Patents by Inventor Yoshikazu Kakura

Yoshikazu Kakura 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: 11962521
    Abstract: In order to enable control related to radio communication to be performed more appropriately when radio transmission schemes coexist, a radio communication apparatus according to an example aspect of the present invention includes a radio communication processing unit configured to perform communication using a first radio transmission scheme within a frequency band, wherein the radio communication processing unit is configured to perform communication using a second radio transmission scheme within a bandwidth part of the frequency band, radio resources within the bandwidth part being allocable for communication using the second radio transmission scheme.
    Type: Grant
    Filed: April 21, 2022
    Date of Patent: April 16, 2024
    Assignee: NEC CORPORATION
    Inventor: Yoshikazu Kakura
  • Publication number: 20240089043
    Abstract: A device and method in which a plurality of Zadoff-Chu sequences is allocated to a frame, a value of a parameter in the Zadoff-Chu sequence is different among the plurality of Zadoff-Chu sequences, and the Zadoff-Chu sequence allocated to the frame is different among a plurality of cells.
    Type: Application
    Filed: November 15, 2023
    Publication date: March 14, 2024
    Applicant: NEC Corporation
    Inventors: Kengo OKETANI, Yoshikazu KAKURA
  • Publication number: 20240080841
    Abstract: A radio communication system includes: a plurality of cells having different scrambling sequences, respectively, wherein at least two cells communicate with at lease two user terminals connected to different serving cells; and a controller which controls the plurality of cells and provides a single scrambling sequence to said at least two cells and said at least two user terminals for control signal transmission and reception.
    Type: Application
    Filed: November 14, 2023
    Publication date: March 7, 2024
    Applicant: NEC Corporation
    Inventors: Le LIU, Yoshikazu Kakura, Naoto Ishll, Takamichi Inoue
  • Patent number: 11870714
    Abstract: A device and method in which a plurality of Zadoff-Chu sequences is allocated to a frame, a value of a parameter in the Zadoff-Chu sequence is different among the plurality of Zadoff-Chu sequences, and the Zadoff-Chu sequence allocated to the frame is different among a plurality of cells.
    Type: Grant
    Filed: December 29, 2021
    Date of Patent: January 9, 2024
    Assignee: NEC CORPORATION
    Inventors: Kengo Oketani, Yoshikazu Kakura
  • Patent number: 11864180
    Abstract: A radio communication system includes: a plurality of cells having different scrambling sequences, respectively, wherein at least two cells communicate with at lease two user terminals connected to different serving cells; and a controller which controls the plurality of cells and provides a single scrambling sequence to said at least two cells and said at least two user terminals for control signal transmission and reception.
    Type: Grant
    Filed: April 14, 2023
    Date of Patent: January 2, 2024
    Assignee: NEC CORPORATION
    Inventors: Le Liu, Yoshikazu Kakura, Naoto Ishii, Takamichi Inoue
  • Publication number: 20230337248
    Abstract: To solve a problem that although the increase of the number of frequency blocks by allocating discontinuous subcarriers (RBs) as in OFDM enables an increase in multi-diversity effect and an improvement in throughput, the number of RB allocation patterns increases with the increase of the number of frequency blocks, resulting in an increase in the amount of information relating to the allocated RBs, the resource block allocation unit is determined when resource blocks discontinuous on the frequency axis are allocated to a terminal, and the number of bits of scheduling information indicating the allocated resource blocks by using Tree Based is set to the number of bits corresponding to the determined allocation unit.
    Type: Application
    Filed: June 16, 2023
    Publication date: October 19, 2023
    Applicant: NEC CORPORATION
    Inventors: Kenji KOYANAGI, Takamichi Inoue, Le Liu, Yoshikazu Kakura
  • Publication number: 20230254858
    Abstract: A radio communication system includes: a plurality of cells having different scrambling sequences, respectively, wherein at least two cells communicate with at lease two user terminals connected to different serving cells; and a controller which controls the plurality of cells and provides a single scrambling sequence to said at least two cells and said at least two user terminals for control signal transmission and reception.
    Type: Application
    Filed: April 14, 2023
    Publication date: August 10, 2023
    Applicant: NEC Corporation
    Inventors: Le LIU, Yoshikazu KAKURA, Naoto ISHII, Takamichi INOUE
  • Patent number: 11671963
    Abstract: A radio communication system includes: a plurality of cells having different scrambling sequences, respectively, wherein at least two cells communicate with at lease two user terminals connected to different serving cells; and a controller which controls the plurality of cells and provides a single scrambling sequence to said at least two cells and said at least two user terminals for control signal transmission and reception.
    Type: Grant
    Filed: September 10, 2021
    Date of Patent: June 6, 2023
    Assignee: NEC CORPORATION
    Inventors: Le Liu, Yoshikazu Kakura, Naoto Ishii, Takamichi Inoue
  • Publication number: 20230171754
    Abstract: A base station includes a transmitter configured to transmit a downlink control information to a user equipment, the downlink control information being generated based on one of (1) a first uplink allocation information indicating a first frequency block corresponding to a first plurality of subcarriers which are contiguous in frequency and (2) a second uplink allocation information indicating a second frequency block corresponding to a second plurality of subcarriers which are contiguous in frequency and a third frequency block corresponding to a third plurality of subcarriers which are contiguous in frequency, the second frequency block and the third frequency block being separated in frequency.
    Type: Application
    Filed: January 24, 2023
    Publication date: June 1, 2023
    Applicant: NEC Corporation
    Inventors: Takamichi Inoue, Kenji Koyanagi, Le Liu, Yoshikazu Kakura
  • Patent number: 11601939
    Abstract: A base station includes a transmitter configured to transmit a downlink control information to a user equipment, the downlink control information being generated based on one of (1) a first uplink allocation information indicating a first frequency block corresponding to a first plurality of subcarriers which are contiguous in frequency and (2) a second uplink allocation information indicating a second frequency block corresponding to a second plurality of subcarriers which are contiguous in frequency and a third frequency block corresponding to a third plurality of subcarriers which are contiguous in frequency, the second frequency block and the third frequency block being separated in frequency.
    Type: Grant
    Filed: October 15, 2020
    Date of Patent: March 7, 2023
    Assignee: NEC CORPORATION
    Inventors: Takamichi Inoue, Kenji Koyanagi, Le Liu, Yoshikazu Kakura
  • Publication number: 20230044557
    Abstract: A radio terminal (2) is used in a radio communication system (100) and communicates with a radio station (1). The radio terminal (2) includes a measurement unit (20). The measurement unit (20) operates to perform, using a terminal measurement procedure for executing a first terminal measurement corresponding to radio access technology applied to the radio communication system (100), a second terminal measurement of a shared frequency shared by a plurality of radio systems including the radio communication system (100).
    Type: Application
    Filed: October 18, 2022
    Publication date: February 9, 2023
    Applicant: NEC Corporation
    Inventors: Hisashi FUTAKI, Hiroaki AMINAKA, Hiroto SUGAHARA, Yoshikazu KAKURA, Kazushi MURAOKA
  • Patent number: 11528627
    Abstract: A radio terminal (2) is used in a radio communication system (100) and communicates with a radio station (1). The radio terminal (2) includes a measurement unit (20). The measurement unit (20) operates to perform, using a terminal measurement procedure for executing a first terminal measurement corresponding to radio access technology applied to the radio communication system (100), a second terminal measurement of a shared frequency shared by a plurality of radio systems including the radio communication system (100).
    Type: Grant
    Filed: April 13, 2021
    Date of Patent: December 13, 2022
    Assignee: NEC CORPORATION
    Inventors: Hisashi Futaki, Hiroaki Aminaka, Hiroto Sugahara, Yoshikazu Kakura, Kazushi Muraoka
  • Publication number: 20220295460
    Abstract: To solve a problem that although the increase of the number of frequency blocks by allocating discontinuous subcarriers (RBs) as in OFDM enables an increase in multi-diversity effect and an improvement in throughput, the number of RB allocation patterns increases with the increase of the number of frequency blocks, resulting in an increase in the amount of information relating to the allocated RBs, the resource block allocation unit is determined when resource blocks discontinuous on the frequency axis are allocated to a terminal, and the number of bits of scheduling information indicating the allocated resource blocks by using Tree Based is set to the number of bits corresponding to the determined allocation unit.
    Type: Application
    Filed: May 31, 2022
    Publication date: September 15, 2022
    Applicant: NEC Corporation
    Inventors: Kenji KOYANAGI, Takamichi Inoue, Le Liu, Yoshikazu Kakura
  • Publication number: 20220247524
    Abstract: In order to enable control related to radio communication to be performed more appropriately when radio transmission schemes coexist, a radio communication apparatus according to an example aspect of the present invention includes a radio communication processing unit configured to perform communication using a first radio transmission scheme within a frequency band, wherein the radio communication processing unit is configured to perform communication using a second radio transmission scheme within a bandwidth part of the frequency band, radio resources within the bandwidth part being allocable for communication using the second radio transmission scheme.
    Type: Application
    Filed: April 21, 2022
    Publication date: August 4, 2022
    Applicant: NEC Corporation
    Inventor: Yoshikazu Kakura
  • Patent number: 11405901
    Abstract: Provided is a technique capable of reporting resource block allocation information with no waste when an allocated resource block is reported, because in the current LTE downlink, the waste of the amount of resource allocation information increases in some cases since a restriction is imposed such that 37-bit fixed scheduling information is transmitted. A resource block group consisting of at least one or more resource blocks continuous on the frequency axis is allocated to a terminal, and the number of controlling signals for reporting allocation information indicating the allocated resource blocks is determined.
    Type: Grant
    Filed: June 11, 2020
    Date of Patent: August 2, 2022
    Assignee: NEC CORPORATION
    Inventors: Kenji Koyanagi, Takamichi Inoue, Le Liu, Yoshikazu Kakura
  • Patent number: 11395285
    Abstract: To solve a problem that although the increase of the number of frequency blocks by allocating discontinuous subcarriers (RBs) as in OFDM enables an increase in multi-diversity effect and an improvement in throughput, the number of RB allocation patterns increases with the increase of the number of frequency blocks, resulting in an increase in the amount of information relating to the allocated RBs, the resource block allocation unit is determined when resource blocks discontinuous on the frequency axis are allocated to a terminal, and the number of bits of scheduling information indicating the allocated resource blocks by using Tree Based is set to the number of bits corresponding to the determined allocation unit.
    Type: Grant
    Filed: June 17, 2020
    Date of Patent: July 19, 2022
    Assignee: NEC CORPORATION
    Inventors: Kenji Koyanagi, Takamichi Inoue, Le Liu, Yoshikazu Kakura
  • Patent number: 11337124
    Abstract: In order to make a slice that is being used by or available for a terminal apparatus, available even at a handover destination or a cell reselection destination, a first base station 100 includes: an obtaining section 141 configured to obtain information related to usage status of a slice provided by the first base station 100; and a transmission processing section 143 configured to transmit the information related to the usage status of the slice.
    Type: Grant
    Filed: March 15, 2018
    Date of Patent: May 17, 2022
    Assignee: NEC CORPORATION
    Inventors: Tomu Tamura, Yoshikazu Kakura, Hisashi Futaki
  • Patent number: 11323215
    Abstract: In order to enable control related to radio communication to be performed more appropriately when radio transmission schemes coexist, a radio communication apparatus according to an example aspect of the present invention includes a radio communication processing unit configured to perform communication using a first radio transmission scheme within a frequency band, wherein the radio communication processing unit is configured to perform communication using a second radio transmission scheme within a bandwidth part of the frequency band, radio resources within the bandwidth part being allocable for communication using the second radio transmission scheme.
    Type: Grant
    Filed: May 11, 2018
    Date of Patent: May 3, 2022
    Assignee: NEC CORPORATION
    Inventor: Yoshikazu Kakura
  • Publication number: 20220123884
    Abstract: A device and method in which a plurality of Zadoff-Chu sequences is allocated to a frame, a value of a parameter in the Zadoff-Chu sequence is different among the plurality of Zadoff-Chu sequences, and the Zadoff-Chu sequence allocated to the frame is different among a plurality of cells.
    Type: Application
    Filed: December 29, 2021
    Publication date: April 21, 2022
    Applicant: NEC Corporation
    Inventors: Kengo OKETANI, Yoshikazu KAKURA
  • Publication number: 20220030608
    Abstract: A radio communication system includes: a plurality of cells having different scrambling sequences, respectively, wherein at least two cells communicate with at lease two user terminals connected to different serving cells; and a controller which controls the plurality of cells and provides a single scrambling sequence to said at least two cells and said at least two user terminals for control signal transmission and reception.
    Type: Application
    Filed: September 10, 2021
    Publication date: January 27, 2022
    Inventors: Le LIU, Yoshikazu KAKURA, Naoto ISHII, Takamichi INOUE