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: 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: 10798649
    Abstract: Methods, systems and apparatus are provided for camping, assisted serving cell addition or removal, and discontinuous reception (DRX) in networks having a macro cell and at least one assisted serving cell. In other aspects, enhancements to Layer 1 channels and uplink timing alignments are provided in networks having a macro cell and at least one assisted serving cell. In further aspects, assisted serving cell Layer 2 architecture and transport channels are provided in networks having a macro cell and at least one assisted serving cell. In further aspects, collaborated HARQ solutions are provided in networks having a macro cell and at least one assisted serving cell.
    Type: Grant
    Filed: October 27, 2017
    Date of Patent: October 6, 2020
    Assignee: BlackBerry Limited
    Inventors: Zhijun Cai, Yi Song, Chandra Sekhar Bontu
  • Publication number: 20200314785
    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 16, 2020
    Publication date: October 1, 2020
    Inventors: Hua Xu, Shiwei Gao, Yajun Zhu, Zhijun Cai, Chandra Sekhar Bontu, Yi Song
  • Patent number: 10790998
    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 9, 2017
    Date of Patent: September 29, 2020
    Assignee: Wireless Innovations LLC
    Inventor: Zhijun Cai
  • Patent number: 10769576
    Abstract: A method for cargo load detection in a container by a computing device, the method including projecting at least one light dot within an array of light dots towards a surface of the container; capturing an image of the at least one light dot on the surface of the container; and using the captured image to determine cargo loading within the container.
    Type: Grant
    Filed: May 22, 2019
    Date of Patent: September 8, 2020
    Assignee: BlackBerry Limited
    Inventors: Jesse William Bennett, Zhijun Cai, Sandeep Chennakeshu, Scott Leonard Dill, Mahendra Fuleshwar Prasad, Yu Gao
  • Publication number: 20200267714
    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: May 4, 2020
    Publication date: August 20, 2020
    Applicant: BlackBerry Limited
    Inventors: Hua XU, Youn Hyoung HEO, Zhijun CAI, Andrew Mark EARNSHAW, Mo-Han FONG, Sean Michael McBEATH, Robert Mark HARRISON
  • Publication number: 20200260435
    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: Application
    Filed: April 29, 2020
    Publication date: August 13, 2020
    Inventors: Yi Yu, Zhijun Cai, James Earl Womack
  • Publication number: 20200246967
    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: Application
    Filed: January 31, 2019
    Publication date: August 6, 2020
    Applicant: Caterpillar Inc.
    Inventors: Zhijun CAI, Daniel P. SERGISON, Daniel J. MARTINEZ, Corey L. GORMAN, Rustin G. METZGER, Eric A. REINERS
  • Publication number: 20200245312
    Abstract: A method for processing a control channel at a user agent (UA) to identify power control commands within a wireless communication system, the method comprising the steps of, at a user agent, monitoring for power control messages on a single carrier, decoding a message received on the single carrier to generate decoded information and using the decoded information to identify a power control command for each of at least first and second carriers.
    Type: Application
    Filed: December 27, 2019
    Publication date: July 30, 2020
    Applicant: BlackBerry Limited
    Inventors: Sean Michael McBeath, Mo-Han Fong, Youn Hyoung HEO, Zhijun Cai, Andrew Mark Earnshaw
  • Publication number: 20200220316
    Abstract: An optical amplifier assembly and a detection method capable of dynamically performing optical time-domain reflection detection. The detection method comprises obtaining signal light intensity detection signals from a first and second photodetectors and sending a control signal to an L-band Raman pump when it is determined that the signal light intensity in the second photodetector is lower than a first preset threshold, so that the L-band Raman pump enters into an optical time-domain reflection detection mode; sending a control signal to the L-band Raman pump when the signal light intensity in the second photodetector is greater than or equal the first preset threshold, so that the L-band Raman pump enters into an L-Band Raman optical fiber amplifier operation mode.
    Type: Application
    Filed: December 25, 2017
    Publication date: July 9, 2020
    Applicant: Accelink Technologies Co., Ltd.
    Inventors: Zhenyu Yu, Qinlian Bu, Chengpeng Fu, Zhijun Ye, Fei Liu, Fuxing Deng, Rui Lei, Xiao Cai
  • Patent number: 10701614
    Abstract: Methods of combining semi-persistent resource allocation and dynamic resource allocation are provided. Packets, such as VoIP packets, are transmitted on the uplink and downlink using respective semi-persistent resources. For each mobile device, awake periods and sleep periods are defined. The semi-persistent resources are aligned with the awake periods so that most of the time the mobile device can turn of its wireless access radio during the sleep periods. In addition, signalling to request, and to allocate, resources for additional packets are transmitted during the awake periods, and the resources allocated for the additional packets are within the awake windows.
    Type: Grant
    Filed: February 6, 2019
    Date of Patent: June 30, 2020
    Assignee: BlackBerry Limited
    Inventors: Zhijun Cai, James Earl Womack
  • Patent number: 10694481
    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: May 24, 2018
    Date of Patent: June 23, 2020
    Assignee: BlackBerry Limited
    Inventors: Hua Xu, Shiwei Gao, Zhijun Cai, Chandra Sekhar Bontu, Yi Song, Yajun Zhu
  • Patent number: 10693617
    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 13, 2018
    Date of Patent: June 23, 2020
    Assignee: GUANGDONG OPPO MOBILE TELECOMMUNICATIONS CORP., LTD.
    Inventors: Sean McBeath, Mo-han Fong, Zhijun Cai, Mark Earnshaw, Youn Hyoung Heo
  • Patent number: 10674490
    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: October 15, 2018
    Date of Patent: June 2, 2020
    Assignee: BlackBerry Limited
    Inventors: Yi Yu, Zhijun Cai, James Earl Womack
  • Publication number: 20200145937
    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: January 7, 2020
    Publication date: May 7, 2020
    Inventors: Youn Hyoung Heo, Zhijun Cai, Andrew Mark Earnshaw, Sean Michael McBeath, Mo-Han Fong
  • Patent number: 10644272
    Abstract: The disclosure relates to a cap assembly and a secondary battery. The cap assembly comprises: a cap plate having an electrode lead-out hole; an electrode terminal including a terminal plate which is located at a side of the cap plate and covers the electrode lead-out hole, and an outer peripheral surface of the terminal panel protrudes from an inner wall of the electrode lead-out hole; a first fixing member at least partly surrounding the terminal plate to fix the electrode terminal to the first fixing member; and a second fixing member connected with the cap plate and including a main portion, the second fixing member being separated from the electrode terminal by the first fixing member. One of the first fixing member and the main portion is provided with an engaging hole and the other is provided with an inserting portion to be inserted into the engaging hole.
    Type: Grant
    Filed: October 25, 2018
    Date of Patent: May 5, 2020
    Assignee: Contemporary Amperex Technology Co., Limited
    Inventors: Lulu Bai, Yulian Zheng, Peng Wang, Zhijun Guo, Chengyou Xing, Jianxiong Yang, Qichang Cai
  • Patent number: 10645678
    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: October 24, 2018
    Date of Patent: May 5, 2020
    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: 10645680
    Abstract: A method for use in a first user equipment (UE) includes receiving, from a base station, control information and a resource assignment for uplink transmission; and transmitting, based on the control information, a discovery signal on the assigned resource for uplink transmission, the discovery signal including a first temporary UE identifier (ID) assigned to the first UE, wherein the first temporary UE ID is used to identify the first UE for device-to-device communication.
    Type: Grant
    Filed: January 6, 2017
    Date of Patent: May 5, 2020
    Assignee: BlackBerry Limited
    Inventors: Zhijun Cai, Joon Beom Kim, Noun Choi, Changhoi Koo
  • Patent number: 10616873
    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: April 7, 2020
    Assignee: Guangdong Oppo Mobile Telecommunications Corp., Ltd.
    Inventors: Sean Michael McBeath, Andrew Mark Earnshaw, Mo-Han Fong, Youn Hyoung Heo, Zhijun Cai
  • Patent number: RE48248
    Abstract: A method for providing control information for a multimedia broadcast multicast service (MBMS) in network access equipment is provided. The method includes separating a multicast control channel of an MBMS transmission into a first portion and a second portion, placing in the first portion information related to the second portion, and placing in the second portion information related to receiving a multicast traffic channel portion of the MBMS transmission.
    Type: Grant
    Filed: August 6, 2019
    Date of Patent: October 6, 2020
    Assignee: BlackBerry Limited
    Inventor: Zhijun Cai