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: 11026213
    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 1, 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: 11006462
    Abstract: Systems and methods for handling of an uplink transmission collision with an ACK/NACK signal are provided. An ACK/NACK may be configured for a repetition sequence. The ACK/NACK signal transmission on a particular subframe can be refrained due to the collision. The UL transmission can be performed on the subframe.
    Type: Grant
    Filed: September 10, 2012
    Date of Patent: May 11, 2021
    Assignee: BlackBerry Limited
    Inventors: Andrew Mark Earnshaw, Zhijun Cai
  • Publication number: 20210127331
    Abstract: A system and method are disclosed for providing uplink timing synchronization during DRX operation in a wireless communication system.
    Type: Application
    Filed: December 31, 2020
    Publication date: April 29, 2021
    Inventors: James Earl Womack, Yi Yu, Zhijun Cai
  • Patent number: 10959192
    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: January 7, 2020
    Date of Patent: March 23, 2021
    Assignee: BlackBerry Limited
    Inventors: Youn Hyoung Heo, Zhijun Cai, Andrew Mark Earnshaw, Sean Michael McBeath, Mo-Han Fong
  • Patent number: 10952141
    Abstract: A system and method are disclosed for providing uplink timing synchronization during DRX operation in a wireless communication system.
    Type: Grant
    Filed: April 9, 2019
    Date of Patent: March 16, 2021
    Assignee: Guangdong OPPO Mobile Telecommunications Corp., Ltd.
    Inventors: James Earl Womack, Yi Yu, Zhijun Cai
  • Publication number: 20210069932
    Abstract: An inference system for monitoring a cementitious mixture for three-dimensional printing is provided. The inference system includes an ambient condition sensor, a temperature sensor, a moisture sensor and an image capturing device. The inference system also includes a controller coupled to the ambient condition sensor, the temperature sensor, the moisture sensor, and the image capturing device. The controller receives sensed ambient conditions, a temperature signal, and a moisture content signal. The controller receives an image feed of a portion of a cementitious mixture. The controller also receives signals indicative of a motor speed and a motor torque associated with a mixing container. The controller builds a model and determines a material suitability of the cementitious mixture using the model based on the received ambient conditions, the temperature signal, the moisture content signal, the image feed, the motor speed, and the motor torque and determines one or more corrective actions.
    Type: Application
    Filed: November 18, 2020
    Publication date: March 11, 2021
    Applicant: Caterpillar Inc.
    Inventors: Daniel Martinez, Daniel Peter Sergison, Zhijun Cai, Jean-Jacques Clar, Eric Alan Reiners, Benjamin John Hodel, Benjamin L. Naasz
  • Patent number: 10932190
    Abstract: Methods and apparatus for controlling discontinuous reception on a mobile device and in particular to control a short discontinuous reception timer in response to receipt of a medium access control control element. The methods and apparatus include stopping, restarting or maintaining the short discontinuous reception timer. Methods and apparatus for limiting or stopping a retransmission timer by providing user equipment with a maximum retry value for transmissions, by providing a maximum redundant version value, or by providing a medium access control control element to stop or prevent the start of a retransmission timer.
    Type: Grant
    Filed: June 3, 2019
    Date of Patent: February 23, 2021
    Assignee: BlackBerry Limited
    Inventors: Zhijun Cai, James Earl Womack, Takashi Suzuki, Gordon Peter Young, Yi Yu
  • Patent number: 10927774
    Abstract: An engine controller to control a plurality of engines is disclosed. The engine controller may identify a plurality of engines configured to provide power to a load, wherein the plurality of engines have a first set of priorities associated with providing the power to the load; receive a plurality of parameters from a plurality of monitoring devices monitoring the plurality of engines; calculate a plurality of metrics corresponding to the plurality of engines based on the plurality of parameters; determine, based on the plurality of metrics, that a switching condition is satisfied to switch from the first set of priorities to a second set of priorities for the plurality of engines; determine the second set of priorities for the plurality of engines based on the plurality of metrics; and cause the plurality of engines to provide respective amounts of power to the load based on the second set of priorities.
    Type: Grant
    Filed: September 4, 2018
    Date of Patent: February 23, 2021
    Assignee: Caterpillar Inc.
    Inventors: Zhijun Cai, Ronald Gayles, Yanchai Zhang, Stephen Nofsinger, Maurice Dust
  • Publication number: 20210051639
    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: Application
    Filed: November 3, 2020
    Publication date: February 18, 2021
    Applicant: BlackBerry Limited
    Inventors: Shiwei GAO, Yufei Wu BLANKENSHIP, Zhijun CAI
  • Patent number: 10904870
    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: January 26, 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: 10904713
    Abstract: In some implementations, a method in a user equipment (UE) for supporting group communication service includes receiving, from a base station, a group communication on a Physical Downlink Shared Channel (PDSCH). The UE determines a first Hybrid Automatic Repeat reQuest (HARQ) information that corresponds to the group communication on the PDSCH. The UE transmits the first HARQ information. In some implementations, the UE determines a group Channel State Information (CSI) for a group communication that is transmitted by a base station on a PDSCH. The UE determines a unicast CSI for a unicast communication that is transmitted by the base station on the PDSCH. The UE transmits the group CSI. The UE transmits the unicast CSI.
    Type: Grant
    Filed: April 20, 2018
    Date of Patent: January 26, 2021
    Assignee: BlackBerry Limited
    Inventors: Zhijun Cai, Chandra Sekhar Bontu, Yi Song
  • Publication number: 20210021364
    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: Application
    Filed: October 6, 2020
    Publication date: January 21, 2021
    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
  • Patent number: 10890061
    Abstract: A rig management system is disclosed. The rig management system may gather, from a set of sensors, data that includes: vibration data related to vibration of a valve associated with a pump of a hydraulic fracturing rig during operation of the pump, and pump speed data related to a speed of the pump during operation of the pump. The rig management system may process the data to identify a trend related to the vibration data, wherein the vibration data has been normalized based on the pump speed data. The rig management system may determine a remaining useful life of the valve based on the trend and threshold data that identifies a set of thresholds related to the vibration of the valve. The rig management system may determine that the remaining useful life satisfies a threshold. The rig management system may schedule an operation to be performed on the valve.
    Type: Grant
    Filed: August 23, 2018
    Date of Patent: January 12, 2021
    Assignee: Caterpillar Inc.
    Inventors: Zhijun Cai, Yanchai Zhang, Zhaoxu Dong
  • Publication number: 20210006424
    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: Application
    Filed: August 20, 2020
    Publication date: January 7, 2021
    Applicant: Wireless Innovations LLC
    Inventor: Zhijun CAI
  • Patent number: 10870219
    Abstract: An inference system for monitoring a cementitious mixture for three-dimensional printing is provided. The inference system includes an ambient condition sensor, a temperature sensor, a moisture sensor and an image capturing device. The inference system also includes a controller coupled to the ambient condition sensor, the temperature sensor, the moisture sensor, and the image capturing device. The controller receives sensed ambient conditions, a temperature signal, and a moisture content signal. The controller receives an image feed of a portion of a cementitious mixture. The controller also receives signals indicative of a motor speed and a motor torque associated with a mixing container. The controller builds a model and determines a material suitability of the cementitious mixture using the model based on the received ambient conditions, the temperature signal, the moisture content signal, the image feed, the motor speed, and the motor torque and determines one or more corrective actions.
    Type: Grant
    Filed: October 11, 2017
    Date of Patent: December 22, 2020
    Assignee: Caterpillar Inc.
    Inventors: Daniel Martinez, Daniel Peter Sergison, Zhijun Cai, Jean-Jacques Clar, Eric Alan Reiners, Benjamin J. Hodel, Benjamin L. Naasz
  • Patent number: 10856278
    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: May 8, 2017
    Date of Patent: December 1, 2020
    Assignee: Blackberry Limited
    Inventors: Shiwei Gao, Yufei Wu Blankenship, Zhijun Cai
  • Patent number: 10844854
    Abstract: A pump monitoring and notification system for a hydraulic pump includes an accelerometer and a controller. The accelerometer is associated with the hydraulic pump and is disposed relative to the hydraulic pump to generate acceleration data indicative of acceleration of the hydraulic pump. The controller is configured to access a fault threshold, access a time threshold, and determine an acceleration of the accelerometer based upon the acceleration data from the accelerometer. The controller is further configured to determine an RMS average of the acceleration of the accelerometer based upon the acceleration of the hydraulic pump, compare the RMS average of the acceleration of the accelerometer to the fault threshold, and generate an alert signal when the RMS average of the acceleration of the accelerometer exceeds the fault threshold for a time period exceeding the time threshold.
    Type: Grant
    Filed: January 23, 2017
    Date of Patent: November 24, 2020
    Assignee: Caterpillar Inc.
    Inventors: Yanchai Zhang, Zhijun Cai, Zhaoxu Dong, Xuefei Hu
  • Patent number: 10827396
    Abstract: A user equipment (UE) receives, from a plurality of wireless access network nodes, respective indicators, where the UE is concurrently connected to the plurality of wireless access network nodes. The UE determines, based on the indicators, a split of uplink data in a buffer of the UE into a plurality of uplink data portions for transmission by the UE to the respective wireless access network nodes.
    Type: Grant
    Filed: September 20, 2018
    Date of Patent: November 3, 2020
    Assignee: BlackBerry Limited
    Inventor: Zhijun Cai
  • Patent number: 10812961
    Abstract: A method at a wireless device outside of base station control, the method comprising: transmitting a device presence signal for a predetermined time period; and listening for a network presence signal sent in response to the device presence signal. Further, a method at a wireless device, the method comprising: listening for a device presence signal; and transmitting a network presence signal in response to the device presence signal.
    Type: Grant
    Filed: April 2, 2018
    Date of Patent: October 20, 2020
    Assignee: BlackBerry Limited
    Inventors: William Anthony Gage, Biswaroop Mukherjee, Masoud Ebrahimi Tazeh Mahalleh, Robert Novak, Zhijun Cai
  • Patent number: RE48441
    Abstract: A method and device for handling hybrid automatic repeat request (‘HARQ’) operations during transmission mode changes, the method detecting a transmission mode change; and manipulating an HARQ process buffer based on the detecting. Further, a method and network element for handling hybrid automatic repeat request (‘HARQ’) operations during transmission mode changes, the method checking when a user equipment is in a transmission mode uncertainty window; and blocking communications to the user equipment or utilizing a downlink control information format 1A for communications to the user equipment.
    Type: Grant
    Filed: April 30, 2018
    Date of Patent: February 16, 2021
    Assignee: BlackBerry Limited
    Inventors: Andrew Mark Earnshaw, Takashi Suzuki, Zhijun Cai, Youn Hyoung Heo