Patents by Inventor Kameswara Medapalli

Kameswara Medapalli 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: 8942184
    Abstract: A method and apparatus for link adaptation in a wireless communication network is provided. The method includes computing a first channel quality parameter based on one or more channel quality parameters. The one or more channel quality parameters are associated with a communication link between a Mobile Station (MS) and a Base Station (BS). The method further includes determining a qualifying transmission unit to compute a correction parameter. The correction parameter is computed based on the first channel quality parameter and one or more transmission parameters. The one or more transmission parameter is associated with the communication link. Thereafter, the method schedules a transmission mode of the communication link based on a second channel quality parameter. The second channel quality parameter is estimated based the first channel quality parameter and the correction parameter.
    Type: Grant
    Filed: June 16, 2009
    Date of Patent: January 27, 2015
    Assignee: Broadcom Corporation
    Inventors: Kameswara Medapalli, Djordje Tujkovic, Kamlesh Rath, Louay Jalloul, Bertrand Hochwald
  • Patent number: 8750236
    Abstract: Embodiments for a method and apparatus of selecting a transmission mode between the subscriber and a base station are disclosed. One method includes determining a predictive window. Instantaneous channel quality measurements are averaged, wherein the averaging is dependent upon a size of the predictive window. A first estimate of the transmission mode is determined based on the averaged instantaneous channel quality measurements. A margin is calculated based on reception of a qualifying downlink transmission. The transmission mode is selected by updating the first estimate with the margin.
    Type: Grant
    Filed: September 14, 2012
    Date of Patent: June 10, 2014
    Assignee: Broadcom Corporation
    Inventors: Kameswara Medapalli, Djordje Tujkovic, Kamlesh Rath, Louay Jalloul, Bertrand Hochwald
  • Patent number: 8687594
    Abstract: Method and apparatuses for power and handoff management in a multiple wireless technology communication device are disclosed. One method includes a wireless device communicating using a first technology, and detecting availability of a second technology. Logic control of the wireless device receives a power level indicator of communication signals of the first technology, and determining an acceptable power level of communication signals of the second technology based on the power level indicator. The logic control determines a requested power level of communication signals of the second technology based on a request from a base station. The logic control provides a modified link quality representation to the base station if the requested power level is greater than the acceptable power level. The wireless device transmits to the base station with the second technology at the acceptable power level.
    Type: Grant
    Filed: February 23, 2011
    Date of Patent: April 1, 2014
    Assignee: Broadcom Corporation
    Inventor: Kameswara Medapalli
  • Patent number: 8611925
    Abstract: Estimating a location of a subscriber, including receiving a request for the location, identifying a serving base station of the subscriber, receiving a downlink frame from the serving base station, obtaining a time delay of a signal transmitted between the subscriber and the serving base station, the obtaining including estimating a time of arrival by extracting information from the received downlink frame, the extracting including, determining a channel impulse response of the downlink frame, and estimating the time of arrival by comparing a peak time of the determined channel impulse response with a start time of the downlink frame, the start time being estimated based on the channel impulse response exceeding a predetermined threshold value, estimating a distance between the subscriber and the serving base station based on the time delay, and estimating the location based on the estimated distance between the subscriber and the serving base station.
    Type: Grant
    Filed: September 12, 2012
    Date of Patent: December 17, 2013
    Assignee: Broadcom Corporation
    Inventors: Kameswara Medapalli, Robert G. Lorenz, Bertrand Hochwald, Arogyaswami Paulraj
  • Patent number: 8488610
    Abstract: A method and system for communicating packets in a Wireless Multicast and Broadcast communication network is provided. The method includes selecting a Modulation and Coding Scheme (MCS) for transmission of a packet. The packet is then transmitted using the selected MCS on at least one of a subset of available time slots, a subset of available frequency sub-carriers and a subset of available antennas. Thereafter, it is autonomously decided whether the plurality of transmitters are to retransmit the packet. Then, the packet is retransmitted on at least one of a different subset of time slots, a different subset of frequency sub-carriers and a different subset of antennas.
    Type: Grant
    Filed: May 16, 2007
    Date of Patent: July 16, 2013
    Assignee: Broadcom Corporation
    Inventors: Kameswara Medapalli, Louay Jalloul, Kamlesh Rath
  • Publication number: 20130010734
    Abstract: Embodiments for a method and apparatus of selecting a transmission mode between the subscriber and a base station are disclosed. One method includes determining a predictive window. Instantaneous channel quality measurements are averaged, wherein the averaging is dependent upon a size of the predictive window. A first estimate of the transmission mode is determined based on the averaged instantaneous channel quality measurements. A margin is calculated based on reception of a qualifying downlink transmission. The transmission mode is selected by updating the first estimate with the margin.
    Type: Application
    Filed: September 14, 2012
    Publication date: January 10, 2013
    Applicant: Broadcom Corporation
    Inventors: Kameswara Medapalli, Djordje Tujkovic, Kamlesh Rath, Louay Jalloul, Bertrand Hochwald
  • Publication number: 20130005358
    Abstract: Estimating a location of a subscriber, including receiving a request for the location, identifying a serving base station of the subscriber, receiving a downlink frame from the serving base station, obtaining a time delay of a signal transmitted between the subscriber and the serving base station, the obtaining including estimating a time of arrival by extracting information from the received downlink frame, the extracting including, determining a channel impulse response of the downlink frame, and estimating the time of arrival by comparing a peak time of the determined channel impulse response with a start time of the downlink frame, the start time being estimated based on the channel impulse response exceeding a predetermined threshold value, estimating a distance between the subscriber and the serving base station based on the time delay, and estimating the location based on the estimated distance between the subscriber and the serving base station.
    Type: Application
    Filed: September 12, 2012
    Publication date: January 3, 2013
    Applicant: Broadcom Corporation
    Inventors: Kameswara MEDAPALLI, Robert G. Lorenz, Bertrand Hochwald, Arogyaswami Paulraj
  • Patent number: 8311003
    Abstract: Embodiments for a method and apparatus of selecting a transmission mode between the subscriber and a base station are disclosed. One method includes determining a predictive window. Instantaneous channel quality measurements are averaged, wherein the averaging is dependent upon a size of the predictive window. A first estimate of the transmission mode is determined based on the averaged instantaneous channel quality measurements. A margin is calculated based on reception of a qualifying downlink transmission. The transmission mode is selected by updating the first estimate with the margin.
    Type: Grant
    Filed: June 18, 2009
    Date of Patent: November 13, 2012
    Assignee: Broadcom Corporation
    Inventors: Kameswara Medapalli, Djordje Tujkovic, Kamlesh Rath, Louay Jalloul, Bertrand Hochwald
  • Patent number: 8290508
    Abstract: A method and apparatus of estimating a location of a subscriber are disclosed. One method includes receiving a request for the location of the subscriber. The subscriber's serving base station, and a plurality of neighboring base stations sensed by the subscriber, are identified. The subscriber obtains a time delay from the serving base. The subscriber estimates a distance between the subscriber and the serving base station. The subscriber receives frames and estimates a delta time for each of the selected neighboring base stations for the subscriber to synchronize to each of the selected neighboring base stations. The subscriber estimates distances between the subscriber and each of the selected neighboring base. The subscriber location is estimated by trilateration of the distance between the subscriber and the serving base station, and the distances between the subscriber and each of the selected neighboring base stations.
    Type: Grant
    Filed: July 23, 2009
    Date of Patent: October 16, 2012
    Assignee: Broadcom Corporation
    Inventors: Kameswara Medapalli, Robert G. Lorenz, Bertrand Hochwald, Arogyaswami Paulraj
  • Patent number: 8125958
    Abstract: Embodiments for a method and apparatus of a wireless subscriber unit triggering an inter-technology handoff are disclosed. One method includes estimating a signal quality of first technology communication signals received from a serving base station. Information of neighboring base stations is received from the serving base station. Based on the information of the neighboring base stations, a signal quality of first technology communication signals received from each of the neighboring base stations is estimated. An inter-technology handoff is triggered based on a function of the signal quality of communication signals received from a serving base station and the signal quality of communication signals received from each of the neighboring base stations.
    Type: Grant
    Filed: May 26, 2009
    Date of Patent: February 28, 2012
    Assignee: Broadcom Corporation
    Inventor: Kameswara Medapalli
  • Publication number: 20110141939
    Abstract: Method and apparatuses for power and handoff management in a multiple wireless technology communication device are disclosed. One method includes a wireless device communicating using a first technology, and detecting availability of a second technology. Logic control of the wireless device receives a power level indicator of communication signals of the first technology, and determining an acceptable power level of communication signals of the second technology based on the power level indicator. The logic control determines a requested power level of communication signals of the second technology based on a request from a base station. The logic control provides a modified link quality representation to the base station if the requested power level is greater than the acceptable power level. The wireless device transmits to the base station with the second technology at the acceptable power level.
    Type: Application
    Filed: February 23, 2011
    Publication date: June 16, 2011
    Inventor: Kameswara Medapalli
  • Publication number: 20110086638
    Abstract: Method and apparatuses for power and handoff management in a multiple wireless technology communication device are disclosed. One method includes a wireless device communicating using a first technology, and detecting availability of a second technology. Logic control of the wireless device receives a power level indicator of communication signals of the first technology, and determining an acceptable power level of communication signals of the second technology based on the power level indicator. The logic control determines a requested power level of communication signals of the second technology based on a request from a base station. The logic control provides a modified link quality representation to the base station if the requested power level is greater than the acceptable power level. The wireless device transmits to the base station with the second technology at the acceptable power level.
    Type: Application
    Filed: October 8, 2010
    Publication date: April 14, 2011
    Applicant: BECEEM COMMUNICATIONS INC.
    Inventor: Kameswara Medapalli
  • Publication number: 20110021210
    Abstract: A method and apparatus of estimating a location of a subscriber are disclosed. One method includes receiving a request for the location of the subscriber. The subscriber's serving base station, and a plurality of neighboring base stations sensed by the subscriber, are identified. At least two of the neighboring base stations are selected to aid in estimating the location of the subscriber. Stored locations of the serving base station and the selected neighboring base stations are accessed. The subscriber obtains a time delay from the serving base station for maintaining synchronization of the subscriber with the serving base station. The subscriber estimates a distance between the subscriber and the serving base station based on the time delay. The subscriber receives frames including preambles from each of the selected neighboring base stations, and estimates a delta time for each of the selected neighboring base stations for the subscriber to synchronize to each of the selected neighboring base stations.
    Type: Application
    Filed: July 23, 2009
    Publication date: January 27, 2011
    Inventors: Kameswara Medapalli, Robert G. Lorenz, Bertrand Hochwald, Arogyaswami Paulraj
  • Publication number: 20090316636
    Abstract: Embodiments for a method and apparatus of selecting a transmission mode between the subscriber and a base station are disclosed. One method includes determining a predictive window. Instantaneous channel quality measurements are averaged, wherein the averaging is dependent upon a size of the predictive window. A first estimate of the transmission mode is determined based on the averaged instantaneous channel quality measurements. A margin is calculated based on reception of a qualifying downlink transmission. The transmission mode is selected by updating the first estimate with the margin.
    Type: Application
    Filed: June 18, 2009
    Publication date: December 24, 2009
    Inventors: Kameswara Medapalli, Djordje Tujkovic, Kamlesh Rath, Louay Jalloul, Bertrand Hochwald
  • Publication number: 20090310562
    Abstract: Embodiments for a method and apparatus of a wireless subscriber unit triggering an inter-technology handoff are disclosed. One method includes estimating a signal quality of first technology communication signals received from a serving base station. Information of neighboring base stations is received from the serving base station. Based on the information of the neighboring base stations, a signal quality of first technology communication signals received from each of the neighboring base stations is estimated. An inter-technology handoff is triggered based on a function of the signal quality of communication signals received from a serving base station and the signal quality of communication signals received from each of the neighboring base stations.
    Type: Application
    Filed: May 26, 2009
    Publication date: December 17, 2009
    Inventor: Kameswara Medapalli
  • Publication number: 20090310550
    Abstract: A method and apparatus for link adaptation in a wireless communication network is provided. The method includes computing a first channel quality parameter based on one or more channel quality parameters. The one or more channel quality parameters are associated with a communication link between a Mobile Station (MS) and a Base Station (BS). The method further includes determining a qualifying transmission unit to compute a correction parameter. The correction parameter is computed based on the first channel quality parameter and one or more transmission parameters. The one or more transmission parameter is associated with the communication link. Thereafter, the method schedules a transmission mode of the communication link based on a second channel quality parameter. The second channel quality parameter is estimated based the first channel quality parameter and the correction parameter.
    Type: Application
    Filed: June 16, 2009
    Publication date: December 17, 2009
    Inventors: Kameswara Medapalli, Djordje Tujkovic, Kamlesh Rath, Louay Jalloul, Bertrand Hochwald
  • Publication number: 20080285537
    Abstract: A method and system for communicating packets in a Wireless Multicast and Broadcast communication network is provided. The method includes selecting a Modulation and Coding Scheme (MCS) for transmission of a packet. The packet is then transmitted using the selected MCS on at least one of a subset of available time slots, a subset of available frequency sub-carriers and a subset of available antennas. Thereafter, it is autonomously decided whether the plurality of transmitters are to retransmit the packet. Then, the packet is retransmitted on at least one of a different subset of time slots, a different subset of frequency sub-carriers and a different subset of antennas.
    Type: Application
    Filed: May 16, 2007
    Publication date: November 20, 2008
    Inventors: Kameswara Medapalli, Louay Jalloul, Kamlesh Rath
  • Publication number: 20050259643
    Abstract: An advance over the prior art is achieved through an efficient method to retransmit erroneous frames by identifying the users who are most likely to experience a frame error and requests retransmissions from them. Since the recovery is done by starting with the most likely, second most likely etc., the invention results in faster recovery of data. Moreover, the invention reduces the battery consumption of subsequent mobile nodes by suppressing the retransmission requests that were already made by nodes preceding it. A key element of the invention is to rank the set of receiver nodes in the order of decreasingly worse channel conditions, i.e., from worst to best. Hence, with K receiver nodes, a transmit node assigns rank 1 to a receiver node to which it has the poorest radio channel condition. Similarly, it assigns rank K to the receiver node to which it has the best radio channel condition.
    Type: Application
    Filed: March 31, 2003
    Publication date: November 24, 2005
    Inventors: Mooi Chuah, Kameswara Medapalli