Patents by Inventor Chung Shing Lam

Chung Shing Lam 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: 20250212076
    Abstract: A method of performing roaming and handover load balancing in a multicell wireless communication network that comprises one or more base stations, each base having a number of call slots to communicate with wireless terminals. The method includes receiving, at a terminal, a broadcast from a base, of the one or more bases, providing capacity information for the one or more bases. The capacity information comprises terminal localization status information and active call handover status information for the one or more bases. The method also includes storing the capacity information in a database at the terminal. The method further includes receiving a roaming or handover request based on signal strength and/or link quality directing the terminal to roam or handover a call to a target base; and overriding the roaming or handover request, to prevent roaming or handover to the target base, based on the stored capacity information.
    Type: Application
    Filed: December 22, 2023
    Publication date: June 26, 2025
    Inventors: Ralph Tischler, Chung Shing Lam
  • Publication number: 20250203014
    Abstract: A method for emulating a shared line system in a multicell wireless network. A primary base assigns, to a first call, a call index identifying the first call on a first shared line. The primary base distributes a call record of the first call, including the call index of the first call and a call status of the first call, to at least one secondary base. The method also includes broadcasting, to wireless terminals assigned to the first shared line, the call index of the first call and the call status of the first call. The primary base performs a call operation relating to the first call based on an operation request from one of the wireless terminals assigned to the first shared line. The operation request includes the call index of the first call. Each wireless terminal may display the call index and the call status.
    Type: Application
    Filed: December 13, 2023
    Publication date: June 19, 2025
    Inventors: Bennett Cheng, Gary Louie, Kar She Chan, Chung Shing Lam
  • Patent number: 12108309
    Abstract: A telecommunications system includes a base, a plurality of handsets, and a status database for storing status information. Each handset is localized to the base. The status information may be that of a first handset of the plurality of handsets. The base broadcasts to the plurality of handsets a status broadcast that includes the status information.
    Type: Grant
    Filed: December 8, 2021
    Date of Patent: October 1, 2024
    Assignee: VTECH TELECOMMUNICATIONS LIMITED
    Inventors: Supajet Guy Pothiboon, Bennett Cheng, Gary Louie, Ralph Tischler, Chung Shing Lam
  • Publication number: 20230179957
    Abstract: A telecommunications system includes a base, a plurality of handsets, and a status database for storing status information. Each handset is localized to the base. The status information may be that of a first handset of the plurality of handsets. The base broadcasts to the plurality of handsets a status broadcast that includes the status information.
    Type: Application
    Filed: December 8, 2021
    Publication date: June 8, 2023
    Inventors: Supajet Guy Pothiboon, Bennett Cheng, Gary Louie, Ralph Tischler, Chung Shing Lam