Patents by Inventor Sadafuku Hayashi

Sadafuku Hayashi 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).

  • Publication number: 20220191823
    Abstract: A communication system is disclosed in which am anchor base station receives, from a core network node, downlink data for a communication device. The base station attempts (e.g. by RAN-based paging) to initiate communication with the communication device, and when the communication device does not respond to the attempt to initiate communication, the base station sends a message to the core network node, the message requesting initiation of a paging procedure for the communication device (e.g. S1-based paging).
    Type: Application
    Filed: March 8, 2022
    Publication date: June 16, 2022
    Applicant: NEC Corporation
    Inventors: Sivapathalingham SIVAVAKEESAR, Robert PATERSON, Toshiyuki TAMURA, Sadafuku HAYASHI
  • Publication number: 20220183095
    Abstract: An apparatus and a method which make it possible to suppress occurrence of an unnecessary operation in a case of an SCG bearer. The apparatus includes: a communication processing unit configured to communicate with a terminal apparatus over a Master Cell Group (MCG) bearer for dual connectivity of the terminal apparatus; a request unit configured to request a secondary base station, which communicates with the terminal apparatus over a Secondary Cell Group (SCG) bearer for the dual connectivity, to report activity-related information related to an activity of the terminal apparatus in an SCG of the secondary base station; and an information acquisition unit configured to acquire the activity-related information reported by the secondary base station.
    Type: Application
    Filed: March 1, 2022
    Publication date: June 9, 2022
    Applicant: NEC Corporation
    Inventor: Sadafuku HAYASHI
  • 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
  • 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
  • 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
  • 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
  • Patent number: 11330492
    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: Grant
    Filed: May 16, 2017
    Date of Patent: May 10, 2022
    Assignee: NEC CORPORATION
    Inventors: Hisashi Futaki, Sadafuku Hayashi
  • Publication number: 20220132375
    Abstract: A communication system is disclosed in which a base station apparatus obtains, from at least one secondary node (SN) handling user-plane transmissions for a user equipment (UE), information identifying a total integrity protected data rate for all Protocol Data Unit (PDU) sessions associated with the UE at that SN. When the information from the at least one SN indicates that the total integrity protected data rate for all PDU sessions associated with the UE at that SN exceeds an associated data rate portion, the base station apparatus updates at least one of: said data rate portion; and at least one PDU session associated with the UE at that SN.
    Type: Application
    Filed: February 12, 2020
    Publication date: April 28, 2022
    Applicant: NEC Corporation
    Inventors: Chadi KHIRALLAH, Jagdeep Ahluwalia SINGH, Sadafuku HAYASHI, Neeraj GUPTA
  • Patent number: 11310852
    Abstract: An apparatus and a method which make it possible to suppress occurrence of an unnecessary operation in a case of an SCG bearer. The apparatus includes: a communication processing unit configured to communicate with a terminal apparatus over a Master Cell Group (MCG) bearer for dual connectivity of the terminal apparatus; a request unit configured to request a secondary base station, which communicates with the terminal apparatus over a Secondary Cell Group (SCG) bearer for the dual connectivity, to report activity-related information related to an activity of the terminal apparatus in an SCG of the secondary base station; and an information acquisition unit configured to acquire the activity-related information reported by the secondary base station.
    Type: Grant
    Filed: August 4, 2016
    Date of Patent: April 19, 2022
    Assignee: NEC CORPORATION
    Inventor: Sadafuku Hayashi
  • Publication number: 20220104087
    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 31, 2019
    Publication date: March 31, 2022
    Applicant: NEC Corporation
    Inventors: Hisashi FUTAKI, Sadafuku HAYASHI
  • Publication number: 20220086704
    Abstract: 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: Application
    Filed: October 31, 2019
    Publication date: March 17, 2022
    Applicant: NEC Corporation
    Inventors: Hisashi FUTAKI, Sadafuku HAYASHI
  • Publication number: 20220070740
    Abstract: 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: Application
    Filed: October 31, 2019
    Publication date: March 3, 2022
    Applicant: NEC Corporation
    Inventors: Hisashi FUTAKI, Sadafuku HAYASHI
  • Patent number: 11265704
    Abstract: To enable security enhancement in the case of employing beamforming. A first apparatus according to the present invention includes: an information obtaining unit configured to obtain information related to beam selection; and a key generating unit configured to generate a security key for radio communication between a base station and a terminal apparatus based on the information related to the beam selection.
    Type: Grant
    Filed: June 5, 2017
    Date of Patent: March 1, 2022
    Assignee: NEC CORPORATION
    Inventors: Sadafuku Hayashi, Hisashi Futaki, Anand Prasad
  • Patent number: 11252643
    Abstract: A second RAN node (2) sends to a radio terminal (3), via a first RAN node (1), an indication of available on-demand system information that is available in a cell of the second RAN node (2). It is thus, for example, possible to enabling notifying a UE of an indication about on-demand system information available in a cell served by a secondary gNB of Inter-RAT dual connectivity between E-UTRA and NR, or available in a cell served by a target gNB of Inter-RAT handover from E-UTRA to NR.
    Type: Grant
    Filed: November 21, 2017
    Date of Patent: February 15, 2022
    Assignee: NEC CORPORATION
    Inventors: Hisashi Futaki, Sadafuku Hayashi
  • Publication number: 20220046480
    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: October 27, 2021
    Publication date: February 10, 2022
    Applicant: NEC Corporation
    Inventors: Hisashi FUTAKI, Sadafuku HAYASHI
  • Publication number: 20220046427
    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: October 20, 2021
    Publication date: February 10, 2022
    Applicant: NEC Corporation
    Inventors: Hisashi FUTAKI, Sadafuku Hayashi
  • 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
  • Publication number: 20220007375
    Abstract: A wireless communication system of the present invention includes a first base station (30) and a second base station (20) configured to be capable of transmitting downlink data received from a core network to a terminal via the second base station (20) and the first base station (30). The second base station (20) transmits, to the first base station (30), information for identifying downlink data to be discarded from among the downlink data transmitted to the first base station (30) and a command for discarding the downlink data identified by the information. The first base station (30) discards downlink data not transmitted to the terminal from among the downlink data identified by the information.
    Type: Application
    Filed: June 28, 2021
    Publication date: January 6, 2022
    Applicant: NEC Corporation
    Inventor: Sadafuku HAYASHI
  • 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
  • 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