Patents by Inventor Yoshihiro Oba

Yoshihiro Oba 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: 20070136412
    Abstract: In some of the preferred embodiments, methods for converting XML data to TLV format are provided for use in, e.g., query and/or response in, e.g., network discovery and the like applications.
    Type: Application
    Filed: July 27, 2006
    Publication date: June 14, 2007
    Inventors: Yoshihiro Oba, Kenichi Taniuchi, Subir Das
  • Publication number: 20070047491
    Abstract: The preferred embodiments herein relate to methods and systems for controlling a handoff decision related to switch back of a mobile node between a first network and a second network in a media independent pre-authentication framework and/or to methods and systems for mitigating effects of undesired switch back of a mobile node between a first network and a second network in a media independent pre-authentication framework.
    Type: Application
    Filed: April 14, 2006
    Publication date: March 1, 2007
    Inventors: Ashutosh Dutta, Victor Fajardo, Yoshihiro Oba, Kenichi Taniuchi
  • Publication number: 20070008926
    Abstract: According to some of the preferred embodiments, a method for proactively establishing a security association between a mobile node in a visiting network and an authentication agent in another network to which the mobile node can move includes: negotiating pre-authentication using a flag in a message header that indicates whether the communication is for establishing a pre-authentication security association; and one of the mobile node and the authentication agent initiating pre-authentication by transmitting a message with the flag set in its message header, and the other of the mobile node and the authentication agent responding with the flag set in its message header only if it supports the pre-authentication.
    Type: Application
    Filed: March 9, 2006
    Publication date: January 11, 2007
    Applicants: TOSHIBA AMERICAN RESEARCH, INC., TELCORDIA TECHNOLOGIES, INC.
    Inventor: Yoshihiro Oba
  • Patent number: 7046647
    Abstract: In some illustrative embodiments, a novel system and method is provided that can, for example, extend concepts of pre-authentication (such as, e.g., IEEE 802.11i pre-authentication) so as to operate across networks or subnetworks (such as, e.g., IP subnets). In preferred embodiments, a novel architecture includes one or both of two new mechanisms that substantially improve, e.g., higher-layer handoff performance. A first mechanism is referred to as “pre-configuration,” which allows a mobile to pre-configure higher-layer information effective in candidate IP subnets to handoff. A second mechanism is referred to as “virtual soft-handoff,” which allows a mobile to send or receive packets through the candidate IP subnets even before it is actually perform a handoff to any of the candidate IP subnets.
    Type: Grant
    Filed: January 22, 2004
    Date of Patent: May 16, 2006
    Assignee: Toshiba America Research, Inc.
    Inventors: Yoshihiro Oba, Shinichi Baba
  • Publication number: 20060041742
    Abstract: A system and method is disclosed for dynamically and securely establishing a tunnel for a mobile device. In the preferred embodiments, the system and method operate to dynamically assign one or more tunnel endpoint addresses to a client which is not on the same IP-link as an authentication agent depending on an authentication result based on using an authentication protocol source port number in order to address communications.
    Type: Application
    Filed: August 15, 2005
    Publication date: February 23, 2006
    Applicant: TOSHIBA AMERICA RESEARCH, INC.
    Inventor: Yoshihiro OBA
  • Publication number: 20060036733
    Abstract: According to some embodiments, systems and methods for binding dynamic host configuration and network access authentication are provided related to, inter alia, interactions between a PAA (PANA Authentication Agent) and a DHCP (Dynamic Host Configuration Protocol) server, such as, e.g., for synchronization between the PANA SA state and the DHCP SA state, such as, e.g., maintaining synchronization when a connection is lost. In some embodiments, systems and methods for binding network bridge and network access authentication are also provided related to, inter alia, interactions between a PAA and a layer-2 switch, such as, e.g., for avoiding service thefts and the like (such as, e.g., MAC address and/or IP address spoofing) in the context of, e.g., the above. In some other embodiments, systems and methods for bootstrapping multicast security from network access authentication protocol are also provided related to, inter alia, key management for protected IP multicast streams, such as, e.g.
    Type: Application
    Filed: October 29, 2004
    Publication date: February 16, 2006
    Applicant: Toshiba America Research, Inc.
    Inventors: Kensaku Fujimoto, Yasuhiro Katsube, Yoshihiro Oba
  • Publication number: 20050165953
    Abstract: In some illustrative embodiments, an IP-layer based network selection and multihoming method is provided that enables a flexible and secure dynamic selection of one or more serving networks for use by a client node. The method is independent of any link-layer technology. A serving network can be an ISP network, a NAP network exchange facility, a VLAN, or the like. Network information is advertised to a client node, the client node is authenticated and authorized for use of an access router, and a secure tunnel is established between the client node and the access router. The method can be implemented by using standard protocols, and can work over any existing or future link-layer technologies that are able to carry IP datagrams, without any modification.
    Type: Application
    Filed: January 22, 2004
    Publication date: July 28, 2005
    Inventors: Yoshihiro Oba, Shinichi Baba
  • Publication number: 20050163078
    Abstract: In some illustrative embodiments, a novel system and method is provided that can, for example, extend concepts of pre-authentication (such as, e.g., IEEE 802.11i pre-authentication) so as to operate across networks or subnetworks (such as, e.g., IP subnets). In preferred embodiments, a novel architecture includes one or both of two new mechanisms that substantially improve, e.g., higher-layer handoff performance. A first mechanism is referred to as “pre-configuration,” which allows a mobile to pre-configure higher-layer information effective in candidate IP subnets to handoff. A second mechanism is referred to as “virtual soft-handoff,” which allows a mobile to send or receive packets through the candidate IP subnets even before it is actually perform a handoff to any of the candidate IP subnets.
    Type: Application
    Filed: January 22, 2004
    Publication date: July 28, 2005
    Applicant: Toshiba America Research, Inc.
    Inventors: Yoshihiro Oba, Shinichi Baba
  • Publication number: 20050044243
    Abstract: A computing node accesses toll-free or at a reduced toll, a subscriber server through an access network and a global communications network, i.e., the Internet. A computing node generates a plurality of network packets including at least one packet having destination identification information. A client within the computing device receives the at least one packet and transmits the destination identification information from the at least one packet to a management server. The management server verifies the destination identification information corresponds to a registered subscriber and sends an authorization signal to the client. The client allows the plurality of network packets, which have the destination identification information corresponding to a registered subscriber server, to be transmitted to a registered subscriber server.
    Type: Application
    Filed: August 19, 2003
    Publication date: February 24, 2005
    Inventors: Raja Narayanan, Yoshihiro Oba, Shinichi Baba
  • Patent number: 6529958
    Abstract: A label switched path set up scheme which is capable of detecting a loop of the label switched path efficiently and quickly, and which can enable the switching of the label switched path even in the case where conventionally a label switch path loop would be erroneously detected at a time of the route change, without requiring a label set up retry operation from a previous hop node device of the node device that have erroneously detected the loop which would have been necessary conventionally. A label switched path set up request message is transferred up to a node that can confirm that the path does not form a loop, while each node through which the message passes stores the fact that it is in a message processing state. Then, in a process where a response message is returned from that node, the message processing state of each node on the route of the path is released sequentially, and this releasing establishes the path set up.
    Type: Grant
    Filed: July 16, 1999
    Date of Patent: March 4, 2003
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Yoshihiro Oba, Yasuhiro Katsube
  • Patent number: 6262986
    Abstract: A packet scheduling scheme capable of realizing a fair scheduling regardless of weights of connections. A packet scheduler has a plurality of packet queues for temporarily storing entered packets, to each of which a weight is set up; a packet input unit for entering packets into the packet queues; a scheduling information management unit for managing scheduling information for specifying an order to read out packets stored in the packet queues, according to a queue length of each packet queue and the weight set up for each packet queue; and a packet output unit for reading out and outputting desired packets from the packet queues according to the scheduling information.
    Type: Grant
    Filed: July 8, 1996
    Date of Patent: July 17, 2001
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Yoshihiro Oba, Tsuguhiro Hirose
  • Patent number: 5270096
    Abstract: A biaxially oriented polyester film for magnetic recording media improved in slipperiness, shaving resistance and scratch resistance by protrusions formed on the film surface, namely, a polyester film for magnetic recording media wherein the film is a biaxially oriented polyester film which contains (I) heat resistant high molecular particles having an average particle size of 0.3 to 1.5 .mu.m in 0.001 to 0.5% by weight of the polyester, and(II) alumina particles having an independent existence rate of 80% or more and an average particle size of 0.06 to 0.2 .mu.m in 0.05 to 1.0% by weight of the polyester and/or colloidal silica particles having an independent existence rate of 80% or more and an average particle size of 0.3 .mu.m or less in 0.05 to 2.0% by weight of the polyester;wherein the distribution curve, in the range where the height (x : .mu.m) is 0.05 .mu.m or more and the number of the protrusions (y : per mm.sup.2) is 30 protrusions/mm.sup.
    Type: Grant
    Filed: April 18, 1991
    Date of Patent: December 14, 1993
    Assignee: Teijin Limited
    Inventors: Sumio Kato, Yoshihiro Oba, Hirofumi Murooka, Nobuo Minobe, Hideo Katoh