C.12 Definition of media feature tag g.3gpp.ti

24.2373GPPIP Multimedia (IM) Core Network (CN) subsystem IP Multimedia Subsystem (IMS) service continuityRelease 17Stage 3TS

Media feature-tag name: g.3gpp.ti

ASN.1 Identifier: 1.3.6.1.8.2.18

Summary of the media feature indicated by this tag:

This media feature tag when used in a Contact header field as specified in IETF RFC 3840 [53] in SIP INVITE request or SIP response to the SIP INVITE request indicates the capability of associating a CS call with dialog created by the SIP INVITE request.

Values appropriate for use with this feature-tag:

String with an equality relationship. The value is the transaction identifier specified in figure 11.9 and table 11.3 of 3GPP TS 24.007 [75] encoded by hexadecimal digits. Each octet of the figure 11.9 of 3GPP TS 24.007 [75] is encoded by two hexadecimal digit, first of which represents the bits 8 – 5 of the octet. The transaction identifier flag is set as sent by the MSC server in CS signalling of the associated CS call.

The feature-tag is intended primarily for use in the following applications, protocols, services, or negotiation mechanisms: This feature-tag is used to indicate capability of associating a CS call with dialog created by the SIP INVITE request.

Examples of typical use: Indicating capability of associating a CS call with dialog created by the SIP INVITE request.

Related standards or documents: 3GPP TS 24.237: "IP Multimedia Subsystem (IMS) Service Continuity; Stage 3"

Security Considerations: Security considerations for this media feature tag are discussed in subclause 12.1 of IETF RFC 3840 [53].