Patents by Inventor Dajun Zhang

Dajun Zhang 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: 20200323016
    Abstract: A layer 2 processing method, a CU and a DU are provided. The layer 2 processing method includes: sending channel reconstruction indication information to the DU; receiving a response message sent by the DU; generating an RRC reconfiguration message based on the response message; and sending the RRC reconfiguration message to a UE, and performing, by the UE, a corresponding operation.
    Type: Application
    Filed: September 19, 2018
    Publication date: October 8, 2020
    Applicant: CHINA ACADEMY OF TELECOMMUNICATIONS TECHNOLOGY
    Inventors: Dajun ZHANG, Aijuan LIU, Jiancheng SUN
  • Patent number: 10773216
    Abstract: Disclosed are a method for preparing a high-strength anti-pollution anti-bacterial hollow fiber nano-filtration membrane and a product prepared by the method. The method comprises: S1, a chemical crosslinking reaction: placing an ultra-filtration base membrane in an acidic aqueous solution of glucose or an aqueous solution of phytic acid for a chemical crosslinking reaction to obtain a nano-filtration membrane; S2, a neutralization reaction immersing the nano-filtration membrane obtained in step S1 in an aqueous solution of alkali for the neutralization reaction, then washing the membrane to be neutral; S3, loading inorganic antibacterial agent: placing the membrane obtained in step S2 in an inorganic anti-bacterial agent solution for complexation, thereby obtaining a high-strength anti-pollution anti-bacterial hollow fiber nano-filtration membrane.
    Type: Grant
    Filed: June 1, 2016
    Date of Patent: September 15, 2020
    Assignee: Guizhou Material Industrial Technology Institute
    Inventors: Zhenyu Cui, Gaoyi Xie, Shuhao Qin, Jingkui Yang, Kaizhou Zhang, Dajun Luo, Huiju Shao, Jinbo Jin
  • Publication number: 20200261588
    Abstract: Disclosed are an intermediate drug having synergistic anticancer activity and a polyethylene glycol-coupled synergistic anticancer drug, and a method preparing therefor and use thereof. The intermediate drug has the general structural formula of (I), and the polyethylene glycol-coupled synergistic anticancer drug has the general structural formula of (II). The drugs achieve the combined medication of various anticancer drugs and avoid the toxic reaction caused by the interaction among the drugs or by the pharmacokinetics of the drugs when taking various anticancer drugs, facilitate overcoming the multidrug resistance of cancers, have a synergistic effect, and can be used for preparing anticancer medicaments and for treating cancers.
    Type: Application
    Filed: January 22, 2018
    Publication date: August 20, 2020
    Applicant: Chongqing Upgra Biological Sci. & Tech., Ltd.
    Inventors: Gaoquan LI, Bin WANG, Dajun LI, Qian ZHANG, Lei HUANG, Maofen CHEN, Xiaodan WU, Liangyan PENG, Tingting HE, Yanyan ZHANG, Yun TANG, Huan LIU, Jvyuan SHUI, Cuifang ZHANG, Jianhuan LI
  • Publication number: 20200162998
    Abstract: Disclosed are a system message notification and sending method and apparatus. The method comprises: a CU determines system message relevant information; and the CU sends the system message relevant information to a DU. The DU receives the system message relevant information sent by the CU; and the DU notifies a terminal of the information. The present application provides an access control and system message processing solution under a CU-DU architecture, and a CU can provide sufficient auxiliary information to a DU, and thus the DU can generate suitable system information according to same. The two coordinate to provide a service to a UE, and the system efficiency is improved and a good user experience is ensured.
    Type: Application
    Filed: April 23, 2018
    Publication date: May 21, 2020
    Inventors: Dajun ZHANG, Aijuan LIU, Ying WANG
  • Publication number: 20200107229
    Abstract: Provided in embodiments of the present disclosure a QoS processing method and a QoS processing device. The QoS processing method includes transmitting, by a target base station, a first message to a source base station. The first message at least comprises first information and second information; the first information is configured for notifying the source base station that the target base station is incapable of meeting a QoS requirement on one or more flows of a UE; and the second information is information of a QoS parameter capable of being accepted by the target base station and recommended with respect to the one or more flows.
    Type: Application
    Filed: February 26, 2018
    Publication date: April 2, 2020
    Applicant: CHINA ACADEMY OF TELECOMMUNICATIONS TECHNOLOGY
    Inventors: Aijuan LIU, Dajun ZHANG, Fangli XU
  • Patent number: 10609710
    Abstract: A method for transmitting a radio resource control message, a network side central unit, and a network side distributed unit are provided. The method for transmitting a radio resource control (RRC) message includes: mapping the radio resource control (RRC) message into a data stream of a level corresponding to a user plane; and sending effective time and a logical channel identifier of the RRC message and the data stream to a corresponding network side distributed unit (DU) through the user plane or a control plane.
    Type: Grant
    Filed: February 14, 2018
    Date of Patent: March 31, 2020
    Assignee: CHINA ACADEMY OF TELECOMMUNICATIONS TECHNOLOGY
    Inventors: Aijuan Liu, Dajun Zhang, Fangli Xu
  • Patent number: 10560913
    Abstract: Disclosed are a method, a device, and a system for the acquisition of control node information. In embodiments of the present invention, on the basis of information transmitted by a base station, a relay node acquires control node information on user terminal access attached in the information acquired, thereby allowing a relay node in a system placed after the introducing relay node to be informed of the control node information on user terminal access.
    Type: Grant
    Filed: December 1, 2012
    Date of Patent: February 11, 2020
    Assignee: CHINA ACADEMY OF TELECOMMUNICATIONS TECHNOLOGY
    Inventors: Beibei Jia, Dajun Zhang, Yi Yang, Wei Bao
  • Publication number: 20200029321
    Abstract: A method for UE capability negotiation, a UE and a base station are provided. The UE reports individual capabilities of the UE for respective radio access networks in multiple systems and a merged capability of the UE for all radio access networks in the multiple systems.
    Type: Application
    Filed: September 28, 2017
    Publication date: January 23, 2020
    Applicant: CHINA ACADEMY OF TELECOMMUNICATIONS TECHNOLOGY
    Inventors: Dajun ZHANG, Fangli Xu, Chandrika Kumudinie Worrall
  • Publication number: 20190380084
    Abstract: A method and a system for rail transit communication. The method includes: selecting a second target FSO transceiver from the FSO transceivers that are currently located within a signal coverage of a target FSO base station, in response to detecting that a first target free-space-optics (FSO) transceiver moves out of the signal coverage of the target FSO base station when data communication between the target FSO base station and the target user terminal is performed via the first target FSO transceiver, where the target FSO base station is one of the FSO base stations located on the rail; and maintaining the data communication between the target FSO base station and the target user terminal, by using the second target FSO transceiver. Handover among the base stations is reduced for user equipment, data communication rate is increased, and communication experience of passengers can be improved.
    Type: Application
    Filed: May 17, 2017
    Publication date: December 12, 2019
    Applicants: CRRC ZHUZHOU ELECTRIC LOCOMOTIVE RESEARCH INSTITUTE CO., LTD., NEW JERSEY INSTITUTE OF TECHNOLOGY
    Inventors: Jianghua FENG, Mina TAHERI, Qiang FAN, Nirwan ANSARI, Roberto ROJAS-CESSA, Mengchu ZHOU, Gaohua CHEN, Dajun WANG, Jun TANG, Tairan ZHANG
  • Publication number: 20190357105
    Abstract: A method and apparatus for reducing interruption delay, and a user device. The method is: in response to an anchor point change operation, a source main network entity of a source network side in a mobile communication network initiates an anchor point change request to a target main network entity of a target network side; on the basis of the received anchor point change request, the target main network entity configures and obtains target network side configuration parameters; on the basis of the received target network side configuration parameters, the source main network entity generates a radio resource control message for the target network side; the target main network entity obtains an anchor point reconstruction indication message generated and transmitted by a multi-connection user device on the basis of the radio resource control message, and enters a target network side configuration effective state for target network side reconstruction.
    Type: Application
    Filed: February 5, 2018
    Publication date: November 21, 2019
    Applicant: China Academy of Telecommunications Technology
    Inventors: Dajun ZHANG, Jiamin LIU
  • Publication number: 20190357209
    Abstract: A method for transmitting a radio resource control message, a network side central unit, and a network side distributed unit are provided. The method for transmitting a radio resource control (RRC) message includes: mapping the radio resource control (RRC) message into a data stream of a level corresponding to a user plane; and sending effective time and a logical channel identifier of the RRC message and the data stream to a corresponding network side distributed unit (DU) through the user plane or a control plane.
    Type: Application
    Filed: February 14, 2018
    Publication date: November 21, 2019
    Applicant: China Academy of Telecommunications Technology
    Inventors: Aijuan LIU, Dajun ZHANG, Fangli XU
  • Publication number: 20190335369
    Abstract: A method for network entity handover, a terminal, and a network entity device are disclosed by the present disclosure. The method includes: receiving a new configuration parameter of a second network entity that is connected to a terminal, the new configuration parameter being transmitted by a first network entity that is connected to the terminal, the new configuration parameter being configured by the second network entity according to indication information of an anchor change operation of changing an anchor from the first network entity to the second network entity, and the indication information being transmitted by the first network entity; and when the new configuration parameter takes effect, not performing reset and/or reestablishment of bottom layer transmission, and transmitting an anchor change confirmation message to the second network entity.
    Type: Application
    Filed: February 12, 2018
    Publication date: October 31, 2019
    Inventors: Dajun ZHANG, Fangli XU
  • Publication number: 20190282968
    Abstract: Disclosed are a method for preparing a high-strength anti-pollution anti-bacterial hollow fiber nano-filtration membrane and a product prepared by the method. The method comprises: S1, a chemical crosslinking reaction: placing an ultra-filtration base membrane in an acidic aqueous solution of glucose or an aqueous solution of phytic acid for a chemical crosslinking reaction to obtain a nano-filtration membrane; S2, a neutralization reaction immersing the nano-filtration membrane obtained in step S1 in an aqueous solution of alkali for the neutralization reaction, then washing the membrane to be neutral; S3, loading inorganic antibacterial agent: placing the membrane obtained in step S2 in an inorganic anti-bacterial agent solution for complexation, thereby obtaining a high-strength anti-pollution anti-bacterial hollow fiber nano-filtration membrane.
    Type: Application
    Filed: June 1, 2016
    Publication date: September 19, 2019
    Applicant: GUIZHOU MATERIAL INDUSTRIAL TECHNOLOGY INSTITUTE
    Inventors: Zhenyu Cui, Gaoyi Xie, Shuhao Qin, Jingkui Yang, Kaizhou Zhang, Dajun Luo, Huiju Shao, Jinbo Jin
  • Publication number: 20190182883
    Abstract: The present application relates to the technical field of mobile communications, and particularly relates to a cell configuration method and device, used to prevent severe data interruption and ensure normal communication for user equipment. The method comprises: in a scenario of jointly employing an MeNB and an SeNB, a first base station sends SCG configuration information to UE to perform SCG configuration; if the UE Determines that the SCG configuration fails, the UE sends to a network side SCG reconfiguration failure information; and then if an MCG configuration succeeds, then the UE and the network side keep the original SCG configuration information sent at the previous iteration unchanged, else an SCG release is triggered. In this way, when only an SCG configuration fails, the present invention uses original SCG configuration information instead of frequently launching RRC re-establishment, such that severe data interruption is effectively avoided.
    Type: Application
    Filed: July 24, 2017
    Publication date: June 13, 2019
    Applicant: China Academy of Telecommunications Technology
    Inventors: Yuan HE, Dajun ZHANG, Haiyang QUAN
  • Publication number: 20190164575
    Abstract: A system for combining data includes one or more processors that are, individually or collectively, configured to receive video data recorded by at least one sensor and operation data of a movable object that carries the at least one sensor, associate the operation data with the video data, and store the associated operation data and the video data in a video file. The operation data indicates one or more operation states of the movable object during a time period when the video data is recorded.
    Type: Application
    Filed: January 8, 2019
    Publication date: May 30, 2019
    Inventors: Gaoping BAI, Dajun HUO, Ruoying ZHANG
  • Publication number: 20190166528
    Abstract: A data transmission method, a user equipment (UE), a base station and a system are provided. The method includes maintaining transmission of data of a UE by an original base station in a handover process in which the UE hands over from the original base station to a target base station; and transmitting the data to the target base station by the original base station when maintaining the transmission of the data of the UE.
    Type: Application
    Filed: April 25, 2017
    Publication date: May 30, 2019
    Applicant: CHINA ACADEMY OF TELECOMMUNICATIONS TECHNOLOGY
    Inventor: Dajun ZHANG
  • Patent number: 10278115
    Abstract: The bearer admission control method includes: when an MeNB needs to perform bearer separation with an SeNB with respect to an identical UE, sending, by the MeNB, an SeNB addition request message to the SeNB, the SeNB addition request message carrying information about a list of E-RABs corresponding to the UE to be admitted by the SeNB and indication information indicating whether or not data is to be distributed for the bearer in a specific direction, the specific direction being an uplink or a downlink direction; and receiving, by the MeNB, a feedback message from the SeNB to acquire a bearer admission result of the SeNB, configuring, by the MeNB, connection for the UE in the case that the MeNB has accepted the bearer admission result of the SeNB, and otherwise, sending, by the MeNB, a message for rejecting the bearer admission result of the SeNB to the SeNB.
    Type: Grant
    Filed: July 16, 2015
    Date of Patent: April 30, 2019
    Assignee: CHINA ACADEMY OF TELECOMMUNICATIONS TECHNOLOGY
    Inventors: Yumin Wu, Dajun Zhang
  • Patent number: 10231156
    Abstract: A data transmission method, a data transmission device, a data transmission control method and a data transmission control device are provided to adjust measurement gap configurations for multiple base stations communicating with an identical user equipment (UE), thereby preventing packet loss during measurement performed by the UE. The data transmission control method includes: determining, by a source base station communicating with the UE, a measurement gap configuration used by the source base station; and transmitting, by the source base station, the measurement gap configuration to the UE and a target base station communicating with the UE, to instruct the target base station and the UE to perform data transmissions in accordance the measurement gap configuration.
    Type: Grant
    Filed: March 19, 2015
    Date of Patent: March 12, 2019
    Assignee: China Academy Of Telecommunications Technology
    Inventors: Yumin Wu, Dajun Zhang
  • Patent number: 10225820
    Abstract: The present invention discloses a method, an apparatus and a system for configuring Multimedia Broadcast Multicast Service (MBMS) control information, and the method includes: a network side apparatus broadcasts Multicast Control Channel (MCCH) configuration information to the terminal by Broadcast Control Channel (BCCH), and the MCCH configuration information is received by the terminal; the network side apparatus sends Multicast Broadcast Single Frequency Network (MBSFN) region configuration information to the terminal by the MCCH channel; the MBSFN region configuration information is received by the terminal according to the MCCH configuration information; the network side apparatus sends MBMS service data to the terminal by Multicast Traffic Channel (MTCH); the MBMS service data is received by the terminal according to the MBSFN region configuration information.
    Type: Grant
    Filed: August 11, 2010
    Date of Patent: March 5, 2019
    Assignee: CHINA ACADEMY OF TELECOMMUNICATIONS TECHNOLOGY
    Inventors: Dajun Zhang, Jing Liang
  • Patent number: 10154533
    Abstract: Provided are a data packet processing method and device, which are used for solving the problem of how to process a PDCP SDU data packet of a split bearer in the process of normally transmitting the PDCP SDU data packets of the split bearer based on a bearer splitting scenario and when an auxiliary eNB providing a service for the split bearer changes, thereby increasing the working efficiency of aggregating eNBs and the utilization rate of resources. The method of the present application comprises: determining transmission information about each packet data convergence protocol (PDCP) service data unit (SDU) data packet of a bearer in a bearer splitting scenario which is being transmitted; and processing the data packet according to the transmission information about each data packet.
    Type: Grant
    Filed: March 4, 2015
    Date of Patent: December 11, 2018
    Assignee: China Academy of Telecommunications Technology
    Inventors: Zhe Fu, Dajun Zhang