Patent ID: 9094411
Filing Date: 2015-07-28
Classification: H04L

Abstract:
1. A method to resume initial filter criteria (iFC) evaluation at a specific point in a Serving Call Session Control Function (S-CSCF), the method comprising the steps of: sending, at the S-CSCF to an application server, a Session Initiation Protocol (SIP) INVITE message that has an iFC index parameter in a route header of the SIP INVITE message, wherein the iFC index parameter is a number indicative of a specific position in the iFC evaluation; receiving, at the S-CSCF from the application server, a final response to the SIP INVITE message to end the iFC evaluation; receiving, at the S-CSCF after the final response, a new SIP INVITE message from the application server that contains an iFC resume parameter; determining, at the S-CSCF, that the new SIP INVITE message contains the iFC resume parameter; and resuming, at the S-CSCF, service processing at the specific position where the iFC evaluation ended, the specific position being indicated by the iFC resume parameter set to a value of the iFC index parameter.