ETSI TR 126 946 V9.0.0 (2010-01)

Digital cellular telecommunications system (Phase 2+); Universal Mobile Telecommunications System (UMTS); LTE; Multimedia Broadcast/Multicast Service (MBMS) user service guidelines (3GPP TR 26.946 version 9.0.0 Release 9)

ETSI TR 126 946 V9.0.0 (2010-01)

Name:ETSI TR 126 946 V9.0.0 (2010-01)   Standard name:Digital cellular telecommunications system (Phase 2+); Universal Mobile Telecommunications System (UMTS); LTE; Multimedia Broadcast/Multicast Service (MBMS) user service guidelines (3GPP TR 26.946 version 9.0.0 Release 9)
Standard number:ETSI TR 126 946 V9.0.0 (2010-01)   language:English language
Release Date:17-Jan-2010   technical committee:3GPP SA 4 - Codec
Drafting committee:   ICS number:
ETSI TR 126 946 V9.0.0 (2010-01)
Technical Report

Digital cellular telecommunications system (Phase 2+);
Universal Mobile Telecommunications System (UMTS);
LTE;
Multimedia Broadcast/Multicast Service (MBMS)
user service guidelines
(3GPP TR 26.946 version 9.0.0 Release 9)

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3GPP TR 26.946 version 9.0.0 Release 9 1 ETSI TR 126 946 V9.0.0 (2010-01)



Reference
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Keywords
GSM, LTE, UMTS
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ETSI

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3GPP TR 26.946 version 9.0.0 Release 9 2 ETSI TR 126 946 V9.0.0 (2010-01)
Intellectual Property Rights
IPRs essential or potentially essential to the present document may have been declared to ETSI. The information
pertaining to these essential IPRs, if any, is publicly available for ETSI members and non-members, and can be found
in ETSI SR 000 314: "Intellectual Property Rights (IPRs); Essential, or potentially Essential, 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. 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 Project (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 can be found under
.
ETSI

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3GPP TR 26.946 version 9.0.0 Release 9 3 ETSI TR 126 946 V9.0.0 (2010-01)
Contents
Intellectual Property Rights . 2
Foreword . 2
Foreword . 5
Introduction . 5
1 Scope . 6
2 References . 6
3 Definitions and abbreviations . 7
3.1 Definitions . 7
3.2 Abbreviations . 8
4 Overview . . 9
4.1 Phasing model . 9
4.2 System overview . 10
5 Description of User Service procedures . 11
5.1 User Service Discovery / Announcement . 11
5.2 User Service Initiation / termination procedure . 11
5.3 Session Start / Stop . 12
5.4 Data transmission . 12
5.5 Associated-Delivery procedures . 12
5.5.1 File Repair service . 12
5.5.2 Content reception reporting . 12
6 Delivery methods . 12
6.1 Download delivery method . 12
6.1.1 SDL diagram of the download delivery method for the MBMS UE . 14
6.1.2 Transport of MBMS download data . 16
6.1.3 Repair Symbol Request . 18
6.1.3.1 Option 1: Determination of a minimum set of source symbols for repair . 18
6.1.3.2 Option 2: Determination of a sufficient set of consecutive encoding symbols for repair . 19
6.1.3.3 Maximum Gaussian elimination . 20
6.1.4 On choosing the SDU size . 20
6.1.4.1 Analysis . 21
6.2 Streaming delivery method. 21
7 Usage scenarios . 22
7.1 Service Discovery/Announcement . 22
7.2 MBMS download delivery method . 23
7.2.1 Example: Video clip download service use-case . 23
7.2.1.1 Use-case description. 23
7.2.1.2 Announced Metadata Fragments . 24
7.2.1.3 Reception of a video clip . 24
7.2.1.4 File Repair procedure . 26
7.2.2 The usage of the MBMS session Identity in file download delivery . 28
7.2.2.1 Introduction . 28
7.2.2.2 Example 1: Usage of the Session ID to detect repetition . 28
7.2.2.3 Example 2: Declaration of files of a different MBMS bearer session in the FDT . 29
7.2.2.4 Example 3: Declaration of files of an MBMS bearer session in several FDT Instances . 30
7.3 MBMS streaming delivery method . 31
8 Codecs and formats . 31
Annex A: MBMS Forward Error Correction performance. 32
A.1 Theoretical performance . 32
ETSI

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3GPP TR 26.946 version 9.0.0 Release 9 4 ETSI TR 126 946 V9.0.0 (2010-01)
A.2 Simulation results . 32
A.2.1 Simulation conditions and assumptions (UTRAN) . 33
A.2.2 Simulation conditions and assumptions (GERAN) . 34
A.2.3 Simulation results: UTRAN download. 35
A.2.4 Simulation results UTRAN streaming . 36
A.2.5 Simulation results GERAN download . 36
A.2.6 Simulation results GERAN streaming . 37
Annex B: Change history . 38
History . 39

ETSI

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3GPP TR 26.946 version 9.0.0 Release 9 5 ETSI TR 126 946 V9.0.0 (2010-01)
Foreword
rd
This Technical Report has been produced by the 3 Generation Partnership Project (3GPP).
The contents of 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:
Version 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 third digit is incremented when editorial only changes have been incorporated in the document.
Introduction
MBMS user services can be built on top of the MBMS bearer service. The present document describes the usage of the
two delivery methods, which are defined in [6]. The two delivery methods are streaming and download. Examples of
applications using the download delivery method are news and software upgrades. Delivery of live music is an example
of an application using the streaming delivery method.
The objective of the present document is to provide an overview of the MBMS System, and describes how the MBMS
User Services use the MBMS Bearer Services.
ETSI

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3GPP TR 26.946 version 9.0.0 Release 9 6 ETSI TR 126 946 V9.0.0 (2010-01)
1 Scope
The present document is only informative. In case there are any contradiction between the present document and
26.346, then the 3GPP TS 26.346 takes precedence.
2 References
The following documents contain provisions which, through reference in this text, constitute 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 reference 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 TR 21.905: "Vocabulary for 3GPP Specifications".
[2] 3GPP TS 22.146: "Multimedia Broadcast/Multicast Service (MBMS); Stage 1".
[3] 3GPP TS 22.246: "Multimedia Broadcast/Multicast Service (MBMS) user services; Stage 1".
[4] 3GPP TS 23.246: "Multimedia Broadcast/Multicast Service (MBMS); Architecture and functional
description".
[5] 3GPP TS 25.346: "Introduction of the Multimedia Broadcast/Multicast Service (MBMS) in the
Radio Access Network (RAN); Stage 2".
[6] 3GPP TS 26.346: "Multimedia Broadcast/Multicast Service (MBMS); Protocols and codecs".
[7] 3GPP TS 33.220: "Generic Authentication Architecture (GAA); Generic bootstrapping
architecture".
[8] 3GPP TS 33.246: "3G Security; Security of Multimedia Broadcast/Multicast Service (MBMS)".
[9] IETF RFC 3926 (October 2004): "FLUTE - File Delivery over Unidirectional Transport", T. Paila,
M. Luby, R. Lehtonen, V. Roca and R. Walsh.
[10] IETF RFC 3450 (December 2002): "Asynchronous Layered Coding (ALC) Protocol Instantiation",
M. Luby, J. Gemmell, L. Vicisano, L. Rizzo and J. Crowcroft.
[11] IETF RFC 3451 (December 2002): "Layered Coding Transport (LCT) Building Block", M. Luby,
J. Gemmell, L. Vicisano, L. Rizzo, M. Handley and J. Crowcroft.
[12] IETF RFC 3452 (December 2002): "Forward Error Correction (FEC) Building Block", M. Luby,
L. Vicisano, J. Gemmell, L. Rizzo, M. Handley and J. Crowcroft.
[13] IETF RFC 3695 (February 2004): "Compact Forward Error Correction (FEC) Schemes", M. Luby
and L. Vicisano.
[14] IETF RFC 2327 (April 1998): "SDP: Session Description Protocol", M. Handley and V. Jacobson.
[15] IETF RFC 2357 (June 1998): "IETF Criteria for Evaluating Reliable Multicast Transport and
Application Protocols", A. Mankin, A. Romanow, S. Bradner and V. Paxson.
[16] IETF RFC 3550 (July 2003): "RTP: A Transport Protocol for Real-Time Applications",
H. Schulzrinne, S. Casner, P. Frederick and V. Jacobson.
ETSI

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3GPP TR 26.946 version 9.0.0 Release 9 7 ETSI TR 126 946 V9.0.0 (2010-01)
[17] ITU-T Recommendation H.264 (2003): "Advanced video coding for generic audiovisual services"
| ISO/IEC 14496-10:2003: "Information technology - Coding of audio-visual objects -
Part 10: Advanced Video Coding".
[18] IETF RFC 3984 (February 2005): "RTP payload Format for H.264 Video", S. Wenger,
M.M. Hannuksela, T. Stockhammer, M. Westerlund and D. Singer.
3 Definitions and abbreviations
3.1 Definitions
For the purposes of the present document, the terms and definitions given in 3GPP TR 21.905 [1] and the following
apply.
broadcast service: See 3GPP TS 22.146 [2].
broadcast session: See 3GPP TS 22.146 [2].
Local MBMS Area: area of a MBMS service, where the service content is the same. One MBMS service may have
different content in different local broadcast areas
Multimedia Broadcast/Multicast Service (MBMS): See 3GPP TS 22.146 [2].
MBMS user services: See 3GPP TS 22.246 [3].
MBMS user service discovery/announcement: user service discovery refers to methods for the UE to obtain the list of
available MBMS user services along with information on the user service
The user service announcement refers to methods for the MBMS service provider to make the list of available MBMS
user services along with information on the user service available to the UE.
MBMS user service initiation: MBMS user service initiation refers to the UE mechanism to set up the reception the
MBMS user service data
MBMS delivery method: mechanism used by a MBMS user service to deliver content
There are two MBMS delivery method instances: download and streaming.
MBMS download delivery method: delivery of discrete objects (e.g. files) by means of a MBMS download session
MBMS streaming delivery method: delivery of continuous media (e.g. real-time video) by means of a MBMS
streaming session
MBMS download session: time, protocols and protocol state (i.e. parameters) which define sender and receiver
configuration for the download of content files
MBMS streaming session: time, protocols and protocol state (i.e. parameters) which define sender and receiver
configuration for the streaming of content
multicast joining: See 3GPP TS 22.146 [2].
multicast service: See 3GPP TS 22.146 [2].
multicast session: See 3GPP TS 22.146 [2].
ETSI

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3GPP TR 26.946 version 9.0.0 Release 9 8 ETSI TR 126 946 V9.0.0 (2010-01)
3.2 Abbreviations
For the purposes of the present document, the following abbreviations apply:
ALC Asynchronous Layered Coding
APN Access Point Name
AVC Advanced Video Coding
BM-SC Broadcast-Multicast - Service Centre
CC Congestion Control
ERT Expected Residual Time
ESI Encoding Symbol ID
FDT File Delivery Table
FEC Forward Error Correction
FLUTE File deLivery over Unidirectional Transport
GGSN Gateway GPRS Serving Node
GPRS General Packet Radio Service
IP Internet Protocol
LCT Layered Coding Transport
MBMS Multimedia Broadcast/Multicast Service
MIME Multipurpose Internet Mail Extensions
MS Mobile Station
MSK MBMS Service Key
MTK MBMS Traffic Key
MUK MBMS User Key
PSS Packet Switch Streaming
PTM Point To Multipoint
PTP Point To Point
RTP Real-Time Transport Protocol
SBN Source Block Number
SCT Sender Current Time
SDP Session Description Protocol
TMGI Temporary Mobile Group Identity
TOI Transport Object Identifier
TSI Transport Session Identifier
UDP User Datagram Protocol
UE User Equipment
URI Uniform Resource Identifier
URL Uniform Resource Locator
XML eXtensible Markup Language
ETSI

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3GPP TR 26.946 version 9.0.0 Release 9 9 ETSI TR 126 946 V9.0.0 (2010-01)
4 Overview
4.1 Phasing model
MBMBMMSS U UEE PPhhasasee
BM-BM-SSC PhC Phaassee
MBMS MulMBMS Multtiiccasast t BeBearearerr Se Servrvicicee PhaPhasseses
SubSubscriptiscriptionon
UUsseerr S Seerrvviicce Die Dissccoveoverryy
UUsserer Se Serrvvice Dice Diiscoscoveveryry
/ A/ Annnonouncunceemmenentt
// A Annnonoununcemcemeentnt
SSeerrvviicce ane annonoununcceemmeentnt
JoJoiniininngg
UUsseerr Se Serrvviceice in initiitiaattiioonn
SeSessiossionn
((SSeerrvicevice Activa Activattiioonn))
SesSesssion stion startart
StaStarrtt
MBMS nMBMS nootitifificacatitioonn
DaData Reta Recepcepttioionn
DDaattaa T Trranansmsmissiissionon
DDaattaa tra trannssfeferr
SessSession Stion Stopop
SeSessiossionn
UUsser Ser Seerrvviicce e
StStoopp
teterrmmininaattioionn
LeLeaviavinngg

Figure 1: Mapping between MBMS Bearer and User Service phases
This mapping is applicable for the MBMS Broadcast and Multicast Modes.
It is assumed that the MBMS bearer service phases "Session start" and "MBMS notification" are handled autonomously
and without interaction from the receiver application perspective.
It is assumed, that the Session Start phase "triggers" MBMS Notification phase.
ETSI

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3GPP TR 26.946 version 9.0.0 Release 9 10 ETSI TR 126 946 V9.0.0 (2010-01)
4.2 System overview
Figure 2 gives an overview of functions for MBMS user services based on the MBMS download and the MBMS
streaming delivery methods. The figure includes the MBMS User service provision phases (arrow on the right side of
the figure). The Phase "MBMS User Service activation / deactivation" is an individual phase and is generally triggered
by a user action. The break in the sequence indicates that the service activation phases are independent from the session
start/stop and the data transfer phases. The service provider initiates the establishment of the MBMS User Plane
(Session Start/Stop and the Data Transfer Phases) when there is content to be transmitted.
InInterteraaccttiivvee B Beeararerer, e, ettcc
PPuullll--bbasase (e (ee.gg. v viiaa a P a Poorrttalal))
ee.g. hg. httpttp
LiLisstt o off sseerrvviciceses
MBMS UMBMS Usseerr
SMSMS/S/((CCBSBS))//MMMMSS,, e ettcc
EEnnvveelloope ipe innffoorrmmaattioion n
to sto seelleecctt
SeSerrvviiccee
PPuusshh--bbasase (e (ee.gg. v viia aa a P Poorrttalal))
ininclclududinging MET METAA I Innffoorrmmaattioion n
DisDisccovovereryy
e.e.g.g. S SAAPP//SSDDPP;; F FLLUTUTEE
liklike ae ann < g>
MMBBMMSS B Beareareerr
((iinnccll. M Muulltticicasastt//BBrroadoadccaasstt M Mooddee))
SeSelleeccttioionn
ofof S Seerrvvicicee
OOppttiiononalal
SShharareded S Seeccrret et
UsUserer
((hhttpttp--ddiiggesest-t-AAKKAA))
UUaa iinnteterrffaaccee:: http http--ddiiggesest (t (sseeee 33 33.22.2200))
DeDerriivvaatitionon o off
AuAutthheenntticicatatioion n
PaPasssswwoordrd
((NNoteote,, k keeyy mmaananagemgemeenntt no not agt agrreedeed in in S SAA33 y yeet)t)
((ee.g. B.g. BMM--SSC)C)
BMBM--SSCC
& Se& Servicrvicee
MMeemmberbersshhiipp
SSDDPP--InInfofo IGIGMMPP J Jooiinn / / lleeavavee DDeeffaaultultss B Beeararerer
((NNececesesssaarryy
((sseeee S Seerrvviicce Ae Acctivtivaatitionon
UsUserer
SSAA4 wor4 workk?)?)
SeServicrvicee Ac Acttiivavattiioonn (O(Onnllyy i inn (O(Onnllyy i inn
PPrrococededurure ie inn 2 233.224466))
ReRegigissttrraattiionon & &
/ D/ Deeaacctitivvaatitioonn MBMS MuMBMS Mulltticicaasstt Mo Moddee)) MBMBMMSS Mu Multlticaicasstt M Mooddee))
AAuuththenentiticcaatitionon
MBMSMBMS U UEE & & BS C BS Coonntteexxtt
((ccrreeatatiion /on / d deelleettiioonn))
MBMS MBMS
MBMSMBMS BS BS C Coonntteexxtt
BeBeaarreerr S Seervicrvicee
((aaccttivivaattioion /n / de deacacttiivvaattiionon))
OOpptitiononalal PaPaggee
TTrraannsmsmissiissioonn
CoContrntrooll
RTRTPP
CtCtrrll P Pllaneane CoContrntrooll TriTriggggeerr
StStrereaamm(s(s))
OOpptitiononalal
RTRTPP
StStrereaamm(s(s))
UsUseerr P Pllaneane
MCMC--RReellaayy
MBMS MBMS
&&
UUsserer S Seerrvvicice e
SoSouurrccee
fifillee TTrrananssmmiittetterr
fifillee
MBMS BMBMS Beeaarreerr AAuuththenentiticcaatitionon
((sseeee D Daata Trta Traannssfeferr i inn 2 233.24.2466))
MMuullttiiccasast trt traffaffiicc MMuulltticicasastt tr traffaffiicc UnUniiccasast ot orr M Muullttiiccasast trt traffaffiicc
PosPostt--DDeeliveliverryy
InInterteraaccttiivvee B Beeararerer
PPrrococesesssiinngg
UUnniiccasast trt traaffifficc
SeSerrvveerr
CliClieenntt NeNettwworkork P Prrovoviiddeerr SerServviice Prce Proovviidderer PhPhaseasess

Figure 2: MBMS system overview
The MBMS Bearer Services are embedded in MBMS User Service procedures. The major part of the data is transferred
via the MBMS Bearer Service. MBMS User Services include Associated-Delivery procedures (e.g. file repair) to
augment the original MBMS Bearer sessions. Security functions are incorporated into the overview figure. One
dedicated user authentication procedure is depicted in conjunction with the MBMS Bearer Service Activation procedure
within the Session Establishment phase.
The figure contains client and network functions. Interactions, which are only applicable for the MBMS Multicast
Mode, are marked accordingly.
ETSI
AAppplplicicatiatioonn ( (ee.g.g. ex. exisistitinngg mmeeddiiaa pl playayerer)) an and d
SSeervirviccee E Ennaabblleer (er (e.gg. OM OMA)A)
MBMBMS UMS Usseerr S Seerrvviiccee R Reecceeiivveerr
FEFECC FEFECC
UUDDPP/IP/IP
MBMSMBMS Be Beaarreerr S Seerrvviiccee
ReRecceeiivveerr
FEFECC FEFECC
SeSessssiioonn UUsseerr Se Serrvvicice e ininiittiiaattiioonn UsUserer S Seerrvvicice De Diissccovoveerryy / /
DDaata Trta Traannssmmiissssiionon
SSttaarrt / St / Sttopop
/ ter/ termmiinnatiatioonn AAnnnnounouncceemmeentnt

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3GPP TR 26.946 version 9.0.0 Release 9 11 ETSI TR 126 946 V9.0.0 (2010-01)
5 Description of User Service procedures
5.1 User Service Discovery / Announcement
The "User Service Discovery / Announcement" phase provides all necessary information about available services and
needed parameters to become member of a service. User Service Discovery / Announcement mechanism can provide
information on available MBMS User services in pull mode, via the Web or WAP Portals, or in push mode, via SMS or
MBMS Download based User Service.
The User Service Discovery / Announcement phase provides all necessary information for the "Service Activation"
triggered by the UE. The necessary session parameters to configure the service activation are provided according to
Session Description Protocol (SDP) specification (RFC 2327 [14]), which are complemented by additional information
containing additional service parameters. Additionally, Service Discovery includes DRM/security descriptions.
In the case of a size-limited delivery method (e.g. SMS, MMS) being used during the Service Announcement /
Discovery phase, it should be recognized that Service Announcement messages are not of fixed length. Methods of
limiting the size of the message may be adopted. It is suggested that should a size-limited delivery method be selected,
parameters such as URI lengths and the number of Connection data and Media announcement fields should be chosen
appropriately.
5.2 User Service Initiation / termination procedure
For MBMS User service activation, the UE needs to perform a security function and the MBMS Bearer Service
activation procedures. In the case of MBMS Multicast Mode, an IGMP or MLD message is sent via a "default" PDP
context and triggers the creation of the MBMS UE context in various nodes. A MBMS Bearer Service (BS) context is
only created once when the very first MBMS UE context is created in a node. In the case of MBMS Broadcast Mode,
network-side elements establish the MBMS BS context without requiring user initiated messaging. The basic idea
behind these procedures is that several UEs share one single bearer. The IP Multicast address and information for the
MBMS User Service receiving application is given via the MBMS Service Discovery mechanism.
In case the service requires user authentication, security procedures are performed before the MBMS bearer Service
Activation procedure. The "user authentication" procedure is a service optional security procedure. A password is
derived from the shared secret (result of a GBA run) and used in the http-digest security procedure to authenticate the
user (see 3GPP TS 33.220 [7] and 3GPP TS 33.346 [8] for further details).
The "User Authentication & Service Membership" phase provides procedures to register and authenticate users. The
procedures shall follow the security specifications. In the case of MBMS Multicast Mode, this phase may authorize the
service activation request from the UE. This function is present when security procedures like authentication and traffic
encryption are required.
ETSI

---------------------- Page: 12 ------------------
...

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