Patents by Inventor Tushar R. Shah

Tushar R. Shah 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: 11184890
    Abstract: An interface circuit in an electronic device may contend for access to a shared communication channel on behalf of the electronic device and a recipient electronic device, where the access has a duration. Then, the electronic device may provide a schedule frame intended for the recipient electronic device that includes information that specifies one or more time slots during the duration that are associated with the recipient electronic device and one or more communication functions of the recipient electronic device in the one or more time slots. Moreover, the electronic device may provide a data frame with data intended for the recipient electronic device. In response, the electronic device may receive a response frame associated with the recipient electronic device, where the response frame is received during at least one of the one or more time slots.
    Type: Grant
    Filed: August 6, 2019
    Date of Patent: November 23, 2021
    Assignee: Apple Inc.
    Inventors: Daniel R. Borges, Oren Shani, Christiaan A. Hartman, Yong Liu, Charles F. Dominguez, Karthik R. Mekala, Tashbeeb Haque, Lawrie Kurian, Mete Fikirlier, Guoqing Li, Rajneesh Kumar, Ka Ho P. Poon, Brian B. Whitaker, Joseph Hakim, John A. Wilson, Tony Chi Wang Ng, Roopkumar Parthasarathy Rao, Curtis J. Schmidek, Shishir Gupta, Tushar R. Shah, Jacob H. Power, Bryan J. Follis, Anand Rajagopalan
  • Patent number: 10999798
    Abstract: An interface circuit in an electronic device (such as an access point) may provide a wake-up beacon to a recipient electronic device. During operation, the interface circuit may provide a wake-up beacon associated with a predefined sub-channel in one or more channels in a band of frequencies, where the wake-up beacon is for a wake-up radio in the recipient electronic device. Moreover, the wake-up beacon may be provided within an associated time interval, such as a keep-alive interval of the electronic device. In some embodiments, the wake-up beacon includes a field with channel information that specifies one or more second channels used by a main radio in the recipient electronic device. Alternatively or additionally, the wake-up beacon may include a field with service information that specifies one or more types of services and/or a field with information specifying a transmit power of the interface circuit.
    Type: Grant
    Filed: June 20, 2018
    Date of Patent: May 4, 2021
    Assignee: Apple Inc.
    Inventors: Guoqing Li, Yong Liu, Oren Shani, Christiaan A. Hartman, Xiaowen Wang, Christian W. Mucke, Tushar R. Shah, Jarkko L. Kneckt, Matthew L. Semersky, Yoel Boger, Josef Peery, Rajneesh Kumar
  • Patent number: 10924993
    Abstract: An interface circuit in an electronic device (such as an access point) may utilize a configurable wake-up-frame format. During operation, the interface circuit may receive a wake-up-radio (WUR)-setup request associated with a recipient electronic device, where the WUR-setup request specifies a proposed configurable wake-up-frame format. In response, the electronic device may determine the configurable wake-up-frame format to be used based at least in part on the proposed configurable wake-up-frame format. Then, the interface circuit may provide a WUR-setup response intended for the recipient electronic device, where the WUR-setup response specifies the configurable wake-up-frame format selected for use. Note that the configurable wake-up-frame format may specify a payload length in a wake-up frame and/or one or more operations of at least one of the recipient electronic device or the electronic device after the wake-up frame is transmitted by the electronic device.
    Type: Grant
    Filed: August 23, 2018
    Date of Patent: February 16, 2021
    Assignee: Apple Inc.
    Inventors: Jarkko L. Kneckt, Matthew L. Semersky, Christiaan A. Hartman, Oren Shani, Yong Liu, Xiaowen Wang, Tushar R. Shah, Yoel Boger, Rajneesh Kumar, Josef Peery, Christian W. Mucke, Guoqing Li
  • Patent number: 10638423
    Abstract: An interface circuit in an electronic device (such as an access point) may provide a group wake-up packet to a group of recipient electronic devices in a set of recipient electronic devices. During operation, the interface circuit may select the group in the set of recipient electronic devices, where the group includes at least one of the recipient electronic devices. Then, the interface circuit may provide the group wake-up packet for the recipient electronic devices in the group with information that specifies that a subset of the recipient electronic devices in the group transition from a low-power mode. For example, the information may include a bitmap that specifies the subset and an identifier of the group. Note that the electronic device may dynamically define the group. Alternatively, the recipient electronic devices in the group may be static.
    Type: Grant
    Filed: June 4, 2018
    Date of Patent: April 28, 2020
    Assignee: Apple Inc.
    Inventors: Guoqing Li, Yong Liu, Oren Shani, Xiaowen Wang, Christiaan A. Hartman, Matthew L. Semersky, Josef Peery, Yoel Boger, Tushar R. Shah, Rajneesh Kumar, Christian W. Mucke
  • Publication number: 20200059941
    Abstract: An apparatus such as a wireless communication device (UE) may include first circuitry configured to conduct wireless communications according to a first radio access technology (RAT) in a first frequency band and in a second frequency band, where the first RAT is a cellular RAT, the first frequency band is in an unlicensed spectrum, and the second frequency band is in a licensed spectrum. The apparatus may include second circuitry configured to conduct wireless communications according to a second RAT in the first frequency band, wherein the second RAT is a wireless local area network (WLAN) RAT. The apparatus may be configured to determine to perform a scan operation in the first frequency band using the first circuitry and, based on one or more transmissions by the second circuitry using the first frequency band, adjust one or more parameters for the scan measurement by the first circuitry. The cellular communications in the first frequency band may be LAA communications, for example.
    Type: Application
    Filed: October 28, 2019
    Publication date: February 20, 2020
    Inventors: Farouk Belghoul, Paul V. Flynn, Louie J. Sanguinetti, Bernd W. Adler, Christian W. Mucke, Joseph Hakim, Ronald W. Dimpflmaier, Matthias Sauer, Tushar R. Shah, Daniel R. Borges, Rafael L. Rivera-Barreto, Cesar Perez
  • Publication number: 20200053729
    Abstract: An interface circuit in an electronic device may contend for access to a shared communication channel on behalf of the electronic device and a recipient electronic device, where the access has a duration. Then, the electronic device may provide a schedule frame intended for the recipient electronic device that includes information that specifies one or more time slots during the duration that are associated with the recipient electronic device and one or more communication functions of the recipient electronic device in the one or more time slots. Moreover, the electronic device may provide a data frame with data intended for the recipient electronic device. In response, the electronic device may receive a response frame associated with the recipient electronic device, where the response frame is received during at least one of the one or more time slots.
    Type: Application
    Filed: August 6, 2019
    Publication date: February 13, 2020
    Inventors: Daniel R. Borges, Oren Shani, Christiaan A. Hartman, Yong Liu, Charles F. Dominguez, Karthik R. Mekala, Tashbeeb Haque, Lawrie Kurian, Mete Fikirlier, Guoqing Li, Rajneesh Kumar, Ka Ho P. Poon, Brian B. Whitaker, Joseph Hakim, John A. Wilson, Tony Chi Wang Ng, Roopkumar Parthasarathy Rao, Curtis J. Schmidek, Shishir Gupta, Tushar R. Shah, Jacob H. Power, Bryan J. Follis, Anand Rajagopalan
  • Patent number: 10462805
    Abstract: A wireless communication device (UE) includes a cellular processor configured to conduct wireless communications according to a first radio access technology (RAT) in a first frequency band and in a second frequency band, wherein the first RAT is a cellular RAT, the first frequency band is in an unlicensed spectrum, and the second frequency band is in a licensed spectrum. In some embodiments, the apparatus includes a wireless local area network (WLAN) processor configured to conduct wireless communications according to a second RAT in the first frequency band. In some embodiments, the cellular processor and the WLAN processor are configured to couple to a common antenna for communications in the first frequency band. In some embodiments, the cellular processor may notify the WLAN processor when it is scanning and/or when it is assigned secondary component carriers in the first frequency band. In some embodiments, the WLAN processor may notify the cellular processor when it is transmitting.
    Type: Grant
    Filed: September 21, 2017
    Date of Patent: October 29, 2019
    Assignee: Apple Inc.
    Inventors: Farouk Belghoul, Paul V. Flynn, Louie J. Sanguinetti, Bernd W. Adler, Christian W. Mucke, Joseph Hakim, Ronald W. Dimpflmaier, Matthias Sauer, Tushar R. Shah, Daniel R. Borges, Rafael L. Rivera-Barreto, Cesar Perez
  • Publication number: 20190082443
    Abstract: An electronic device that determines a transmission schedule is described. This electronic device may include an interface circuit that communicates with a recipient electronic device. During operation, the electronic device may receive a frame with scheduling-request information that is associated with the recipient electronic device. The scheduling-request information may include a buffer status report for persistent traffic, and the frame may be compatible with an IEEE 802.11 communication protocol. For example, the frame may include a scheduling-request management frame. Alternatively, the frame may include a data frame and the scheduling-request information may be included in a media access control (MAC) frame header, such as a high-efficiency (HE) variant high-throughput (HT) control header. Then, the electronic device may determine the transmission schedule based at least in part on the scheduling-request information.
    Type: Application
    Filed: September 11, 2018
    Publication date: March 14, 2019
    Inventors: Guoqing Li, Christiaan A. Hartman, Daniel R. Borges, Jarkko L. Kneckt, Oren Shani, Tushar R. Shah, Xiaowen Wang, Yong Liu, Christian W. Mucke, Joseph Hakim, Farouk Belghoul, Ayman F. Naguib, Karan Sanghi, Cahya Adiansyah Masputra
  • Publication number: 20190069231
    Abstract: An interface circuit in an electronic device (such as an access point) may utilize a configurable wake-up-frame format. During operation, the interface circuit may receive a wake-up-radio (WUR)-setup request associated with a recipient electronic device, where the WUR-setup request specifies a proposed configurable wake-up-frame format. In response, the electronic device may determine the configurable wake-up-frame format to be used based at least in part on the proposed configurable wake-up-frame format. Then, the interface circuit may provide a WUR-setup response intended for the recipient electronic device, where the WUR-setup response specifies the configurable wake-up-frame format selected for use. Note that the configurable wake-up-frame format may specify a payload length in a wake-up frame and/or one or more operations of at least one of the recipient electronic device or the electronic device after the wake-up frame is transmitted by the electronic device.
    Type: Application
    Filed: August 23, 2018
    Publication date: February 28, 2019
    Inventors: Jarkko L. Kneckt, Matthew L. Semersky, Christiaan A. Hartman, Oren Shani, Yong Liu, Xiaowen Wang, Tushar R. Shah, Yoel Boger, Rajneesh Kumar, Josef Peery, Christian W. Mucke, Guoqing Li
  • Publication number: 20190014541
    Abstract: An interface circuit in a device, e.g., an access point, may perform link adaptation. During operation, the interface circuit may provide a wake-up frame, e.g., a LP-WUR packet, associated with a channel in a band of frequencies, where the wake-up frame is intended for a wake-up radio in a recipient device. Then, the interface circuit may receive, from the recipient device, feedback information associated with a second channel in a second band of frequencies, where the feedback information is associated with a main radio in the recipient device. Based at least in part on the feedback information, the interface circuit may estimate one or more communication metrics associated with the channel in the band of frequencies. Moreover, based at least in part on the one or more communication metrics, the interface circuit may determine a data rate for use in communication via the channel in the band of frequencies.
    Type: Application
    Filed: June 20, 2018
    Publication date: January 10, 2019
    Inventors: Guoqing Li, Oren Shani, Yong Liu, Xiaowen Wang, Yoel Boger, Christiaan A. Hartman, Christian W. Mucke, Tushar R. Shah, Matthew L. Semersky, Josef Peery
  • Publication number: 20180376419
    Abstract: An interface circuit in an electronic device (such as an access point) may provide a wake-up beacon to a recipient electronic device. During operation, the interface circuit may provide a wake-up beacon associated with a predefined sub-channel in one or more channels in a band of frequencies, where the wake-up beacon is for a wake-up radio in the recipient electronic device. Moreover, the wake-up beacon may be provided within an associated time interval, such as a keep-alive interval of the electronic device. In some embodiments, the wake-up beacon includes a field with channel information that specifies one or more second channels used by a main radio in the recipient electronic device. Alternatively or additionally, the wake-up beacon may include a field with service information that specifies one or more types of services and/or a field with information specifying a transmit power of the interface circuit.
    Type: Application
    Filed: June 20, 2018
    Publication date: December 27, 2018
    Inventors: Guoqing Li, Yong Liu, Oren Shani, Christiaan A. Hartman, Xiaowen Wang, Christian W. Mucke, Tushar R. Shah, Jarkko L. Kneckt, Matthew L. Semersky, Yoel Boger, Josef Peery, Rajneesh Kumar
  • Patent number: 10158997
    Abstract: A wireless network may include devices that wirelessly transmit and receive packets. Each packet may include a preamble, a start-of-frame delimiter, a physical layer header, a sequence of symbols between the start-of-frame delimiter and the physical layer header, and a data payload. The sequence of symbols may have a pattern that is resistant to spoofing attacks. A receiving device may have a correlator that correlates known symbols against the symbols in the sequence using overlapping three-symbol-length correlation windows. Early arrival peaks in the output of the correlator may be used to correct time stamp information in the packets and late arrival peaks corresponding to spoofed signals from an attacker may be ignored. Time stamp information may be processed to determine ranges between transmitting and receiving devices.
    Type: Grant
    Filed: March 23, 2017
    Date of Patent: December 18, 2018
    Assignee: Apple Inc.
    Inventors: Alejandro J. Marquez, Tushar R. Shah, Mohit Narang, Indranil S. Sen, Shang-Te Yang
  • Publication number: 20180359704
    Abstract: An interface circuit in an electronic device (such as an access point) may provide a group wake-up packet to a group of recipient electronic devices in a set of recipient electronic devices. During operation, the interface circuit may select the group in the set of recipient electronic devices, where the group includes at least one of the recipient electronic devices. Then, the interface circuit may provide the group wake-up packet for the recipient electronic devices in the group with information that specifies that a subset of the recipient electronic devices in the group transition from a low-power mode. For example, the information may include a bitmap that specifies the subset and an identifier of the group. Note that the electronic device may dynamically define the group. Alternatively, the recipient electronic devices in the group may be static.
    Type: Application
    Filed: June 4, 2018
    Publication date: December 13, 2018
    Inventors: Guoqing Li, Yong Liu, Oren Shani, Xiaowen Wang, Christiaan A. Hartman, Matthew L. Semersky, Josef Peery, Yoel Boger, Tushar R. Shah, Rajneesh Kumar, Christian W. Mucke
  • Publication number: 20180092109
    Abstract: A wireless communication device (UE) includes a cellular processor configured to conduct wireless communications according to a first radio access technology (RAT) in a first frequency band and in a second frequency band, wherein the first RAT is a cellular RAT, the first frequency band is in an unlicensed spectrum, and the second frequency band is in a licensed spectrum. In some embodiments, the apparatus includes a wireless local area network (WLAN) processor configured to conduct wireless communications according to a second RAT in the first frequency band. In some embodiments, the cellular processor and the WLAN processor are configured to couple to a common antenna for communications in the first frequency band. In some embodiments, the cellular processor may notify the WLAN processor when it is scanning and/or when it is assigned secondary component carriers in the first frequency band. In some embodiments, the WLAN processor may notify the cellular processor when it is transmitting.
    Type: Application
    Filed: September 21, 2017
    Publication date: March 29, 2018
    Inventors: Farouk Belghoul, Paul V. Flynn, Louie J. Sanguinetti, Bernd W. Adler, Christian W. Mucke, Joseph Hakim, Ronald W. Dimpflmaier, Matthias Sauer, Tushar R. Shah, Daniel R. Borges, Rafael L. Rivera-Barreto, Cesar Perez
  • Publication number: 20170303127
    Abstract: A wireless network may include devices that wirelessly transmit and receive packets. Each packet may include a preamble, a start-of-frame delimiter, a physical layer header, a sequence of symbols between the start-of-frame delimiter and the physical layer header, and a data payload. The sequence of symbols may have a pattern that is resistant to spoofing attacks. A receiving device may have a correlator that correlates known symbols against the symbols in the sequence using overlapping three-symbol-length correlation windows. Early arrival peaks in the output of the correlator may be used to correct time stamp information in the packets and late arrival peaks corresponding to spoofed signals from an attacker may be ignored. Time stamp information may be processed to determine ranges between transmitting and receiving devices.
    Type: Application
    Filed: March 23, 2017
    Publication date: October 19, 2017
    Inventors: Alejandro J. Marquez, Tushar R. Shah, Mohit Narang, Indranil S. Sen, Shang-Te Yang
  • Patent number: 8150012
    Abstract: A communication system that enables a requesting station to receive information for the local time of the present situs of a target station. The communication system includes a time server that receives a request for the local time of the current situs of the target station. The time server may determine the present time of the target station by querying a location server for the present situs of the target station. The time server uses the situs information to obtain the local time to of the target station based on the present situs. The time information is transmitted to the requesting station for presentation to a user.
    Type: Grant
    Filed: July 9, 2007
    Date of Patent: April 3, 2012
    Assignee: Alcatel Lucent
    Inventor: Tushar R. Shah
  • Publication number: 20090016509
    Abstract: A communication system that enables a requesting station to receive information for the local time of the present situs of a target station. The communication system includes a time server that receives a request for the local time of the current situs of the target station. The time server may determine the present time of the target station by querying a location server for the present situs of the target station. The time server uses the situs information to obtain the local time to of the target station based on the present situs. The time information is transmitted to the requesting station for presentation to a user.
    Type: Application
    Filed: July 9, 2007
    Publication date: January 15, 2009
    Inventor: Tushar R. Shah