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Method for maintaining a data transmission connection

  • US 7,502,362 B1
  • Filed: 10/27/2000
  • Issued: 03/10/2009
  • Est. Priority Date: 10/28/1999
  • Status: Active Grant
First Claim
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1. A method for maintaining a data transmission connection between a terminal and an application server connected to a telecommunication network, said method comprising:

  • establishing an application level data transmission connection between said terminal and said application server by using a packet data telecommunications service of the telecommunication network as a bearer service;

    establishing a circuit-switched telecommunications connection between said terminal and said telecommunication network;

    interrupting the packet data telecommunications service for the time of the circuit-switched telecommunications connection;

    setting up a message for maintaining the data transmission connection between said terminal and said application server in connection with establishing the circuit-switched telecommunications connection;

    wherein said message comprises a command to reset an application level time-out counter in the application server; and

    transmitting said message to the application server before starting to establish the circuit-switched telecommunications connection.

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