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).
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Publication number: 20240373298Abstract: [Object] To make it possible to further increase a possibility of a success in a handover. [Solution] A first apparatus of the present invention includes: a first communication processing unit configured to transmit reference signals using beamforming; and a second communication processing unit configured to receive a handover message from a source base station of a handover of a terminal apparatus. The handover message includes beam related information related to a beam. The first communication processing unit is configured to receive an access signal of the terminal apparatus based on the beam related information.Type: ApplicationFiled: July 16, 2024Publication date: November 7, 2024Applicant: NEC CorporationInventors: Kengo OKETANI, Hisashi FUTAKI
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Publication number: 20240365094Abstract: 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: ApplicationFiled: July 9, 2024Publication date: October 31, 2024Applicant: NEC CorporationInventor: Hisashi FUTAKI
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Patent number: 12133270Abstract: 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: GrantFiled: March 4, 2021Date of Patent: October 29, 2024Assignee: NEC CORPORATIONInventors: Yuhua Chen, Hisashi Futaki
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Publication number: 20240349134Abstract: During a mobility procedure for moving a radio terminal (3) from a source cell (11) to one of candidate target cells (21-23), a target RAN node (2) transmits to the radio terminal (3), via a source RAN node (1), a first configuration common to the candidate target cells and a plurality of second configurations each associated with a respective one of the candidate target cells. The first configuration includes at least one configuration parameter for enabling the radio terminal (3) to access to one of the candidate target cells or to communicate therein. Each second configuration includes at least one configuration parameter for enabling the radio terminal (3) to access to the corresponding candidate target cell or to communicate therein. This contributes to, for example, reducing signaling overhead of an inter-RAN node interface (and an air interface) during various mobility procedures including handovers.Type: ApplicationFiled: June 27, 2024Publication date: October 17, 2024Applicant: NEC CorporationInventors: Hisashi FUTAKI, Sadafuku HAYASHI
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Patent number: 12120767Abstract: 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: GrantFiled: June 30, 2022Date of Patent: October 15, 2024Assignee: NEC CORPORATIONInventors: Hisashi Futaki, Sadafuku Hayashi
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Patent number: 12114182Abstract: 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: GrantFiled: June 1, 2022Date of Patent: October 8, 2024Assignee: NEC CORPORATIONInventor: Hisashi Futaki
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Publication number: 20240334327Abstract: 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) or the second radio station (2) transmits constraint information to the radio terminal (3). The constraint information contains an information element necessary to specify a reception constraint and/or transmission constraint related to the first cell (10) and/or the second cell (20) when the carrier aggregation is performed. The reception/transmission constraint is a constraint related to downlink signal reception/uplink signal transmission by the radio terminal over one or more subframe periods of the primary cell (10) and the secondary cell (20). It is thus, for example, possible to contribute to reduction in wasteful power consumption in the radio terminal in the carrier aggregation of a plurality of cells served by different radio stations.Type: ApplicationFiled: June 10, 2024Publication date: October 3, 2024Applicant: NEC CorporationInventors: Hisashi FUTAKI, Hiroaki AMINAKA
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Patent number: 12108422Abstract: A radio terminal (2) receives beam configuration information from a base station (1), measures a plurality of transmission beams (10) transmitted from the base station (1) in accordance with the beam configuration information, and uses one or more beams selected from among the plurality of transmission beams (10) based on a measurement result as a serving beam. Each of the plurality of transmission beams carries a beamformed reference signal to be measured by the radio terminal (2). The beam configuration information includes a reference signal configuration indicating a radio resource used on each beam for transmitting the beamformed reference signal. It is thus, for example, possible to contribute to provision of a procedure for UE mobility between beams.Type: GrantFiled: September 20, 2022Date of Patent: October 1, 2024Assignee: NEC CORPORATIONInventor: Hisashi Futaki
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Patent number: 12089109Abstract: 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: GrantFiled: October 5, 2021Date of Patent: September 10, 2024Assignee: NEC CORPORATIONInventors: Hisashi Futaki, Sadafuku Hayashi
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Publication number: 20240298379Abstract: A radio terminal (1B) negotiates a DRX configuration with a peer terminal (1A) for reception by the radio terminal (1B) of a unicast communication on a direct interface between the radio terminal (1B) and the peer terminal (1A). The radio terminal (1B) indicates to the peer terminal (1A), while the DRX configuration has been negotiated and is valid, whether or not the radio terminal (1B) performs a DRX operation based on the valid DRX configuration in order to receive the unicast communication. This can help, for example, to prevent an increase in the signaling load on the radio terminal with respect to DRX for device-to-device (D2D) communication.Type: ApplicationFiled: June 29, 2022Publication date: September 5, 2024Applicant: NEC CorporationInventors: Satoaki Hayashi, Sadafuku Hayashi, Hisashi Futaki
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Patent number: 12082084Abstract: 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: GrantFiled: December 15, 2021Date of Patent: September 3, 2024Assignee: NEC CORPORATIONInventor: Hisashi Futaki
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Patent number: 12082195Abstract: 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: GrantFiled: May 23, 2022Date of Patent: September 3, 2024Assignee: NEC CORPORATIONInventors: Hisashi Futaki, Hiroaki Aminaka
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Publication number: 20240292282Abstract: A secondary node (2) transmits to a radio terminal (3), via a master node (1), a first RRC message indicating an execution condition of a conditional primary cell change of a primary cell of a secondary cell group from a first cell to a second cell. In addition, the secondary node (2) receives, via the master node (1), a second RRC message that is transmitted from the radio terminal (3) in response to a satisfaction of the execution condition. This contributes to, for example, allowing the secondary node to be aware of a satisfaction of an execution condition of a conditional PSCell change where RRC signaling between the secondary node and the radio terminal is performed via the master node.Type: ApplicationFiled: May 9, 2024Publication date: August 29, 2024Applicant: NEC CorporationInventors: Hisashi FUTAKI, Sadafuku HAYASHI
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Publication number: 20240292283Abstract: 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: ApplicationFiled: May 8, 2024Publication date: August 29, 2024Applicant: NEC CorporationInventors: Hisashi FUTAKI, Sadafuku Hayashi
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Publication number: 20240292467Abstract: A NAS layer (202) of a radio terminal (1) passes information about a first feature to an AS layer (208). The AS layer (208) determines a feature combination including the first feature derived from the information and one or more other features. The AS layer (208) selects a random access resource from a first set of random access resources associated with the determined feature combination. The AS layer (208) performs a random access preamble transmission on the selected random access resource. This may contribute, for example, to providing interaction between the Non-Access Stratum (NAS) layer and the Access Stratum (AS) layer for the determination of a feature combination.Type: ApplicationFiled: September 28, 2022Publication date: August 29, 2024Applicant: NEC CORPORATIONInventor: Hisashi FUTAKI
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Patent number: 12075428Abstract: 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: GrantFiled: July 23, 2021Date of Patent: August 27, 2024Assignee: NEC CORPORATIONInventors: Hisashi Futaki, Sadafuku Hayashi
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Patent number: 12069737Abstract: A radio communication system provided with a communication device and a radio communication network system is characterized by comprising a transmission delay estimate information transmitting means for transmitting transmission delay estimate information to the radio communication network system when the transmission condition of the transmission delay estimate information is met.Type: GrantFiled: April 25, 2023Date of Patent: August 20, 2024Assignee: NEC CORPORATIONInventors: Hisashi Futaki, Jinsock Lee, Kojiro Hamabe
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Patent number: 12069521Abstract: During a mobility procedure for moving a radio terminal (3) from a source cell (11) to one of candidate target cells (21-23), a target RAN node (2) transmits to the radio terminal (3), via a source RAN node (1), a first configuration common to the candidate target cells and a plurality of second configurations each associated with a respective one of the candidate target cells. The first configuration includes at least one configuration parameter for enabling the radio terminal (3) to access to one of the candidate target cells or to communicate therein. Each second configuration includes at least one configuration parameter for enabling the radio terminal (3) to access to the corresponding candidate target cell or to communicate therein. This contributes to, for example, reducing signaling overhead of an inter-RAN node interface (and an air interface) during various mobility procedures including handovers.Type: GrantFiled: October 31, 2019Date of Patent: August 20, 2024Assignee: NEC CORPORATIONInventors: Hisashi Futaki, Sadafuku Hayashi
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Publication number: 20240276556Abstract: 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: ApplicationFiled: April 3, 2024Publication date: August 15, 2024Applicant: NEC CorporationInventor: Hisashi FUTAKI
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Patent number: RE50069Abstract: A wireless communication system is provided for reducing the probability that latency before data transmission increases when a mobile station that is actually in sync is judged to be out of sync. A base station causes the timing calculation part to calculate the timing advance (TA) of a transmit timing from the mth mobile station; causes the timer adaptive control part to obtain the traveling speed or the time variation in TA of the mth mobile station and, adaptively determines and outputs as the timer update information the length of the mth first timer within an M number in total of synchronization timers and the length of the second timer of the mth mobile station and update the length of the mth first timer; and transmits from the downlink transmission part a downlink signal which contains timer update information.Type: GrantFiled: December 23, 2019Date of Patent: July 30, 2024Assignee: NEC CORPORATIONInventors: Hisashi Futaki, Jinsock Lee