Patents by Inventor Shinichi Akahane

Shinichi Akahane 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: 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
  • 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: 9935897
    Abstract: Network switching arrangements including: setting an operation mode of a target switching block to a operation mode that is different from an operation mode of a first switching block while the first switching block is handling a switching process, the target switching block being one switching block selected from second switching blocks; performing a switchover process including starting the switching process using the target switching block instead of the first switching block, after completion of setting the operation mode of the target switching block; and copying the switching information held by the first switching block to the target switching block, prior to starting the switching process using the target switching block, after completion of setting the operation mode of the target switching block.
    Type: Grant
    Filed: December 19, 2016
    Date of Patent: April 3, 2018
    Assignee: ALAXALA NETWORKS CORPORATION
    Inventors: Masayuki Shinohara, Nobuhito Matsuyama, Takayuki Muranaka, Isao Kimura, Shinichi Akahane
  • 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: 20170104693
    Abstract: Network switching arrangements including: setting an operation mode of a target switching block to a operation mode that is different from an operation mode of a first switching block while the first switching block is handling a switching process, the target switching block being one switching block selected from second switching blocks; performing a switchover process including starting the switching process using the target switching block instead of the first switching block, after completion of setting the operation mode of the target switching block; and copying the switching information held by the first switching block to the target switching block, prior to starting the switching process using the target switching block, after completion of setting the operation mode of the target switching block.
    Type: Application
    Filed: December 19, 2016
    Publication date: April 13, 2017
    Applicant: ALAXALA NETWORKS CORPORATION
    Inventors: Masayuki Shinohara, Nobuhito Matsuyama, Takayuki Muranaka, Isao Kimura, Shinichi Akahane
  • Patent number: 9559986
    Abstract: Network switching arrangements including: setting an operation mode of a target switching block to a operation mode that is different from an operation mode of a first switching block while the first switching block is handling a switching process, the target switching block being one switching block selected from second switching blocks; performing a switchover process including starting the switching process using the target switching block instead of the first switching block, after completion of setting the operation mode of the target switching block; and copying the switching information held by the first switching block to the target switching block, prior to starting the switching process using the target switching block, after completion of setting the operation mode of the target switching block.
    Type: Grant
    Filed: June 24, 2013
    Date of Patent: January 31, 2017
    Assignee: ALAXALA NETWORKS CORPORATION
    Inventors: Masayuki Shinohara, Nobuhito Matsuyama, Takayuki Muranaka, Isao Kimura, Shinichi Akahane
  • 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: 9009342
    Abstract: A network relay apparatus which conducts data transfer by using a plurality of network LSIs includes a transfer engine unit having at least two network LSIs and a central control unit which controls the operation state of the network relay apparatus. The transfer engine unit includes the network LSIs capable of changing over at least one of a clock and an operation which differ every function block, a load judgment unit for judging a load laid upon each of function blocks in the network LSI, and a frequency voltage control unit for individually changing over at least one of the clock and operation voltage supplied to each function block on the basis of the load judged by the load judgment unit.
    Type: Grant
    Filed: August 16, 2012
    Date of Patent: April 14, 2015
    Assignee: ALAXALA Networks Corporation
    Inventors: Yoshihiro Nakao, Shinichi Akahane, Masayuki Shinohara, Atsushi Serizawa
  • Patent number: 8953591
    Abstract: In a conventional “distributed” integrated network node architecture, specific judgment processes cannot be executed in any routing and transferring unit. The routing and transferring unit is required to share judgment process related information with an enhanced processing unit or other routing and transferring units. Thus, when using enhanced processing units, manufacturing costs increase, while processing speed decreases when routing and transferring units cooperate. If any flow is disposed during a transfer from a packet transferring unit in a routing and transferring unit to a processing unit, the packet is disposed regardless of packet priority. In the present invention, a packet related to a specific judgment process is always transmitted to a specific routing and transferring unit from a line interface unit. If an inputted flow is over the transferring capacity, the line interface unit analyzes the packet header and determines the type, transport priority, and disposal priority of the packet.
    Type: Grant
    Filed: August 9, 2012
    Date of Patent: February 10, 2015
    Assignee: Alaxala Networks Corporation
    Inventors: Masaki Yamada, Mitsuru Nagasaka, Takayuki Muranaka, Yoshihiro Nakao, Shinichi Akahane
  • 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
  • Patent number: 8826045
    Abstract: A display apparatus including: a collecting unit that collects power consumption information, wherein the power consumption information shows power consumption of a connecting device, and the connecting device interconnects a plurality of communication paths in a computer network; and a display unit that displays power consumption of the computer network, based on the power consumption information and constituent units based on a virtual network which is configured virtually on the computer network.
    Type: Grant
    Filed: December 11, 2012
    Date of Patent: September 2, 2014
    Assignee: Alaxala Networks Corporation
    Inventors: Yasuhiro Kodama, Mitsuru Nagasaka, Shinichi Akahane, Tomohiko Kouno, Teruo Kaganoi, Takeki Yazaki
  • Patent number: 8812754
    Abstract: A network relay device includes a packet buffer for temporarily storing a received packet, and a packet buffer control section for changing an effective buffer number depending on the received amount of packet. When a traffic amount is small, the packet buffer control section reduces the power consumption by stopping the feeding of power or the supply of clock to a part of the packet buffers. The network relay device further includes plural table memories storing a table for deciding the transfer destination of packet, and a table memory control section for changing an effective table number according to a required number of table entries. When the required table entry number is small, the table memory control section reduces the power consumption by stopping the feeding of power or the supply of clock to a part of the table memories.
    Type: Grant
    Filed: June 11, 2010
    Date of Patent: August 19, 2014
    Assignee: Alaxala Networks Corporation
    Inventors: Kentaroh Sugawara, Shinichi Akahane, Hiroki Yano, Yuichi Ishikawa
  • 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: 8755288
    Abstract: A network system comprises a first communication device having a first address connected, using a network, to a second communication device having a second address. The first communication device includes a monitor frame transmitter configured to generate a monitor frame including the second address as a destination address and the first address as a source address, and to output the generated monitor frame to the network; and a monitoring-response frame monitor configured to monitor reception of a monitoring-response frame sent back from the second communication device. The second communication device includes: a monitoring-response frame transmitter configured to, in response to reception of the monitor frame, generate the monitoring-response frame by exchanging the destination address in the received monitor frame for a source address and the source address in the received monitor frame for a destination address, and output the generated monitoring-response frame to the network.
    Type: Grant
    Filed: July 27, 2011
    Date of Patent: June 17, 2014
    Assignee: Alaxala Networks Corporation
    Inventors: Shinichi Akahane, Teruo Kaganoi, Tetsuya Nagata
  • Patent number: 8705540
    Abstract: The network relay apparatus includes: a plurality of distributed processing units configured to receive and send a packet from and to an external device; an integrated processing unit connected with the plurality of distributed processing units; and a mode selector configured to change over a processing mode of the network relay apparatus between a distributed processing mode and an integrated processing mode, based on at least either one of a load applied to the network relay apparatus and a packet type determined according to header information of the received packet.
    Type: Grant
    Filed: October 21, 2009
    Date of Patent: April 22, 2014
    Assignee: Alaxala Networks Corporation
    Inventor: Shinichi Akahane
  • 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: 20140003280
    Abstract: Network switching arrangements including: setting an operation mode of a target switching block to a operation mode that is different from an operation mode of a first switching block while the first switching block is handling a switching process, the target switching block being one switching block selected from second switching blocks; performing a switchover process including starting the switching process using the target switching block instead of the first switching block, after completion of setting the operation mode of the target switching block; and copying the switching information held by the first switching block to the target switching block, prior to starting the switching process using the target switching block, after completion of setting the operation mode of the target switching block.
    Type: Application
    Filed: June 24, 2013
    Publication date: January 2, 2014
    Applicant: ALAXALA Networks Corporation
    Inventors: Masayuki SHINOHARA, Nobuhito MATSUYAMA, Takayuki MURANAKA, Isao KIMURA, Shinichi AKAHANE
  • Patent number: 8483051
    Abstract: The network relay apparatus is provided. The network relay apparatus includes: multiple ports, each being provided to send and receive a frame to and from one of multiple external devices; and a frame processor configured to perform flooding, in order to relay a received frame that is received via one of the multiple ports as a receiving port, with a preset flooding target according to an attribute of a transmit port that sends the received frame.
    Type: Grant
    Filed: June 29, 2010
    Date of Patent: July 9, 2013
    Assignee: Alaxala Networks Corporation
    Inventors: Shinichi Akahane, Yasuhiro Kodama, Takao Nara