The ProSe UE-to-NW Relay uses one or more PDN connections for any activity/communication which is not related to relaying. In such case all the requirements specified for EPS interception in clause 12
apply. In addition, IRIs related specified in clause 12
are also applicable to the PDN connection used for relay.
This clause specifies additional functional requirements which are applicable to the PDN connection(s) established by the ProSe UE-to-NW Relay.
PDN connection(s) used for relaying only carry communications for the ProSe remote UEs. So, unless any of them is also a target for interception (for which clause 17.3.2
apply), no content of communication shall be intercepted from such PDN connection(s), unless required by national regulation, in which case all requirements specified in clause 12
apply also to these PDN connection(s).
In case ProSe remote UEs are connected to or disconnected from the target ProSe UE-to-NW Relay, the ICEs (MME, S-GW, PDN-GW) shall provide a ProSe Remote UE Report event, including the identities and IP info of ProSe remote UE(s) being connected/ disconnected.
In case interception is activated for a ProSe UE-to-NW Relay with already connected ProSe remote UE(s), the ICEs shall provide a Start of interception for ProSeUE-to-NW Relay, including the identities and IP info of ProSe remote UEs already connected to the relay. The same event shall also be sent by the new S-GW in case, due to ProSe UE-to-NW Relay mobility, there is a change of S-GW.
In case a Tracking Area/EPS Location Update event is provided for a target ProSe UE-to-NW Relay, it shall carry also information related to the connected ProSe remote UE(s).
The following information needs to be transferred from the EPS nodes (MME, S-GW, PDN-GW) to the DF2 in order to allow a DF2 to perform its functionality:
target identity (IMSI, MSISDN, IMEI);
events and associated parameters as defined in clause 126.96.36.199.