INTERNET PROTOCAL MULTIMEDIA SUBSYSTEM AND METHOD FOR ESTABLISHING SESSION IN INTERNET PROTOCAL MULTIMEDIA SUBSYSTEM

摘要

The present invention, if the Internet protocol multimedia subsystem that provides a multimedia service that is not using the service-based local policy in order to form the session is a calling terminal to support session-based message, the calling terminal the first and the second groove the first and second call session control function block to the calling party according to each process to invite the intermediate node sends the invite message for the SIP session to the receiving terminal, the receiving terminal the invite message to the receiving of the network It characterized by comprising the step of sending and receiving messages for the message session relay protocol sessions (MSRP) with the terminal.