa, Hiroyuki Atarashi, Mamoru Sawahashi
  • Publication number: 20030092404
    Abstract: The transmission system of the present invention is designed to transmit a plurality of signals between the transmitter and the receiver using a plurality of carriers and comprises a radio link characteristics estimator 4 configured to estimate the characteristics of a radio link between the transmitter and the receiver and a carrier quantity determination unit 3 configured to determine the number of carriers according to the result of the estimate by the radio link characteristics estimator 4. The radio link characteristics estimator 4 estimates the characteristics according to an interval in delay time of multipath signals and the number of the multipath signals. The carrier quantity determination unit 3 determines fewer carriers when multipath interference is small, and determines more carriers when the multipath interference is great.
    Type: Application
    Filed: November 8, 2002
    Publication date: May 15, 2003
    Applicant: NNT DoCoMo, Inc.
    Inventors: Shingo Suwa, Hiroyuki Atarashi, Sadayuki Abeta, Mamoru Sawahashi