Patents by Inventor Karthik CHOCKALINGAM

Karthik CHOCKALINGAM 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: 20230036683
    Abstract: A technique for wireless communications, comprising: determining a first channel state information (CSI) based on a current receive beam; determining a second CSI based on the current receive beam; determining a correlation metric between the first CSI and the second CSI; based a comparison between the determined correlation metric and a threshold value, determining to transmit the first or second CSI in response to a CSI reference signal (CSI-RS) received from a wireless node; determining a third CSI based on a candidate receive beam and the reference signal; and selecting the candidate receive beam based on the measured third CSI.
    Type: Application
    Filed: July 23, 2021
    Publication date: February 2, 2023
    Inventors: Sai Sravan Bharadwaj Karri, Guillaume Monghal, Maik Streller, Manish G. Vemulapalli, Sagar B. Shah, Karthik Chockalingam
  • Patent number: 10771188
    Abstract: An accessory device may establish a short range link to a companion device, and the accessory device may use the companion device as a proxy to conduct a data session over a cellular network. Based on a latency requirement associated with the data session and/or a signal strength of the short range link, the accessory device may dynamically determine to transition its cellular radio from a powered-off mode to a low power mode.
    Type: Grant
    Filed: June 1, 2018
    Date of Patent: September 8, 2020
    Assignee: Apple Inc.
    Inventors: Ajoy K. Singh, Ashkan Heshmati, Faraz Faheem, Jianxiong Shi, Karthik Chockalingam, Murtaza A. Shikari, Srinivasan Nimmala, Srirang A. Lovlekar, Suresh Koppisetty, John Y. Su
  • Patent number: 10667158
    Abstract: This disclosure relates to radio link monitoring techniques. According to some embodiments, a wireless device may establish a radio link with a cellular base station according to a radio access technology. The base station may provide reference signals, control signals, and data signals to the wireless device via the radio link. The wireless device may perform radio link monitoring of the radio link using characteristics of decoding performance for one or more of the control signals and the data signals. Performing radio link monitoring of the radio link may include determining whether the radio link is in-sync or out-of-sync and determining whether radio link failure has occurred.
    Type: Grant
    Filed: December 21, 2018
    Date of Patent: May 26, 2020
    Assignee: Apple Inc.
    Inventors: Sami M. Almalfouh, Li Su, Sai Sravan Bharadwaj Karri, Chiranjeevi M. Kosuri, Karthik Chockalingam, Swaminathan Balakrishnan
  • Publication number: 20190372708
    Abstract: An accessory device may establish a short range link to a companion device, and the accessory device may use the companion device as a proxy to conduct a data session over a cellular network. Based on a latency requirement associated with the data session and/or a signal strength of the short range link, the accessory device may dynamically determine to transition its cellular radio from a powered-off mode to a low power mode.
    Type: Application
    Filed: June 1, 2018
    Publication date: December 5, 2019
    Inventors: Ajoy K. Singh, Ashkan Heshmati, Faraz Faheem, Jianxiong Shi, Karthik Chockalingam, Murtaza A. Shikari, Srinivasan Nimmala, Srirang A. Lovlekar, Suresh Koppisetty, John Y. Su
  • Publication number: 20190124532
    Abstract: This disclosure relates to radio link monitoring techniques. According to some embodiments, a wireless device may establish a radio link with a cellular base station according to a radio access technology. The base station may provide reference signals, control signals, and data signals to the wireless device via the radio link. The wireless device may perform radio link monitoring of the radio link using characteristics of decoding performance for one or more of the control signals and the data signals. Performing radio link monitoring of the radio link may include determining whether the radio link is in-sync or out-of-sync and determining whether radio link failure has occurred.
    Type: Application
    Filed: December 21, 2018
    Publication date: April 25, 2019
    Inventors: Sami M. Almalfouh, Li Su, Sai Sravan Bharadwaj Karri, Chiranjeevi M. Kosuri, Karthik Chockalingam, Swaminathan Balakrishnan
  • Patent number: 10200897
    Abstract: This disclosure relates to radio link monitoring techniques. According to some embodiments, a wireless device may establish a radio link with a cellular base station according to a radio access technology. The base station may provide reference signals, control signals, and data signals to the wireless device via the radio link. The wireless device may perform radio link monitoring of the radio link using characteristics of decoding performance for one or more of the control signals and the data signals. Performing radio link monitoring of the radio link may include determining whether the radio link is in-sync or out-of-sync and determining whether radio link failure has occurred.
    Type: Grant
    Filed: March 31, 2017
    Date of Patent: February 5, 2019
    Assignee: Apple Inc.
    Inventors: Sami M. Almalfouh, Li Su, Sai Sravan Bharadwaj Karri, Chiranjeevi M. Kosuri, Karthik Chockalingam, Swaminathan Balakrishnan
  • Patent number: 10057830
    Abstract: Method and apparatus to trigger a handover of a mobile device from a serving cell to a neighbor cell based on signal quality are disclosed. The mobile device measures signal strength and signal quality for the serving cell. When the signal strength exceeds a network-defined threshold and the signal quality falls below a mobile device defined threshold, the mobile device measures at least one neighbor cell. When a neighbor cell exceeds the network-defined threshold for signal strength and also meets the mobile device defined signal quality threshold, the mobile device sends a measurement report to the serving cell to trigger the handover. The measurement report includes modified values that indicate the serving cell does not meet network-defined threshold values and that the neighbor cell outperforms the serving cell.
    Type: Grant
    Filed: June 26, 2017
    Date of Patent: August 21, 2018
    Assignee: Apple Inc.
    Inventors: Karthik Chockalingam, Sai Sravan Bharadwaj Karri, Swaminathan Balakrishnan, Sachin J. Sane
  • Publication number: 20180035345
    Abstract: Method and apparatus to trigger a handover of a mobile device from a serving cell to a neighbor cell based on signal quality are disclosed. The mobile device measures signal strength and signal quality for the serving cell. When the signal strength exceeds a network-defined threshold and the signal quality falls below a mobile device defined threshold, the mobile device measures at least one neighbor cell. When a neighbor cell exceeds the network-defined threshold for signal strength and also meets the mobile device defined signal quality threshold, the mobile device sends a measurement report to the serving cell to trigger the handover. The measurement report includes modified values that indicate the serving cell does not meet network-defined threshold values and that the neighbor cell outperforms the serving cell.
    Type: Application
    Filed: June 26, 2017
    Publication date: February 1, 2018
    Inventors: Karthik CHOCKALINGAM, Sai Sravan Bharadwaj KARRI, Swaminathan BALAKRISHNAN, Sachin J. SANE
  • Publication number: 20170311189
    Abstract: This disclosure relates to radio link monitoring techniques. According to some embodiments, a wireless device may establish a radio link with a cellular base station according to a radio access technology. The base station may provide reference signals, control signals, and data signals to the wireless device via the radio link. The wireless device may perform radio link monitoring of the radio link using characteristics of decoding performance for one or more of the control signals and the data signals. Performing radio link monitoring of the radio link may include determining whether the radio link is in-sync or out-of-sync and determining whether radio link failure has occurred.
    Type: Application
    Filed: March 31, 2017
    Publication date: October 26, 2017
    Inventors: Sami M. Almalfouh, Li Su, Sai Sravan Bharadwaj Karri, Chiranjeevi M. Kosuri, Karthik Chockalingam, Swaminathan Balakrishnan
  • Patent number: 9693281
    Abstract: Method and apparatus to trigger a handover of a mobile device from a serving cell to a neighbor cell based on signal quality are disclosed. The mobile device measures signal strength and signal quality for the serving cell. When the signal strength exceeds a network-defined threshold and the signal quality falls below a mobile device defined threshold, the mobile device measures at least one neighbor cell. When a neighbor cell exceeds the network-defined threshold for signal strength and also meets the mobile device defined signal quality threshold, the mobile device sends a measurement report to the serving cell to trigger the handover. The measurement report includes modified values that indicate the serving cell does not meet network-defined threshold values and that the neighbor cell outperforms the serving cell.
    Type: Grant
    Filed: September 30, 2015
    Date of Patent: June 27, 2017
    Assignee: Apple Inc.
    Inventors: Karthik Chockalingam, Sai Sravan Bharadwaj Karri, Swaminathan Balakrishnan, Sachin J. Sane
  • Publication number: 20160360462
    Abstract: Method and apparatus to trigger a handover of a mobile device from a serving cell to a neighbor cell based on signal quality are disclosed. The mobile device measures signal strength and signal quality for the serving cell. When the signal strength exceeds a network-defined threshold and the signal quality falls below a mobile device defined threshold, the mobile device measures at least one neighbor cell. When a neighbor cell exceeds the network-defined threshold for signal strength and also meets the mobile device defined signal quality threshold, the mobile device sends a measurement report to the serving cell to trigger the handover. The measurement report includes modified values that indicate the serving cell does not meet network-defined threshold values and that the neighbor cell outperforms the serving cell.
    Type: Application
    Filed: September 30, 2015
    Publication date: December 8, 2016
    Inventors: Karthik CHOCKALINGAM, Sai Sravan Bharadwaj KARRI, Swaminathan BALAKRISHNAN, Sachin J. SANE