Patents by Inventor Mingming Cai

Mingming Cai 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).

  • Publication number: 20200383097
    Abstract: A UE may be configured to select narrower or wider beams that may be suitable for use with a current UE mobility, scattering environment, etc. The UE may track changes to an identified beam of a certain width, and so may recover from tracking or other radio link failures by switching to a beam that is spatially adjacent or to a beam of a different width. The UE may identify a first beam associated with a first beam width based on at least one reference signal received by the UE. The UE may further determine a set of beams based on the first beam width that is associated with the identified first beam, and the determined set of beams may include at least one beam corresponding to the first beam width. The UE may further measure respective channel qualities associated with each beam of the determined set of beams.
    Type: Application
    Filed: January 28, 2020
    Publication date: December 3, 2020
    Inventors: Mihir Vijay LAGHATE, Raghu Narayan CHALLA, Jun ZHU, Mingming CAI, Yong LI, Ruhua HE
  • Publication number: 20200374882
    Abstract: Methods and systems for determining transmission power levels according to signal types and RF exposure limits. An example method generally includes determining a first transmission power for transmitting a first type of uplink (UL) signal, determining a second transmission power for transmitting a second type of UL signal based on the first transmission power, and transmitting at least one of the first UL signal according to the first transmission power or the second UL signal according to the second transmission power.
    Type: Application
    Filed: May 12, 2020
    Publication date: November 26, 2020
    Inventors: Mingming CAI, Junsheng HAN, Raghu Narayan CHALLA, Tienyow LIU, Jing LIN, Jagadish NADAKUDUTI, Lin LU, Farhad MESHKATI
  • Publication number: 20200374818
    Abstract: Certain aspects of the present disclosure relate to beam selection. An example method generally includes selecting, from a plurality of beams, a beam for uplink transmission during a particular time interval, the selecting being based on a transmission power and a radio frequency (RF) exposure for each of the plurality of beams and transmitting at least one uplink signal using the selected beam during the particular time interval.
    Type: Application
    Filed: April 28, 2020
    Publication date: November 26, 2020
    Inventors: Mingming CAI, Tienyow LIU, Raghu Narayan CHALLA, Jing LIN, Junsheng HAN
  • Patent number: 10819405
    Abstract: A method for managing beam squint in a phased antenna array system operating at millimeter wavelengths using carrier aggregation includes determining a minimum array gain threshold, determining an upper bound for a fractional bandwidth for a fixed number of antennas, and constructing a codebook with a predetermined coverage range based on at least one of an angle of arrival or an angle of departure and further based on the upper bound. The method further includes performing carrier aggregation for the fixed number of antennas and selecting at least two antennas based on the codebook.
    Type: Grant
    Filed: December 4, 2018
    Date of Patent: October 27, 2020
    Assignee: University of Notre Dame du Lac
    Inventors: Mingming Cai, J. Nicholas Laneman, Bertrand Hochwald
  • Patent number: 10652833
    Abstract: In certain aspects, a method implemented in a wireless device includes determining a specific absorption rate (SAR) distribution for a first wireless communication technology, determining a power density (PD) distribution for a second wireless communication technology, and combining the SAR distribution and the PD distribution to generate a combined RF exposure distribution. The method also includes determining at least one first maximum allowable power level and at least one second maximum allowable power level for a future time slot based on the combined RF exposure distribution, setting at least one transmission power limit for a first transmitter in the future time slot based on the at least one first maximum allowable power level, and setting at least one transmission power limit for a second transmitter in the future time slot based on the at least one second maximum allowable power level.
    Type: Grant
    Filed: July 2, 2019
    Date of Patent: May 12, 2020
    Assignee: QUALCOMM Incorporated
    Inventors: Jagadish Nadakuduti, Lin Lu, Paul Guckian, Mingming Cai, Junsheng Han, Udara Fernando, Raghu Challa
  • Publication number: 20200021421
    Abstract: In an aspect of the disclosure, a method, a computer-readable medium, and an apparatus are provided. In certain configurations, the apparatus may be a user equipment (UE). The apparatus may receive configuration information for UL and DL transmissions from another device such as a base station. The apparatus may determine a maximum duty cycle of the UL transmission based on the configuration information. Based on the determined UL maximum duty cycle, the apparatus may determine a transmit power limit for the UL transmission. In one aspect, the apparatus may determine the UL transmit power limit by dividing the power corresponding to a maximum permissible exposure (MPE) limit by the determined maximum UL duty cycle. The apparatus may leverage the forward knowledge of the UL duty cycle to transmit at a power level that complies with the MPE limit while avoiding the poor uplink range associated with static power back-off.
    Type: Application
    Filed: June 14, 2019
    Publication date: January 16, 2020
    Inventors: Junsheng HAN, Udara FERNANDO, Lin LU, John FORRESTER, Mingming CAI, Tao LUO, Raghu Narayan CHALLA
  • Publication number: 20200015171
    Abstract: In certain aspects, a method implemented in a wireless device includes determining a specific absorption rate (SAR) distribution for a first wireless communication technology, determining a power density (PD) distribution for a second wireless communication technology, and combining the SAR distribution and the PD distribution to generate a combined RF exposure distribution. The method also includes determining at least one first maximum allowable power level and at least one second maximum allowable power level for a future time slot based on the combined RF exposure distribution, setting at least one transmission power limit for a first transmitter in the future time slot based on the at least one first maximum allowable power level, and setting at least one transmission power limit for a second transmitter in the future time slot based on the at least one second maximum allowable power level.
    Type: Application
    Filed: July 2, 2019
    Publication date: January 9, 2020
    Inventors: Jagadish NADAKUDUTI, Lin LU, Paul GUCKIAN, Mingming CAI, Junsheng HAN, Udara FERNANDO, Raghu CHALLA
  • Publication number: 20190173537
    Abstract: A method for managing beam squint in a phased antenna array system operating at millimeter wavelengths using carrier aggregation includes determining a minimum array gain threshold, determining an upper bound for a fractional bandwidth for a fixed number of antennas, and constructing a codebook with a predetermined coverage range based on at least one of an angle of arrival or an angle of departure and further based on the upper bound. The method further includes performing carrier aggregation for the fixed number of antennas and selecting at least two antennas based on the codebook.
    Type: Application
    Filed: December 4, 2018
    Publication date: June 6, 2019
    Inventors: Mingming Cai, J. Nicholas Nicholas Laneman, Bertrand Hochwald
  • Patent number: 9858797
    Abstract: An association connection is established between a first Bluetooth Low Energy (BLE) device operating in central mode and attached to an asset to track, and a second BLE device operating in peripheral mode and associated with a physical location within the asset management environment. An association connection is established between the second BLE device and a third BLE device operating in central mode and coupled to one or more computer processors, and the association information stored in the second BLE device to the third BLE via one or more broadcasting frames is periodically transmitted. Based on current association information between the first BLE device and the second BLE device, an identity of the asset to which the first BLE device is attached, and the physical location of the second BLE device within the asset management environment is identified.
    Type: Grant
    Filed: September 22, 2015
    Date of Patent: January 2, 2018
    Assignee: International Business Machines Corporation
    Inventors: Mingming Cai, Yubo Li, Qing Wang, Chao Xue
  • Patent number: 9654928
    Abstract: An association connection is established between a first Bluetooth Low Energy (BLE) device operating in central mode and attached to an asset to track, and a second BLE device operating in peripheral mode and associated with a physical location within the asset management environment. An association connection is established between the second BLE device and a third BLE device operating in central mode and coupled to one or more computer processors, and the association information stored in the second BLE device to the third BLE via one or more broadcasting frames is periodically transmitted. Based on current association information between the first BLE device and the second BLE device, an identity of the asset to which the first BLE device is attached, and the physical location of the second BLE device within the asset management environment is identified.
    Type: Grant
    Filed: June 10, 2016
    Date of Patent: May 16, 2017
    Assignee: International Business Machines Corporation
    Inventors: Mingming Cai, Yubo Li, Qing Wang, Chao Xue
  • Publication number: 20170084159
    Abstract: An association connection is established between a first Bluetooth Low Energy (BLE) device operating in central mode and attached to an asset to track, and a second BLE device operating in peripheral mode and associated with a physical location within the asset management environment. An association connection is established between the second BLE device and a third BLE device operating in central mode and coupled to one or more computer processors, and the association information stored in the second BLE device to the third BLE via one or more broadcasting frames is periodically transmitted. Based on current association information between the first BLE device and the second BLE device, an identity of the asset to which the first BLE device is attached, and the physical location of the second BLE device within the asset management environment is identified.
    Type: Application
    Filed: September 22, 2015
    Publication date: March 23, 2017
    Inventors: Mingming Cai, Yubo Li, Qing Wang, Chao Xue
  • Publication number: 20170086025
    Abstract: An association connection is established between a first Bluetooth Low Energy (BLE) device operating in central mode and attached to an asset to track, and a second BLE device operating in peripheral mode and associated with a physical location within the asset management environment. An association connection is established between the second BLE device and a third BLE device operating in central mode and coupled to one or more computer processors, and the association information stored in the second BLE device to the third BLE via one or more broadcasting frames is periodically transmitted. Based on current association information between the first BLE device and the second BLE device, an identity of the asset to which the first BLE device is attached, and the physical location of the second BLE device within the asset management environment is identified.
    Type: Application
    Filed: June 10, 2016
    Publication date: March 23, 2017
    Inventors: Mingming Cai, Yubo Li, Qing Wang, Chao Xue
  • Patent number: 9420562
    Abstract: An association connection is established between a first Bluetooth Low Energy (BLE) device operating in central mode and attached to an asset to track, and a second BLE device operating in peripheral mode and associated with a physical location within the asset management environment. An association connection is established between the second BLE device and a third BLE device operating in central mode and coupled to one or more computer processors, and the association information stored in the second BLE device to the third BLE via one or more broadcasting frames is periodically transmitted. Based on current association information between the first BLE device and the second BLE device, an identity of the asset to which the first BLE device is attached, and the physical location of the second BLE device within the asset management environment is identified.
    Type: Grant
    Filed: February 24, 2016
    Date of Patent: August 16, 2016
    Assignee: International Business Machines Corporation
    Inventors: Mingming Cai, Yubo Li, Qing Wang, Chao Xue