Patents Assigned to Toshiba America Research, Inc.
  • Patent number: 8631104
    Abstract: A system and method are provided by which a wireless network service provider is able to provide and maintain a high level of quality of service for terminals in the corresponding network, by overcoming problems that result in a diminished quality of service, including handoff delays as terminals move between cells in a network and the uncertainly as to which cell the individual terminals are moving to as they roam within the network. Providing and maintaining a high level of quality of service in a wireless network includes recording a history of movements of a terminal within the wireless network, analyzing the movements of the terminal within the wireless network to compute a probability distribution of the terminal's target location, and allocating network resources, including bandwidth and priority scheme, to the terminal based on the probability distribution for the terminal.
    Type: Grant
    Filed: September 6, 2001
    Date of Patent: January 14, 2014
    Assignees: Toshiba America Research, Inc., Telcordia Technologies Inc.
    Inventors: Prathima Agrawal, Shinichi Baba, Faramak Vakil
  • Publication number: 20140010174
    Abstract: Methods for coordinating power usage and link adaptation in wireless communications are described. Terminals and/or access points (APs) may attempt to modify terminals' transmit power in relation to a desired communication data transfer rate. Link adoption may also be used in conjunction with the described methods.
    Type: Application
    Filed: May 22, 2013
    Publication date: January 9, 2014
    Applicants: Telcordia Technologies Inc., Toshiba America Research, Inc.
    Inventors: Ryoko MATSUO, Shuichi OBAYASHI, Toshikazu KODAMA, David Famolari
  • Patent number: 8589578
    Abstract: The preferred embodiments provide a system and/or method that exploits the presence of multiple interfaces to provide high quality video streaming (or real time streaming). The proposed solution includes three specific strategies 1) receiver buffer management, 2) selective re-transmission of packets and 3) dynamic load balancing across interfaces to achieve high quality video streaming across multiple interfaces.
    Type: Grant
    Filed: June 29, 2008
    Date of Patent: November 19, 2013
    Assignees: Toshiba America Research, Inc., Telcordia Technologies, Inc.
    Inventors: Praveen Gopalakrishnan, Kyriakos Manousakis, Eric Van Den Berg, David Famolari
  • Patent number: 8583923
    Abstract: This document describes an EAP method used for extending EAP functionality. The extended functionality includes channel binding and re-authentication. The EAP method also allows sequencing of multiple EAP methods inside it.
    Type: Grant
    Filed: October 4, 2007
    Date of Patent: November 12, 2013
    Assignees: Toshiba America Research, Inc., Telcordia Technologies, Inc.
    Inventors: Yoshihiro Oba, Subir Das
  • Patent number: 8565185
    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: Grant
    Filed: March 9, 2006
    Date of Patent: October 22, 2013
    Assignees: Toshiba America Research, Inc., Telcordia Technologies, Inc., Kabushiki Kaisha Toshiba
    Inventor: Yoshihiro Oba
  • Patent number: 8554915
    Abstract: A network element or server that manages name, address and identifying information of network devices that contain at least one Bluetooth interface is described. A Bluetooth Device Address may be queried by a first network device of a second network device to the server and the server may provide additional name, address and identifying information on the queried second network device to the first network device such that the first network device may establish a preferred connection with the second network device.
    Type: Grant
    Filed: May 15, 2002
    Date of Patent: October 8, 2013
    Assignees: Telcordia Technologies Inc., Toshiba America Research, Inc.
    Inventors: David Famolari, Nobuyasu Nakajima
  • Patent number: 8554237
    Abstract: The present application discloses, inter alia, a system for improving the aggregate throughput of a wireless local area network which includes: at least one access point that is equipped with at least one transceiver configured to simultaneously transmit and receive at multiple frequencies using multiple channels; and the access point being configured to acquire channel conditions of users and to pool sets of users on the channels based on the channel conditions.
    Type: Grant
    Filed: December 4, 2009
    Date of Patent: October 8, 2013
    Assignees: Toshiba America Research, Inc., Telcordia Technologies, Inc.
    Inventors: Kamesh Medepalli, David Famolari, Praveen Gopalakrishnan, Toshikazu Kodama, Ryoko Matsuo, Shunichi Obayashi, Faramak Vakil
  • Patent number: 8514808
    Abstract: A media-independent handover (MIH) environment supports a MIH function that uses a mapping table to communicate with other MIH functions using a MIH transport protocol. The MIH function updates the mapping table upon receipt of a message having fields to invoke an operation. The operation can update an existing mapping or delete a mapping. The operation also can update a lifetime value for a mapping for a particular address. The mapping table includes mappings. A mapping includes a MIH function identifier, a list of transport addresses, and a lifetime value.
    Type: Grant
    Filed: October 27, 2008
    Date of Patent: August 20, 2013
    Assignees: Toshiba America Research, Inc., Telcordia Technologies, Inc.
    Inventors: Yuu-Heng Alice Cheng, Yoshihiro Ohba
  • Patent number: 8463308
    Abstract: Methods for coordinating power usage and link adaptation in wireless communications are described. Terminals and/or access points (APs) may attempt to modify terminals' transmit power in relation to a desired communication data transfer rate. Link adoption may also be used in conjunction with the described methods.
    Type: Grant
    Filed: October 20, 2004
    Date of Patent: June 11, 2013
    Assignees: Toshiba America Research, Inc., Telcordia Technologies, Inc.
    Inventors: Ryoko Matsuo, Shuichi Obayashi, Toshikazu Kodama, David Famolari
  • Patent number: 8446875
    Abstract: This document describes a proactive mechanism to provide fast-handover involving PMIPv6. In particular, it describes how one can achieve fast handoff for PMIPv6 using Media-independent Pre-Authentication (MPA) technique. It discusses the need for a fast-handoff for PMIPv6 environment. It then describes how MPA techniques could be used during different steps involving both intra-domain and inter-domain handoff for PMIPv6. MPA-based fast-handover takes advantage of the pre-authentication mechanism so that the mobile can perform the access authentication while in the previous local mobility (PMA) domain and thus would be able to complete many of the handoff related operations while still in the previous network.
    Type: Grant
    Filed: January 11, 2008
    Date of Patent: May 21, 2013
    Assignees: Toshiba America Research, Inc., Telcordia Technologies, Inc.
    Inventors: Kenichi Taniuchi, Ashutosh Dutta, Victor Fajardo, Yoshihiro Oba
  • Patent number: 8401594
    Abstract: A system and method for maximizing the standby time of mobile communication devices that have WiFi or other high energy-consuming network interfaces, by predicting in real time actionable silent periods (ASPs) of the interface and shutting the interface down during these ASPs. Standby times are significantly increased, resulting in longer periods of operation before battery charging is required, while keeping minimal the probabilities of missing incoming data packets when the interface is turned off.
    Type: Grant
    Filed: May 4, 2009
    Date of Patent: March 19, 2013
    Assignees: Toshiba America Research, Inc., Telcordia Technologies, Inc.
    Inventors: Tao Zhang, Sunil Madhani, Provin Gurung, Eric Van Den Berg
  • Patent number: 8391281
    Abstract: A network-on-chip router which includes an input buffer, an input controller connected to said input buffer, an arbiter connected to said input controller, a crossbar connected to said arbiter and said input buffer, and an output buffer connected to said crossbar. The network-on-chip router minimizes propagation time of data through the router by ensuring that the propagation delay of data through an input buffer is less than the combined propagation delay of data through an input controller and arbiter.
    Type: Grant
    Filed: March 31, 2010
    Date of Patent: March 5, 2013
    Assignee: Toshiba America Research, Inc.
    Inventor: Bipul C. Paul
  • Patent number: 8385937
    Abstract: A system and method for equalizing traffic between antenna beams is described. Aspects of the system and method may vary the beam widths to attempt to equalize traffic based on non-real-time communications and/or non-real-time communications.
    Type: Grant
    Filed: July 7, 2004
    Date of Patent: February 26, 2013
    Assignees: Toshiba America Research Inc., Telcordia Inc.
    Inventors: Faramak Vakil, David Famolari, Kamesh Medepalli, Prathima Agrawal, Toshikazu Kodama, Shuichi Obayashi, Ryoko Matsuo
  • Patent number: 8332923
    Abstract: A media-independent handover key management architecture is disclosed that uses Kerberos for secure key distribution among a server, an authenticator, and a mobile node. In the preferred embodiments, signaling for key distribution is based on re-keying and is decoupled from re-authentication that requires EAP (Extensible Authentication Protocol) and AAA (Authentication, Authorization and Accounting) signaling similar to initial network access authentication. In this framework, the mobile node is able to obtain master session keys required for dynamically establishing the security associations with a set of authenticators without communicating with them before handover. By separating re-key operation from re-authentication, the proposed architecture is more optimized for a proactive mode of operation. It can also be optimized for reactive mode of operation by reversing the key distribution roles between the mobile node and the target access node.
    Type: Grant
    Filed: January 10, 2008
    Date of Patent: December 11, 2012
    Assignees: Toshiba America Research, Inc., Telcordia Technologies, Inc.
    Inventors: Yoshihiro Oba, Subir Das
  • Publication number: 20120287904
    Abstract: Systems and methods are described for secure and seamless roaming between internal and external networks. Double and triple tunnels may be used to connect a mobile node to a correspondent host. A mobile node may include the ability to connect to two networks simultaneously to enable seamless roaming between networks.
    Type: Application
    Filed: July 20, 2012
    Publication date: November 15, 2012
    Applicants: TELCORDIA INC., TOSHIBA AMERICA RESEARCH, INC.
    Inventors: Kenichi TANIUCHI, Tao ZHANG, Prathima AGRAWAL, Ashutosh DUTTA, Sunil MADHANI, Shinichi BABA, Kensaku FUJIMOTO, Yasuhiro KATSUBE, Toshikazu KODAMA, Yoshihiro OHBA
  • Patent number: 8306026
    Abstract: A system and method of managing multicast key distribution that includes associating a multicast address with each internal node of the key tree, wherein the key tree is created based on the last hop topology.
    Type: Grant
    Filed: September 18, 2006
    Date of Patent: November 6, 2012
    Assignees: Toshiba America Research, Inc., Telcordia Technologies, Inc.
    Inventors: Farooq Anjum, Abhrajit Ghosh
  • Patent number: 8270948
    Abstract: A method for avoiding loss of data or consumption of resources between a mobile node and an new access network in which an authentication agent performs authentication with an authentication client of the mobile node to effect access to an enforcement point of said access network, said method comprising informing an authentication client of said mobile node that an authentication agent has completed an installation process with the enforcement point.
    Type: Grant
    Filed: January 18, 2007
    Date of Patent: September 18, 2012
    Assignees: Toshiba America Research, Inc., Telcordia Technologies, Inc.
    Inventors: Yoshihiro Oba, Rafael Marin Lopez
  • Patent number: 8259682
    Abstract: This application describes, among other things, a framework of Media-independent Pre-Authentication (MPA), a new handover optimization mechanism that has a potential to address issues on existing mobility management protocols and mobility optimization mechanisms. MPA is a mobile-assisted, secure handover optimization scheme that works over any link-layer and with any mobility management protocol. This application also shows, among other things, an initial implementation of MPA in our testbed and some performance results to show how existing protocols could be leveraged to realize the functionalities of MPA.
    Type: Grant
    Filed: October 8, 2010
    Date of Patent: September 4, 2012
    Assignees: Toshiba America Research, Inc., Telcordia Technologies, Inc.
    Inventors: Ashutosh Dutta, Yoshihiro Oba, Kenichi Taniuchi
  • Patent number: 8243687
    Abstract: Systems and methods are described for secure and seamless roaming between internal and external networks. Double and triple tunnels may be used to connect a mobile node to a correspondent host. A mobile node may include the ability to connect to two networks simultaneously to enable seamless roaming between networks.
    Type: Grant
    Filed: June 21, 2011
    Date of Patent: August 14, 2012
    Assignees: Toshiba America Research, Inc., Telcordia, Inc.
    Inventors: Kenichi Taniuchi, Tao Zhang, Prathima Agrawal, Ashutosh Dutta, Sunil Madhani, Shinichi Baba, Kensaku Fujimoto, Yasuhiro Katsube, Toshikazu Kodama, Yoshihiro Ohba
  • Patent number: 8239671
    Abstract: This document describes a channel binding mechanism based on parameter binding in the key derivation procedure. The method cryptographically binds access network parameters to a key without need to carry those parameters in EAP methods.
    Type: Grant
    Filed: April 20, 2006
    Date of Patent: August 7, 2012
    Assignees: Toshiba America Research, Inc., Telcordia Technologies, Inc.
    Inventor: Yoshihiro Oba