Imei based lawful interception for ip multimedia subsystem

Abstract

The present invention addresses method, apparatus and computer program product for enabling International Mobile Equipment Identifier based Lawful Interception for Internet Protocol IP Multimedia Subsystem, VoLTE and beyond systems. Thereby, an International Mobile Equipment Identifier allocated to a User Equipment and verified by an Evolved Packet Core is transmitted from a Mobility Management Entity to a Packet Gateway, the International Mobile Equipment Identifier is transmitted to a Proxy Call State Control Function via Policy and Charging Rules Function within the Policy and Charging Control procedures at Internet Protocol Multimedia Subsystem registration, and the International Mobile Equipment Identifier is transmitted to a Serving Call State Control Function at call set-up.

Dependencies are inferred from the claim text.