Content for TR 23.831 Word version: 10.0.0
1 Scope p. 7
This technical report intends to develop enhancements to Rel-9 IMS Service Continuity in TS 23.237, specifically in the functional area of Inter-UE Transfer. The main objective is to provide enhancements to mobility of media flows of a session between different UEs (Inter-UE Transfer) with respect to the following aspects:
- Extension of Inter-UE Transfer and Collaborative Session capabilities specified in Rel-09 to multiple UEs belonging to different IMS subscriptions under the same operator.
- Establishment of a Collaborative Session at session setup.
- Support for control of media components of a Collaborative Session by more than one UE simultaneously.
- Transfer of control of a Collaborative Session.
- Controller initiated media modification on a Controllee UE (e.g. video resolution).
- Discovery of ongoing IMS multimedia sessions on different UEs.
-
Inter-UE Transfer initiated by the target UE when:
- the target UE belongs to the Collaborative Session but it is not a Controller UE;
- the target UE does not belong to the Collaborative Session and wants to join;
- Inter-UE Transfer is performed without establishing a Collaborative Session.
- Replication of an ongoing multimedia session from one UE on another UE.
- Inter-UE Transfer between UEs connected to the IMS via an IP-CAN and ICS entities that provide interworking with UEs in the CS Domain.
- Execution of MMTEL services for Collaborative Sessions.
2 References p. 7
The following documents contain provisions which, through reference in this text, constitute provisions of the present document.
- References are either specific (identified by date of publication, edition number, version number, etc.) or non specific.
- For a specific reference, subsequent revisions do not apply.
- For a non-specific reference, the latest version applies. In the case of a reference to a 3GPP document (including a GSM document), a non-specific reference implicitly refers to the latest version of that document in the same Release as the present document.
[1]
TR 21.905: "Vocabulary for 3GPP Specifications".
[2]
TS 23.237: "IP Multimedia Subsystem (IMS) Service Continuity; Stage 2".
[3]
TS 23.292: "IP Multimedia Subsystem (IMS) centralized services; Stage 2".
[4]
TS 22.173: "IP Multimedia Core Network Subsystem (IMS) Multimedia Telephony Service and supplementary services; Stage 1".
[5]
TS 24.610: "Communication HOLD (HOLD) using IP Multimedia (IM) Core Network (CN) subsystem; Protocol specification".
[6]
TS 24.605: "Conference (CONF) using IP Multimedia (IM) Core Network (CN) subsystem; Protocol specification".
[7]
TS 24.629: "Explicit Communication Transfer (ECT) using IP Multimedia (IM) Core Network (CN) subsystem; Protocol specification".
[8]
TS 24.647: "Advice Of Charge (AOC) using IP Multimedia (IM)Core Network (CN) subsystem; Protocol Specification".
3 Definitions and abbreviations p. 8
3.1 Definitions p. 8
For the purposes of the present document, the terms and definitions given in TR 21.905 and the following apply. A term defined in the present document takes precedence over the definition of the same term, if any, in TR 21.905.
Collaborative Session Control:
The control operations on the Collaborative Session which can only be performed by the Controller UE, e.g. ability to release the Collaborative Session, to invoke supplementary services, and to authorize requests for IUT Media Control Related Procedures from other UEs.
Controllee UE:
A UE that supports media flows for a Collaborative Session and may request IUT Media Control Related Procedures but is subordinate to the Controller UE for authorization of these procedures.
Controller UE:
The UE that controls a Collaborative Session and whose service profile determines the services on the remote leg. The Controller UE may also support media flows for a Collaborative Session and may request IUT Media Control Related Procedures.
Hosting SCC AS:
The SCC AS that manages the dialog with the remote party for a Collaborative Session.
IUT Media Control Related Procedure:
The control operations on the media flows of the Collaborative Session which involve multiple UEs or need Controller UE's authorization within the Collaborative Session, e.g. ability to transfer/add/replicate media flows, to remove/modify media flows on a different UE.
Playback Control:
The ability to control the playback (e.g., play/pause/rewind/fast forward/stop) of media flows of a Collaborative Session.
3.2 Abbreviations p. 8
