Vorlage 3a

Technical requirements for the handover interfaces for the execution of telecommunications surveillance

4.2.3 Ad hoc HI-1 XML over HTTP administrative interface for ordering the real-time interceptions

4.2.3.1 Ad hoc HI-1 interface solution overview

The solution detailed in the section below proposes a somewhat simplified process and interface (HI-1) to order real-time interceptions in comparison to the comprehensive

implementation of the HI-1 eWarrant specified in section 4.2.2. As this ad hoc interface does not use the LIST and GET and Notification messages the consequence is that this ad hoc interface solution provides a more limited control on the ordering process.

This ad hoc interface uses most of the buidling blocks of the specification ETSI TS 103 120 V1.2.1 such as the LITask objects and the XML messages and the transport network.

However, the ad hoc interface requires the CSP to send an UPDATERequest toward the PTSS and the PTSS to send an UPDATEResponse toward the CSP with the following adaptations:

a) In the UPDATERequest the CSP will have to send a “DesiredStatus” instead of a "Status" towards the PTSS as specified in ETSI TS 103 120 V1.2.1 UPDATERequest message specification.

b) In the UPDATEResponse the PTSS shall omit the “LastChange” and "Generation" parameters.

4.2.3.2 Ad hoc HI-1 interface transport security

Provisions of the section 4.2.2.1 regarding transport and security remain valid for the

exchange oon ad hoc interface (XML messages via HTTPS including the elements referring to ETSI TS 103 120 V1.2.1).

4.2.3.3 Ad hoc HI-1 interface action messages used for a real-time interception order process

Action messages defined for the ad hoc interface that are used by the LITask management processes.

Action Requests Action Responses

Create CreateResponse

Update UpdateResponse

Error Information

Table 4-15: Action messages used by the ad hoc HI-1 interface via HTTP

4.2.3.4 Ad hoc HI-1 interface: Message flow for a real-time interception activation order

This section provides an overview of the message flow for an ad hoc real-time interception activation order.