Patents by Inventor Hidetoshi Yokota

Hidetoshi Yokota 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: 9440500
    Abstract: A pneumatic tire in which a cavity resonance sound is reduced while punctures are easily repaired with a puncture sealant. The pneumatic tire has a fibrous region where short fibers are bonded onto an inner surface of the tire. A circumferential fiberless region where short fibers are not bonded onto the inner surface of the tire extends circumferentially between both ends of a tread ground contact area.
    Type: Grant
    Filed: January 23, 2014
    Date of Patent: September 13, 2016
    Assignee: BRIDGESTONE CORPORATION
    Inventors: Toshiyuki Watanabe, Yoshiyuki Waki, Taiga Ishihara, Hidetoshi Yokota, Seiji Ishikawa, Kento Hirohata, Akio Kusano
  • Patent number: 9094412
    Abstract: A self-organizing IP multimedia subsystem exhibiting node splitting and node merging functions wherein any node within the self organizing IP multimedia subsystem may assume any role thereby providing node balancing and fault tolerance to an overall network.
    Type: Grant
    Filed: April 30, 2010
    Date of Patent: July 28, 2015
    Assignee: Telecordia Technologies, Inc.
    Inventors: Ashutosh Dutta, Dana Chee, Christian Makaya, Subir Das, Fuchun Joseph Lin, Ming Lai, Tsunehiko Chiba, Satoshi Komorita, Hidetoshi Yokota
  • Patent number: 9025771
    Abstract: A mechanism by which handoff delay can be minimized while not compromising the IMS/MMD security and also protecting the media if required by certain applications is presented. Methods for mitigating delay during SA re-association and mitigating the IPSec tunnel overhead for signaling and media at the Mobile Node are given. In one embodiment, SA keys can be transferred from the old P-CSCF to new P-CSCF, enabling the establishment of SAs before Mobile Node physically moves to the new subnet in a network. Proactive handover is used. In another embodiment, SA keys are transferred from S-CSCF to new P-CSCF. In this case, the SA keys are transferred to the new P-CSCF by S-CSCF through a context transfer mechanism well in advance so that SAs may be established before Mobile Node physically moves to new subnet. In another embodiment, methods for mitigating IPSec tunnel overhead are presented.
    Type: Grant
    Filed: September 11, 2007
    Date of Patent: May 5, 2015
    Assignee: Telcordia Technologies, Inc.
    Inventors: Ashutosh Dutta, Abhrajit Ghosh, Subir Das, Fuchun Joesph Lin, Kyriakos Manousakis, Dana Chee, Tsunehiko Chiba, Hidetoshi Yokota, Akira Idoue
  • Patent number: 8971291
    Abstract: A mechanism by which handoff delay can be minimized while not compromising the IMS/MMD security and also protecting the media if required by certain applications is presented. One proactive method includes proactive authentication. Another proactive method includes proactive security association, such as transferring SA keys from old proxy to new proxy, or transferring keys through serving signal entities. Reactive methods include transferring SA keys from old proxy to new proxy, using either push or pull technology. Other reactive methods include transferring keys through serving signal entities using either push or pull technology.
    Type: Grant
    Filed: December 12, 2011
    Date of Patent: March 3, 2015
    Assignees: Telcordia Technologies, Inc., KDDI Corporation
    Inventors: Ashutosh Dutta, Abhrajit Ghosh, Subir Das, Dana Chee, Kyriakos Manousakis, Funchun Joseph Lin, Shih-wei Li, Tsunehiko Chiba, Hidetoshi Yokota, Akira Idoue
  • Publication number: 20140224400
    Abstract: A pneumatic tire in which a cavity resonance sound is reduced while punctures are easily repaired with a puncture sealant. The pneumatic tire has a fibrous region where short fibers are bonded onto an inner surface of the tire. A circumferential fiberless region where short fibers are not bonded onto the inner surface of the tire extends circumferentially between both ends of a tread ground contact area.
    Type: Application
    Filed: January 23, 2014
    Publication date: August 14, 2014
    Applicant: BRIDGESTONE CORPORATION
    Inventors: Toshiyuki WATANABE, Yoshiyuki WAKI, Taiga ISHIHARA, Hidetoshi YOKOTA, Seiji ISHIKAWA, Kento HIROHATA, Akio KUSANO
  • Publication number: 20140166179
    Abstract: A pneumatic tire with short fibers fixed to the inner surface of the tire with improved peel resistance, and a method of producing such a pneumatic tire. The pneumatic tire has a carcass toroidally extending from a tread portion along a pair of sidewall portions to a pair of bead portions, and bead fillers provided radially outwardly of bead cores embedded in the bead portions, including flocking areas in which many short fibers are fixed to at least part of an inner surface of the pneumatic tire with an adhesive. The flocking areas are positioned such that their tire radial direction inner ends are positioned inwardly in the tire radial direction as compared to the tire radial direction outer ends of the bead fillers and are spaced a given distance outward in the tire radial direction apart from bead toes.
    Type: Application
    Filed: December 18, 2013
    Publication date: June 19, 2014
    Applicant: BRIDGESTONE CORPORATION
    Inventors: Toshiyuki WATANABE, Yoshiyuki WAKI, Taiga ISHIHARA, Hidetoshi YOKOTA, Seiji ISHIKAWA, Ietomo MATSUNAGA, Akio KUSANO, Hiroshi TAKADA, Akane MIYOSHI
  • Patent number: 8670407
    Abstract: A system and method for route optimization in PMIP having a first mobile node having a local mobility anchor and anchored at an access router and a second mobile node anchored at an access router is presented. The method includes establishing a binding cache at one access router comprising a mapping of mobile node addresses to access router addresses, populating the binding cache, and updating the mapping of the mobile node addresses in response to a handoff of a mobile node from one access router to another access router, so that a packet is transmitted from the first mobile node to the second mobile node using the mapping in the binding cache. The second access router address is obtained by either transmitting the packet from the first mobile node to the local mobility anchor, or querying neighboring access routers, or broadcasting access router addresses from the local mobility anchor.
    Type: Grant
    Filed: January 30, 2008
    Date of Patent: March 11, 2014
    Assignees: Telcordia Technologies, Inc., KDDI Corporation
    Inventors: Ashutosh Dutta, Funchun Joe Lin, Subir Das, Dana Chee, Hidetoshi Yokota, Tsunehiko Chiba
  • Patent number: 8625551
    Abstract: A system and method for mobility support of a mobile node having a home network in a heterogeneous roaming environment is presented. The method comprises the steps of authenticating the mobile node in a visited network and obtaining an address for the mobile node in the visited network, establishing a security connection between a functional component in the visited network and an agent in the home network, creating a home address for the mobile node, and using the home address to generate a SIP signaling address, a SIP media address, and a non-SIP media address, such that SIP non-media is transmitted using the security connection to the SIP signaling address, SIP media is transmitted using the security connection to the SIP media address, and non-SIP media is transmitted using the security connection to the non-SIP media address.
    Type: Grant
    Filed: December 21, 2007
    Date of Patent: January 7, 2014
    Assignees: Telcordia Technologies, Inc., KDDI Corporation
    Inventors: Ashutosh Dutta, Subir Das, Fuchun Joe Lin, Dana Chee, Tsumehiko Chiba, Hidetoshi Yokota, Akira Idoue
  • Patent number: 8565186
    Abstract: The present invention advantageously provides several systems and methods for solving the trombone routing issues within an IMS/MMD network. These approaches avoid trombone routing, speed up handoff, and increase the efficiency of signaling and overall performance of an IMS/MMD network. These solutions can broadly be divided into the following categories. Piggy-backing SIP registration over MIP (Split at FA); Selective Reverse Tunneling and Tunneling between FA and P-CSCF; the SIP-based mobility protocol; use of CoA during SIP registration and call up in MIPv6; Piggy-backing SIP registration when HA and S-CSCF Co-exist; Using Dynamic Home Agents in MIPv4 FA-CoA; and the Interceptor-Caching Approach.
    Type: Grant
    Filed: August 31, 2007
    Date of Patent: October 22, 2013
    Assignees: Telcordia Technologies, Inc., KDDI Corporation
    Inventors: Ashutosh Dutta, Abhrajit Ghosh, John Lee, Subir Das, Joe Lin, Kyriakos Manousakis, Tsunehiko Chiba, Hidetoshi Yokota, Akira Idoue
  • Publication number: 20120239727
    Abstract: An overlay service network and method for delivering a multimedia service. The overlay service network comprises a user interface for subscribers to request an available service as a requested service, a register server for registering and storing a database of available services, a plurality of service nodes for executing at least one available service and a controller for receiving a request for an available service, searching the register server for the requested service, selecting one or more of the plurality of service nodes to execute the requested service and establishing a chaining sequence between a node requesting the service, the one or more selected execution nodes and a destination node to execute the requested service.
    Type: Application
    Filed: March 16, 2011
    Publication date: September 20, 2012
    Applicants: KDDI CORPORATION, TELCORDIA TECHNOLOGIES, INC.
    Inventors: Ashutosh Dutta, Christian Makaya, Dana Chee, Fuchun Joseph Lin, Satoshi Komorita, Tsunehiko Chiba, Hidetoshi Yokota, Benjamin Falchuk, Manabu Ito
  • Publication number: 20120221700
    Abstract: A virtualized telecom system and a method for managing service continuity and mobility in a virtualized telecom system. The system comprises a plurality of execution nodes each configured to execute a network function by registering; and a manager node for registering each of the plurality of execution nodes, assigning a node identifier (Node ID) to each of the plurality of execution nodes, periodically polling each of the plurality of execution nodes for a status, and issuing control instructions to each of the plurality of execution nodes based upon the status of a respective execution node. Each of the plurality of execution node responds to the polling by transmitting its status to the manager node. The status includes runtime information and pre-configuration information.
    Type: Application
    Filed: August 26, 2011
    Publication date: August 30, 2012
    Applicants: KDDI CORPORATION, TELCORDIA TECHNOLOGIES, INC.
    Inventors: Ashutosh Dutta, Christian Makaya, Dana Chee, Subir Das, Benjamin Falchuk, Surendran Alathurai, Fuchun Joseph Lin, Satoshi Komorita, Tsunehiko Chiba, Hidetoshi Yokota, Manabu Ito
  • Publication number: 20120082136
    Abstract: A mechanism by which handoff delay can be minimized while not compromising the IMS/MMD security and also protecting the media if required by certain applications is presented. One proactive method includes proactive authentication. Another proactive method includes proactive security association, such as transferring SA keys from old proxy to new proxy, or transferring keys through serving signal entities. Reactive methods include transferring SA keys from old proxy to new proxy, using either push or pull technology. Other reactive methods include transferring keys through serving signal entities using either push or pull technology.
    Type: Application
    Filed: December 12, 2011
    Publication date: April 5, 2012
    Applicants: KDDI CORPORATION, TELCORDIA TECHNOLOGIES, INC.
    Inventors: Ashutosh Dutta, Abhrajit Ghosh, Subir Das, Dana Chee, Kyriakos Manousakis, Funchun Joseph Lin, Shih-wei Li, Tsunehiko Chiba, Hidetoshi Yokota, Akira Idoue
  • Publication number: 20120042084
    Abstract: A method and system for setting up and maintaining an IMS session. The method comprising transmitting an invite message from a registered user equipment, forwarding the invite message to a selected SIP proxy (P-CSCF), forwarding the invite message to a specified SIP server (S-CSCF) and relaying said invite message to a destination. The invite message contains a header and a payload. The header includes an identifier for the load balancing node. The load balancing node is assigned to the user equipment. There are at least two load balancing node, a primary and a secondary load balancing node. The identifier for the load balancing node does not change even if there is a failure of one of a primary load balancing node, the P-CSCFs or S-CSCFs. During registration, the routing information for the load balancing node is added into both via and record-route headers in a SIP registration request.
    Type: Application
    Filed: February 9, 2011
    Publication date: February 16, 2012
    Applicants: KDDI CORPORATION, TELCORDIA TECHNOLOGIES, INC.
    Inventors: Ashutosh Dutta, Christian Makaya, Dana Chee, Subir Das, Fuchun Joseph Lin, Satoshi Kemorita, Tsunehiko Chiba, Hidetoshi Yokota
  • Patent number: 8098627
    Abstract: A mechanism by which handoff delay can be minimized while not compromising the IMS/MMD security and also protecting the media if required by certain applications is presented. One proactive method includes proactive authentication. Another proactive method includes proactive security association, such as transferring SA keys from old proxy to new proxy, or transferring keys through serving signal entities. Reactive methods include transferring SA keys from old proxy to new proxy, using either push or pull technology. Other reactive methods include transferring keys through serving signal entities using either push or pull technology.
    Type: Grant
    Filed: September 11, 2007
    Date of Patent: January 17, 2012
    Assignees: Telcordia Technologies, Inc., KDDI Corporation
    Inventors: Ashutosh Dutta, Abhrajit Ghosh, Subir Das, Dana Chee, Kyriakos Manousakis, Funchun Joseph Lin, Shih-wei Li, Tsunehiko Chiba, Hidetoshi Yokota, Akira Idoue
  • Publication number: 20110110223
    Abstract: A self-organizing IP multimedia subsystem exhibiting node splitting and node merging functions wherein any node within the self organizing IP multimedia subsystem may assume any role thereby providing node balancing and fault tolerance to an overall network.
    Type: Application
    Filed: April 30, 2010
    Publication date: May 12, 2011
    Applicants: Telcordia Technologies, Inc., KDDI Corporation
    Inventors: Ashutosh Dutta, Dana Chee, Christian Makaya, Subir Das, Fuchun Joseph Lin, Ming Lai, Tsunehiko Chiba, Satoshi Komorita, Hidetoshi Yokota
  • Publication number: 20100217980
    Abstract: In order to reduce the registration time of a Mobile IP/Simple IP and an SIP, an AAA (14) which receives a Mobile IP registration request message from a mobile node (10), authorizes the mobile node and generates the authentication information regarding the authentication, a FA (12) which transmits the authentication information to the mobile node (10), and an S-CSCF (17) which receives an SIP registration request message to which the authentication information is attached from the mobile node (10), checks the received authentication information and transmits an SIP registration completion message addressed to the mobile node are provided.
    Type: Application
    Filed: December 28, 2007
    Publication date: August 26, 2010
    Applicant: KDDI CORPORATION
    Inventors: Satoshi Komorita, Tsunehiko Chiba, Hidetoshi Yokota
  • Patent number: 7756091
    Abstract: A gateway (GW) and a plurality of foreign agents (FA) are connected in a ring-like manner, and the procedures of (1) the GW receiving an IP packet, addressed from a corresponding node CN to a mobile node MNa; (2) the GW transferring the packet to a link L1 in one direction; (3) an FA1 transferring the received packet to a link L2 in the same direction; (4) FA1 furthermore transferring the received packet to a link L4, connected to MNa, if the destination address of the received packet is already registered in the visitor list; (5) an FA2 transferring the received packet to a link L3 in the same direction; (6) FA2 furthermore ending the process as it is if the destination address of the received packet is not registered; and (7) the GW discarding the received packet.
    Type: Grant
    Filed: March 17, 2004
    Date of Patent: July 13, 2010
    Assignee: National Institute of Information and Communications Technology, Incorporated Administrative Agency
    Inventors: Hidetoshi Yokota, Takeshi Kubo, Akira Idoue, Masugi Inoue, Mikio Hasegawa, Homare Murakami, Khaled Mahmud
  • Patent number: 7746891
    Abstract: A mobile IPv6 dual-stack node engages in IPv6 communication while roaming within an IPv4-only network, for example using ISATAP. First, the node determines that it has moved Bnd obtains a new IPv4 address. After determining that the visited network contains no IPv6-enabled components, the node uses an IPv6 connect agent to engage in IPv6 communication. The node configures its care-of address using the IPv6 connect agent's routing information and the node's newly-obtained IPv4 address. In one embodiment, the node and the connect agent optimize the handoff when the nodes has moved but still uses the same connect agent. The node sends a binding updates to the connect agents comprising the node's old care-of address and the node's new care-of address. When the connect agent receives a packet destined for the node's previous care-of address, it forwards the packet to the node's currents care-of address, thereby reducing packet loss.
    Type: Grant
    Filed: April 5, 2004
    Date of Patent: June 29, 2010
    Assignee: KDDI Corporation
    Inventors: Shu Yamamoto, Carl Williams, Hidetoshi Yokota, Kazuo Hashimoto
  • Patent number: 7577119
    Abstract: A data communication method and apparatus for a mobile network. A destination foreign agent (FA2) recognizes a MAC address of an MN. The FA2 registers the MAC address of the MN in a handoff request message (FHReq), and the FA2 feeds the FHReq onto a transfer network. Each of foreign agents (FAs) receives the FHReq, registers an IP address corresponding to the MAC address in the FHReq when the MAC address is registered in a binding list of the FAs themselves, and feeds the IP address onto the transfer network. The FA2 receives the FHReq, and temporarily registers the MAC address and the IP address in the binding list of the FA2 itself. The FA2 transfers data sent from a homw agent (HA) to the MN, based on the information which has been temporarily registered.
    Type: Grant
    Filed: March 4, 2005
    Date of Patent: August 18, 2009
    Assignees: KDDI Corporation, National Institute of Information and Communications Technology, Incorporated Administrative Agency
    Inventors: Hidetoshi Yokota, Takeshi Kubo, Akira Idoue, Masugi Inoue, Khaled Mahmud
  • Publication number: 20080285518
    Abstract: A system and method for route optimization in PMIP having a first mobile node having a local mobility anchor and anchored at an access router and a second mobile node anchored at an access router is presented. The method includes establishing a binding cache at one access router comprising a mapping of mobile node addresses to access router addresses, populating the binding cache, and updating the mapping of the mobile node addresses in response to a handoff of a mobile node from one access router to another access router, so that a packet is transmitted from the first mobile node to the second mobile node using the mapping in the binding cache. The second access router address is obtained by either transmitting the packet from the first mobile node to the local mobility anchor, or querying neighboring access routers, or broadcasting access router addresses from the local mobility anchor.
    Type: Application
    Filed: January 30, 2008
    Publication date: November 20, 2008
    Inventors: Ashutosh Dutta, Funchun Joe Lin, Subir Das, Dana Chee, Hidetoshi Yokota