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TR 26.957 (SA4)
Study on Server And Network-assisted Dynamic Adaptive Streaming over HTTP (DASH) (SAND) for 3GPP multimedia services

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V14.1.0 (PDF)  2017/03  54 p.

Rapporteur:  Dr. Oyman, Ozgur
See also:  –

The present document evaluates the MPEG DASH SAND (ISO/IEC 23009-5) specification to:
  • Ensure that 3GPP and MPEG remain aligned on their respective DASH specifications.
  • Identify enhancements offered by MPEG DASH SAND (ISO/IEC 23009-5) in the 3GPP environment, and recommend necessary modifications to the 3GPP specifications including DASH to enable these enhancements.
In particular, the following elements of functionality may be of particular 3GPP relevance and are studied:
  • Streaming enhancements via intelligent caching, processing and delivery optimizations on the server and/or network side, based on feedback from clients on anticipated DASH Segments, accepted alternative DASH Representations and Adaptation Sets, and requested bandwidth.
  • Improved adaptation on the client side, based on network/server-side information such as cached Segments, alternative Segment availability, and network throughput/QoS.


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1  ScopePDF-p. 6
2  References
3  AbbreviationsPDF-p. 7
4  Overview of MPEG Server And Network Assisted DASH (SAND) in ISO/IEC 23009-5
5  Architectural considerations for SANDPDF-p. 12
6  SAND use cases and relevance to 3GPP environmentPDF-p. 16
6.1  Use Case # 1: Content-Provider Optimized Zero-RatingUp
6.2  Use Case # 2: Consistent QoE/QoS for DASH Users
6.3  Use Case # 3 Proxy CachingPDF-p. 20Up
6.4  Use Case # 4 Network Assistance for DASHPDF-p. 23
7  MOOD for handling TLS protected unicast trafficPDF-p. 31Up
8  Streaming enhancements from QoE-Aware resource allocationPDF-p. 35
9  Cross-Origin Resource Sharing (CORS)PDF-p. 49
10  Connections to RAN Study on Context-Aware service deliveryPDF-p. 50
11  Conclusions and Recommendations
A  Change historyPDF-p. 52

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