C.0 Introduction

33.1083G Security3GPPHandover interface for Lawful Interception (LI)Release 17TS

There are three possible methods for delivery of content of communication to the LEMF standardized in this document:

a) UMTS/EPS LI Correlation Header (ULIC) and UDP/TCP

b) FTP

c) ETSI TS 102 232-1 [104] and ETSI TS 102 232-7 [105]

The present document recommends that option c) is used.

Two versions of ULIC are defined for UMTS PS interception: version 0 and version 1.

ULICv1 shall be supported by the network and, optionally, ULICv0 may be supported by the network. When both are supported, ULICv1 is the default value.

ULIC version 0 is not specified for EPS.