Patents by Inventor Leonard Ciavattone
Leonard Ciavattone 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: 9705767Abstract: The present disclosure is directed to systems and methods for detecting and measuring network route reconvergence using in-band data probes. The probes are generated and inserted into the network. The probes are routed to an insertion point, corresponding to a beginning of a measurement line, via an in-band connection such as a virtual private network. The in-band connection is configured such that the time-to-live field of the probes is not affected by network path changes occurring in the in-band connection. The probes are routed through the measurement line to measure network route reconvergence. The measurement line is configured to affect the time-to-live field of the probes to reflect network path changes occurring along the measurement line. The probes are extracted from an extraction point corresponding to an end of the measurement line and routed back to the measurement device for analysis.Type: GrantFiled: September 9, 2015Date of Patent: July 11, 2017Assignee: AT&T Intellectual Property I, L.P.Inventor: Leonard Ciavattone
-
Publication number: 20150381446Abstract: The present disclosure is directed to systems and methods for detecting and measuring network route reconvergence using in-band data probes. The probes are generated and inserted into the network. The probes are routed to an insertion point, corresponding to a beginning of a measurement line, via an in-band connection such as a virtual private network. The in-band connection is configured such that the time-to-live field of the probes is not affected by network path changes occurring in the in-band connection. The probes are routed through the measurement line to measure network route reconvergence. The measurement line is configured to affect the time-to-live field of the probes to reflect network path changes occurring along the measurement line. The probes are extracted from an extraction point corresponding to an end of the measurement line and routed back to the measurement device for analysis.Type: ApplicationFiled: September 9, 2015Publication date: December 31, 2015Applicant: AT&T INTELLECTUAL PROPERTY I, L.P.Inventor: Leonard Ciavattone
-
Patent number: 9137128Abstract: The present disclosure is directed to systems and methods for detecting and measuring network route reconvergence using in-band data probes. The probes are generated and inserted into the network. The probes are routed to an insertion point, corresponding to a beginning of a measurement line, via an in-band connection such as a virtual private network. The in-band connection is configured such that the time-to-live field of the probes is not affected by network path changes occurring in the in-band connection. The probes are routed through the measurement line to measure network route reconvergence. The measurement line is configured to affect the time-to-live field of the probes to reflect network path changes occurring along the measurement line. The probes are extracted from an extraction point corresponding to an end of the measurement line and routed back to the measurement device for analysis.Type: GrantFiled: December 8, 2010Date of Patent: September 15, 2015Assignee: AT&T Intellectual Property I, L.P.Inventor: Leonard Ciavattone
-
Patent number: 8976689Abstract: Network performance management includes identifying a location of a test unit, providing a test protocol to the test unit over a network, and transmitting a stream of data packets to the test unit. The network performance management also includes identifying, via the location of the test unit, a transmission path of network elements through which the stream of packets flows. The network performance management further includes tracking measurements associated with the stream of data packets transmitted to the test unit and return data packets received from the test unit. The measurements are tracked for segments associated with each of the network elements in the transmission path.Type: GrantFiled: August 23, 2011Date of Patent: March 10, 2015Assignee: AT&T Intellectual Property I, L.P.Inventors: Leonard Ciavattone, William R. Halloran, Alfred C. Morton, Jr., Gomathi Ramachandran
-
Patent number: 8929382Abstract: A method, device, and program for determining states in a flow of packets are provided. A flow of transmitted packets is received. When the difference between the sequence number of the arriving packet and the next expected sequence number is equal to zero and when the TTL number of the arriving packet is equal to the TTL number of the previous packet, there is a stable state beginning with the first of the consecutively received packets. If a difference between the sequence number of an arriving packet and a next expected sequence number is greater than 1, or TTL of the arriving packet is not equal to the TTL number of the previous packet, there is a not stable state. Time between end of one stable state and start of the next stable state is the hole, and the states and holes correlate to events for analysis of the network.Type: GrantFiled: September 14, 2012Date of Patent: January 6, 2015Assignee: AT&T Intellectual Property I, L.P.Inventors: Gomathi Ramachandran, Leonard A. Ciavattone, Alfred C. Morton, Jr.
-
Publication number: 20130051252Abstract: Network performance management includes identifying a location of a test unit, providing a test protocol to the test unit over a network, and transmitting a stream of data packets to the test unit. The network performance management also includes identifying, via the location of the test unit, a transmission path of network elements through which the stream of packets flows. The network performance management further includes tracking measurements associated with the stream of data packets transmitted to the test unit and return data packets received from the test unit. The measurements are tracked for segments associated with each of the network elements in the transmission path.Type: ApplicationFiled: August 23, 2011Publication date: February 28, 2013Applicant: AT&T INTELLECTUAL PROPERTY I, L.P.Inventors: Leonard Ciavattone, William R. Halloran, Alfred C. Morton, JR., Gomathi Ramachandran
-
Publication number: 20130010608Abstract: A method, device, and program for determining states in a flow of packets are provided. A flow of transmitted packets is received. When the difference between the sequence number of the arriving packet and the next expected sequence number is equal to zero and when the TTL number of the arriving packet is equal to the TTL number of the previous packet, there is a stable state beginning with the first of the consecutively received packets. If a difference between the sequence number of an arriving packet and a next expected sequence number is greater than 1, or TTL of the arriving packet is not equal to the TTL number of the previous packet, there is a not stable state. Time between end of one stable state and start of the next stable state is the hole, and the states and holes correlate to events for analysis of the network.Type: ApplicationFiled: September 14, 2012Publication date: January 10, 2013Applicant: AT&T INTELLECTUAL PROPERTY I, L.P.Inventors: Gomathi Ramachandran, Leonard A. Ciavattone, Alfred C. Morton, JR.
-
Patent number: 8284778Abstract: A method, device, and program for determining states in a flow of packets are provided. A flow of transmitted packets is received. When the difference between the sequence number of the arriving packet and the next expected sequence number is equal to zero and when the TTL number of the arriving packet is equal to the TTL number of the previous packet, there is a stable state beginning with the first of the consecutively received packets. If a difference between the sequence number of an arriving packet and a next expected sequence number is greater than 1, or TTL of the arriving packet is not equal to the TTL number of the previous packet, there is a not stable state. Time between end of one stable state and start of the next stable state is the hole, and the states and holes correlate to events for analysis of the network.Type: GrantFiled: November 19, 2009Date of Patent: October 9, 2012Assignee: AT&T Intellectual Property I, L.P.Inventors: Gomathi Ramachandran, Leonard A. Ciavattone, Alfred C. Morton, Jr.
-
Publication number: 20120151032Abstract: The present disclosure is directed to systems and methods for detecting and measuring network route reconvergence using in-band data probes. The probes are generated and inserted into the network. The probes are routed to an insertion point, corresponding to a beginning of a measurement line, via an in-band connection such as a virtual private network. The in-band connection is configured such that the time-to-live field of the probes is not affected by network path changes occurring in the in-band connection. The probes are routed through the measurement line to measure network route reconvergence. The measurement line is configured to affect the time-to-live field of the probes to reflect network path changes occurring along the measurement line. The probes are extracted from an extraction point corresponding to an end of the measurement line and routed back to the measurement device for analysis.Type: ApplicationFiled: December 8, 2010Publication date: June 14, 2012Inventor: Leonard Ciavattone
-
Patent number: 7969905Abstract: This is a method for use in detecting and measuring microcongestion on links where QoS is utilized to provide a prioritized packet delivery service. Microcongestion is a transient condition that occurs over extremely short periods of time and is generally invisible to the end user. However, the ability to monitor the frequency and severity of microcongestion can help identify link capacity issues with far greater accuracy than standard passive measurements and at a much earlier stage than traditional active measurements. This capability can be particularly valuable on very-high-speed links where even small periods of perceptible congestion can represent a significant number of queued packets.Type: GrantFiled: December 15, 2009Date of Patent: June 28, 2011Assignee: AT&T Intellectual Property II, L.P.Inventor: Leonard Ciavattone
-
Publication number: 20110116390Abstract: A method, device, and program for determining states in a flow of packets are provided. A flow of transmitted packets is received. When the difference between the sequence number of the arriving packet and the next expected sequence number is equal to zero and when the TTL number of the arriving packet is equal to the TTL number of the previous packet, there is a stable state beginning with the first of the consecutively received packets. If a difference between the sequence number of an arriving packet and a next expected sequence number is greater than 1, or TTL of the arriving packet is not equal to the TTL number of the previous packet, there is a not stable state. Time between end of one stable state and start of the next stable state is the hole, and the states and holes correlate to events for analysis of the network.Type: ApplicationFiled: November 19, 2009Publication date: May 19, 2011Applicant: AT&T INTELLECTUAL PROPERTY I, L.P.Inventors: Gomathi Ramachandran, Leonard A. Ciavattone, Alfred C. Morton, JR.
-
Patent number: 7656796Abstract: This is a method for use in detecting and measuring microcongestion on links where QoS is utilized to provide a prioritized packet delivery service. Microcongestion is a transient condition that occurs over extremely short periods of time and is generally invisible to the end user. However, the ability to monitor the frequency and severity of microcongestion can help identify link capacity issues with far greater accuracy than standard passive measurements and at a much earlier stage than traditional active measurements. This capability can be particularly valuable on very-high-speed links where even small periods of perceptible congestion can represent a significant number of queued packets.Type: GrantFiled: September 8, 2006Date of Patent: February 2, 2010Assignee: AT&T Corp.Inventor: Leonard Ciavattone