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Method and system for call set-up between mobile communication terminals

  • US 7,809,839 B2
  • Filed: 01/25/2006
  • Issued: 10/05/2010
  • Est. Priority Date: 01/26/2005
  • Status: Expired due to Fees
First Claim
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1. A method for a call set-up between mobile communication terminals, comprising steps of:

  • receiving a signaling message for a call set-up with a call-incoming terminal from a call-originating terminal through short data burst (SDB);

    setting up a traffic channel of the call-originating terminal depending on a first origination signal sent by the call-originating terminal after transmitting the signaling message;

    receiving a response message of the call-incoming terminal to the signaling message; and

    setting up a traffic channel of the call-incoming terminal depending on a second origination signal sent by the call-incoming terminal after transmitting the response message,wherein the signaling message is a binary session initiation protocol (SIP) message comprising information about Method (MT), Application ID (AP), and Service Type (ST) for Push-To-Talk session,wherein the step of setting up the traffic channel of the call-originating terminal comprises;

    receiving the first origination signal from the call-originating terminal;

    converting the binary SIP message received from the call-originating terminal into a standard full SIP message by a proxy server managing the call-originating terminal; and

    routing the standard full SIP message to a group talk server (GTS), andwherein the step of receiving the response message of the call-incoming terminal further comprises converting the response message from a standard full SIP type into a binary SIP type if the call-originating terminal is in a dormant state.

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