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).
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Patent number: 8670376Abstract: 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: GrantFiled: August 6, 2009Date of Patent: March 11, 2014Assignee: QUALCOMM IncorporatedInventors: Jelena M. Damnjanovic, Juan Montojo, Sandip Sarkar, Peter Gaal, Aamod D. Khandekar, Amir Farajidana
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Publication number: 20140029550Abstract: Systems and techniques for communications include forming a data packet, selecting a plurality of transmission parameters for the data packet, generating information having one of a plurality of codes identifying the transmission parameters, and transmitting the data packet on a first channel and the information on a second channel. It is emphasized that this abstract is provided to comply with the rules requiring an abstract which will allow a searcher or other reader to quickly ascertain the subject matter of the technical disclosure. It is submitted with the understanding that it will not be used to interpret or limit the scope or the meaning of the claims.Type: ApplicationFiled: September 30, 2013Publication date: January 30, 2014Applicant: QUALCOMM IncorporatedInventors: Joseph P. Odenwalder, Yongbin Wei, Edward G. Tiedemann, JR., Stein A. Lundby, David Puig-Oses, Sandip Sarkar
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Patent number: 8634333Abstract: 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: GrantFiled: May 5, 2009Date of Patent: January 21, 2014Assignee: QUALCOMM IncorporatedInventor: Sandip Sarkar
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Patent number: 8600413Abstract: 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: GrantFiled: October 28, 2008Date of Patent: December 3, 2013Assignee: QUALCOMM IncorporatedInventors: Juan Montojo, Byoung-Hoon Kim, Durga Prasad Malladi, Sandip Sarkar
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Publication number: 20130315051Abstract: 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: ApplicationFiled: August 2, 2013Publication date: November 28, 2013Applicant: QUALCOMM IncorporatedInventors: Durga Prasad Malladi, Byoung-Hoon Kim, Juan Montojo, Sandip Sarkar
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Patent number: 8547916Abstract: Systems and techniques for communications include forming a data packet, selecting a plurality of transmission parameters for the data packet, generating information having one of a plurality of codes identifying the transmission parameters, and transmitting the data packet on a first channel and the information on a second channel. It is emphasized that this abstract is provided to comply with the rules requiring an abstract which will allow a searcher or other reader to quickly ascertain the subject matter of the technical disclosure. It is submitted with the understanding that it will not be used to interpret or limit the scope or the meaning of the claims.Type: GrantFiled: September 21, 2010Date of Patent: October 1, 2013Assignee: QUALCOMM IncorporatedInventors: Joseph P. Odenwalder, Yongbin Wei, Edward G. Tiedemann, Jr., Stein A. Lundby, David Puig-Oses, Sandip Sarkar
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Patent number: 8503375Abstract: 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: GrantFiled: August 12, 2008Date of Patent: August 6, 2013Assignee: QUALCOMM IncorporatedInventors: Durga Prasad Malladi, Byoung-Hoon Kim, Juan Montojo, Sandip Sarkar
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Patent number: 8489949Abstract: Embodiments disclosed herein address the need in the art for reduced overhead control with the ability to adjust transmission rates as necessary. In one aspect, a first signal indicates an acknowledgement of a decoded subpacket and whether or not a rate control command is generated, and a second signal conditionally indicates the rate control command when one is generated. In another aspect, a grant may be generated concurrently with the acknowledgement. In yet another aspect, a mobile station monitors the first signal, conditionally monitors the second signal as indicated by the first signal, and may monitor a third signal comprising a grant. In yet another aspect, one or more base stations transmit one or more of the various signals. Various other aspects are also presented. These aspects have the benefit of providing the flexibility of grant-based control while utilizing lower overhead when rate control commands are used, thus increasing system utilization, increasing capacity and throughput.Type: GrantFiled: February 17, 2004Date of Patent: July 16, 2013Assignee: QUALCOMM IncorporatedInventors: Edward G. Tiedemann, Jr., Aleksandar Damnjanovic, Avinash Jain, Durga P. Malladi, David Puig Oses, Peter Gaal, Stein Lundby, Sandip Sarkar, Tao Chen, Yongbin Wei, Serge Willenegger
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Patent number: 8463310Abstract: 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: GrantFiled: March 30, 2010Date of Patent: June 11, 2013Assignee: QUALCOMM IncorporatedInventors: Stein A. Lundby, Avinash Jain, Joseph P. Odenwalder, Sandip Sarkar, Tao Chen, Yongbin Wei
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Patent number: 8412257Abstract: Techniques for selecting transmit formats in a manner to account for the degrees of resource reuse for multiple data streams sent simultaneously from multiple antennas are described. The degree of resource reuse for each data stream indicates the amount of reuse of resources (e.g., orthogonal codes or subcarriers) observed by that stream. Interference estimates for the multiple data streams are derived based on an initial resource assignment. The degrees of resource reuse are determined based on the interference estimates and are used to derive at least one correction factor. At least one transmit format is then selected for the data streams using the at least one correction factor. Each data stream is associated with a transmit format that indicates the amount of resources to use for the data stream and other parameters. Resources are assigned to each data stream in accordance with its transmit format.Type: GrantFiled: June 16, 2011Date of Patent: April 2, 2013Assignee: QUALCOMM IncorporatedInventors: Byoung-Hoon Kim, Durga Prasad Malladi, Sandip Sarkar
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Patent number: 8391249Abstract: An apparatus includes a first encoder for receiving a plurality of symbol streams for respective ones of a plurality of mobile stations and encoding each of the symbol streams with one of a plurality of covering sequences to form a plurality of covered sequences. The apparatus further includes a summer for summing the plurality of covered sequences to form a first Code Division Multiplexed (CDM) signal. In addition, the apparatus includes a second encoder for covering the first CDM signal with a covering sequence to form a first covered CDM signal. A system and method for multiplexing plurality of symbol streams are also provided.Type: GrantFiled: June 30, 2003Date of Patent: March 5, 2013Assignee: QUALCOMM IncorporatedInventors: Joseph P. Odenwalder, Sandip Sarkar
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Patent number: 8374109Abstract: 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: GrantFiled: March 26, 2009Date of Patent: February 12, 2013Assignee: QUALCOMM IncorporatedInventors: Tao Luo, Juan Montojo, Peter Gaal, Sandip Sarkar, Xiaoxia Zhang
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Patent number: 8315273Abstract: Bandwidth segmentation according to a one carrier approach conveyed in a main information block (MIB) supports a plurality of contiguous frequency segments with one frequency segment seen by legacy terminals and the whole bandwidth seen by advanced terminals. Control regions either within data regions of a legacy frequency band segment or with one or two contiguous advanced frequency band segments separated by the legacy frequency band segment are communicated to advanced terminals in system information blocks (SIBs) or conveyed to an advanced UE by dedicated signaling.Type: GrantFiled: December 11, 2009Date of Patent: November 20, 2012Assignee: Qualcomm IncorporatedInventors: Jelena M. Damnjanovic, Juan Montojo, Sandip Sarkar
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Publication number: 20120263134Abstract: 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: ApplicationFiled: June 21, 2012Publication date: October 18, 2012Applicant: QUALCOMM IncorporatedInventors: Durga Prasad Malladi, Juan Montojo, Sandip Sarkar
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Publication number: 20120218943Abstract: Techniques for sending control information in a wireless communication system are described. A control segment may include L?1 tiles, and each tile may include a number of transmission units. A number of control resources may be defined and mapped to the transmission units for the control segment. For symmetric mapping, multiple sets of S?1 control resources may be formed, and each batch of L consecutive sets of S control resources may be mapped to S transmission units at the same location in the L tiles. For localized mapping, S>1, and each set of S control resources may be mapped to a cluster of S adjacent transmission units in one tile. For distributed mapping, S=1, and each control resource may be mapped to one transmission unit in one tile. For diversity, each control resource may be mapped to multiple (e.g., three) transmission units in at least one tile.Type: ApplicationFiled: May 7, 2012Publication date: August 30, 2012Applicant: QUALCOMM INCORPORATEDInventors: Aamod Khandekar, Alexei Gorokhov, Naga Bhushan, Sandip Sarkar, Ravi Palanki
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Patent number: 8238475Abstract: 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: GrantFiled: October 28, 2008Date of Patent: August 7, 2012Assignee: QUALCOMM IncorporatedInventors: Durga Prasad Malladi, Juan Montojo, Sandip Sarkar
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Patent number: 8229423Abstract: Methods and apparatus for assigning, identifying and controlling broadcast transmissions are disclosed. A broadcast flow is assigned to a broadcast logical channel of the physical resources of a wireless communication channel. A broadcast channel control message indicative of parameters of the broadcast logical channel is generated. Upon receipt, the broadcast channel control message is processed and used to accordingly process the received broadcast transmission.Type: GrantFiled: August 17, 2007Date of Patent: July 24, 2012Assignee: QUALCOMM IncorporatedInventors: Sandip Sarkar, Aamod Khandekar, Tamer Kadous
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Patent number: 8201039Abstract: Embodiments disclosed herein address the need in the art for reduced overhead control with the ability to adjust transmission rates as necessary. In one aspect, a first signal indicates an acknowledgement of a decoded subpacket and whether or not a rate control command is generated, and a second signal conditionally indicates the rate control command when one is generated. In another aspect, a grant may be generated concurrently with the acknowledgement. In yet another aspect, a mobile station monitors the first signal, conditionally monitors the second signal as indicated by the first signal, and may monitor a third signal comprising a grant. In yet another aspect, one or more base stations transmit one or more of the various signals. Various other aspects are also presented. These aspects have the benefit of providing the flexibility of grant-based control while utilizing lower overhead when rate control commands are used, thus increasing system utilization, increasing capacity and throughput.Type: GrantFiled: May 10, 2007Date of Patent: June 12, 2012Assignee: QUALCOMM IncorporatedInventors: Edward G. Tiedemann, Jr., Aleksandar Damnjanovic, Avinash Jain, Durga P. Malladi, David Puig Oses, Peter Gaal, Stein Lundby, Sandip Sarkar, Tao Chen, Yongbin Wei, Serge Willenegger
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Patent number: 8199696Abstract: Method and apparatus for power control in a packet-data switched communication system by adapting a transmission energy setpoint to transmission quality and adjusting the retransmission energy setpoint accordingly. In one embodiment, the retransmission energy setpoint is adjusted as a function of retransmission quality.Type: GrantFiled: March 29, 2001Date of Patent: June 12, 2012Assignee: QUALCOMM IncorporatedInventors: Sandip Sarkar, Jack M. Holtzman
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Patent number: 8194719Abstract: 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: GrantFiled: April 9, 2009Date of Patent: June 5, 2012Assignee: QUALCOMM IncorporatedInventors: Sandip Sarkar, Edward G. Tiedemann, Jr., Jun Wang