Patents by Inventor Daisuke Nishikawa

Daisuke Nishikawa 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: 8942203
    Abstract: It is an object to provide a transmission power control method, mobile terminal apparatus and radio base station apparatus for enabling a mobile terminal apparatus that performs radio communications in a system band including a plurality of component carriers to suitably control uplink transmission power in each component carrier, and a transmission power control method of controlling uplink transmission power of a mobile terminal apparatus that performs radio communications in a system band including a plurality of component carriers is provided with the steps of receiving a transmission power control command generated in a radio base station apparatus, and applying the received transmission power control command to a plurality of component carriers in common and setting transmission power of each component carrier.
    Type: Grant
    Filed: June 16, 2011
    Date of Patent: January 27, 2015
    Assignee: NTT DoCoMo, Inc.
    Inventors: Daisuke Nishikawa, Yoshihisa Kishiyama
  • Publication number: 20150023268
    Abstract: An objective is to improve communication quality by reducing an insertion loss or the like of a diplexer inserted to reduce a leakage from an uplink band to a downlink band in different bands. A mobile communication method according to the present invention includes the steps of: transmitting simultaneous transmission capability information from a mobile station UE to a radio base station eNB, the simultaneous transmission capability information indicating whether or not the mobile station UE can transmit uplink data signals via multiple carriers in the same sub-frame while performing uplink CA; performing scheduling for the mobile station UE by the radio base station eNB on the basis of the simultaneous transmission capability information; and performing communication by the mobile station UE on the basis of the scheduling information.
    Type: Application
    Filed: January 31, 2013
    Publication date: January 22, 2015
    Inventors: Tooru Uchino, Sadayuki Abeta, Anil Umesh, Hideaki Takahashi, Yuta Sagae, Daisuke Nishikawa, Kazuaki Takeda
  • Patent number: 8929232
    Abstract: A transmission power control method and a mobile station apparatus that can adequately control the transmission power of a mobile station apparatus having multiple transmitting antennas is disclosed. The uplink transmission power control for the mobile station apparatus measures the path loss of at least one transmitting antenna, sets a representative value path loss based on the measured path loss measurement value, determines a total transmission power of the mobile station apparatus based on the representative value path loss, and determines the transmission power of each transmitting antenna by distributing the total transmission power to the transmitting antennas.
    Type: Grant
    Filed: April 5, 2011
    Date of Patent: January 6, 2015
    Assignee: NTT DoCoMo, Inc.
    Inventors: Yoshihisa Kishiyama, Daisuke Nishikawa, Tetsushi Abe, Nobuhiko Miki, Hiroyuki Ishii
  • Patent number: 8886204
    Abstract: A telecommunication control method for a heterogeneous network is provided. Uplink interference created by first user equipment (MUE) connected to a first-type cell (MeNB) is detected at the second-type cell (HeNB). The second-type cell reports the interference pattern of the detected interference to the first-type cell. The first-type cell identifies the interfering first user equipment based upon the interference pattern. The first-type cell notifies the second-type cell of the scheduling information of the interfering first user equipment. The second-type cell determines scheduling for second user equipment (HeUE) connected to the second-type cell based upon the scheduling information of the first user equipment.
    Type: Grant
    Filed: June 20, 2011
    Date of Patent: November 11, 2014
    Assignees: NTT DoCoMo, Inc., Agency for Science, Technology and Research
    Inventors: Daisuke Nishikawa, Tetsushi Abe, Motohiro Tanno, Zhongding Lei, Sai Ho Wong, Francois Po Shin Chin
  • Patent number: 8858067
    Abstract: A flow channel structure that includes a first inlet path for a first fluid, a second inlet path for a second fluid, a merging portion that merges, in the thickness direction of a substrate, the first fluid and the second fluid, a first merged fluid channel in which both fluids merged in the merging portion flow along a top surface of the substrate, a flow direction altering portion that causes the flow direction of the fluid flowing through the first merged fluid channel to change from the top surface side of the substrate towards the back surface side thereof, and a second merged fluid channel for changing the flow direction of this fluid to flow to the downstream side so that the fluid flowing from the first merged fluid channel through the flow direction altering portion flows along the back surface of the substrate.
    Type: Grant
    Filed: November 15, 2011
    Date of Patent: October 14, 2014
    Assignee: Kobe Steel, Ltd.
    Inventors: Koji Noishiki, Makoto Nishimura, Takeshi Yamashita, Daisuke Nishikawa
  • Publication number: 20140293947
    Abstract: To ensure stable operation of a user terminal even in the case where the user terminal is instructed to transmit uplink signals at different transmission timings with a plurality of component carriers, in a radio communication system provided with a radio base station apparatus that indicates transmission timings of uplink signals for each component carrier, and a user terminal that transmits an uplink signal at a transmission timing set based on transmission timing information indicated from the radio base station apparatus and the like, it is a feature that the radio base station apparatus indicates different transmission timing information in a plurality of component carriers, and that the user terminal avoids simultaneous transmission of uplink signals in the case of performing communications using a plurality of contiguous component carriers.
    Type: Application
    Filed: November 8, 2012
    Publication date: October 2, 2014
    Applicant: NTT DOCOMO, INC.
    Inventors: Daisuke Nishikawa, Kazuaki Takeda, Satoshi Nagata, Yoshihisa Kishiyama, Tooru Uchino, Yuta Sagae
  • Patent number: 8843171
    Abstract: To provide a transmission power control method, base station apparatus and mobile station apparatus for enabling the transmission power in the mobile station apparatus having a plurality of antennas to be properly controlled, enabled is one of a common control mode for transmitting a common TPC command to perform transmission power control common to antennas (102a, 102b) to the mobile station apparatus (100) and an individual control mode for transmitting individual TPC commands to perform transmission power control individually on the antennas (102a, 102b) to the mobile station apparatus (100).
    Type: Grant
    Filed: September 18, 2009
    Date of Patent: September 23, 2014
    Assignee: NTT DoCoMo, Inc.
    Inventors: Daisuke Nishikawa, Yoshihisa Kishiyama, Mamoru Sawahashi
  • Patent number: 8797990
    Abstract: To efficiently use radio resources used in transmission of SRS, a base station apparatus (eNode B) transmits a scheduling grant including an instruction for transmission of a Sounding Reference Signal (SRS), and a mobile station apparatus (UE) transmits the SRS in response to the scheduling grant. The SRS is transmitted in the same subframe, another subframe or a previous subframe by the predetermined number of subframes as, immediately before, or before a subframe of a PUSCH (Physical Uplink Shared Channel) that the scheduling grant instructs to transmit.
    Type: Grant
    Filed: February 15, 2011
    Date of Patent: August 5, 2014
    Assignee: NTT DoCoMo, Inc.
    Inventors: Yoshihisa Kishiyama, Teruo Kawamura, Daisuke Nishikawa
  • Patent number: 8780851
    Abstract: In a radio communication system including a mobile station and a base station apparatus for communicating with the mobile station according to a SC-FDMA scheme in uplink, the mobile station includes a transmitting unit configured to transmit at least one of a first signal and a second signal; and a Sounding RS transmitting unit configured to determine a transmission band for a Sounding Reference Signal (Sounding RS) based on mapping information of at least one of the first signal and the second signal.
    Type: Grant
    Filed: January 23, 2013
    Date of Patent: July 15, 2014
    Assignee: NTT DoCoMo, Inc.
    Inventors: Daisuke Nishikawa, Hiroyuki Ishii, Teruo Kawamura, Kenichi Higuchi
  • Publication number: 20140179363
    Abstract: The present invention is designed to provide a radio communication system which can control uplink transmission power adequately even in an HetNet environment.
    Type: Application
    Filed: July 20, 2012
    Publication date: June 26, 2014
    Applicant: NTT DOCOMO, INC.
    Inventors: Daisuke Nishikawa, Satoshi Nagata, Tetsushi Abe
  • Publication number: 20140133262
    Abstract: Provided is a method of mixing first and second liquids having mutual solubility inside a mixing flow channel formed by a micro flow channel. This method includes: causing the first and second liquids to be joined to each other inside the mixing flow channel; and forming a slug flow, in which mixing subject cells (60) formed by the joined liquid and insoluble fluid cells (63) formed by an insoluble fluid are alternately arranged, inside a flow channel at the downstream side of an insoluble fluid supply position in a manner such that the insoluble fluid having insolubility with respect to both mixing subject liquids is supplied to the joined liquid flowing through the flow channel in a direction intersecting the flow channel so that the joined liquid is divided with a gap therebetween, thereby mixing the first mixing subject liquid and the second mixing subject liquid contained in each mixing subject cell inside the downstream flow channel.
    Type: Application
    Filed: June 7, 2012
    Publication date: May 15, 2014
    Applicant: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)
    Inventors: Daisuke Nishikawa, Takeshi Yamashita, Makoto Nishimura, Koji Noishiki
  • Publication number: 20140133434
    Abstract: The present invention is designed to minimize the increase of user terminal power consumption even when downlink control channels are extended.
    Type: Application
    Filed: July 13, 2012
    Publication date: May 15, 2014
    Applicant: NTT DOCOMO, INC.
    Inventors: Kazuaki Takeda, Tetsushi Abe, Yoshihisa Kishiyama, Satoshi Nagata, Daisuke Nishikawa
  • Patent number: 8711670
    Abstract: One aspect of the present invention relates to a base station apparatus in a mobile communication system, comprising: an acquisition unit configured to receive an uplink signal from a user equipment and acquire channel condition information and an average value of the channel condition information for each of one or more frequency resource blocks; a reference metric calculation unit configured to calculate a reference metric indicative of priority of assignment of the frequency resource blocks to the user equipment based on the channel condition information and the average value of the channel condition information acquired by the acquisition unit; a modification unit configured to modify the reference metric calculated by the reference metric calculation unit with a first parameter to generate a modified metric; a scheduler configured to compare the modified metrics of the individual frequency resource blocks generated by the modification unit and determine an assignment plan of radio resources; and a transm
    Type: Grant
    Filed: March 1, 2010
    Date of Patent: April 29, 2014
    Assignee: NTT Docomo, Inc.
    Inventors: Kenichi Higuchi, Daisuke Nishikawa
  • Publication number: 20140045068
    Abstract: The present invention provides positive electrode active substance particles which are improved in charge/discharge capacities, cycle characteristics and thermal stability. The positive electrode active substance particles according to the present invention comprise a compound having at least a crystal system belonging to a space group of R-3m and a crystal system belonging to a space group of C2/m and having a specific peak intensity ratio, in which a content of Mn in the compound is controlled such that a molar ratio of Mn/(Ni+Co+Mn) therein is not less than 0.55; a content of boron in the compound is 0.01 to 1% by weight; a content of fluorine in the compound is 0.01 to 5% by weight; and a content of an element A (at least one element selected from the group consisting of Al, Mg, Ti, Zr, Ca, Fe, Zn, Mo and Bi) in the compound is 0.
    Type: Application
    Filed: March 22, 2012
    Publication date: February 13, 2014
    Applicant: TODA KOGYO CORPORATION
    Inventors: Manabu Yamamoto, Daisuke Nishikawa, Kouta Sano, Osamu Sasaki, Hideaki Sadamura
  • Patent number: 8639259
    Abstract: A base station apparatus capable of communicating with a user equipment terminal using an uplink shared channel includes a radio resource allocation unit configured to decrease frequency resources allocated to the shared channel, when transmission power of the user equipment terminal is less than a predetermined threshold.
    Type: Grant
    Filed: February 26, 2008
    Date of Patent: January 28, 2014
    Assignee: NTT DoCoMo, Inc.
    Inventors: Hiroyuki Ishii, Daisuke Nishikawa
  • Publication number: 20130343313
    Abstract: In order to prevent any increase in number of blind detections and make efficient use of radio resources even when a format of downlink control information is changed in accordance with a communication environment, the present invention provides a radio communication method for generating control information by using a predetermined DCI format out of a plurality of DCI formats including a first DCI format having an uplink scheduling grant and a second DCI format having downlink scheduling assignment. When the first DCI format is extended in size, the second DCI format is added with an information field so as to have the same size as the extended first DCI format, and information to extend an existing function of the second DCI format and/or information to add a new function is added to the information field thereby to generate the control information.
    Type: Application
    Filed: December 22, 2011
    Publication date: December 26, 2013
    Applicant: NTT DOCOMO, INC.
    Inventors: Kazuaki Takeda, Daisuke Nishikawa, Nobuhiko Miki
  • Publication number: 20130336148
    Abstract: A user equipment 10 according to the present invention is provided with a RSSI measuring unit 107 that, with regard to a predetermined sub-frame, is configured to measure a radio quality of a serving cell and a neighboring cell for all OFDM symbols within the predetermined sub-frame and that, with regard to sub-frames other than the predetermined sub-frame, is configured to measure the radio quality of the serving cell and the neighboring cell for OFDM symbols containing a reference signal within the sub-frames.
    Type: Application
    Filed: January 11, 2012
    Publication date: December 19, 2013
    Applicant: NTT DOCOMO, INC.
    Inventors: Hiroyuki Ishii, Daisuke Nishikawa, Tetsushi Abe
  • Publication number: 20130336149
    Abstract: A user equipment (10) according to the present invention includes an interference removing function capable of removing interference from a neighboring cell, a RSSI measuring unit (107) that, with regard to a predetermined sub-frame, is configured to measure a radio quality of the serving cell and the neighboring cell for all OFDM symbols within the predetermined sub-frame and that, with regard to sub-frames other than the predetermined sub-frame, is configured to measure the radio quality of the serving cell and the neighboring cell for OFDM symbols containing a reference signal within the sub-frames. The RSSI measuring unit (107) measures the radio quality using the interference removing function in consideration of a received power of a reference signal, a PSS/SSS, and a PBCH signal.
    Type: Application
    Filed: January 11, 2012
    Publication date: December 19, 2013
    Applicant: NTT DOCOMO, INC.
    Inventors: Hiroyuki Ishii, Daisuke Nishikawa, Tetsushi Abe
  • Publication number: 20130310105
    Abstract: One aspect of the present invention relates to a mobile station having a SAR backoff function including a SAR signaling receiving unit configured to receive a SAR signaling from a base station, the SAR signaling indicating that a SAR backoff is available, and a maximum transmit power determination unit configured to determine maximum transmit power of the mobile station depending on whether the SAR signaling receiving unit has received the SAR signaling, wherein in response to receiving the SAR signaling at the SAR signaling receiving unit, the maximum transmit power determination unit applies a power reduction factor associated with the SAR backoff to determine the maximum transmit power.
    Type: Application
    Filed: March 15, 2012
    Publication date: November 21, 2013
    Applicant: NTT DOCOMO, INC.
    Inventors: Yuta Sagae, Daisuke Nishikawa, Hiroyuki Ishii
  • Publication number: 20130208690
    Abstract: It is an object of the present invention to adequately report the SRS transmission timing and SRS parameters to a mobile terminal apparatus, when an aperiodic SRS is adopted, and efficiently use radio resources to be used for SRS transmission. A radio base station apparatus that reports SRS transmission control information to a mobile terminal apparatus and controls transmission of an SRS by the mobile terminal apparatus, and the radio base station apparatus has an SRS setting section that selects bit information to report to the mobile terminal apparatus, from a table having bit information to indicate not to trigger the SRS and bit information to indicate to trigger the SRS using a default SRS parameter, and a reporting section that reports the bit information for the mobile terminal apparatus using a downlink control channel.
    Type: Application
    Filed: October 3, 2011
    Publication date: August 15, 2013
    Applicant: NTT DOCOMO, INC.
    Inventors: Daisuke Nishikawa, Kazuaki Takeda, Tetsushi Abe, Yoshihisa Kishiyama