Patents by Inventor David Kuan

David Kuan 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: 8301780
    Abstract: A client-based solution for seamless access to applications across networks is agnostic to the inter-network mix of application architectures with or without IMS. In one embodiment, the presence of an added layer of intelligence effectively traverses and is agnostic to the various standards layers.
    Type: Grant
    Filed: September 26, 2006
    Date of Patent: October 30, 2012
    Assignee: Nextel Communications, Inc.
    Inventors: David Kuan, Ramesh Kalathur, Moshe Stoler, Ojas T. Choksi, Trin D. Vu, Hung Bui
  • Patent number: 8301734
    Abstract: A client-based solution for seamless access to applications across networks is agnostic to the inter-network mix of application architectures with or without IMS. In one embodiment, an application client registers in either an integrated mode or a standalone mode based whether an application availability notification is received within a predetermined period of time.
    Type: Grant
    Filed: December 5, 2006
    Date of Patent: October 30, 2012
    Assignee: Nextel Communications, Inc.
    Inventors: David Kuan, Ramesh Kalathur, Moshe Stoler, Ojas T. Choksi, Trinh D. Vu, Hung Bui
  • Patent number: 8055262
    Abstract: Several embodiments of an IMS communications network are disclosed. In one embodiment, the network comprises a plurality of dispatch application servers (DAS), an S-CSCF, and an event notification server. The S-CSCF is adapted to receive an IMS registration request from a dispatch client, authenticate the registration request, send a registration confirmation to the dispatch client, and send a notification indicating the registration of the dispatch client to an event notification server. The event notification server is adapted to receive the notification from the S-CSCF, select a DAS, and send a notification to the selected DAS indicating an assignment to provide dispatch service to the dispatch client. In another embodiment, the registration notification to the event notification server is sent from the dispatch client, instead of the S-CSCF.
    Type: Grant
    Filed: July 5, 2006
    Date of Patent: November 8, 2011
    Assignee: Nextel Communications Inc.
    Inventors: Trinh D. Vu, Ojas Choksi, Ramesh Kalathur, Moshe Stoler, Hung Bui, David Kuan
  • Patent number: 8055201
    Abstract: A system and method for providing integrated voice quality measurements for wireless networks, based on actual calls made by end devices, are provided. The system includes a plurality of end devices, each of which includes an algorithm for determining voice quality data; an over-the-air server configured to enable voice quality reporting in the end devices; a messaging server configured to receive voice quality reports from the end devices; a voice quality server configured to receive the voice quality reports from the messaging server and consolidate the voice quality reports; and a call data record server configured to combine call records and the consolidated voice quality reports.
    Type: Grant
    Filed: July 21, 2006
    Date of Patent: November 8, 2011
    Assignee: Nextel Communications Inc.
    Inventor: David Kuan
  • Publication number: 20080077654
    Abstract: A client-based solution for seamless access to applications across networks is agnostic to the inter-network mix of application architectures with or without IMS. In one embodiment, the presence of an added layer of intelligence effectively traverses and is agnostic to the various standards layers.
    Type: Application
    Filed: September 26, 2006
    Publication date: March 27, 2008
    Applicant: NEXTEL COMMUNICATIONS, INC.
    Inventors: David Kuan, Ramesh Kalathur, Moshe Stoler, Ojas T. Choksi, Trin D. Vu, Hung Bui