Patents by Inventor Udaya Shankar

Udaya Shankar 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: 20050020275
    Abstract: An asset positioning method and system (700) rapidly and accurately determine the special location of wireless nodes distributed in three-dimensional space. Furthermore, as a by-product, every node also determines the relative offset and drift of every other node's clock, so that it is possible for all nodes to carry out a precise synchronized action (708). The positioning and synchronization protocol has significant implications for a broad range of wireless networking infrastructure and applications. For instance, the rapid availability of accurate location information greatly simplifies and optimises the implementation of ad-hoc networks and sensor-based applications (716). Additionally, the synchronized node operations facilitate the development of new applications, such as phase-locked arrays, in which several low power transmitters coordinate to form a powerful group transmitter.
    Type: Application
    Filed: August 15, 2001
    Publication date: January 27, 2005
    Inventors: Ashok Agrawala, Ronald Larsen, A. Udaya Shankar, Douglas Szajda
  • Patent number: 6768733
    Abstract: Communicating voice over a packet-switching network is implemented on a telecommunications network that includes the packet-switching network, two coding units coupled to the packet-switching network and to an originating node and a terminating node, respectively, and at least one signaling apparatus. The first of the two coding units is configured to extract signaling data associated with the voice call and transmit the signaling data and its network address to the signaling apparatus. Signaling data for establishing the voice call is received by the signaling apparatus, and a network address of the coding unit in the packet-switching network is obtained. The second coding unit is controlled to establish a bearer channel with the first coding unit for carrying the voice data through the packet-switching network, based on the network address.
    Type: Grant
    Filed: April 8, 2003
    Date of Patent: July 27, 2004
    Assignee: Cisco Technology, Inc.
    Inventors: Udaya Shankar, Andrew West, Douglas Shriver, Fred R. Rednor, David Auerbach, David Hughes
  • Patent number: 6570869
    Abstract: Communicating voice over a packet-switching network is implemented on a telecommunications network that includes the packet-switching network, two coding units coupled to the packet-switching network and to an originating node and a terminating node, respectively, and at least one signaling apparatus. The first of the two coding units is configured to extract signaling data associated with the voice call and transmit the signaling data and its network address to the signaling apparatus. Signaling data for establishing the voice call is received by the signaling apparatus, and a network address of the first coding unit in the packet-switching network is obtained. The second coding unit is controlled to establish a bearer channel with the first coding unit for carrying the voice data through the packet-switching network, based on the network address.
    Type: Grant
    Filed: September 30, 1998
    Date of Patent: May 27, 2003
    Assignee: Cisco Technology, Inc.
    Inventors: Udaya Shankar, Andrew West, Douglas Shriver, Fred R. Rednor, David Auerbach, David Hughes
  • Patent number: 6224990
    Abstract: The application of polypropylene carbonate in solution to valve metal powders having relatively high surface area, then evaporating the solvent under static (non-agitating) conditions. The static drying of the coated valve metal powder produces a semi-solid cake which may be converted into a free-flowing powder via screening. Valve metal powders so-coated with polypropylene carbonate are particularly well-suited for the fabrication of powder metallurgy anode bodies used for the manufacture of electrolytic capacitors.
    Type: Grant
    Filed: September 23, 1999
    Date of Patent: May 1, 2001
    Assignee: Kemet Electronics Corporation
    Inventors: Randolph S. Hahn, Peter James Fernstrom, Udaya Shankar Bhimaraja, Brian J. Melody