Patents by Inventor Yousuf Hasan

Yousuf Hasan 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).

  • Backup path convergence in the APS environment
    Patent number: 8040795
    Abstract: A SONET network terminated by routers includes working paths and backup paths. The routers pre-establishes in their link state data bases the links in both for both the working and backup paths. However, the links involved in the backup paths are given higher costs, then the links working paths, that the routers select only the links in the working path. If there is a failure in a link in a working path, an APS arrangement provides rapid switchover of the optical links so as to substitute one or more links in the corresponding backup path. This is accomplished by changing the relative costs of the working and backup links involved, so that the routers select the backup links for their routing tables.
    Type: Grant
    Filed: May 10, 2006
    Date of Patent: October 18, 2011
    Assignee: Cisco Technology, Inc.
    Inventors: Sina Mirtorabi, Mukhtiar Shaikh, Abhay Kumar Roy, Yousuf Hasan
  • Backup path convergence in the APS environment
    Publication number: 20070263532
    Abstract: A SONET network terminated by routers includes working paths and backup paths. The routers pre-establishes in their link state data bases the links in both for both the working and backup paths. However, the links involved in the backup paths are given higher costs, then the links working paths, that the routers select only the links in the working path. If there is a failure in a link in a working path, an APS arrangement provides rapid switchover of the optical links so as to substitute one or more links in the corresponding backup path. This is accomplished by changing the relative costs of the working and backup links involved, so that the routers select the backup links for their routing tables.
    Type: Application
    Filed: May 10, 2006
    Publication date: November 15, 2007
    Inventors: Sina Mirtorabi, Mukhtiar Shaikh, Abhay Roy, Yousuf Hasan