Content for TS 26.247 Word version: 18.4.0
11 Live services
12 Ad insertion enablers
13 Server And Network-assisted DASH (SAND) support
14 Auxiliary metrics and reporting
15 Service Interactivity support via event signalling and DASH APIs
11 Live services |R13| p. 55
11.1 Overview of dynamic and live media presentations p. 55
11.2 Dynamic segment download p. 56
11.2.1 Background and assumptions p. 56
11.2.2 MPD information and timing model p. 56
11.2.2.1 MPD information p. 56
11.2.2.2 Segment information derivation p. 57
11.2.2.2.1 Introduction p. 57
11.2.2.2.2 Definitions p. 57
11.2.2.2.3 MPD information p. 58
11.2.2.2.4 Period information p. 58
11.2.2.2.5 Representation information p. 58
11.2.2.2.6 Media time information of segment p. 59
11.2.2.2.7 Segment List parameters p. 59
11.2.2.2.8 URL generation with segment template p. 60
11.2.3 Service offering requirements and guidelines p. 60
11.2.3.1 General service offering requirements p. 60
11.2.3.2 Dynamic service offering guidelines p. 61
11.2.3.3 Content offering with Periods p. 63
11.2.3.3.1 General p. 63
11.2.3.4 Joining recommendation p. 65
11.2.4 Client operation, recommendations and guidelines (informative) p. 65
11.2.4.1 Basic operation p. 65
11.2.4.2 Joining, initial buffering and playout recommendations p. 67
11.2.5 Considerations on live edge p. 68
11.3 Live services with MPD updates p. 68
11.3.1 Background and assumptions p. 68
11.3.2 Preliminaries p. 68
11.3.3 Service offering requirements and guidelines p. 69
11.3.3.1 General p. 69
11.3.3.2 Setting the minimum update period value p. 70
11.3.3.3 Permitted updates in an MPD p. 70
11.3.3.4 Last segment message p. 70
11.3.4 MPD-based live client operation based on MPD p. 71
11.4 Provisioning of live content in On-Demand mode p. 72
11.4.1 Scenario p. 72
11.4.2 Content Offering Requirements and Recommendations p. 72
11.4.3 Client behaviour p. 72
11.5 Availability time synchronization between client and server p. 73
11.5.1 Background p. 73
11.5.2 Service Provider requirements and guidelines p. 73
11.5.3 Client requirements and guidelines p. 73
11.6 Robust operation p. 74
12 Ad insertion enablers |R13| p. 75
12.1 Background p. 75
12.2 Enablers p. 75
13 Server And Network-assisted DASH (SAND) support |R15| p. 76
13.1 Introduction p. 76
13.2 SAND modes for 3GP-DASH p. 77
13.3 DANE discovery p. 77
13.4 SAND messages and protocols for 3GP-DASH p. 77
13.5 SAND message handling behaviours for DANEs and DASH clients p. 80
13.5.1 DASH client behaviour p. 80
13.5.2 DANE behaviour p. 80
13.6 Use of SAND for Network Assistance p. 80
13.6.1 General description p. 80
13.6.2 Common functions p. 81
13.6.2.1 Introduction p. 81
13.6.2.2 DANE discovery p. 81
13.6.2.3 Network Assistance session initiation p. 81
13.6.2.4 Network Assistance session termination p. 82
13.6.3 Rate recommendation function p. 82
13.6.4 Temporary delivery boost function p. 82
13.6.5 SAND messages usage and extensions p. 82
13.6.5.1 Introduction p. 82
13.6.5.2 Use of existing SAND messages p. 83
13.6.5.2.1 Shared resource allocation p. 83
13.6.5.2.2 Buffer level p. 83
13.6.5.2.3 Shared resource assignment p. 83
13.6.5.3 SAND message extensions p. 83
13.6.6 Network Assistance transactions p. 87
13.6.6.1 General p. 87
13.6.6.2 Network Assistance request p. 87
13.6.7 Example workflow for Network Assistance p. 90
13.7 Use of SAND for proxy caching p. 91
13.7.1 Introduction p. 91
13.7.2 Status messages for proxy caching p. 91
13.7.3 PER messages for proxy caching p. 92
13.7.4 Example workflow on SAND use for proxy caching p. 93
13.8 Use of SAND for consistent QoE/QoS p. 94
13.9 SAND extension messages XML schema p. 96
13.10 SAND for multi-network access mode p. 97
13.10.1 Introduction p. 97
13.10.2 DANE functionalities for SAND4M p. 98
13.10.3 DASH client functionalities for SAND4M p. 98
13.10.4 Message Channel p. 98
13.10.4.1 General p. 98
13.10.4.2 Assistance p. 99
13.10.4.3 Enforcement p. 99
13.10.4.4 Error case p. 99
14 Auxiliary metrics and reporting |R16| p. 99
14.1 General p. 99
14.2 Interactivity Usage metrics and reporting p. 99
14.2.1 Introduction p. 99
14.2.2 Interactivity Usage metric definitions p. 100
14.2.2.1 Introduction p. 100
14.2.2.2 Interactivity summary p. 100
14.2.2.3 Interactivity event list p. 101
14.2.3 Interactivity usage reporting scheme p. 101
14.2.4 Interactivity metrics p. 103
14.2.5 Interactivity Usage reporting protocol p. 103
15 Service Interactivity support via event signalling and DASH APIs |R16| p. 105
