VoLTE / VoLTE / VoLTE Roaming Counterfeit/Falsification Preventing System Call Session Control Function Apparatus and Method for Preventing VoLTE Roaming Counterfeit/Falsification

摘要

Disclosed are a voice of long term evolution (VoLTE) roaming counterfeit/falsification preventing system, a call session control function apparatus, and a method for preventing VoLTE roaming counterfeit/falsification. The VoLTE roaming counterfeit/falsification preventing system according to the present invention includes: a call session control function (CSCF) apparatus for performing an internet protocol multimedia subsystem (IMS) registration procedure at the time of VoLTE-roaming: and a home subscribe server for storing position information acquired through an LTE connection of a user terminal. In this case, the CSCF apparatus verifies an outgoing call by comparing the position information acquired at the time of VoLTE-roaming of the user terminal with that stored in the home subscriber server.