Patents by Inventor Hideyuki Moroga
Hideyuki Moroga 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: 11729764Abstract: A terminal is disclosed including a processor that assumes a position of an additional demodulation reference signal (DMRS) based on a value corresponding to whether frequency hopping is enabled or disabled; and a transmitter that transmits the additional DMRS according to an allocation duration of an uplink shared channel (PUSCH). In other aspects, a radio communication method and a base station are also disclosed.Type: GrantFiled: April 5, 2018Date of Patent: August 15, 2023Assignee: NTT DOCOMO, INC.Inventors: Yuki Matsumura, Hideyuki Moroga, Satoshi Nagata, Yuichi Kakishima
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Patent number: 11671216Abstract: A radio transmission device includes a transmitter (209) and a controller (203). The transmitter (209) transmits a radio signal in which a demodulation reference signal is mapped. When a plurality of the demodulation reference signals are to be mapped respectively to first and second unit resources consecutive in a time domain of the radio signal, the controller (203) applies the same sequence to each of the plurality of the demodulation reference signals to be mapped to the first and the second unit resources.Type: GrantFiled: February 16, 2018Date of Patent: June 6, 2023Assignee: NTT DOCOMO, INC.Inventors: Hideyuki Moroga, Yuki Matsumura, Kazuki Takeda, Satoshi Nagata, Yuichi Kakishima
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Patent number: 11595997Abstract: A user terminal is disclosed, where a band to use is limited to a partial narrow band in a system band. The user terminal includes a transmitter that transmits and/or a receiver that receives a signal, and a controller that controls repetitious reception and/or repetitious transmission of a control channel in a random access procedure based on a coverage enhancement level for a random access channel. A radio base station that communicates with a user terminal is also disclosed, where a band to use is limited to a partial narrow band in a system band. The radio base station includes a transmitter that transmits and/or a receiver that receives a signal, and a controller that controls to transmit information to make the user terminal control repetitious reception and/or repetitious transmission of a control channel in a random access procedure based on a coverage enhancement level for a random access channel.Type: GrantFiled: September 23, 2016Date of Patent: February 28, 2023Assignee: NTT DOCOMO, INC.Inventors: Hideyuki Moroga, Kazuaki Takeda, Huiling Jiang, Liu Liu, Qin Mu
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Patent number: 11575477Abstract: User equipment for communicating with a base station includes a processing unit, wherein when transmitting a physical uplink shared channel (PUSCH) to the base station prior to establishment of a radio resource control (RRC) connection between the base station and the user equipment, the processing unit controls frequency hopping applied to the PUSCH and a demodulation reference signal; a reception unit for receiving from the base station information indicating that frequency hopping is applied to the PUSCH; and a transmission unit for transmitting the PUSCH and the demodulation reference signal to which frequency hopping is applied; wherein the demodulation reference signal for demodulating a single PUSCH is formed of one front-loaded demodulation reference signal and one additional demodulation reference signal, and when the duration in symbols of the PUSCH does not support one additional demodulation reference signal, the demodulation reference signal is formed of a front-loaded demodulation reference signType: GrantFiled: March 30, 2018Date of Patent: February 7, 2023Assignee: NTT DOCOMO, INC.Inventors: Hideyuki Moroga, Satoshi Nagata, Yuichi Kakishima
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Patent number: 11528709Abstract: A terminal is disclosed including a receiver that receives a signal of a downlink shared channel; and a transmitter that transmits Acknowledgement (ACK)/Negative Acknowledgement (NACK) information for the signal of the downlink shared channel using an uplink control channel in a time resource included in a plurality of time resource candidates. In other aspects, a radio communication method and a base station are also disclosed.Type: GrantFiled: August 29, 2017Date of Patent: December 13, 2022Assignee: NTT DOCOMO, INC.Inventors: Hideyuki Moroga, Kazuaki Takeda, Satoshi Nagata
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Publication number: 20220321299Abstract: When using a different frequency band such as FR4, which is different from a frequency band including FR1 and FR2, the terminal uses a phase tracking reference signal (PTRS) having a different density in at least one of a time direction and a frequency direction to perform transmission or reception of a signal using the PTRS.Type: ApplicationFiled: June 26, 2019Publication date: October 6, 2022Applicant: NTT DOCOMO, INC.Inventors: Hiroki Harada, Satoshi Nagata, Yuki Matsumura, Shohei Yoshioka, Hideyuki Moroga, Lihui Wang
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Patent number: 11374616Abstract: A terminal is disclosed including a transmitter that transmits an uplink shared channel; and a processor that determines, when frequency hopping is applied to the uplink shared channel, a symbol for a demodulation reference signal of the uplink shared channel based on a mapping type of the uplink shared channel by using a start symbol of each hop as a reference point. In other aspects, a radio communication method is also disclosed.Type: GrantFiled: February 26, 2019Date of Patent: June 28, 2022Assignee: NTT DOCOMO, INC.Inventors: Hideyuki Moroga, Satoshi Nagata, Yuichi Kakishima
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Patent number: 11303422Abstract: A user equipment (UE) includes a transmitter that transmits, to a base station (BS), Demodulation Reference Signals (DM-RSs) using Discrete Fourier Transform (DFT)-spread (s)-Orthogonal Frequency-Division Multiplexing (OFDM). The resource elements (REs) that do not multiplex the DM-RSs in an OFDM symbol are set as Null. The transmission power for transmission of the DM-RSs is different from transmission power for transmission of normal DM-RSs. The normal DM-RS is a DM-RS using a Cyclic Prefix (CP)-OFDM. The UE further includes a processor that determines the transmission power for the DM-RSs based on a reciprocal of frequency multiplexing density of the DM-RSs. The transmission power for the DM-RSs is two times more than the normal DM-RSs when a configuration of the DM-RSs is a DM-RS configuration type 1. The transmission power for the DM-RSs is three times more than the normal DM-RSs when a configuration of the DM-RSs is a DM-RS configuration type 2.Type: GrantFiled: November 19, 2018Date of Patent: April 12, 2022Assignee: NTT DOCOMO, INC.Inventors: Yuichi Kakishima, Hideyuki Moroga, Satoshi Nagata
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Patent number: 11122600Abstract: A new configuration suitable for a downlink single carrier is provided in a downlink control signal of a radio communication system of the future. A user terminal includes: a reception section that receives a downlink signal including a downlink control signal and a downlink data signal; and a demodulation and decoding section that uses the downlink control signal to demodulate and decode the downlink data signal, in which the downlink control signal is mapped to signal transmission points of a single carrier in units of control channel elements.Type: GrantFiled: November 30, 2017Date of Patent: September 14, 2021Assignee: NTT DOCOMO, INC.Inventors: Hideyuki Moroga, Kazuaki Takeda, Satoshi Nagata
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Patent number: 11108611Abstract: In user terminal 20, reception section 204 receives one or more downlink signals mapped to a plurality of signal transmission points in a single carrier, and extraction section 214 extracts at least one of the one or more downlink signals that is assigned to at least one of the signal transmission points that belongs to a resource block group associated with user terminal 20, in which the resource block group is in units of a predetermined number of signal transmission points and the at least one of the one or more downlink signals is extracted based on a definition of the resource block group. This processing makes it possible to multiplex downlink signals for a plurality of terminals in a single-carrier transmission.Type: GrantFiled: February 1, 2018Date of Patent: August 31, 2021Assignee: NTT DOCOMO, INC.Inventors: Hideyuki Moroga, Kazuaki Takeda, Satoshi Nagata
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Patent number: 11089574Abstract: The present invention is designed to optimize the uplink access procedure even when the band to use is limited to partial narrow bands in a system band. A user terminal, in which the band to use is limited to a partial narrow band in a system band, has a receiving section that receives system information that includes indication information of an uplink carrier frequency, from a radio base station, as system information for narrow bands, which is different from system information for the system band, and a transmission section that transmits a random access preamble to the radio base station in one of a plurality of narrow bands that are specified by the indication information of the uplink carrier frequency.Type: GrantFiled: October 9, 2015Date of Patent: August 10, 2021Assignee: NTT DOCOMO, INC.Inventors: Kazuaki Takeda, Shimpei Yasukawa, Hideyuki Moroga, Satoshi Nagata
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Patent number: 11057845Abstract: Provided is a user equipment in a radio communication system including a base station and the user equipment. The user equipment includes: an acquisition unit that acquires a first transmission power parameter in a case of using OFDM in an uplink and a second transmission power parameter in a case of using DFT-s-OFDM in the uplink; and a control unit that controls transmission power of an uplink signal by using the first transmission power parameter in a case of using ODFM in the uplink, and controls transmission power of the uplink signal by using the second transmission power parameter in a case of using DFT-s-OFDM in the uplink.Type: GrantFiled: August 22, 2017Date of Patent: July 6, 2021Assignee: NTT DOCOMO, INC.Inventors: Hideyuki Moroga, Yuki Matsumura, Kazuki Takeda, Kazuaki Takeda, Satoshi Nagata
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Publication number: 20210168837Abstract: A terminal is disclosed including a processor that assumes a position of an additional demodulation reference signal (DMRS) based on a value corresponding to whether frequency hopping is enabled or disabled; and a transmitter that transmits the additional DMRS according to an allocation duration of an uplink shared channel (PUSCH). In other aspects, a radio communication method and a base station are also disclosed.Type: ApplicationFiled: April 5, 2018Publication date: June 3, 2021Applicant: NTT Docomo, Inc.Inventors: Yuki MATSUMURA, Hideyuki MOROGA, Satoshi NAGATA, Yuichi KAKISHIMA
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Patent number: 11012280Abstract: In user terminal 20, control section 202 determines signal waveforms according to a signal-waveform switching pattern notified by control section 102 of base station 10, and indicates the signal waveforms to preprocessing section 205, signal detection section 207, and post-processing section 208 for each TTI. Configuration IDs are assigned to respective signal-waveform switching patterns, and signal waveforms that are to be transmitted in TTIs and that are specified by the TTI index are configured for each of the Configuration IDs. With this configuration, a plurality of signal waveforms whose symbol lengths are different from one signal waveform to another are used together while no symbol spans two adjacent TTIs.Type: GrantFiled: January 31, 2018Date of Patent: May 18, 2021Assignee: NTT DOCOMO, INC.Inventors: Hideyuki Moroga, Kazuaki Takeda, Kazuki Takeda, Satoshi Nagata
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Patent number: 11012279Abstract: A user equipment according to one embodiment of the present invention includes a reception unit that receives signal waveform configuration information related to either or both of a multicarrier scheme and a single carrier scheme to be applicable in uplink communication from a base station, a setting unit that sets the received signal waveform configuration information, and a transmission unit that transmits an uplink signal in accordance with the set signal waveform configuration information.Type: GrantFiled: August 25, 2017Date of Patent: May 18, 2021Assignee: NTT DOCOMO, INC.Inventors: Hideyuki Moroga, Kazuaki Takeda, Kazuki Takeda, Satoshi Nagata
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Patent number: 10993129Abstract: The present invention is designed to measure and/or report CSI (Channel State Information) of a plurality of narrow bands, even when the band to use is limited to a partial narrow band in a system band. According to one aspect of the present invention, a user terminal, in which the band to use is limited to a partial narrow band in a system band, has a receiving section that receives information related to CSI (Channel State Information) measurement in a narrow band, a measurement section that measures CSIs in a plurality of narrow bands based on the information related to CSI measurement, and a transmission section that reports the measured CSIs.Type: GrantFiled: January 21, 2016Date of Patent: April 27, 2021Assignee: NTT DOCOMO, INC.Inventors: Kazuaki Takeda, Shimpei Yasukawa, Satoshi Nagata, Hideyuki Moroga, Liu Liu, Qin Mu
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Publication number: 20210068112Abstract: A terminal is disclosed including a receiver that receives a signal of a downlink shared channel; and a transmitter that transmits Acknowledgement (ACK)/Negative Acknowledgement (NACK) information for the signal of the downlink shared channel using an uplink control channel in a time resource included in a plurality of time resource candidates. In other aspects, a radio communication method and a base station are also disclosed.Type: ApplicationFiled: August 29, 2017Publication date: March 4, 2021Applicant: NTT DOCOMO, INC.Inventors: Hideyuki Moroga, Kazuaki Takeda, Satoshi Nagata
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Publication number: 20210058203Abstract: User equipment for communicating with a base station includes a processing unit, wherein when transmitting a physical uplink shared channel (PUSCH) to the base station prior to establishment of a radio resource control (RRC) connection between the base station and the user equipment, the processing unit controls frequency hopping applied to the PUSCH and a demodulation reference signal; a reception unit for receiving from the base station information indicating that frequency hopping is applied to the PUSCH; and a transmission unit for transmitting the PUSCH and the demodulation reference signal to which frequency hopping is applied; wherein the demodulation reference signal for demodulating a single PUSCH is formed of one front-loaded demodulation reference signal and one additional demodulation reference signal, and when the duration in symbols of the PUSCH does not support one additional demodulation reference signal, the demodulation reference signal is formed of a front-loaded demodulation reference signType: ApplicationFiled: March 30, 2018Publication date: February 25, 2021Applicant: NTT DOCOMO, INC.Inventors: Hideyuki Moroga, Satoshi Nagata, Yuichi Kakishima
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Publication number: 20210037518Abstract: A user apparatus includes a processing unit configured to determine a density with which a phase correction reference signal corresponding to a data channel including control information is arranged in a physical resource and a transmission unit configured to transmit a radio signal including a physical resource, in which the phase correction reference signal with the determined density and the data channel including the control information are arranged, to a base station apparatus.Type: ApplicationFiled: March 30, 2018Publication date: February 4, 2021Applicant: NTT DOCOMO, INC.Inventors: Hideyuki Moroga, Yuki Matsumura, Satoshi Nagata, Yuichi Kakishima
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Publication number: 20200412406Abstract: A terminal is disclosed including a transmitter that transmits an uplink shared channel; and a processor that determines, when frequency hopping is applied to the uplink shared channel, a symbol for a demodulation reference signal of the uplink shared channel based on a mapping type of the uplink shared channel by using a start symbol of each hop as a reference point. In other aspects, a radio communication method is also disclosed.Type: ApplicationFiled: February 26, 2019Publication date: December 31, 2020Applicant: NTT DOCOMO, INC.Inventors: Hideyuki Moroga, Satoshi Nagata, Yuichi Kakishima