The invention discloses a multi-service triggering method based on an extended
initial filter criteria in an IMS (
IP Multimedia Subsystem) network. The multi-service triggering method comprises three operations steps of (1) extending iFC (
initial Filter Criteria) by following an iFC UML (
Unified Modeling Language) model defined in 3GPP TS ( 3rd Generation Partnership Project Technical Specification) 29.228 standards, and defining the extended iFC as e-iFC, (2) managing a multi-service triggering identification with a
Route header in an SIP (
Session Initiation Protocol) message, orderly adding services needing to be triggered to the
Route header of the SIP message by an S-CSCF (Serving Call
Session Control Function) according to the priorities of SIP URLs (SIP Uniform Resource Locators) and then triggering an initial SIP message to the service having the highest priority, and (3) executing a multi-service triggering method e-MSTA (electronic-
Multicast Spanning Tree Algorithm) based on the e-iFC by virtue of the
Route header in the SIP message and based on the e-iFC. The multi-service triggering method is capable of effectively reducing the signaling traffic of the S-CSCF by optimizing the multi-service triggering flow of the existing 3GPP, and as a result, the
throughput capacity of the whole
system is increased, the multi-service triggering efficiency of an IMS (
IP Multimedia Subsystem) network, and in the meantime, session establishment time
delay is remarkably reduced and the
service quality of the IMS network is improved.