Patent ID: 9026645
Filing Date: 2015-05-05
Classification: H04L,H04W

Abstract:
1. A method of providing lawful interception in an IP Multimedia Subsystem network, the method comprising: at a first node in an IP Multimedia Subsystem network, receiving from a Lawful Intercept mediation system node, a message instructing the first node to perform lawful interception on a target; sending a subscribe request message from the first node towards a second node located in an IMS core network, the subscribe request message including at least an identity of a service type to be monitored; receiving at the first node a notify message including session information from the second node, the session information including information from which intercept related information can be derived; and sending from the first node towards the Lawful Intercept mediation system node a message, the message including the intercept related information, wherein the first node and the second node are geographically located in different countries.