1、 ETSI TR 125 905 V7.2.0 (2008-01)Technical Report Universal Mobile Telecommunications System (UMTS);Feasibility study on improvement ofthe Multimedia Broadcast / Multicast Service (MBMS)in UTRAN (3GPP TR 25.905 version 7.2.0 Release 7)ETSI ETSI TR 125 905 V7.2.0 (2008-01) 1 3GPP TR 25.905 version 7.
2、2.0 Release 7 Reference RTR/TSGR-0225905v720 Keywords UMTS ETSI 650 Route des Lucioles F-06921 Sophia Antipolis Cedex - FRANCE Tel.: +33 4 92 94 42 00 Fax: +33 4 93 65 47 16 Siret N 348 623 562 00017 - NAF 742 C Association but non lucratif enregistre la Sous-Prfecture de Grasse (06) N 7803/88 Impor
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9、ntial, IPRs notified to ETSI in respect of ETSI standards“, which is available from the ETSI Secretariat. Latest updates are available on the ETSI Web server (http:/webapp.etsi.org/IPR/home.asp). Pursuant to the ETSI IPR Policy, no investigation, including IPR searches, has been carried out by ETSI.
10、 No guarantee can be given as to the existence of other IPRs not referenced in ETSI SR 000 314 (or the updates on the ETSI Web server) which are, or may be, or may become, essential to the present document. Foreword This Technical Report (TR) has been produced by ETSI 3rd Generation Partnership Proj
11、ect (3GPP). The present document may refer to technical specifications or reports using their 3GPP identities, UMTS identities or GSM identities. These should be interpreted as being references to the corresponding ETSI deliverables. The cross reference between GSM, UMTS, 3GPP and ETSI identities ca
12、n be found under http:/webapp.etsi.org/key/queryform.asp. ETSI ETSI TR 125 905 V7.2.0 (2008-01) 3 3GPP TR 25.905 version 7.2.0 Release 7 Contents Intellectual Property Rights2 Foreword.2 Foreword.6 1 Scope 7 2 References 7 3 Definitions, symbols and abbreviations .7 4 Introduction 8 5 Outline of pro
13、posals .8 5.1 Dual receiver UEs 8 5.1.1 FDD + WCDMA DL 8 5.1.1.1 UE capabilities 8 5.1.1.2 Scenario 1: MBMS multicarrier Rel-6 network:.9 5.1.1.3 Scenario 2: MBMS multicarrier Rel-6 network + optimisations for Rel-7 dual receiver UEs9 5.1.1.4 Scenario 3: Rel-6 network (single carrier or multicarrier
14、) + separate independent MBMS downlink only frequency for Rel-7 dual receiver UEs (FDD) 9 5.1.1.5 Architecture.10 5.1.2 FDD + TD-CDMA DL .11 5.1.2.1 UE capability requirements for support of MBMS .11 5.1.2.2 Backwards compatibility.12 5.1.2.3 Simultaneous TDD and FDD operation 12 5.1.2.3.1 Dual rece
15、iver requirements12 5.1.2.3.2 FDD transmit and TDD receive operation.12 5.1.2.4 Scenarios .13 5.1.2.4.1 Scenario 1: Non-integrated RAN.13 5.1.2.4.2 Scenario 2: Integrated RAN 13 5.1.3 LCR TDD + LCR TDD DL13 5.1.3.1 UE capability requirements.14 5.1.3.2 Scenarios .14 5.1.3.2.1 Scenario 1: TDD + TDD D
16、L .14 5.1.3.2.2 Scenario 2: TDD + Multicarrier TDD DL.14 5.1.3.2.3 Scenario 3: TDD + (Multicarrier) TDD DL 14 5.1.3.3 System architecture .15 5.1.3.4 Backwards compatibility.15 5.1.3.5 Dual receiver requirements .15 5.2 SFN operation for MBMS16 5.2.1 Time multiplexing of MBMS SFN with unicast carrie
17、r .16 5.2.2 SFN MBMS for auxiliary carrier16 5.2.2.1 Single/Dual Receiver Aspects.17 5.2.3 SFN operation with transmission delay offset 17 5.3 Chip Combining (1.28 Mcps TDD)17 6 Analysis of the proposals .18 6.1 Dual receiver UEs 18 6.1.1 FDD + WCDMA DL 18 6.1.1.1 Scenario 1: MBMS multicarrier Rel-6
18、 network:.18 6.1.1.1.1 Impact18 6.1.1.1.2 Analysis of the dual receiver UE behaviour 18 6.1.1.1.3 Backwards compatibility .18 6.1.1.2 Scenario 2: MBMS multicarrier Rel-6 network + optimisations for Rel-7 dual receiver UEs19 6.1.1.2.1 Impact19 6.1.1.2.2 Analysis of the dual receiver UE behaviour 19 6
19、.1.1.2.3 Backwards compatibility .19 ETSI ETSI TR 125 905 V7.2.0 (2008-01) 4 3GPP TR 25.905 version 7.2.0 Release 7 6.1.1.3 Scenario 3: Rel-6 network (single carrier or multicarrier) + separate independent MBMS downlink only frequency for Rel-7 dual receiver UEs (FDD) 19 6.1.1.3.1 Impact19 6.1.1.3.2
20、 Analysis of the dual receiver UE behaviour 20 6.1.1.3.3 Backwards compatibility .20 6.1.2 FDD + TD-CDMA DL .20 6.1.2.1 Scenario 1: Non-integrated RAN 20 6.1.2.1.1 Architecture/network implication21 6.1.2.1.2 Functions and procedures 22 6.1.2.1.3 Support of service continuity.24 6.1.2.1.3.1 Mobility
21、 in intra-TDD cells .24 6.1.2.1.3.2 Support of service continuity .24 6.1.2.1.3.3 Service continuity in pre-Rel.6 FDD UTRAN.25 6.1.2.1.3.3 Service continuity in Rel.6 FDD UTRAN .25 6.1.2.1.4 Connection state of the UE26 6.1.2.1.5 Specification Impacts 26 6.1.2.1.6 Benefits and drawbacks.26 6.1.2.2 S
22、cenario 2: Integrated RAN 27 6.1.2.2.1 Architecture/network implication28 6.1.2.2.1.1 Integrated RAN based on Rel.6 MBMS framework28 6.1.2.2.1.2 Integrated RAN, using the “one tunnel“ approach.30 6.1.2.2.2 Functions and procedures 32 6.1.2.2.3 Support of service continuity.35 6.1.2.2.4 Connection st
23、ate of the UE36 6.1.2.2.5 Specification Impacts 36 6.1.2.2.6 Benefits and drawbacks.37 6.1.2a LCR TDD + LCR TDD DL37 6.1.2a.1 Scenario 1: TDD + TDD DL.37 6.1.2a.1.1 Analysis of functions.37 6.1.2a.1.2 Specification impacts.38 6.1.2a.1.3 Evaluation38 6.1.2a.2 Scenario 2: TDD + Multicarrier TDD DL.38
24、6.1.2a.2.1 Analysis of functions.38 6.1.2a.2.2 Specification impacts.38 6.1.2a.2.3 Evaluation39 6.1.2a.3 Scenario 3: TDD + Multicarrier TDD DL.39 6.1.2a.3.1 Analysis of functions.39 6.1.2a.3.2 Specification impacts.39 6.1.2a.3.3 Evaluation40 6.1.3 Interference considerations for simultaneous operati
25、on of unicast and MBMS auxiliary carrier.40 6.1.3.1 Solution 1: Allow a guard band between paired the UL carrier and the unpaired MBMS carrier 40 6.1.3.2 Solution 2: Smart scheduling 40 6.1.3.3 Solution 3: GSM fallback for MBMS dedicated frequency40 6.1.4 RF Aspects of Re-configuration of Rx diversi
26、ty terminal to support two independent frequency layers.41 6.2 SFN operation for MBMS41 6.2.1 TD-CDMA - Time multiplexing of MBMS with unicast carrier41 6.2.1A 1.28 Mcps TDD - Time multiplexing of MBMS with unicast carrier 42 6.2.2 TD-CDMA - MBMS for auxiliary carrier 42 6.2.2A 1.28 Mcps TDD - MBMS
27、for dedicated carrier43 6.2.3 MBMS dedicated carrier with SFN operations Study 1 (FDD) .43 6.2.3.1 Simulation assumptions and physical channel conditions.43 6.2.3.2 Spectral efficiency.44 6.2.4 MBMS dedicated carrier with SFN operations Study 2 (FDD) .44 6.2.4.1 Simulation assumptions and physical c
28、hannel conditions.44 6.2.4.2 Spectral efficiency.45 7 Conclusions and Recommendations.46 7.1 Conclusions.46 7.1.1 Dual receiver UEs.46 7.1.2 Network architecture considerations for separate MBMS carrier.46 7.1.3 SFN operation for MBMS 46 ETSI ETSI TR 125 905 V7.2.0 (2008-01) 5 3GPP TR 25.905 version
29、 7.2.0 Release 7 Annex A: Change history 48 History 49 ETSI ETSI TR 125 905 V7.2.0 (2008-01) 6 3GPP TR 25.905 version 7.2.0 Release 7 Foreword This Technical Report (TR) has been produced by ETSI 3rd Generation Partnership Project (3GPP). The present document may refer to technical specifications or
30、 reports using their 3GPP identities, UMTS identities or GSM identities. These should be interpreted as being references to the corresponding ETSI deliverables. The cross reference between GSM, UMTS, 3GPP and ETSI identities can be found under http:/webapp.etsi.org/key/queryform.asp. The contents of
31、 the present document are subject to continuing work within the TSG and may change following formal TSG approval. Should the TSG modify the contents of the present document, it will be re-released by the TSG with an identifying change of release date and an increase in version number as follows: Ver
32、sion x.y.z where: x the first digit: 1 presented to TSG for information; 2 presented to TSG for approval; 3 or greater indicates TSG approved document under change control. y the second digit is incremented for all changes of substance, i.e. technical enhancements, corrections, updates, etc. z the t
33、hird digit is incremented when editorial only changes have been incorporated in the document. ETSI ETSI TR 125 905 V7.2.0 (2008-01) 7 3GPP TR 25.905 version 7.2.0 Release 7 1 Scope The present document summarizes the work done under the study item “Improvement of the Multimedia Broadcast Multicast S
34、ervice (MBMS) in UTRAN“ defined in 1 by listing technical concepts addressing the objectives of the study item, analysing these technical concepts and recommending a way forward of the study item. 2 References The following documents contain provisions which, through reference in this text, constitu
35、te provisions of the present document. References are either specific (identified by date of publication, edition number, version number, etc.) or non-specific. For a specific reference, subsequent revisions do not apply. For a non-specific reference, the latest version applies. In the case of a ref
36、erence to a 3GPP document (including a GSM document), a non-specific reference implicitly refers to the latest version of that document in the same Release as the present document. 1 3GPP TD RP-050746: “Proposed Study Item on Improvement of the Multimedia Broadcast Multicast Service (MBMS) in UTRAN“
37、. 2 MBMS User Service Extensions WI description, http:/www.3gpp.org/specs/WorkItem-info/WI-34038.htm 3 Packet Switched Streaming Enhancements (PSSe) WI, http:/www.3gpp.org/ftp/tsg_sa/TSG_SA/TSGS_32/docs/SP-060361.zip 4 3GPP TR 25.803 v6.0.0 “S-CCPCH Performance for MBMS“ 5 3GPP TS 25.346: “Introduct
38、ion of the Multimedia Broadcast/Multicast Service (MBMS) in the Radio Access Network (RAN); Stage 2“. 3 Definitions, symbols and abbreviations 3.1 Definitions For the purposes of the present document, the following terms and definitions apply. : . 3.2 Symbols For the purposes of the present document
39、, the following symbols apply: 3.3 Abbreviations For the purposes of the present document, the following abbreviations apply: UMTS Universal Mobile Telecommunications System UTRAN UMTS Terrestrial Radio Access Network MBMS Multimedia Broadcast Multicast Service ETSI ETSI TR 125 905 V7.2.0 (2008-01)
40、8 3GPP TR 25.905 version 7.2.0 Release 7 MCCH MBMS point-to-multipoint Control Channel MICH MBMS notification Indicator Channel MTCH MBMS point-to-multipoint Traffic Channel SFN Single Frequency Network 4 Introduction The objective of this study item 1 is to analyse the feasibility and merits of pot
41、ential 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 sho
42、uld 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
43、 of MBMS in the physical layer 5 Outline of proposals 5.1 Dual receiver UEs 5.1.1 FDD + WCDMA DL Since MBMS is intended to serve a large user population, the usage of radio resources must be managed efficiently to avoid system overload due to MBMS services which could degrade the quality of the unic
44、ast services. With the use of dual receiver UE, the overload traffic condition can be reduced by delivering the MBMS traffic over a separate frequency band from that used for unicast services. Thereby the impact between dedicated and MBMS traffice can be minimized, and the available data rates for M
45、BMS can be maximized. Even though the UE with dual receiver capability enables the reception of MBMS services on a separate frequency band, it is not yet clear how MBMS services can be delivered over a separate frequency band in the current MBMS infrastructure. One possible way of achieving this is
46、the use of overlay FDD networks for delivery of MBMS services. This allows UMTS operators to offer subscribers MBMS services without impacting other voice and data services. The additional functional and infrastructure requirements imposed by MBMS via overlay spectrum is analyzed based on the curren
47、t Rel.6 MBMS framework. 5.1.1.1 UE capabilities A dual receiver UE for the study in the scope of this SI should be capable of simultaneously receiving dedicated services and MBMS PtP / PtM services on one frequency A plus MBMS services sent on PtM bearers on a separate frequency B e.g.: Frequency A
48、(FDD, dedicated services + MBMS, frequency on which the UE is camping for reception of dedicated services): o Channels necessary independent from MBMS o MICH or MCCH (FFS) independently from the MBMS services on frequency B o MTCH, (FFS) depending on the reception of MBMS services on frequency B wit
49、h the dual receiver Frequency B (FDD) (additional MBMS capabilities): o BCCH ETSI ETSI TR 125 905 V7.2.0 (2008-01) 9 3GPP TR 25.905 version 7.2.0 Release 7 o MICH or MCCH (FFS) independently from the reception of MBMS services or dedicated services on frequency A o MTCH with the dual receiver, possibly depending on the reception of MBMS services on the frequency A Detailed capabilities depend on the scenario and are FFS. Dual receiver UEs can be useful for different scenarios as outlined below: 5.1.1.2 Scenario 1: MBMS multicarrier Rel-6 networ
