Patents by Inventor Dejian Xu

Dejian Xu 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).

  • Method, Apparatus, and System for Selecting Clock Source, and Storage Medium
    Publication number: 20220190945
    Abstract: A method includes receiving, by a first node on a first port of the first node, a first packet from a second node; and when the first packet carries a first flag, avoid selecting, by the first node and when selecting a clock source, a clock source corresponding to the first port, where the first flag indicates that time synchronization of the second node is uncertain.
    Type: Application
    Filed: March 4, 2022
    Publication date: June 16, 2022
    Inventors: Jingfei Lv, Dejian Xu, Xiaoxia Li
  • Time synchronization method and apparatus
    Patent number: 10673551
    Abstract: A time synchronization method includes, a boundary device of a third-party network side receives a synchronization packet carrying a time synchronization offset and is delivered by a boundary device of an upstream network side on the basis that boundary devices in an entire network are all boundary clock (BC) devices, where the time synchronization offset is a time offset between a time domain of the upstream network and a time domain of the third-party network, and the boundary device of the third-party network side transparently transmits the synchronization packet carrying the time synchronization offset to a boundary device of a downstream network side such that the boundary device of the downstream network side performs time synchronization with the boundary device of the upstream network side according to the time synchronization offset. Thus time synchronization among multiple time domains in a network.
    Type: Grant
    Filed: June 16, 2017
    Date of Patent: June 2, 2020
    Assignee: HUAWEI TECHNOLOGIES CO., LTD.
    Inventors: Lizhong Qiao, Yawei Zhang, Huanle Wang, Dejian Xu
  • Time Synchronization Method and Apparatus
    Publication number: 20170288802
    Abstract: A time synchronization method includes, a boundary device of a third-party network side receives a synchronization packet carrying a time synchronization offset and is delivered by a boundary device of an upstream network side on the basis that boundary devices in an entire network are all boundary clock (BC) devices, where the time synchronization offset is a time offset between a time domain of the upstream network and a time domain of the third-party network, and the boundary device of the third-party network side transparently transmits the synchronization packet carrying the time synchronization offset to a boundary device of a downstream network side such that the boundary device of the downstream network side performs time synchronization with the boundary device of the upstream network side according to the time synchronization offset. Thus time synchronization among multiple time domains in a network.
    Type: Application
    Filed: June 16, 2017
    Publication date: October 5, 2017
    Inventors: Lizhong Qiao, Yawei Zhang, Huanle Wang, Dejian Xu
  • Process and Apparatus for Optimized Combination of Purification and Separation of MTO Reaction Gas Containing Catalyst Fine Powder
    Publication number: 20130239810
    Abstract: The invention relates to a process and an apparatus for optimized combination of purification and separation of MTO reaction gas containing catalyst fine powder.
    Type: Application
    Filed: April 13, 2011
    Publication date: September 19, 2013
    Inventors: Qiang Yang, Hualin Wang, Zhiming Li, Yanhong Zhang, Xin Cui, Dejian Xu, Wenjie Lv, Xiaomei Xu