Patents by Inventor Hidekazu SHIMODAIRA
Hidekazu SHIMODAIRA 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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Patent number: 11936441Abstract: A FrontHaul Multiplexer (FHM) for relaying communications between a signal processing device and a plurality of radio devices includes a storage unit that stores a table in which device identification information of each of the plurality of radio devices is associated with beam identification information assigned to the radio device; a scheduling information reception unit that receives, from the signal processing device, scheduling information of a user terminal performing radio communications with the plurality of radio devices; a determination unit that acquires from the table the device identification information associated with the beam identification information of uplink included in the scheduling information and then determines from the acquired device identification information the radio device in charge of the user terminal; and a transmission unit that transmits to the signal processing device an uplink signal transmitted from the determined radio device.Type: GrantFiled: November 9, 2018Date of Patent: March 19, 2024Assignee: NTT DOCOMO, INC.Inventors: Takashi Kosugi, Tatsuro Yajima, Takuto Arai, Yuta Sagae, Akihito Hanaki, Hidekazu Shimodaira, Masahiro Fujii, Yoshiaki Ofuji
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Publication number: 20230397057Abstract: A terminal includes: a reception unit that receives a first message requesting a configuration of a specific secondary cell configured with a physical uplink control channel; and a control unit that configures the specific secondary cell in response to the reception of the first message; wherein the control unit performs an activation of the specific secondary cell so as not to exceed a first request delay time in a first procedure for performing the activation of the specific secondary cell in response to receiving a second message requesting the activation of the specific secondary cell, and performs the activation of the specific secondary cell so as not to exceed a second request delay time in a second procedure for performing the activation of the specific secondary cell without depending on the second message.Type: ApplicationFiled: October 23, 2020Publication date: December 7, 2023Applicant: NTT DOCOMO, INC.Inventors: Hidekazu Shimodaira, Tomoki Yokokawa
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Patent number: 11742929Abstract: A user equipment includes a transmission unit that transmits, to a base station, information indicating a specific band combination supported by the user equipment for carrier aggregation and combinations of maximum numbers of Multiple-input and multiple-output (MIMO) layers to be applied to respective component carriers of frequency bands included in the specific band combination, the combinations of the maximum numbers of MIMO layers being supported by the user equipment; and a control unit that applies a default value as the maximum numbers of MIMO layers to be applied, by the user equipment, to the respective component carriers of the frequency bands included in the specific band combination, when a signal indicating the maximum numbers of MIMO layers to be applied, by the base station, to the respective component carriers of the frequency bands included in the specific band combination is not received from the base station.Type: GrantFiled: February 25, 2019Date of Patent: August 29, 2023Assignee: NTT DOCOMO, INC.Inventors: Hideaki Takahashi, Akihito Hanaki, Hidekazu Shimodaira
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Publication number: 20220103240Abstract: A user equipment includes a transmission unit that transmits, to a base station, information indicating a specific band combination supported by the user equipment for carrier aggregation and combinations of maximum numbers of Multiple-input and multiple-output (MIMO) layers to be applied to respective component carriers of frequency bands included in the specific band combination, the combinations of the maximum numbers of MIMO layers being supported by the user equipment; and a control unit that applies a default value as the maximum numbers of MIMO layers to be applied, by the user equipment, to the respective component carriers of the frequency bands included in the specific band combination, when a signal indicating the maximum numbers of MIMO layers to be applied, by the base station, to the respective component carriers of the frequency bands included in the specific band combination is not received from the base station.Type: ApplicationFiled: February 25, 2019Publication date: March 31, 2022Applicant: NTT DOCOMO, INC.Inventors: Hideaki Takahashi, Akihito Hanaki, Hidekazu Shimodaira
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Publication number: 20220030517Abstract: A user apparatus is provided that includes: a reception unit configured to receive a first MIMO (Multiple Input Multiple Output) layer number and a second MIMO layer number from a base station apparatus; a control unit configured to select the first MIMO layer number or the second MIMO layer number based on a communication state; and a communication unit configured to perform communication using the selected MIMO layer number, wherein the first MIMO layer number is a MIMO layer number configured for a default BWP (Bandwidth Part) or an initial BWP and the second MIMO layer number is a MIMO layer number configured for each cell.Type: ApplicationFiled: October 25, 2019Publication date: January 27, 2022Applicant: NTT DOCOMO, INC.Inventors: Hideaki Takahashi, Hidekazu Shimodaira, Kazuaki Takeda
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Publication number: 20220014236Abstract: An FHM for relaying communications between a signal processing device and a plurality of radio devices comprises: a storage unit that stores a table in which device identification information of each of the plurality of radio devices is associated with beam identification information assigned to the radio device; a scheduling information reception unit that receives, from the signal processing device, scheduling information of a user terminal performing radio communications with the plurality of radio devices; a determination unit that acquires from the table the device identification information associated with the beam identification information of uplink included in the scheduling information and then determines from the acquired device identification information the radio device in charge of the user terminal; and a transmission unit that transmits to the signal processing device an uplink signal transmitted from the determined radio device.Type: ApplicationFiled: November 9, 2018Publication date: January 13, 2022Applicant: NTT DOCOMO, INC.Inventors: Takashi Kosugi, Tatsuro Yajima, Takuto Arai, Yuta Sagae, Akihito Hanaki, Hidekazu Shimodaira, Masahiro Fujii, Yoshiaki Ofuji
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Patent number: 9973364Abstract: In 60 GHz WiGig/IEEE 802.11ad, Orthogonal Frequency Division Multiplexing (OFDM) is used to achieve higher throughput. However, OFDM has one problem of high Peak-to-Average Power Ratio (PAPR) caused by the summing up of the large number of subcarriers. A high PAPR signal degrades the efficiency of power amplifier (PA) and may cause spurious emissions because of the PA non linearity. In order to reduce PAPR, Generalized Frequency Division Multiplexing (GFDM) which has the characteristics of both single carrier and multi carrier transmission has been studied. By introducing GFDM, the number of subcarriers can be decreased while still maintaining a high throughput.Type: GrantFiled: June 27, 2016Date of Patent: May 15, 2018Assignee: INTEL IP CORPORATIONInventors: Hidekazu Shimodaira, Ali Sadri, Joongheon Kim
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Publication number: 20170373903Abstract: In 60 GHz WiGig/IEEE 802.11ad, Orthogonal Frequency Division Multiplexing (OFDM) is used to achieve higher throughput. However, OFDM has one problem of high Peak-to-Average Power Ratio (PAPR) caused by the summing up of the large number of subcarriers. A high PAPR signal degrades the efficiency of power amplifier (PA) and may cause spurious emissions because of the PA non linearity. In order to reduce PAPR, Generalized Frequency Division Multiplexing (GFDM) which has the characteristics of both single carrier and multi carrier transmission has been studied. By introducing GFDM, the number of subcarriers can be decreased while still maintaining a high throughput.Type: ApplicationFiled: June 27, 2016Publication date: December 28, 2017Inventors: Hidekazu SHIMODAIRA, Ali SADRI, Joongheon KIM