Patents by Inventor Takaharu Kobayashi
Takaharu Kobayashi 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).
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Publication number: 20230284255Abstract: A communication system includes a plurality of first communication control devices that are arranged in association with a plurality of operators, and a second communication control device that is connected to the first communication control devices. The first communication control device calculates an effect evaluation value in a case where bands used by an operator of subject are increased and reduced and transmits information containing the effect evaluation value to the second communication control device. The second communication control device specifies a combination of radio devices and a combination of operators that maximize a value of change in a case where each operator changes the used bands of the radio devices and instructs the first communication control devices corresponding to the operators of the specified combination to increase and reduce the used bands of the radio devices of the specified combination.Type: ApplicationFiled: October 11, 2022Publication date: September 7, 2023Applicant: Fujitsu LimitedInventor: Takaharu Kobayashi
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Publication number: 20230247510Abstract: A communication control apparatus includes a memory, and a processor coupled to the memory. The processor is configured to determine, by using metrics related to a first value and a second value, first remainders of divisions of a cell identifier respectively by the first value and the second value, determine a second remainder of a division of the cell identifier by the least common multiple of the first value and second value, by using the first remainders, determine a third remainder of a division of the cell identifier by the least common multiple of the first value, the second value, and a third value, by using the second remainder and a metric related to the third value, and determine a cell identifier that satisfies the third remainder.Type: ApplicationFiled: October 4, 2022Publication date: August 3, 2023Applicant: Fujitsu LimitedInventors: Takaharu Kobayashi, MASAYUKI ONO
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Publication number: 20220272700Abstract: A communication control apparatus allocates, to a plurality of operators, a band of each of a plurality of radio units that are shared by the operators and that are connected to a plurality of baseband units managed by the operators. The communication control apparatus includes: a memory; a processor that allocates the band of each of the radio units to the operators in accordance with an upper band use limit that is set for each of the radio units such that a use band used by the operators does not exceed the upper band use limit; and an output unit that outputs allocation information indicating the band allocated to the operators by the processor to each of the baseband units.Type: ApplicationFiled: November 23, 2021Publication date: August 25, 2022Applicant: FUJITSU LIMITEDInventor: Takaharu Kobayashi
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Patent number: 11178560Abstract: A base station that includes: a memory; and a processor that is connected to the memory and that is configured to: select one or more terminals to communicate with from plural terminals with which communication is possible using metric values calculated using an error correction offset value corresponding to a number of terminals being selected; and decide on at least one of a modulation scheme or a coding rate for each terminal selected.Type: GrantFiled: August 20, 2018Date of Patent: November 16, 2021Assignee: FUJITSU LIMITEDInventor: Takaharu Kobayashi
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Patent number: 10425931Abstract: A base station includes a control unit that controls one or more identifiers to be installed on a plurality of transmission points in accordance with the number of control signals transmitted from the transmission points to one or more wireless terminals or the number of radio resources used to transmit the control signals to the one or more wireless terminals.Type: GrantFiled: March 30, 2016Date of Patent: September 24, 2019Assignee: FUJITSU LIMITEDInventor: Takaharu Kobayashi
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Patent number: 10348369Abstract: A transmission control device includes an acquiring unit that acquires propagation delay time for each propagation path between a plurality of terminal devices and a plurality of transmitter stations; a selector that selects, based on the propagation delay time acquired by the acquiring unit, combinations of terminal devices having similar propagation delay differences from the plurality of the transmitter stations; and a controller that controls transmission timing of the plurality of the transmitter stations that transmit signals to the combinations of the terminal devices selected by the selector.Type: GrantFiled: June 20, 2017Date of Patent: July 9, 2019Assignee: FUJITSU LIMITEDInventors: Takashi Dateki, Takashi Seyama, Takaharu Kobayashi
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Publication number: 20190069191Abstract: A base station that includes: a memory; and a processor that is connected to the memory and that is configured to: select one or more terminals to communicate with from plural terminals with which communication is possible using metric values calculated using an error correction offset value corresponding to a number of terminals being selected; and decide on at least one of a modulation scheme or a coding rate for each terminal selected.Type: ApplicationFiled: August 20, 2018Publication date: February 28, 2019Applicant: FUJITSU LIMITEDInventor: Takaharu KOBAYASHI
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Patent number: 10218417Abstract: A communication device that is configured to: compute reflected transmission weights based on timing correction coefficients to be applied to each of a plurality of antennas according to reception timings of uplink signals from a plurality of wireless terminals that receive multiplexed downlink signals transmitted from the plurality of antennas, and on respective channel estimation values between the plurality of antennas and the plurality of wireless terminals, the computed reflected transmission weights reflecting the timing correction coefficients and being computed at first frequency intervals; compute interpolated transmission weights by interpolating between the computed reflected transmission weights at second frequency intervals that are narrower than the first frequency intervals; and compute transmission weights to be applied to downlink signals by, based on the timing correction coefficients, correcting the interpolated transmission weights that have been interpolated such that the timing correctioType: GrantFiled: March 6, 2018Date of Patent: February 26, 2019Assignee: FUJITSU LIMITEDInventor: Takaharu Kobayashi
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Patent number: 10194404Abstract: A transmission control apparatus determines a group of terminal devices that are destinations to which signals are simultaneously transmitted out of a plurality of terminal devices. The transmission control apparatus includes a processor that executes a process including: calculating received power vectors corresponding to received power of the respective terminal devices; determining, based on an inner product between a received power vector of a first terminal device that is determined to belong to the group of terminal devices already and a received power vector of a second terminal device that is a candidate to be newly added to the group of terminal devices, whether to add the second terminal device to the group of terminal devices; and generating transmission signals to be transmitted to a group of terminal devices that are determined in accordance with determination at the determining.Type: GrantFiled: September 21, 2017Date of Patent: January 29, 2019Assignee: FUJITSU LIMITEDInventor: Takaharu Kobayashi
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Patent number: 10154504Abstract: A communication system includes a first base station that forms a first coverage area, and a second base station that forms a second coverage area different from the first coverage area and uses a same as a radio resource to be used by the first base station, wherein the second base station determines a number of assignment streams at the second base station in the radio resource, computes a number of interference signals removable by the second base station in the radio resource based on a number of receiving antennas included in the second base station and the number of assignment streams, and notifies the first base station of the number of interference signals in the radio resource, and the first base station determines a number of assignment streams at the first base station in the radio resource by using the number of interference signals as an upper limit.Type: GrantFiled: December 13, 2016Date of Patent: December 11, 2018Assignee: FUJITSU LIMITEDInventor: Takaharu Kobayashi
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Publication number: 20180269938Abstract: A communication device that is configured to: compute reflected transmission weights based on timing correction coefficients to be applied to each of a plurality of antennas according to reception timings of uplink signals from a plurality of wireless terminals that receive multiplexed downlink signals transmitted from the plurality of antennas, and on respective channel estimation values between the plurality of antennas and the plurality of wireless terminals, the computed reflected transmission weights reflecting the timing correction coefficients and being computed at first frequency intervals; compute interpolated transmission weights by interpolating between the computed reflected transmission weights at second frequency intervals that are narrower than the first frequency intervals; and compute transmission weights to be applied to downlink signals by, based on the timing correction coefficients, correcting the interpolated transmission weights that have been interpolated such that the timing correctioType: ApplicationFiled: March 6, 2018Publication date: September 20, 2018Applicant: FUJITSU LIMITEDInventor: Takaharu Kobayashi
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Patent number: 10021707Abstract: A control device including: a processor configured to: receive first and second quality information indicating qualities of wireless signals transmitted from a first and a second base stations, determine a first and a second ratios based on the first and the second quality information, the first ratio being a ratio with which the base stations perform a coordinated transmission, the second ratio being a ratio with which the first base station performs an uncoordinated transmission, and determine a coordination pattern based on the ratios, the coordination pattern indicating a first wireless resource and a second wireless resource in a specified wireless resource, the first and the second wireless resources being allocated to the coordinated transmission and the uncoordinated transmission, the coordinated pattern being applied to a specified period including a plurality of units of period each being a unit of period for wireless transmission in a wireless communication system.Type: GrantFiled: February 17, 2016Date of Patent: July 10, 2018Assignee: FUJITSU LIMITEDInventors: Takaharu Kobayashi, Teppei Oyama
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Publication number: 20180103439Abstract: A transmission control apparatus determines a group of terminal devices that are destinations to which signals are simultaneously transmitted out of a plurality of terminal devices. The transmission control apparatus includes a processor that executes a process including: calculating received power vectors corresponding to received power of the respective terminal devices; determining, based on an inner product between a received power vector of a first terminal device that is determined to belong to the group of terminal devices already and a received power vector of a second terminal device that is a candidate to be newly added to the group of terminal devices, whether to add the second terminal device to the group of terminal devices; and generating transmission signals to be transmitted to a group of terminal devices that are determined in accordance with determination at the determining.Type: ApplicationFiled: September 21, 2017Publication date: April 12, 2018Applicant: FUJITSU LIMITEDInventor: Takaharu Kobayashi
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Publication number: 20180013470Abstract: A transmission control device includes an acquiring unit that acquires propagation delay time for each propagation path between a plurality of terminal devices and a plurality of transmitter stations; a selector that selects, based on the propagation delay time acquired by the acquiring unit, combinations of terminal devices having similar propagation delay differences from the plurality of the transmitter stations; and a controller that controls transmission timing of the plurality of the transmitter stations that transmit signals to the combinations of the terminal devices selected by the selector.Type: ApplicationFiled: June 20, 2017Publication date: January 11, 2018Applicant: FUJITSU LIMITEDInventors: TAKASHI DATEKI, Takashi Seyama, Takaharu Kobayashi
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Patent number: 9813204Abstract: A wireless communication system includes a first access point that forms a first wireless area and a second access point that forms a second wireless area. The first access point controls the scheduling of a terminal located in the first wireless area based on the state of a communication channel between a terminal which is a candidate for scheduling by the second access point and the first access point.Type: GrantFiled: January 22, 2015Date of Patent: November 7, 2017Assignee: FUJITSU LIMITEDInventors: Takaharu Kobayashi, Dai Kimura
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Patent number: 9781727Abstract: Connection destinations of a plurality of wireless terminals are selected from a plurality of connection destination candidates to maximize an evaluation value based on each of data rates in cases where each of the wireless terminals is connected to each of the connection destination candidates and each of resource allocation rates for each of the wireless terminals at each of the connection destination candidates.Type: GrantFiled: January 29, 2015Date of Patent: October 3, 2017Assignee: FUJITSU LIMITEDInventors: Takaharu Kobayashi, Dai Kimura
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Publication number: 20170238283Abstract: A base station includes a control unit that controls one or more identifiers to be installed on a plurality of transmission points in accordance with the number of control signals transmitted from the transmission points to one or more wireless terminals or the number of radio resources used to transmit the control signals to the one or more wireless terminals.Type: ApplicationFiled: March 30, 2016Publication date: August 17, 2017Inventor: Takaharu KOBAYASHI
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Patent number: 9693365Abstract: A communication control apparatus including a processor is provided. The processor is configured to calculate a first predicted communication quality of a mobile station apparatus in a state not including an interference signal from one or more cells among surrounding cells in accordance with measurement results of a quality of reception of a signal from a serving cell and strength of interference signals from the surrounding cells as measured by the mobile station apparatus, and judge permission for transmission of signals by the one or more cells in a radio resource of communication of the mobile station apparatus based on the first predicted communication quality.Type: GrantFiled: June 12, 2015Date of Patent: June 27, 2017Assignee: FUJITSU LIMITEDInventors: Toshiro Sawamoto, Dai Kimura, Takaharu Kobayashi
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Publication number: 20170094674Abstract: A communication system includes a first base station that forms a first coverage area, and a second base station that forms a second coverage area different from the first coverage area and uses a same as a radio resource to be used by the first base station, wherein the second base station determines a number of assignment streams at the second base station in the radio resource, computes a number of interference signals removable by the second base station in the radio resource based on a number of receiving antennas included in the second base station and the number of assignment streams, and notifies the first base station of the number of interference signals in the radio resource, and the first base station determines a number of assignment streams at the first base station in the radio resource by using the number of interference signals as an upper limit.Type: ApplicationFiled: December 13, 2016Publication date: March 30, 2017Applicant: FUJITSU LIMITEDInventor: Takaharu Kobayashi
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Publication number: 20160249363Abstract: A control device including: a processor configured to: receive first and second quality information indicating qualities of wireless signals transmitted from a first and a second base stations, determine a first and a second ratios based on the first and the second quality information, the first ratio being a ratio with which the base stations perform a coordinated transmission, the second ratio being a ratio with which the first base station performs an uncoordinated transmission, and determine a coordination pattern based on the ratios, the coordination pattern indicating a first wireless resource and a second wireless resource in a specified wireless resource, the first and the second wireless resources being allocated to the coordinated transmission and the uncoordinated transmission, the coordinated pattern being applied to a specified period including a plurality of units of period each being a unit of period for wireless transmission in a wireless communication system.Type: ApplicationFiled: February 17, 2016Publication date: August 25, 2016Inventors: Takaharu KOBAYASHI, Teppei Oyama