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).

  • Publication number: 20120236736
    Abstract: A method (500) and apparatus for multi-radio coexistence has a victim user equipment (UE) that receives (515) a sequence of subframes at a first transceiver from a serving base station, measures (520) channel state on the subframes to obtain channel state measurements, determines (530) a high-low interference pattern based on the channel state measurements, and transmits (550) to the serving base station a report that includes an indicator related to the high-low interference pattern. The method can include the victim UE receiving (610) an aggressor reference waveform (ARW) from the second transceiver, determining (620) spatial characteristics of the second transceiver from the ARW, and configuring (630) its antenna system based on the spatial characteristics. The method can have the victim UE determining (640) second transceiver characteristics from the ARW and transmitting (650) information regarding the second transceiver characteristics to its serving base station.
    Type: Application
    Filed: March 18, 2011
    Publication date: September 20, 2012
    Applicant: MOTOROLA MOBILITY, INC.
    Inventors: Colin D. Frank, Sandeep H. Krishnamurthy, Robert T. Love, Ajit Nimbalker, Ravikiran Nory, Kenneth A. Stewart
  • Publication number: 20120213096
    Abstract: A method in a wireless communication terminal includes receiving an aggregated carrier including a first component carrier and a second component carrier, measuring leakage of a reference signal from the first component carrier onto the second component carrier, receiving a signal on the aggregated carrier, and compensating for leakage of the signal from the first component carrier to the second component carrier based on the measurement of the leakage of the reference signal.
    Type: Application
    Filed: February 21, 2011
    Publication date: August 23, 2012
    Applicant: MOTOROLA MOBILITY, INC.
    Inventors: Sandeep H. Krishnamurthy, Colin D. Frank
  • Publication number: 20120214540
    Abstract: A method in a wireless communication device includes performing measurements of a first serving cell on a first carrier frequency at a first rate, determining whether a signal level of a second serving cell on a second carrier frequency exceeds a threshold, and performing measurements of the first serving cell at a second rate if the signal level of the second serving cell is below the threshold, wherein the second rate is higher than the first rate.
    Type: Application
    Filed: February 21, 2011
    Publication date: August 23, 2012
    Applicant: MOTOROLA MOBILITY, INC.
    Inventors: Murali Narasimha, Sandeep H. Krishnamurthy, Ravi Kuchibhotla
  • Publication number: 20120214541
    Abstract: A method in a wireless communication terminal including generating a first averaged signal measurement on a first carrier frequency, wherein the first averaged signal measurement is based on a first averaging period, producing a first filter output based on the first averaged signal measurement weighted by a first weight, generating a second averaged signal measurement on the first carrier frequency, wherein the second averaged signal measurement is based on a second averaging period, and producing a second filter output based on the first filter output and based on the second averaged signal measurement weighted by a second weight, wherein the first weight is less than the second weight if the second averaging period is greater than a threshold.
    Type: Application
    Filed: February 21, 2011
    Publication date: August 23, 2012
    Applicant: MOTOROLA MOBILITY, INC.
    Inventors: Murali Narasimha, Sandeep H. Krishnamurthy, Ravi Kuchibhotla
  • Publication number: 20120213095
    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: Application
    Filed: February 21, 2011
    Publication date: August 23, 2012
    Applicant: MOTOROLA MOBILITY, INC.
    Inventors: Sandeep H. Krishnamurthy, Colin D. Frank
  • Publication number: 20120172041
    Abstract: The cell searcher module (CSM) of a wireless communication device detects that the device is in coverage region of an eNB by processing received signal associated with the primary synchronization (PSCH) and secondary synchronization (SSCH) sequences transmitted by the eNB. The wireless device determines whether candidate SCH signals from candidate neighbor cells are synchronous with SCH sequences from the serving cell by implementing one of three methods. In a first method, the CSM generates a joint estimate of the received power of SSCH sequences corresponding to already detected/identified serving cell and a hypothetical neighbor cell. In a second method, the CSM re-constructs SCH sequences corresponding to already detected cells and subtracts the re-constructed SCH sequences from the received signal to obtain a residual signal with reduced serving cell interference. In a third embodiment, the CSM performs a correlation of estimated channel responses to determine whether the neighbor cell is present.
    Type: Application
    Filed: December 30, 2010
    Publication date: July 5, 2012
    Applicant: MOTOROLA MOBILITY, INC.
    Inventors: Sandeep H. Krishnamurthy, Colin D. Frank
  • Publication number: 20120122472
    Abstract: A method in a wireless terminal includes receiving a measurement subframe pattern indicating a first set of subframes on which a transmission from a first base station must be processed, receiving Positioning Reference Signal (PRS) subframe pattern information corresponding to a second base station, determining a subset of the first set of subframes that overlaps with subframes in the PRS subframe pattern information, and processing a transmission received in the subset of the first set of subframes from the first base station.
    Type: Application
    Filed: October 5, 2011
    Publication date: May 17, 2012
    Applicant: MOTOROLA MOBILITY, INC.
    Inventors: Sandeep H. Krishnamurthy, Robert T. Love, Ajit Nimbalker
  • Publication number: 20120122440
    Abstract: A method in a wireless communication terminal is disclosed. The method includes receiving a first signal including a desired second signal and an interference component, wherein the interference component includes at least a third signal transmitted in an Almost Blank Subframe (ABS) by a neighbor cell, and configuring the wireless communication terminal to employ interference reduction to process the first signal based on a configuration of the interference component.
    Type: Application
    Filed: October 5, 2011
    Publication date: May 17, 2012
    Applicant: MOTOROLA MOBILITY, INC.
    Inventors: Sandeep H. Krishnamurthy, Robert T. Love, Ajit Nimbalker
  • Publication number: 20120115485
    Abstract: A method in a mobile station for ranking cells in order to perform reselection from a serving cell to a second cell is disclosed. The method includes detecting a second cell that the mobile station is not allowed to access, determining resources used for transmission of a signal of the second cell, and applying a reselection bias if the resources used for transmission of the signal of the second cell do not substantially overlap resources used for transmission of a signal of the serving cell.
    Type: Application
    Filed: November 3, 2011
    Publication date: May 10, 2012
    Applicant: MOTOROLA MOBILITY, INC.
    Inventors: Murali Narasimha, Sandeep H. Krishnamurthy, Ravi Kuchibhotla
  • Publication number: 20120113847
    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: Application
    Filed: November 3, 2011
    Publication date: May 10, 2012
    Applicant: MOTOROLA MOBILITY, INC.
    Inventors: Murali Narasimha, Sandeep H. Krishnamurthy, Ravi Kuchibhotla
  • Publication number: 20120113961
    Abstract: A wireless communication terminal is disclosed. The terminal includes a transceiver coupled to a processor configured to estimate a signal power associated with a second transmission from a second base station, wherein the second transmission is part of a signal received at the terminal wherein the signal includes a first transmission from a first base station and the second transmission from the second base station. The processor is also configured to estimate a Receive Signal Strength Indicator (RSSI) of the received signal, and to subtract the signal power associated with the second transmission from the estimated RSSI to obtain a modified RSSI.
    Type: Application
    Filed: November 2, 2011
    Publication date: May 10, 2012
    Applicant: MOTOROLA MOBILITY, INC.
    Inventor: Sandeep H. Krishnamurthy
  • Publication number: 20120113846
    Abstract: A mobile station is disclosed wherein the mobile station determines interference by assessing one or more frames in a first periodic sequence of frames relative to a reference and, in response to the assessment, monitors transmissions from a base station for paging signals during a second periodic sequence of frames, wherein the second periodic sequence of frames is offset from the first periodic sequence of frames by a predetermined amount.
    Type: Application
    Filed: November 3, 2011
    Publication date: May 10, 2012
    Applicant: MOTOROLA MOBILITY, INC.
    Inventors: Murali Narasimha, Sandeep H. Krishnamurthy, Ravi Kuchibhotla, Ravikiran Nory
  • Publication number: 20120113844
    Abstract: A wireless communication terminal is disclose. The terminal includes a transceiver coupled to a processor configured to determine that a subset of a plurality of REs must be excluded from demodulation, the plurality of resource elements (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 block error rate (BLER).
    Type: Application
    Filed: November 2, 2011
    Publication date: May 10, 2012
    Applicant: MOTOROLA MOBILITY, INC.
    Inventor: Sandeep H. Krishnamurthy
  • Publication number: 20120115527
    Abstract: A mobile station in a wireless communication network is disclosed. The mobile station includes a transceiver coupled to a processor configured to rank a plurality of detected cells according to a signal level metric of the plurality of cells, to determine a first pattern of time periods during which a highest ranked cell is configured to transmit only a restricted set of information, and to perform measurements of cells other than the highest ranked cell, of the plurality of cells, only during the first pattern of time periods.
    Type: Application
    Filed: November 4, 2011
    Publication date: May 10, 2012
    Applicant: MOTOROLA MOBILITY, INC.
    Inventors: Murali Narasimha, Sandeep H. Krishnamurthy, Ravi Kuchibhotla
  • Patent number: 8165586
    Abstract: A base station, which includes a processor and a transmitter, communicates a reference signal to wireless communication devices in a wireless communication system. The processor encodes the reference signal into a first set of transmission resources, encodes other information into a second set of transmission resources, and multiplexes the two sets of transmission resources into a subframe, such that the first set of transmission 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 transmission resources is multiplexed into a second set of OFDM symbols. The transmitter transmits the subframe to the wireless devices. According to one embodiment, transmission resources for carrying the reference signal may be allocated according to a predetermined allocation, a semi-static allocation, a dynamic allocation, and/or an allocation based on higher layer signaling.
    Type: Grant
    Filed: March 3, 2011
    Date of Patent: April 24, 2012
    Assignee: Motorola Mobility, Inc.
    Inventors: Sandeep H. Krishnamurthy, Robert T. Love, Ajit Nimbalker, Kenneth A. Stewart, Xiangyang Zhuang
  • Patent number: 8127197
    Abstract: A method (300) for radio link control padding is shown. In its simplest form, it can include the steps of: providing (310) N bytes of data from a base station; interleaving (320) the N bytes of data using a turbo-interleaver; pre-pending (330) K bytes of zero padding; and passing (340) the interleaved N bytes and the pre-pended K bytes to a convolutional encoder to provide an output comprising a parity sequence adapted for further processing and providing a radio link control block for an enhanced general packet radio service 2-B mobile device. The method (300) is particularly adapted for use with Chase and incremental redundancy combining, which can provide fast, reliable and efficient general packet radio service to a 2-B mobile device.
    Type: Grant
    Filed: March 13, 2008
    Date of Patent: February 28, 2012
    Assignee: Motorola Mobility, Inc.
    Inventors: Colin D Frank, Sandeep H Krishnamurthy
  • Publication number: 20120003981
    Abstract: There are disclosed methods of a wireless communication device and a wireless base station. The device is served by a serving base station and receives from a neighbor base station a downlink transmission including a broadcast signal. The device decodes the broadcast signal, and determines a bandwidth attribute associated with the neighbor base station based on the broadcast signal. The device then sends to the serving base station a report including the bandwidth attribute associated with the neighbor base station. The wireless base station receives from a first wireless terminal a signal including a bandwidth attribute associated with a neighbor base station. The base station then schedules a second wireless terminal based on the bandwidth attribute of the neighbor base station, in which the first wireless terminal may be identical to the second wireless terminal.
    Type: Application
    Filed: July 2, 2010
    Publication date: January 5, 2012
    Applicant: MOTOROLA, INC.
    Inventors: Sandeep H. Krishnamurthy, Michael E. Buckley, Murali Narasimha
  • Publication number: 20110205914
    Abstract: A method in a wireless communication terminal including receiving a signal comprising at least a Positioning Reference Signal (PRS) transmission from a serving cell and a PRS transmission from a neighbor cell, estimating a signal quality metric (SQM) based on the PRS transmission from the neighbor cell, estimating a time difference of arrival (TDOA) measurement for the neighbor cell based on the PRS transmissions, determining if the estimated SQM satisfies a criterion, and sending a report to the serving cell that includes at least the estimated TDOA if the criterion is satisfied.
    Type: Application
    Filed: February 24, 2010
    Publication date: August 25, 2011
    Applicant: Motorola, Inc.
    Inventors: Sandeep H. Krishnamurthy, Colin D. Frank
  • Publication number: 20110176440
    Abstract: A mobile terminal receives a transmission from a base station including a group of Nprs consecutive subframes, where Nprs is a number of subframes constituting the group, and each subframe is capable of transmitting a positioning reference signal (PRS). The group of Nprs consecutive subframes is configured such that a transition between a subframe that does, or does not, include a PRS transmission to a subsequent subframe that does not, or does, include a PRS transmission can occur only after an even number of subframes 2*k, where k=0, 1, 2 . . . . The mobile terminal determines an estimated time of arrival of the transmission from the base station based on a portion of the transmission that includes a PRS transmission.
    Type: Application
    Filed: December 20, 2010
    Publication date: July 21, 2011
    Applicant: MOTOROLA-MOBILITY, INC.
    Inventors: Colin D. Frank, Sandeep H. Krishnamurthy
  • Publication number: 20110149903
    Abstract: A base station, which includes a processor and a transmitter, communicates a reference signal to wireless communication devices in a wireless communication system. The processor encodes the reference signal into a first set of transmission resources, encodes other information into a second set of transmission resources, and multiplexes the two sets of transmission resources into a subframe, such that the first set of transmission 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 transmission resources is multiplexed into a second set of OFDM symbols. The transmitter transmits the subframe to the wireless devices. According to one embodiment, transmission resources for carrying the reference signal may be allocated according to a predetermined allocation, a semi-static allocation, a dynamic allocation, and/or an allocation based on higher layer signaling.
    Type: Application
    Filed: March 3, 2011
    Publication date: June 23, 2011
    Inventors: Sandeep H. Krishnamurthy, Robert T. Love, Ajit Nimbalker, Kenneth A. Stewart, Xiangyang Zhuang