Patents by Inventor Sandeep Krishnamurthy

Sandeep 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: 8666417
    Abstract: A method (700, 800) and apparatus (500, 600) for distinguishing cells with the same physical cell identifier is disclosed. The method can include receiving (820) a handover request message including target cell timing offset information at a potential target cell base station, where the potential target cell base station can have a physical cell identifier. The method can include comparing (830) the received target cell timing offset information with stored timing offset information at the potential target cell base station. The method can include sending (840) a handover request accept message if the received target cell timing offset information is substantially equal to the stored timing offset information. The method can also include receiving (720), at a wireless terminal, a target cell physical cell identifier and determining (730) a target cell timing offset of a radio frame of the target cell with respect to reference timing of a serving cell.
    Type: Grant
    Filed: March 16, 2009
    Date of Patent: March 4, 2014
    Assignee: Motorola Mobility LLC
    Inventors: Murali Narasimha, Sandeep Krishnamurthy, Ravi Kuchibhotla
  • Publication number: 20130315358
    Abstract: A method, telecommunication apparatus, and electronic device for detecting a status of a radio link are disclosed. A transceiver 302 may maintain a radio link with a network base station 104. A processor 304 may map channel state information to a synchronization status associated with the radio link based on the received signal and determine the synchronization status via a block error rate estimate in the radio link based on the channel state information.
    Type: Application
    Filed: July 30, 2013
    Publication date: November 28, 2013
    Inventors: Sandeep Krishnamurthy, Eoin Buckley, Ravi Kuchibhotla, Robert T Love, Ravi Nory
  • Patent number: 8457079
    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: Grant
    Filed: October 5, 2009
    Date of Patent: June 4, 2013
    Assignee: Motorola Mobility LLC
    Inventors: Sandeep Krishnamurthy, Robert Love, Vijay Nangia, Ravikiran Nory
  • Patent number: 8442021
    Abstract: A method for predicting performance of a radio link in a wireless communication terminal including hypothesizing a second codeword including information associated with a hypothesized first codeword, obtaining channel state information from a received signal, and estimating a decoder error rate of the first codeword under a condition that the second codeword may not be decoded correctly, wherein the decoder error rate is estimated using the channel state information.
    Type: Grant
    Filed: October 26, 2009
    Date of Patent: May 14, 2013
    Assignee: Motorola Mobility LLC
    Inventors: Sandeep Krishnamurthy, Ravi Kuchibhotla
  • Patent number: 8428022
    Abstract: A method (300, 500) and apparatus (200) that transmits and/or receives positioning reference signals in a wireless communication network using a mixture of cyclic prefix types. The method may include configuring (320) subframes in the wireless communication network as multicast broadcast single frequency network subframes. The method may include configuring (330) subframes in the wireless communication network as positioning subframes including positioning reference signals. The method may include determining (340) whether all of the positioning subframes are multicast broadcast single frequency network subframes. The method may include generating (350) extended cyclic prefix positioning reference signals for all of the positioning subframes if all of the positioning subframes are multicast broadcast single frequency network subframes.
    Type: Grant
    Filed: August 27, 2010
    Date of Patent: April 23, 2013
    Assignee: Motorola Mobility LLC
    Inventors: Colin Frank, Sandeep Krishnamurthy
  • Patent number: 8374633
    Abstract: A method, a user communication device, and a base station are disclosed. A transceiver 302 may receive a serving transmission from a serving base station. A processor 304 may make a status determination of a muting status of a neighbor base station based on the serving transmission.
    Type: Grant
    Filed: October 5, 2009
    Date of Patent: February 12, 2013
    Assignee: Motorola Mobility LLC
    Inventors: Colin Frank, Sandeep Krishnamurthy
  • Patent number: 8300757
    Abstract: A method, telecommunication apparatus, and electronic device for detecting a status of a radio link are disclosed. A transceiver 302 may maintain a radio link with a network base station 104. A processor 304 may map channel state information to a synchronization status associated with the radio link based on the received signal and determine the synchronization status via a block error rate estimate in the radio link based on the channel state information.
    Type: Grant
    Filed: August 8, 2008
    Date of Patent: October 30, 2012
    Assignee: Motorola Mobility LLC
    Inventors: Sandeep Krishnamurthy, Michael E. Buckley, Ravi Kuchibhotla, Robert Love, Ravi Nory
  • Publication number: 20120051445
    Abstract: A method (300, 500) and apparatus (200) that transmits and/or receives positioning reference signals in a wireless communication network using a mixture of cyclic prefix types. The method may include configuring (320) subframes in the wireless communication network as multicast broadcast single frequency network subframes. The method may include configuring (330) subframes in the wireless communication network as positioning subframes including positioning reference signals. The method may include determining (340) whether all of the positioning subframes are multicast broadcast single frequency network subframes. The method may include generating (350) extended cyclic prefix positioning reference signals for all of the positioning subframes if all of the positioning subframes are multicast broadcast single frequency network subframes.
    Type: Application
    Filed: August 27, 2010
    Publication date: March 1, 2012
    Applicant: Motorola, Inc.
    Inventors: Colin FRANK, Sandeep Krishnamurthy
  • Publication number: 20110080896
    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: October 5, 2009
    Publication date: April 7, 2011
    Applicant: Motorola, Inc.
    Inventors: Sandeep Krishnamurthy, Robert Love, Vijay Nangia, Ravikiran Nory
  • Publication number: 20110081917
    Abstract: A method, a user communication device, and a base station are disclosed. A transceiver 302 may receive a serving transmission from a serving base station. A processor 304 may make a status determination of an autonomous muting status of a neighbor base station based on the serving transmission.
    Type: Application
    Filed: October 5, 2009
    Publication date: April 7, 2011
    Applicant: Motorola, Inc.
    Inventors: Colin FRANK, Sandeep Krishnamurthy
  • Publication number: 20110039583
    Abstract: A method, a user communication device, and a base station are disclosed. A network interface 260 may synchronize a serving positioning reference transmission 116 with the coordinated network 100. A transceiver 240 may send the serving positioning reference transmission 116 in a set of positioning subframes. A processor 210 may mute the serving positioning reference transmission 116 according to a muting pattern optimized to allow the user communication device 102 to receive a maximum number of neighbor positioning reference transmissions 118 for the set of positioning subframes.
    Type: Application
    Filed: August 17, 2009
    Publication date: February 17, 2011
    Applicant: Motorola, Inc.
    Inventors: Colin FRANK, Sandeep KRISHNAMURTHY
  • Publication number: 20100279621
    Abstract: A method (300) and apparatus (106) for transmitting information based on a relationship between a first channel and a second channel is disclosed. The method can include taking (302) a first channel measurement corresponding to a first antenna of a wireless terminal and taking (304) a second channel measurement corresponding to a second antenna of the wireless terminal. The method can include determining (306) a relationship between the first channel and the second channel based on the first channel measurement and based on the second channel measurement. The method can include transmitting (310) information related to an uplink transmission where the information can be based on the relationship.
    Type: Application
    Filed: April 30, 2009
    Publication date: November 4, 2010
    Applicant: Motorola, Inc.
    Inventors: Tyler BROWN, Colin Frank, Sandeep Krishnamurthy, Kenneth Stewart, Xiangyang Zhuang
  • Publication number: 20100234028
    Abstract: A method (700, 800) and apparatus (500, 600) for distinguishing cells with the same physical cell identifier is disclosed. The method can include receiving (820) a handover request message including target cell timing offset information at a potential target cell base station, where the potential target cell base station can have a physical cell identifier. The method can include comparing (830) the received target cell timing offset information with stored timing offset information at the potential target cell base station. The method can include sending (840) a handover request accept message if the received target cell timing offset information is substantially equal to the stored timing offset information. The method can also include receiving (720), at a wireless terminal, a target cell physical cell identifier and determining (730) a target cell timing offset of a radio frame of the target cell with respect to reference timing of a serving cell.
    Type: Application
    Filed: March 16, 2009
    Publication date: September 16, 2010
    Applicant: Motorola, Inc.
    Inventors: Murali NARASIMHA, Sandeep Krishnamurthy, Ravi Kuchibhotla
  • Publication number: 20100172399
    Abstract: A method, a mobile system, and a user device for determining a delay spread are disclosed. A memory 306 may store a compound test value based on a multiburst history. The multiburst history may be a set of power delay profile decisions. A processor 304 may create a short power delay profile channel estimate and a long power delay profile channel estimate. The processor 304 may select a chosen power delay profile channel estimate based on the compound test value.
    Type: Application
    Filed: December 30, 2009
    Publication date: July 8, 2010
    Applicant: MOTOROLA, INC.
    Inventors: Sandeep KRISHNAMURTHY, Colin FRANK, Kenneth STEWART
  • Publication number: 20100034092
    Abstract: A method, telecommunication apparatus, and electronic device for detecting a status of a radio link are disclosed. A transceiver 302 may maintain a radio link with a network base station 104. A processor 304 may map channel state information to a synchronization status associated with the radio link based on the received signal and determine the synchronization status via a block error rate estimate in the radio link based on the channel state information.
    Type: Application
    Filed: August 8, 2008
    Publication date: February 11, 2010
    Applicant: Motorola, Inc.
    Inventors: Sandeep KRISHNAMURTHY, Michael E. Buckley, Ravi Kuchibhotla, Robert Love, Ravi Nory