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TR 25.905 (RAN6)
Feasibility study on improvement of the Multimedia Broadcast/Multicast Service (MBMS) in UTRAN

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(P) V7.2.0    2008/01    50 p.

Rapporteur:  Mr. Lee, Youngdae
See also:  –

This TR summarizes the work done under the study item "Improvement of the Multimedia Broadcast Multicast Service (MBMS) in UTRAN" by listing technical concepts addressing the objectives of the study item, analysing these technical concepts and recommending a way forward of the study item.

The objective of this study item is to analyse the feasibility and merits of potential improvement of MBMS in the Release 7 RAN specifications. It is the intention that the introduction of MBMS based on Release 6 due to these enhancements should not be delayed, and that these improvements should be able to be integrated on top of the Rel6 functionalities smoothly. The study should progress based on the current framework of Release 6 MBMS in backward compatible ways.

The potential improvements of MBMS described in this technical report are as follows:
  • Support for a dual receiver UE receiving simultaneously MBMS and dedicated services on separate carriers.
  • SFN operation of MBMS in the physical layer.


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1   Scope   PDF-p. 7
2   References
3   Definitions, symbols and abbreviations
4   Introduction   PDF-p. 8
5   Outline of proposals
5.1   Dual receiver UEs
5.2   SFN operation for MBMS   PDF-p. 16      Up
5.3   Chip Combining (1.28 Mcps TDD)
6   Analysis of the proposals   PDF-p. 18
6.1   Dual receiver UEs
6.1.1   FDD + WCDMA DL
6.1.2   FDD + TD-CDMA DL
6.1.2a   LCR TDD + LCR TDD DL
6.1.3   Interference considerations for simultaneous operation of unicast and MBMS auxiliary carrier
6.1.4   RF Aspects of Re-configuration of Rx diversity terminal to support two independent frequency layers   PDF-p. 41
6.2   SFN operation for MBMS      Up
7   Conclusions and Recommendations   PDF-p. 46
A   Change history   PDF-p. 48

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