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).

  • DISTRIBUTED UNIT, CENTRAL UNIT, RADIO ACCESS NETWORK NODE, AND METHOD THEREFOR
    Publication number: 20220030498
    Abstract: A Distributed Unit (DU) (2) of a base station sends a first message to a Central Unit (1) of the base station in response to detecting initiation of a conditional mobility of a radio terminal (3) from a first cell served by the DU (2) to a second cell. It is thus for example possible to allow a Central Unit (CU) to be aware of satisfaction of an execution condition of a conditional mobility (or initiation of the conditional mobility).
    Type: Application
    Filed: October 5, 2021
    Publication date: January 27, 2022
    Applicant: NEC Corporation
    Inventors: Hisashi FUTAKI, Sadafuku HAYASHI
  • RADIO COMMUNICATION SYSTEM, RADIO STATION, RADIO TERMINAL, NETWORK OPERATION MANAGEMENT APPARATUS, AND COMMUNICATION QUALITY CONFIRMATION METHOD
    Publication number: 20220022080
    Abstract: The present invention is a radio communication system having quality measurement means configured to execute quality measurement related to a service quality in communication between a radio terminal and a radio station, and information collection means configured to collect information related to a location of the radio terminal to be a target for the quality measurement, the radio communication system comprising: means configured to associate the information related to the location of the radio terminal when a predetermined condition is satisfied in an execution period of the quality measurement with results of the quality measurement.
    Type: Application
    Filed: September 10, 2021
    Publication date: January 20, 2022
    Applicant: NEC Corporation
    Inventor: HISASHI FUTAKI
  • Method and apparatus for provisioning V2X services
    Patent number: 11228881
    Abstract: A base station apparatus (130, 220) in a network (410) transmits V2X support information indicating that a V2X service is supported by the network (410). In response to receiving V2X support information, a radio terminal (100, 120) transmits, to the network (410), V2X terminal information indicating that the radio terminal (100, 120) is interested in the V2X service. The network (410) transmits V2X configuration to the radio terminal (100, 120) in response to receiving the V2X terminal information transmitted from the radio terminal (100, 120). The radio terminal (100, 120) receives the V2X configuration and performs V2X communication in accordance with the V2X configuration. It is thus, for example, possible to contribute to achievement of a procedure for performing provisioning for the V2X service on the radio terminal that intends to use the V2X service.
    Type: Grant
    Filed: January 16, 2020
    Date of Patent: January 18, 2022
    Assignee: NEC CORPORATION
    Inventor: Hisashi Futaki
  • Method and apparatus for radio link monitoring measurements in a system using bandwidth parts
    Patent number: 11218280
    Abstract: When a downlink bandwidth part (BWP) is switched from a first BWP to a second BWP without a change of a cell defining synchronization signal block (SSB), if a reference signal type for Radio Link Monitoring (RLM) is set to an SSB type, a radio terminal (12) continues to use for RLM measurements a first SSB associated with the first BWP after switching of the downlink BWP to the second BWP. This for example enables the radio terminal to monitor a suitable Reference Signal (RS) for RLM measurements after switching of the DL active BWP.
    Type: Grant
    Filed: August 14, 2018
    Date of Patent: January 4, 2022
    Assignee: NEC CORPORATION
    Inventor: Hisashi Futaki
  • DISTRIBUTED UNIT, CENTRAL UNIT, AND METHOD THEREFOR
    Publication number: 20210410021
    Abstract: A central unit (1) of a base station sends, to a distributed unit (2) of the base station, a message requesting addition of a secondary cell for carrier aggregation. The message contains a first information element indicating that the secondary cell needs to be initially activated or dormant. It is thus, for example, possible to contribute to improvement for enabling direct configuration of a secondary cell state in an architecture where a base station divides into a central unit and a distributed unit.
    Type: Application
    Filed: August 23, 2019
    Publication date: December 30, 2021
    Applicant: NEC Corporation
    Inventors: Hisashi FUTAKI, Sadafuku HAYASHI
  • RADIO TERMINAL, RADIO ACCESS NETWORK NODE, AND METHOD THEREFOR
    Publication number: 20210392651
    Abstract: When a secondary cell of carrier aggregation has been activated, a radio terminal (2) communicates with a radio access network (RAN) node (1) in an active downlink (DL) bandwidth part (BWP) selected from among a plurality of DL BWPs for the secondary cell. In addition, when the secondary cell is in a dormant state, the radio terminal (2) transmits to the RAN node (1), via a primary cell or another activated serving cell of the carrier aggregation, a channel state information report for a target DL BWP selected from among the plurality of DL BWPs. It is thus, for example, possible to allow the radio terminal to perform channel a state information measurement on a dormant SCell that has been configured with a plurality of BWPs.
    Type: Application
    Filed: August 20, 2019
    Publication date: December 16, 2021
    Applicant: NEC Corporation
    Inventors: Hisashi FUTAKI, Sadafuku HAYASHI
  • NETWORK NODE, COMMUNICATION METHOD, PROGRAM, AND RECORDING MEDIUM
    Publication number: 20210385711
    Abstract: In order to prevent deterioration of QoE of a user in intersystem handover, an apparatus according to the present invention includes: an information obtaining unit configured to obtain network slice related information related to a network slice used by a terminal apparatus in a first radio communication system; and a first communication processing unit configured to transmit, to a second network node of a second radio communication system, a message for intersystem handover of the terminal apparatus from the first radio communication system to the second radio communication system, the message including the network slice related information.
    Type: Application
    Filed: August 30, 2019
    Publication date: December 9, 2021
    Applicant: NEC Corporation
    Inventors: Tomu TAMURA, Hisashi FUTAKI
  • RADIO TERMINAL, RADIO ACCESS NETWORK NODE, AND METHOD THEREFOR
    Publication number: 20210385867
    Abstract: A radio terminal (2) attempts to receive a second message of a 2-step random access procedure after transmitting a first message of the 2-step random access procedure. In response to successfully receiving the second message of the 2-step random access procedure and determining that the second message explicitly or implicitly indicates a fallback to a 4-step random access procedure, the radio terminal (2) further attempts to receive a control message that contains an uplink grant indicating uplink resources available for transmission of a third message of a 4-step random access procedure. This contributes to, for example, reducing the load on a radio terminal that supports a fallback from the 2-step random access procedure to the 4-step random access procedure.
    Type: Application
    Filed: August 20, 2019
    Publication date: December 9, 2021
    Applicant: NEC Corporation
    Inventor: Hisashi FUTAKI
  • Radio access network node, radio terminal, core network node, and method therefor
    Patent number: 11197162
    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: December 7, 2021
    Assignee: NEC CORPORATION
    Inventors: Hisashi Futaki, Sadafuku Hayashi
  • Communication system
    Patent number: 11178635
    Abstract: A communication system is disclosed in which an MME receives an indication that a base station of a tracking area supports extended discontinuous reception, eDRX. The MME determines that paging is required for a communication device and that the communication device may be located in a cell of a base station of the tracking area. The MME triggers paging of the communication device in accordance with discontinuous reception, DRX, information that is not specific to eDRX via base stations that support eDRX and triggered paging of the communication device in accordance with eDRX specific information via base stations which support eDRX has been received.
    Type: Grant
    Filed: September 13, 2017
    Date of Patent: November 16, 2021
    Assignee: NEC CORPORATION
    Inventors: Yuhua Chen, Sadafuku Hayashi, Hisashi Futaki
  • DISTRIBUTED UNIT, RADIO TERMINAL, AND METHODS THEREFOR
    Publication number: 20210352621
    Abstract: In response to receiving a signaling message requesting a broadcast of specific system information from a central unit (1) of a base station, a distributed unit (2) of the base station changes an active downlink (DL) Bandwidth Part (BWP) of a plurality of radio terminals from a first DL BWP that is not configured with a search space (SS) for receiving the specific system information to a second DL BWP that is configured with an SS for receiving the specific system information. In addition, the distributed unit (2) broadcasts the specific system information on the second DL BWP.
    Type: Application
    Filed: May 31, 2019
    Publication date: November 11, 2021
    Applicant: NEC Corporation
    Inventors: Sadafuku HAYASHI, Hisashi FUTAKI
  • RADIO ACCESS NETWORK NODE, RADIO TERMINAL, AND METHODS AND NON-TRANSITORY COMPUTER-READABLE MEDIA THEREFOR
    Publication number: 20210352639
    Abstract: A second RAN node (2) associated with a second RAT sends a radio resource configuration of the second RAT to a radio terminal (3) via a first RAN node (1) associated with a first RAT. The radio resource configuration explicitly or implicitly indicates at least one numerology that is included in multiple numerologies supported by the second RAT and is different from a reference numerology. It is thus, for example, possible to allow a radio terminal to be configured with a numerology of a cell served by a secondary gNB or a target gNB in Inter-RAT Dual Connectivity between E-UTRA and NR and in a handover from E-UTRA to NR.
    Type: Application
    Filed: July 23, 2021
    Publication date: November 11, 2021
    Applicant: NEC Corporation
    Inventors: Hisashi FUTAKI, Sadafuku HAYASHI
  • RADIO ACCESS NETWORK NODE, RADIO TERMINAL, CORE NETWORK NODE, AND METHOD THEREFOR
    Publication number: 20210352549
    Abstract: In response to receiving from a source RAN node (2), on a direct interface (101), a message requesting a handover of a radio terminal (1) from a first network to a second network, a target RAN node (3) receives at least one of slice information and flow information from a core network (5), and controls communication of the radio terminal (1) based on at least one of the slice information and the flow information. The slice information relates to a network slice in the second network. The flow information relates to at least one session to be established in the second network, serving as a bearer-less network, in order to transfer at least one packet flow of the radio terminal (1). It is thus possible, for example, to provide an Inter-RAT handover procedure involving transfer of handover signaling messages on a direct inter-base-station interface.
    Type: Application
    Filed: July 26, 2021
    Publication date: November 11, 2021
    Applicant: NEC CORPORATION
    Inventors: Hisashi Futaki, Sadafuku Hayashi
  • RADIO COMMUNICATION SYSTEM, RADIO STATION, RADIO TERMINAL, COMMUNICATION CONTROL METHOD, AND NON-TRANSITORY COMPUTER READABLE MEDIUM
    Publication number: 20210352752
    Abstract: A radio terminal (3) can perform carrier aggregation using a first cell (10) of a first radio station (1) and a second cell (20) of a second radio station (2). The first radio station (1) performs, with the radio terminal (3), radio resource control for the first cell (10) and the second cell (20) in order to perform the carrier aggregation. At least one of the second radio station (2) and the radio terminal (3) is configured to transmit, to the first radio station (10), information about a problem occurring in a radio link in the second cell (20) between the second radio station (20) and the radio terminal (30) while the carrier aggregation of the first cell (10) and the second cell (20) is being performed.
    Type: Application
    Filed: July 21, 2021
    Publication date: November 11, 2021
    Applicant: NEC Corporation
    Inventors: Hisashi FUTAKI, Hiroaki AMINAKA
  • Radio access network node, and method and non-transitory computer readable medium therefor
    Patent number: 11172404
    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: Grant
    Filed: June 12, 2020
    Date of Patent: November 9, 2021
    Assignee: NEC CORPORATION
    Inventors: Hisashi Futaki, Sadafuku Hayashi
  • RADIO ACCESS NETWORK NODE, RADIO TERMINAL, CORE NETWORK NODE, AND METHOD THEREFOR
    Publication number: 20210345119
    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: Application
    Filed: July 15, 2021
    Publication date: November 4, 2021
    Applicant: NEC CORPORATION
    Inventors: Hisashi FUTAKI, Sadafuku Hayashi
  • RADIO TERMINAL, BASE STATION, AND METHODS AND NON-TRANSITORY COMPUTER-READABLE MEDIA THEREFOR
    Publication number: 20210345194
    Abstract: When a radio terminal (2) in a first RAT RRC_INACTIVE state in the first radio access network (RAN) (3) and having a Non-Access Stratum (NAS) connection with a first core network (CN) (4) associated with the first RAT moves to a cell (51) of a second RAN (6), the radio terminal (2) alters an RRC state transition operation of the radio terminal (2) depending on whether the second RAN (6) supports interworking with at least one of the first CN (4) and the first RAN (3).
    Type: Application
    Filed: July 13, 2021
    Publication date: November 4, 2021
    Applicant: NEC CORPORATION
    Inventors: Hisashi FUTAKI, Sadafuku Hayashi
  • Machine-to-machine (M2M) terminal, base station, method, and computer readable medium
    Patent number: 11166214
    Abstract: A Machine-to-machine (M2M) terminal (11) comprises a radio communication unit (111) and a controller (112). The radio communication unit (111) is configured to communicate with a base station (13). The controller (112) is configured to change at least one of a cell selection operation, a cell reselection operation, and a handover operation according to whether a specific coverage enhancement processing is required or according to whether the specific coverage enhancement processing is supported by at least one of a cell (13) in which the M2M terminal (11) camps on and a neighbouring cell (14) of the cell (13) which the M2M terminal (11) camps on. It is thus possible to provide an improved technique for allowing the M2M terminal that is supporting a special coverage enhancement processing for M2M terminals to camp on an appropriate cell.
    Type: Grant
    Filed: July 21, 2020
    Date of Patent: November 2, 2021
    Assignee: NEC CORPORATION
    Inventor: Hisashi Futaki
  • BASE STATION, MACHINE-TO-MACHINE (M2M) TERMINAL, METHOD, AND COMPUTER READABLE MEDIUM
    Publication number: 20210337396
    Abstract: A base station (13) is configured to receive, from a Machine-to-machine (M2M) terminal (11) or a core network (14), history information indicating whether or not specific coverage enhancement processing was executed in previous communication with the M2M terminal (11). Further, the base station (13) is configured to control communication using the specific coverage enhancement processing between the M2M terminal (11) and the base station (13) based on the history information received from the M2M terminal (11) or the core network (14). It is thus possible to contribute to improving efficiency of determination regarding whether to apply a special coverage enhancement processing to the M2M terminal.
    Type: Application
    Filed: July 2, 2021
    Publication date: October 28, 2021
    Inventor: HISASHI FUTAKI
  • RADIO COMMUNICATION SYSTEM, BASE STATION APPARATUS, RADIO TERMINAL AND COMMUNICATION CONTROL METHOD
    Publication number: 20210329630
    Abstract: A radio communication system includes a first base station that manages a first cell (110), a second base station (12) that manages a second cell (120), and a radio terminal (2). The radio terminal (2) supports dual connectivity involving a bearer split in which a first network bearer between the radio terminal (2) and a core network (3) is split over the first base station (11) and the second base station (12). The first base station (11) receives, from the second base station (12), bearer split status information about communication of the first network bearer in the second base station (12), and performs control of an access stratum related to the first network bearer. It is thus possible to contribute, for example, to an improvement in control of an access stratum when dual connectivity involving a bearer split is performed.
    Type: Application
    Filed: June 24, 2021
    Publication date: October 21, 2021
    Applicant: NEC Corporation
    Inventors: Hisashi FUTAKI, Hiroto SUGAHARA, Hiroaki AMINAKA