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1. (WO2017032425) METHODS AND DEVICES FOR DETECTING AND CORRELATING DATA PACKET FLOWS IN A LAWFUL INTERCEPTION SYSTEM

Pub. No.:    WO/2017/032425    International Application No.:    PCT/EP2015/069689
Publication Date: Fri Mar 03 00:59:59 CET 2017 International Filing Date: Fri Aug 28 01:59:59 CEST 2015
IPC: H04L 29/06
Applicants: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)
Inventors: SENATORE, Andrea
TORO, Francesco
VILLANI, Elvira
Title: METHODS AND DEVICES FOR DETECTING AND CORRELATING DATA PACKET FLOWS IN A LAWFUL INTERCEPTION SYSTEM
Abstract:
The following disclosure relates a method and mediation device (100) in a Lawful Interception (LI) system for detecting and correlating copies of SIP and RTP flows, from different domains EPS or IMS, said method comprising to determine a unique IMS Communication Identity Number, IMS CIN, and a corresponding correlation set of identifiers, storing each unique IMS CIN together with its correlation set for an intercepted communication session, correlating a SIP or RTP flow received from one domain to the same SIP or RTP flows of the same communication session received from the other domain by comparing the flow identity information of the received flow to the stored correlation sets for identifying a matching correlation set and its unique IMS CIN and sending to a LEA requesting for LI of the target said received SIP or RTP flow comprising said identified unique IMS CIN for a matching correlation set.