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).

  • Publication number: 20230130248
    Abstract: A system and method are disclosed for providing uplink timing synchronization during DRX operation in a wireless communication system.
    Type: Application
    Filed: December 22, 2022
    Publication date: April 27, 2023
    Inventors: James Earl WOMACK, Yi YU, Zhijun CAI
  • Publication number: 20230121802
    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: December 13, 2022
    Publication date: April 20, 2023
    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: 20230114001
    Abstract: A collision warning method in relation to vulnerable road users (VRUs), applied in a host vehicle when being driven, obtains a relative lateral distance between a vehicle and a VRU and obtains speed of movement of the VRU in addition to speed and direction of the host vehicle. A warning scenario is determined according to the relative lateral distance and the VRU speed. A warning distance according to the warning scenario and the relative speed is calculated, a relative distance between the host vehicle and the VRU is obtained, and the issue of a corresponding level of a collision warning is determined according to a comparison between the warning distance and the relative distance.
    Type: Application
    Filed: December 14, 2022
    Publication date: April 13, 2023
    Inventors: Zhijun Cai, Bo Yang, Congchuan Chen, Xiaoping Li, Qigao Feng, Yanfang Zeng
  • Patent number: 11627561
    Abstract: A method for informing a relay node when to receive data. The method includes the relay node being informed of a fixed point in a subframe of data when an access node will begin transmitting relevant data over a physical downlink shared channel. The method further includes the relay node beginning to receive data at approximately the fixed point.
    Type: Grant
    Filed: April 29, 2020
    Date of Patent: April 11, 2023
    Assignee: BlackBerry Limited
    Inventors: Yi Yu, Zhijun Cai, James Earl Womack
  • Patent number: 11576132
    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: Grant
    Filed: March 19, 2021
    Date of Patent: February 7, 2023
    Assignee: BlackBerry Limited
    Inventors: Youn Hyoung Heo, Zhijun Cai, Andrew Mark Earnshaw, Sean Michael McBeath, Mo-Han Fong
  • Patent number: 11575532
    Abstract: A system is provided for scheduling for a multicast broadcast single frequency network (MBSFN). The system includes a central control configured to promote a plurality of enhanced node Bs (ENBs) transmitting one or more multicast traffic channels (MTCHs). The one or more MTCHs are provided during a variable scheduling period (SP) and include a data portion that contains MBSFN traffic content and a variable scheduling portion that contains scheduling information related to the MBSFN traffic content.
    Type: Grant
    Filed: August 20, 2020
    Date of Patent: February 7, 2023
    Assignee: Wireless Innovations LLC
    Inventor: Zhijun Cai
  • Patent number: 11576120
    Abstract: A system and method are disclosed for providing uplink timing synchronization during DRX operation in a wireless communication system.
    Type: Grant
    Filed: December 31, 2020
    Date of Patent: February 7, 2023
    Assignee: GUANGDONG OPPO MOBILE TELECOMMUNICATIONS CORP., LTD.
    Inventors: James Earl Womack, Yi Yu, Zhijun Cai
  • Publication number: 20230025540
    Abstract: A method for visually tracking a gaze point of a human eye includes: periodically obtaining position coordinates of a human eye of a driver of a host vehicle and coordinates of a gaze point of a sightline of the human eye on ab inner side of a current projection screen; in combination with a refractive index and a curvature of the current projection screen, coordinates of a gaze point of the sightline on an outer side of the current projection screen and a corresponding refracted light path formed by outward refraction of the sightline are obtained, and in combination with a preset normal viewing distance of the human eye, a final gaze point of the sightline on the refracted light path and coordinates of the final gaze point are obtained.
    Type: Application
    Filed: June 4, 2021
    Publication date: January 26, 2023
    Inventors: Jin Zhang, Zhijun Cai, Ying Zhang
  • Patent number: 11558866
    Abstract: A method at a first wireless network element, the method receiving, from a second wireless network element, a plurality of packet data units (PDUs) for a user equipment; transmitting the PDUs to the user equipment (UE); compiling a PDU delivery status report in response to the transmitting of the PDUs; and sending the compiled PDU delivery status report to the second wireless network element.
    Type: Grant
    Filed: November 3, 2020
    Date of Patent: January 17, 2023
    Inventors: Shiwei Gao, Yufei Wu Blankenship, Zhijun Cai
  • Patent number: 11546900
    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: June 10, 2021
    Date of Patent: January 3, 2023
    Inventors: Zhijun Cai, Sean Michael McBeath, Hua Xu, Yongkang Jia, Youn Hyoung Heo, Andrew Mark Earnshaw, Mo-Han Fong, Robert Mark Harrison
  • Publication number: 20220393745
    Abstract: Methods, devices, and systems for the transmission of information in a wireless communication system are disclosed. In one embodiment, a method for the transmission of information in a wireless communication system comprises receiving a downlink message, wherein the downlink message includes a first control channel element; determining a first index using the location of the first control channel element; determining a second index; determining a first orthogonal resource using the first index; determining a second orthogonal resource using the second index; spreading an uplink message using the first orthogonal resource to form a first spread signal; spreading the uplink message using a second orthogonal resource to form a second spread signal; transmitting the first spread signal using a first antenna; and transmitting the second spread signal using a second antenna.
    Type: Application
    Filed: April 22, 2022
    Publication date: December 8, 2022
    Inventors: Hua XU, Youn Hyoung HEO, Zhijun CAI, Andrew Mark EARNSHAW, Mo-Han FONG, Sean Michael McBeath, Robert Mark HARRISON
  • Patent number: 11499547
    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: Grant
    Filed: February 27, 2020
    Date of Patent: November 15, 2022
    Assignee: Caterpillar Inc.
    Inventors: Yanchai Zhang, Zhijun Cai, Nathan S. Pauli, Zhaoxu Dong, Yong Sun, Xuefei Hu
  • Publication number: 20220312356
    Abstract: Described herein is a system with a first network element and a second network element. The first network element contains a processor configured to synchronize with the second network element; and maintain synchronization with the second network element. The first network element is a small cell eNB and the second network element is one of the following: a macro cell enhanced node-B (eNB); or a small cell eNB.
    Type: Application
    Filed: June 13, 2022
    Publication date: September 29, 2022
    Inventors: Hua Xu, Shiwei Gao, Yajun Zhu, Zhijun Cai, Chandra Sekhar Bontu, Yi Song
  • Patent number: 11428704
    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: Grant
    Filed: January 9, 2020
    Date of Patent: August 30, 2022
    Assignee: Caterpillar Inc.
    Inventors: Zhijun Cai, Yanchai Zhang, Wenming Zhao, Yong Sun, Xuefei Hu, Eric Wayne Ohlson, Suresh Baddam Reddy
  • Patent number: 11389953
    Abstract: A construction system includes an excavator having a hydraulically controlled linkage and a hydraulic robot. The hydraulic robot includes a plurality of arms extending from a base, each arm having a hydraulic motor. The hydraulic robot further includes a robot control system directing movement of the plurality of arms and an end effector platform movable by rotation of the arms.
    Type: Grant
    Filed: January 31, 2019
    Date of Patent: July 19, 2022
    Assignee: Caterpillar Inc.
    Inventors: Zhijun Cai, Daniel P. Sergison, Daniel J. Martinez, Corey L. Gorman, Rustin G. Metzger, Eric A. Reiners
  • Patent number: 11395248
    Abstract: Described herein is a system with a first network element and a second network element. The first network element contains a processor configured to synchronize with the second network element; and maintain synchronization with the second network element. The first network element is a small cell eNB and the second network element is one of the following: a macro cell enhanced node-B (eNB); or a small cell eNB.
    Type: Grant
    Filed: June 16, 2020
    Date of Patent: July 19, 2022
    Assignee: BlackBerry Limited
    Inventors: Hua Xu, Shiwei Gao, Yajun Zhu, Zhijun Cai, Chandra Sekhar Bontu, Yi Song
  • Publication number: 20220190994
    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: Application
    Filed: March 3, 2022
    Publication date: June 16, 2022
    Applicant: BlackBerry Limited
    Inventors: Takashi SUZUKI, Zhijun CAI, James Earl WOMACK
  • Publication number: 20220178235
    Abstract: An automated hydraulic fracturing system and method for controlling various aspects of a fracking operation is disclosed. A master controller receives various operating parameters, such as desired operating conditions, information about a fracking site, information about trailers and/or other equipment at the fracking site, and/or sensor signals. The master controller may access one or more trailer model(s) that model various parameters of equipment (e.g., engines, transmissions, pumps, trailers, etc.) at the fracking site as a function of controlled operating conditions. The master controller uses the trailer models in conjunction with operating parameters to generate control signals that automatically control the various equipment at the fracking site to optimize various desired outcomes, such as reduced operating costs, reduced emissions, reduced idle time, increased efficiency, etc.
    Type: Application
    Filed: December 3, 2020
    Publication date: June 9, 2022
    Applicant: Caterpillar Inc.
    Inventors: Yanchai Zhang, Zhijun Cai, Perry Dwain Converse, Erik L. Olsen, Casey Alan Otten
  • Patent number: 11337185
    Abstract: Methods, devices, and systems for the transmission of information in a wireless communication system are disclosed. In one embodiment, a method for the transmission of information in a wireless communication system comprises receiving a downlink message, wherein the downlink message includes a first control channel element; determining a first index using the location of the first control channel element; determining a second index; determining a first orthogonal resource using the first index; determining a second orthogonal resource using the second index; spreading an uplink message using the first orthogonal resource to form a first spread signal; spreading the uplink message using a second orthogonal resource to form a second spread signal; transmitting the first spread signal using a first antenna; and transmitting the second spread signal using a second antenna.
    Type: Grant
    Filed: May 4, 2020
    Date of Patent: May 17, 2022
    Assignee: BlackBerry Limited
    Inventors: Hua Xu, Youn Hyoung Heo, Zhijun Cai, Andrew Mark Earnshaw, Mo-Han Fong, Sean Michael McBeath, Robert Mark Harrison
  • 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