Patents by Inventor Narayanan S. Ramabhadran

Narayanan S. Ramabhadran 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).

  • Method and system for efficiently matching events with subscribers in a content-based publish-subscribe system
    Patent number: 6839730
    Abstract: A method is provided for efficiently solving the matching problem in content-based publish-subscribe systems. Subscribers may define arbitrary boolean predicates as conditions to subscribe to the published event. The subscribers and their predicates can be organized in the form of a virtual Direct Acyclic Graph (DAG) such that a traversal of the DAG yields one or more matching subscribers. The present invention improves upon the conventional method of linearly matching individual subscribers against an event.
    Type: Grant
    Filed: July 14, 2000
    Date of Patent: January 4, 2005
    Assignee: Novell, Inc.
    Inventor: Narayanan S. Ramabhadran