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: 8666321
    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: Grant
    Filed: February 21, 2011
    Date of Patent: March 4, 2014
    Assignee: Motorola Mobility LLC
    Inventors: Murali Narasimha, Sandeep H. Krishnamurthy, Ravi Kuchibhotla
  • Publication number: 20140056228
    Abstract: A method in a wireless communication device comprises determining transmission powers for at least two clusters, wherein each cluster includes at least one physical resource block (RB), determining a difference in a characteristic of the transmission powers determined for the at least two clusters, and varying a transmit power allocated to at least one cluster if the difference in the characteristic exceeds a power spread threshold, wherein the power allocated to each cluster is a function of pathloss between the wireless communication device and a serving base station.
    Type: Application
    Filed: October 31, 2013
    Publication date: February 27, 2014
    Inventors: Sandeep H. Krishnamurthy, Colin D. Frank, Vijay Nangia
  • Publication number: 20140018123
    Abstract: The present disclosure sets forth multiple embodiments of the invention. Among those embodiments is a method for managing the power of an uplink signal (e.g., an LTE PUSCH or PUCCH). The method involves determining a convolution of a first function and a second function (which may be power density functions) of the uplink signal and determining the power of the uplink signal based on the convolution. The uplink signal comprises one or both of a data signal (transmitted over a PUSCH, for example) and a control signal (transmitted over a PUSCH or PUCCH, for example). The uplink signal is transmitted over one or more subcarriers (which may be carried by resource blocks, for example).
    Type: Application
    Filed: July 16, 2012
    Publication date: January 16, 2014
    Applicant: Motorola Mobility LLC
    Inventors: Colin D. Frank, Sandeep H. Krishnamurthy, Tyler A. Brown
  • Patent number: 8619716
    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: February 21, 2011
    Date of Patent: December 31, 2013
    Assignee: Motorola Mobility LLC
    Inventors: Sandeep H. Krishnamurthy, Colin D. Frank
  • Patent number: 8611277
    Abstract: A wireless communication device includes a transceiver coupled to a controller configured to cause the device to receive a downlink transmission including a reference signal from a base station while camped on the base station in idle mode, to estimate a quality metric of a hypothetical paging channel reception based on the reference signal, and to determine perform reselection evaluation of a neighboring base stations based on the estimated quality metric.
    Type: Grant
    Filed: June 22, 2009
    Date of Patent: December 17, 2013
    Assignee: Motorola Mobility LLC
    Inventors: Sandeep H. Krishnamurthy, Ravi Kuchibhotla, Robert T. Love
  • Patent number: 8605615
    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: Grant
    Filed: March 18, 2011
    Date of Patent: December 10, 2013
    Assignee: Motorola Mobility LLC
    Inventors: Colin D Frank, Sandeep H Krishnamurthy, Robert T Love, Ajit Nimbalker, Ravikiran Nory, Kenneth A Stewart
  • Publication number: 20130315168
    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: Application
    Filed: July 30, 2013
    Publication date: November 28, 2013
    Inventors: Colin Frank, Sandeep H. Krishnamurthy, Kenneth A. Stewart, Ziangyang Zhuang, Robert T. Love
  • Publication number: 20130315085
    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: July 30, 2013
    Publication date: November 28, 2013
    Applicant: MOTOROLA MOBILITY LLC
    Inventors: Sandeep H. Krishnamurthy, Colin D. Frank
  • Publication number: 20130315157
    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: April 24, 2013
    Publication date: November 28, 2013
    Applicant: Motorola Mobility LLC
    Inventors: Sandeep H. Krishnamurthy, Hyejung Jung, Murali Narasimha, Ravikiran Nory
  • Publication number: 20130315084
    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: July 30, 2013
    Publication date: November 28, 2013
    Applicant: MOTOROLA MOBILITY LLC
    Inventors: Sandeep H. Krishnamurthy, Colin D. Frank
  • Publication number: 20130308485
    Abstract: A method in a wireless terminal transceiver includes receiving a sequence of frames from a first base station, wherein each frame in the sequence contains a first set of time-frequency resources which may be used for scheduling data and a second set of time-frequency resources not used for scheduling data. The transceiver also receives a message from the first base station identifying a third set of time-frequency resources that is a subset of the first set of time-frequency resources, and estimates the channel state based on the transmission received in the third set of time-frequency resources.
    Type: Application
    Filed: July 24, 2013
    Publication date: November 21, 2013
    Applicant: MOTOROLA MOBILITY LLC
    Inventors: Sandeep H. Krishnamurthy, Michael E. Buckley, Murali Narasimha
  • Publication number: 20130301542
    Abstract: Methods and apparatus' of determining radio link quality are disclosed. According to various implementations, a user equipment detects an out-of-synchronization condition corresponding to a first control channel, and monitors a second control channel in response to the detecting the out-of synchronization condition.
    Type: Application
    Filed: May 14, 2012
    Publication date: November 14, 2013
    Applicant: MOTOROLA MOBILITY, INC.
    Inventors: Sandeep H. Krishnamurthy, Ravi Kuchibhotla, Robert T. Love, Vijay Nangia, Ajit Nimbalker
  • Publication number: 20130301434
    Abstract: Methods and apparatus' of determining radio link quality are disclosed. According to various implementations, information indicating the time-frequency blocks to be monitored by a UE to enable the UE to locate a control channel is determined. The UE receives configuration information regarding resources used by a channel state information reference signal. It also receives configuration information regarding an interference measurement resource, as well as a channel state information reference signal. The channel state information reference signal uses the channel state information reference signal resources. A synchronization condition is determined based on the time frequency blocks to be monitored by the UE, the received channel state information reference signal and the interference measurement resource. The determined synchronization condition is sent to a higher layer.
    Type: Application
    Filed: May 14, 2012
    Publication date: November 14, 2013
    Applicant: MOTOROLA MOBILITY, INC.
    Inventors: Sandeep H. Krishnamurthy, Ravi Kuchibhotla, Robert T. Love, Vijay Nangia, Ajit Nimbalker
  • Patent number: 8565350
    Abstract: A method, telecommunication apparatus, and electronic device detect a status of a radio link. A transceiver 302 may receive a reference signal transmitted from a base station 104. A processor 304 may assume a transmission of a codeword of a first payload type from the base station and may determine a synchronization status based on the received reference signal and based on the assumed transmission of the codeword of the first payload type from the base station.
    Type: Grant
    Filed: September 6, 2012
    Date of Patent: October 22, 2013
    Assignee: Motorola Mobility LLC
    Inventors: Sandeep H. Krishnamurthy, Michael E. Buckley, Ravi Kuchibhotla, Robert T. Love, Ravi Nory
  • Publication number: 20130273905
    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: June 10, 2013
    Publication date: October 17, 2013
    Inventors: Sandeep H. Krishnamurthy, Colin D. Frank
  • Publication number: 20130258975
    Abstract: A method (300) and apparatus (200) that mitigates downlink control channel interference is disclosed. The method can include receiving (320) a transmission from a network entity and determining (330) a first timing offset to transmit a downlink subframe based on the transmission received from the network entity. The method can include receiving (340) an uplink transmission from a mobile terminal and determining (350) a second timing offset based on the first timing offset and based on the received uplink transmission. The method can include transmitting (360) a timing advance command to the mobile terminal, the timing advance command including the second timing offset.
    Type: Application
    Filed: April 23, 2013
    Publication date: October 3, 2013
    Applicant: MOTOROLA MOBILITY LLC
    Inventors: Sandeep H. Krishnamurthy, Robert T. Love, Vijay Nangia, Ravikiran Nory
  • Publication number: 20130250782
    Abstract: A method (400) and user equipment (106) monitor a radio link for a wireless communication terminal for an enhanced control channel. A processor (304) may receive a first type of reference signal. The processor may monitor a first type of control channel. The processor may estimate a first synchronization condition associated with the radio link based on the first type of reference signal. The processor may monitor the second type of control channel. The processor may estimate a second synchronization condition associated with the radio link based on a second type of reference signal.
    Type: Application
    Filed: March 23, 2012
    Publication date: September 26, 2013
    Applicant: Motorola Mobility, Inc.
    Inventors: Ajit Nimbalker, Sandeep H. Krishnamurthy, Robert T. Love
  • Publication number: 20130252606
    Abstract: A method (400) and user equipment (106) monitor a radio link for a wireless communication terminal for an enhanced control channel. A processor (304) may acquire signaling configuring the user equipment to monitor for a first type of control channel, where the first type of control channel can be demodulated based on a first type of reference signal. The processor may receive a second type of reference signal in at least one or more resource block set, where the second type of reference signal can be distinct from the first type of reference signal. The processor may estimate a synchronization condition based on the received second type of reference signal and at least one attribute of the control channel. The processor may send an output from a current layer to a higher layer based on the estimated synchronization condition.
    Type: Application
    Filed: March 23, 2012
    Publication date: September 26, 2013
    Applicant: Motorola Mobility, Inc.
    Inventors: Ajit Nimbalker, Sandeep H. Krishnamurthy, Robert T. Love
  • Publication number: 20130242975
    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: Application
    Filed: May 9, 2013
    Publication date: September 19, 2013
    Applicant: MOTOROLA MOBILITY LLC
    Inventors: Sandeep H. Krishnamurthy, Ravi Kuchibhotla
  • Publication number: 20130242789
    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: May 2, 2013
    Publication date: September 19, 2013
    Applicant: MOTOROLA MOBILITY LLC
    Inventors: Murali Narasimha, Sandeep H. Krishnamurthy, Ravi Kuchibhotla