Patents by Inventor Vikram Chandrasekhar

Vikram Chandrasekhar 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).

  • Publication number: 20180192383
    Abstract: A method of user equipment (UE) for system information transmission in a wireless communication system is provided.
    Type: Application
    Filed: December 28, 2017
    Publication date: July 5, 2018
    Inventors: Young-Han Nam, Vikram Chandrasekhar, Li Guo, Hao Chen
  • Patent number: 10014991
    Abstract: Modifications to frame/subframe structure are presented herein so that a wireless device can transmit its data within a fraction of a subframe. The device obtains data to be transmitted in an unlicensed spectrum and determines whether an entire subframe is required to completely communicate the data. If the data is small enough to not require the entire subframe, then the device generates a burst transmission to minimize the time period of the subframe used to communicate the data. The device transmits the burst transmission and a parameter indicating the duration of the burst transmission.
    Type: Grant
    Filed: October 13, 2015
    Date of Patent: July 3, 2018
    Assignee: Cisco Technology, Inc.
    Inventors: Vikram Chandrasekhar, James Seymour, Rajesh Pazhyannur, Andrew Myles
  • Patent number: 9967771
    Abstract: Presented herein are mechanisms to reduce collisions in deployments with Wi-Fi and Shared Access LTE (SAC-LTE) equipment as well SAC-LTE equipment from multiple operators. The mechanisms enhance the baseline energy detection mechanism by incorporating methods to decode cross-technology physical layer elements and media access control (MAC) layer elements in the Wi-Fi system to elements in the SAC-LTE system. The methods described improve the detection potential for transmitters, thereby reducing chances of cross-technology collisions.
    Type: Grant
    Filed: November 5, 2015
    Date of Patent: May 8, 2018
    Assignee: Cisco Technology, Inc.
    Inventors: Rajesh Pazhyannur, Brian Hart, Andrew Myles, Vikram Chandrasekhar
  • Publication number: 20180103486
    Abstract: An example method is provided in one example embodiment and includes receiving performance metric information from a plurality of small cell radios, wherein the performance metric information includes, at least in part, a number of user equipment that are to be scheduled on a first type and a second type of subframes for each small cell radio; determining resource allocation parameters for the plurality of small cell radios; exchanging interference information between two or more small cell radios of the plurality of small cell radios that includes an indication of whether a particular small cell radio is interfering with or is interfered by another small cell radio of the two or more small cell radios; and scheduling downlink resource transmissions on the first type and the second type of subframes for user equipment served by the two or more small cell radios.
    Type: Application
    Filed: November 10, 2017
    Publication date: April 12, 2018
    Inventors: Ritesh K. MADAN, Vikram CHANDRASEKHAR, Rohit Umesh NABAR, Kedar Durgadas SHIRALI, Qing ZHAO
  • Patent number: 9942901
    Abstract: A method is provided for minimizing cross-technology interference with data transmissions from a wireless device in a shared spectrum. The wireless device obtains data to be wirelessly transmitted in a transmission burst in a first radio access technology (RAT) format over a shared spectrum. The wireless device generates a preamble comprising assistance information related to the transmission burst. The preamble comprises a first preamble portion in the first RAT format and a second preamble portion in a second RAT format. The wireless device transmits the preamble followed by the transmission burst.
    Type: Grant
    Filed: November 5, 2015
    Date of Patent: April 10, 2018
    Assignee: Cisco Technology, Inc.
    Inventors: Vikram Chandrasekhar, James Seymour, Rajesh Pazhyannur, Andrew Myles
  • Publication number: 20180091988
    Abstract: A method of configuring a small cell base station in a cellular network via a cellular network manager includes, responsive to installation of the small cell base station, receiving measurement data from the small cell base station; determining one or more optimized values of one or more parameters for the small cell base station based on the measurement data and one or more constraints associated with at least a portion of the cellular network, wherein the one or more constraints are based on an impact of the small cell base station on one or more macrocells in the cellular network; and transmitting the one or more optimized values of one or more parameters to the small cell base station for configuration thereof.
    Type: Application
    Filed: December 4, 2017
    Publication date: March 29, 2018
    Inventors: Vikram Chandrasekhar, Andrea Goldsmith, Santhosh Krishna, Ritesh K. Madan
  • Patent number: 9918314
    Abstract: A method is provided in one example embodiment and may include determining one or more uplink inter cell interference coordination (ICIC) parameters for a plurality of cells based, at least in part, on feedback information associated with the plurality of cells; exchanging interference information between neighboring cells; and scheduling uplink transmissions for user equipment served by the neighboring cells based, at least in part, on the uplink ICIC parameters and the interference information exchanged between neighboring cells. A method is provided in another example embodiment and may include determining a ratio relating a first portion of a frequency spectrum for assigning fractional frequency re-use resources to a second portion of the frequency spectrum for assigning re-use one resources; and updating the ratio relating the first portion and the second portion of the frequency spectrum to optimize throughput rates for the plurality of user equipment across the plurality of cells.
    Type: Grant
    Filed: April 14, 2015
    Date of Patent: March 13, 2018
    Assignee: Cisco Technology, Inc.
    Inventors: Ritesh K. Madan, Rohit Umesh Nabar, Vikram Chandrasekhar, Kedar Durgadas Shirali
  • Patent number: 9867064
    Abstract: A method of configuring small cell base stations in a cellular network is disclosed. A constraint on a performance-related metric associated with at least a portion of the cellular network is received. In some embodiments, the constraint on the performance-related metric comprises a constraint on a performance-related metric associated with one or more macrocells. Measurement data from one or more small cell base stations is received via a control interface. One or more optimized values of one or more parameters associated with one or more small cell base stations are searched. The searching is based at least in part on the received measurement data and subject to the constraint on the performance-related metric associated with the at least a portion of the cellular network. The one or more optimized values of the one or more parameters to the associated small cell base stations are transmitted.
    Type: Grant
    Filed: November 20, 2015
    Date of Patent: January 9, 2018
    Assignee: wildfire.exchange, inc.
    Inventors: Vikram Chandrasekhar, Andrea Goldsmith, Santhosh Krishna, Ritesh K. Madan
  • Patent number: 9860852
    Abstract: A method is provided in one example embodiment and may include calculating, by one or more of a plurality of small cell radios, one or more sets of candidate power control parameters using a first interference constraint for uplink user equipment (UE) transmissions for UE served by the one or more of the plurality of small cell radios; determining, at a central management entity, whether an average of a sum of an expected interference for UE associated with the plurality of small cell radios violates a second interference constraint for any of the one or more sets of candidate power control parameters; and generating one or more messages for each of the plurality of small cell radios identifying one or more particular sets of power control parameters that provide for meeting the second interference constraint.
    Type: Grant
    Filed: August 24, 2015
    Date of Patent: January 2, 2018
    Assignee: Cisco Technology, Inc.
    Inventors: Ritesh K. Madan, Rohit Umesh Nabar, Vikram Chandrasekhar, Kedar Durgadas Shirali, Qing Zhao
  • Patent number: 9854536
    Abstract: An example method is provided in one example embodiment and includes receiving an indication of an average signal power for a downlink connection between a cell and each of a plurality of user equipment devices associated with the cell, receiving an indication of an average interference measurement on the downlink connection between the cell and each of the plurality of user equipment devices associated with the cell, and computing an average spectral efficiency for each of the plurality of user equipment devices based upon the respective average signal power and average interference measurement. The method further includes determining a transmission power level from among a plurality of available transmission power levels for one or more downlink resources for each of the plurality of user equipment devices based upon the computed average spectral efficiency for each of the plurality of user equipment devices.
    Type: Grant
    Filed: August 3, 2015
    Date of Patent: December 26, 2017
    Assignee: Cisco Technology, Inc.
    Inventors: Vikram Chandrasekhar, Ritesh K. Madan, Rohit Umesh Nabar, Kedar Durgadas Shirali
  • Publication number: 20170366234
    Abstract: A method of Coordinated Multipoint (CoMP) communication between a base station having a plurality of points with at least one user equipment (UE). At least one UE receives at least one transmission from the base station having the plurality of points. This UE measures downlink channel state information for each of the plurality of points including rank indicator (RI), a precoding matrix indicator (PMI) and a channel quality indicator (CQI). This UE transmits the downlink channel state information in an uplink feedback channel to the base station.
    Type: Application
    Filed: August 14, 2017
    Publication date: December 21, 2017
    Inventors: Runhua Chen, Vikram Chandrasekhar, Eko Onggosanusi
  • Patent number: 9839035
    Abstract: A method is provided in one example embodiment and may include determining one or more uplink inter cell interference coordination (ICIC) parameters for a plurality of cells based, at least in part, on feedback information associated with the plurality of cells; exchanging interference information between neighboring cells; and scheduling uplink transmissions for user equipment served by the neighboring cells based, at least in part, on the uplink ICIC parameters and the interference information exchanged between neighboring cells. A method is provided in another example embodiment and may include determining a ratio relating a first portion of a frequency spectrum for assigning fractional frequency re-use resources to a second portion of the frequency spectrum for assigning re-use one resources; and updating the ratio relating the first portion and the second portion of the frequency spectrum to optimize throughput rates for the plurality of user equipment across the plurality of cells.
    Type: Grant
    Filed: April 20, 2015
    Date of Patent: December 5, 2017
    Assignee: Cisco Technology, Inc.
    Inventors: Ritesh K. Madan, Rohit Umesh Nabar, Vikram Chandrasekhar, Kedar Durgadas Shirali
  • Patent number: 9826545
    Abstract: An example method is provided in one example embodiment and includes receiving performance metric information from a plurality of small cell radios, wherein the performance metric information includes, at least in part, a number of user equipment that are to be scheduled on a first type and a second type of subframes for each small cell radio; determining resource allocation parameters for the plurality of small cell radios; exchanging interference information between two or more small cell radios of the plurality of small cell radios that includes an indication of whether a particular small cell radio is interfering with or is interfered by another small cell radio of the two or more small cell radios; and scheduling downlink resource transmissions on the first type and the second type of subframes for user equipment served by the two or more small cell radios.
    Type: Grant
    Filed: November 25, 2015
    Date of Patent: November 21, 2017
    Assignee: Cisco Technology, Inc.
    Inventors: Ritesh K. Madan, Vikram Chandrasekhar, Rohit Umesh Nabar, Kedar Durgadas Shirali, Qing Zhao
  • Patent number: 9820296
    Abstract: An example method is provided in one example embodiment and includes receiving performance metric information from a plurality of small cell radios, wherein the performance metric information includes, at least in part, a number of user equipment that are to be scheduled on a first type and a second type of subframes for each small cell radio; determining resource allocation parameters for the plurality of small cell radios; exchanging interference information between two or more small cell radios of the plurality of small cell radios that includes an indication of whether a particular small cell radio is interfering with or is interfered by another small cell radio of the two or more small cell radios; and scheduling downlink resource transmissions on the first type and the second type of subframes for user equipment served by the two or more small cell radios.
    Type: Grant
    Filed: October 20, 2015
    Date of Patent: November 14, 2017
    Assignee: Cisco Technology, Inc.
    Inventors: Ritesh K. Madan, Vikram Chandrasekhar, Rohit Umesh Nabar, Kedar Durgadas Shirali, Qing Zhao
  • Publication number: 20170325106
    Abstract: A method of managing Wi-Fi access points using a Wi-Fi network manager is disclosed. Measurement data is received from a plurality of Wi-Fi access points via a control interface. Optimized adjustments to one or more Wi-Fi parameters associated with one or more of the plurality of access points are searched based at least in part on a set of network optimization goals and the measurement data received from the plurality of access points. At least some of the optimized adjustments to the one or more Wi-Fi parameters are transmitted to the one or more of the plurality of access points using the control interface.
    Type: Application
    Filed: July 26, 2017
    Publication date: November 9, 2017
    Inventors: Andrea Goldsmith, Vikram Chandrasekhar, Ritesh K. Madan, Santhosh Krishna
  • Publication number: 20170289923
    Abstract: A method is provided in one example embodiment and may include calculating, by one or more of a plurality of small cell radios, one or more sets of candidate power control parameters using a first interference constraint for uplink user equipment (UE) transmissions for UE served by the one or more of the plurality of small cell radios; determining, at a central management entity, whether an average of a sum of an expected interference for UE associated with the plurality of small cell radios violates a second interference constraint for any of the one or more sets of candidate power control parameters; and generating one or more messages for each of the plurality of small cell radios identifying one or more particular sets of power control parameters that provide for meeting the second interference constraint.
    Type: Application
    Filed: June 17, 2017
    Publication date: October 5, 2017
    Applicant: CISCO TECHNOLOGY, INC.
    Inventors: Ritesh K. Madan, Rohit Umesh Nabar, Vikram Chandrasekhar, Kedar Durgadas Shirali, Qing Zhao
  • Patent number: 9756654
    Abstract: Embodiments include starting a first timer if a queue state associated with a user equipment (UE) is estimated to equal zero bytes of data and if a last buffer status report received from the UE indicated the queue state to be greater than zero bytes of data, sending a control message granting uplink resources to the UE if the first timer expires, and determining the queue state associated with the UE based, at least in part, on a response to the control message. In specific embodiments the first timer expires if neither a scheduling request nor a buffer status report is received during a first timer interval after the first timer is started. Further embodiments include stopping the first timer if a scheduling request or a buffer status report is received before the first timer expires.
    Type: Grant
    Filed: October 28, 2015
    Date of Patent: September 5, 2017
    Assignee: Cisco Technology, Inc.
    Inventors: Vikram Chandrasekhar, Kedar D. Shirali, Ritesh K. Madan, Qing Zhao, Sushanth Chandappa Kulal
  • Patent number: 9735844
    Abstract: A method of Coordinated Multipoint (CoMP) communication between a base station having a plurality of points with at least one user equipment (UE). At least one UE receives at least one transmission from the base station having the plurality of points. This UE measures downlink channel state information for each of the plurality of points including a rank indicator (RI), a precoding matrix indicator (PMI) and a channel quality indicator (CQI). This UE transmits the downlink channel state information in an uplink feedback channel to the base station.
    Type: Grant
    Filed: May 9, 2012
    Date of Patent: August 15, 2017
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventors: Runhua Chen, Vikram Chandrasekhar, Eko Onggosanusi
  • Patent number: 9736703
    Abstract: A method of managing Wi-Fi access points using a Wi-Fi network manager is disclosed. Measurement data is received from a plurality of Wi-Fi access points via a control interface. Optimized adjustments to one or more Wi-Fi parameters associated with one or more of the plurality of access points are searched based at least in part on a set of network optimization goals and the measurement data received from the plurality of access points. At least some of the optimized adjustments to the one or more Wi-Fi parameters are transmitted to the one or more of the plurality of access points using the control interface.
    Type: Grant
    Filed: April 4, 2013
    Date of Patent: August 15, 2017
    Assignee: Plume Design, Inc.
    Inventors: Andrea Goldsmith, Vikram Chandrasekhar, Ritesh K. Madan, Santhosh Krishna
  • Publication number: 20170188255
    Abstract: This invention sets conditions for user equipment responses to channel state indicator request in channel state information that may conflict.
    Type: Application
    Filed: March 10, 2017
    Publication date: June 29, 2017
    Inventors: Vikram Chandrasekhar, Runhua Chen, Anthony Edet Ekpenyong