Patents by Inventor Kalyan Sundhar

Kalyan Sundhar 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: 9426284
    Abstract: Methods, systems, and computer readable media for call flow analysis using comparison level indicators (CLIs) are disclosed. One exemplary method includes emulating a plurality of user devices, transmitting test traffic to at least one device under test (DUT) using the emulated user devices, receiving traffic from the at least one DUT in response to the traffic transmitted by the emulated user devices, and analyzing the traffic received from the at least one DUT using one or more CLIs, wherein each CLI indicates particular information associated with the traffic to analyze or compare.
    Type: Grant
    Filed: November 12, 2014
    Date of Patent: August 23, 2016
    Assignee: Ixia
    Inventors: Robert Winn Prewitt, II, Kalyan Sundhar, Martin Robert Mathieson
  • Patent number: 9351186
    Abstract: The subject matter described herein includes methods, systems, and computer readable media for frequency selective channel modeling. One exemplary system includes a network equipment test device including at least one processor. The network equipment test device includes the UE emulator implemented by the at least one processor and configured to emulate a plurality of UEs that attach to and communicate with a device under test. The system further includes a frequency selective channel modeler configured to receive resource scheduling information for the UEs from the device under test, to determine channel performance categories for the UEs using the resource scheduling information and to determine values for channel quality parameters using the channel performance categories assigned to the resource blocks, which represent selected frequencies in the total channel bandwidth.
    Type: Grant
    Filed: May 16, 2014
    Date of Patent: May 24, 2016
    Assignee: Ixia
    Inventors: Prasada Rao Devarasetty, Kalyan Sundhar, Roger Alan Slyk
  • Patent number: 9154979
    Abstract: A system for scalably simulating multiple LTE UE devices includes an LTE multi-UE simulator. The simulator includes a common public radio interface (CPRI) module for receiving downlink data from an evolved node B (eNode B) under test and a downlink signal chain processing module including a common section for performing UE agnostic processing of the downlink data and a UE specific section for performing UE specific processing of the downlink data. The simulator further includes a control digital signal processor (DSP) for receiving the downlink data from the common section of the downlink signal chain processing module, for processing downlink data to obtain control information, and for forwarding the control information to the downlink signal chain processing module. The UE specific portion of the downlink signal chain processing module performs the UE specific processing using the control information.
    Type: Grant
    Filed: March 25, 2012
    Date of Patent: October 6, 2015
    Assignee: IXIA
    Inventors: Ramanathan Asokan, Kalyan Sundhar
  • Patent number: 9071995
    Abstract: Methods, systems, and computer readable media for performing long term evolution (LTE) uplink data processing are disclosed. One method occurs at an LTE multi-UE simulator. The method includes receiving at least one transport data block containing uplink data to be transmitted to a device under test and dynamically assigning, using processing information associated with the at least one transport data block, at least one physical resource from a plurality of dynamically assignable physical resources for processing the at least one transport block includes receiving at least one transport data block containing uplink data to be transmitted to a device under test.
    Type: Grant
    Filed: January 17, 2012
    Date of Patent: June 30, 2015
    Assignee: Ixia
    Inventors: Ram Asokan, Wilson Qiu, Kalyan Sundhar
  • Publication number: 20150140956
    Abstract: Methods, systems, and computer readable media for call flow analysis using comparison level indicators (CLIs) are disclosed. One exemplary method includes emulating a plurality of user devices, transmitting test traffic to at least one device under test (DUT) using the emulated user devices, receiving traffic from the at least one DUT in response to the traffic transmitted by the emulated user devices, and analyzing the traffic received from the at least one DUT using one or more CLIs, wherein each CLI indicates particular information associated with the traffic to analyze or compare.
    Type: Application
    Filed: November 12, 2014
    Publication date: May 21, 2015
    Inventors: Robert Winn Prewitt, II, Kalyan Sundhar, Martin Robert Mathieson
  • Patent number: 8913965
    Abstract: Methods, systems, and computer readable media for detecting antenna port misconfigurations are disclosed. According to one method, the method includes storing one or more reference signal maps for identifying reference signals in downlink data in memory. The method further includes receiving downlink data that appears to be associated with a first antenna port of a device under test (DUT). The method also includes identifying, using the one or more reference signal maps, a first reference signal in the downlink data, wherein the first reference signal appears to be associated with the first antenna port. The method further includes determining, using a first computed error vector magnitude associated with the first reference signal, whether the first antenna port is misconfigured.
    Type: Grant
    Filed: November 19, 2012
    Date of Patent: December 16, 2014
    Assignee: Ixia
    Inventors: Prasada Rao Devarasetty, Kalyan Sundhar, Roger Alan Slyk
  • Publication number: 20140341052
    Abstract: The subject matter described herein includes methods, systems, and computer readable media for frequency selective channel modeling. One exemplary system includes a network equipment test device including at least one processor. The network equipment test device includes the UE emulator implemented by the at least one processor and configured to emulate a plurality of UEs that attach to and communicate with a device under test. The system further includes a frequency selective channel modeler configured to receive resource scheduling information for the UEs from the device under test, to determine channel performance categories for the UEs using the resource scheduling information and to determine values for channel quality parameters using the channel performance categories assigned to the resource blocks, which represent selected frequencies in the total channel bandwidth.
    Type: Application
    Filed: May 16, 2014
    Publication date: November 20, 2014
    Applicant: Ixia
    Inventors: Prasada Rao Devarasetty, Kalyan Sundhar, Roger Alan Slyk
  • Publication number: 20140141728
    Abstract: Methods, systems, and computer readable media for detecting antenna port misconfigurations are disclosed. According to one method, the method includes storing one or more reference signal maps for identifying reference signals in downlink data in memory. The method further includes receiving downlink data that appears to be associated with a first antenna port of a device under test (DUT). The method also includes identifying, using the one or more reference signal maps, a first reference signal in the downlink data, wherein the first reference signal appears to be associated with the first antenna port. The method further includes determining, using a first computed error vector magnitude associated with the first reference signal, whether the first antenna port is misconfigured.
    Type: Application
    Filed: November 19, 2012
    Publication date: May 22, 2014
    Applicant: IXIA
    Inventors: Prasada Rao Devarasetty, Kalyan Sundhar, Roger Alan Slyk
  • Publication number: 20130184023
    Abstract: Methods, systems, and computer readable media for performing long term evolution (LTE) uplink data processing are disclosed. One method occurs at an LTE multi-UE simulator. The method includes receiving at least one transport data block containing uplink data to be transmitted to a device under test and dynamically assigning, using processing information associated with the at least one transport data block, at least one physical resource from a plurality of dynamically assignable physical resources for processing the at least one transport block includes receiving at least one transport data block containing uplink data to be transmitted to a device under test.
    Type: Application
    Filed: January 17, 2012
    Publication date: July 18, 2013
    Inventors: Ram Asokan, Kalyan Sundhar
  • Publication number: 20130155867
    Abstract: A system for scalably simulating multiple LTE UE devices includes an LTE multi-UE simulator. The simulator includes a common public radio interface (CPRI) module for receiving downlink data from an evolved node B (eNode B) under test and a downlink signal chain processing module including a common section for performing UE agnostic processing of the downlink data and a UE specific section for performing UE specific processing of the downlink data. The simulator further includes a control digital signal processor (DSP) for receiving the downlink data from the common section of the downlink signal chain processing module, for processing downlink data to obtain control information, and for forwarding the control information to the downlink signal chain processing module. The UE specific portion of the downlink signal chain processing module performs the UE specific processing using the control information.
    Type: Application
    Filed: March 25, 2012
    Publication date: June 20, 2013
    Inventors: Ramanathan Asokan, Kalyan Sundhar
  • Patent number: 8229416
    Abstract: Methods, systems, and computer readable media for stress testing mobile network equipment using CPRI are disclosed. According to one method, a plurality of messages is generated for simulating a plurality of user equipment (UE) devices. The plurality of messages is transmitted over a common public radio interface (CPRI) link to a radio equipment controller (REC) in order to stress test the REC component.
    Type: Grant
    Filed: December 17, 2008
    Date of Patent: July 24, 2012
    Assignee: Ixia
    Inventors: Arda Akman, Matthew Balkwill, David Hammond, Richard Karp, Edward Panofsky, Glenn Stewart, Kalyan Sundhar
  • Publication number: 20100075678
    Abstract: Methods, systems, and computer readable media for stress testing mobile network equipment using CPRI are disclosed. According to one method, a plurality of messages is generated for simulating a plurality of user equipment (UE) devices. The plurality of messages is transmitted over a common public radio interface (CPRI) link to a radio equipment controller (REC) in order to stress test the REC component.
    Type: Application
    Filed: December 17, 2008
    Publication date: March 25, 2010
    Inventors: Arda Akman, Matthew Balkwill, David Hammond, Richard Karp, Edward Panofsky, Glenn Stewart, Kalyan Sundhar