Patents by Inventor Tomu Tamura

Tomu Tamura 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: 20230171660
    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: January 26, 2023
    Publication date: June 1, 2023
    Applicant: NEC Corporation
    Inventors: Tomu TAMURA, Hisashi Futaki
  • Patent number: 11595870
    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: Grant
    Filed: August 30, 2019
    Date of Patent: February 28, 2023
    Assignee: NEC CORPORATION
    Inventors: Tomu Tamura, Hisashi Futaki
  • Publication number: 20230021054
    Abstract: To provide a platform, a system, a method, and a program each adapted to predict an information distribution medium which attracts interest of a plurality of users. A platform according to the present disclosure includes: a gathering unit configured to gathering user information items that are used to predict an information distribution medium which attracts interest of a user out of a plurality of the information distribution media; and a prediction unit for predicting the information distribution medium which attracts interest of a plurality of the users at a prescribed time, which is a predetermined point in time ahead of the current time by a predetermined time length, out of the plurality of the information distribution media based on the user information items of the plurality of the users and information about the plurality of the information distribution media from the past up to the current time.
    Type: Application
    Filed: March 11, 2021
    Publication date: January 19, 2023
    Applicant: NEC Corporation
    Inventor: Tomu TAMURA
  • 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
  • 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
  • Publication number: 20210289405
    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: Application
    Filed: March 15, 2018
    Publication date: September 16, 2021
    Applicant: NEC CORPORATION
    Inventors: Tomu TAMURA, Yoshikazu KAKURA, Hisashi FUTAKI
  • Patent number: 11057807
    Abstract: In order to make it possible to appropriately select a secondary base station in a case of establishing dual connectivity after a handover, a base station 100 includes: a memory storing instructions; and one or more processors configured to execute the instructions to: communicate with a terminal apparatus 300 in accordance with a first radio access technology; obtain handover result information related to results of handovers from the base station 100 to other base stations 10, 20, 30, and 40; and transmit, when the terminal apparatus 300 performs a handover from the base station 100 to a base station 200 communicating in accordance with a second radio access technology, the handover result information to the base station 200.
    Type: Grant
    Filed: February 19, 2019
    Date of Patent: July 6, 2021
    Assignee: NEC CORPORATION
    Inventors: Tomu Tamura, Hisashi Futaki
  • Patent number: 10958573
    Abstract: To acquire, by a core network node, information necessary for control of a fixed broadband access network in more cases. An apparatus according to the present disclosure includes a communication processing unit configured to transmit, to a core network node, a first message when a wireless communication apparatus that communicates with a terminal apparatus communicating with a base station is changed from a first wireless communication apparatus to a second wireless communication apparatus, the first message including address information of the second wireless communication apparatus and transport identification information of the second wireless communication apparatus.
    Type: Grant
    Filed: September 26, 2016
    Date of Patent: March 23, 2021
    Assignee: NEC CORPORATION
    Inventors: Tomu Tamura, Yoshio Ueda
  • Patent number: 10849030
    Abstract: A base station includes a storage unit stores a neighbour relation table and a processing unit. The processing unit receives service information of a neighbour cell to its own cell, the service information being transmitted by another base station forming the neighbour cell to the own cell, the service information including at least one of an information element indicating whether the another base station has a function of a wireless LAN (Local Area Network) base station and an information element indicating whether the neighbour cell is a cell for dynamically adding a communication capacity. The processing unit registers the service information of the neighbour cell with the neighbour relation table.
    Type: Grant
    Filed: February 5, 2015
    Date of Patent: November 24, 2020
    Assignee: NEC CORPORATION
    Inventors: Tomu Tamura, Yoshio Ueda
  • Publication number: 20190289515
    Abstract: In order to make it possible to appropriately select a secondary base station in a case of establishing dual connectivity after a handover, a base station 100 includes: a memory storing instructions; and one or more processors configured to execute the instructions to: communicate with a terminal apparatus 300 in accordance with a first radio access technology; obtain handover result information related to results of handovers from the base station 100 to other base stations 10, 20, 30, and 40; and transmit, when the terminal apparatus 300 performs a handover from the base station 100 to a base station 200 communicating in accordance with a second radio access technology, the handover result information to the base station 200.
    Type: Application
    Filed: February 19, 2019
    Publication date: September 19, 2019
    Applicant: NEC CORPORATION
    Inventors: Tomu TAMURA, Hisashi Futaki
  • Patent number: 10420026
    Abstract: A wireless base station includes: a communication unit 101 configured to communicate with a mobile station which measures radio quality of a signal transmitted in each of a plurality of cells; an acquisition unit 102 configured to acquire load information related to a load of a network including a wireless base station forming the cell; and a control unit 103. The control unit 103 receives information indicating a measurement result of the radio quality of the signal transmitted in each of the plurality of cells and a state of a battery of the mobile station, from the mobile station via the communication unit, determines a signal, radio quality of which is to be measured by the mobile station, based on the measurement results of the radio qualities and the state of the battery of the mobile station, indicated in the information received, and the load information acquired by the acquisition unit, and notifies the signal determined to be measured to the mobile station via the communication unit.
    Type: Grant
    Filed: September 3, 2015
    Date of Patent: September 17, 2019
    Assignee: NEC CORPORATION
    Inventors: Tomu Tamura, Yoshio Ueda
  • Publication number: 20190068497
    Abstract: To acquire, by a core network node, information necessary for control of a fixed broadband access network in more cases. An apparatus according to the present disclosure includes a communication processing unit configured to transmit, to a core network node, a first message when a wireless communication apparatus that communicates with a terminal apparatus communicating with a base station is changed from a first wireless communication apparatus to a second wireless communication apparatus, the first message including address information of the second wireless communication apparatus and transport identification information of the second wireless communication apparatus.
    Type: Application
    Filed: September 26, 2016
    Publication date: February 28, 2019
    Applicant: NEC CORPORATION
    Inventors: Tomu TAMURA, Yoshio UEDA
  • Publication number: 20180084525
    Abstract: A core network node includes: a paging candidate storage unit that holds a candidate(s) of a base station(s) as a paging message transmission destination(s); a base station information storage unit that holds information about a communication function(s) of the candidate(s) of the base station(s); a paging destination selection unit that selects, when a certain mobile station is paged, a paging range from the candidate(s) of the base station(s), based on the communication function(s) of the candidate(s) of the base station(s); and a paging instruction unit that instructs a base station(s) corresponding to the selected range to perform paging.
    Type: Application
    Filed: April 1, 2016
    Publication date: March 22, 2018
    Applicant: NEC CORPORATION
    Inventors: Tomu TAMURA, Toshiyuki TAMURA, Sadafuku HAYASHI, Yoshio UEDA
  • Publication number: 20170289906
    Abstract: A wireless base station includes: a communication unit 101 configured to communicate with a mobile station which measures radio quality of a signal transmitted in each of a plurality of cells; an acquisition unit 102 configured to acquire load information related to a load of a network including a wireless base station forming the cell; and a control unit 103. The control unit 103 receives information indicating a measurement result of the radio quality of the signal transmitted in each of the plurality of cells and a state of a battery of the mobile station, from the mobile station via the communication unit, determines a signal, radio quality of which is to be measured by the mobile station, based on the measurement results of the radio qualities and the state of the battery of the mobile station, indicated in the information received, and the load information acquired by the acquisition unit, and notifies the signal determined to be measured to the mobile station via the communication unit.
    Type: Application
    Filed: September 3, 2015
    Publication date: October 5, 2017
    Applicant: NEC Corporation
    Inventors: Tomu TAMURA, Yoshio UEDA
  • Patent number: 9681415
    Abstract: A gateway device (10) according to the present invention includes a memory (11) that stores information regarding an environment around a radio base station; a controller (12) that generates a message for paging a mobile station which camps on the radio base station to execute processing for determining information of a radio base station to which the message is transmitted based on the stored information; and a transmission unit (13) that transmits the message. Paging optimization is thus achieved by reducing the number of paging messages.
    Type: Grant
    Filed: September 17, 2013
    Date of Patent: June 13, 2017
    Assignee: NEC Corporation
    Inventors: Tomu Tamura, Yoshio Ueda
  • Publication number: 20170034750
    Abstract: A base station includes a storage unit stores a neighbour relation table and a processing unit. The processing unit receives service information of a neighbour cell to its own cell, the service information being transmitted by another base station forming the neighbour cell to the own cell, the service information including at least one of an information element indicating whether the another base station has a function of a wireless LAN (Local Area Network) base station and an information element indicating whether the neighbour cell is a cell for dynamically adding a communication capacity. The processing unit registers the service information of the neighbour cell with the neighbour relation table.
    Type: Application
    Filed: February 5, 2015
    Publication date: February 2, 2017
    Applicant: NEC Corporation
    Inventors: Tomu TAMURA, Yoshio UEDA
  • Patent number: 9560695
    Abstract: An increase in communication load in a network due to increasing messages for requesting information is suppressed. When a message for requesting information and a response message thereto are sent and received between a communication device (N1-Nn) that is an information requester and an information provider (Nx) on a network (NW) via a communication device (1), the communication device (1) stores the information acquired from the response message in a response information storage section (4), and when any communication device requests at least part of the same information, a control section (5) creates a response message including the requested information and responds.
    Type: Grant
    Filed: December 9, 2013
    Date of Patent: January 31, 2017
    Assignee: NEC CORPORATION
    Inventors: Tomu Tamura, Yoshio Ueda, Atsushi Nakata
  • Patent number: 9510370
    Abstract: A radio base station is provided including a controller that generates a message including identification information of the radio base station and information indicating parameters based on a detected environment. The radio base station also includes a transmitter that transmits the generated message to a communication node.
    Type: Grant
    Filed: March 22, 2013
    Date of Patent: November 29, 2016
    Assignee: NEC CORPORATION
    Inventors: Tomu Tamura, Yoshio Ueda
  • Patent number: 9363813
    Abstract: A gateway communicating with a base station, includes a receiver that receives an incoming message including identification information of the base station and one or more parameters indicating an environment of the base station. The gateway also includes a memory that stores correspondence information including a cell identifier in association with at least one of the received identification information and the received one or more parameters. The gateway also includes a controller that determines the cell identifier, corresponding to a cell of the base station, based on the correspondence information and the incoming message, and generates an outgoing message, including the determined cell identifier, to be sent to a core network device. The gateway also includes a transmitter adapted to transmit the outgoing message.
    Type: Grant
    Filed: June 14, 2013
    Date of Patent: June 7, 2016
    Assignee: NEC CORPORATION
    Inventors: Tomu Tamura, Yoshio Ueda
  • Patent number: 9185645
    Abstract: A mobile communication system according to the present invention that can provide a mobile communication system capable of reducing power consumption by a radio base station apparatus includes a radio base station apparatus (1) that communicates with a mobile terminal (4), a location information management apparatus (3) that acquires location information of the mobile terminal (4), and a processing apparatus (2) that changes an operation state so that the radio base station apparatus (1) does not emit radio waves based on changes in the location information of the mobile terminal (4) acquired by the location information management apparatus (3). When the mobile terminal (4) moves from a position within a service area of the radio base station apparatus (1) to a position outside the service area, for example, the processing apparatus (2) changes the operation state so that the radio base station apparatus (1) does not emit radio waves.
    Type: Grant
    Filed: January 27, 2010
    Date of Patent: November 10, 2015
    Assignee: NEC CORPORATION
    Inventors: Tomu Tamura, Yoshio Ueda