Patents by Inventor Zihui Ge

Zihui Ge 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: 8984116
    Abstract: A technique for monitoring performance in a network uses passively monitored traffic data at the server access routers. The technique aggregates performance metrics into clusters according to a spatial hierarchy in the network, and then aggregates performance metrics within spatial clusters to form time series of temporal bins. Representative values from the temporal bins are then analyzed using an enhanced Holt-Winters exponential smoothing algorithm.
    Type: Grant
    Filed: April 23, 2013
    Date of Patent: March 17, 2015
    Assignee: AT&T Intellectual Property I, L.P.
    Inventors: Zihui Ge, Ashley Flavel, Alexandre Gerber, Dan Pei, Hiren Shah, He Yan, Jennifer Yates
  • Patent number: 8934352
    Abstract: Methods, apparatus and articles of manufacture for hierarchical anomaly localization and prioritization are disclosed. An example method disclosed herein comprises obtaining reported status for a plurality of nodes of a hierarchical topology, the reported status for a particular node being at least one of normal, abnormal or indeterminate, and determining a subset of root cause abnormal nodes, a root cause abnormal node included in the subset of root cause abnormal nodes having a total number of abnormal direct descendent nodes and indeterminate direct descendent nodes that is greater than a number of normal direct descendent nodes of the root cause abnormal node.
    Type: Grant
    Filed: August 30, 2011
    Date of Patent: January 13, 2015
    Assignee: AT&T Intellectual Property I, L.P.
    Inventors: Dan Pei, Ashley Flavel, Zihui Ge, Alexandre Gerber, Hiren Shah, He Yan
  • Patent number: 8839278
    Abstract: Systems and methods to model user activity information associated with a network system are provided. A particular method includes receiving, at a computing device, a request for user activity information associated with selected channels of a television access network that provides multimedia content to users. The method includes executing a model of user activity associated with the television access network at the computing device. The model estimates the user activity information as user multimedia access demands during particular time periods within a day. The method also includes storing the user activity information at a computer-readable non-transitory storage medium.
    Type: Grant
    Filed: June 9, 2010
    Date of Patent: September 16, 2014
    Assignee: AT&T Intellectual Property I, L.P.
    Inventors: Jia Wang, Zihui Ge, Seungjoon Lee, Tongqing Qiu, Jun Xu, Qi Zhao
  • Patent number: 8826314
    Abstract: A system that incorporates teachings of the present disclosure may include, for example, obtaining regression coefficients that quantify a relationship between premises feedback and first network and premises performance indicators, obtaining second network performance indicators for the network elements, obtaining second premises performance indicators for the customer premises equipment, and predicting customer complaints by applying the obtained regression coefficients to at least the second network performance indicators and the second premises performance indicators. Other embodiments are disclosed.
    Type: Grant
    Filed: January 30, 2012
    Date of Patent: September 2, 2014
    Assignees: AT&T Intellectual Property I, LP, Board of Regents, The University of Texas Systems
    Inventors: Jia Wang, Andrea Basso, Min-Hsuan Chen, Zihui Ge, Ajay Mahimkar, Han Hee Song, Jennifer Yates, Yin Zhang
  • Patent number: 8774023
    Abstract: A system and method are provided for identifying a change point in a set of data. The system performs the method by receiving a set of data. The data indicates a plurality of performance measurements from a measurement point in a network. Each of the plurality of measurements represents a single type of performance measurement made at the measurement point at each of a corresponding plurality of points in time. The method also includes dividing the set of data into a plurality of data points in a chronological order. Each data point has a value corresponding to the performance measurements. The method also includes ranking the data points in an ascending order, calculating a cumulative sum for each of the data points, calculating a change score for the set of data points. A change point is identified in the data set if the change score exceeds a predetermined confidence level.
    Type: Grant
    Filed: September 22, 2010
    Date of Patent: July 8, 2014
    Assignee: AT&T Intellectual Property I, LP
    Inventors: Jia Wang, Zihui Ge, Ajay Mahimkar, Aman Shaikh, Jennifer Yates, Yin Zhang, Joanne Emmons
  • Publication number: 20140181968
    Abstract: Concepts and technologies disclosed herein are for monitoring operational activities in networks and detecting potential network intrusions and misuses. According to one aspect disclosed herein, an intrusion detection system can collect logs from an authentication, authorization, and accounting system. The intrusion detection system can extract information from the logs, update intrusion detection information utilized by an intrusion detection rule based upon the information extracted from the logs, update a profile utilized by the intrusion detection rule, compare the profile and the intrusion detection rule against a running state of an on-going session, tag corresponding log entries with a threat score, calculate the threat scores from the corresponding log entries to create an aggregated threat score, and present the aggregated threat score. The intrusion detection system can also present an alarm if the aggregated threat score triggers an alarm condition.
    Type: Application
    Filed: December 20, 2012
    Publication date: June 26, 2014
    Applicant: AT&T INTELLECTUAL PROPERTY I, L.P.
    Inventors: Zihui Ge, Jie Chu, Richard Huber, Ping Ji, Jennifer Yates, Yung-Chao Yu
  • Patent number: 8761029
    Abstract: Example methods, apparatus and articles of manufacture to perform root cause analysis for network events are disclosed. An example method includes retrieving a symptom event instance from a normalized set of data sources based on a symptom event definition; generating a set of diagnostic events from the normalized set of data sources which potentially cause the symptom event instance, the diagnostic events being determined based on dependency rules; and analyzing the set of diagnostic events to select a root cause event based on root cause rules.
    Type: Grant
    Filed: March 6, 2013
    Date of Patent: June 24, 2014
    Assignee: AT&T Intellectual Property I, L.P.
    Inventors: Zihui Ge, Dan Pei, Jennifer Yates, He Yan
  • Publication number: 20140059208
    Abstract: Methods, systems, and products infer performance of a domain name system. Queries to, and responses from, the domain name system are logged and categorized. Each category is associated with a different performance issue related to the domain name system.
    Type: Application
    Filed: August 26, 2012
    Publication date: February 27, 2014
    Applicant: AT&T INTELLECTUAL PROPERTY I, L.P.
    Inventors: HE YAN, ZIHUI GE, ALEXANDRE GERBER, OLIVER SPATSCHECK
  • Publication number: 20130282896
    Abstract: A technique for monitoring performance in a network uses passively monitored traffic data at the server access routers. The technique aggregates performance metrics into clusters according to a spatial hierarchy in the network, and then aggregates performance metrics within spatial clusters to form time series of temporal bins. Representative values from the temporal bins are then analyzed using an enhanced Holt-Winters exponential smoothing algorithm.
    Type: Application
    Filed: April 23, 2013
    Publication date: October 24, 2013
    Inventors: Zihui Ge, Ashley Flavel, Alexandre Gerber, Dan Pei, Hiren Shah, He Yan, Jennifer Yates
  • Publication number: 20130198767
    Abstract: A system that incorporates teachings of the present disclosure may include, for example, obtaining regression coefficients that quantify a relationship between premises feedback and first network and premises performance indicators, obtaining second network performance indicators for the network elements, obtaining second premises performance indicators for the customer premises equipment, and predicting customer complaints by applying the obtained regression coefficients to at least the second network performance indicators and the second premises performance indicators. Other embodiments are disclosed.
    Type: Application
    Filed: January 30, 2012
    Publication date: August 1, 2013
    Applicants: Board of Regents, The University of Texas System, AT&T Intellectual Property I, LP
    Inventors: Jia Wang, Andrea Basso, Min-Hsuan Chen, Zihui Ge, Ajay Mahimkar, Han Hee Song, Jennifer Yates, Yin Zhang
  • Patent number: 8452871
    Abstract: A technique for monitoring performance in a network uses passively monitored traffic data at the server access routers. The technique aggregates performance metrics into clusters according to a spatial hierarchy in the network, and then aggregates performance metrics within spatial clusters to form time series of temporal bins. Representative values from the temporal bins are then analyzed using an enhanced Holt-Winters exponential smoothing algorithm.
    Type: Grant
    Filed: August 27, 2011
    Date of Patent: May 28, 2013
    Assignee: AT&T Intellectual Property I, L.P.
    Inventors: Zihui Ge, Ashley Flavel, Alexandre Gerber, Dan Pei, Hiren Shah, He Yan, Jennifer Yates
  • Patent number: 8411577
    Abstract: Example methods, apparatus and articles of manufacture to perform root cause analysis for network events are disclosed. An example method includes retrieving a symptom event instance from a normalized set of data sources based on a symptom event definition; generating a set of diagnostic events from the normalized set of data sources which potentially cause the symptom event instance, the diagnostic events being determined based on dependency rules; and analyzing the set of diagnostic events to select a root cause event based on root cause rules.
    Type: Grant
    Filed: March 19, 2010
    Date of Patent: April 2, 2013
    Assignee: AT&T Intellectual Property I, L.P.
    Inventors: Zihui Ge, Dan Pei, Jennifer Yates, He Yan
  • Publication number: 20130054783
    Abstract: A technique for monitoring performance in a network uses passively monitored traffic data at the server access routers. The technique aggregates performance metrics into clusters according to a spatial hierarchy in the network, and then aggregates performance metrics within spatial clusters to form time series of temporal bins. Representative values from the temporal bins are then analyzed using an enhanced Holt-Winters exponential smoothing algorithm.
    Type: Application
    Filed: August 27, 2011
    Publication date: February 28, 2013
    Inventors: Zihui Ge, Ashley Flavel, Alexandre Gerber, Dan Pei, Hiren Shah, He Yan, Jennifer Yates
  • Publication number: 20130051248
    Abstract: Methods, apparatus and articles of manufacture for hierarchical anomaly localization and prioritization are disclosed. An example method disclosed herein comprises obtaining reported status for a plurality of nodes of a hierarchical topology, the reported status for a particular node being at least one of normal, abnormal or indeterminate, and determining a subset of root cause abnormal nodes, a root cause abnormal node included in the subset of root cause abnormal nodes having a total number of abnormal direct descendent nodes and indeterminate direct descendent nodes that is greater than a number of normal direct descendent nodes of the root cause abnormal node.
    Type: Application
    Filed: August 30, 2011
    Publication date: February 28, 2013
    Inventors: Dan Pei, Ashley Flavel, Zihui Ge, Alexandre Gerber, Hiren Shah, He Yan
  • Patent number: 8228803
    Abstract: Method and apparatus for determining at least one critical traffic matrix from a plurality of traffic matrices, where each of the plurality of traffic matrices is organized into at least one of a plurality of clusters, for a network is described. In one embodiment, a merging cost is calculated for each possible pair of clusters within a plurality of clusters. A pair of traffic matrices that is characterized by having the least merging cost is then merged. The calculating and the merging steps are subsequently repeated until a predefined number of clusters remains, wherein the remaining clusters are used to determine at least one critical traffic matrix.
    Type: Grant
    Filed: June 28, 2006
    Date of Patent: July 24, 2012
    Assignee: AT&T Intellectual Property II, L.P.
    Inventors: Zihui Ge, Yin Zhang
  • Patent number: 8145745
    Abstract: Method and apparatus for network-level anomaly inference in a network is described. In one example, link load measurements are obtained for multiple time intervals. Routing data for the network is obtained. Link level anomalies are extracted using temporal analysis on the link load measurements over the multiple time intervals. Network-level anomalies are inferred from the link-level anomalies.
    Type: Grant
    Filed: December 28, 2005
    Date of Patent: March 27, 2012
    Assignee: AT&T Intellectual Property II, L.P.
    Inventors: Zihui Ge, Albert Gordon Greenberg, Matthew Roughan, Yin Zhang
  • Publication number: 20120072574
    Abstract: A system and method identify a set of rules for determining a commonality of attributes across different behavior changes for a network. The system performs the method by receiving a set of data correlating network triggers to performance changes of one or more network devices. The set of data further includes an indication of a sign of the performance change for each of the network devices based on the triggers. The method further includes extracting a set of rules relating to a set of relationships between the triggers and the performance changes. The rules identify a commonality of the performance changes for multiple network devices based on the triggers.
    Type: Application
    Filed: September 22, 2010
    Publication date: March 22, 2012
    Inventors: Jia Wang, Zihui Ge, Ajay Mahimkar, Aman Shaikh, Jennifer Yates, Yin Zhang, Joanne Emmons
  • Publication number: 20120072556
    Abstract: A system and method identify a network upgrade from a data set including a plurality of configuration sessions. The system performs the method by receiving a plurality of configuration sessions. Each of the configuration sessions comprises a plurality of configuration commands. The configuration commands are generated by a same user identifier and within a time threshold. The method further includes identifying one of the configuration sessions as a network upgrade session. The identification is based on a rareness of the configuration session or a skewness of the configuration session.
    Type: Application
    Filed: September 22, 2010
    Publication date: March 22, 2012
    Inventors: Jia WANG, Zihui GE, Ajay MAHIMKAR, Aman SHAIKH, Jennifer YATES, Yin ZHANG, Joanne EMMONS
  • Publication number: 20120069747
    Abstract: A system and method are provided for identifying a change point in a set of data. The system performs the method by receiving a set of data. The data indicates a plurality of performance measurements from a measurement point in a network. Each of the plurality of measurements represents a single type of performance measurement made at the measurement point at each of a corresponding plurality of points in time. The method also includes dividing the set of data into a plurality of data points in a chronological order. Each data point has a value corresponding to the performance measurements. The method also includes ranking the data points in an ascending order, calculating a cumulative sum for each of the data points, calculating a change score for the set of data points. A change point is identified in the data set if the change score exceeds a predetermined confidence level.
    Type: Application
    Filed: September 22, 2010
    Publication date: March 22, 2012
    Inventors: Jia Wang, Zihui Ge, Ajay Mahimkar, Aman Shaikh, Yin Zhang, Joanne Emmons
  • Patent number: 8111626
    Abstract: A method and apparatus for providing event correlation in a network are disclosed. For example, the method extracts a plurality of events of interest from a database, and creates one or more event time series from the plurality of events of interest, wherein each of the one or more event time series comprises a set of events of a same type and of a same location that occur within a given time period. The method forms one or more composite events from the one or more event time series, and performs one or more pair-wise correlations for at least one of: the event time-series, or the one or more composite events. The method then identifies one or more pair-wise correlations that are statistically significant.
    Type: Grant
    Filed: December 31, 2008
    Date of Patent: February 7, 2012
    Assignee: AT&T Intellectual Property I, L.P.
    Inventors: Aman Shaikh, Cheng Ee, Ajay Mahimkar, Jia Wang, Jennifer Yates, Yin Zhang, Zihui Ge