The P-CSCF Restoration Required IE indication bit is set to 1. For other IE support, this bit is set to 0. When it is set to 1, it indicates that the P-CSCF restoration is required for the user.

For more information, refer to the HSS and PCRF Based P-CSCF Restoration Support chapter in the P-GW Administration Guide.

The following message types include the RAN/NAS Cause IE on the Gx interface:

• Create Bearer Request

• Delete Bearer Request

• Update Bearer Request

For more information, refer to the Gx Interface Support chapter in the P-GW Administration Guide.

The following message types are supported by the Secondary RAT Usage Data Report IE:

• Create Session Request

• Modify Bearer Request

• Delete Session Request

• Delete Bearer Response

• Delete Bearer Command

For more information, refer to the 5G NSA for SAEGW chapter in the 5G Non-Standalone Solution Guide.

The Secondary RAT Usage Data Report IE supports the Change Notification Request and Response messages during inter RAT handover. I-CUPS supports this functionality in this release.

For more information, refer to the 5G NSA for SAEGW chapter in the 5G Non-Standalone Solution Guide.

The UP Function Selection IE supports Create Session Request in this release.

For more information, refer to the 5G NSA for SAEGW chapter in the 5G Non-Standalone Solution Guide.

The Create Session Request supports the Mapped Usage Type IE. This IE is encoded into the 5th and 6th octet binary integer as defined in subclause 5.8.1 of 3GPP TS 29.003 [32]. This IE complies with the SR and ICSR support. This functionality is currently limited to the S5 and S8 interfaces.