G.7 PTC

33.1283GPPProtocol and procedures for Lawful Interception (LI)Release 18SecurityStage 3TS

G.7.1 Scope of interception

The illustrations shown in this clause are for the service type PTC.

The interception of service type of PTC is done by the IRI-POI and CC-POI present in the PTC server and includes delivery of IRI or CC based on the delivery type indicated in the warrant.

The following target identifiers are applicable to the service type of PTC for provisioning the IRI-POI/CC-POI at the PTC Server:

– IMPU.

– IMPI.

– MCPTT ID.

– Instant ID URN.

– Chat group ID.

The following target identifiers are applicable to the service type of PTC for provisioning the IRI-POI at the HSS:

– IMPU.

– IMPI.

The target identity in the IMPU format may contain a SIP URI, TEL URI.

G.7.2 LIPF logic for service type of PTC

Figure G.7-1 illustrates the LIPF logic for the provisioning of IRI-POI/CC-POI in the PTC server.

Figure G.7-1: LIPF logic for provisioning the IRI-POI/CC-POI in PTC Server for the service type of PTC

When the Chat Group ID is used as the target ID, the PTC server happens to intercept when the indicated chat group ID is used for a PTC chat session.