Patents by Inventor Qing Zhao

Qing Zhao 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: 9648569
    Abstract: A method is provided in one example embodiment and may include calculating, by one or more of a plurality of small cell radios, one or more sets of candidate power control parameters using a first interference constraint for uplink user equipment (UE) transmissions for UE served by the one or more of the plurality of small cell radios; determining, at a central management entity, whether an average of a sum of an expected interference for UE associated with the plurality of small cell radios violates a second interference constraint for any of the one or more sets of candidate power control parameters; and generating one or more messages for each of the plurality of small cell radios identifying one or more particular sets of power control parameters that provide for meeting the second interference constraint.
    Type: Grant
    Filed: July 25, 2015
    Date of Patent: May 9, 2017
    Assignee: CISCO TECHNOLOGY, INC.
    Inventors: Ritesh K. Madan, Rohit Umesh Nabar, Vikram Chandrasekhar, Kedar Durgadas Shirali, Qing Zhao
  • Publication number: 20170127441
    Abstract: Embodiments include starting a first timer if a queue state associated with a user equipment (UE) is estimated to equal zero bytes of data and if a last buffer status report received from the UE indicated the queue state to be greater than zero bytes of data, sending a control message granting uplink resources to the UE if the first timer expires, and determining the queue state associated with the UE based, at least in part, on a response to the control message. In specific embodiments the first timer expires if neither a scheduling request nor a buffer status report is received during a first timer interval after the first timer is started. Further embodiments include stopping the first timer if a scheduling request or a buffer status report is received before the first timer expires.
    Type: Application
    Filed: October 28, 2015
    Publication date: May 4, 2017
    Applicant: CISCO TECHNOLOGY, INC.
    Inventors: Vikram Chandrasekhar, Kedar D. Shirali, Ritesh K. Madan, Qing Zhao, Sushanth Chandappa Kulal
  • Publication number: 20170111926
    Abstract: An example method is provided in one example embodiment and includes receiving performance metric information from a plurality of small cell radios, wherein the performance metric information includes, at least in part, a number of user equipment that are to be scheduled on a first type and a second type of subframes for each small cell radio; determining resource allocation parameters for the plurality of small cell radios; exchanging interference information between two or more small cell radios of the plurality of small cell radios that includes an indication of whether a particular small cell radio is interfering with or is interfered by another small cell radio of the two or more small cell radios; and scheduling downlink resource transmissions on the first type and the second type of subframes for user equipment served by the two or more small cell radios.
    Type: Application
    Filed: October 20, 2015
    Publication date: April 20, 2017
    Applicant: CISCO TECHNOLOGY, INC.
    Inventors: Ritesh K. Madan, Vikram Chandrasekhar, Rohit Umesh Nabar, Kedar Durgadas Shirali, Qing Zhao
  • Publication number: 20170111919
    Abstract: An example method is provided in one example embodiment and includes receiving performance metric information from a plurality of small cell radios, wherein the performance metric information includes, at least in part, a number of user equipment that are to be scheduled on a first type and a second type of subframes for each small cell radio; determining resource allocation parameters for the plurality of small cell radios; exchanging interference information between two or more small cell radios of the plurality of small cell radios that includes an indication of whether a particular small cell radio is interfering with or is interfered by another small cell radio of the two or more small cell radios; and scheduling downlink resource transmissions on the first type and the second type of subframes for user equipment served by the two or more small cell radios.
    Type: Application
    Filed: November 25, 2015
    Publication date: April 20, 2017
    Applicant: CISCO TECHNOLOGY, INC.
    Inventors: Ritesh K. Madan, Vikram Chandrasekhar, Rohit Umesh Nabar, Kedar Durgadas Shirali, Qing Zhao
  • Patent number: 9629202
    Abstract: In a method of operating a device configured to communicate according to at least a first communication protocol and a second communication protocol, a time division multiplexing (TDM) pattern is obtained. The TDM pattern is defined for communication according to the first communication protocol is obtained. The TDM pattern defines communication periodicity that includes a scheduled period and an unscheduled period. A guard interval is reserved within the unscheduled period, and the unscheduled period is used for communication according to the second communication protocol. The guard interval is used to transition to an inactive state with respect to the second communication protocol.
    Type: Grant
    Filed: January 28, 2014
    Date of Patent: April 18, 2017
    Assignee: Marvell World Trade Ltd.
    Inventors: Qing Zhao, Hui-Ling Lou, Leilei Song
  • Publication number: 20170074867
    Abstract: The application is to antibodies which have been labelled with polyenzymes (multiple enzymes), specifically polyperoxidases, for use in direct immunohistochemical assays of tissues. The antibodies used diagnostically may also be antibodies which are used therapeutically.
    Type: Application
    Filed: May 7, 2015
    Publication date: March 16, 2017
    Inventors: Song Qing ZHAO, Jianfu Jeffrey WANG, Jin V. WU, Zhiqing ZHANG
  • Patent number: 9590792
    Abstract: The present disclosure describes systems and techniques relating to wireless communications by devices that employ more than one wireless communication technology. According to an aspect of the described systems and techniques, a device includes: a first radio configured to communicate wirelessly with a first station in accordance with a first wireless communication technology, a second radio configured to communicate wirelessly with a second station in accordance with a second wireless communication technology, a controller configured to (i) terminate scheduled portions of time for sending communications from the first radio to the first station in favor of receiving communications from the second station to the second radio and (ii) restrict which of all available scheduled portions of time for sending communications from the first radio to the first station are provided for termination based on information about types of data transmitted in respective ones of the available scheduled portions of time.
    Type: Grant
    Filed: April 1, 2014
    Date of Patent: March 7, 2017
    Assignee: Marvell World Trade Ltd.
    Inventors: Yi-Ling Chao, Qing Zhao, Leilei Song, Hui-Ling Lou, Yakun Sun
  • Patent number: 9578166
    Abstract: Apparatuses and methods concerning routing of calls in an IPBX server are disclosed. A first processing circuit is communicatively coupled to an IPBX server that routes VoIP calls for a plurality of end-users having respective VoIP-enabled devices and generates call event messages for the routed calls. The first processing circuit generates call summary metrics from the call event messages. A second processing circuit evaluates the call summary metrics to identify a set of incoming calls to the IPBX that were missed and have not been returned by the end-users. The second processing circuit cross-correlates the identified set of incoming calls with a secondary data source to determine a respective priorities for the set of incoming calls. The second processing circuit stores data indicating calls of the identified set have a higher priority.
    Type: Grant
    Filed: August 17, 2016
    Date of Patent: February 21, 2017
    Assignee: 8x8, Inc.
    Inventors: Zhishen Liu, Qing Zhao, Bryan R. Martin
  • Publication number: 20170041805
    Abstract: A mobile device obtains data to be wirelessly transmitted over a shared spectrum in an uplink channel to a base station. The uplink channel is formatted with a frame/subframe structure with a predetermined timing. The mobile device determines whether the shared spectrum is free for transmission according to a Listen Before Transmit procedure. When the shared spectrum is free for transmission, the mobile device selects a start time in the uplink channel that mitigates interference from other mobile devices in proximity to the mobile device. Beginning at the start time, the mobile device transmits the data over the shared spectrum in the uplink channel to the base station.
    Type: Application
    Filed: August 3, 2016
    Publication date: February 9, 2017
    Inventors: Vikram Chandrasekhar, Kedar Shirali, Qing Zhao, Rajesh Pazhyannur
  • Patent number: 9565582
    Abstract: A communication device includes a first network interface configured to communicate in a first network according to a first communication protocol, and a second network interface configured to communicate in a second network according to a second communication protocol. The first communication protocol defines a periodically repeating frame. The communication device predicts one or more subframes in the frame in which a serving base station in the first network will not transmit to the communication device because of poor channel conditions using at least one of i) measured channel quality in the one or more subframes, and ii) instructions sent to the communication device regarding channel quality measurements that are to be reported. In response to predicting the one or more subframes, operation of the first network interface is suspended during those subframes, and operation of the second network interface is enabled during at least one of those subframes.
    Type: Grant
    Filed: August 15, 2016
    Date of Patent: February 7, 2017
    Assignee: Marvell World Trade Ltd.
    Inventors: Qing Zhao, Yakun Sun, Yi-Ling Chao, Leilei Song, Hui-Ling Lou
  • Publication number: 20170026915
    Abstract: A method is provided in one example embodiment and may include calculating, by one or more of a plurality of small cell radios, one or more sets of candidate power control parameters using a first interference constraint for uplink user equipment (UE) transmissions for UE served by the one or more of the plurality of small cell radios; determining, at a central management entity, whether an average of a sum of an expected interference for UE associated with the plurality of small cell radios violates a second interference constraint for any of the one or more sets of candidate power control parameters; and generating one or more messages for each of the plurality of small cell radios identifying one or more particular sets of power control parameters that provide for meeting the second interference constraint.
    Type: Application
    Filed: August 24, 2015
    Publication date: January 26, 2017
    Applicant: CISCO TECHNOLOGY, INC.
    Inventors: Ritesh K. Madan, Rohit Umesh Nabar, Vikram Chandrasekhar, Kedar Durgadas Shirali, Qing Zhao
  • Publication number: 20170025379
    Abstract: A power module package includes a single-layered circuit board, a first electronic component, and a second electronic component. The single-layered circuit board includes an insulating substrate and a conductive layer thereon. A bottom surface of the conductive layer touches a top surface of the insulating substrate. The insulating substrate has plural first openings to allow the conductive layer to be exposed from the bottom surface of the insulating substrate. The first electronic component is disposed on a top surface of the conductive layer. The second electronic component is disposed on the bottom surface of the insulating substrate and received in the first openings. The second electronic component is connected to the conductive layer via the first openings. At least one of the first electronic component and the second electronic component is a bare die.
    Type: Application
    Filed: July 14, 2016
    Publication date: January 26, 2017
    Inventors: Le LIANG, Kai LU, Zhen-Qing ZHAO, Zeng LI
  • Publication number: 20170026914
    Abstract: A method is provided in one example embodiment and may include calculating, by one or more of a plurality of small cell radios, one or more sets of candidate power control parameters using a first interference constraint for uplink user equipment (UE) transmissions for UE served by the one or more of the plurality of small cell radios; determining, at a central management entity, whether an average of a sum of an expected interference for UE associated with the plurality of small cell radios violates a second interference constraint for any of the one or more sets of candidate power control parameters; and generating one or more messages for each of the plurality of small cell radios identifying one or more particular sets of power control parameters that provide for meeting the second interference constraint.
    Type: Application
    Filed: July 25, 2015
    Publication date: January 26, 2017
    Applicant: CISCO TECHNOLOGY, INC.
    Inventors: Ritesh K. Madan, Rohit Umesh Nabar, Vikram Chandrasekhar, Kedar Durgadas Shirali, Qing Zhao
  • Patent number: 9536210
    Abstract: To determine origin-destination (OD) data for a transportation system, a processor may receiving passenger statistics collected from a set of data collection devices deployed throughout the transportation system. The processor developing a model representing passenger usage of a portion of the transportation system. The model comprises nodes that each represent a geographical area of the transportation network, and links that represent transportation routes that connect two nodes. The system determines link utilization rates for each of the links by applying the passenger statistics to the model, and it generates an observation report comprising an origin-destination matrix for at least the portion of the transportation system so that the origin-destination matrix comprises the determined link utilization rates.
    Type: Grant
    Filed: December 11, 2014
    Date of Patent: January 3, 2017
    Assignee: XEROX CORPORATION
    Inventors: John C. Handley, Qing Zhao, Jeffrey David Kingsley
  • Publication number: 20160374223
    Abstract: A package module includes a circuit board, an electronic component disposed on the circuit board, a frame disposed next to at least one side of the electronic component, and an encapsulant. A gap is formed between the frame and the electronic component. The encapsulant includes a first portion covering at least a part of the circuit board, and a second portion filling into at least a part of the gap. The first portion has a first height relative to the circuit board, and the second portion has a second height relative to the circuit board, in which the second height is greater than the first height.
    Type: Application
    Filed: March 10, 2016
    Publication date: December 22, 2016
    Inventors: Hai-Bin XU, Tao WANG, Shou-Yu HONG, Zhen-Qing ZHAO
  • Publication number: 20160365306
    Abstract: A method of fabricating a package module includes placing a pin frame having plural pins on a circuit substrate; bonding the pins to corresponding bonding areas on a circuit substrate, thereby connecting the pins to the bonding areas; cutting off a connecting portion of the pin frame; and bending the pins to be vertical to the circuit substrate. By placing the pins on the corresponding bonding areas on the circuit substrate through the pin frame, and then cutting off the connecting portion of the pin frame and bending the pins, the efficiency of assembling the package module can be greatly promoted.
    Type: Application
    Filed: March 14, 2016
    Publication date: December 15, 2016
    Inventors: Kai LU, Zhen-Qing ZHAO, Tao WANG
  • Publication number: 20160358837
    Abstract: A package module includes a power module, a first thermal dissipating component and a packaging plastic. The power module includes a substrate and at least one power semiconductor component disposed on the substrate. The first thermal dissipating component is disposed over the power module. The packaging plastic covers the power module and the first thermal dissipating component, wherein a portion of the first thermal dissipating component is exposed from the packaging plastic.
    Type: Application
    Filed: March 16, 2016
    Publication date: December 8, 2016
    Inventors: Le LIANG, Shou-Yu HONG, Zhen-Qing ZHAO
  • Publication number: 20160353296
    Abstract: A communication device includes a first network interface configured to communicate in a first network according to a first communication protocol, and a second network interface configured to communicate in a second network according to a second communication protocol. The first communication protocol defines a periodically repeating frame. The communication device predicts one or more subframes in the frame in which a serving base station in the first network will not transmit to the communication device because of poor channel conditions using at least one of i) measured channel quality in the one or more subframes, and ii) instructions sent to the communication device regarding channel quality measurements that are to be reported. In response to predicting the one or more subframes, operation of the first network interface is suspended during those subframes, and operation of the second network interface is enabled during at least one of those subframes.
    Type: Application
    Filed: August 15, 2016
    Publication date: December 1, 2016
    Inventors: Qing ZHAO, Yakun SUN, Yi-Ling CHAO, Leilei SONG, Hui-Ling LOU
  • Publication number: 20160352247
    Abstract: A power module packaging structure includes a first conducting layer, a first insulating layer, a second conducting layer, a first power device, and a first controlling device. The first insulating layer is disposed above the first conducting layer. The second conducting layer is disposed above the first insulating layer. The first power device is disposed on the first conducting layer. The first controlling device is disposed on the second conducting layer and used for controlling the first power device. The first conducting layer, the second conducting layer, the first power device, and the first controlling device form a loop. A direction of a current which flows through the first conducting layer in the loop is opposite to a direction of a current which flows through the second conducting layer in the loop.
    Type: Application
    Filed: May 30, 2016
    Publication date: December 1, 2016
    Inventors: Zeng LI, Jun-Cheng LU, Tao WANG, Zheng-Fen WAN, Zhen-Qing ZHAO
  • Patent number: 9503245
    Abstract: Various methods and apparatus are disclosed for mitigating interference between communications between different radio access technologies in a communication device. Methods and apparatus include communicating between a first communication device and a second communication device according to a first communication protocol, and communicating between the first communication device and a third communication device according to a second communication protocol. The methods and apparatus further include determining a first time interval associated with when data is to be transmitted between the first communication device and the second communication device according to the first communications protocol. The methods and apparatus also include sending to the third communication device, an indication of a second time interval to prompt the third communication device not transmit to the first communication device during the second time interval, wherein the second time interval corresponds to the first time interval.
    Type: Grant
    Filed: December 20, 2013
    Date of Patent: November 22, 2016
    Assignee: Marvell International Ltd.
    Inventors: Jihwan P. Choi, Hui-Ling Lou, Leilei Song, Yakun Sun, Qing Zhao