Patents by Inventor Qun Zhao

Qun 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).

  • Publication number: 20170318551
    Abstract: A user equipment apparatus for supporting D2D (user equipment-to-user equipment) communication, the user equipment apparatus being situated in coverage of a base station, including a control unit configured to determine a transmission duration for which a D2D synchronization signal is transmitted according to a parameter related to transmission of the D2D synchronization signal; and a transmission unit configured to transmit the D2D synchronization signal within the determined transmission duration of the D2D synchronization signal.
    Type: Application
    Filed: October 9, 2015
    Publication date: November 2, 2017
    Applicant: NTT DOCOMO, INC.
    Inventors: Shimpei Yasukawa, Satoshi Nagata, Yongbo Zeng, Qun Zhao, Yongsheng Zhang
  • Patent number: 9794895
    Abstract: A transmission power control method in a mobile communication system including a user apparatus and a base station is provided. The method enables the base station to control transmission power of a discovery signal of the user apparatus. The method includes estimating a number of the user apparatuses transmitting discovery signals by monitoring the discovery signals transmitted from the user apparatuses, by referring to power class setting information which associates the number of the user apparatuses transmitting the discover signals with a power class used for determining transmission power information of the discovery signal in the user apparatus, determining the power class associated with the number of the estimate user apparatuses, and transmitting the determined power class to the user apparatus.
    Type: Grant
    Filed: February 15, 2017
    Date of Patent: October 17, 2017
    Assignee: NTT DOCOMO, INC.
    Inventors: Satoshi Nagata, Qun Zhao, Yongbo Zeng, Yongsheng Zhang
  • Patent number: 9794767
    Abstract: To enable a user terminal that receives a discovery signal of another user terminal for performing Type 1 discovery to synthesize and receive the discovery signal, a user terminal capable of executing inter-terminal direct signal transmission/reception has a selecting section that selects a discovery signal transmission resource at the next period for each period, and a transmission section that transmits information on the discovery signal transmission resource at the next period, together with the discovery signal.
    Type: Grant
    Filed: December 24, 2014
    Date of Patent: October 17, 2017
    Assignee: NTT DOCOMO, INC.
    Inventors: Hiroki Harada, Qun Zhao, Yongbo Zeng, Yongsheng Zhang
  • Patent number: 9781584
    Abstract: A distance estimation method for, by causing a first user apparatus to receive a discovery signal from a second user apparatus, estimating a distance between the first user apparatus and the second user apparatus is provided. The distance estimation method includes a step of receiving from the second user apparatus the discovery signal including transmission power information of the discovery signal, a step of obtaining the transmission power information from the discovery signal, and a step of estimating the distance between the first user apparatus and the second user apparatus from receive power information of the discovery signal at the first user apparatus and the transmission power information.
    Type: Grant
    Filed: February 4, 2014
    Date of Patent: October 3, 2017
    Assignee: NTT DOCOMO, INC.
    Inventors: Satoshi Nagata, Qun Zhao, Yongbo Zeng, Yongsheng Zhang
  • Publication number: 20170187558
    Abstract: A user apparatus is provided. The user apparatus includes a cyclic prefix length detection unit configured to detect a cyclic prefix length used by a user apparatus of a neighbor cell or out of coverage; and an interference detection unit configured to detect interference caused by a cyclic prefix length difference, a synchronization timing difference, or collision of resources used for signal transmission. Further, a base station is provided. The base station includes a reception unit configured to receive from a user apparatus an interference result caused by a cyclic prefix length difference; a resource allocation unit configured to set resources based on the received interference result; and a transmission unit configured to transmit the set resource information to the user apparatus.
    Type: Application
    Filed: April 7, 2015
    Publication date: June 29, 2017
    Applicant: NTT DOCOMO, INC.
    Inventors: Shimpei Yasukawa, Hiroki Harada, Yongbo Zeng, Qun Zhao, Yongsheng Zhang
  • Publication number: 20170188261
    Abstract: User equipment for receiving a discovery signal to be used for inter-user equipment discovery includes a discovery signal receiver that receives the discovery signal transmitted, within a resource pool for transmitting the discovery signal, from any other user equipment; a collision detector that detects collision of discovery signals; and a reporting unit that reports a detected result of the collision to a base station.
    Type: Application
    Filed: April 9, 2015
    Publication date: June 29, 2017
    Applicant: NTT DOCOMO, INC.
    Inventors: Hiroki Harada, Shimpei Yasukawa, Satoshi Nagata, Qun Zhao, Yongbo Zeng, Yongsheng Zhang
  • Patent number: 9689939
    Abstract: This disclosure describes, in one aspect, a device that includes a dual-tuned birdcage coil. The dual-tuned birdcage coil generally includes an inner multinuclear coil and a plurality of outer 1H coils separated from the inner coil. Also, the dual-tuned birdcage coil is generally configured so that the inner coil may be tuned independently of one or more of the outer coils. In some embodiments, the device may be configured to provide inductive coupling between the inner coil and the plurality of outer coils. In some embodiments, the multinuclear coil can include 31P, 13C, 23Na, 15N, 17O, or 19F, etc. In another aspect, this disclosure describes using the device to a generate magnetic resonance in a target. In some of cases, the method can further include creating an image of the target from the magnetic resonance generated by the device.
    Type: Grant
    Filed: October 8, 2013
    Date of Patent: June 27, 2017
    Assignee: University of Georgia Research Foundation, Inc.
    Inventors: William M. Potter, Qun Zhao
  • Publication number: 20170164303
    Abstract: A transmission power control method in a mobile communication system including a user apparatus and a base station is provided. The method enables the base station to control transmission power of a discovery signal of the user apparatus. The method includes estimating a number of the user apparatuses transmitting discovery signals by monitoring the discovery signals transmitted from the user apparatuses, by referring to power class setting information which associates the number of the user apparatuses transmitting the discover signals with a power class used for determining transmission power information of the discovery signal in the user apparatus, determining the power class associated with the number of the estimate user apparatuses, and transmitting the determined power class to the user apparatus.
    Type: Application
    Filed: February 15, 2017
    Publication date: June 8, 2017
    Applicant: NTT DOCOMO, INC.
    Inventors: Satoshi Nagata, Qun Zhao, Yongbo Zeng, Yongsheng Zhang
  • Publication number: 20170142764
    Abstract: A user equipment apparatus for performing user equipment-to-user equipment communication includes a synchronization signal detection unit configured to detect a user equipment-to-user equipment synchronization signal transmitted from a user equipment apparatus in another cell or another carrier; a control unit configured to set reception timing based on the user equipment-to-user equipment synchronization signal; and a reception unit configured to receive scheduling information or a discovery signal transmitted from the user equipment apparatus in the other cell or the other carrier within a time window defined based on the user equipment-to-user equipment synchronization signal.
    Type: Application
    Filed: April 8, 2015
    Publication date: May 18, 2017
    Applicant: NTT DOCOMO, INC.
    Inventors: Shimpei Yasukawa, Hiroki Harada, Satoshi Nagata, Qun Zhao
  • Patent number: 9629023
    Abstract: A user apparatus that transmits and receives a discovery signal, including: collision detection means that detects a collision in a received discovery signal; collision notification means that, when a collision of a received discovery signal is detected by the collision detection means, transmits collision information indicating that a collision occurs in the received discovery signal; collision information reception means that receives collision information; and collision determination means that determines whether a collision occurs in a transmitted discovery signal transmitted by the user apparatus based on the collision information received by the collision information reception means.
    Type: Grant
    Filed: March 13, 2014
    Date of Patent: April 18, 2017
    Assignee: NTT DOCOMO, INC.
    Inventors: Satoshi Nagata, Qun Zhao, Yongbo Zeng, Yongsheng Zhang
  • Publication number: 20170013437
    Abstract: To enable a user terminal that receives a discovery signal of another user terminal for performing Type 1 discovery to synthesize and receive the discovery signal, a user terminal capable of executing inter-terminal direct signal transmission/reception has a selecting section that selects a discovery signal transmission resource at the next period for each period, and a transmission section that transmits information on the discovery signal transmission resource at the next period, together with the discovery signal.
    Type: Application
    Filed: December 24, 2014
    Publication date: January 12, 2017
    Applicant: NTT DOCOMO, INC.
    Inventors: Hiroki Harada, Qun Zhao, Yongbo Zeng, Yongsheng Zhang
  • Publication number: 20170006457
    Abstract: To reduce interference (in-band emission) to PUCCH by an inter-terminal discovery signal when the PUCCH and inter-terminal discovery signal are subjected to frequency division multiplexing, a user terminal of the present invention performs frequency division multiplexing on the PUCCH and the inter-terminal discovery signal to transmit. Further, the user terminal of the invention is provided with a reception section that receives limited resource region information indicative of a limited resource region obtained by removing an adjacent region of a frequency resource region where the PUCCH is allocated from a radio base station, a determining section that determines a distance between the radio base station and the user terminal, and a selecting section that selects an allocation resource of the inter-terminal discovery signal from the limited resource region when the determining section determines that the distance is relatively close.
    Type: Application
    Filed: January 22, 2015
    Publication date: January 5, 2017
    Applicant: NTT DOCOMO, INC.
    Inventors: Hiroki Harada, Qun Zhao, Yongbo Zeng, Yongsheng Zhang
  • Publication number: 20160294595
    Abstract: The present invention is designed so that, in a radio communication system in which inter-terminal communication is carried out, the impact of inter-symbol interference due to the delay of inter-terminal discovery signals is reduced. The radio communication method of the present invention is used in a radio communication system in which each user terminal transmits the inter-terminal discovery signal in a transmission duration of a predetermined period. A radio base station determines the cyclic prefix (CP) length configuration for use in the transmission duration, and transmits cyclic prefix (CP) length configuration information which represents the CP length configuration. Each user terminal transmits the inter-terminal discovery signal based on the CP length configuration information.
    Type: Application
    Filed: October 16, 2014
    Publication date: October 6, 2016
    Applicant: NTT DOCOMO, INC.
    Inventors: Hiroki Harada, Yongbo Zeng, Qun Zhao, Yongsheng Zhang
  • Patent number: 9454330
    Abstract: Systems and methods for operating on a storage device are provided. A storage device command for operating on data stored in a plurality of locations in a storage device is received, with a storage device controller from processing circuitry over a bus. The storage device command is decoded with the storage device controller to identify a plurality of storage device operations associated with the storage device command. The plurality of storage device operations are executed on the data stored in the storage device without transmitting the data over the bus to the processing circuitry.
    Type: Grant
    Filed: May 22, 2014
    Date of Patent: September 27, 2016
    Assignee: MARVELL INTERNATIONAL LTD.
    Inventors: Xinhai Kang, Ming Tang, Qun Zhao, Jing Qian
  • Publication number: 20160262084
    Abstract: The present invention is designed so that, when a plurality of inter-terminal discovery signals with varying numbers of information bits are used in a radio communication system in which inter-terminal communication is carried out, user terminals can be discovered based on the inter-terminal discovery signals. According to the inter-terminal communication method of the present invention, a user terminal (#1) determines the signal format of a discovery signal based on the number of information bits of the discovery signal, transmits the discovery signal based on the signal format, and also transmits signal format information to represent this signal format. A user terminal (#2) receives the signal format information from the user terminal (#1), and, based on the signal format represented by the signal format information, detects the discovery signal.
    Type: Application
    Filed: October 16, 2014
    Publication date: September 8, 2016
    Applicant: NTT DOCOMO, INC.
    Inventors: Hiroki Harada, Yongbo Zeng, Qun Zhao, Yongsheng Zhang
  • Publication number: 20160165559
    Abstract: A user apparatus, for use in a radio communication system including a base station forming a cell, configured to receive a discovery signal of device-to-device communication, including: an information reception unit configured to receive, from a base station of a residing cell, a resource range in which a discovery signal can be transmitted in a neighbor cell; and a discovery signal reception unit configured to receive a discovery signal at a time position that is synchronized with the neighbor cell in response to receiving a synchronization signal that is synchronized with the neighbor cell within the resource range received by the information reception unit.
    Type: Application
    Filed: July 15, 2014
    Publication date: June 9, 2016
    Applicant: NTT DOCOMO, INC.
    Inventors: Satoshi Nagata, Qun Zhao, Yongsheng Zhang, Katsutoshi Kusume
  • Publication number: 20160066211
    Abstract: A user apparatus that transmits and receives a discovery signal, including: collision detection means that detects a collision in a received discovery signal; collision notification means that, when a collision of a received discovery signal is detected by the collision detection means, transmits collision information indicating that a collision occurs in the received discovery signal; collision information reception means that receives collision information; and collision determination means that determines whether a collision occurs in a transmitted discovery signal transmitted by the user apparatus based on the collision information received by the collision information reception means.
    Type: Application
    Filed: March 13, 2014
    Publication date: March 3, 2016
    Applicant: NTT DOCOMO, INC.
    Inventors: Satoshi Nagata, Qun Zhao, Yongbo Zeng, Yongsheng Zhang
  • Patent number: 9241299
    Abstract: The present invention discloses a method and a device for discovering a UE, a first UE and a base station. The method for discovering a UE comprises the steps of: monitoring, by a first UE, an uplink signal in a mobile communication system; extracting, by the first UE, first information for identifying a UE that is to be discovered and that transmits the uplink signal from the monitored uplink signal; transmitting, by the first UE, a monitoring report message carrying the first information to a base station, acquiring, by the first UE, the device ID of the UE to be discovered in accordance with the monitoring report response message and completing the discovery process of the UE. According to the present invention, it is able to discover the UE without changing a channel system of an existing system and occupying time-frequency resources of the system.
    Type: Grant
    Filed: July 16, 2013
    Date of Patent: January 19, 2016
    Assignee: NTT DOCOMO, INC.
    Inventors: Qun Zhao, Yongsheng Zhang, Hirohito Suda
  • Publication number: 20150358802
    Abstract: A distance estimation method for, by causing a first user apparatus to receive a discovery signal from a second user apparatus, estimating a distance between the first user apparatus and the second user apparatus is provided. The distance estimation method includes a step of receiving from the second user apparatus the discovery signal including transmission power information of the discovery signal, a step of obtaining the transmission power information from the discovery signal, and a step of estimating the distance between the first user apparatus and the second user apparatus from receive power information of the discovery signal at the first user apparatus and the transmission power information.
    Type: Application
    Filed: February 4, 2014
    Publication date: December 10, 2015
    Applicant: NTT DOCOMO, INC.
    Inventors: Satoshi Nagata, Qun Zhao, Yongbo Zeng, Yongsheng Zhang
  • Patent number: 9195472
    Abstract: A system includes a timer and a control module. The control module: in response to a first request for first data, determines whether the first data is stored in a non-volatile semiconductor memory (NVSM); in response to the first data not being stored in the NVSM, (i) loads the first data from a hard disk drive (HDD) and boots up a computer a first time based on the first data, and (ii) while operating in a learn mode and while loading the first data from the HDD, captures a portion of the first data in the NVSM; in response to the timer indicating an end of a period during which the computer is booted up the first time, ceases the capturing of the first data; and based on the portion of the first data captured in the NVSM during the learn mode, boots up the computer a second time.
    Type: Grant
    Filed: April 5, 2013
    Date of Patent: November 24, 2015
    Assignee: Marvell World Trade Ltd.
    Inventors: Qun Zhao, Xinhai Kang