Patents by Inventor Janani C. Sriram

Janani C. Sriram 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).

  • Path progression matching for indoor positioning systems
    Patent number: 8565783
    Abstract: A path progression matching system and method that uses path progression to find a current position of a mobile device in an indoor environment and a path history to find the path of the mobile device to get to the current position. Embodiments of the system and method use path history information, constraints, and optimization measures such as the use of received signal strength indicator (RSSI) weighted correlation coefficients. Embodiments of the system and method include a unified probabilistic model that uses path history and allows multiple constraints to be applied simultaneously. Embodiments of the system and method also include a path progression module having a first-stage progression module, which finds a starting location for the path progression matching, a second-stage module, which begins building a path history, and a third-stage progression module, which uses the path history to find the current position and path.
    Type: Grant
    Filed: November 24, 2010
    Date of Patent: October 22, 2013
    Assignee: Microsoft Corporation
    Inventors: Zongxiang Yang, Henry Frick, John Charles Curlander, William B. Gail, Sharad Agarwal, Janani C. Sriram
  • PATH PROGRESSION MATCHING FOR INDOOR POSITIONING SYSTEMS
    Publication number: 20120129546
    Abstract: A path progression matching system and method that uses path progression to find a current position of a mobile device in an indoor environment and a path history to find the path of the mobile device to get to the current position. Embodiments of the system and method use path history information, constraints, and optimization measures such as the use of received signal strength indicator (RSSI) weighted correlation coefficients. Embodiments of the system and method include a unified probabilistic model that uses path history and allows multiple constraints to be applied simultaneously. Embodiments of the system and method also include a path progression module having a first-stage progression module, which finds a starting location for the path progression matching, a second-stage module, which begins building a path history, and a third-stage progression module, which uses the path history to find the current position and path.
    Type: Application
    Filed: November 24, 2010
    Publication date: May 24, 2012
    Applicant: Microsoft Corporation
    Inventors: Zongxiang Yang, Henry Frick, John Charles Curlander, William B. Gail, Sharad Agarwal, Janani C. Sriram