Patents by Inventor Yongbo Zeng

Yongbo Zeng 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: 20170289870
    Abstract: A method for providing synchronization information includes acquiring a first synchronization information from a synchronization source, and transmitting a second synchronization information derived from the first synchronization information when the UE experiences a coverage change.
    Type: Application
    Filed: March 27, 2017
    Publication date: October 5, 2017
    Inventors: Bin Liu, Yu Cai, Yongbo Zeng, Jian Wang
  • 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: 20170265230
    Abstract: A method of performing a random access procedure includes randomly selecting a backoff time from within a backoff window ranging from 0 to a specified multiple of a random access preamble unit, waiting until a time initialized with the backoff time expires, and retransmitting a random access preamble.
    Type: Application
    Filed: March 7, 2017
    Publication date: September 14, 2017
    Inventors: Bin Liu, Yongbo Zeng, Jian Wang, Guorong Li, Yu Cai
  • 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
  • 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
  • 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
  • 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: 20160234858
    Abstract: Provided are a resource scheduling method and device; the method comprises: scheduling resource according to the transmission demands; and configuring a frame structure with a non-fixed frame length matching the scheduled resource. The method according to the present invention prevents wastage of wireless resources caused by competition conflict or random back-off, and can better adapt to the demands of different kinds of data services with varied features in the future.
    Type: Application
    Filed: April 15, 2016
    Publication date: August 11, 2016
    Inventors: DONGSHAN BAO, JING WANG, SHENFA LIU, YONGBO ZENG, YUBAO ZHOU, ZHIGANG YAN, JUN LEI, LIJUN PAN, FEIFEI WANG
  • Patent number: 9351315
    Abstract: Provided are a resource scheduling method and device; the method comprises: scheduling resource according to the transmission demands; and configuring a frame structure with a non-fixed frame length matching the scheduled resource. The method according to the present invention prevents wastage of wireless resources caused by competition conflict or random back-off, and can better adapt to the demands of different kinds of data services with varied features in the future.
    Type: Grant
    Filed: March 22, 2012
    Date of Patent: May 24, 2016
    Assignee: BEIJING NUFRONT MOBILE MULTIMEDIA TECHNOLOGY CO. LTD.
    Inventors: Dongshan Bao, Jing Wang, Shenfa Liu, Yongbo Zeng, Yubao Zhou, Zhigang Yan, Jun Lei, Lijun Pan, Feifei Wang
  • 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
  • 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
  • Publication number: 20140064206
    Abstract: Provided are a resource scheduling method and device; the method comprises: scheduling resource according to the transmission demands; and configuring a frame structure with a non-fixed frame length matching the scheduled resource. The method according to the present invention prevents wastage of wireless resources caused by competition conflict or random back-off, and can better adapt to the demands of different kinds of data services with varied features in the future.
    Type: Application
    Filed: March 22, 2012
    Publication date: March 6, 2014
    Inventors: Dongshan Bao, Jing Wang, Shenfa Liu, Yongbo Zeng, Yubao Zhou, Zhigang Yan, Jun Lei, Lijun Pan, Feifei Wang