18.4 Study on Requirements of ims Multimedia Conferencing uid_320024

Resources: S1

References

Document	Title/Contents
WID(s)
SP-060479	SID on Study of Requirements of IP-Multimedia Subsystem (IMS) Convergent Multimedia Conferencing
Impacted Specifications
-	-
New Dedicated Specifications/Reports
TR 22.948	Study of requirements of IP-Multimedia Subsystem (IMS) convergent multimedia conferencing

Supporting Individual Members: China Mobile, Huawei, Comverse, ZTE, Radvision.

Convergent MultiMedia Conferencing (CMMC) is a service for two or more parties in different locations to communicate using a combination of audio, video, messaging and data. The data communication covers a variety of applications including whiteboard, document sharing, application sharing, desktop sharing, file delivery etc. CMMC is used more and more for on-line collaboration, meeting, training, distance learning, medical treatment etc.

CMMC covers a range of communication activities and technologies. Audio, video and data co-exist in a conversation of multiple parties, which is different from point-to-point multimedia conversation. CMMC provides a variety of data sharing not standardized yet within IMS. This work reviews requirements and studies how to develop CMMC over IMS.

TS 22.228 (Service requirements for IMS; Stage 1) identifies general requirements of IMS convergent conferencing whereas TS 24.147 (Conferencing using IMS; Stage 3) provides protocol details of conferencing within IMS. However, many aspects for the complete IMS conferencing service have not been specified, such as data sharing, media control, floor control, conference policy etc.

IETF SIPPING specifies high-level requirements for conferencing and a framework for conferencing with SIP. IETF XCON specifies a suite of protocols for conference, but the protocols are not intended for wireless mobile environments and are not specified with SIP.

OMA PoC supports video, message and other media in addition to voice, and defines the floor control mechanisms for different media; however applicability to conferencing needs to be checked.

In summary, to enable IMS CMMC and achieve interoperability, many aspects need to be standardized, especially data sharing in conferencing. Requirements for CMMC need to be reviewed, related IMS requirements to support CMMC need to be derived and possible routes for standardization need to be studied. The study

a) identifies IMS CMMC features and describes use cases illustrating the IMS CMMC service requirements;

b) derives the IMS requirements for CMMC services:

1) Conference framework;

2) Data sharing session establishment/termination/management in a conference;

3) Media Resource Function (MRF) function for CMMC;

4) Multicast capability for CMMC;

5) Media control for audio, video and data;

6) Floor control for audio, video and data;

7) Conference policy;

c) identifies possible routes to standardization:

1) Adopting existing and emerging standards e.g. OMA, IETF;

2) Modifying and enhancing existing and emerging standards;

3) Developing new standards.

TR 22.948 conclusion:

CMMC architecture and protocol should be consistent with IMS conferencing in TS 22.147 and TISPAN TS 183 005.

Avoid duplicate work with OMA.

Spin-off Rel-9 Feature UID_370026 Value-Added Services for Short Message Service (VAS4SMS).