Patents by Inventor Marisa Freidhof

Marisa Freidhof 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).

  • Monitoring network performance and detecting network faults using round trip transmission times
    Patent number: 9015362
    Abstract: A computer program product is provided for performing a method including: receiving transmission data over a selected time interval for each of a plurality of communication paths; calculating an average round-trip transmission time for each of the plurality of communication paths over the time interval; comparing an average round-trip transmission time for a communication path having the highest average round-trip transmission time to a threshold value and to a multiple of an average round-trip transmission time for a communication path having the lowest average round-trip transmission time; and determining, based on a result of comparing the highest round-trip transmission time to the threshold value and to a multiple of the lowest round-trip transmission time, whether the time period indicates a delay in communication between the I/O subsystem and the control unit requiring at least one of a monitoring action and a recovery action.
    Type: Grant
    Filed: July 16, 2010
    Date of Patent: April 21, 2015
    Assignee: International Business Machines Corporation
    Inventors: Scott M. Carlson, Marisa Freidhof, Geoffrey E. Miller, Dale F. Riedy, Harry M. Yudenfriend
  • Monitoring network performance and detecting network faults using round trip transmission times
    Patent number: 8972622
    Abstract: A method of processing communications includes: receiving transmission data over a selected time interval for each of a plurality of communication paths between a host processor and a control unit configured to control at least one I/O device; calculating an average round-trip transmission time for each of the communication paths over the time interval; comparing an average round-trip transmission time for a communication path having the highest average round-trip transmission time to a threshold value and to a multiple of an average round-trip transmission time for a communication path having the lowest average round-trip transmission time; and determining, based on comparing the highest round-trip transmission time to the threshold value and to a multiple of the lowest round-trip transmission time, whether the time period indicates a delay in communication between the I/O subsystem and the control unit requiring at least one of a monitoring action and a recovery action.
    Type: Grant
    Filed: May 1, 2012
    Date of Patent: March 3, 2015
    Assignee: International Business Machines Corporation
    Inventors: Scott M. Carlson, Marisa Freidhof, Geoffrey E. Miller, Dale F. Riedy, Harry M. Yudenfriend
  • MONITORING NETWORK PERFORMANCE AND DETECTING NETWORK FAULTS USING ROUND TRIP TRANSMISSION TIMES
    Publication number: 20120221748
    Abstract: A method of processing communications includes: receiving transmission data over a selected time interval for each of a plurality of communication paths between a host processor and a control unit configured to control at least one I/O device; calculating an average round-trip transmission time for each of the communication paths over the time interval; comparing an average round-trip transmission time for a communication path having the highest average round-trip transmission time to a threshold value and to a multiple of an average round-trip transmission time for a communication path having the lowest average round-trip transmission time; and determining, based on comparing the highest round-trip transmission time to the threshold value and to a multiple of the lowest round-trip transmission time, whether the time period indicates a delay in communication between the I/O subsystem and the control unit requiring at least one of a monitoring action and a recovery action.
    Type: Application
    Filed: May 1, 2012
    Publication date: August 30, 2012
    Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Scott M. Carlson, Marisa Freidhof, Geoffrey E. Miller, Dale F. Riedy, Harry M. Yudenfriend
  • MONITORING NETWORK PERFORMANCE AND DETECTING NETWORK FAULTS USING ROUND TRIP TRANSMISSION TIMES
    Publication number: 20120017121
    Abstract: A computer program product is provided for performing a method including: receiving transmission data over a selected time interval for each of a plurality of communication paths; calculating an average round-trip transmission time for each of the plurality of communication paths over the time interval; comparing an average round-trip transmission time for a communication path having the highest average round-trip transmission time to a threshold value and to a multiple of an average round-trip transmission time for a communication path having the lowest average round-trip transmission time; and determining, based on a result of comparing the highest round-trip transmission time to the threshold value and to a multiple of the lowest round-trip transmission time, whether the time period indicates a delay in communication between the I/O subsystem and the control unit requiring at least one of a monitoring action and a recovery action.
    Type: Application
    Filed: July 16, 2010
    Publication date: January 19, 2012
    Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Scott M. Carlson, Marisa Freidhof, Geoffrey E. Miller, Dale F. Riedy, Harry M. Yudenfriend