Method for selecting transport protocol for transport of session initiation protocol messages in mobile phone, involves selecting transport protocol based on execution mode of voice over internet protocol application in mobile phone

摘要

The method involves selecting a transport protocol to be used according to an execution mode of a voice over Internet protocol (VoIP) application stored in a memory of a communication terminal (TRM) i.e. mobile phone, where the VoIP application is executed in a foreground mode or a background mode in the terminal. A change in the execution mode is detected, and a session initiation protocol (SIP) register message is transmitted, where the SIP register message includes a parameter selected according to the execution mode. Independent claims are also included for the following: (1) a communication terminal (2) a computer program for selecting a transport protocol among a UDP and a TCP, for the transport of SIP messages.