Patents by Inventor Yoshimichi Tanizawa

Yoshimichi Tanizawa 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: 8286224
    Abstract: When an authentication identifier is contained in a first message required for receiving authentication with respect to IEEE 802.1x from a terminal device, the authentication is assumed to be successful and then a data link is established with the terminal device, and a filtering unit is set so as to pass a first packet which should be passed for receiving authentication with respect to a higher layer protocol from among packets sent from the terminal device through the data link and to block a second packet different from the first packet. If a second message required for receiving authentication with respect to the higher layer protocol from the terminal device is received through the filtering unit, the authentication with respect to the higher layer protocol is performed. When the authentication is successful, the filtering unit is set so as to pass the second packet.
    Type: Grant
    Filed: August 8, 2008
    Date of Patent: October 9, 2012
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Naoki Esaka, Yoshimichi Tanizawa
  • Publication number: 20120242461
    Abstract: According to an embodiment, a communication apparatus controls controllable nodes. The apparatus includes an acquisition unit and a generation unit. The acquisition unit acquires at least one of a first evaluation value indicating an occurrence frequency of a control request to a target controllable node and a second evaluation value indicating an occurrence frequency of communication error at the target controllable node. The generation unit generates identification information to be assigned to control the target controllable node in a manner such that a bit length of the identification information becomes shorter as at least one of the first evaluation value and the second evaluation value increases.
    Type: Application
    Filed: March 23, 2012
    Publication date: September 27, 2012
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Yoshimichi TANIZAWA, Kotaro ISE, Eiji KAMAGATA, Tsuyoshi KOGAWA, Takeshi ISHIHARA, Yuichiro OYAMA, Takaomi MURAKAMI
  • Publication number: 20120246269
    Abstract: According to an embodiment, a data processing apparatus includes an acquiring unit configured to acquire structural information indicating a structure of data; a download control unit configured to download one or more partial data pieces among a plurality of partial data pieces obtained by separating the data on the basis of the structural information, using a separation position of the data as a download start position; a selection receiving unit configured to receive a selection of the separation position of the data; and an output unit configured to output the data from the selected separation position received by the selection receiving unit.
    Type: Application
    Filed: March 23, 2012
    Publication date: September 27, 2012
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Takeshi ISHIHARA, Yoshimichi Tanizawa, Kotaro Ise
  • Publication number: 20120076139
    Abstract: According to one embodiment, a node is capable of conforming to one of a plurality of Ethernet standards and includes: an Ethernet controller unit that performs auto-negotiation with a switch to exchange information concerning an interface speed, to determine an interface speed to be used based on the information concerning the interface speed, and to receive information including a setting Ethernet standard set as an Ethernet standard to be used; a storage unit that stores a node's available Ethernet standard which is an Ethernet standard to which the node can conform; and a controller that performs setting such that the node operates using a coincident standard between the Ethernet standard stored in the storage unit and setting Ethernet standard and connects a link to the switch.
    Type: Application
    Filed: September 14, 2011
    Publication date: March 29, 2012
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventor: Yoshimichi TANIZAWA
  • Publication number: 20120079302
    Abstract: According to an embodiment, a communication device includes a wake-up signal reception unit configured to receive a wake-up signal to request a change of a state from a second state to a first state, the second state requiring less power consumption than the first state; and a state control unit configured to change the state from the second state to the first state and inform a control unit of the change of the state when the wake-up signal is received, the control unit being configured to process a frame received during the first state.
    Type: Application
    Filed: March 22, 2011
    Publication date: March 29, 2012
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Kotaro Ise, Yoshimichi Tanizawa, Takeshi Ishihara, Masataka Goto, Eiji Kamagata
  • Publication number: 20120079297
    Abstract: According to one embodiment, a communication device includes a start-up signal reception unit that receives a start-up signal that a start node transmits for starting up a node to be started; a first interface connected to Ethernet; a second interface connected to Ethernet; a power reception unit that receives PoE power through the first interface; a PoE controller that receives the start-up signal and PoE power and gives a transmission instruction of a start-up power signal which is a PoE power signal having a signal pattern corresponding to the start-up signal; and a power transmission unit that receives the transmission instruction from the PoE controller and transmits the start-up power signal through the second interface.
    Type: Application
    Filed: September 13, 2011
    Publication date: March 29, 2012
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Yoshimichi Tanizawa, Takeshi Ishihara, Kotaro Ise, Eiji Kamagata, Yuichiro Oyama, Takaomi Murakami
  • Patent number: 8140844
    Abstract: A presence table stores therein presence information. A storage unit stores therein in associated manner a terminal identifier unique each of a plurality of terminals and an encryption key to be used for multicast communication within a multicast group. A receiving unit receives a subscription request message from a first terminal from among the terminals. The subscription message includes the terminal identifier of the first terminal, and a request requesting subscription to the presence information present in the storage unit. An acquiring unit acquires the encryption key from the storage unit by using the terminal identifier of the first terminal. A transmitting unit transmits acquired encryption key to the first terminal.
    Type: Grant
    Filed: February 13, 2007
    Date of Patent: March 20, 2012
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Yoshimichi Tanizawa, Naoki Esaka, Tsutomu Shibata
  • Patent number: 8136144
    Abstract: An authenticating unit authenticates an external terminal and stores the result of authentication in an authentication state table. A receiving unit receives a first message containing information relating to a first application and identification information unique to the external terminal. A determining unit determines whether the external terminal contained in the first message is authentic by referring to the information in the authentication state table, each time the first message is received. A generating unit generates a second message containing a port, which is to be used by the first application, and an address of the external terminal when the external terminal is determined to be authentic. A transmitting unit transmits the second message to a firewall.
    Type: Grant
    Filed: January 9, 2007
    Date of Patent: March 13, 2012
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Yoshimichi Tanizawa, Naoki Esaka
  • Patent number: 7984159
    Abstract: The resource controlling unit controls a resource usage state. The receiving unit receives from a first terminal a first message containing a first condition for maintaining a connection that is used to transfer a message exchanged between the first terminal and the second terminal. Based on the first condition contained in the received first message and the resource usage state, the determining unit determines a second condition that is to be accepted for maintaining the connection. The adding unit adds the second condition to the first message. The transmitting unit transmits the first message to which the second condition is added to an external device or the second terminal. The maintaining unit maintains the connection under the second condition.
    Type: Grant
    Filed: August 3, 2007
    Date of Patent: July 19, 2011
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Yoshimichi Tanizawa, Naoki Esaka, Tsutomu Shibata
  • Publication number: 20100125892
    Abstract: A switching apparatus includes an authentication client unit that requests user authentication to a user authentication server that performs user authentication of the switching apparatus, and, when the requested user authentication is successfully performed, receives from the user authentication server, information of success of the user authentication and setting information used when terminal authentication of a terminal to be connected to the switching apparatus is relayed to a terminal authentication server that performs terminal authentication; an authentication setting unit that sets the setting information to an authentication relay unit that relays terminal authentication; and a control unit that allows the authentication relay unit to relay the terminal authentication when the setting information is set to the authentication relay unit.
    Type: Application
    Filed: August 26, 2009
    Publication date: May 20, 2010
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventor: Yoshimichi Tanizawa
  • Publication number: 20090300197
    Abstract: According to one embodiment, there is provided an Internet Protocol communication system provided with terminal devices configured to mutually communicate with one another via an IP network and a server unit which performs digest authentication in response to authentication requests transmitted from the terminal device. The server unit comprises an authentication processing module which transmits challenge values to terminal devices of authentication request sources, and verifies response values returned to the challenge values, and a determination module which determines results of the digest authentication on the basis of the results of the verification. At least one of the terminal devices comprises an authentication client module which generates the response values by using a defined algorithm in accordance with user passwords input by users, and with device passwords stored in advance, and returns the response values to the server unit.
    Type: Application
    Filed: May 26, 2009
    Publication date: December 3, 2009
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Yoshimichi Tanizawa, Tsutomu Shibata, Naoki Esaka
  • Publication number: 20090238172
    Abstract: A transfer unit transfers a message between a network and an external terminal. An input unit inputs a user ID for identifying a user. A generating unit generates a registration message requesting a registration of address information of the user. A transmitting unit transmits the registration message to a server. A receiving unit receives a response message including registration information and connection information from the server. When the connection information indicates a permission of a connection of the external terminal to the network, a control unit controls the transfer unit to transfer the message between the network and the external terminal.
    Type: Application
    Filed: February 4, 2009
    Publication date: September 24, 2009
    Inventors: Yoshimichi TANIZAWA, Naoki Esaka, Tsutomu Shibata
  • Publication number: 20090238350
    Abstract: A receiving unit receives state information including operational state of an IP phone terminal, user ID, and destination ID, and stores it in a state storage unit. An obtaining unit obtains state information including a user ID included in received state information from the state storage unit. A determining unit determines an order for selecting a second destination ID as a relay destination of a communication for a first destination ID based on the operational state. A generating unit generates order information indicating a selection of the second destination ID in a determined order. A notifying unit notifies the order information to a server device.
    Type: Application
    Filed: March 13, 2009
    Publication date: September 24, 2009
    Inventors: Naoki ESAKA, Yoshimichi Tanizawa
  • Publication number: 20090116474
    Abstract: The transferring unit transfers a message received from a PC or a network to a designated destination address. The judging unit judges whether an authentication message including the identification information of the user and a grant message indicating that the user is authenticated are transferred. The identification information acquiring unit acquires the identification information from the transferred authentication message. The SIP message processing unit creates a registration message that includes the address information of the user having the acquired identification information and transmits the created registration message to the SIP server when the grant message is transferred.
    Type: Application
    Filed: September 2, 2008
    Publication date: May 7, 2009
    Inventors: Yoshimichi TANIZAWA, Naoki ESAKA, Tsutomo SHIBATA
  • Publication number: 20090109963
    Abstract: The storage unit stores therein authentication IDs that are used for authentication of users and address information in association with one another. The authentication processing unit receives from a PC an authentication message that includes an authentication ID and is used for the authentication of the user of a communication terminal, and performs authentication on the user based on the received authentication message. The SIP address acquiring unit acquires from the storage unit address information that corresponds to the authentication ID included in the authentication message when the user is authenticated. The SIP address registering unit sends the SIP location server a registration request for registering the acquired address information as the address information of the user of the IP telephone terminal associated with the PC that transmits the authentication message.
    Type: Application
    Filed: September 2, 2008
    Publication date: April 30, 2009
    Inventors: Yoshimichi Tanizawa, Naoki Esaka, Tsutomu Shibata
  • Publication number: 20090064281
    Abstract: When an authentication identifier is contained in a first message required for receiving authentication with respect to IEEE 802.1X from a terminal device, the authentication is assumed to be successful and then a data link is established with the terminal device, and a filtering unit is set so as to pass a first packet which should be passed for receiving authentication with respect to a higher layer protocol from among packets sent from the terminal device through the data link and to block a second packet different from the first packet. If a second message required for receiving authentication with respect to the higher layer protocol from the terminal device is received through the filtering unit, the authentication with respect to the higher layer protocol is performed. When the authentication is successful, the filtering unit is set so as to pass the second packet.
    Type: Application
    Filed: August 8, 2008
    Publication date: March 5, 2009
    Inventors: Naoki Esaka, Yoshimichi Tanizawa
  • Publication number: 20090025079
    Abstract: A switching equipment stores identification information of communication established with respect to an infrastructure network system in a storage unit, and when an access request is received from a terminal device, the switching equipment adds the stored identification information to the access request and transfers the access request to a 1× Radius server. When the terminal device having requested the access is authenticated, the 1× Radius server notifies a PANA PAA of address information of the terminal device associated with the identification information added to the access request. The PANA PAA approves the same network access as the switching equipment with respect to the terminal device in the received address information.
    Type: Application
    Filed: May 29, 2008
    Publication date: January 22, 2009
    Inventors: Yoshimichi Tanizawa, Naoki Esaka, Tsutomu Shibata
  • Publication number: 20090016339
    Abstract: A call-forwarding destination judging unit included in an SIP proxy estimates whether call forwarding will be required, based on the type of an SIP message. When it has been estimated that call forwarding will be required, the call-forwarding destination judging unit also estimates the destination of the call forwarding. With this arrangement, when the delivery of the SIP message requires call forwarding, it is possible to establish, in advance, a TLS connection with the SIP terminal being the destination of the call forwarding. Thus, it is possible to eliminate the need to establish the TLS connection at the time when the call is actually forwarded.
    Type: Application
    Filed: March 6, 2008
    Publication date: January 15, 2009
    Inventors: Yoshimichi Tanizawa, Naoki Esaka, Tsutomu Shibata
  • Patent number: 7443983
    Abstract: A communication apparatus which is connected to networks including first network of first security level which is lowest security level and second network of second security level, and is wirelessly connected to terminal receiving terminal identifier and password which designates one of networks, from terminal, selecting one of first security level and second security level based on an authentication result of terminal, terminal identifier, and password, forwarding, when second security level is selected, data item which is transmitted from terminal and is encrypted using cryptographic algorithm and cryptographic key to second network, and forwarding, to terminal, data item which is transmitted from second network and addressed to terminal, and forwarding, when first security level is selected, data item transmitted from terminal to first network, and forwarding, to terminal, data item which is transmitted from first network and addressed to terminal.
    Type: Grant
    Filed: October 27, 2004
    Date of Patent: October 28, 2008
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Yoshimichi Tanizawa, Masataka Goto, Yoshihiko Kashio, Masahiro Takagi, Naohisa Shibuya
  • Publication number: 20080235381
    Abstract: A storage unit of a relaying apparatus stores first identification information that identifies an SIP terminal and second identification that identifies other SIP terminal which is forecast as a transfer destination of a message. A transmitting-and-receiving unit receives from the SIP terminal a request message that is received before a transfer message to be transferred to other SIP terminal and that includes a processing request concerning communications and the first identification information. An obtaining unit obtains from a storage unit the second identification information corresponding to the first identification information included in the received request message. A connection establishing unit establishes communications between the other SIP terminal of the obtained second identification information and the relaying apparatus.
    Type: Application
    Filed: November 14, 2007
    Publication date: September 25, 2008
    Inventors: Yoshimichi TANIZAWA, Naoki Esaka, Tsutomu Shibata