TR 23.700-23
Study on Application enabler for XR Services

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V19.2.0 (Wzip) 2025/03 85 p.

Rapporteur:: Ms. Zheng, Shaowen
China Mobile Com. Corporation

full Table of Contents for TR 23.700-23 Word version: 19.2.0

each clause number in 'red' refers to the equivalent title in the Partial Content

Introduction p. 7

Scope p. 8

References p. 8

Definitions of terms, symbols and abbreviations p. 9

3.1	Terms p. 9
3.2	Symbols p. 9
3.3	Abbreviations p. 9

Key issues p. 10

4.1	Key issue #1: KPI measurement and exposure p. 10
4.2	Key issue #2: E2E Multi-Modal Communication Flows p. 10
4.3	Key Issue #3: Coordination between direct UE connection and network based connection for AR/VR services p. 11
4.4	Key issue #4: Application enablement layer capabilities usage to supporting the XR services p. 11
4.5	Key issue #5: Support the tethered UE p. 11
4.6	Key issue #6: XR application server selection enhancement p. 12
4.7	Key issue #7: E2E KPI optimization for XR service p. 13
4.8	Key issue #8: PDU set handling for XR traffic p. 13

Application enablement architecture requirements p. 14

5.1

General requirements p. 14

5.2

Support for direct UE connection p. 14

5.2.1	Description p. 14
5.2.2	Requirements p. 15

5.3

Multi-modal flows alignment and monitoring requirements p. 15

5.3.1	Description p. 15
5.3.2	Requirements p. 15

5.4

Tethered device discovery and monitoring requirements p. 15

5.4.1	Description p. 15
5.4.2	Requirements p. 15

Application enablement architecture for XR services p. 15

6.1

Application enablement architecture p. 15

6.1.1	General p. 15
6.1.2	Option1: Application enablement architecture for XRAPP function p. 15
6.1.3	Option2: Application enablement architecture based on existing application enablement capabilities p. 16
6.1.4	Option3: CAPIF architecture to support the service discovery and invocation for XR application p. 20

Solutions p. 21

7.0

Mapping of solutions to key issues p. 21

7.1

Solution #1: SEALDD Policy Configuration for multi-modal flows p. 21

7.1.1	Architecture Impacts p. 21
7.1.2	Solution description p. 21
7.1.3	Information flows p. 22
7.1.4	Solution evaluation p. 22

7.2

Solution #2: Policy based Multi-modal SEALDD flow establishment p. 22

7.2.1	Architecture Impacts p. 22
7.2.2	Solution description p. 22
7.2.3	Solution evaluation p. 24

7.3

Solution #3: Support of Multi-Modal traffic indication in SEALDD layer p. 24

7.3.1	Architecture Impacts p. 24
7.3.2	Solution description p. 24
7.3.3	Solution evaluation p. 28

7.4

Solution #4: Support of QoS measurement for Multi-Modal traffic in SEALDD layer p. 29

7.4.1	Architecture Impacts p. 29
7.4.2	Solution description p. 29
7.4.3	Solution evaluation p. 38

7.5

Solution #5: Multi-flow synchronization for multi-modal XR application p. 38

7.5.1	Architecture Impacts p. 38
7.5.2	Solution description p. 38
7.5.3	Solution evaluation p. 40

7.6

Solution #6: Multi-modal flows alignment and monitoring p. 40

7.6.1	Architecture Impacts p. 40
7.6.2	Solution description p. 40
7.6.3	Solution evaluation p. 43

7.7

Solution #7: Support multi-modal service in SEALDD p. 44

7.7.1	Architecture Impacts p. 44
7.7.2	Solution description p. 44
7.7.3	Solution evaluation p. 51

7.8

Solution #8: EAS instantiation enhancement to satisfy E2E KPI requirements for XR application p. 51

7.8.1	Architecture Impacts p. 51
7.8.2	Solution description p. 51
7.8.3	Solution evaluation p. 53

7.9

Solution #9: Support performance analytics for tethered UEs p. 53

7.9.1	Architecture Impacts p. 53
7.9.2	Solution description p. 53
7.9.3	Solution evaluation p. 55

7.10

Solution #10: EDN selection based on predicted network connectivity p. 55

7.10.1	Architecture Impacts p. 55
7.10.2	Solution description p. 55
7.10.3	Solution evaluation p. 56

7.11

Solution #11: Support the tethered UE based on PINAPP p. 56

7.11.1	Architecture Impacts p. 56
7.11.2	Solution description p. 59
7.11.3	Solution evaluation p. 62

7.12

Solution #12: XR application server deployment enhancement p. 62

7.12.1	Architecture Impacts p. 62
7.12.2	Solution description p. 62
7.12.3	Solution evaluation p. 65

7.13

Solution #13: XR EAS selection based on N6 delay measurement p. 65

7.13.1	Architecture Impacts p. 65
7.13.2	Solution description p. 65
7.13.3	Solution evaluation p. 66

7.14

Solution #14: Support UE to UE communication in different modes via SEALDD p. 67

7.14.1	Architecture Impacts p. 67
7.14.2	Solution description p. 67
7.14.3	Information flows p. 69
7.14.4	Solution evaluation p. 69

7.15

Solution #15: Application enablement layer capabilities usage to support the user group level QoS guarantee p. 70

7.15.1	Architecture Impacts p. 70
7.15.2	Solution description p. 70
7.15.3	Solution evaluation p. 71

7.16

Solution #16: XR Application enablement client capability information procedure p. 71

7.16.1	Architecture Impacts p. 71
7.16.2	Solution description p. 72

7.17

Solution #17: Application Enablement Layer AIML Capabilities for Supporting XR Services p. 75

7.17.2	Procedure p. 75
7.17.3	Information flows p. 77
7.17.4	Solution evaluation p. 78

Business Relationships p. 78

8.1	General p. 78

Overall evaluation p. 78

9.1

General p. 78

9.2

Architecture evaluation p. 79

9.3

Solution evaluation p. 80

9.3.1	Key Issue #1 solutions evaluation p. 80
9.3.2	Key issue #2 solutions evaluation p. 80
9.3.3	Key issue #3 solutions evaluation p. 81
9.3.4	Key Issue #4 solutions evaluation p. 81
9.3.5	Key Issue #5 solutions evaluation p. 81
9.3.6	Key Issue #6 solutions evaluation p. 82
9.3.7	Key Issue #7 solutions evaluation p. 82
9.3.8	Key issue #8 solutions evaluation p. 82

Conclusions p. 83

10.1	General conclusions p. 83
10.2	Conclusions of key issue #1 p. 83
10.3	Conclusions of key issue #2 p. 83
10.4	Conclusions of key issue #3 p. 83
10.5	Conclusions of key issue #4 p. 83
10.6	Conclusions of key issue #5 p. 84
10.7	Conclusions of key issue #6 p. 84
10.8	Conclusions of key issue #7 p. 84
10.9	Conclusions of key issue #8 p. 84

Change history p. 85

TR 23.700-23 Study on Application enabler for XR Services

full Table of Contents for TR 23.700-23 Word version: 19.2.0

TR 23.700-23
Study on Application enabler for XR Services