Patents by Inventor Chunmei Lu

Chunmei Lu 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).

  • Patent number: 11984255
    Abstract: An integrated magnetic element includes an accommodating part; a current sensor disposed on the accommodating part; and a transformer disposed on the accommodating part. The transformer includes a magnetic core, a first winding including a plurality of wires, and a second winding, wherein some of the plurality of wires passes through the current sensor to shunt and detect current flowing through the first winding, and current values of the wires are detected by the current sensor to obtain a total current value of the first winding of the transformer according to a shunt ratio by the winding construction of the preset transformer.
    Type: Grant
    Filed: October 13, 2020
    Date of Patent: May 14, 2024
    Assignee: DELTA ELECTRONICS (SHANGHAI) CO., LTD.
    Inventors: Xiaoxia Sun, Chunmei Wang, Jun Sun, Haijun Yang, Zengyi Lu
  • Patent number: 9641673
    Abstract: Embodiments of the present invention disclose a method, a network element, and a system for assessing voice quality, which relates to the communications field and solves a problem that user perception cannot be reflected according to a voice quality assessment result. The method includes acquiring a voice code stream, and collecting statistics on a transmission parameter in each short-time assessment period; decoding the voice code stream, and collecting statistics on a source parameter according to the decoded voice code stream; and calculating a comprehensive voice quality assessment result according the transmission parameter and the source parameter. The present invention is used for voice quality assessment.
    Type: Grant
    Filed: February 24, 2015
    Date of Patent: May 2, 2017
    Assignee: Huawei Technologies Co., Ltd.
    Inventors: Chunmei Lu, Hongbo Yang, Yunjuan Xie, Haijiao Wang
  • Patent number: 9326196
    Abstract: Systems, methods, and computer-readable media for updating an out-of-date source neighbor list. In embodiments, the method includes maintaining a master neighbor list comprising a plurality of neighbor lists created by self-organizing network (SON) Automatic Neighbor Relation (ANR). Cell pairs in the master neighbor list with zero handover counts are identified. Each cell pair may comprise a source cell and a potential neighbor cell. A distance between each source cell and each corresponding potential neighbor cell having zero handover counts is determined. For each cell pair, a PCI (Physical Cell Identity) associated with a potential neighbor cell is identified. For each potential neighbor cell, an identity of a source neighbor cell in a source neighbor list corresponding to each source cell is determined, wherein the source neighbor cell having and the potential neighbor cell have a matching PCI. The distance between the source cell and the source neighbor cell is determined.
    Type: Grant
    Filed: January 10, 2014
    Date of Patent: April 26, 2016
    Assignee: Sprint Communications Company L.P.
    Inventors: Krishna Sitaram, Daniel Alberto Vivanco, Chunmei Lu
  • Patent number: 9301218
    Abstract: A base station's neighbor list may become outdated as nearer base stations are deployed. Because mobile devices report non-unique identifiers of surrounding base stations, a serving base station may confuse a newer neighboring base station with an out-of-date neighboring base station having the same non-unique identifier. The base station may attempt to hand over the mobile device to the wrong base station based on its outdated neighbor list. The mobile device may notify the serving base station of the failure and the associated non-unique identifier. When again attempting to hand over a mobile device to the target base station having that non-unique identifier, the serving base station may, based on knowing the previous handover failed, request the mobile device to provide the unique identifier of the target base station. If the unique identifier does not match the information in the neighbor list, the base station can update the neighbor list.
    Type: Grant
    Filed: January 10, 2014
    Date of Patent: March 29, 2016
    Assignee: Sprint Communications Company L.P.
    Inventors: Krishna Sitaram, Daniel Alberto Vivanco, Chunmei Lu
  • Patent number: 9294970
    Abstract: A base station's neighbor list may become outdated as nearer base stations are deployed. Because mobile devices report non-unique identifiers of surrounding base stations, a serving base station may confuse a newer neighboring base station with an out-of-date neighboring base station having the same non-unique identifier. The base station may attempt to hand over the mobile device to the wrong base station based on its outdated neighbor list. A determination may be made that first and second base stations share an identical non-unique identifier. A determination may be made that the first and second base stations' neighbor lists include an identical unique identifier associated with a third base station. The earlier of the two base stations is determined, and the neighbor relationship between the earlier base station and the third base station is removed from their associated neighbor lists.
    Type: Grant
    Filed: January 10, 2014
    Date of Patent: March 22, 2016
    Assignee: Sprint Communications Company L.P.
    Inventors: Krishna Sitaram, Daniel Alberto Vivanco, Chunmei Lu
  • Publication number: 20150172455
    Abstract: Embodiments of the present invention disclose a method, a network element, and a system for assessing voice quality, which relates to the communications field and solves a problem that user perception cannot be reflected according to a voice quality assessment result. The method includes acquiring a voice code stream, and collecting statistics on a transmission parameter in each short-time assessment period; decoding the voice code stream, and collecting statistics on a source parameter according to the decoded voice code stream; and calculating a comprehensive voice quality assessment result according the transmission parameter and the source parameter. The present invention is used for voice quality assessment.
    Type: Application
    Filed: February 24, 2015
    Publication date: June 18, 2015
    Inventors: Chunmei Lu, Hongbo Yang, Yunjuan Xie, Haijiao Wang