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TR 23.741 (SA2)
Study on enhancements to
Multimedia Broadcast/Multicast Service (MBMS) for LTE

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V13.0.0 (Wzip)    2015/09    27 p.

Rapporteur:  Mr. Wong, Curt
See also:  –

The objective of this Technical Report is to study and specify potential modifications to the MBMS/GCSE_LTE architectures and/or procedures as specified in TS 23.246 and TS 23.468 to enable the following improvements and enhancements:
  • to allow the establishment of MBMS bearers using target area information, as distinct from using an MBMS Service Area;
  • to MBMS congestion handling;
  • if seen to be needed, to possible MBMS roaming scenarios;
  • as required by the MCPTT application work.


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1   Scope   Word-p. 6
2   References
3   Definitions and abbreviations   Word-p. 7
4   Architectural Assumptions
5   Key Issues
6   Solutions   Word-p. 9
6.1   Solution 1: ECGI list is passed among GCS AS and MBMS nodes: BM-SC maps ECGI list to SAI list
6.2   Solution 2: ECGI list is passed between GCS AS and MBMS nodes: BM-SC, MBMS GW and MME pass an ECGI list downstream   Word-p. 12
6.3   Solution 3: Route MBMS Session Start using SAI derived from TAI; describe broadcast area with ECGIs   Word-p. 17
6.4   Solution 4: Use of MBSFN Area Ids and/or ECGI lists for requesting MBMS service   Word-p. 21
6.5   Solution 5: Congestion signalling - informative only, as an example   Word-p. 24
7   Overall Evaluation
8   Conclusions      Up
A   Change history   Word-p. 27

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