B.3 Definition of media feature tag g.3gpp.iut-focus

24.3373GPPIP Multimedia (IM) Core Network (CN) subsystem IP Multimedia Subsystem (IMS) inter-UE transferRelease 17Stage 3TS

Media feature-tag name: g.3gpp.iut-focus

ASN.1 Identifier: 1.3.6.1.8.2.10

Summary of the media feature indicated by this tag:

This media feature-tag when used in a Contact header field or a Accept-Contact header field of a SIP request or a SIP response indicates that the function sending the SIP message supports anchoring a IUT session and/or the SIP message is an inter-UE transfer operation.

Values appropriate for use with this feature-tag: Boolean

The feature-tag is intended primarily for use in the following applications, protocols, services, or negotiation mechanisms: This feature-tag is most useful in a communications application, for indicating that the function sending the SIP message supports anchoring a IUT session and/or the SIP message request is an inter-UE transfer operation.

Examples of typical use: Indicating that a SCC AS has anchored the related IUT session and/or indicating that to the IMS core that the SIP message is an inter-UE transfer operation.

Related standards or documents: 3GPP TS 24.337: "IP Multimedia Subsystem (IMS) inter-UE transfer; Stage 3"

Security Considerations: Security considerations for this media feature-tag are discussed in subclause 14.1 of IETF RFC 3840 [34].