Patents by Inventor Sandeep H. Krishnamurthy

Sandeep H. Krishnamurthy 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: 11159969
    Abstract: A wireless terminal receives signaling information, pertaining to a reference signal transmission in at least one specifically designated sub frame, the signaling information including a list, the list including base station identities. The terminal determines, from at least one of the base station identities in the list, the time-frequency resources associated with a reference signal transmission intended for observed time difference of arrival (OTDOA) measurements from a transmitting base station associated with said one base station identity. The time of arrival of a transmission from the transmitting base station, relative to reference timing, is measured. The wireless terminal can receive a command from a serving cell to start performing inter-frequency OTDOA measurement on a frequency layer containing reference signals, the frequency layer distinct from the serving frequency layer, the serving frequency layer not containing positioning reference signals.
    Type: Grant
    Filed: March 30, 2015
    Date of Patent: October 26, 2021
    Assignee: GOOGLE TECHNOLOGY HOLDINGS LLC
    Inventors: Robert T. Love, Ajit Nimbalker, Kenneth A. Stewart, Sandeep H. Krishnamurthy, Xiangyang Zhuang
  • Publication number: 20180295606
    Abstract: Disclosed are methods for codebook sub-sampling. In various implementations, a wireless terminal receives a reference signal, determines, based on the reference signal, a first precoding index i2 for a first subband and a second precoding index i?2 for a second subband. The wireless terminal transmits a representation of i2 and a representation of 4 to a base station. In various implementations, i?2 belongs to the set Si2 which, in one implementation, equals {mod(i2?K1k,K), k=0, 1, . . . , K2}, where K1>1, and where K2>1 and K>1 are integers. According to an implementation, the wireless terminal receives the reference signal from a first base station and transmits the representations of i2 and i?2 to a second base station.
    Type: Application
    Filed: January 5, 2018
    Publication date: October 11, 2018
    Inventors: Sandeep H. Krishnamurthy, Tyler A. Brown, Robert T. Love, Vijay Nangia
  • Patent number: 10004058
    Abstract: Disclosed are methods for allowing a wireless communication device (or “user equipment” or “UE”) to receive signaling information when there is a power imbalance between a primary cell (“Pcell”) and a New Carrier Type (“NCT”) secondary cell (“Scell”). In one aspect, the UE reduces its downlink bandwidth to cover only a carrier of the Pcell, receives control signaling information, if present, and then increases its bandwidth to cover carriers of both the Pcell and Scell.
    Type: Grant
    Filed: November 10, 2016
    Date of Patent: June 19, 2018
    Assignee: Google Technology Holdings LLC
    Inventors: Sandeep H. Krishnamurthy, Hyejung Jung, Murali Narasimha, Ravikiran Nory
  • Patent number: 9877305
    Abstract: Disclosed are methods for codebook sub-sampling. In various implementations, a wireless terminal receives a reference signal, determines, based on the reference signal, a first precoding index i2 for a first subband and a second precoding index i?2 for a second subband. The wireless terminal transmits a representation of i2 and a representation of i?2 to a base station. In various implementations, i?2 belongs to the set Si2 which, in one implementation, equals {mod(i2?K1+k,K), k=0, 1, . . . , K2}, where K1>1, and where K2>1 and K>1 are integers. According to an implementation, the wireless terminal receives the reference signal from a first base station and transmits the representations of i2 and i?2 to a second base station.
    Type: Grant
    Filed: August 12, 2016
    Date of Patent: January 23, 2018
    Assignee: Google Technology Holdings LLC
    Inventors: Sandeep H. Krishnamurthy, Tyler A. Brown, Robert T. Love, Vijay Nangia
  • Patent number: 9832713
    Abstract: This disclosure sets forth methods and devices for communication between mobile devices and base stations with active and dormant states. In an embodiment, a base station transmits system information during an active state of the base station with at least one system-information message. The at least one system-information message includes a SystemInformationBlockType1 (“SIB1”) message with a first update-indicator field. The base station selects an update value that indicates whether the system information has changed since a previous transmission of a previous SIB1 message. The base station transmits at least one dormant-state message during a dormant state of the base station with the selected update value in a second update-indicator field of the at least one dormant-state message.
    Type: Grant
    Filed: February 3, 2017
    Date of Patent: November 28, 2017
    Assignee: Google Technology Holdings LLC
    Inventors: Ravikiran Nory, Sandeep H. Krishnamurthy, Ravi Kuchibhotla, Robert T. Love, Vijay Nangia, Ajit Nimbalker
  • Patent number: 9807633
    Abstract: A mobile station in a wireless communication network is disclosed. The mobile station includes a transceiver coupled to a processor configured to perform measurements of signals of one or more cells of a wireless communication system during a first set of subframes, to cause the transceiver to transmit a measurement report including at least the measurements of signals of the one or more cells, and to indicate that the measurements of the one or more cells were performed during the first set of subframes.
    Type: Grant
    Filed: November 3, 2011
    Date of Patent: October 31, 2017
    Assignee: Google Technology Holdings LLC
    Inventors: Murali Narasimha, Sandeep H. Krishnamurthy, Ravi Kuchibhotla
  • Patent number: 9794802
    Abstract: A method in a wireless communication terminal includes receiving an aggregated carrier including a first component carrier and a second component carrier, determining a level of interference from a signal received on the first component carrier to a signal on the second component carrier based on a signal characteristic of the first component carrier and a signal characteristic of the second component carrier, and providing signal interference information to a serving base station if the determined interference level satisfies a condition.
    Type: Grant
    Filed: July 30, 2013
    Date of Patent: October 17, 2017
    Assignee: Google Technology Holdings LLC
    Inventors: Sandeep H. Krishnamurthy, Colin D. Frank
  • Patent number: 9781639
    Abstract: This disclosure sets forth methods and devices for communication between mobile devices and base stations with active and dormant states. In an embodiment, a base station transmits system information during an active state of the base station with at least one system-information message. The at least one system-information message includes a SystemInformationBlockType1 (“SIB1”) message with a first update-indicator field. The base station selects an update value that indicates whether the system information has changed since a previous transmission of a previous SIB1 message. The base station transmits at least one dormant-state message during a dormant state of the base station with the selected update value in a second update-indicator field of the at least one dormant-state message.
    Type: Grant
    Filed: April 2, 2014
    Date of Patent: October 3, 2017
    Assignee: Google Technology Holdings LLC
    Inventors: Ravikiran Nory, Sandeep H. Krishnamurthy, Ravi Kuchibhotla, Robert T. Love, Vijay Nangia, Ajit Nimbalker
  • Publication number: 20170150428
    Abstract: This disclosure sets forth methods and devices for communication between mobile devices and base stations with active and dormant states. In an embodiment, a base station transmits system information during an active state of the base station with at least one system-information message. The at least one system-information message includes a SystemInformationBlockType1 (“SIB1”) message with a first update-indicator field. The base station selects an update value that indicates whether the system information has changed since a previous transmission of a previous SIB1 message. The base station transmits at least one dormant-state message during a dormant state of the base station with the selected update value in a second update-indicator field of the at least one dormant-state message.
    Type: Application
    Filed: February 3, 2017
    Publication date: May 25, 2017
    Inventors: Ravikiran Nory, Sandeep H. Krishnamurthy, Ravi Kuchibhotla, Robert T. Lov, Vijay Nangia, Ajit Nimbalker
  • Patent number: 9655013
    Abstract: This disclosure sets forth methods and devices for communication between mobile devices and base stations with active and dormant states. In an embodiment, a base station transmits system information during an active state of the base station with at least one system-information message. The at least one system-information message includes a SystemInformationBlockType1 (“SIB1”) message with a first update-indicator field. The base station selects an update value that indicates whether the system information has changed since a previous transmission of a previous SIB1 message. The base station transmits at least one dormant-state message during a dormant state of the base station with the selected update value in a second update-indicator field of the at least one dormant-state message.
    Type: Grant
    Filed: April 2, 2014
    Date of Patent: May 16, 2017
    Assignee: Google Technology Holdings LLC
    Inventors: Ravikiran Nory, Sandeep H. Krishnamurthy, Ravi Kuchibhotla, Robert T. Love, Vijay Nangia, Ajit Nimbalker
  • Patent number: 9654985
    Abstract: A wireless communication terminal including a controller coupled to a transceiver wherein the controller is configured to determine a synchronization based on a mapping of channel state information to decoder error rate corresponding to a hypothetical control code word, to attempt to decode a control codeword in a received signal, and to conclude that an out of synchronization event has not occurred if the control codeword is decoded successfully regardless of an indication of the mapping.
    Type: Grant
    Filed: May 9, 2013
    Date of Patent: May 16, 2017
    Assignee: Google Technology Holdings LLC
    Inventors: Sandeep H. Krishnamurthy, Ravi Kuchibhotla
  • Patent number: 9621308
    Abstract: A wireless communication terminal is disclosed. The terminal includes a transceiver coupled to a processor configured to determine that a subset of a plurality of resource elements (REs) must be excluded from demodulation, the plurality of REs received in a signal from a first base station, to estimate a hypothetical block error rate (BLER) based on the signal received from the first base station by excluding the subset of the plurality of REs, and to estimate channel state information based on the hypothetical BLER.
    Type: Grant
    Filed: September 15, 2014
    Date of Patent: April 11, 2017
    Assignee: Google Technology Holdings LLC
    Inventor: Sandeep H. Krishnamurthy
  • Patent number: 9603065
    Abstract: This disclosure sets forth methods and devices for communication between mobile devices and base stations with active and dormant states. In an embodiment, a base station transmits system information during an active state of the base station with at least one system-information message. The at least one system-information message includes a SystemInformationBlockType1 (“SIB1”) message with a first update-indicator field. The base station selects an update value that indicates whether the system information has changed since a previous transmission of a previous SIB1 message. The base station transmits at least one dormant-state message during a dormant state of the base station with the selected update value in a second update-indicator field of the at least one dormant-state message.
    Type: Grant
    Filed: April 2, 2014
    Date of Patent: March 21, 2017
    Assignee: Google Technology Holdings LLC
    Inventors: Ravikiran Nory, Sandeep H. Krishnamurthy, Ravi Kuchibhotla, Robert T. Love, Vijay Nangia, Ajit Nimbalker
  • Publication number: 20170064672
    Abstract: Disclosed are methods for allowing a wireless communication device (or “user equipment” or “UE”) to receive signaling information when there is a power imbalance between a primary cell (“Pcell”) and a New Carrier Type (“NCT”) secondary cell (“Scell”). In one aspect, the UE reduces its downlink bandwidth to cover only a carrier of the Pcell, receives control signaling information, if present, and then increases its bandwidth to cover carriers of both the Pcell and Scell.
    Type: Application
    Filed: November 10, 2016
    Publication date: March 2, 2017
    Applicant: Google Technology Holdings LLC
    Inventors: Sandeep H. Krishnamurthy, Hyejung Jung, Murali Narasimha, Ravikiran Nory
  • Patent number: 9541632
    Abstract: A base station communicates a positioning reference signal (PRS) to wireless communication devices over a downlink in a wireless communication system by encoding a PRS into a first set of transmission resources, encoding other information into a second set of transmission resources, multiplexing the two sets of resources into a subframe such that the first set of resources is multiplexed into at least a portion of a first set of orthogonal frequency division multiplexed (OFDM) symbols based on an identifier associated with the base station and the second set of resources is multiplexed into a second set of OFDM symbols. Upon receiving the subframe, a wireless communication device determines which set of transmission resources contains the PRS based on the identifier associated with the base station that transmitted the subframe and processes the set of resources containing the PRS to estimate timing (e.g., time of arrival) information.
    Type: Grant
    Filed: July 30, 2013
    Date of Patent: January 10, 2017
    Assignee: Google Technology Holdings LLC
    Inventors: Colin Frank, Sandeep H. Krishnamurthy, Kenneth A. Stewart, Xiangyang Zhuang, Robert T. Love
  • Patent number: 9538478
    Abstract: The present disclosure sets forth multiple embodiments of the invention. Among those embodiments is a method for determining a maximum power reduction of an uplink signal. The uplink signal is transmitted on a carrier that has a range of frequencies. Frequencies outside of the carrier frequency range include adjacent channel regions. Resource blocks of the carrier that have been allocated for use by to transmit the uplink signal are identified. A power spectral density is determined based on the identified resource blocks. A metric that is based on a third order convolution of the power spectral density function is determined. A maximum power reduction for the adjacent channel regions is also determined based on the metric.
    Type: Grant
    Filed: December 8, 2015
    Date of Patent: January 3, 2017
    Assignee: Google Technology Holdings LLC
    Inventors: Colin D. Frank, Tyler A. Brown, Sandeep H. Krishnamurthy
  • Patent number: 9521632
    Abstract: A method and apparatus for power allocation for overlapping transmissions is provided herein. During operation, user equipment will determine if transmissions to a single base station, on various frequencies, will be overlapping. If so, a determination is made to back off the power for at least one transmission on one frequency.
    Type: Grant
    Filed: August 15, 2011
    Date of Patent: December 13, 2016
    Assignee: Google Technology Holdings LLC
    Inventors: Murali Narasimha, Vijay Nangia, Ravikiran Nory, Sandeep H. Krishnamurthy
  • Publication number: 20160353413
    Abstract: Disclosed are methods for codebook sub-sampling. In various implementations, a wireless terminal receives a reference signal, determines, based on the reference signal, a first precoding index i2 for a first subband and a second precoding index i?2 for a second subband. The wireless terminal transmits a representation of i2 and a representation of i?2 to a base station. In various implementations, i?2 belongs to the set Si2 which, in one implementation, equals {mod(i2?K1+k,K), k=0,1 , . . . , K2}, where K1>1, and where K2>1 and K>1 are integers. According to an implementation, the wireless terminal receives the reference signal from a first base station and transmits the representations of i2 and i?2 to a second base station.
    Type: Application
    Filed: August 12, 2016
    Publication date: December 1, 2016
    Inventors: Sandeep H. Krishnamurthy, Tyler A. Brown, Robert T. Love, Vijay Nangia
  • Patent number: 9510328
    Abstract: Disclosed are methods for allowing a wireless communication device (or “user equipment” or “UE”) to receive signaling information when there is a power imbalance between a primary cell (“Pcell”) and a New Carrier Type (“NCT”) secondary cell (“Scell”). In one aspect, the UE reduces its downlink bandwidth to cover only a carrier of the Pcell, receives control signaling information, if present, and then increases its bandwidth to cover carriers of both the Pcell and Scell.
    Type: Grant
    Filed: April 24, 2013
    Date of Patent: November 29, 2016
    Assignee: Google Technology Holdings LLC
    Inventors: Sandeep H. Krishnamurthy, Hyejung Jung, Murali Narasimha, Ravikiran Nory
  • Patent number: 9491641
    Abstract: A method in a wireless communication terminal includes receiving an aggregated carrier including a first component carrier and a second component carrier, determining a level of interference from a signal received on the first component carrier to a signal on the second component carrier based on a signal characteristic of the first component carrier and a signal characteristic of the second component carrier, and providing signal interference information to a serving base station if the determined interference level satisfies a condition.
    Type: Grant
    Filed: July 30, 2013
    Date of Patent: November 8, 2016
    Assignee: Google Technology Holdings LLC
    Inventors: Sandeep H. Krishnamurthy, Colin D. Frank