P-CSCF SETUP SYSTEM FOR AN IMS(IP MULTIMEDIA SUBSYSTEM) SERVICE AND A P-CSCF SETUP METHOD FOR THE IMS SERVICE, PARTICULARLY FOR MINIMIZING UNNECESSARY CALL PROCESSING

摘要

PURPOSE: A P-CSCF setup system for an IMS service and a P-CSCF setup method for the IMS service are provided to enable a user to use an IMS service rapidly and smoothly.;CONSTITUTION: A DNS(Domain Name System) server(300) stores replay information related to a response message for a state information message in at least one P-CSCF. A terminal device(10) requests the domain address information of a P-CSCF having a certain domain name. The DNS server searches the domain address information of the P-CSCF corresponding to the domain name. The DNS server provides the domain address information of P-CSCF having the replay related to response message, based on the replay information.;COPYRIGHT KIPO 2010