Patents by Inventor Naoto Okubo

Naoto Okubo 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: 20190222363
    Abstract: Disclosed are a method for transmitting Hybrid Automatic Repeat Request (HARQ) feedback information, a user equipment, and a base station. The method includes: determining a reception window of data on which HARQ binding is to be performed; detecting data in the reception window; and bundling and transmitting HARQ feedback information for the data detected in the reception window. By means of the method, the user equipment and the base station, HARD bundling can be very conveniently implemented in a Half-Duplex (HD) frequency division multiplexing system.
    Type: Application
    Filed: August 10, 2017
    Publication date: July 18, 2019
    Applicant: NTT DOCOMO INC.
    Inventors: Qin MU, Liu LIU, Huiling JIANG, Naoto OKUBO, Kazuaki TAKEDA
  • Publication number: 20190215810
    Abstract: Disclosed are a method for determining a hybrid automatic repeat request (HARQ) process number (HPN) allocated to downlink link (DL) data, a method for notifying a HPN allocated to the DL data, a method for allocating a HPN to DL data, a base station, and a user equipment. The method for determining a HPN allocated to DL data includes: receiving DL control information (DCI) associated with DL data; determining, according to the DCI, whether the DL data satisfies a predetermined condition; and when the DL data satisfies the predetermined condition, determining the HPN allocated to the DL data based on a HPN field and an additional field in the DCI.
    Type: Application
    Filed: August 10, 2017
    Publication date: July 11, 2019
    Applicant: NTT DOCOMO INC.
    Inventors: Qin MU, Liu LIU, Huiling JIANG, Naoto OKUBO, Kazuaki TAKEDA
  • Publication number: 20190182633
    Abstract: Disclosed are a method for a base station to perform service indication, a method for performing service discovery by a user equipment in a sleep state, a base station and a user equipment. The method for a base station to perform service indication includes: detecting upcoming services; in a case where an upcoming service is detected, generating service indication information that includes at least a portion of bits of a service identity or a temporary mobile group identity of the upcoming service; and transmitting the service indication information to a user equipment in a multicast or broadcast manner, wherein a data volume of the service instruction information is smaller than a data volume of the Single Cell-Multicast Control Channel information.
    Type: Application
    Filed: August 9, 2017
    Publication date: June 13, 2019
    Applicant: NTT DOCOMO INC.
    Inventors: Huan WANG, Qin MU, Liu LIU, Huiling JIANG, Naoto OKUBO, Kazuaki TAKEDA
  • Patent number: 10000628
    Abstract: Provided is a polyarylene sulfide resin composition which is good in strength, dimensional stability, and moldability in terms of a molded body thereof and is also capable of reducing wearing of a mold or molding machine at the time of molding of a molded body. The polyarylene sulfide resin composition contains 100 parts by mass of a polyarylene sulfide resin and 150 to 400 parts by mass of a glass bead, a sodium content of the polyarylene sulfide resin being 1,200 ppm or less, and the glass bead being surface-treated with a vinylsilane or an epoxysilane and having an average particle diameter of 30 ?m or less and a ratio between a cumulative 10% particle diameter and a cumulative 90% particle diameter {(cumulative 90% particle diameter)/(cumulative 10% particle diameter)} of 2.5 or more.
    Type: Grant
    Filed: March 28, 2014
    Date of Patent: June 19, 2018
    Assignee: LION IDEMITSU COMPOSITES CO., LTD.
    Inventors: Satoru Kinouchi, Naoto Okubo
  • Patent number: 9408085
    Abstract: The present invention is designed to perform CQI measurement for adjacent cells without making the processes in the user terminal UE complex. A base station apparatus (eNodeB #1) provided in the serving cell has features of acquiring, from a base station apparatus (eNodeB #2) provided in an adjacent cell, the cell ID of the adjacent cell, and the position and transmission power of the CSI-RS, as parameters related to the CSI-RS of the adjacent cell, generating a broadcast signal including the above parameters related to the CSI-RS, and transmitting the generated signal to the user terminal (UE).
    Type: Grant
    Filed: April 5, 2011
    Date of Patent: August 2, 2016
    Assignee: NTT DOCOMO, INC.
    Inventors: Tetsushi Abe, Hiroyuki Ishii, Naoto Okubo, Yusuke Ohwatari
  • Patent number: 9339941
    Abstract: A method punches a damper out from a damper material that is detachably attached on a flexible exfoliative member through an attaching surface of the damper material with use of a hollow punch. The method includes steps of setting the damper material on a supporting surface, positioning a projection part between the exfoliative member and the supporting surface, and punching the damper out from the damper material by cutting the damper material around the projection part by the hollow punch without punching the exfoliative member.
    Type: Grant
    Filed: August 1, 2012
    Date of Patent: May 17, 2016
    Assignee: NHK Spring Co., Ltd.
    Inventors: Koji Sotokawa, Naoto Okubo
  • Publication number: 20160032085
    Abstract: Provided is a polyarylene sulfide resin composition which is good in strength, dimensional stability, and moldability in terms of a molded body thereof and is also capable of reducing wearing of a mold or molding machine at the time of molding of a molded body. The polyarylene sulfide resin composition contains 100 parts by mass of a polyarylene sulfide resin and 150 to 400 parts by mass of a glass bead, a sodium content of the polyarylene sulfide resin being 1,200 ppm or less, and the glass bead being surface-treated with a vinylsilane or an epoxysilane and having an average particle diameter of 30 ?m or less and a ratio between a cumulative 10% particle diameter and a cumulative 90% particle diameter {(cumulative 90% particle diameter)/(cumulative 10% particle diameter)} of 2.5 or more.
    Type: Application
    Filed: March 28, 2014
    Publication date: February 4, 2016
    Applicant: LION IDEMITSU COMPOSITES CO., LTD.
    Inventors: Satoru KINOUCHI, Naoto OKUBO
  • Patent number: 9220020
    Abstract: A user apparatus transmits an uplink control signal to a base station apparatus using a single carrier scheme. The user apparatus includes: a unit configured to prepare acknowledgement information indicating positive acknowledgement or negative acknowledgement for a downlink data signal based on a result of demodulation of the downlink data signal; a unit configured to prepare channel state information indicating reception quality of a downlink reference signal; a unit configured to channel-code multiplexed control information in which the acknowledgement information and the channel state information are multiplexed to prepare the uplink control signal; and a unit configured to transmit the uplink control signal using dedicated resources different from resources for an uplink data signal.
    Type: Grant
    Filed: March 13, 2008
    Date of Patent: December 22, 2015
    Assignee: NTT DOCOMO, INC.
    Inventors: Naoto Okubo, Hiroyuki Ishii, Nobuhiko Miki, Kenichi Higuchi, Yoshihisa Kishiyama
  • Patent number: 9137803
    Abstract: The present invention provides a radio communication control method, in a communication system in which the system band is widened by aggregating a plurality of fundamental frequency blocks, that is suitable to transmit a downlink shared channel and its downlink control channel in different fundamental frequency blocks. According to this radio communication control method, a normal component carrier and an concatenated component carrier are selected for radio communication with a user terminal, and resources are allocated such that, in the event the user terminal is a terminal of LTE specifications which can support up to a fundamental frequency block, communication is made possible based on the LTE specifications using only the fundamental frequency block, and, in the event the user terminal is a terminal of the LTE-A specifications which can support up to the concatenated frequency block, communication is performed based on the LTE specifications using the concatenated frequency block.
    Type: Grant
    Filed: December 6, 2010
    Date of Patent: September 15, 2015
    Assignee: NTT DOCOMO, INC.
    Inventors: Nobuhiko Miki, Hiroyuki Ishii, Naoto Okubo
  • Patent number: 9031012
    Abstract: A radio base station (eNB) according to the present invention includes: a determination unit (14) configured to determine an assignable OFDM symbol number indicating the number of OFDM symbols in each subcarrier assignable to a control channel in a downlink, in each subframe configured by a predetermined number of OFDM symbols, wherein the determination unit (14) is configured to calculate an OFDM symbol number corresponding to a communication status, in each subframe within a measurement interval, and to set a maximum number of the calculated OFDM symbol numbers to the assignable OFDM symbol number in each subframe within a next control interval that starts after completion of the measurement interval.
    Type: Grant
    Filed: November 6, 2009
    Date of Patent: May 12, 2015
    Assignee: NTT DOCOMO, INC.
    Inventors: Naoto Okubo, Hiroyuki Ishii
  • Patent number: 8982817
    Abstract: The present invention maintains communication even during a transition period in which ON/OFF of the CIF is switched by higher layer signaling or during a transition period in which the number of component carrier aggregations is increased/decreased. In a radio communication system in which an LTE-A system, in which an LTE-A system to add or remove the frequency band to assign for communication between a base station apparatus (20) and a mobile terminal apparatus (10) on a per component carrier basis, and an LTE system to perform communication between the base station apparatus (20) and the mobile terminal apparatus (10) using one fixed fundamental frequency block, are arranged in an overlapping manner, in the LTE-A system, one of the fundamental frequency blocks assigned to the mobile terminal apparatus (10) is determined as an anchor block, and the anchor block supports the same operation as in the LTE system.
    Type: Grant
    Filed: February 15, 2011
    Date of Patent: March 17, 2015
    Assignee: NTT DOCOMO, Inc.
    Inventors: Nobuhiko Miki, Anil Umesh, Naoto Okubo
  • Patent number: 8954085
    Abstract: A base station allocates a radio resource to a scheduling-target user based on a scheduling metric which is calculated for each of scheduling-target users and calculates the amount of available data for each user. When the radio resource is allocated to the scheduling-target user, the amount of data (Dassign) to be communicated using the allocated radio resource is subtracted from the amount of available data (Davailable) for the user. The amount of available data (Davailable) for each user within a cell is updated (min((Davailable+Dref), Dref)) to be less than or equal to a reference data amount in each control period (TAMBR). The scheduling-target user is selected based on the amount of available data for each user.
    Type: Grant
    Filed: April 7, 2011
    Date of Patent: February 10, 2015
    Assignee: NTT DOCOMO, INC.
    Inventors: Naoto Okubo, Yoshiaki Ofuji, Hiroyuki Ishii, Anil Umesh, Kohei Kiyoshima, Tadashi Uchiyama
  • Patent number: 8897284
    Abstract: A radio base station (eNB) according to the present invention includes: an RI acquisition unit (11) configured to acquire, from a mobile station (UE), an “RI” indicating number of streams determined by the mobile station (UE); an adjustment unit (12) configured to adjust the “RI” acquired by the RI acquisition unit (11), by using an offset value “RI offset” unique to the mobile station (UE); and a stream-number determination unit (13) configured to determine the number of streams to be simultaneously transmitted to the mobile station (UE), based on the “RI” adjusted by the adjustment unit (12).
    Type: Grant
    Filed: December 15, 2009
    Date of Patent: November 25, 2014
    Assignee: NTT DoCoMo, Inc.
    Inventors: Yoshiaki Ofuji, Naoto Okubo
  • Patent number: 8842627
    Abstract: A radio base station (eNB) according to the present invention includes: a management unit (11) configured to manage the number of mobile stations UE corresponding to each carrier; and a scheduling unit (12) configured to perform a scheduling processing to a scheduling-target mobile station (UE#A), in which the “CA” is set to be performed, in at least one of a primary carrier (carrier #1) and a secondary carrier (carrier #2) of the mobile station UE#A based on the number of mobile stations UE corresponding to each carrier.
    Type: Grant
    Filed: March 3, 2011
    Date of Patent: September 23, 2014
    Assignee: NTT DoCoMo, Inc.
    Inventors: Kohei Kiyoshima, Naoto Okubo, Hiroyuki Ishii
  • Patent number: 8743728
    Abstract: A radio base station eNB according to the present invention includes: a CQI reception unit 11 configured to receive CQI in PDSCH from a mobile station UE; a CQI adjustment unit 13 configured to adjust the received CQI based on a transmission acknowledgement result for a downlink data signal transmitted via the PDSCH; a selectable TF number calculation unit 22 configured to calculate a selectable maximum transport block size based on the number of mobile stations UE in each scheduling unit period; and an MCS selection unit 15 configured to select a modulation scheme and a coding rate, which are to be applied to each resource blocks in the PDSCH, based on the adjusted CQI and a transmission format corresponding to the calculated selectable maximum transport block size.
    Type: Grant
    Filed: September 13, 2010
    Date of Patent: June 3, 2014
    Assignee: NTT DoCoMo, Inc.
    Inventors: Naoto Okubo, Hiroyuki Ishii, Sadayuki Abeta
  • Patent number: 8724569
    Abstract: A radio base station includes a resource assignment unit for assigning a resource candidate for transmitting a semi-persistent scheduling transmission acknowledgement signal to a first mobile station during a semi-persistent scheduling bearer setting process. The resource candidate for transmitting a semi-persistent scheduling transmission acknowledgement signal is formed by a combination of a frequency direction resource and a code direction resource by which the first mobile station transmits a transmission acknowledgement signal after a predetermined timing from a timing of receiving downlink data, to the downlink data that has been scheduled by semi-persistent scheduling and has been transmitted via a downlink data channel.
    Type: Grant
    Filed: March 24, 2010
    Date of Patent: May 13, 2014
    Assignee: NTT DoCoMo, Inc.
    Inventors: Kohei Kiyoshima, Hiroyuki Ishii, Naoto Okubo
  • Patent number: 8705470
    Abstract: A radio base station includes a power estimate unit configured to estimate a transmission power of an uplink signal in a mobile station (UE), a transmission format determination unit configured to determine a transmission bandwidth and a transmission frequency of the uplink signal as a transmission format of the uplink signal transmitted by the mobile station (UE), and a transmission instruction unit configured to instruct the mobile station (UE) to transmit the uplink signal by using the determined transmission format. The transmission format determination unit is configured to determine the transmission bandwidth of the uplink signal based on an estimation value of the transmission power, and to determine the transmission frequency of the uplink signal based on information relating to a cell with which the mobile station communicates.
    Type: Grant
    Filed: February 4, 2010
    Date of Patent: April 22, 2014
    Assignee: NTT DoCoMo, Inc.
    Inventors: Hiroyuki Ishii, Naoto Okubo
  • Patent number: 8687657
    Abstract: A base station apparatus determines which mode of a subframe bundling mode (second mode) and a non-bundling mode (first mode) should be used by a user apparatus for communication, and reports a determination result. In the first mode, RTT period is a first period, and each of transmission and retransmission of the signal is performed every 1 TTI. In the second mode, RTT period is a second period that is longer than the first period, and each of transmission and retransmission of the signal is performed every plurality of TTIs. A radio resource to be used for retransmission is determined according to a first frequency hopping pattern in the first mode, and is determined according to a second frequency hopping pattern that is different from the first frequency hopping pattern in the second mode.
    Type: Grant
    Filed: January 29, 2010
    Date of Patent: April 1, 2014
    Assignee: NTT DoCoMo, Inc.
    Inventors: Hiroyuki Ishii, Kohei Kiyoshima, Naoto Okubo
  • Patent number: 8565254
    Abstract: A radio base station (eNB) according to the present invention includes an aggregation level determination unit configured to determine an aggregation level based on CQI notified from a mobile station (UE), a control channel element assignment unit configured to assign a plurality of continuous CCE to a PDCCH addressed to the mobile station (UE), based on the determined aggregation level, and a resource assignment unit configured to assign resource element groups constituting the assigned CCE as a resource for the PDCCH addressed to the mobile station (UE). The control channel element assignment unit is configured to assign a plurality of continuous CCE to the PDCCH addressed to the mobile station (UE) based on an aggregation level changed by the aggregation level determination unit, when failing to assign CCE to the PDCCH addressed to the mobile station (UE).
    Type: Grant
    Filed: November 6, 2009
    Date of Patent: October 22, 2013
    Assignee: NTT DoCoMo, Inc.
    Inventors: Naoto Okubo, Hiroyuki Ishii
  • Publication number: 20130188584
    Abstract: A user apparatus transmits an uplink control signal to a base station apparatus using a single carrier scheme. The user apparatus includes: a unit configured to prepare acknowledgement information indicating positive acknowledgement or negative acknowledgement for a downlink data signal based on a result of demodulation of the downlink data signal; a unit configured to prepare channel state information indicating reception quality of a downlink reference signal; a unit configured to channel-code multiplexed control information in which the acknowledgement information and the channel state information are multiplexed to prepare the uplink control signal; and a unit configured to transmit the uplink control signal using dedicated resources different from resources for an uplink data signal.
    Type: Application
    Filed: March 5, 2013
    Publication date: July 25, 2013
    Applicant: NTT DOCOMO, INC.
    Inventors: Naoto Okubo, Hiroyuki Ishii, Nobuhiko Miki, Kenichi Higuchi, Yoshihisa Kishiyama