Patents by Inventor Shouchang Niu

Shouchang Niu 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).

  • Upgrading method, system and apparatus of low-density wavelength division multiplexing system
    Patent number: 8380070
    Abstract: An upgrading method, a system, and an apparatus of a low-density wavelength division multiplexing (WDM) system are provided. The method includes: detecting an output wavelength shift of a wavelength conversion unit, and adjusting an output wavelength of the wavelength conversion unit having the output wavelength shift higher than a threshold, so that the output wavelength shift of the wavelength conversion unit is lower than the threshold; adjusting an adjustable interleaved demultiplexer, until requirements for a demultiplexing parameter of a high-density WDM system are met. Thus, the problem that services are interrupted when a low-density MDM system is upgraded to a high-density MDM system is solved. A WDM system, and a wavelength multiplexing/demultiplexing apparatus and method are also provided.
    Type: Grant
    Filed: February 10, 2010
    Date of Patent: February 19, 2013
    Assignee: Huawei Technologies Co., Ltd.
    Inventors: Congqi Li, Zhiyong Huang, Zhiwen Chang, Yuzhi Jin, Da He, Jianmei Zhang, Shouchang Niu, Shixing Li, Tianhai Chang, Jinghua Song
  • UPGRADING METHOD, SYSTEM AND APPARATUS OF LOW-DENSITY WAVELENGTH DIVISION MULTIPLEXING SYSTEM
    Publication number: 20100142960
    Abstract: An upgrading method, a system, and an apparatus of a low-density wavelength division multiplexing (WDM) system are provided. The method includes: detecting an output wavelength shift of a wavelength conversion unit, and adjusting an output wavelength of the wavelength conversion unit having the output wavelength shift higher than a threshold, so that the output wavelength shift of the wavelength conversion unit is lower than the threshold; adjusting an adjustable interleaved demultiplexer, until requirements for a demultiplexing parameter of a high-density WDM system are met. Thus, the problem that services are interrupted when a low-density MDM system is upgraded to a high-density MDM system is solved. A WDM system, and a wavelength multiplexing/demultiplexing apparatus and method are also provided.
    Type: Application
    Filed: February 10, 2010
    Publication date: June 10, 2010
    Applicant: HUAWEI TECHNOLOGIES CO., LTD.
    Inventors: Congqi LI, Zhiyong HUANG, Zhiwen CHANG, Yuzhi JIN, Da HE, Jianmei ZHANG, Shouchang NIU, Shixing LI, Tianhai CHANG, Jinghua SONG