Patents by Inventor Ashok Kumar Agrawala

Ashok Kumar Agrawala 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: 7224984
    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: Grant
    Filed: August 15, 2001
    Date of Patent: May 29, 2007
    Assignee: University of Maryland, College Park
    Inventors: Ashok Kumar Agrawala, Ronald L Larsen, A. Udaya Shankar, Douglas C Szajda