A.1 Introduction

24.1743GPPRelease 17Stage 3Support of multi-device and multi-identity in the IP Multimedia Subsystem (IMS)TS

A.1.1 Call flow overview

This annex contains originating and terminating call flow examples for the following use cases:

– Originating flow when user A uses a non-native identity A1 registered by the UE.

– Originating flow when user A uses an identity C.

– Terminating flow when user B is reached by an identity D.

– Terminating flow when user B is reached by a native identity on multiple devices.

– MuD call flow: subscription to notifications of network call log changes.

– MuD call flow: synchronization of list of outgoing calls.

– MuD call flow: synchronization of missed call notifications.

A.1.2 Identity conventions used in this annex

A native identity is designated A-or B-in the flows for originating and terminating users, respectively. In the coding examples tel:+11111111 is used for originating native identities and tel:+11112222 is used for terminating native identities. For originating user A, a non-native identity registerd by the UE is designated A1 in the flows. In the coding examples, for simplicity reason, tel:+11111111 is also used in case of originating non-native registered identity.

Identity C and D are used in the flows for originating and terminating users, respectively. In the coding examples tel:+22221111 is used for originating non-registered identities and tel:+22222222 is used for terminating non-registered identities.