Patents by Inventor Chirag Patel

Chirag Patel 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: 10631331
    Abstract: Methods, systems, and devices for wireless communication are described. A downlink control message type used for triggering uplink transmissions may convey additional information, including timing for uplink transmissions. The type or format of the control channel (e.g., physical downlink control channel (PDCCH) type or format) used to trigger an uplink transmission may also indicate a starting time or a time period, or both for the uplink transmission. In some cases, downlink control information (DCI) may indicate the function of a downlink control message that includes the DCI. Additionally, system information identified in a downlink control message may be used to determine a subframe length which, in some examples, may be used to determine whether or how long to monitor a discovery reference signal (DRS) subframe.
    Type: Grant
    Filed: April 20, 2017
    Date of Patent: April 21, 2020
    Assignee: QUALCOMM Incorporated
    Inventors: Arumugam Chendamarai Kannan, Chirag Patel, Tao Luo, Tamer Kadous
  • Patent number: 10616862
    Abstract: Methods, systems, and devices for wireless communication are described. The described techniques provide for transmitting, at a base station, a contention exempt broadcast paging message that includes partial paging information for a user equipment (UE), receiving a random access request message transmitted by a UE in response to the broadcast paging message, and transmitting a unicast paging message which includes complete paging information. The described techniques further provide for determining, at a base station, a first paging opportunity window (POW) and a second POW for a UE, performing a LBT procedure during the first POW, transmitting a broadcast paging message including partial paging information for the UE during the first POW, performing a second LBT procedure during the second POW, transmitting a unicast paging message to the UE during the second POW, the unicast paging message including complete paging information for the UE.
    Type: Grant
    Filed: April 11, 2019
    Date of Patent: April 7, 2020
    Assignee: QUALCOMM Incorporated
    Inventors: Chirag Patel, Tao Luo, Arumugam Chendamarai Kannan
  • Patent number: 10616912
    Abstract: Methods, systems, and devices for wireless communication are described. The payload size for uplink transmissions of unscheduled control information may vary and, in some cases, may be dynamically determined. A user equipment (UE) may determine a payload size or may select a payload size from a set of predetermined sizes. A base station may independently determine the same payload size or it may blindly detect the payload size upon receiving the uplink (UL) transmission. Or the base station may indicate the payload size to the UE. Additionally, UL grants issued to the UE may take one of several forms (e.g., different downlink control indicator formats), and characteristics of the grant may indicate information about resources assigned by the grant, including a location of the resources among various transmission opportunities or whether the grant is for multiple subframes.
    Type: Grant
    Filed: April 20, 2017
    Date of Patent: April 7, 2020
    Assignee: QUALCOMM Incorporated
    Inventors: Arumugam Chendamarai Kannan, Chirag Patel, Tao Luo, Tamer Kadous
  • Publication number: 20200093749
    Abstract: Capsule dosage forms that provide immediate release of active ingredients and have abuse deterrent properties. In particular, the dosage forms comprise at least one pharmaceutically active ingredient, a combination of hydrophilic gelling polymers, at least one organic acid, and at least one disintegrant.
    Type: Application
    Filed: September 18, 2019
    Publication date: March 26, 2020
    Inventors: Tsz Chung Lai, Rebecca Sue Walker, Chirag Patel, Jaehan Park
  • Patent number: 10595327
    Abstract: Techniques for managing access to a shared communication medium are disclosed. Scheduling grants may be sent to different access terminals for different sets of resources for uplink transmission on the communication medium. A series of re-contention gaps may be scheduled for access terminal contention within or between the different sets of resources. Uplink and downlink transmission on the communication medium may be silenced during each of the series of re-contention gaps. Moreover, an access terminal may receive a scheduling grant that allocates a set of resources to the access terminal for uplink transmission on a communication medium and contend for access to the communication medium based on the scheduling grant. The access terminal may then selectively transmit uplink traffic over the allocated set of resources based on the contending.
    Type: Grant
    Filed: April 12, 2019
    Date of Patent: March 17, 2020
    Assignee: QUALCOMM Incorporated
    Inventors: Ahmed Sadek, Nachiappan Valliappan, Tamer Kadous, Chirag Patel, Tao Luo
  • Publication number: 20200057314
    Abstract: The present disclosure relates to trial scleral lenses, and the resulting scleral lenses, designed for the asymmetric shape of the sclera and/or its chiral properties. In some embodiments, the scleral lenses are also designed for the specific asymmetry associated with different scleral diameters. In addition, as discussed herein, the scleral shape can vary with different conditions of the eye. By designing a set of trial scleral lenses that takes into account these different asymmetric properties of the sclera, a clinician can be more efficient, fitting more eyes with fewer subsequent modifications. The resulting lenses will also achieve a better fit.
    Type: Application
    Filed: October 25, 2019
    Publication date: February 20, 2020
    Inventors: Karen G. CARRASQUILLO, Chirag PATEL, Crystal REMINGTON, Alan KWOK, Deborah S. JACOBS
  • Patent number: 10548131
    Abstract: A method and apparatus for wireless communication in the unlicensed spectrum between an eNB and UEs having different bandwidths, e.g., between a narrowband UE and a wideband eNB. A base station apparatus performs an LBT procedure at a beginning of frames and transmits a plurality of repetitions of a transmission. When the plurality of repetitions span multiple frames and the LBT procedure is not successful for a first frame, the base station drops or postpones at least one repetition in the first frame until a second frame when the LBT procedure is successful. A UE receives the plurality of repetitions and may combine a plurality of repetitions across multiple frames. The UE may determine whether the base station drops the at least one repetition in the first frame or postpones the at least one repetition in the first frame until a second frame.
    Type: Grant
    Filed: June 27, 2017
    Date of Patent: January 28, 2020
    Assignee: QUALCOMM Incorporated
    Inventors: Srinivas Yerramalli, Tamer Kadous, Chih-Hao Liu, Chirag Patel, Alberto Rico Alvarino
  • Patent number: 10547494
    Abstract: This disclosure includes methods, systems, and devices for wireless communication. A repetition of symbols may be used to increase a device's ability to synchronize and communicate using unlicensed spectrum. For example, a base station may schedule a frame that includes repetitions, in time or frequency, of a control or data signal. After performing a listen-before-talk (LBT) procedure, the base station may broadcast or transmit the frame to one or more devices, such as a user equipment (UE). For instance, the frame may include repetitions of a discovery reference signal (DRS), and be broadcast by the base station to enable synchronization by the UE. In other examples, the signal may include repetitions of a cell-specific reference signal (CRS), and a UE may identify a start of a transmission opportunity using the CRSs. Other signals, such as downlink control and shared channels, may be repeated within a frame in a similar manner.
    Type: Grant
    Filed: September 6, 2017
    Date of Patent: January 28, 2020
    Assignee: QUALCOMM Incorporated
    Inventors: Chih-Hao Liu, Chirag Patel, Srinivas Yerramalli, Tamer Kadous
  • Patent number: 10542444
    Abstract: Certain aspects of the present disclosure relate to a methods and apparatus for wireless communication. In one aspect, a method of wireless communication comprises receiving, by a long term evolution unlicensed (LTE-U) device, a plurality of signals from an access point on an unlicensed communication spectrum. The method further comprises determining, by the device, whether a signal of the plurality of signals comprises a discovery signal. The method further comprises monitoring a radio link based on, the signal if the signal is determined to comprise the discovery signal.
    Type: Grant
    Filed: January 26, 2017
    Date of Patent: January 21, 2020
    Assignee: QUALCOMM Incorporated
    Inventors: Andrei Radulescu, Tao Luo, Chirag Patel
  • Patent number: 10542543
    Abstract: A method and apparatus for wireless communication in the unlicensed spectrum between an eNB and UEs having different bandwidths, e.g., between a narrowband UE and a wideband eNB. A user equipment apparatus segments an uplink duration in each frame into multiple transmission units for each frequency, wherein a frame comprises an integer number of the transmission units. The apparatus transmits uplink communication based on the multiple transmission units, wherein each transmission unit comprises at least one on period and at least one off period corresponding to each of a plurality of frequencies, wherein during an on period the UE transmits uplink communication on the corresponding frequency and during an off period the UE refrains from transmitting uplink communication on the corresponding frequency. Each transmission unit may comprise multiple on periods and multiple off periods. The on/off periods may be configured by a base station or specified for each frame type.
    Type: Grant
    Filed: June 27, 2017
    Date of Patent: January 21, 2020
    Assignee: QUALCOMM Incorporated
    Inventors: Srinivas Yerramalli, Tamer Kadous, Chih-Hao Liu, Chirag Patel, Alberto Rico Alvarino
  • Patent number: 10542436
    Abstract: Methods, systems, and devices for wireless communication are described. A user equipment (UE) and base station may communicate using narrow band internet of things (NB-IoT) techniques or enhanced machine type communication (eMTC) in unlicensed spectrum. The UE may be an eMTC device or another device capable of communication without user direction. The UE may identify a geographic region and select a communication mode that is consistent with regulatory restrictions in that region. For example, in some cases, the communication mode may be based on using time division duplexing (TDD), using frequency hopping, or performing a listen-before-talk (LBT) procedure at the base station. A frame structure for TDD may include LBT subframes, uplink portions, downlink portions, and special subframes for switching. The base station may perform LBT procedures in the LBT subframes. If frequency hopping is enabled, a configurable number of TDD frames may be grouped into a hopping frame block.
    Type: Grant
    Filed: July 7, 2017
    Date of Patent: January 21, 2020
    Assignee: QUALCOMM Incorporated
    Inventors: Chih-Hao Liu, Srinivas Yerramalli, Chirag Patel, Tamer Kadous, Hao Xu
  • Patent number: 10459249
    Abstract: The present disclosure relates to trial scleral lenses, and the resulting scleral lenses, designed for the asymmetric shape of the sclera and/or its chiral properties. In some embodiments, the scleral lenses are also designed for the specific asymmetry associated with different scleral diameters. In addition, as discussed herein, the scleral shape can vary with different conditions of the eye. By designing a set of trial scleral lenses that takes into account these different asymmetric properties of the sclera, a clinician can be more efficient, fitting more eyes with fewer subsequent modifications. The resulting lenses will also achieve a better fit.
    Type: Grant
    Filed: December 6, 2017
    Date of Patent: October 29, 2019
    Assignee: Boston Foundation for Sight
    Inventors: Karen G. Carrasquillo, Chirag Patel, Crystal Remington, Alan Kwok, Deborah S. Jacobs
  • Patent number: 10461797
    Abstract: Methods, systems, and devices for wireless communication are described. Resources for narrowband communication in an unlicensed radio frequency spectrum band may be configured and allocated based on resource availability, regulatory constraints, and device capability or category. A narrowband wireless device, such as a machine type communication device or other relatively low complexity device, may communicate using one or more narrowband carriers, which may occupy between one tone and multiple resource blocks in an unlicensed spectrum band (e.g., any number of resources between one (1) tone and multiple resource blocks (RBs)). Different device types may thus be configured differently as they move between geographic regions. The base station may then communicate with the narrowband mobile device based on the resource allocation and the carrier configuration.
    Type: Grant
    Filed: January 8, 2019
    Date of Patent: October 29, 2019
    Assignee: QUALCOMM Incorporated
    Inventors: Chih-Hao Liu, Srinivas Yerramalli, Chirag Patel, Tamer Kadous, Hao Xu
  • Publication number: 20190315691
    Abstract: The present invention provides an improved process for the preparation of N-protected ((3S,4R)-4-(4-fluorophenyl)piperidin-3-yl)methanol (compound (A)) and further its transformation to Paroxetine and its pharmaceutically acceptable salts. The process comprises reaction of compound (II) with amido-malonate compound (C) in the presence of a chiral catalyst and optionally a dehydrating agent to obtain compound (B); followed by reduction of (B) in the presence of a reducing agent to provide compound (A).
    Type: Application
    Filed: September 2, 2016
    Publication date: October 17, 2019
    Applicant: PIRAMAL ENTERPRISES LIMITED
    Inventors: Raghavendar Rao MORTHALA, Arnab ROY, Tapas MAITY, Baswaraj PATLOLLA, Murali RAJAPPA, Nilanjan MAJUMDER, Chirag PATEL, Dhileepkumar KRISHNAMURTHY, Santhosh Reddy JANGARI, Anant JAGTAP, Phani Kumar MANNEM, Pulendarreddy ARWAL
  • Patent number: 10433291
    Abstract: Methods, systems, and devices for wireless communication are described. A user equipment (UE) may monitor a neighbor cell and report the result to a serving base station. Based on the report, the serving base station may identify an estimated discovery reference signal (DRS) transmission window of the neighbor cell. In some cases, the UE may estimate and report parameters of the neighbor DRS transmission window, and in other cases, the UE may make a measurement report and the base station may infer DRS transmission window parameters. The base station may then provide the UE with a DRS measurement timing configuration (DMTC) based on the estimated parameters of the neighbor cell so that the UE may monitor the neighbor cell and the serving cell in an efficient manner. For example, the UE may conserve battery life by refraining from monitoring DRS during periods when a DRS transmission is not likely.
    Type: Grant
    Filed: February 23, 2017
    Date of Patent: October 1, 2019
    Assignee: QUALCOMM Incorporated
    Inventors: Andrei Radulescu, Chirag Patel, Tao Luo, Arumugam Chendamarai Kannan
  • Publication number: 20190272696
    Abstract: Existing currency validation (CVAL) devices, systems, and methods are too slow, costly, intrusive, and/or bulky to be routinely used in common transaction locations (e.g., at checkout, at an automatic teller machine, etc.). Presented herein are devices, systems, and methods to facilitate optical validation of documents, merchandise, or currency at common transaction locations and to do so in an obtrusive and convenient way. More specifically, the present invention embraces a validation device that may be used alone or integrated within a larger system (e.g., point of sale system, kiosk, etc.). The present invention also embraces methods for currency validation using the validation device, as well as methods for improving the quality and consistency of data captured by the validation device for validation.
    Type: Application
    Filed: May 16, 2019
    Publication date: September 5, 2019
    Inventors: Erik Van Horn, Gennady Germaine, Christopher Allen, David Ryder, Paul Poloniewicz, Kevin Saber, Sean Philip Kearney, Edward Hatton, Edward C. Bremer, Michael Vincent Miraglia, Robert Pierce, William Ross Rapoport, James Vincent Guiheen, Chirag Patel, Patrick Anthony Giordano, Timothy Good, Gregory Rueblinger
  • Patent number: 10405262
    Abstract: Techniques are described for wireless communication. A method for wireless communication at a user equipment (UE) includes receiving an instance of a discovery reference signal (DRS) on a beam over a shared radio frequency spectrum band; determining a public land mobile network identifier (PLMN ID) based at least in part on a time-frequency location of the instance of the DRS; and selectively performing a random access procedure based at least in part on the determined PLMN ID. A method for wireless communication at a base station includes transmitting an instance of a DRS on a beam over a shared radio frequency spectrum band; and transmitting a PLMN ID based at least in part on a time-frequency location of the DRS.
    Type: Grant
    Filed: August 16, 2017
    Date of Patent: September 3, 2019
    Assignee: QUALCOMM Incorporated
    Inventors: Arumugam Chendamarai Kannan, Andrei Dragos Radulescu, Chirag Patel, Tamer Kadous
  • Publication number: 20190239243
    Abstract: Techniques for managing access to a shared communication medium are disclosed. Scheduling grants may be sent to different access terminals for different sets of resources for uplink transmission on the communication medium. A series of re-contention gaps may be scheduled for access terminal contention within or between the different sets of resources. Uplink and downlink transmission on the communication medium may be silenced during each of the series of re-contention gaps. Moreover, an access terminal may receive a scheduling grant that allocates a set of resources to the access terminal for uplink transmission on a communication medium and contend for access to the communication medium based on the scheduling grant. The access terminal may then selectively transmit uplink traffic over the allocated set of resources based on the contending.
    Type: Application
    Filed: April 12, 2019
    Publication date: August 1, 2019
    Inventors: Ahmed SADEK, Nachiappan VALLIAPPAN, Tamer KADOUS, Chirag PATEL, Tao LUO
  • Publication number: 20190239190
    Abstract: Methods, systems, and devices for wireless communication are described. The described techniques provide for transmitting, at a base station, a contention exempt broadcast paging message that includes partial paging information for a user equipment (UE), receiving a random access request message transmitted by a UE in response to the broadcast paging message, and transmitting a unicast paging message which includes complete paging information. The described techniques further provide for determining, at a base station, a first paging opportunity window (POW) and a second POW for a UE, performing a LBT procedure during the first POW, transmitting a broadcast paging message including partial paging information for the UE during the first POW, performing a second LBT procedure during the second POW, transmitting a unicast paging message to the UE during the second POW, the unicast paging message including complete paging information for the UE.
    Type: Application
    Filed: April 11, 2019
    Publication date: August 1, 2019
    Inventors: Chirag Patel, Tao Luo, Arumugam Chendamarai Kannan
  • Patent number: 10368305
    Abstract: Methods, systems, and devices for wireless communication are described. A user equipment (UE) may attempt to access a network at a local area network access point without prior context information. The access point may be a hotspot operating in unlicensed spectrum according to a Long Term Evolution (LTE)-based standard. The UE may be unable to determine if it is authorized to access the network, so the UE may attempt to obtain system information that provides a list of service providers supported by the network. The UE may then determine whether it has credentials for a supported service provider, and the UE may access the network using those credentials when a supported service provider is recognized. Other broadcast messages may provide information about system information for supported service providers. A UE that is unable to access the network using stored credentials may attempt access using a random access channel procedure.
    Type: Grant
    Filed: March 21, 2017
    Date of Patent: July 30, 2019
    Assignee: QUALCOMM Incorporated
    Inventors: Andrei Dragos Radulescu, Tao Luo, Chirag Patel, Miguel Griot, Manu Sharma, Tamer Kadous, Rajat Prakash