C.8 Definition of feature-capability indicator g.3gpp.atcf-path

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

Feature-capability indicator name: g.3gpp.atcf-path

Summary of the feature indicated by this feature-capability indicator:

This feature-capability indicator when used in a Feature-Caps header field as specified in IETF RFC 6809 [60] in SIP REGISTER request indicates capability of identifying the registration path and binding SRVCC related information to it.

Feature-capability indicator specification reference:

3GPP TS 24.237, http://www.3gpp.org/ftp/Specs/archive/24_series/24.237/

Values appropriate for use with this feature-capability indicator:

String with an equality relationship. When used in a Feature-Caps header field, the value is a SIP URI of ATCF, the ATCF URI for terminating requests, identifying the registration path following the syntax as described in table C.8-1 for g-3gpp-atcf-path.

Table C.8-1: ABNF syntax of values of the g.3gpp.atcf-path feature-capability indicator

g-3gpp-atcf-path = "<" SIP-URI ">"

The feature-capability indicator is intended primarily for use in the following applications, protocols, services, or negotiation mechanisms: This feature-capability indicator is used in access transfer control function of single radio voice call continuity to identify registration path so that SCC AS can provided the SRVCC related information related to the registration path.

Examples of typical use: Indicating capability of identifying a registration path and binding SRVCC related information to it.

Security Considerations: Security considerations for this feature-capability indicator are discussed in clause 9 of IETF RFC 6809 [60].