Content for TR 26.802 Word version: 17.0.0
4 5G Media Streaming General Service Architecture and Principles
5 Key Issues
6 Potential Standardization Areas
7 Potential Solutions
8 Conclusions and Next Steps
$ Change history
4 5G Media Streaming General Service Architecture and Principles p. 10
4.1 Introduction p. 10
4.2 Related 5G multicast and broadcast work in 3GPP p. 11
4.2.1 General p. 11
4.2.2 Existing 3GPP specifications on MBMS p. 11
4.2.2.1 Introduction p. 11
4.2.2.2 MBMS Delivery Methods p. 11
4.2.2.3 MBMS User Service p. 12
4.2.2.4 xMB reference point between content provider and BM-SC p. 12
4.2.2.5 MB2 reference point p. 15
4.2.2.6 MBMS reference client architecture p. 17
4.2.2.7 MBMS Application Programming Interface and URL p. 17
4.2.3 SA2 5MBS study item on architectural enhancements for 5G multicast-broadcast p. 18
4.3 Related multicast and broadcast streaming standardization efforts outside 3GPP p. 22
4.3.2 DVB-MABR Phase 1 p. 22
4.4 Common architectural requirements and principles p. 25
4.4.1 General p. 25
4.4.2 5G Media Streaming (5GMS) general architecture p. 25
4.4.3 5G Multicast-Broadcast Services (5MBS) system architecture p. 26
4.4.4 Baseline Network Reference Architectures p. 26
4.4.4.1 General p. 26
4.4.4.2 5GMSA functions in the Trusted DN p. 27
4.4.4.3 5GMSA functions in an External DN p. 28
4.4.5 Client Architectures p. 28
5 Key Issues p. 34
5.1 General p. 34
5.2 Key Issue#1: Support of multicast ABR in 5G Media Streaming Architecture p. 34
5.2.1 Description p. 34
5.2.2 Scenario #1: MABR operation of 5MBS-enhanced 5GMS System p. 35
5.2.3 Scenario #2: External DVB-MABR System interworking with 5MBS-enhanced 5GMS System p. 35
5.2.4 Initial assessment p. 36
5.2.5 Scope of study p. 36
5.2.6 Identified gaps p. 37
5.2.6.1 Scenario #1: MABR operation of 5MBS-enhanced 5GMS System p. 37
5.2.6.2 Scenario #2: External DVB-MABR System interworking with 5MBS-enhanced 5GMS System p. 37
5.2.7 Conclusions and next steps p. 38
5.3 Key Issue 2: Nmb2 Design Considerations p. 38
5.3.1 Description p. 38
5.3.1.1 General p. 38
5.3.1.2 Model of a BM-SC User-Plane Function for MBMS Download Delivery p. 39
5.3.1.3 Handling of In-band ancillary Information for MBMS Download Delivery p. 40
5.3.1.4 Multiplexing of In-band ancillary information p. 41
5.3.1.5 Review of existing xMB properties for MBMS Download MBSTF configuration p. 41
5.3.1.6 Model of a BM-SC User-Plane Function for Group Communication Delivery p. 43
5.3.2 Identified gaps p. 44
5.3.3 Conclusions p. 45
5.4 Key Issue #3: Collaboration and deployment scenarios p. 45
5.4.1 Description p. 45
5.4.2 Collaboration A p. 45
5.4.3 Collaboration B p. 47
5.4.4 Collaboration C p. 49
5.4.5 Collaboration D p. 49
5.4.6 Conclusion p. 50
5.5 Key Issue #4: Reuse of MBMS service layer p. 50
5.5.1 Description p. 50
5.5.2 Conclusions p. 50
5.6 Key Issue #5: Client Architecture Options p. 51
5.7 Key Issue #6: Hybrid Services p. 52
5.7.1 Description p. 52
5.7.1.1 Definition p. 52
5.7.1.2 Use Case 1: External Hybrid Service p. 53
5.7.1.3 Use Case 2: 5GMS Hybrid Service p. 54
5.7.2 Identified Issues p. 55
5.7.2.1 General p. 55
5.7.2.2 Use Case 1: External Hybrid Service p. 55
5.7.2.3 Use Case 2: 5GMS Hybrid Service p. 55
5.7.3 Conclusions and Next Steps p. 56
5.8 Key Issue #7: 5GMS via eMBMS p. 57
5.8.1 Description p. 57
5.8.2 Identified Issues p. 57
5.8.2.1 Introduction p. 57
5.8.2.2 Option A: 5GMS uses MBMS User Service p. 58
5.8.2.2a Option B: 5MBS uses MBMS Transport-only Mode p. 59
5.8.2.3 Option C: 5GC integration of MBMS p. 59
5.8.2.4 Comparison of options p. 60
5.8.3 Conclusions p. 60
5.8.4 Recommended Next Steps p. 60
6 Potential Standardization Areas p. 61
6.1 General p. 61
6.2 Potential Standardization Areas p. 61
6.2.1 Introduction p. 61
6.2.2 5MBS User Service Architecture p. 61
6.2.3 5GMS Hybrid Services p. 62
7 Potential Solutions p. 64
7.1 General p. 64
7.2 Support of multicast ABR in 5G Media Streaming Architecture p. 64
7.2.1 Mapping of DVB-MABR and CableLabs MABR reference architectures to 5MBS reference architecture for Scenario #1 p. 64
7.2.1.1 Introduction p. 64
7.2.1.2 Mapping of logical functions p. 65
7.2.1.3 Mapping of logical reference points p. 66
7.2.1.4 Mapping to Collaboration B0 p. 68
7.2.2 Interworking of DVB-MABR reference architecture with 5MBS reference architecture for Scenario #2 p. 70
7.3 Multicast-Broadcast User Service p. 76
8 Conclusions and Next Steps p. 79
$ Change history p. 82
