Patent ID: 8213425

Claim:
A method for matching initial request messages in a service triggering process in an internet protocol multimedia core network subsystem, comprising the following steps of: A. in a process of executing a service triggering, before a Serving Call Session Control Function (S-CSCF) module forwards an initial request message to an Application Server (AS), the S-CSCF module generating a trigger request identifier uniquely corresponding to said initial request message; B. said S-CSCF module inserting said trigger request identifier into said initial request message, and forwarding said initial request message to said AS; C. after processing, said AS copying the trigger request identifier in the received request message, and sending a second initial request message including the copied trigger request identifier back to said S-CSCF module; and D. said S-CSCF module determining that said second initial request message is a returned message of the initial request message sent to the AS by the S-CSCF module previously according to the trigger request identifier in the received second initial request message, determining the initial request message sent to the AS by the S-CSCF module corresponding to the trigger request identifier and an original dialog or original transaction corresponding to the initial request message, and then performing a subsequent service control process.