Patents by Inventor Hisashi Futaki

Hisashi Futaki 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).

  • RADIO STATION, RADIO TERMINAL APPARATUS, AND METHOD FOR THESE
    Publication number: 20220256542
    Abstract: A radio station (3) allocates a first plurality of time-frequency resources (430) and a second plurality of time-frequency resources (530) to at least one radio terminal (1, 2). The first plurality of time-frequency resources (430) are used to transmit or receive a first transport block (460) in accordance with a first transmission time interval (TTI). The first TTI is equal to a duration of one subframe (410, 510). The second plurality of time-frequency resources (530) are used to transmit or receive a second transport block (560) in accordance with a second TTI. The second TTI is shorter than the duration of the subframe (410, 510).
    Type: Application
    Filed: April 28, 2022
    Publication date: August 11, 2022
    Applicant: NEC Corporation
    Inventor: Hisashi FUTAKI
  • RADIO COMMUNICATION SYSTEM, RADIO TERMINAL, RADIO NETWORK, RADIO COMMUNICATION METHOD AND PROGRAM
    Publication number: 20220256380
    Abstract: A radio terminal, which has a function to collect and report measurement information designated by a radio network, comprises: means for receiving collection/reporting control information related to the radio terminal's execution of at least one of the collection of measurement information and the reporting of the measurement information to the radio network; and control means for executing, based on the collection/reporting control information, at least one of the collection and the reporting if execution determination information, which is related to at least one of the collection of the measurement information and the reporting of the measurement information to be executed by the local terminal, satisfies a given determination criterion.
    Type: Application
    Filed: April 26, 2022
    Publication date: August 11, 2022
    Applicant: NEC Corporation
    Inventors: Hisashi FUTAKI, Hiroaki AMINAKA
  • MASTER NODE, SECONDARY NODE, AND METHODS THEREFOR
    Publication number: 20220256637
    Abstract: A master node (MN) (1) controls the MN (1) to enable, for a radio terminal (3), dual connectivity using a Master Cell Group (MCG) provided by the MN (1) and a Secondary Cell Group (SCG) provided by a secondary node (SN) (2). The MN (1) sends to the SN (2) a first message related to a modification or release of a configuration or resource in the SN (2) regarding the dual connectivity. The first message explicitly or implicitly indicates that the modification or release is related to a failure of the MCG or recovery from the failure of the MCG. This, for example, allows the SN to distinguish a message regarding modification or release of an SN configuration (or resource) sent from an MN to the SN for recovery from an MCG failure from other messages.
    Type: Application
    Filed: June 17, 2020
    Publication date: August 11, 2022
    Applicant: NEC Corporation
    Inventors: Hisashi FUTAKI, Sadafuku HAYASHI
  • Radio terminal, radio station, and method thereof
    Patent number: 11412388
    Abstract: A radio terminal (3) operates to perform a predetermined process regarding a first cell (Cell #2) on an unlicensed frequency (F2) based on a predetermined relationship between a frame timing of a first serving cell (Cell #1) using a licensed frequency (F1) and a frame timing of the first cell (Cell #2) using the unlicensed frequency (F2). This contributes, for example, to enabling a radio terminal to differentiate among two or more cells when these cells use the same cell identifier.
    Type: Grant
    Filed: September 30, 2020
    Date of Patent: August 9, 2022
    Assignee: NEC CORPORATION
    Inventor: Hisashi Futaki
  • Radio station system, radio terminal, and methods therein
    Patent number: 11394502
    Abstract: A radio station (2) transmits configuration information (501) to a radio terminal (1). The configuration information (501) indicates, on a cell-by-cell basis, at least one specific cell on which the radio terminal (1) is allowed to perform at least one of data transmission and data reception on a radio bearer used for uplink transmission or downlink transmission or both via a common Packet Data Convergence Protocol (PDCP) layer (402). As a result, in a radio architecture that provides tight interworking of two different Radio Access Technologies (RATs), it is for example possible to allow an eNB to indicate, to a radio terminal (UE), a specific cell on which the UE should perform uplink transmission.
    Type: Grant
    Filed: August 12, 2020
    Date of Patent: July 19, 2022
    Assignee: NEC CORPORATION
    Inventors: Hisashi Futaki, Sadafuku Hayashi
  • RADIO ACCESS NETWORK NODE, RADIO TERMINAL, AND METHODS THEREFOR
    Publication number: 20220225456
    Abstract: A master RAN node (1) associated with a master RAT (1) communicates with a secondary RAN node (2) associated with a secondary RAT and provides a radio terminal (3) with dual connectivity that uses the master RAT and the secondary RAT. In response to receiving, from the radio terminal (3) or a core network (4), terminal capability information indicating that the radio terminal (3) supports the split bearer, the master RAN node (1) uses a PDCP entity, which provides unified PDCP functionalities, for a master cell group split bearer for the radio terminal (3).
    Type: Application
    Filed: March 31, 2022
    Publication date: July 14, 2022
    Applicant: NEC Corporation
    Inventor: Hisashi FUTAKI
  • RADIO ACCESS NETWORK NODE, RADIO TERMINAL, AND METHOD THEREFOR
    Publication number: 20220225199
    Abstract: A target RAN node (3) receives, from a core network (5), a message requesting a handover of a radio terminal (1) from a bearer-based network to a bearer-less network. This handover request message includes flow information related to at least one session to be established in the bearer-less network in order to transfer at least one packet flow of the radio terminal (1). The target RAN node (3) transmits, to the core network (5), a handover acknowledge response message containing a transparent container that includes a radio resource configuration information derived from the flow information and is to be forwarded to a source RAN node associated (2) through the core network (5). It is thus, for example, possible to appropriately configuring an AS layer of a target RAT in an inter-RAT handover.
    Type: Application
    Filed: April 4, 2022
    Publication date: July 14, 2022
    Applicant: NEC Corporation
    Inventors: Hisashi FUTAKI, Sadafuku Hayashi
  • Radio terminal, radio station, and method therefor
    Patent number: 11388560
    Abstract: A radio terminal (1) is configured to transmit data using a first communication architecture type, in response to an occurrence of a request for specific data transmission when the radio terminal (1) has already been configured by a network (3) to use a second communication architecture type. This contributes to, for example, when the radio terminal has already been configured by the network to use the second communication architecture type that involves suspension and resumption of an RRC connection, facilitating effectively performing communication according to the first communication architecture type that involves data transmission over a control plane.
    Type: Grant
    Filed: November 25, 2020
    Date of Patent: July 12, 2022
    Assignee: NEC CORPORATION
    Inventors: Hisashi Futaki, Sadafuku Hayashi
  • Radio communication system, radio station, radio terminal, communication control method, and computer-readable medium
    Patent number: 11382002
    Abstract: A radio network (6) and a radio terminal (4) are configured to, when the radio terminal (4) is using a first cell (10) served by a first radio station (1) as a primary cell and a second cell (20) served by a second radio station (2) as a secondary cell, change the secondary cell form the second cell (20) to a third cell (30) while keeping communication status information regarding the radio terminal (4) on the second cell (20). It is thus, for example, possible to enable a communication service in the secondary cell to be continued after the secondary cell is changed when the radio terminal which is simultaneously using a plurality of cells served by different radio stations changes the secondary cell from a cell of one radio station to a cell of another radio station.
    Type: Grant
    Filed: December 30, 2019
    Date of Patent: July 5, 2022
    Assignee: NEC CORPORATION
    Inventors: Hisashi Futaki, Hiroaki Aminaka
  • Base station, radio terminal, and methods therein
    Patent number: 11381983
    Abstract: A radio terminal (1) receives from a base station (2) a first value (601) of a first radio resource configuration information element. The first value (601) is associated with normal coverage or with a first coverage enhancement level. The radio terminal (1) derives a second value (604) of the first radio resource configuration information element by converting (603) the first value (601) using a value of a conversion factor (602). The second value (604) is associated with a second coverage enhancement level. It is thus, for example, possible to contribute to reduction of data size necessary for the base station to notify the radio terminal of a plurality of radio resource configurations for a plurality of coverage enhancement levels.
    Type: Grant
    Filed: April 17, 2020
    Date of Patent: July 5, 2022
    Assignee: NEC CORPORATION
    Inventor: Hisashi Futaki
  • Radio communication system, radio terminal, radio network, radio communication method and program
    Patent number: 11381986
    Abstract: A wireless communication system comprises: a setting notifying means for notifying, to a radio terminal, setting information related to at least one of the radio terminal's collection of measurement information and the radio terminal's reporting of the measurement information to a radio network; a status notifying means for notifying, to the radio network, a status related to at least one of the radio terminal's collection of the measurement information and the radio terminal's reporting of the measurement information; and a re-establishing means for receiving the status and determining whether to re-establish the setting information.
    Type: Grant
    Filed: December 30, 2020
    Date of Patent: July 5, 2022
    Assignee: NEC CORPORATION
    Inventors: Hisashi Futaki, Kosei Kobayashi, Hiroaki Aminaka
  • DUAL CONNECTIVITY COMMUNICATION TERMINAL, BASE STATION, AND COMMUNICATION METHOD
    Publication number: 20220201685
    Abstract: A communication terminal capable of determining whether or not it can perform DC, a base station, and a communication method are provided. A communication terminal (30) according to the present disclosure includes a communication unit (31) that simultaneously communicates with a master base station (10) associated with a first radio access technology and a secondary base station (20) associated with a second radio access technology, and a control unit (32) that specifies, when it is notified by the master base station (10) that it can provide dual connectivity using the second radio access technology, at least one frequency band supported by the secondary base station (20), the secondary base station being configured to provide the dual connectivity in cooperation with the master base station (10).
    Type: Application
    Filed: March 11, 2022
    Publication date: June 23, 2022
    Applicant: NEC Corporation
    Inventors: Toshiyuki TAMURA, Naoaki Suzuki, Hisashi Futaki
  • RADIO ACCESS NETWORK NODE, AND METHOD AND NON-TRANSITORY COMPUTER READABLE MEDIUM THEREFOR
    Publication number: 20220182885
    Abstract: A radio access network (RAN) node (11) is configured to send, to another RAN node (12), first control information regarding at least one of one or more bandwidth parts (BWPs) configured in a system bandwidth. It is thus, for example, possible to contribute to inter-radio access network (RAN) node (e.g., inter-gNB) signaling enhanced to handle bandwidth parts.
    Type: Application
    Filed: February 11, 2022
    Publication date: June 9, 2022
    Applicant: NEC Corporation
    Inventors: Hisashi FUTAKI, Sadafuku HAYASHI
  • USER EQUIPMENT, METHOD OF USER EQUIPMENT, NETWORK NODE, AND METHOD OF NETWORK NODE
    Publication number: 20220182980
    Abstract: The present disclosure discloses a method for a User Equipment (UE). The method comprises: establishing a communication session with a network node for transmission of data; receiving a configuration message indicating information for one or more of transmission slots for a plurality of logical channels; setting up for transmission of data based on the received configuration message to select one or more logical channels of the plurality of logical channels; and prioritizing the selection of plurality of logical channels when the UE is indicative of initiation of transmission of data.
    Type: Application
    Filed: December 19, 2019
    Publication date: June 9, 2022
    Applicant: NEC Corporation
    Inventors: Venkatarao GONUGUNTLA, Hisashi FUTAKI, Tetsu IKEDA, Sadafuku HAYASHI
  • Radio access network node, radio terminal, core network node, and method therefor
    Patent number: 11356854
    Abstract: During handover of a radio terminal (1) from a first network to a second network, a target RAN node (3) is operates to: receive, from a core network (5), slice information about a network slice which is included in the second network and to which the radio terminal (1) is to be connected; create, upon receiving the slice information, radio resource configuration information that is to be used by the radio terminal (1) after the handover in the second network; and transmit this radio resource configuration information through the first network to the radio terminal (1). It is possible to contribute to appropriately configuring an AS layer or NAS layer of a target RAT in inter-RAT handover.
    Type: Grant
    Filed: May 15, 2017
    Date of Patent: June 7, 2022
    Assignee: NEC CORPORATION
    Inventors: Hisashi Futaki, Sadafuku Hayashi
  • Radio communication system, base station, mobile station, communication control method, and computer readable medium
    Patent number: 11356924
    Abstract: A first base station (1) is configured to send, to a second base station (2), first configuration information that is necessary to establish a data bearer and a data radio bearer in the second base station (2) for a C/U-plane split scenario (S105). Further, the first base station (1) is configured to keep the first configuration information in the first base station (1) even after the data bearer and the data radio bearer are established in the second base station (2) (S109). It is thus, for example, possible to contribute to a reduction in a path switch delay when a UE moves between cells in the C/U-plane split scenario.
    Type: Grant
    Filed: July 16, 2019
    Date of Patent: June 7, 2022
    Assignee: NEC CORPORATION
    Inventors: Hiroaki Aminaka, Hisashi Futaki
  • Radio access network node, radio terminal, core network node, and method therefor
    Patent number: 11343679
    Abstract: During handover of a radio terminal (1) from a first network to a second network, a target RAN node (3) is operates to: receive, from a core network (5), slice information about a network slice which is included in the second network and to which the radio terminal (1) is to be connected; create, upon receiving the slice information, radio resource configuration information that is to be used by the radio terminal (1) after the handover in the second network; and transmit this radio resource configuration information through the first network to the radio terminal (1). It is possible to contribute to appropriately configuring an AS layer or NAS layer of a target RAT in inter-RAT handover.
    Type: Grant
    Filed: October 20, 2021
    Date of Patent: May 24, 2022
    Assignee: NEC CORPORATION
    Inventors: Hisashi Futaki, Sadafuku Hayashi
  • Radio communication system, radio station, radio terminal, communication control method, and non-transitory computer readable medium
    Patent number: 11343803
    Abstract: A radio terminal can perform carrier aggregation using a first cell of a first radio station and a second cell of a second radio station. The first radio station performs, with the radio terminal, radio resource control for the first cell and the second cell in order to perform the carrier aggregation. Further, the first radio station transmits, to the second radio station, update information regarding an update to a configuration related to the radio resource control for the second cell. It is thus, for example, possible to prevent or reduce data transmission/reception failures which would otherwise occur while a configuration of radio parameters or the like is being changed by a radio terminal in carrier aggregation of a plurality of cells served by different radio stations.
    Type: Grant
    Filed: December 10, 2019
    Date of Patent: May 24, 2022
    Assignee: NEC CORPORATION
    Inventors: Hisashi Futaki, Hiroaki Aminaka
  • Radio communication system, radio terminal, radio network, radio communication method and program
    Patent number: 11343691
    Abstract: A radio terminal, which has a function to collect and report measurement information designated by a radio network, comprises: means for receiving collection/reporting control information related to the radio terminal's execution of at least one of the collection of measurement information and the reporting of the measurement information to the radio network; and control means for executing, based on the collection/reporting control information, at least one of the collection and the reporting if execution determination information, which is related to at least one of the collection of the measurement information and the reporting of the measurement information to be executed by the local terminal, satisfies a given determination criterion.
    Type: Grant
    Filed: August 5, 2020
    Date of Patent: May 24, 2022
    Assignee: NEC CORPORATION
    Inventors: Hisashi Futaki, Hiroaki Aminaka
  • First base station, second base station, terminal apparatus, method, program, and recording medium
    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