Patents by Inventor Vyas Sekar
Vyas Sekar 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: 11943123Abstract: Determining a time-state metric includes receiving a stream of raw data values of an attribute. Each received raw data value of the attribute is associated with a timestamp. It further includes converting the received stream of raw data values into a timeline representation of the attribute over time. The timeline representation comprises a sequence of spans. A span comprises a span start time, a span end time, and a span value. The span value comprises an encoding of one or more values of the attribute over a time interval determined by the span start time and the span end time. It further includes determining a time-state metric according to a timeline request configuration. The timeline request configuration comprises one or more timeline operations. The time-state metric is computed at least in part by performing a timeline operation on the timeline representation of the attribute.Type: GrantFiled: August 31, 2023Date of Patent: March 26, 2024Assignee: Conviva Inc.Inventors: Henry Milner, Oleg Puzyrko, Jibin Zhan, Hui Zhang, Akara Sucharitakul, Vyas Sekar, Yihua Cheng
-
Patent number: 10924183Abstract: A reconfigurable free-space optical inter-rack network includes a plurality of server racks, each including at least one switch mounted on a top thereof, where each top-mounted switch includes a plurality of free-space-optic link connector, each with a free-space optical connection to a free-space-optic link connector on another top-mounted switch, a single ceiling mirror above the plurality of server racks that substantially covers the plurality of server racks, wherein the single ceiling mirror redirects optical connections between pairs of free-space-optic link connectors to provide a clear lines-of-sight between each pair of connected free-space-optic link connectors, and a controller that preconfigures a free-space optical network connecting the plurality of server racks by establishing connections between pairs of free-space-optic link connectors, and that reconfigures connections between pairs of free-space-optic link connectors in response to network traffic demands and events.Type: GrantFiled: June 15, 2018Date of Patent: February 16, 2021Assignee: THE RESEARCH FOUNDATION FOR THE STATE UNIVERSITY OF NEW YORKInventors: Himanshu Gupta, Navid Hamedazimi, Samir Ranjan Das, Jon Longtin, Vyas Sekar, Max Curran
-
Publication number: 20180294877Abstract: A reconfigurable free-space optical inter-rack network includes a plurality of server racks, each including at least one switch mounted on a top thereof, where each top mounted switch includes a plurality of free-space-optic link connector, each with a free-space optical connection to a free-space-optic link connector on another top-mounted switch, a single ceiling mirror above the plurality of server racks that substantially covers the plurality of server racks, wherein the single ceiling mirror redirects optical connections between pairs of free-space-optic link connectors to provide a clear lines-of-sight between each pair of connected free-space-optic link connectors, and a controller that preconfigures a free-space optical network connecting the plurality of server racks by establishing connections between pairs of free-space-optic link connectors, and that reconfigures connections between pairs of free-space-optic link connectors in response to network traffic demands and events.Type: ApplicationFiled: June 15, 2018Publication date: October 11, 2018Inventors: Himanshu Gupta, Navid Hamedazimi, Samir Ranjan Das, Jon Longtin, Vyas Sekar, Max Curran
-
Patent number: 10020880Abstract: A reconfigurable free-space optical inter-rack network includes a plurality of server racks, each including at least one switch mounted on a top thereof, where each top-mounted switch includes a plurality of free-space-optic link connector, each with a free-space optical connection to a free-space-optic link connector on another top-mounted switch, a single ceiling mirror above the plurality of server racks that substantially covers the plurality of server racks, wherein the single ceiling mirror redirects optical connections between pairs of free-space-optic link connectors to provide a clear lines-of-sight between each pair of connected free-space-optic link connectors, and a controller that preconfigures a free-space optical network connecting the plurality of server racks by establishing connections between pairs of free-space-optic link connectors, and that reconfigures connections between pairs of free-space-optic link connectors in response to network traffic demands and events.Type: GrantFiled: November 6, 2015Date of Patent: July 10, 2018Assignee: THE RESEARCH FOUNDATION FOR THE STATE UNIVERSITY OFNEW YORKInventors: Himanshu Gupta, Navid Hamed Azimi, Samir Ranjan Das, Jon Patrick Longtin, Vyas Sekar, Max S. Curran
-
Publication number: 20170026713Abstract: A client video player device downloads video content from a video content delivery network as segments encoded at respective bitrates selected from distinct encoding bitrates. Bitrate adaptation logic within the client video player selects the appropriate bitrate segment in order to maximize user-perceived Quality-of-Experience. An optimization of this bitrate adaptation logic implementing model predictive control that maximizes the user-perceived Quality-of-Experience is presented.Type: ApplicationFiled: March 28, 2016Publication date: January 26, 2017Inventors: Xiaoqi Yin, Vyas Sekar, Bruno Sinopoli
-
Publication number: 20160173199Abstract: A reconfigurable free-space optical inter-rack network includes a plurality of server racks, each including at least one switch mounted on a top thereof, where each top-mounted switch includes a plurality of free-space-optic link connector, each with a free-space optical connection to a free-space-optic link connector on another top-mounted switch, a single ceiling mirror above the plurality of server racks that substantially covers the plurality of server racks, wherein the single ceiling mirror redirects optical connections between pairs of free-space-optic link connectors to provide a clear lines-of-sight between each pair of connected free-space-optic link connectors, and a controller that preconfigures a free-space optical network connecting the plurality of server racks by establishing connections between pairs of free-space-optic link connectors, and that reconfigures connections between pairs of free-space-optic link connectors in response to network traffic demands and events.Type: ApplicationFiled: November 6, 2015Publication date: June 16, 2016Inventors: HIMANSHU GUPTA, NAVID HAMED AZIMI, SAMIR RANJAN DAS, JON PATRICK LONGTIN, VYAS SEKAR, MAX S. CURRAN
-
Patent number: 8509237Abstract: A network employing redundancy-aware hardware may actively allocate decompression tasks among different devices along a single path to improve data throughput. The allocation can be performed by a hash or similar process operating on a header of the packets to distribute caching according to predefined ranges of hash values without significant additional communication overhead. Decompression of packets may be similarly distributed by marking shim values to match the earlier caching of antecedent packets. Nodes may use coordinated cache sizes and organizations to eliminate the need for separate cache protocol communications.Type: GrantFiled: June 26, 2009Date of Patent: August 13, 2013Assignee: Wisconsin Alumni Research FoundationInventors: Srinivasa Aditya Akella, Ashok Anand, Vyas Sekar
-
Patent number: 8001601Abstract: A multi-staged framework for detecting and diagnosing Denial of Service attacks is disclosed in which a low-cost anomaly detection mechanism is first used to collect coarse data, such as may be obtained from Simple Network Management Protocol (SNMP) data flows. Such data is analyzed to detect volume anomalies that could possibly be indicative of a DDoS attack. If such an anomaly is suspected, incident reports are then generated and used to trigger the collection and analysis of fine grained data, such as that available in Netflow data flows. Both types of collection and analysis are illustratively conducted at edge routers within the service provider network that interface customers and customer networks to the service provider. Once records of the more detailed information have been retrieved, they are examined to determine whether the anomaly represents a distributed denial of service attack, at which point an alarm is generated.Type: GrantFiled: June 14, 2006Date of Patent: August 16, 2011Assignee: AT&T Intellectual Property II, L.P.Inventors: Nicholas Duffield, Jacobus Van Der Merwe, Vyas Sekar, Oliver Spatscheck
-
Patent number: 7933745Abstract: Disclosed is a method and system for determining one or more performance characteristics of a target server. A command is transmitted from a coordinator to a plurality of clients. The command instructs the plurality of clients to each transmit a request targeting a sub-system of said target server. A response time is then received from each client and a performance characteristic is determined from the received response times.Type: GrantFiled: April 8, 2008Date of Patent: April 26, 2011Assignee: AT&T Intellectual Property I, L.P.Inventors: Balachander Krishnamurthy, Srinivasa Aditya Akella, Pratap Ramamurthy, Vyas Sekar, Anees Shaikh
-
Publication number: 20100329256Abstract: A network employing redundancy-aware hardware may actively allocate decompression tasks among different devices along a single path to improve data throughput. The allocation can be performed by a hash or similar process operating on a header of the packets to distribute caching according to predefined ranges of hash values without significant additional communication overhead. Decompression of packets may be similarly distributed by marking shim values to match the earlier caching of antecedent packets. Nodes may use coordinated cache sizes and organizations to eliminate the need for separate cache protocol communications.Type: ApplicationFiled: June 26, 2009Publication date: December 30, 2010Inventors: Srinivasa Aditya Akella, Ashok Anand, Vyas Sekar
-
Publication number: 20090094000Abstract: Disclosed is a method and system for determining one or more performance characteristics of a target server. A command is transmitted from a coordinator to a plurality of clients. The command instructs the plurality of clients to each transmit a request targeting a sub-system of said target server. A response time is then received from each client and a performance characteristic is determined from the received response times.Type: ApplicationFiled: April 8, 2008Publication date: April 9, 2009Inventors: Balachander Krishnamurthy, Srinivasa Aditya Akella, Pratap Ramamurthy, Vyas Sekar, Anees Shaikh
-
Publication number: 20070283436Abstract: A multi-staged framework for detecting and diagnosing Denial of Service attacks is disclosed in which a low-cost anomaly detection mechanism is first used to collect coarse data, such as may be obtained from Simple Network Management Protocol (SNMP) data flows. Such data is analyzed to detect volume anomalies that could possibly be indicative of a DDoS attack. If such an anomaly is suspected, incident reports are then generated and used to trigger the collection and analysis of fine grained data, such as that available in Netflow data flows. Both types of collection and analysis are illustratively conducted at edge routers within the service provider network that interface customers and customer networks to the service provider. Once records of the more detailed information have been retrieved, they are examined to determine whether the anomaly represents a distributed denial of service attack, at which point an alarm is generated.Type: ApplicationFiled: June 14, 2006Publication date: December 6, 2007Inventors: Nicholas Duffield, Jacobus Van Der Merwe, Vyas Sekar, Oliver Spatscheck