Patents by Inventor Douglas W. Chan

Douglas W. Chan 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: 5537547
    Abstract: In a telecommunications management network including a network element provisioned as a so-called Directory Services Network Element (DSNE) and at least one sub-network intended to include one or more network elements, the DSNE automatically distributes the identity information of all network elements in a sub-network to all the network elements in that sub-network. Specifically, the DSNE automatically distributes all the identity information for all network elements within a sub-network to a newly registered network element and also supplies the identity information for the newly registered network element to all the other network elements within the sub-network. Since, each sub-network can be defined as a set of network elements that require significant communications with each other, distribution of the identity information for all the network elements in the sub-network to all the network elements in that sub-network significantly reduces the number of queries made to the DSNE.
    Type: Grant
    Filed: December 14, 1992
    Date of Patent: July 16, 1996
    Assignee: AT&T Corp.
    Inventors: Douglas W. Chan, Christopher J. Hunt, C. Daniel Vanevic, Christopher S. Welles
  • Patent number: 5303235
    Abstract: In a telecommunications management network indications of newly reachable network elements and indications that existing network elements cease to be reachable are maintained automatically and the need for manually inputting such information is eliminated by employing a routing exchange protocol to dynamically maintain identity information of network elements reachable within the network, and by enhancing the routing exchange protocol interface to automatically supply an indication that a newly reachable network element has been detected or an indication that an existing network element has ceased to be reachable to an applications layer protocol.
    Type: Grant
    Filed: December 14, 1992
    Date of Patent: April 12, 1994
    Assignee: AT&T Bell Laboratories
    Inventors: Douglas W. Chan, Christopher J. Hunt, C. Daniel Vanevic, Christopher S. Welles