Patents by Inventor Pavan Kumar Vitthaladevuni

Pavan Kumar Vitthaladevuni 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: 8681689
    Abstract: A method for adjusting a received channel quality indicator is described. A channel quality indicator is received from a wireless communication device. A first transmission time interval for which the channel quality indicator was generated is determined. The received channel quality indicator is adjusted using an outer loop margin. The outer loop margin is dependent on a transmission mode of the first transmission time interval.
    Type: Grant
    Filed: July 25, 2011
    Date of Patent: March 25, 2014
    Assignee: Qualcomm Incorporated
    Inventors: Pavan Kumar Vitthaladevuni, Haitong Sun, Sharad Deepak Sambhwani
  • Publication number: 20140029455
    Abstract: A method and apparatus for determining available downlink bandwidth are described. The described aspects may include estimating an available link capacity of a cell for a user equipment. The described aspects may include estimating an available fraction of cell resources for the user equipment. The described aspects may include estimating available bandwidth of the cell for the user equipment as a function of the estimated available link capacity and the estimated available fraction of cell resources. Available bandwidth may be estimated for a cell in a Universal Mobile Telecommunications System (UMTS) system when the user equipment is in an idle mode and/or a connected mode. Available bandwidth may be estimated for a cell in a Long Term Evolution (LTE) system when the user equipment is in an idle mode and/or a connected mode.
    Type: Application
    Filed: April 26, 2013
    Publication date: January 30, 2014
    Applicant: QUALCOMM Incorporated
    Inventors: Pavan Kumar VITTHALADEVUNI, Arnaud MEYLAN, Sharad Deepak SAMBHWANI, Brandon Allen BURDGE, Sridhar RAMANUJAM, Siddharth MOHAN
  • Patent number: 8599777
    Abstract: A method for providing multiple-user multiple-input and multiple-output in a high-speed packet access system is described. A channel quality indicator is received from a dual-stream-capable wireless communication device requesting a single-stream transmission at a first data rate. The first data rate is adjusted by an adaptive outer loop margin to obtain a second data rate. A data stream is transmitted to the wireless communication device using the second data rate. A positive-acknowledgement/negative-acknowledgement (ACK/NACK) is received from the wireless communication device. The adaptive outer loop margin is adjusted according to the received ACK/NACK.
    Type: Grant
    Filed: November 15, 2010
    Date of Patent: December 3, 2013
    Assignee: QUALCOMM Incorporated
    Inventors: Pavan Kumar Vitthaladevuni, Haitong Sun, Danlu Zhang, Vinay Chande, Stefan Brueck, Josef J. Blanz
  • Patent number: 8599763
    Abstract: A method, apparatus, processing system, and computer program product enable association of mis-aligned subframes from a first and second downlink with one another, such that a HARQ acknowledgment message including jointly encoded feedback for the respective subframes can be correctly interpreted by the corresponding cells. Here, an RNC may provide an RRC message to the UE to associate particular subframes with one another. Further, the RNC may provide NBAP messages to the cells transmitting the downlink signals, so that the cells can associate the HARQ acknowledgment message with the appropriate subframe. Still further, additional signaling provides for changing the set of associated subframes when needed due to a drift in the timing offset between cells.
    Type: Grant
    Filed: August 12, 2011
    Date of Patent: December 3, 2013
    Assignee: QUALCOMM Incorporated
    Inventors: Pavan Kumar Vitthaladevuni, Haitong Sun, Danlu Zhang, Sharad Deepak Sambhwani, Jilei Hou
  • Patent number: 8565146
    Abstract: Techniques for supporting data transmission on multiple carriers in a wireless communication system are described. A user equipment (UE) may determine available transmit power for data transmission on multiple carriers. The UE may distribute the available transmit power to multiple carriers (e.g., using uniform power distribution, greedy filling, water filling, etc.) to obtain allocated transmit power for data for each carrier. The UE may send at least one resource request with information indicative of the allocated transmit power for each of the multiple carriers to a Node B. The UE may receive at least one resource grant with information indicative of granted transmit power for each of at least one carrier, which may be all or a subset of the multiple carriers. The UE may send data on the at least one carrier and may limit its transmit power for each carrier to the granted transmit power for that carrier.
    Type: Grant
    Filed: February 26, 2009
    Date of Patent: October 22, 2013
    Assignee: QUALCOMM Incorporated
    Inventors: Danlu Zhang, Mehmet Yavuz, Bibhu P. Mohanty, Pavan Kumar Vitthaladevuni
  • Patent number: 8565170
    Abstract: Techniques for scheduling data transmission on multiple carriers in a wireless communication system are described. In one design, a scheduler may receive requested power headrooms for multiple carriers from a user equipment (UE), one requested power headroom for each carrier. Each requested power headroom may be indicative of transmit power usable by the UE for transmission on an associated carrier. The scheduler may also receive queue information indicative of data to transmit by the UE. The scheduler may redistribute the requested power headrooms across the multiple carriers (e.g., based on water filling or greedy filling) to obtain redistributed power headrooms for the multiple carriers. The scheduler may schedule the UE for data transmission on the uplink based on the redistributed power headrooms and the queue information. The scheduler may obtain and send at least one granted power headroom for at least one carrier to the UE.
    Type: Grant
    Filed: January 13, 2010
    Date of Patent: October 22, 2013
    Assignee: QUALCOMM Incorporated
    Inventors: Danlu Zhang, Pavan Kumar Vitthaladevuni, Ravi Agarwal, Jilei Hou, Bibhu P. Mohanty
  • Patent number: 8547860
    Abstract: This innovation relates to systems and methods for multiple carrier allocation in wireless communication networks, and more particularly to allocation and/or de-allocation of one or multiple carriers on the uplink to a high-speed uplink packet access user. A radio network controller can allocate uplink carriers to users based on a plurality of criteria, including but not limited to network loading, channel conditions, and so forth. The allocation messages can be transmitted to the user via layer three messages or layer one signaling.
    Type: Grant
    Filed: February 8, 2010
    Date of Patent: October 1, 2013
    Assignee: QUALCOMM Incorporated
    Inventors: Danlu Zhang, Aziz Gholmieh, Ravi Agarwal, Pavan Kumar Vitthaladevuni, Jilei Hou, Bibhu P. Mohanty
  • Patent number: 8547918
    Abstract: A method for providing multiple-user multiple-input and multiple-output in a high-speed packet access system is described. Channel quality indicators are received from a plurality of dual stream capable wireless communication devices. A preferred beam and a secondary beam are determined for each wireless communication device using the channel quality indicators. Wireless communication devices with preferred beams orthogonal to each other are paired. A wireless communication device pair is selected. Data streams for the selected wireless communication device pair are scheduled in the same transmission time interval using an orthogonal variable spreading factor code.
    Type: Grant
    Filed: November 16, 2010
    Date of Patent: October 1, 2013
    Assignee: Qualcomm Incorporated
    Inventors: Stefan Brueck, Josef J. Blanz, Pavan Kumar Vitthaladevuni
  • Patent number: 8537879
    Abstract: A method of wireless communication includes utilizing a first outer loop for single-stream transmissions when a requested PCI by a UE is within a first set. The utilizing the first outer loop includes utilizing a first outer loop margin to adjust a size of a transport block by a first backoff margin when the UE requests a PCI within the first set. The method further includes utilizing a second outer loop for single-stream transmissions when the requested PCI by the UE is within a second set different from the first set. The utilizing the second outer loop includes utilizing a second outer loop margin to adjust the size of the transport block by a second backoff margin when the UE requests a PCI within the second set.
    Type: Grant
    Filed: May 11, 2010
    Date of Patent: September 17, 2013
    Assignee: QUALCOMM Incorporated
    Inventors: Pavan Kumar Vitthaladevuni, Haitong Sun, Danlu Zhang, Jilei Hou
  • Patent number: 8521207
    Abstract: A method for wireless communications is provided. The method includes applying independent power controls to two or more carriers from a set of high speed packet access signals. The method includes monitoring power across the two or more carriers to determine power levels for the set of high speed packet access signals. The method also includes automatically adjusting at least one of the independent power controls in view of the determined power levels for the set of high speed packet access signals.
    Type: Grant
    Filed: February 8, 2010
    Date of Patent: August 27, 2013
    Assignee: QUALCOMM Incorporated
    Inventors: Danlu Zhang, Pavan Kumar Vitthaladevuni, Ravi Agarwal, Jilei Hou, Ozcan Ozturk
  • Patent number: 8514794
    Abstract: A method for wireless communications is provided. The method includes applying independent power controls to two or more carriers from a set of high speed packet access signals. The method includes monitoring power across the two or more carriers to determine power levels for the set of high speed packet access signals. The method also includes adjusting at least one of an open loop control, an inner loop control, or an outer loop control in view of the power levels for the set of packet access signals.
    Type: Grant
    Filed: March 16, 2010
    Date of Patent: August 20, 2013
    Assignee: QUALCOMM Incorporated
    Inventors: Danlu Zhang, Pavan Kumar Vitthaladevuni, Ravi Agarwal, Jilei Hou, Ozcan Ozturk, Arjun Bharadwaj, Sharad Deepak Sambhwani
  • Patent number: 8477734
    Abstract: Techniques for reporting acknowledgement (ACK) information and channel quality indication (CQI) information in a wireless communication system are described. A user equipment (UE) may be able to receive data from up to two cells with dual-cell operation. The UE may determine CQI information for a first cell, determine CQI information for a second cell, and send the CQI information for both cells on a feedback channel with a single channelization code. The UE may process a control channel from each cell and, if control information is received from the cell, may further process a data channel from the cell to receive data sent to the UE. The UE may determine ACK information for each cell based on processing results for the data and control channels from that cell. The UE may send the ACK information for both cells on the feedback channel with the single channelization code.
    Type: Grant
    Filed: March 24, 2009
    Date of Patent: July 2, 2013
    Assignee: QUALCOMM Incorporated
    Inventors: Sharad Deepak Sambhwani, Wei Zeng, Yibo Jiang, Lu Yuan, Mehmet Yavuz, Pavan Kumar Vitthaladevuni, Bibhu P. Mohanty, Danlu Zhang, Aziz Gholmieh, Arjun Bharadwaj
  • Publication number: 20130028102
    Abstract: A method for adjusting a received channel quality indicator is described. A channel quality indicator is received from a wireless communication device. A first transmission time interval for which the channel quality indicator was generated is determined. The received channel quality indicator is adjusted using an outer loop margin. The outer loop margin is dependent on a transmission mode of the first transmission time interval.
    Type: Application
    Filed: July 25, 2011
    Publication date: January 31, 2013
    Inventors: Pavan Kumar Vitthaladevuni, Haitong Sun, Sharad Deepak Sambhwani
  • Publication number: 20120213092
    Abstract: A method and system for improving the reception of uplink transmissions in a heterogeneous wireless communication system includes a high-power node such as a macro-cell and a low-power node such as a femto-cell or pico-cell. To address an uplink imbalance where a nearby low-power node power controls a UE such that uplink transmissions of an HSDPA control channel are poorly received at the serving cell, an RNC can instruct the UE to boost its uplink transmit power, remove the UE from soft handover, or disable power control of the UE by the low-power node. To address inter-cell interference, the RNC can limit the UE transmit power and/or enable the victim cell to suppress the interference. Further, a common control channel can be used to power control UEs outside of the convention set of UEs available for power control.
    Type: Application
    Filed: February 16, 2012
    Publication date: August 23, 2012
    Applicant: QUALCOMM Incorporated
    Inventors: Haitong Sun, Pavan Kumar Vitthaladevuni, Sharad Deepak Sambhwani, Jilei Hou, Bibhu Prasad Mohanty
  • Publication number: 20120201226
    Abstract: A Multi-Point HSDPA system may provide downlink aggregation from multiple cells for a single receive antenna UE without requiring an advanced Type 3i receiver, by providing switching-based scheduling from one of the cells based on channel conditions of the respective cells, as reported by the UE. For example, the UE may monitor the HS-SCCH from both cells so that it may decode the HS-DSCH in any particular TTI as data is scheduled. The UE may further transmit a CQI for each of the cells, so that scheduling decisions between the cells at each TTI may be dynamically made to provide the downlink packet from the better of the cells.
    Type: Application
    Filed: July 21, 2011
    Publication date: August 9, 2012
    Inventors: Sharad Deepak Sambhwani, Pavan Kumar Vitthaladevuni, Danlu Zhang, Jilei Hou
  • Publication number: 20120163185
    Abstract: A wireless communication system transmits in a High Speed Downlink Packet Access (HSDPA) by having a Radio Network Controller (RNC) assign portions of data to a first serving cell and a second serving cell for transmitting to a user equipment. The first serving cell transmits data on a first downlink carrier to the user equipment. The second serving cell, which is independent from the first serving cell, transmits data on a second downlink carrier to the user equipment. In an optional aspect, the RNC receives a measurement report from the user equipment on a first uplink carrier via at least one of the first serving cell and the second serving cell.
    Type: Application
    Filed: October 10, 2011
    Publication date: June 28, 2012
    Inventors: Danlu Zhang, Sharad Deepak Sambhwani, Jilei Hou, Pavan Kumar Vitthaladevuni
  • Publication number: 20120069798
    Abstract: A method, apparatus, processing system, and computer program product enable association of mis-aligned subframes from a first and second downlink with one another, such that a HARQ acknowledgment message including jointly encoded feedback for the respective subframes can be correctly interpreted by the corresponding cells. Here, an RNC may provide an RRC message to the UE to associate particular subframes with one another. Further, the RNC may provide NBAP messages to the cells transmitting the downlink signals, so that the cells can associate the HARQ acknowledgment message with the appropriate subframe. Still further, additional signaling provides for changing the set of associated subframes when needed due to a drift in the timing offset between cells.
    Type: Application
    Filed: August 12, 2011
    Publication date: March 22, 2012
    Applicant: QUALCOMM INCORPORATED
    Inventors: Pavan Kumar Vitthaladevuni, Haitong Sun, Danlu Zhang, Sharad Deepak Sambhwani, Jilei Hou
  • Publication number: 20110280197
    Abstract: A method for providing multiple-user multiple-input and multiple-output in a high-speed packet access system is described. Channel quality indicators are received from a plurality of dual stream capable wireless communication devices. A preferred beam and a secondary beam are determined for each wireless communication device using the channel quality indicators. Wireless communication devices with preferred beams orthogonal to each other are paired. A wireless communication device pair is selected. Data streams for the selected wireless communication device pair are scheduled in the same transmission time interval using an orthogonal variable spreading factor code.
    Type: Application
    Filed: November 16, 2010
    Publication date: November 17, 2011
    Applicant: QUALCOMM Incorporated
    Inventors: Stefan Brueck, Josef J. Blanz, Pavan Kumar Vitthaladevuni
  • Publication number: 20110176519
    Abstract: A method for signaling multiple-user multiple-input and multiple-output in a high speed packet access system is described. A multiple-user multiple-input and multiple-output parameter is determined. A message that includes the multiple-user multiple-input and multiple-output parameter is determined. The message is sent to a wireless device. The method may be performed by a user equipment, a Node B or a radio network controller.
    Type: Application
    Filed: November 15, 2010
    Publication date: July 21, 2011
    Inventors: Pavan Kumar Vitthaladevuni, Daniu Zhang, Rohit Kapoor, Jilei Hou, Stefan Brueck, Josef J. Blanz
  • Publication number: 20110176484
    Abstract: A method for providing multiple-user multiple-input and multiple-output in a high-speed packet access system is described. A channel quality indicator is received from a dual-stream-capable wireless communication device requesting a single-stream transmission at a first data rate. The first data rate is adjusted by an adaptive outer loop margin to obtain a second data rate. A data stream is transmitted to the wireless communication device using the second data rate. A positive-acknowledgement/negative-acknowledgement (ACK/NACK) is received from the wireless communication device. The adaptive outer loop margin is adjusted according to the received ACK/NACK.
    Type: Application
    Filed: November 15, 2010
    Publication date: July 21, 2011
    Inventors: Pavan Kumar Vitthaladevuni, Haitong Sun, Danlu Zhang, Vinay Chande, Stefan Brueck, Josef J. Blanz