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).

  • System and Method for Uplink Timing Synchronization in Conjunction with Discontinuous Reception
    Publication number: 20180295577
    Abstract: A system and method are disclosed for providing uplink timing synchronization during DRX operation in a wireless communication system.
    Type: Application
    Filed: June 15, 2018
    Publication date: October 11, 2018
    Inventors: James Earl Womack, Yi Yu, Zhijun Cai
  • System and Method for Uplink Timing Synchronization in Conjunction with Discontinuous Reception
    Publication number: 20180295575
    Abstract: A system and method are disclosed for providing uplink timing synchronization during DRX operation in a wireless communication system.
    Type: Application
    Filed: June 15, 2018
    Publication date: October 11, 2018
    Inventors: James Earl Womack, Yi Yu, Zhijun Cai
  • INTERACTIVE COMMENT INTERACTION METHOD AND APPARATUS
    Publication number: 20180293088
    Abstract: An interactive comment interface method and apparatus are provided that allow a user to obtain a comment publishing request in a text input interface, a picture input interface, a music input interface, a speech input interface, and/or a video input interface. The interface also allows for one or more combinations of text, picture, speech, and video that can be provided by using the data input interface that creates rich-media comment information.
    Type: Application
    Filed: January 24, 2017
    Publication date: October 11, 2018
    Applicant: TENCENT TECHNOLOGY (SHENZHEN) COMPANY LIMITED
    Inventors: Cong CHEN, Zhijun CAI, Liwei ZHAO, Fangjun XIE
  • System and method for uplink timing synchronization in conjunction with discontinuous reception
    Patent number: 10085210
    Abstract: A system and method are disclosed for providing uplink timing synchronization during DRX operation in a wireless communication system.
    Type: Grant
    Filed: June 30, 2017
    Date of Patent: September 25, 2018
    Assignee: GUANGDONG OPPO MOBILE TELECOMMUNICATIONS, CORP., LTD
    Inventors: James Earl Womack, Yi Yu, Zhijun Cai
  • Method and system having reference signal design for new carrier types
    Patent number: 10075273
    Abstract: A method and network element for providing reference signals to a user equipment, the method determining a reference signal pattern at the network element; and sending the reference signals to the user equipment using a reference signal mapping based on the reference signal pattern. Further a method and user equipment for receiving reference signals from a network element, the method determining a reference signal mapping at the user equipment; and detecting the reference signals at the user equipment using the reference signal mapping.
    Type: Grant
    Filed: June 17, 2016
    Date of Patent: September 11, 2018
    Assignee: BlackBerry Limited
    Inventors: Joon Beom Kim, Yi Song, Zhijun Cai
  • System and method for uplink timing synchronization in conjunction with discontinuous reception
    Patent number: 10075916
    Abstract: A system and method are disclosed for providing uplink timing synchronization during DRX operation in a wireless communication system.
    Type: Grant
    Filed: June 30, 2017
    Date of Patent: September 11, 2018
    Assignee: GUANGDONG OPPO MOBILE TELECOMMUNICATIONS CORP., LTD.
    Inventors: James Earl Womack, Yi Yu, Zhijun Cai
  • System and method for uplink timing synchronization in conjunction with discontinuous reception
    Patent number: 10075915
    Abstract: A system and method are disclosed for providing uplink timing synchronization during DRX operation in a wireless communication system.
    Type: Grant
    Filed: June 30, 2017
    Date of Patent: September 11, 2018
    Assignee: GUANGDONG OPPO MOBILE TELECOMMUNICATIONS CORP., LTD.
    Inventors: James Earl Womack, Yi Yu, Zhijun Cai
  • SYSTEMS AND METHODS FOR DATA OFFLOAD IN WIRELESS NETWORKS
    Publication number: 20180249529
    Abstract: Systems, methods, and apparatuses for radio resource control (RRC) signaling in wireless communication networks with data offload are provided. The radio configuration messages from a small cell to a dual connection UE may be sent by an overlay macro E-UTRAN node-B (eNB). The small cell may send the RRC messages to the macro-eNB first via a backhaul link, and the macro-eNB then transmits the messages to the UE. In some implementations, the radio configuration messages from a small cell to a dual connection UE may be sent directly from the small cell. In some other implementations, some of the RRC messages may be sent selectively to/from either the macro-cell or the small cell, or to/from both the macro-cell and the small cell. The type of RRC messages sent over the small cell and/or the macro-cell may be preconfigured or predetermined.
    Type: Application
    Filed: April 30, 2018
    Publication date: August 30, 2018
    Applicant: BlackBerry Limited
    Inventors: Shiwei GAO, Yufei Wu BLANKENSHIP, Zhijun CAI
  • Configuring a discard timer
    Patent number: 10064111
    Abstract: A first wireless access network node receives, from a second wireless access network node, delay information relating to a delay in buffering data at a protocol layer in the second wireless access network node. The first wireless access network node configures a discard timer based on the received delay information for a packet to be sent to a user equipment.
    Type: Grant
    Filed: November 10, 2016
    Date of Patent: August 28, 2018
    Assignee: BlackBerry Limited
    Inventor: Zhijun Cai
  • Enhancing Group Communication Services
    Publication number: 20180242117
    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: Application
    Filed: April 20, 2018
    Publication date: August 23, 2018
    Applicant: BlackBerry Limited
    Inventors: Zhijun Cai, Chandra Sekhar Bontu, Yi Song
  • Methods and Apparatus for Enabling Further L1 Enhancements in LTE Heterogeneous Networks
    Publication number: 20180227946
    Abstract: A network element in a first cell in a wireless telecommunication network is provided. The network element comprises a processor configured such that the network element provides uplink and downlink grants in the first cell, wherein the first cell is a low-power cell within the coverage area of a second, high-power cell, and wherein the first cell acts as a secondary cell and the second cell acts as a primary cell in a carrier aggregation mode, and wherein at least one uplink control signal is received by one of only the first cell or both the first cell and the second cell.
    Type: Application
    Filed: March 13, 2018
    Publication date: August 9, 2018
    Inventors: Yi Song, Chandra Sekhar Bontu, Zhijun Cai
  • METHOD AND SYSTEM FOR DISCOVERY OF DEVICES IN A WIRELESS NETWORK WITH PARTIAL COVERAGE
    Publication number: 20180227740
    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: Application
    Filed: April 2, 2018
    Publication date: August 9, 2018
    Applicant: BlackBerry Limited
    Inventors: William Anthony GAGE, Biswaroop MUKHERJEE, Masoud EBRAHIMI TAZEH MAHALLEH, Robert NOVAK, Zhijun CAI
  • System and method for controlling operation of machine
    Patent number: 10041229
    Abstract: A system for controlling an operation of a machine is disclosed. The system includes an image capturing device and a controller. The image capturing device generates a signal indicative of a surrounding area of the machine. The controller is in communication with the image capturing device. The controller determines a preceding work cycle of the machine comprising a dig segment and determines a preceding segment associated with the preceding work cycle to be a dump segment. The controller further identifies a work aggregate within the surrounding area of the machine, when the preceding segment of the preceding work cycle is the dump segment. Further, the controller determines a distance between an implement of the machine and the work aggregate and issues a shift request to downshift a gear drive of a transmission system of the machine, if the distance is less than a predefined distance.
    Type: Grant
    Filed: November 2, 2015
    Date of Patent: August 7, 2018
    Assignee: Caterpillar Inc.
    Inventors: Zhijun Cai, Bradley K. Bomer, Jeffrey S. Alig, Aaron R. Shatters, Eric Cler, Brad R. Van De Veer, Thomas E. Beccue
  • System and method for uplink timing synchronization in conjunction with discontinuous reception
    Patent number: 10039153
    Abstract: A system and method are disclosed for providing uplink timing synchronization during DRX operation in a wireless communication system.
    Type: Grant
    Filed: June 30, 2017
    Date of Patent: July 31, 2018
    Assignee: GUANGDONG OPPO MOBILE TELECOMMUNICATIONS CORP., LTD.
    Inventors: James Earl Womack, Yi Yu, Zhijun Cai
  • Pump Failure Differentiation System
    Publication number: 20180209415
    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: Application
    Filed: January 23, 2017
    Publication date: July 26, 2018
    Applicant: Caterpillar Inc.
    Inventors: Yanchai Zhang, Zhijun Cai, Zhaoxu Dong, Xuefei Hu
  • Method and system for HARQ operation and scheduling in joint TDD and FDD carrier aggregation
    Patent number: 10033512
    Abstract: A method at a user equipment for hybrid automatic repeat request (HARQ) operation, the user equipment operating on a primary carrier having a first duplex mode and on at least one secondary carrier having a second duplex mode, the method using HARQ timing of the first duplex mode if the timing of the first duplex mode promotes acknowledgement opportunities over using HARQ timing of the second duplex mode; and using HARQ timing of the second duplex mode if the timing of the second duplex mode promotes acknowledgement opportunities over using HARQ timing of the first duplex mode.
    Type: Grant
    Filed: June 30, 2016
    Date of Patent: July 24, 2018
    Assignee: BlackBerry Limited
    Inventors: Yiping Wang, Zhijun Cai, David Nigel Freeman
  • System and Method for Monitoring Valve Wear in a Fluid Pump
    Publication number: 20180202423
    Abstract: A pump for pumping fluid includes a pressure sensor disposed in the discharge outlet that communicates with a plurality of pumping chambers. The pressure sensor monitors the discharge pressure and transmits the discharge pressure to a logic device. The logic device is configured to analyze the discharge pressure verses time, determine a peak-to-peak amplitude associated with the discharge pressure verses time, and to detect a pressure spike corresponding to the maximum or high peak-to-peak amplitude. The pressure spike may correspond to uncharacteristic operation of a discharge valve or a suction valve associated with the pump.
    Type: Application
    Filed: January 19, 2017
    Publication date: July 19, 2018
    Applicant: Caterpillar Inc.
    Inventors: Yanchai Zhang, Zhijun Cai, Zhaoxu Dong
  • System and method for sharing a control channel for carrier aggregation
    Patent number: 10027460
    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, the method comprising the steps of identifying the number of configured carriers used to communicate with the access device, based on the number of configured carriers used to communicate with the access device, identifying a number of CCE subset candidates to decode and decoding up to the identified number of CCE subset candidates in an attempt to identify the resource grant.
    Type: Grant
    Filed: June 15, 2010
    Date of Patent: July 17, 2018
    Assignee: GUANGDONG OPPO MOBILE TELECOMMUNICATIONS CORP., LTD.
    Inventors: Sean McBeath, Mo-han Fong, Zhijun Cai, Mark Earnshaw, Youn Hyoung Heo
  • Method and relay node for mobile relay enablement
    Patent number: 10028185
    Abstract: A method and relay node for managing a relay node that is moving relative to a source network node, the method receiving parameters of a target network node from a source network node at the relay node; initiating a direct attachment of the relay node to the target network node; and detaching the relay node from the source network node. Also, a method and network node for managing a relay node that is moving relative to a source network node, the method sending a handover request of a relay node from the source network node to a target network node; performing handover of a plurality of user equipments (UEs) from the source network node to the target network node, wherein the plurality of UEs are attached to the relay node, and establishing an interface between the relay node and the target network node.
    Type: Grant
    Filed: August 30, 2016
    Date of Patent: July 17, 2018
    Assignee: BlackBerry Limited
    Inventors: Yi Yu, Zhijun Cai, Yi Song, Yufei Wu Blankenship, Chandra Sekhar Bontu
  • Providing a time offset between scheduling request and sounding reference symbol transmissions
    Patent number: 10028299
    Abstract: A user equipment (UE) including a processor configured to promote scheduling transmission of a series of scheduling requests offset a series of sounding reference symbols.
    Type: Grant
    Filed: March 21, 2008
    Date of Patent: July 17, 2018
    Assignee: BlackBerry Limited
    Inventors: Zhijun Cai, James Earl Womack, Yi Yu