Method for reducing the risk of call connection failure and system to perform the method

A computer comprising a processor and an internal memory, and adapted to execute a program stored on the internal memory or on a computer-readable recording medium, the program comprising a method for reducing a risk of call connection failure, wherein the method comprises:

• replying to a call connection request from a calling terminal;
• receiving a first message;
• determining whether the first message includes predetermined data, the predetermined data comprising data to be sent to a call connection video server;
• and
• if the first message includes the predetermined data, setting an initial value using a second message from the calling terminal for a Numbered Simple Retransmission Protocol (NSRP) session with the calling terminal,
• wherein the predetermined data includes at least one of a video temporal spatial tradeoff command, miscellaneous video temporal spatial indication, and video fast update picture command.

A system to reduce a risk of call connection failure, comprising:

• a receiving unit to reply to a call connection request from a calling terminal and to receive a first message;
• a determination unit to determine whether predetermined data is included in the first message, the predetermined data comprising data to be sent to a call connection video server;
• and
• a setting unit to set an initial value using a second message from the calling terminal for a Numbered Simple Retransmission Protocol (NSRP) session with the calling terminal if the first message includes the predetermined data,
• wherein the predetermined data includes at least one of a video temporal spatial tradeoff command, miscellaneous video temporal spatial indication, and video fast update picture command.