7 Roles for General Capabilities

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

7.1 Introduction

This clause describes the general roles for each functional entity as specified.

7.2 UE roles

Configuration of user preference criteria for routing incoming session requests to a controller capable UE is specified in subclause 7.3.1 and for controller loss preference is specified in subclause 7.3.2.

7.3 AS roles

7.3.1 Configuration of user preference criteria for routing incoming session requests to a controller capable UE

Configuration of user preference criteria by the user should:

– take place over the Ut reference point using XCAP as enabling protocol; or

– use SIP based user configuration as described in 3GPP TS 24.238 [8];

NOTE: Other possibilities for user configuration, such as web-based provisioning or pre-provisioning by the operator are outside the scope of the present document, but are not precluded.

The structure of the XML document and the schema for the user preference criteria is defined in annex C.3

7.3.2 Configuration of controller loss preference

Configuration of controller loss preferences by the user should:

– take place over the Ut reference point using XCAP as enabling protocol; or

– use SIP based user configuration as described in 3GPP TS 24.238 [8];

NOTE: Other possibilities for user configuration, such as web-based provisioning or pre-provisioning by the operator are outside the scope of the present document, but are not precluded.

The structure of the XML document and the schema for configuring the list of preferred UEs that are used in the case of controller loss is defined in annex C.3.