Page 1354 - 5G Basics - Core Network Aspects

3 Signalling aspects

Table 8-2 – Protocols used for interfaces in DSN architecture when deploying MMTel service

Interfaces Interface description Protocols Relevant specifications

Is-a Interface between SCF-PE and Session Initiation Protocol (SIP) [ITU-T Q.1741.6]
AF-PE (Note)
Is-e Interface between SCF-PE and RELOAD [IETF RFC 6940]
end user for resource location
Interface between SCF-PE and SIP [ITU-T Q.1741.6]
end user for session control (Note)
Is-n Interface between SCF-PE and RELOAD [IETF RFC 6940]
NEF-PE
Is-s Interface between SCF-PE and RELOAD [IETF RFC 6940]
SCF-PE for resource location
Interface between SCF-PE and SIP [ITU-T Q.1741.6]
SCF-PE for session control (Note)
Ie-a Interface between AF-PE and XCAP [IETF RFC 4825]
end user
NOTE – [ITU-T Q.1741.6] endorsed the 3GPP specifications that specify the SIP protocol used in this interface.

9 Security considerations

The signalling architecture for DSN is required to support security mechanisms of session control as
supported by the protocols identified in clause 8. Other service specific security requirements are out of
scope of this Recommendation.

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