Patents by Inventor Dragan Andjelic

Dragan Andjelic 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).

  • Method and end station with improved user reponse time in a mobile network
    Patent number: 5912878
    Abstract: A method and apparatus of improving user response time during cellular hand-offs and radio frequency changes in a Transmission Control Protocol/Internet Protocol (TCP/IP) mobile environment. In the mobile environment there is at least a mobile end station (20), a mobile data base station (22), a mobile data intermediate system (MDIS) (30) and a fixed end station (40). The MDIS (30) keeps track of the mobile end station (20) as it roams through the mobile environment. As a result, the MDIS (30) can distinguish between delays due to network congestion and delays due to cellular hand-offs. Further, the mobile data base station (22) informs the MDIS (30) of any changes in the radio frequency signal, thus allowing the MDIS (30) to also recognize delays due to changes in the radio frequency signal. With the knowledge of being able to identify the cause of the delays, the MDIS (30) is able to initiate or suppress a congestion control and recovery process.
    Type: Grant
    Filed: February 27, 1997
    Date of Patent: June 15, 1999
    Assignee: Motorola, Inc.
    Inventors: Sung-Woo Park, Dragan Andjelic, Viji Maini