Patents by Inventor Zhijun Cai

Zhijun 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).

  • Patent number: 11283577
    Abstract: A method and apparatus for dynamic acknowledgement repetition for a downlink medium access control packet data unit transmission ‘MAC PDU’ requiring multiple acknowledgements, the method having the steps of: receiving the downlink MAC PDU requiring multiple acknowledgements; and utilizing a differentiating factor and acknowledgement scheme, sending the multiple acknowledgements.
    Type: Grant
    Filed: December 15, 2017
    Date of Patent: March 22, 2022
    Assignee: BlackBerry Limited
    Inventors: Takashi Suzuki, Zhijun Cai, James Earl Womack
  • Publication number: 20220061028
    Abstract: A system and method are disclosed that allows for uplink resource reuse. A user device is provided an uplink resource for a first data type. If the user device does not have enough data of the first data type to fill the granted uplink resource, the user device fills the granted uplink resource with a second data type.
    Type: Application
    Filed: September 2, 2021
    Publication date: February 24, 2022
    Inventors: Zhijun Cai, Sean Bartholomew Simmons, James Earl Womack, Takashi Suzuki, Yi Yu
  • Patent number: 11251620
    Abstract: A device may receive a power demand for a load and a weather forecast for a time period. The device may determine a first supply of power available from a photo-voltaic (PV) installation for the time period based on the weather forecast. The device may determine a power deficit for the time period based on the power demand and the first supply of power. The device may determine a first cost associated with utilizing a second supply of power available from a battery and a second cost associated with utilizing a third supply of power available from an engine for the time period. The device may determine a power source to overcome the power deficit based on the first cost and the second cost and may cause the PV installation and the power source to supply power to satisfy the power demand for the load.
    Type: Grant
    Filed: March 3, 2020
    Date of Patent: February 15, 2022
    Assignee: Caterpillar Inc.
    Inventors: Zhijun Cai, Yanchai Zhang
  • Publication number: 20220007343
    Abstract: A method and system to signal transmission layers or dedicated reference signal ports to be used in a multiple input multiple output system, the method including providing a downlink control signal containing information for transmission layers or dedicated reference signal ports utilized, the dedicated reference signal ports being associated with the transmission layers; and using the information to demodulate data on each transmission layer.
    Type: Application
    Filed: June 10, 2021
    Publication date: January 6, 2022
    Applicant: BlackBerry Limited
    Inventors: Zhijun Cai, Sean Michael McBeath, Hua Xu, Yongkang Jia, Youn Hyoung Heo, Andrew Mark Earnshaw, Mo-Han Fong, Robert Mark Harrison
  • Publication number: 20210392599
    Abstract: A radio access network sends, to a mobile device, information indicating a cell on a first carrier of a first type and a cell on a second carrier of a second type, and sends, to the mobile device, configuration information regarding whether the mobile device is to connect with a cell on another carrier of a new carrier type. The radio access network sends, to the mobile device, information relating to a Discontinuous Reception (DRX) configuration that is specific to a type of carrier.
    Type: Application
    Filed: August 23, 2021
    Publication date: December 16, 2021
    Inventors: Takashi Suzuki, Zhijun Cai, Rene Waraputra Purnadi
  • Publication number: 20210345309
    Abstract: A method for processing a control channel at a user agent (UA) to identify at least one of an uplink and a downlink resource allocated by a resource grant within a multi-carrier communication system wherein resource grants are specified by control channel element (CCE) subset candidates wherein the carriers used for data transmission and reception are configured carriers, the method comprising the steps of receiving activation signals specifying active and deactivated carriers from among the configured carriers, for active carriers (i) identifying a number of CCE subset candidates to decode and (ii) decoding up to the identified number of CCE subset candidates in an attempt to identify the resource grant; and for deactivated carriers, ignoring CCE subset candidates associated with the deactivated carriers.
    Type: Application
    Filed: July 12, 2021
    Publication date: November 4, 2021
    Inventors: SEAN MICHAEL MCBEATH, ANDREW MARK EARNSHAW, MO-HAN FONG, YOUN HYOUNG HEO, ZHIJUN CAI
  • Publication number: 20210281931
    Abstract: A method at a sensor apparatus, the method including calculating a value for a target function based on at least one sensor of the sensor apparatus; determining that the value of the target function is within a defined threshold range for a defined time period, thereby finding an in-flight state for the sensor apparatus; and turning off transmission from a radio of the sensor apparatus based on the in-flight state.
    Type: Application
    Filed: May 20, 2021
    Publication date: September 9, 2021
    Inventors: Zhijun Cai, Shouxing Qu, Yu Gao, Gaëlle Christine Martin-Cocher, Jesse William Bennett
  • Publication number: 20210281077
    Abstract: A device may receive a power demand for a load and a weather forecast for a time period. The device may determine a first supply of power available from a photo-voltaic (PV) installation for the time period based on the weather forecast. The device may determine a power deficit for the time period based on the power demand and the first supply of power. The device may determine a first cost associated with utilizing a second supply of power available from a battery and a second cost associated with utilizing a third supply of power available from an engine for the time period. The device may determine a power source to overcome the power deficit based on the first cost and the second cost and may cause the PV installation and the power source to supply power to satisfy the power demand for the load.
    Type: Application
    Filed: March 3, 2020
    Publication date: September 9, 2021
    Applicant: Caterpillar Inc.
    Inventors: Zhijun CAI, Yanchai ZHANG
  • Patent number: 11115957
    Abstract: A system and method are disclosed that allows for uplink resource reuse. A user device is provided an uplink resource for a first data type. If the user device does not have enough data of the first data type to fill the granted uplink resource, the user device fills the granted uplink resource with a second data type.
    Type: Grant
    Filed: December 22, 2008
    Date of Patent: September 7, 2021
    Assignee: Hilco Patent Acquisition 55, LLC
    Inventors: Zhijun Cai, Sean Bartholomew Simmons, James Earl Womack, Takashi Suzuki, Yi Yu
  • Publication number: 20210270261
    Abstract: A hydraulic fracturing machine includes a pump failure detection system. The hydraulic fracturing machine includes a hydraulic fracturing pump with a power end and a fluid end. The power end includes a plurality of roller bearings, and the fluid end includes a flow of fluid. A particle sensor coupled to the power end is configured to transmit particle information regarding a quantity of particles in the fluid. A temperature sensor, also coupled to the power end, is configured to transmit temperature information regarding a temperature of the fluid. A vibration sensor coupled to the power end is configured to transmit vibration information regarding a vibration of each of the plurality of roller bearings. An electronic control module analyzes the particle information, the temperature information and the vibration information, and calculates a failure warning level based on the analysis.
    Type: Application
    Filed: February 27, 2020
    Publication date: September 2, 2021
    Applicant: Caterpillar Inc.
    Inventors: Yanchai Zhang, Zhijun Cai, Nathan S. Pauli, Zhaoxu Dong, Yong Sun, Xuefei Hu
  • Patent number: 11102742
    Abstract: Information is communicated indicating whether a cell on a first carrier of a first type is to be used as a reference cell, wherein the reference cell is at least one selected from among a pathloss reference cell and a timing reference cell, and wherein the first carrier of the first type is part of a carrier aggregation that further includes at least a second carrier of a second, different type.
    Type: Grant
    Filed: June 4, 2019
    Date of Patent: August 24, 2021
    Assignee: BlackBerry Limited
    Inventors: Takashi Suzuki, Zhijun Cai, Rene Waraputra Purnadi
  • Patent number: 11089580
    Abstract: A method for processing a control channel at a user agent (UA) to identify at least one of an uplink and a downlink resource allocated by a resource grant within a multi-carrier communication system wherein resource grants are specified by control channel element (CCE) subset candidates wherein the carriers used for data transmission and reception are configured carriers, the method comprising the steps of receiving activation signals specifying active and deactivated carriers from among the configured carriers, for active carriers (i) identifying a number of CCE subset candidates to decode and (ii) decoding up to the identified number of CCE subset candidates in an attempt to identify the resource grant; and for deactivated carriers, ignoring CCE subset candidates associated with the deactivated carriers.
    Type: Grant
    Filed: August 11, 2017
    Date of Patent: August 10, 2021
    Assignee: GUANGDONG OPPO MOBILE TELECOMMUNICATIONS CORP., LTD.
    Inventors: Sean Michael McBeath, Andrew Mark Earnshaw, Mo-Han Fong, Youn Hyoung Heo, Zhijun Cai
  • Publication number: 20210215733
    Abstract: A system and method for protecting a genset from pole slip is disclosed. The system may comprise a generator, a prime mover and a controller. The generator includes a stator and a rotor. The prime mover is configured to drive rotation of the rotor. The controller may be configured to: determine mechanical status of the generator based on data associated with a translational displacement of the rotor; determine electrical status of the generator based on (a) a load angle or (b) the load angle and a rate of change of the load angle associated with rotation of the rotor in the stator; determine an operating condition of the generator based on fusion of the mechanical status and the electrical status; if the operating condition is a pole-slip-warning, activate an output member to display or emit a warning; and, if the operating condition is a pole-slip, activate a protective action.
    Type: Application
    Filed: January 9, 2020
    Publication date: July 15, 2021
    Applicant: Caterpillar Inc.
    Inventors: Zhijun Cai, Yanchai Zhang, Wenming Zhao, Yong Sun, Xuefei Hu, Eric Wayne Ohlson, Suresh Baddam Reddy
  • Publication number: 20210211997
    Abstract: A method for reporting power headroom-related information for a plurality of aggregated carriers. The method includes reporting in a bitmap the power headroom-related information for a number of the aggregated carriers that is less than or equal to the total number of aggregated carriers, wherein the power headroom-related information is one of a power headroom for at least one of the aggregated carriers and a path loss for at least one of the aggregated carriers.
    Type: Application
    Filed: March 19, 2021
    Publication date: July 8, 2021
    Inventors: Youn Hyoung Heo, Zhijun Cai, Andrew Mark Earnshaw, Sean Michael McBeath, Mo-Han Fong
  • Patent number: 11051287
    Abstract: A method for processing a control channel at a user agent (UA) to identify at least one of an uplink and a downlink resource allocated by a resource grant within a multi-carrier communication system wherein resource grants are specified by control channel element (CCE) subset candidates wherein the carriers used for data transmission and reception are configured carriers, the method comprising the steps of receiving activation signals specifying active and deactivated carriers from among the configured carriers, for active carriers (i) identifying a number of CCE subset candidates to decode and (ii) decoding up to the identified number of CCE subset candidates in an attempt to identify the resource grant; and for deactivated carriers, ignoring CCE subset candidates associated with the deactivated carriers.
    Type: Grant
    Filed: August 11, 2017
    Date of Patent: June 29, 2021
    Assignee: Guangdong OPPO Mobile Telecommunications Corp., Ltd.
    Inventors: Sean Michael McBeath, Andrew Mark Earnshaw, Mo-Han Fong, Youn Hyoung Heo, Zhijun Cai
  • Patent number: 11044717
    Abstract: A method and system to signal transmission layers or dedicated reference signal ports to be used in a multiple input multiple output system, the method including providing a downlink control signal containing information for transmission layers or dedicated reference signal ports utilized, the dedicated reference signal ports being associated with the transmission layers; and using the information to demodulate data on each transmission layer.
    Type: Grant
    Filed: September 23, 2019
    Date of Patent: June 22, 2021
    Assignee: BlackBerry Limited
    Inventors: Zhijun Cai, Sean Michael McBeath, Hua Xu, Yongkang Jia, Youn Hyoung Heo, Andrew Mark Earnshaw, Mo-Han Fong, Robert Mark Harrison
  • Patent number: 11044710
    Abstract: A method for processing a control channel at a user agent (UA) to identify at least one of an uplink and a downlink resource allocated by a resource grant within a multi-carrier communication system wherein resource grants are specified by control channel element (CCE) subset candidates wherein the carriers used for data transmission and reception are configured carriers, the method comprising the steps of receiving activation signals specifying active and deactivated carriers from among the configured carriers, for active carriers (i) identifying a number of CCE subset candidates to decode and (ii) decoding up to the identified number of CCE subset candidates in an attempt to identify the resource grant; and for deactivated carriers, ignoring CCE subset candidates associated with the deactivated carriers.
    Type: Grant
    Filed: August 11, 2017
    Date of Patent: June 22, 2021
    Assignee: GUANDONG OPPO MOBILE TELECOMMUNICATIONS CORP., LTD.
    Inventors: Sean Michael McBeath, Andrew Mark Earnshaw, Mo-Han Fong, Youn Hyoung Heo, Zhijun Cai
  • Patent number: 11035873
    Abstract: A method at a sensor apparatus, the method including calculating a value for a target function based on at least one sensor of the sensor apparatus; determining that the value of the target function is within a defined threshold range for a defined time period, thereby finding an in-flight state for the sensor apparatus; and turning off transmission from a radio of the sensor apparatus based on the in-flight state.
    Type: Grant
    Filed: April 10, 2018
    Date of Patent: June 15, 2021
    Assignee: BlackBerry Limited
    Inventors: Zhijun Cai, Shouxing Qu, Yu Gao, Gaëlle Christine Martin-Cocher, Jesse William Bennett
  • Patent number: 11028842
    Abstract: A rig management system is disclosed. The rig management system may be configured to receive information to be used to control shifting of a transmission to prevent cavitation during use of the hydraulic fracturing rig. The rig management system may be configured to determine a flow rate for a pump based on the information. The rig management system may be configured to determine an output torque of the transmission based on the flow rate. The rig management system may be configured to determine a transmission gear for the transmission based on the output torque and a fuel consumption map, wherein the fuel consumption map identifies a respective fuel consumption rate for different combinations of transmission gears and output torques. The rig management system may be configured to cause the transmission to shift into the transmission gear after determining the transmission gear.
    Type: Grant
    Filed: July 31, 2018
    Date of Patent: June 8, 2021
    Assignee: Caterpillar Inc.
    Inventors: Yanchai Zhang, Zhijun Cai, Maurice Dust
  • Patent number: RE48767
    Abstract: A system and method for permuting known and unknown message bits before encoding to provide a beneficial rearrangement of bits. Such a method can improve distance properties in the resulting subcode. In various embodiments, the structure of a beneficial rearrangement is dependent on the parameters of how known and unknown bits are grouped and on the specific type of code being used. Given these two parameters, the message bits can be rearranged to more efficiently leverage any apriori knowledge.
    Type: Grant
    Filed: April 3, 2019
    Date of Patent: October 5, 2021
    Assignee: BlackBerry Limited
    Inventors: Michael Eoin Buckley, Sean Bartholomew Simmons, Nathaniel Joseph Karst, Youn Hyoung Heo, Zhijun Cai, Andrew Mark Earnshaw, Masoud Ebrahimi Tazeh Mahalleh, Mo-Han Fong