Patents by Inventor Erina TAKESHITA

Erina TAKESHITA 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: 11411859
    Abstract: A network device (PE), a network control method and program which can reduce a BUM traffic packet loss even when a time is taken for route recalculation according to a routing protocol due to a malfunction in a network infrastructure are provided. A network device according to the present invention requests each PE connected to the same ES as that of the network device to perform DF reelection on the basis of a redundant PE list from which the network device has been deleted when cease of a BGP session is detected. In addition, the PE requested to perform the DF reelection executes the DF reelection based on the redundant PE list from which the aforementioned PE has been deleted. In the present invention, BUM traffic can be immediately forwarded from a PE that has become a new DF even when a time is taken for route recalculation according to the routing protocol because another PE connected to the same ES is caused to serve as a DF when the BGP session is ceased.
    Type: Grant
    Filed: February 18, 2019
    Date of Patent: August 9, 2022
    Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Erina Takeshita, Akihiro Morita, Hideaki Kimura, Gou Yazawa
  • Patent number: 11381466
    Abstract: With a network design apparatus, a network design method, and a network design processing program, a network configuration is designed for a network in which a transfer apparatus is disposed at each of a plurality of communication hubs and the communication hubs are connected via a link by a link portion apparatus in the transfer apparatus. In design of a network configuration, a threshold value of an inter-end delay and the number of redundant paths are calculated for each line on the basis of topology information, line information, and design parameter information. A path candidate set is calculated for each line on the basis of the threshold value of the inter-end delay and the number of redundant paths.
    Type: Grant
    Filed: February 28, 2019
    Date of Patent: July 5, 2022
    Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Erina Takeshita, Hideo Kawata, Shinichi Yoshihara
  • Patent number: 11381465
    Abstract: A network design apparatus, a network design method, and a network design processing program design a network configuration for a network in which a transfer apparatus is disposed at each of a plurality of communication hubs, and the communication hubs are connected via a link by a link portion apparatus in the transfer apparatus. In design of the network configuration, the optimal path candidates of each of the lines minimizing a total cost value in the overall network is calculated. In the calculation of the optimal path candidates of each of the lines, only a path candidate of each of the lines can be selected, and a combination candidate of link portion apparatuses for each of the links is derived uniquely from the selected path candidate of each of the lines.
    Type: Grant
    Filed: February 28, 2019
    Date of Patent: July 5, 2022
    Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Erina Takeshita, Hideo Kawata, Shinichi Yoshihara
  • Patent number: 11343181
    Abstract: An object of the present disclosure is to provide a provider network device, a network system, and a program that shorten a communication disconnection time during redundancy switching in a Single-Active redundant configuration. The provider network device according to the present disclosure notifies a CE that a VLAN, which has been communicating with traffic, is disabled due to setting of a block point or that new traffic communication is enabled due to releasing of the block point. This allows the CE to quickly delete a previously used transfer database and build up a new transfer database, and thus it is possible to shorten a communication disconnection time during redundancy switching.
    Type: Grant
    Filed: February 7, 2019
    Date of Patent: May 24, 2022
    Assignee: Nippon Telegraph and Telephone Corporation
    Inventors: Hideaki Kimura, Gou Yazawa, Akihiro Morita, Erina Takeshita
  • Patent number: 11336520
    Abstract: With a network design apparatus, a network design method, and a network design processing program, a network configuration is designed for a network in which a transfer apparatus is disposed at each of a plurality of communication hubs and the communication hubs are connected via a link by a link portion apparatus in the transfer apparatus. In design of a network configuration, an optimal combination candidate of a link portion apparatus for each link for minimizing a total cost value in an overall network is calculated on the basis of a combination candidate set of link portion apparatuses. The combination candidate set of the link portion apparatuses is configured using only combination candidates with a cost-effectiveness indicating a ratio of a total capacity to a total cost value of the link portion apparatus higher than a predetermined reference.
    Type: Grant
    Filed: February 28, 2019
    Date of Patent: May 17, 2022
    Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Erina Takeshita, Hideo Kawata, Shinichi Yoshihara
  • Publication number: 20220141123
    Abstract: An object is to provide a network device and the like that enable a first network that determines a traffic communication route using the Ethernet ring protocol and a second network that determines a traffic communication route by transmitting/receiving a control frame related to the traffic communication route within the network to be connected in a redundant configuration. When the network device according to the present invention has transitioned to a state in which there is no interface that can communicate with the first network and there is an interface that can communicate with the second network, it transitions to a standby state and further transmits information indicating that communication is impossible to the second network, and when there is an interface that can communicate with the first network and there is no interface that can communicate with the second network, it transitions to the standby state and further transmits communication route change information to the first network.
    Type: Application
    Filed: February 4, 2020
    Publication date: May 5, 2022
    Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Hideaki KIMURA, Erina TAKESHITA
  • Publication number: 20220141124
    Abstract: An object of the present disclosure is to enable efficient route assignment that guarantees a communication quality for each path between end terminals even if a state of a communication network varies. The present disclosure is a network controller apparatus connected to a communication network that performs data communication between end terminals by using a plurality of paths.
    Type: Application
    Filed: February 7, 2020
    Publication date: May 5, 2022
    Inventors: Erina Takeshita, Hideaki Kimura
  • Publication number: 20210351955
    Abstract: An object is to provide a means for causing wirings and device setting configurations to conform between communication devices and then establishing communication by generating a device setting configuration in accordance with wirings between the communication devices and reflecting the device setting configuration in interfaces of the communication devices. A device setting configuration for establishing communication between communication devices is generated based on information regarding an adjacent device acquired from each communication device, using a network setting information database configured to hold, in an associated manner, information regarding the communication device, information regarding the adjacent device connected directly to the communication device via a communication cable, and information regarding a device setting configuration to be set for an interface of the communication device used to connect to the adjacent device.
    Type: Application
    Filed: October 2, 2019
    Publication date: November 11, 2021
    Inventors: Hideaki Kimura, Erina Takeshita
  • Publication number: 20210203585
    Abstract: Provided are a control apparatus, a control method, and a program capable of designing efficient end-to-end monitoring in a VPN infrastructure. The control apparatus according to the present invention controls end-to-end monitoring in a VPN infrastructure in which communications of a plurality of users are superimposed. The control apparatus includes a user end database 11 that stores information about customer edge apparatuses (CEs) for each of the users, each of the CEs serving as a monitoring end of end-to-end monitoring, an end-to-end path database 12 that stores information about all links included in a path between the CEs, and an end-to-end monitoring management unit 13 that sets a monitoring path for end-to-end monitoring to between the CEs so that combinations of the monitoring path passing through each of the links are coprime.
    Type: Application
    Filed: August 13, 2019
    Publication date: July 1, 2021
    Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Erina TAKESHITA, Akihiro MORITA, Hideaki KIMURA, Go YAZAWA
  • Publication number: 20210099323
    Abstract: An object of the present invention is to provide an edge device, a control method, and a program with which the effects of loop generation can be minimized from the NW operator side while ensuring connection normality with the device of an NW user. An edge device according to the present invention physically closes an access port upon confirmation that the access port has been connected to an external device while the access port is in a physically released state and a DF state is undefined, notifies other edge devices within an EVPN MH configuration that the host device has entered a state in which the host device may become the DF and causes an EVPN function unit to calculate the DF state to be set, physically opens the access port when the calculation result indicates DF, and physically closes the access port when the calculation result indicates BDF.
    Type: Application
    Filed: February 18, 2019
    Publication date: April 1, 2021
    Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Gou YAZAWA, Hideaki KIMURA, Erina TAKESHITA, Akihiro MORITA
  • Publication number: 20210075688
    Abstract: With a network design apparatus, a network design method, and a network design processing program, a network configuration is designed for a network in which a transfer apparatus is disposed at each of a plurality of communication hubs and the communication hubs are connected via a link by a link portion apparatus in the transfer apparatus. In design of a network configuration, a threshold value of an inter-end delay and the number of redundant paths are calculated for each line on the basis of topology information, line information, and design parameter information. A path candidate set is calculated for each line on the basis of the threshold value of the inter-end delay and the number of redundant paths.
    Type: Application
    Filed: February 28, 2019
    Publication date: March 11, 2021
    Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Erina TAKESHITA, Hideo KAWATA, Shinichi YOSHIHARA
  • Publication number: 20210075676
    Abstract: With a network design apparatus, a network design method, and a network design processing program, a network configuration is designed for a network in which a transfer apparatus is disposed at each of a plurality of communication hubs and the communication hubs are connected via a link by a link portion apparatus in the transfer apparatus. In design of a network configuration, an optimal combination candidate of a link portion apparatus for each link for minimizing a total cost value in an overall network is calculated on the basis of a combination candidate set of link portion apparatuses. The combination candidate set of the link portion apparatuses is configured using only combination candidates with a cost-effectiveness indicating a ratio of a total capacity to a total cost value of the link portion apparatus higher than a predetermined reference.
    Type: Application
    Filed: February 28, 2019
    Publication date: March 11, 2021
    Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Erina TAKESHITA, Hideo KAWATA, Shinichi YOSHIHARA
  • Publication number: 20210044486
    Abstract: A network design apparatus, a network design method, and a network design processing program design a network configuration for a network in which a transfer apparatus is disposed at each of a plurality of communication hubs, and the communication hubs are connected via a link by a link portion apparatus in the transfer apparatus. In design of the network configuration, the optimal path candidates of each of the lines minimizing a total cost value in the overall network is calculated. In the calculation of the optimal path candidates of each of the lines, only a path candidate of each of the lines can be selected, and a combination candidate of link portion apparatuses for each of the links is derived uniquely from the selected path candidate of each of the lines.
    Type: Application
    Filed: February 28, 2019
    Publication date: February 11, 2021
    Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Erina TAKESHITA, Hideo KAWATA, Shinichi YOSHIHARA
  • Publication number: 20210036954
    Abstract: An object of the present disclosure is to provide a provider network device, a network system, and a program that shorten a communication disconnection time during redundancy switching in a Single-Active redundant configuration. The provider network device according to the present disclosure notifies a CE that a VLAN, which has been communicating with traffic, is disabled due to setting of a block point or that new traffic communication is enabled due to releasing of the block point. This allows the CE to quickly delete a previously used transfer database and build up a new transfer database, and thus it is possible to shorten a communication disconnection time during redundancy switching.
    Type: Application
    Filed: February 7, 2019
    Publication date: February 4, 2021
    Inventors: Hideaki Kimura, Gou Yazawa, Akihiro Morita, Erina Takeshita
  • Publication number: 20210014125
    Abstract: With a network design apparatus, a network design method, and a network design processing program, a network configuration is designed for a network in which a transfer apparatus is disposed for each of a plurality of communication hubs and the communication hubs are connected via a link by a link portion apparatus in the transfer apparatus. In design of a network configuration, a maximum total capacity of a link portion apparatus is calculated, and a combination candidate set of the link portion apparatus including only combination candidates of which a total capacity is equal to or smaller than the maximum total capacity is calculated.
    Type: Application
    Filed: February 28, 2019
    Publication date: January 14, 2021
    Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Erina TAKESHITA, Hideo KAWATA, Shinichi YOSHIHARA
  • Publication number: 20200412640
    Abstract: A network device (PE), a network control method and program which can reduce a BUM traffic packet loss even when a time is taken for route recalculation according to a routing protocol due to a malfunction in a network infrastructure are provided. A network device according to the present invention requests each PE connected to the same ES as that of the network device to perform DF reelection on the basis of a redundant PE list from which the network device has been deleted when cease of a BGP session is detected. In addition, the PE requested to perform the DF reelection executes the DF reelection based on the redundant PE list from which the aforementioned PE has been deleted. In the present invention, BUM traffic can be immediately forwarded from a PE that has become a new DF even when a time is taken for route recalculation according to the routing protocol because another PE connected to the same ES is caused to serve as a DF when the BGP session is ceased.
    Type: Application
    Filed: February 18, 2019
    Publication date: December 31, 2020
    Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Erina TAKESHITA, Akihiro MORITA, Hideaki KIMURA, Gou YAZAWA
  • Publication number: 20200403879
    Abstract: With a network design apparatus, a network design method, and a network design processing program, a network configuration is designed for a network in which a transfer apparatus is disposed for each of a plurality of communication hubs and the communication hubs are connected via a link by a link portion apparatus in the transfer apparatus. In design of a network configuration, an optimal path candidate of each of the lines, an optimal link portion apparatus combination candidate of each link, and an optimal transfer apparatus combination candidate at each of the communication hubs minimizing a total cost value in an overall network are calculated on the basis of a path candidate set, an interface combination candidate set, and a combination candidate set of a transfer apparatus.
    Type: Application
    Filed: February 28, 2019
    Publication date: December 24, 2020
    Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Erina TAKESHITA, Shinichi YOSHIHARA, Hideo KAWATA