Tech-invite 3GPPspace IETFspace

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Content for TR 26.919 Word version: 17.0.0

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2 References p. 6

3 Definitions and Abbreviations p. 7

3.1 Definitions p. 7

3.2 Abbreviations p. 8

4 5G System Overview p. 8

4.1 Introduction p. 8

4.2 Stage-1 Requirements p. 8

4.3 Stage-2 System Architecture p. 9

5 Impacts of 5G Stage-1 Requirements on 3GPP Conversational Services p. 11

5.1 Technical Aspect 1: Efficient Speech User Plane p. 11

5.1.1 Description p. 11

5.1.2 Implications on MTSI p. 11

5.1.3 Implications on IMS-based Telepresence p. 11

5.1.4 Recommended Requirements p. 11

5.1.5 Gap Analysis p. 11

5.1.6 Potential Solutions p. 12

5.2 Technical Aspect 2: Efficient Video User Plane p. 12

5.2.1 Description p. 12

5.2.2 Implications on MTSI p. 12

5.2.3 Implications on IMS-based Telepresence p. 12

5.2.4 Recommended Requirements p. 12

5.2.5 Gap Analysis p. 12

5.2.6 Potential Solutions p. 12

5.3 Technical Aspect 3: Media Rate Adaptation p. 12

5.3.1 Description p. 12

5.3.2 Implications on MTSI and IMS-based Telepresence p. 13

5.3.3 Recommended Requirements p. 13

5.3.4 Gap Analysis p. 13

5.3.5 Potential Solutions p. 13

5.4 Technical Aspect 4: VR Services p. 14

5.4.1 Description p. 14

5.4.2 Implications on MTSI p. 14

5.4.3 Implications on IMS-based Telepresence p. 14

5.4.4 Recommended Requirements p. 14

5.4.5 Gap Analysis p. 14

5.4.6 Potential Solutions p. 14

5.5 Technical Aspect 5: 5G New Radio (NR) Access p. 16

5.5.1 Description p. 16

5.5.2 Implications on MTSI p. 16

5.5.3 Implications on IMS-based Telepresence p. 17

5.5.4 Recommended Requirements p. 17

5.5.5 Gap Analysis p. 17

5.5.5.1 Overview of Gaps in MTSI p. 17

5.5.5.2 Setting MBR>GBR in 5GS p. 17

5.5.5.3 UE Adaptation at Rates > GBR p. 18

5.5.6 Potential Solutions p. 19

5.5.6.1 SDP Parameter for End-to-end RAN-assisted codec adaptation support p. 19

5.5.6.2 SDP Parameter for link-by-link RAN-assisted codec adaptation support p. 20

5.5.6.3 Support of RAN-Assisted Codec Adaptation on NR p. 20

5.6 Technical Aspect 6: Profiles for 5G Deployments p. 20

5.6.1 Description p. 20

5.6.2 Implications on MTSI p. 21

5.6.3 Implications on IMS-based Telepresence p. 21

5.6.4 Recommended Requirements p. 21

5.6.5 Gap Analysis p. 21

5.6.6 Potential Solutions p. 21

5.7 Technical Aspect 7: Support for Real-Time Interaction p. 21

5.7.1 Description p. 21

5.7.2 Implications on MTSI p. 22

5.7.3 Implications on IMS-based Telepresence p. 22

5.7.4 Recommended Requirements p. 22

5.7.5 Gap Analysis p. 23

5.7.6 Potential Solutions p. 23

5.7.6.1 WebRTC Data Channel Framework p. 23

5.7.6.1.1 Flexibility in Usage p. 23

5.7.6.1.2 Flexibility in Development p. 23

5.7.6.1.3 Flexibility in Operations p. 24

5.7.6.1.4 Relation to Existing WebRTC in IMS Specifications p. 24

5.7.6.2 MSRP p. 24

6 Impacts of 5G Stage-2 System Architecture on 3GPP Conversational Services p. 25

6.1 Technical Aspect 1: Mapping of Conversational Services to 5G System p. 25

6.1.1 Description p. 25

6.1.2 Implications on MTSI and IMS-based Telepresence p. 25

7 Codecs for 5G Conversational Services p. 25

7.1 Introduction p. 25

8 QoS Handling for 5G Conversational Services p. 25

8.1 Introduction p. 25

9 Conclusions p. 26

$ Change history p. 27