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).

  • Patent number: 11452086
    Abstract: A radio station (1) transmits, to a radio terminal (3) on a licensed frequency (Cell #1), control signaling (S102) associated with at least one of a measurement timing and a measurement period of terminal measurement on an unlicensed frequency (Cell #2) and receives, from the radio terminal (3) on the licensed frequency (Cell #1), a result of the terminal measurement that is executed in response to the control signaling (S102) and in accordance with at least one of the measurement timing and the measurement period (S105). This contributes, for example, to acquisition of information useful for the radio station to determine whether to allow the radio terminal to perform communication on the unlicensed frequency.
    Type: Grant
    Filed: September 11, 2020
    Date of Patent: September 20, 2022
    Assignee: NEC CORPORATION
    Inventor: Hisashi Futaki
  • Patent number: 11452160
    Abstract: A radio terminal (1) determines (201) (a) a pathloss level between the radio terminal (1) and a base station (2), (b) a coverage enhancement level based on the pathloss level, or (c) a coverage enhancement mode configured in the radio terminal (1). The radio terminal chooses (202) between non-truncated first information and truncated first information, having a smaller bit length than the non-truncated first information, to be included in an initial uplink Radio Resource Control (RRC) message transmitted within a random access procedure, based on the determined pathloss level, the determined coverage enhancement level, or the determined coverage enhancement mode. This contributes to, for example, enabling a base station to easily know the Msg3 size desired by a radio terminal.
    Type: Grant
    Filed: April 14, 2020
    Date of Patent: September 20, 2022
    Assignee: NEC CORPORATION
    Inventor: Hisashi Futaki
  • Publication number: 20220295314
    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: Application
    Filed: June 1, 2022
    Publication date: September 15, 2022
    Applicant: NEC Corporation
    Inventor: Hisashi FUTAKI
  • Publication number: 20220286951
    Abstract: A RAN node apparatus (1) sends to, an AMF (3) in a core network, slice support information indicating a network slice supported by another RAN node (2) that can be used as a secondary node in dual connectivity in which the RAN node apparatus (1) acts as a master node. This can contribute, for example, to allowing the AMF to determine a network slice allowed to a UE, while taking into account a network slice supported by a secondary node of dual connectivity.
    Type: Application
    Filed: January 15, 2021
    Publication date: September 8, 2022
    Applicant: NEC Corporation
    Inventors: Hisashi FUTAKI, Toshiyuki TAMURA
  • Publication number: 20220286884
    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: Application
    Filed: May 27, 2022
    Publication date: September 8, 2022
    Applicant: NEC Corporation
    Inventors: Hisashi FUTAKI, Kosei Kobayashi, Hiroaki Aminaka
  • Publication number: 20220287137
    Abstract: If uplink data together with an RRC resume request message is received from a radio terminal in an RRC_INACTIVE state and a radio terminal context is not available in a first RAN node (1), the first RAN node (1) sends a second type of control message to a second RAN node (2). The second type of control message requests the radio terminal context, and is distinct from a first type of control message that is sent to the second RAN node (2) by the first RAN node (1) when an RRC resume request message not accompanied by uplink data is received. This can contribute, for example, to enabling uplink (UL) data of a radio terminal in RRC_INACTIVE to be transmitted to a core network without relocating a radio terminal context from an old RAN node to a new RAN node.
    Type: Application
    Filed: November 30, 2020
    Publication date: September 8, 2022
    Applicant: NEC Corporation
    Inventors: Hisashi FUTAKI, Sadafuku HAYASHI
  • Publication number: 20220287023
    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: Application
    Filed: May 23, 2022
    Publication date: September 8, 2022
    Applicant: NEC Corporation
    Inventors: Hisashi Futaki, Hiroaki Aminaka
  • Publication number: 20220287102
    Abstract: A RAN node (1) broadcasts a first initial bandwidth part (BWP) configuration via system information, and broadcasts a second initial BWP configuration via the system information or transmits it via radio terminal dedicated signaling. The first initial BWP configuration includes cell-specific common parameters of a first initial BWP of a cell, while the second initial BWP configuration includes cell-specific common parameters of a second initial BWP of the cell. The second initial BWP is not used by a first type of radio terminal, but is used by a second type of radio terminal. The bandwidth of the second initial BWP is equal to or narrower than of the first initial BWP. This allows the second type of radio terminal, which has a limited capability compared to the first type of radio terminal, to use an initial BWP suitable for its capability.
    Type: Application
    Filed: November 30, 2020
    Publication date: September 8, 2022
    Applicant: NEC Corporation
    Inventors: Hisashi FUTAKI, Sadafuku HAYASHI
  • Publication number: 20220286936
    Abstract: In order to further facilitate continuous communication with a flying mobile terminal, a first radio station according to an example aspect of the present disclosure includes a control section configured to, in a handover of a mobile terminal configured to move according to flight path information, control the handover according to the flight path information from a second radio station to the first radio station; and a communication processing section configured to transmit a message including information related to acceptance of the handover to the second radio station without receiving a request message for the handover transmitted from the second radio station.
    Type: Application
    Filed: August 20, 2020
    Publication date: September 8, 2022
    Applicant: NEC Corporation
    Inventors: Hisashi FUTAKI, Toshiyuki TAMURA
  • Publication number: 20220279594
    Abstract: A system is disclosed in which a user equipment (UE) performs small data transmissions in Radio Resource Control (RRC) Inactive state. The UE receives information configuring small data transmissions via a control-plane, and when there is uplink data to be sent as a small data transmission, the UE generates and transmits an RRC message comprising said small data transmission using a Signalling Radio Bearer (SRB) provided via a Common Control Channel (CCCH).
    Type: Application
    Filed: March 4, 2021
    Publication date: September 1, 2022
    Applicant: NEC Corporation
    Inventors: Yuhua CHEN, Hisashi FUTAKI
  • Publication number: 20220279414
    Abstract: In order to further facilitate continuous communication with a flying mobile terminal, a control apparatus according to an example aspect of the present disclosure includes a communication processing section configured to transmit a first request message requesting allocation of a radio resource for a mobile terminal configured to move according to flight path information to a core network connected to a radio station configured to allocate the radio resource.
    Type: Application
    Filed: August 20, 2020
    Publication date: September 1, 2022
    Applicant: NEC Corporation
    Inventors: Toshiyuki TAMURA, Hisashi FUTAKI
  • Publication number: 20220279436
    Abstract: A RAN node apparatus (1) transmits, to a User Equipment (UE) (3), in a cell served by the RAN node apparatus (10), information indicating a network slice supported by another RAN node (2) that can be used as a secondary node in dual connectivity in which the RAN node apparatus acts as a master node. This can contribute, for example, to allowing the UE to know a network slice supported by a potential secondary node of dual connectivity through a potential master node of the dual connectivity.
    Type: Application
    Filed: January 15, 2021
    Publication date: September 1, 2022
    Applicant: NEC Corporation
    Inventors: Hisashi FUTAKI, Toshiyuki TAMURA
  • Patent number: 11425780
    Abstract: A radio terminal (2) controls state transitions of the radio terminal (2) among first to third RRC states. In addition, if the radio terminal (2) is in the second RRC state, if a current cell that the radio terminal (2) has camped on is different from a first cell in which a state transition from the first RRC state to the second RRC state was performed, and if the current cell satisfies a predetermined condition, the radio terminal (2) allows the radio terminal (2) to transmit data to be transmitted in the current cell by a first transmission procedure in which the radio terminal (2) transmits uplink data before entering the first RRC state.
    Type: Grant
    Filed: October 1, 2020
    Date of Patent: August 23, 2022
    Assignee: NEC CORPORATION
    Inventors: Hisashi Futaki, Sadafuku Hayashi
  • Publication number: 20220264448
    Abstract: The present disclosure provides an apparatus, and a method for optimizing user equipment (UE) power consumption on activated Secondary Cells during dormancy and non-dormancy behavior based on the first configuration and second configuration information as provided by radio station.
    Type: Application
    Filed: March 22, 2021
    Publication date: August 18, 2022
    Applicant: NEC Corporation
    Inventors: Venkatarao GONUGUNTLA, Hisashi FUTAKI, Tetsu IKEDA, Sadafuku HAYASHI
  • Publication number: 20220263557
    Abstract: This present disclosure provides a mechanism to classify CSI report(s) into valid/partially valid/invalid CSI report(s) by defining a new CSI evaluation methodology. The present disclosure also introduces a new UE behaviour of sending different (valid/partially valid/invalid) type of CSI report to inform the gNB about the TCI state known status at the UE. The present disclosure also introduces an implicit or explicit signalling method to inform the type of CSI report to the gNB. The present disclosure also discloses new UE behaviour of skipping CSI reports between partially valid/invalid CSI report and valid CSI report during TCI state switching/SCell activation.
    Type: Application
    Filed: June 18, 2020
    Publication date: August 18, 2022
    Applicant: NEC Corporation
    Inventors: Venkatarao GONUGUNTLA, Hisashi FUTAKI, Tetsu IKEDA, Sadafuku HAYASHI
  • 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
  • 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
  • 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
  • Publication number: 20220256368
    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 an indication regarding an MCG failure to the SN (2). The MN (1) transmits an RRC message related to recovery of the MCG failure to the radio terminal (3), via an SCG part of a split signalling radio bearer between the MN (1) and the radio terminal (3). This, for example, allows the SN to learn of an occurrence of the MCG failure.
    Type: Application
    Filed: June 10, 2020
    Publication date: August 11, 2022
    Applicant: NEC Corporation
    Inventors: Hisashi FUTAKI, Sadafuku HAYASHI
  • 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