Patents by Inventor Sandip Sarkar

Sandip Sarkar 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: 7720501
    Abstract: An apparatus, system, and method efficiently manage reverse link resources by allowing a mobile station to select between transmitting a payload at a standard power level and transmitting a smaller payload at a boosted power level. The mobile station, therefore, can autonomously select a QoS (Quality of Service) level for physical layer packets. Based on reverse link transmission information received from a base station, the mobile station derives a reverse link transmission guideline defining the power levels and associated payloads for at least a standard service and boosted service. The mobile station selects a reverse link transmission power level from a plurality of power levels including at least a standard reverse link transmission power level associated with a standard payload size and a boosted reverse link transmission power level associated with a boosted payload size where the standard payload size is greater than the boosted payload size.
    Type: Grant
    Filed: January 9, 2007
    Date of Patent: May 18, 2010
    Assignee: Qualcomm Incorporated
    Inventors: Stein A. Lundby, Avinash Jain, Joseph P. Odenwalder, Sandip Sarkar, Tao Chen, Yongbin Wei
  • Publication number: 20100062783
    Abstract: Providing a coding scheme for wireless communication downlink reference signals is described herein. By way of example, a dedicated reference signal is mapped to resources of a wireless channel as a function of an identifier (ID) of a cell in which the reference signal is transmitted. The function can be similar to mapping functions employed for common reference signals, or can be distinct from such functions. As one example of the latter, a dedicated reference signal mapping function can be shifted in time or frequency with respect to the common reference signal mapping function. By employing a mapping function based on cell ID, noise caused by concurrent transmission of reference signals can be mitigated in a manner readily determined by terminals in a wireless network.
    Type: Application
    Filed: March 24, 2009
    Publication date: March 11, 2010
    Applicant: QUALCOMM INCORPORATED
    Inventors: Tao Luo, Juan Montojo, Peter Gaal, Sandip Sarkar
  • Publication number: 20100040004
    Abstract: Systems and methodologies are described that facilitate assigning resources for an anchor carrier and an additional carrier with a grant message. The grant message communicated with an anchor carrier can include resource information a plurality of carriers. Moreover, the systems and methodologies that facilitate identifying control information for an anchor carrier and/or an additional carrier based upon an operating mode, wherein the operating mode is a legacy mode or an extended mode. Based on the operating mode, particular resources associated with control regions are monitored for control information for respective anchor carrier(s) or additional carrier(s).
    Type: Application
    Filed: August 6, 2009
    Publication date: February 18, 2010
    Applicant: QUALCOMM INCORPORATED
    Inventors: Jelena M. Damnjanovic, Juan Montojo, Sandip Sarkar, Peter Gaal, Aamod D. Khandekar, Amir Farajidana
  • Publication number: 20100034303
    Abstract: Aspects describe communicating grant information in a multicarrier wireless communication system. The grant information can be transmitted to mobile devices that have single carrier capability and/or mobile devices that have multicarrier capability. Grant information can be sent in a legacy control region and/or a non-legacy control region.
    Type: Application
    Filed: August 6, 2009
    Publication date: February 11, 2010
    Applicant: QUALCOMM INCORPORATED
    Inventors: Jelena M. Damnjanovic, Juan Montojo, Sandip Sarkar, Peter Gaal, Aamod D. Khandekar, Amir Farajidana
  • Publication number: 20100035625
    Abstract: A method, an apparatus, and a computer program product operable in a wireless communication system are provided in which a pairing is determined between one or more uplink carriers and one or more downlink carriers. The one or more uplink carriers and the one or more downlink carriers include at least three carriers. On which carrier to exchange control information on one or more of the carriers is based on the pairing or an anchor carrier designation.
    Type: Application
    Filed: August 7, 2009
    Publication date: February 11, 2010
    Applicant: QUALCOMM INCORPORATED
    Inventors: Jelena M. Damnjanovic, Juan Montojo, Sandip Sarkar
  • Publication number: 20100034163
    Abstract: Multiple downlink (DL) and uplink (UL) carriers can enhance wireless communication between nodes and user equipment (UE). Among the carriers, it is beneficial to have some special, by configuration designated carriers to provide synchronization, system information, paging, data and control for multi-carrier enabled UEs. Thereby, overhead system information can be reduced. For instance, synchronization and paging for a certain cell are not provided on all carriers. A carrier can provide backward compatibility for single carrier UEs for access, synchronization, broadcast, and new control region within the data region of the legacy terminals. Coordination between nodes for selecting anchor carriers that mitigate interference and for transmit power control for non-anchor carriers provide further network performance advantages.
    Type: Application
    Filed: August 6, 2009
    Publication date: February 11, 2010
    Applicant: QUALCOMM INCORPORATED
    Inventors: Jelena M. Damnjanovic, Juan Montojo, Sandip Sarkar
  • Patent number: 7660282
    Abstract: Techniques for congestion control are disclosed. In one embodiment, a base station allocates a shared resource using a combination of zero or more individual grants and zero or more common grants, and generates a busy signal in response to loading conditions that exceed a pre-determined level. In another embodiment, a subset of transmitting mobile stations reduce their transmission rate in response to a busy signal. The subset may include autonomous transmission, commonly granted transmission, individually granted transmission, or any combination thereof. In various embodiments, rate adjustment may be probabilistic or deterministic. In one embodiment, a rate table is deployed, and a mobile station decreases or increases the transmission rate from one rate in the table to a lower or higher rate in the table, respectively, in response to the busy signal. Various other aspects are also presented.
    Type: Grant
    Filed: August 22, 2003
    Date of Patent: February 9, 2010
    Assignee: Qualcomm Incorporated
    Inventor: Sandip Sarkar
  • Patent number: 7630731
    Abstract: An apparatus, system, and method efficiently manage reverse link resources by allowing a mobile station to select between transmitting a payload at a standard power level and transmitting a smaller payload at a boosted power level. The mobile station, therefore, can autonomously select a QoS (Quality of Service) level for physical layer packets. Based on reverse link transmission information received from a base station, the mobile station derives a reverse link transmission guideline defining the power levels and associated payloads for at least a standard service and boosted service. The mobile station selects a reverse link transmission power level from a plurality of power levels including at least a standard reverse link transmission power level associated with a standard payload size and a boosted reverse link transmission power level associated with a boosted payload size where the standard payload size is greater than the boosted payload size.
    Type: Grant
    Filed: September 2, 2004
    Date of Patent: December 8, 2009
    Inventors: Stein A. Lundby, Avinash Jain, Joseph P. Odenwalder, Sandip Sarkar, Tao Chen, Yongbin Wei
  • Publication number: 20090285267
    Abstract: A wireless telecommunications system includes a base station, a plurality of remote stations, a first channel for general page messages containing paging information and broadcast databurst message references, and an auxiliary channel for broadcast databurst notification indicators for the purpose of increasing standby time in remote stations configured to receive broadcast databurst messages.
    Type: Application
    Filed: April 9, 2009
    Publication date: November 19, 2009
    Applicant: QUALCOMM INCORPORATED
    Inventors: Sandip Sarkar, Edward G. Tiedemann, JR., Jun Wang
  • Publication number: 20090279460
    Abstract: Techniques for bundling acknowledgement (ACK) information in a wireless communication system are described. In one design, a user equipment (UE) may receive multiple codewords in at least one downlink subframe. The UE may decode the multiple codewords and determine an ACK or a negative acknowledgement (NACK) for each codeword based on decoding result. The UE may bundle the ACKs and NACKs for the multiple codewords to obtain bundled ACK information. In one design, the UE may generate (i) a bundled ACK if ACKs are obtained for all codewords or (ii) a bundled NACK if a NACK is obtained for any codeword. The UE may send the bundled ACK information as feedback for the multiple codewords. The UE may receive retransmissions of the multiple codewords if a bundled NACK is sent and may receive new codewords if a bundled ACK is sent.
    Type: Application
    Filed: May 5, 2009
    Publication date: November 12, 2009
    Applicant: QUALCOMM INCORPORATED
    Inventor: Sandip Sarkar
  • Publication number: 20090279500
    Abstract: Certain aspects of the present disclosure relate to a method for sending control information to multiple user terminals that share the same resources in a Spatial Division Multiple Access (SDMA) wireless system. The control information can be transmitted from an access point over a physical downlink control channel (PDCCH) that is common for a plurality of user terminals. The overall PDCCH overhead can thus be reduced due to a smaller number of required PDCCH in the SDMA wireless system.
    Type: Application
    Filed: March 26, 2009
    Publication date: November 12, 2009
    Applicant: QUALCOMM Incorporated
    Inventors: Tao Luo, Juan Montojo, Peter Gaal, Sandip Sarkar, Xiaoxia Zhang
  • Publication number: 20090274100
    Abstract: Management of uplink resources in a wireless communication is presented. In one embodiment, management of uplink resources comprises receiving a multi-bit acknowledge (multi-bit A/N) that is available for uplink transmission and receiving other information that is available for uplink transmission along with the multi-bit A/N. Next, it is determined whether a condition has been met. If the condition has been met, an uplink message is created comprising the multi-bit A/N but dropping the other information. If the condition has not been met, an uplink message is created which jointly codes the multi-bit A/N and the other information. The uplink message is then transmitted to a receiver.
    Type: Application
    Filed: May 4, 2009
    Publication date: November 5, 2009
    Applicant: QUALCOMM INCORPORATED
    Inventors: Juan Montojo, Durga Prasad Malladi, Sandip Sarkar
  • Patent number: 7573853
    Abstract: Controlling transmission energy in a variable rate communication system that gates out portions of a frame in a predetermined and predicable fashion. In particular, the present invention describes a method and apparatus which identifies closed loop power control commands that have been generated erroneously based on portions of a frame that have been gated. The identified power control commands are ignored. In an alternative embodiment, if identification of the erroneous power control commands occurs after response measures have been taken, the transmitting station responds by setting the transmission energy back to the state it would have been in had the erroneous power control commands been identified prior to the response.
    Type: Grant
    Filed: April 10, 2003
    Date of Patent: August 11, 2009
    Assignee: QUALCOMM Incorporated
    Inventors: Ahmed Saifuddin, Sandip Sarkar, Edward G. Tiedemann, Jr.
  • Publication number: 20090180435
    Abstract: A method provides a wireless frame protocol. The method includes communicating a transmission interval that facilitates switching between a downlink portion and an uplink portion of a wireless communications channel. The method employs one or more guard periods during the transmission interval to mitigate overlap of transmitting frequencies between the downlink and uplink portions of the wireless communications channel.
    Type: Application
    Filed: January 6, 2009
    Publication date: July 16, 2009
    Applicant: QUALCOMM INCORPORATED
    Inventor: Sandip Sarkar
  • Publication number: 20090168922
    Abstract: Various methods and systems for efficiently performing the blind decoding of downlink signals is described. Several forms of arranging possible CCE combinations are examined and investigated. Based on PDCCH size estimation/information, CCE concatenations that are most likely (of limited sets) can be arrived at. Tree-based concatenations are also devised using largest CCE ordering to align smaller CCE sizes to similar boundaries. By such ordering, the search space for all possible CCE ordering and sizes can be reduced to an efficient tree. Set mapping between possible lnposelstartCCElnposelend/REs are also described using a first set to secondary and tertiary sets. Various other ordering and sorting schemes are also detailed that enable a blind decode of a PDCCH channel to be efficiently performed.
    Type: Application
    Filed: October 28, 2008
    Publication date: July 2, 2009
    Applicant: QUALCOMM Incorporated
    Inventors: Durga Prasad Malladi, Juan Montojo, Sandip Sarkar
  • Publication number: 20090143072
    Abstract: Systems and methods for utilizing paging group IDs and paging indicators are disclosed for PDCCH and PDSCH transmissions to mobile terminals in a mobile communication system. By use of the paging group IDs and paging indicators, various groups of mobile terminals, including subsets of those groups can be paged with reduced decoding requirements. Nesting of the grouping is exploited and packing of the PDCCH frame to accomplish efficient use is described.
    Type: Application
    Filed: October 28, 2008
    Publication date: June 4, 2009
    Applicant: QUALCOMM Incorporated
    Inventors: Juan Montojo, Byoung-Hoon Kim, Durga Prasad Malladi, Sandip Sarkar
  • Publication number: 20090129298
    Abstract: Systems and methodologies are described that facilitate efficiently indicating parameter(s) associated with a base station utilizing synchronization signals in a wireless communication environment. For instance, relative locations of a PSC and a SSC in a radio frame can be a function of a parameter. Further, a PSC sequence utilized to generate PSCs can be selected based upon a parameter. Moreover, inclusion or exclusion of PSCs from a radio frame can be a function of a parameter. Additionally or alternatively, pseudo random sequence mappings (e.g., to cell IDs, tone locations) can be a function of a parameter. Example parameters can be whether the base station is part of a TDD or a FDD system, whether the radio frame employs FS1 or FS2, whether the base station is associated with a macro or a femto cell, or whether the base station is associated with a unicast or a multicast system.
    Type: Application
    Filed: October 9, 2008
    Publication date: May 21, 2009
    Applicant: QUALCOMM Incorporated
    Inventors: Tao Luo, Durga Prasad Malladi, Juan Montojo, Peter Gaal, Sandip Sarkar
  • Publication number: 20090129259
    Abstract: Techniques for sending control information in a wireless communication system are described. In an aspect, a UE spreads control information across frequency with a DFT and across time with an orthogonal sequence to obtain output data for the control information. In one design, the UE receives codewords for N HARQ processes in N downlink subframes, determines an ACK value for each HARQ process, codes N ACK values for the N HARQ processes to obtain ACK information, generates output data for the ACK information, and sends the output data in one of M uplink subframes. In another aspect, first control information is processed based on a first coding and multiplexing scheme utilizing code division multiplexing in time and frequency domains. Second control information is processed based on a second coding and multiplexing scheme utilizing code division multiplexing in time domain and spreading in frequency domain.
    Type: Application
    Filed: August 12, 2008
    Publication date: May 21, 2009
    Applicant: QUALCOMM Incorporated
    Inventors: Durga Prasad Malladi, Byoung-Hoon Kim, Juan Montojo, Sandip Sarkar
  • Patent number: 7519106
    Abstract: A wireless telecommunications system includes a base station, a plurality of remote stations, a first channel for general page messages containing paging information and broadcast databurst message references, and an auxiliary channel for broadcast databurst notification indicators for the purpose of increasing standby time in remote stations configured to receive broadcast databurst messages.
    Type: Grant
    Filed: December 19, 2005
    Date of Patent: April 14, 2009
    Assignee: QUALCOMM Incorporated
    Inventors: Sandip Sarkar, Edward G. Tiedemann, Jr., Jun Wang
  • Publication number: 20090093222
    Abstract: Techniques for performing calibration and beamforming in a wireless communication system are described. In an aspect, a Node B may periodically perform calibration in each calibration interval with a set of UEs to obtain a calibration vector for the Node B. The Node B may apply the calibration vector to account for mismatches in the responses of the transmit and receive chains at the Node B. In another aspect, the Node B may perform beamforming to a UE by taking into account gain imbalance for multiple antennas at the UE. The Node B may determine a precoding matrix for beamforming by taking into account gain imbalance due to (i) different automatic gain control (AGC) gains for receive chains at the UE, (ii) different power amplifier (PA) gains for transmit chains at the UE, and/or (iii) different antenna gains for multiple antennas at the UE.
    Type: Application
    Filed: October 2, 2008
    Publication date: April 9, 2009
    Applicant: QUALCOMM Incorporated
    Inventor: Sandip Sarkar