ETSI TS 123 246 V8.2.0 (2009-01) Technical Specification Universal Mobile Telecommunications System (UMTS); LTE; Multimedia Broadcast/Multicast Service (MBMS); Architecture and functional description (3GPP TS 23.246 version 8.2.0 Release 8) 3GPP TS 23.246 version 8.2.0 Release 8 1 ETSI TS 123 246 V8.2.0 (2009-01) Reference RTS/TSGS-0223246v820 Keywords LTE, 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 à but non lucratif enregistrée à la Sous-Préfecture de Grasse (06) N° 7803/88 Important notice Individual copies of the present document can be downloaded from: http://www.etsi.org The present document may be made available in more than one electronic version or in print. In any case of existing or perceived difference in contents between such versions, the reference version is the Portable Document Format (PDF). In case of dispute, the reference shall be the printing on ETSI printers of the PDF version kept on a specific network drive within ETSI Secretariat. Users of the present document should be aware that the document may be subject to revision or change of status. Information on the current status of this and other ETSI documents is available at http://portal.etsi.org/tb/status/status.asp If you find errors in the present document, please send your comment to one of the following services: http://portal.etsi.org/chaircor/ETSI_support.asp Copyright Notification No part may be reproduced except as authorized by written permission. The copyright and the foregoing restriction extend to reproduction in all media. © European Telecommunications Standards Institute 2009. All rights reserved. DECTTM, PLUGTESTSTM, UMTSTM, TIPHONTM, the TIPHON logo and the ETSI logo are Trade Marks of ETSI registered for the benefit of its Members. 3GPPTM is a Trade Mark of ETSI registered for the benefit of its Members and of the 3GPP Organizational Partners. LTE™ is a Trade Mark of ETSI currently being registered for the benefit of its Members and of the 3GPP Organizational Partners. GSM® and the GSM logo are Trade Marks registered and owned by the GSM Association. ETSI 3GPP TS 23.246 version 8.2.0 Release 8 2 ETSI TS 123 246 V8.2.0 (2009-01) 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 Specification (TS) 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 http://webapp.etsi.org/key/queryform.asp. ETSI 3GPP TS 23.246 version 8.2.0 Release 8 3 ETSI TS 123 246 V8.2.0 (2009-01) Contents Intellectual Property Rights ................................................................................................................................ 2 Foreword ............................................................................................................................................................. 2 Foreword ............................................................................................................................................................. 6 1 Scope ........................................................................................................................................................ 7 2 References ................................................................................................................................................ 7 3 Definitions and abbreviations ................................................................................................................... 8 3.1 Definitions .......................................................................................................................................................... 8 3.2 Abbreviations ..................................................................................................................................................... 8 4 MBMS Architecture ................................................................................................................................. 8 4.1 Overview ............................................................................................................................................................ 8 4.2 Reference Architecture Model ........................................................................................................................... 9 4.3 MBMS Specific Reference points .................................................................................................................... 10 4.3.1 Gmb ............................................................................................................................................................ 10 4.3.2 Mz ............................................................................................................................................................... 10 4.3.3 Reference Points for Evolved Packet Systems............................................................................................ 10 4.4 MBMS Service Provision ................................................................................................................................. 11 4.4.1 MULTICAST MODE ................................................................................................................................. 11 4.4.1.1 Subscription .......................................................................................................................................... 12 4.4.1.2 Service announcement .......................................................................................................................... 12 4.4.1.3 Joining ................................................................................................................................................... 13 4.4.1.4 Session Start .......................................................................................................................................... 13 4.4.1.5 MBMS notification ............................................................................................................................... 13 4.4.1.6 Data transfer .......................................................................................................................................... 13 4.4.1.7 Session Stop .......................................................................................................................................... 13 4.4.1.8 Leaving ................................................................................................................................................. 13 4.4.2 Multicast Mode timeline ............................................................................................................................. 13 4.4.2.1 Period between Service Announcement and Session Start ................................................................... 13 4.4.2.2 Period between Service Announcement and Service Subscription ....................................................... 13 4.4.2.3 Period between Service Announcement and Joining ............................................................................ 14 4.4.2.4 Period between Joining and Session Start ............................................................................................. 14 4.4.2.5 Period between Session Start and First Data Arrival ............................................................................ 14 4.4.2.6 Period between Session Start and Session Stop .................................................................................... 14 4.4.2.7 Session Update ...................................................................................................................................... 14 4.4.3 BROADCAST MODE ............................................................................................................................... 14 4.4.3.1 Service announcement .......................................................................................................................... 16 4.4.3.1a UE local service activation .................................................................................................................... 16 4.4.3.2 Session Start .......................................................................................................................................... 16 4.4.3.3 MBMS notification ............................................................................................................................... 16 4.4.3.4 Data transfer .......................................................................................................................................... 16 4.4.3.5 Session Stop .......................................................................................................................................... 17 4.4.3.6 Session Update ...................................................................................................................................... 17 4.4.4 Broadcast Mode timeline ............................................................................................................................ 17 4.4.4.1 Period between Service Announcement and Session Start ................................................................... 17 4.4.4.2 Period between Session Start and First Data Arrival ............................................................................ 17 4.4.4.3 Period between Session Start and Session Stop .................................................................................... 17 5 Functional Entities To Support MBMS .................................................................................................. 17 5.0 General ............................................................................................................................................................. 17 5.1 Broadcast-Multicast Service Centre (BM-SC) ................................................................................................. 17 5.1.1 Membership Function ................................................................................................................................. 18 5.1.2 Session and Transmission Function ............................................................................................................ 18 5.1.3 Proxy and Transport Function .................................................................................................................... 19 5.1.4 Service Announcement Function ................................................................................................................ 19 5.1.4a MBMS Security Function ........................................................................................................................... 19 ETSI 3GPP TS 23.246 version 8.2.0 Release 8 4 ETSI TS 123 246 V8.2.0 (2009-01) 5.1.5 MBMS Content Transfer for 2G and 3G for the same MBMS User Service ............................................. 20 5.1.5.1 General .................................................................................................................................................. 20 5.1.5.2 Separate MBMS Bearer Services for 2G and 3G for the same MBMS User Service ........................... 20 5.1.5.3 Same MBMS Bearer Service for 2G and 3G for the same MBMS User Service ................................. 20 5.1.6 Location Dependent Content Transfer for the same MBMS User Service (Broadcast Mode only) ........... 20 5.2 User Equipment ................................................................................................................................................ 21 5.3 UTRAN/GERAN ............................................................................................................................................. 21 5.4 SGSN ................................................................................................................................................................ 21 5.5 GGSN ............................................................................................................................................................... 22 5.6 MBMS Data Sources and Content Provider ..................................................................................................... 22 5.7 Other Functional Element ................................................................................................................................ 22 5.7.1 Void ............................................................................................................................................................ 22 5.7.2 CBC ............................................................................................................................................................ 22 5.7.3 Void ............................................................................................................................................................ 22 5.8 Functional Elements for the Evolved Packet System ....................................................................................... 22 5.8.1 MBMS 2 function ....................................................................................................................................... 22 5.8.2 MBMS 1 function ....................................................................................................................................... 23 6 MBMS Attributes and Parameters ......................................................................................................... 23 6.1 MBMS UE Context .......................................................................................................................................... 23 6.2 MBMS Bearer Context ..................................................................................................................................... 24 6.3 Quality-of-Service ............................................................................................................................................ 26 6.3.1 MBMS QoS distribution tree ...................................................................................................................... 27 6.4 Temporary Mobile Group Identity .............................................................................................................. 27 7 Architectural Aspects of MBMS User Services ..................................................................................... 27 7.1 Alternative User Service Support ..................................................................................................................... 28 7.2 Avoid overload in SGSN, GGSN and BM-SC caused by Joining ................................................................... 28 7.3 Access aspects of MBMS user services ........................................................................................................... 28 8 MBMS Procedures ................................................................................................................................. 28 8.1 MBMS Notification .......................................................................................................................................... 28 8.1.1 Iu mode notification (UTRAN and GERAN) ............................................................................................. 28 8.1.2 A/Gb mode notification (GERAN) ............................................................................................................. 29 8.2 MBMS Multicast Service Activation ............................................................................................................... 29 8.2.1 Void ............................................................................................................................................................ 31 8.3 MBMS Session Start Procedure ....................................................................................................................... 31 8.3.1 MBMS Session Start Procedure for GERAN and UTRAN ........................................................................ 31 8.3.2 MBMS Session Start Procedure for E-UTRAN.......................................................................................... 33 8.4 MBMS Registration Procedure ........................................................................................................................ 34 8.5 MBMS Session Stop Procedure ....................................................................................................................... 35 8.5.1 MBMS Session Stop Procedure for GERAN and UTRAN ........................................................................ 35 8.5.2 MBMS Session Stop Procedure for E-UTRAN .......................................................................................... 37 8.6 MBMS De-Registration Procedure .................................................................................................................. 37 8.6.0 Common MBMS De-Registration procedure ............................................................................................. 37 8.6.1 BM-SC initiated MBMS De-Registration Procedure ................................................................................. 38 8.7 MBMS Multicast Service Deactivation ............................................................................................................ 39 8.8 MBMS Session Update procedure ................................................................................................................... 41 8.8.1 General ........................................................................................................................................................ 41 8.8.2 SGSN initiated Session Update for MBMS Multicast service .................................................................... 42 8.8.3 BM-SC initiated Session Update for MBMS Broadcast service ................................................................. 42 8.9 MBMS UE Context Synchronisation Procedure .............................................................................................. 43 8.9a MBMS feature support indication .................................................................................................................... 44 8.10 Inter SGSN Routeing Area Update .................................................................................................................. 44 8.10a Inter-system Intra-SGSN change ...................................................................................................................... 46 8.11 Inter SGSN Serving RNS Relocation Procedure .............................................................................................. 46 8.12 MBMS Broadcast Service Activation .............................................................................................................. 48 8.13 MBMS Broadcast service de-activation ........................................................................................................... 48 8.14 Void .................................................................................................................................................................. 48 8.15 MBMS UE Linking/De-linking mechanism ..................................................................................................... 48 8.16 MBMS Service Request Procedure .................................................................................................................. 49 8.17 Notification in case of parallel services ............................................................................................................ 50 8.17.1 Notification of incoming CS domain call during an ongoing MBMS session ............................................ 50 ETSI 3GPP TS 23.246 version 8.2.0 Release 8 5 ETSI TS 123 246 V8.2.0 (2009-01) 8.17.2 Notification of additional MBMS session during an ongoing MBMS session ........................................... 50 8.17.3 Notification of Mobile Terminating PS data during an ongoing MBMS session ....................................... 50 8.17.4 Notification of MBMS session during an ongoing CS or PS domain "connection" ................................... 50 9 Security................................................................................................................................................... 51 10 Charging requirement ............................................................................................................................. 51 10.1 General ............................................................................................................................................................. 51 10.2 Bearer level charging for MBMS ..................................................................................................................... 51 10.3 Application level charging for MBMS ............................................................................................................. 51 10.4 Generation of charging records in the VPLMN ............................................................................................... 52 11 Roaming Support for MBMS user services............................................................................................ 52 11.1 Scenarios description ........................................................................................................................................ 52 11.2 Scenario signalling flow ................................................................................................................................... 52 11.2.1 APN selection ............................................................................................................................................. 52 Annex A (Informative): Void ......................................................................................................................... 54 Annex B (Informative): Further developments of eMBMS ........................................................................ 55 B.1 Co-location considerations for eMBMS Functional Elements ............................................................... 55 B.1.1 Architecture for Evolved Packet System with E-UTRAN, UTRAN and GERAN access networks (MBMS Broadcast Mode only) ........................................................................................................................ 55 Annex B (Informative): Change history ....................................................................................................... 56 History .............................................................................................................................................................. 58 ETSI 3GPP TS 23.246 version 8.2.0 Release 8 6 ETSI TS 123 246 V8.2.0 (2009-01) Foreword This Technical Specification has been produced by the 3rd 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. ETSI 3GPP TS 23.246 version 8.2.0 Release 8 7 ETSI TS 123 246 V8.2.0 (2009-01) 1 Scope The present document describes the stage 2 description (architectural solution and functionalities) for the MBMS Bearer Service, which includes, together with MBMS User Services defined in TS 26.346 [7], all the elements necessary to realise the stage 1 requirements in TS 22.146 [2] and TS 22.246 [6]. The present document also includes considerations on the manner in which User Services should make use of the MBMS Bearer Service described herein. It should be noted that the specification of MBMS User Services in TS 26.346 [7] takes precedence over User Service aspects described in this document. The present document includes information applicable to network operators, service providers and manufacturers. 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; Stage 1". [3] 3GPP TS 23.107: "Quality of Service (QoS) concept and architecture". [4] 3GPP TS 29.061: "Interworking between the Public Land Mobile Network (PLMN) supporting packet based services and Packet Data Networks (PDN)". [5] 3GPP TS 33.246: "Security of Multimedia Broadcast/Multicast Service". [6] 3GPP TS 22.246: "Multimedia Broadcast/Multicast Service (MBMS) user services". [7] 3GPP TS 26.346: "MBMS: Protocols and Codecs". [8] void. [9] void. [10] 3GPP TS 25.346: "Introduction of the Multimedia Broadcast Multicast Service (MBMS) in the Radio Access Network". [11] 3GPP TS 43.246: "Technical Specification Group GSM/EDGE Radio Access Network; Multimedia Broadcast Multicast Service (MBMS) in the GERAN". [12] 3GPP TS 23.125: "Overall high level functionality and architecture impacts of flow based charging; Stage 2". [13] 3GPP TS 23.003: "Numbering, addressing and identification". [14] 3GPP TS 32.422: "Subscriber and equipment trace; Trace control and Configuration Management (CM)". [15] 3GPP TS 23.060: "General Packet Radio Service (GPRS); Service description; Stage 2". [16] 3GPP TS 23.401: "GPRS enhancements for E-UTRAN Access". ETSI 3GPP TS 23.246 version 8.2.0 Release 8 8 ETSI TS 123 246 V8.2.0 (2009-01) 3 Definitions and abbreviations 3.1 Definitions For the purposes of the present document, the terms and definitions defined in TR 21.905 [1] and TS 22.146 [2] and the following apply: MBMS Service Announcement: Mechanism to allow users to be informed about the MBMS user services available. MBMS Bearer Service: the service provided by the PS Domain to MBMS User Services to deliver IP multicast datagrams to multiple receivers using minimum network and radio resources. MBMS User Service: the MBMS service provided to the end user by means of the MBMS Bearer Service and possibly other capabilities. MBMS Service Area: The area within which data of a specific MBMS session are sent. Each individual MBMS session of an MBMS Bearer Service may be sent to a different MBMS Service Area. This MBMS Service Area is the same or a subset of the Multicast or Broadcast Service Area as defined in TS 22.146 [2]. An MBMS Service Area smaller than the Multicast or Broadcast Service Area is typically used for localized services. 3.2 Abbreviations For the purposes of the present document, the abbreviations in TR 21.905 [1] and TS 22.146 [2] apply. TMGI Temporary Mobile Group Identity TPF Traffic Plane Function 4 MBMS Architecture 4.1 Overview MBMS is a point-to-multipoint service in which data is transmitted from a single source entity to multiple recipients. Transmitting the same data to multiple recipients allows network resources to be shared. The MBMS bearer service offers two modes: - Broadcast Mode; - Multicast Mode. MBMS architecture enables the efficient usage of radio-network and core-network resources, with an emphasis on radio interface efficiency. MBMS is realised by the addition of a number of new capabilities to existing functional entities of the 3GPP architecture and by addition of a number of new functional entities. The existing PS Domain functional entities (GGSN, SGSN, UTRAN, GERAN and UE) are enhanced to provide the MBMS Bearer Service. In the bearer plane, this service provides delivery of IP Multicast datagrams from the Gi reference point to UEs with a specified Quality of Service. In the control plane, this service provides mechanisms for: - managing the MBMS bearer service activation status of UEs (in the case of multicast mode); - outsourcing authorisation decisions to the MBMS User Service (i.e. to the BM-SC) (in the case of multicast mode); - providing control of session initiation/termination by the MBMS User Service and managing bearer resources for the distribution of MBMS data (in the case or multicast and broadcast modes). ETSI 3GPP TS 23.246 version 8.2.0 Release 8 9 ETSI TS 123 246 V8.2.0 (2009-01) A particular instance of the MBMS Bearer Service is identified by an IP Multicast Address and an APN Network Identifier. The boundary of the MBMS Bearer Service is the Gmb and Gi reference points as shown in Figure 1 below. The former provides access to the control plane functions and the latter the bearer plane. A functional entity, the Broadcast Multicast Service Centre (BM-SC) provides a set of functions for MBMS User Services. BM-SC functions for different MBMS User Services may be supported from the same or different physical network elements. 4.2 Reference Architecture Model P D N (e.g. Internet ) Content Provider / Multicast Broadc ast HLR Source Gr Gmb Content Uu Iu Gn/Gp Provider / UE UTRAN SGSN GTGPSFN BM - SC MBSuroolutairccdaces ats t Gi Gi Mz Iu/Gb BM-SC Um UE GERAN Other PLMN Note 1: network entities and reference points solely used by the MBMS user service (e.g. for service announcement as described in section 4.4.1.2) are not shown in this figure. Note 2: Gp applies only when SGSN and GGSN are in different PLMNs. Figure 1a: Reference architecture to support the MBMS bearer service PDN Gateway MBMS SGi 1 M3 Sm SGmb "LTE - Uu" UE E-UTRAN MBMS eBM-SC Content Provider 2 M1 SGi-mb Figure 1b: Reference architecture for Evolved Packet System with E-UTRAN(MBMS Broadcast Mode only) Editor's Note: It is FFS how these functions are allocated to functional entity/entities of the Evolved Packet System. Editor's Note: MCE (Multi-cell/Multicast Co-ordination Entity) is not shown in the figure. NOTE: The eBM-SC uses both MBMS Bearers (over SGmb/SGi-mb) and EPS Bearers (over SGi). ETSI