Patents by Inventor Kazuo Sugai

Kazuo Sugai 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: 20200036645
    Abstract: A communication system, comprising: a communication apparatus controlling transmission and reception of data in a network connecting a server and a user terminal; and a management apparatus, the network including an edge apparatus, the communication apparatus including a relay unit which has a queue for each communication flow, and controls the transmission and reception of data using the queue, the management apparatus including a monitoring unit which identifies a communication flow where data loss has occurred, calculates modifications for settings for communication control used for a queue corresponding to the identified communication flow, and transmits to the communication apparatus a modification command including the modifications, and the relay unit modifies settings for communication control using the queue corresponding to the identified communication flow on the basis of the modifications included in the modification command.
    Type: Application
    Filed: July 8, 2019
    Publication date: January 30, 2020
    Inventors: Koyuru NAGAO, Kazuo SUGAI, Takumi NAKAKI, Takayuki MURANAKA, Takeshi GOTOU
  • Publication number: 20190307031
    Abstract: Disclosed is an electronic part package body including a carrier tape having a plurality of electronic part housing portions arranged in a longitudinal direction, and a cover tape covering at least the electronic part housing portions by being laminated to the carrier tape. The carrier tape includes a first bonded portion and a second bonded portion that are arranged on outsides of both end portions of the plurality of electronic part housing portions, both end portions being end portions in a width direction of the carrier tape, and are arranged in the longitudinal direction of the carrier tape. One of or both the first bonded portion and the second bonded portion include a reentrant part disposed so as to be continuous from the outside of an electronic part housing portion to a region between electronic part housing portions.
    Type: Application
    Filed: March 19, 2019
    Publication date: October 3, 2019
    Inventors: KAZUO SUGAI, ATSUSHI SATORI
  • Publication number: 20190273690
    Abstract: A communication device: stores flow condition information for identifying a flow and flow counter information that indicates, for each flow, an input flow volume of a flow inputted to the communication device, and an output flow volume of a flow outputted by the communication device; identifies a flow to which data inputted to the communication device belongs, with reference to the flow condition information; updates the input flow volume of the flow in the flow counter information; identifies a flow to which data outputted by the communication device belongs, with reference to the flow condition information; updates the output flow volume of the flow in the flow counter information; and identifies a flow in which a communication anomaly has occurred on the basis of results of a comparison process for comparing the input flow volume to the output flow volume with reference to the flow counter information.
    Type: Application
    Filed: February 5, 2019
    Publication date: September 5, 2019
    Inventors: Shinichi AKAHANE, Nobuhito MATSUYAMA, Mitsuru NAGASAKA, Kazuo SUGAI, Takayuki MURANAKA
  • Patent number: 10389626
    Abstract: A transfer device transfers communication data, comprising: a search unit having a first search means that includes a first table and a first search circuit, the search unit referring to the first table using the first search circuit to search for the first transfer destination information from the first destination information; a search control unit that is a reconfigurable mechanism that creates search designation information and executes a first search designation information creation process of creating first search designation information; a control unit that controls the search unit and creates in the search unit at least a second search means including a second table and a second search circuit, the control unit controlling the search control unit to add to the search control unit a second search designation information creation process; and a transfer unit that receives the communication data and transmits the communication data to a transfer destination.
    Type: Grant
    Filed: March 6, 2018
    Date of Patent: August 20, 2019
    Assignee: Alaxala Networks Corporation
    Inventors: Takeshi Kumagai, Kazuo Sugai, Shinichi Akahane, Takayuki Muranaka
  • Patent number: 10326705
    Abstract: In a core node, packet related information included in a packet is extracted, a virtual queue length, which is an estimated value of a queue length of a transmission queue addressed to a user in an edge device, is calculated and held on a user basis on the basis of the packet related information and band information of a line between the edge device and the user, and a determination is made, on a user basis, as to whether or not band control is required, on the basis of the virtual queue length and predetermined conditions so as to perform, on the basis of the result of the determination, the band control of the packet addressed to the user on a user basis in a packet relay part.
    Type: Grant
    Filed: March 10, 2017
    Date of Patent: June 18, 2019
    Assignee: Alaxala Networks Corporation
    Inventors: Kazuo Sugai, Takeshi Kumagai, Yuichi Ishikawa, Naoya Kumita
  • Publication number: 20180287939
    Abstract: A transfer device transfers communication data, comprising: a search unit having a first search means that includes a first table and a first search circuit, the search unit referring to the first table using the first search circuit to search for the first transfer destination information from the first destination information; a search control unit that is a reconfigurable mechanism that creates search designation information and executes a first search designation information creation process of creating first search designation information; a control unit that controls the search unit and creates in the search unit at least a second search means including a second table and a second search circuit, the control unit controlling the search control unit to add to the search control unit a second search designation information creation process; and a transfer unit that receives the communication data and transmits the communication data to a transfer destination.
    Type: Application
    Filed: March 6, 2018
    Publication date: October 4, 2018
    Inventors: Takeshi KUMAGAI, Kazuo SUGAI, Shinichi AKAHANE, Takayuki MURANAKA
  • Patent number: 9830403
    Abstract: A communication apparatus comprises a CAM, an action determination unit, and a CAM diagnosis unit. The CAM includes, a plurality of entries each storing therein at least a portion of header information of frame, and a search circuit for each entry configured to determine whether or not a search key matches data stored at the entry. The search key is correlated with information indicating whether or not an entry matching the search key and an expected value of a search result including identification information of an entry matching the search key. The CAM diagnosis unit causes the CAM to search for an entry matching the search key. The CAM diagnosis unit diagnoses a failure occurring at the search circuit of an entry to be the test object when the result of the search does not match the expected value of a search result correlated to the search key.
    Type: Grant
    Filed: December 22, 2014
    Date of Patent: November 28, 2017
    Assignee: Alaxala Networks Corporation
    Inventors: Shinichi Akahane, Kazuo Sugai, Tomohiko Kouno, Takao Nara
  • Publication number: 20170289055
    Abstract: In a core node, packet related information included in a packet is extracted, a virtual queue length, which is an estimated value of a queue length of a transmission queue addressed to a user in an edge device, is calculated and held on a user basis on the basis of the packet related information and band information of a line between the edge device and the user, and a determination is made, on a user basis, as to whether or not band control is required, on the basis of the virtual queue length and predetermined conditions so as to perform, on the basis of the result of the determination, the band control of the packet addressed to the user on a user basis in a packet relay part.
    Type: Application
    Filed: March 10, 2017
    Publication date: October 5, 2017
    Inventors: Kazuo SUGAI, Takeshi KUMAGAI, Yuichi ISHIKAWA, Naoya KUMITA
  • Patent number: 9276876
    Abstract: A data transfer apparatus includes a first memory, a second memory, a search unit, and a data transmitting/receiving unit. The first memory holds information that associates a search key with an address. The second memory holds information that associates the address with verification information which is generated by a predetermined generation method based on at least a portion of the search key. The search unit generates the search key based on the received data, obtains, from the first memory, the address that is associated with the generated search key, obtains, from the second memory, the verification information that is associated with the obtained address, and verifies the verification information that is generated by the predetermined generation method based on at least a portion of the generated search key with the verification information obtained from the second memory. The data transmitting/receiving unit executes processing based on a result of the verification.
    Type: Grant
    Filed: December 4, 2013
    Date of Patent: March 1, 2016
    Assignee: ALAXALA NETWORKS CORPORATION
    Inventors: Yasuhiro Kodama, Shinichi Akahane, Kazuo Sugai, Takao Nara
  • Publication number: 20150242534
    Abstract: A communication apparatus comprises a CAM, an action determination unit, and a CAM diagnosis unit. The CAM includes, a plurality of entries each storing therein at least a portion of header information of frame, and a search circuit for each entry configured to determine whether or not a search key matches data stored at the entry. The search key is correlated with information indicating whether or not an entry matching the search key and an expected value of a search result including identification information of an entry matching the search key. The CAM diagnosis unit causes the CAM to search for an entry matching the search key. The CAM diagnosis unit diagnoses a failure occurring at the search circuit of an entry to be the test object when the result of the search does not match the expected value of a search result correlated to the search key.
    Type: Application
    Filed: December 22, 2014
    Publication date: August 27, 2015
    Inventors: Shinichi AKAHANE, Kazuo SUGAI, Tomohiko KOUNO, Takao NARA
  • Patent number: 8953337
    Abstract: The present invention relates to an electronic device including plural circuit board units that can be removed from the electronic device. The electronic device is designed to increase a data transfer rate between the circuit board units by using a circuit board for interconnect for electrically coupling the circuit board units placed in the electronic device, and using a cable for electrically or optically coupling the circuit board units placed in the electric device, or both of the cables.
    Type: Grant
    Filed: January 12, 2011
    Date of Patent: February 10, 2015
    Assignee: Alaxala Networks Corporation
    Inventors: Masaaki Inoue, Takashi Matsumoto, Kazuhiro Matsuo, Junji Baba, Manabu Sawa, Kazuo Sugai
  • Patent number: 8937869
    Abstract: The communication device has a frame transfer unit that executes frame transfer via the first communication link and the second communication link, a link confirmation frame sending unit, and a return link confirmation frame monitoring unit. The link confirmation frame sending unit causes the frame transfer processing unit to send a link confirmation frame for use in confirming a normal link status via the first communication link from the communication device to the counterpart communication device. The return link confirmation frame monitoring unit performs fault detection of the first and second communication links by monitoring a return link confirmation frame which is to be returned from the counterpart communication device to the communication device via the second communication link when the counterpart communication device receives the link confirmation frame via the first communication link.
    Type: Grant
    Filed: October 11, 2011
    Date of Patent: January 20, 2015
    Assignee: ALAXALA Networks Corporation
    Inventors: Shinichi Akahane, Teruo Kaganoi, Tomohiko Kohno, Kazuo Sugai
  • Publication number: 20140207897
    Abstract: A data transfer apparatus includes a first memory, a second memory, a search unit, and a data transmitting/receiving unit. The first memory holds information that associates a search key with an address. The second memory holds information that associates the address with verification information which is generated by a predetermined generation method based on at least a portion of the search key. The search unit generates the search key based on the received data, obtains, from the first memory, the address that is associated with the generated search key, obtains, from the second memory, the verification information that is associated with the obtained address, and verifies the verification information that is generated by the predetermined generation method based on at least a portion of the generated search key with the verification information obtained from the second memory. The data transmitting/receiving unit executes processing based on a result of the verification.
    Type: Application
    Filed: December 4, 2013
    Publication date: July 24, 2014
    Applicant: ALAXALA Networks Corporation
    Inventors: Yasuhiro KODAMA, Shinichi AKAHANE, Kazuo SUGAI, Takao NARA
  • Patent number: 8774001
    Abstract: A relay device of relaying a communication packet is disclosed, which comprises: an input module configured to receive the communication packet as an input; a buffer configured to have a plurality of queues and temporarily accumulated the received communication packet; a sorter configured to sort the received communication packet to one of the plurality of queues, depending on a specific value obtained by a predetermined function that gives an aggregate output from an input which is transfer information regarding transfer of the communication packet; and a band controller configured to control a bandwidth for each of the plurality of queues and output communication packets accumulated in the plurality of queues for transmission of the communication packets. This ensures the quality of service, while saving the capacity of the buffer used for the queues.
    Type: Grant
    Filed: January 25, 2012
    Date of Patent: July 8, 2014
    Assignee: Alaxala Networks Corporation
    Inventors: Takeshi Kumagai, Nobuhito Matsuyama, Takeshi Aimoto, Toshio Doi, Kazuo Sugai
  • Patent number: 8625423
    Abstract: A system having a plurality of network devices, each including: an interface module including a plurality of physical ports to transmit and receive packets; a computing module configured to execute a computing process with a computational expression using seed information, the seed information including at least one of destination information and source information associated with a received packet; a destination search module configured to, based on the result of the computation, select a physical port for transmission of the received packet from a plurality of candidate ports among the plurality of physical ports; and a modifying module configured to modify the computational expression, wherein the plurality of network devices include preceding-stage and subsequent-stage network devices, the subsequent-stage network device being directly coupled to the preceding-stage network device with physical wiring, and wherein the subsequent-stage and preceding-stage network devices are configured to use different exp
    Type: Grant
    Filed: June 27, 2011
    Date of Patent: January 7, 2014
    Assignee: ALAXALA Networks Corporation
    Inventors: Hiroki Yano, Kazuo Sugai, Shinichi Akahane, Takao Nara
  • Publication number: 20120188874
    Abstract: A relay device of relaying a communication packet is disclosed, which comprises: an input module configured to receive the communication packet as an input; a buffer configured to have a plurality of queues and temporarily accumulated the received communication packet; a sorter configured to sort the received communication packet to one of the plurality of queues, depending on a specific value obtained by a predetermined function that gives an aggregate output from an input which is transfer information regarding transfer of the communication packet; and a band controller configured to control a bandwidth for each of the plurality of queues and output communication packets accumulated in the plurality of queues for transmission of the communication packets. This ensures the quality of service, while saving the capacity of the buffer used for the queues.
    Type: Application
    Filed: January 25, 2012
    Publication date: July 26, 2012
    Inventors: TAKESHI KUMAGAI, Nobuhito Matsuyama, Takeshi Aimoto, Toshio Doi, Kazuo Sugai
  • Patent number: 8139576
    Abstract: A network routing apparatus in which packet forwarding units for performing a packet forwarding process are arranged in parallel to one another, a packet distribution unit for distributing packets to the packet forwarding units arranged in parallel to one another, a packet rearrangement unit for rearranging outputs of the packet forwarding units are provided in the network routing apparatus, and packet retrieving units for retrieving packet headers in the packet forwarding units are further arranged in parallel to one another.
    Type: Grant
    Filed: September 2, 2008
    Date of Patent: March 20, 2012
    Assignee: Hitachi, Ltd.
    Inventors: Kazuo Sugai, Nobuhito Matsuyama
  • Publication number: 20120026894
    Abstract: The communication device has a frame transfer unit that executes frame transfer via the first communication link and the second communication link, a link confirmation frame sending unit, and a return link confirmation frame monitoring unit. The link confirmation frame sending unit causes the frame transfer processing unit to send a link confirmation frame for use in confirming a normal link status via the first communication link from the communication device to the counterpart communication device. The return link confirmation frame monitoring unit performs fault detection of the first and second communication links by monitoring a return link confirmation frame which is to be returned from the counterpart communication device to the communication device via the second communication link when the counterpart communication device receives the link confirmation frame via the first communication link.
    Type: Application
    Filed: October 11, 2011
    Publication date: February 2, 2012
    Inventors: Shinichi AKAHANE, Teruo Kaganoi, Tomohiko Kohno, Kazuo Sugai
  • Patent number: 8064353
    Abstract: The communication device has a frame transfer unit that executes frame transfer via the first communication link and the second communication link, a link confirmation frame sending unit, and a return link confirmation frame monitoring unit. The link confirmation frame sending unit causes the frame transfer processing unit to send a link confirmation frame for use in confirming a normal link status via the first communication link from the communication device to the counterpart communication device. The return link confirmation frame monitoring unit performs fault detection of the first and second communication links by monitoring a return link confirmation frame which is to be returned from the counterpart communication device to the communication device via the second communication link when the counterpart communication device receives the link confirmation frame via the first communication link.
    Type: Grant
    Filed: July 23, 2008
    Date of Patent: November 22, 2011
    Assignee: ALAXALA Networks Corporation
    Inventors: Shinichi Akahane, Teruo Kaganoi, Tomohiko Kohno, Kazuo Sugai
  • Publication number: 20110255534
    Abstract: A system having a plurality of network devices, each including: an interface module including a plurality of physical ports to transmit and receive packets; a computing module configured to execute a computing process with a computational expression using seed information, the seed information including at least one of destination information and source information associated with a received packet; a destination search module configured to, based on the result of the computation, select a physical port for transmission of the received packet from a plurality of candidate ports among the plurality of physical ports; and a modifying module configured to modify the computational expression, wherein the plurality of network devices include preceding-stage and subsequent-stage network devices, the subsequent-stage network device being directly coupled to the preceding-stage network device with physical wiring, and wherein the subsequent-stage and preceding-stage network devices are configured to use different exp
    Type: Application
    Filed: June 27, 2011
    Publication date: October 20, 2011
    Inventors: Hiroki YANO, Kazuo Sugai, Shinichi Akahane, Takao Nara