1、 ETSI TS 125 446 V15.0.0 (2018-07) Universal Mobile Telecommunications System (UMTS); MBMS synchronisation protocol (SYNC) (3GPP TS 25.446 version 15.0.0 Release 15) TECHNICAL SPECIFICATION ETSI ETSI TS 125 446 V15.0.0 (2018-07)13GPP TS 25.446 version 15.0.0 Release 15Reference RTS/TSGR-0325446vf00
2、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 Important notice The present document can be downl
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13、ent does not constitute an endorsement by ETSI of products, services or organizations associated with those trademarks. Foreword This Technical Specification (TS) has been produced by ETSI 3rd Generation Partnership Project (3GPP). The present document may refer to technical specifications or report
14、s 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. Modal verbs terminolog
15、y In the present document “shall“, “shall not“, “should“, “should not“, “may“, “need not“, “will“, “will not“, “can“ and “cannot“ are to be interpreted as described in clause 3.2 of the ETSI Drafting Rules (Verbal forms for the expression of provisions). “must“ and “must not“ are NOT allowed in ETSI
16、 deliverables except when used in direct citation. ETSI ETSI TS 125 446 V15.0.0 (2018-07)33GPP TS 25.446 version 15.0.0 Release 15Contents Intellectual Property Rights 2g3Foreword . 2g3Modal verbs terminology 2g3Foreword . 5g31 Scope 6g32 References 6g33 Definitions and abbreviations . 6g33.1 Defini
17、tions 6g33.2 Abbreviations . 6g33.4 Specification notations . 7g34 General . 7g34.1 General aspects for the SYNC protocol for UTRAN . 7g34.1.1 General aspects . 7g34.2 General aspects for the SYNC protocol for E-UTRAN . 8g34.2.1 General aspects . 8g35 SYNC protocol version 1 . 8g35.1 General . 8g35.
18、1.1 Applicablity of SYNC protocol version 1. 8g35.1.1 Operation of the SYNC protocol 9g35.1.2 Interfaces of the SYNC protocol layer 9g35.2 SYNC protocol layer services 9g35.3 Services Expected from the UP Data Transport layer 9g35.4 Elementary procedures . 9g35.4.1 Transfer of User Data for MBMS pro
19、cedure 9g35.4.1.1 Successful operation 9g35.4.1.2 Unsuccessful operation . 10g35.4.2 Transfer of Synchronisation Information for MBMS procedure (without user data) . 10g35.4.2.1 Successful operation 10g35.4.2.2 Unsuccessful operation . 11g35.5 Elements for the SYNC protocol 11g35.5.1 General 11g35.5
20、.2 Frame format for the SYNC protocol . 12g35.5.2.1 Transfer of Synchronisation Information without payload (SYNC PDU Type 0) 12g35.5.2.2 Transfer of User Data for MBMS with uncompressed header (SYNC PDU Type 1) . 12g35.5.2.3 Transfer of User Data for MBMS with compressed header (SYNC PDU Type 2) .
21、13g35.5.2.4 Transfer of Synchronisation Information with Length of Packets (SYNC PDU Type 3) . 14g35.5.3 Coding of information elements in frames . 16g35.5.3.1 PDU Type . 16g35.5.3.2 Timestamp. 17g35.5.3.3 Packet Number 17g35.5.3.4 Elapsed Octet Counter . 17g35.5.3.5 Total Number Of Packet . 17g35.5
22、.3.6 Total Number Of Octet . 17g35.5.3.7 PDCP Information . 17g35.5.3.8 IPv6 Indicator 18g35.5.3.9 Uncompressed Payload IP header . 18g35.5.3.10 Header CRC 18g35.5.3.11 Payload CRC . 18g35.5.3.12 Padding . 18g35.5.3.13 Spare . 18g35.5.3.14 Spare extension . 18g35.5.3.15 Payload fields 19g35.5.3.16 L
23、ength of the Nth Packet 19g35.5.4 Timers . 19g3ETSI ETSI TS 125 446 V15.0.0 (2018-07)43GPP TS 25.446 version 15.0.0 Release 155.6 Handling of unknown, unforeseen and erroneous protocol data 19g35.6.1 General 19g35.6.2 CRC Calculation . 19g35.6.3 Relation between input and output of the Cyclic Redund
24、ancy Check 19g3Annex A (informative): Change history . 20g3History 21g3ETSI ETSI TS 125 446 V15.0.0 (2018-07)53GPP TS 25.446 version 15.0.0 Release 15Foreword This Technical Specification has been produced by the 3rdGeneration Partnership Project (3GPP). The contents of the present document are subj
25、ect 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
26、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
27、 editorial only changes have been incorporated in the document. ETSI ETSI TS 125 446 V15.0.0 (2018-07)63GPP TS 25.446 version 15.0.0 Release 151 Scope The present document specifies the MBMS Synchronisation Protocol. For the release of this specification it is used on Iu towards UTRAN and M1 towards
28、 E-UTRAN. 2 References The following documents contain provisions which, through reference in this text, constitute provisions of the present document. g404 References are either specific (identified by date of publication, edition number, version number, etc.) or non-specific. g404 For a specific r
29、eference, subsequent revisions do not apply. g404 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 d
30、ocument. 1 3GPP TR 21.905: “Vocabulary for 3GPP Specifications“. 2 3GPP TS 25.410: “UTRAN Iu interface: General Aspects and Principles“. 3 3GPP TS 25.323: “Packet Data Convergence Protocol (PDCP) specification“. 4 3GPP TS 25.346: “Introduction of the Multimedia Broadcast Multicast Service (MBMS) in
31、the Radio Access Network (RAN); Stage 2“. 5 3GPP TS 36.440: “Evolved Universal Terrestrial Radio Access Network (E-UTRAN); General aspects and principles for interfaces supporting Multimedia Broadcast Multicast Service (MBMS) within E-UTRAN“. 6 3GPP TS 36.300: “Evolved Universal Terrestrial Radio Ac
32、cess Network (E-UTRAN); Overall description“. 3 Definitions and abbreviations 3.1 Definitions For the purposes of the present document, the terms and definitions given in TR 21.905 1 and the following apply. A term defined in the present document takes precedence over the definition of the same term
33、, if any, in TR 21.905 1. RAN Access interface: interface between the Core Network and the Radio Access Network. RAN Access node: termination point of the RAN Access interface at the Radio Access Network. MBMS RAB: denotes the Radio Access data bearer together with the RAN Access Interface data bear
34、er for MBMS service user data transmission. 3.2 Abbreviations For the purposes of the present document, the abbreviations given in TR 21.905 1 and the following apply. An abbreviation defined in the present document takes precedence over the definition of the same abbreviation, if any, in TR 21.905
35、1. MRNC MBMS Master RNC (as specified in TS 25.346 4) SC-PTM Single Cell Point To Multipoint SYNC MBMS synchronisation protocol ETSI ETSI TS 125 446 V15.0.0 (2018-07)73GPP TS 25.446 version 15.0.0 Release 153.4 Specification notations For the purposes of the present document, the following notations
36、 apply: Procedure When referring to a procedure in the specification the Procedure Name is written with the first letters in each word in upper case characters followed by the word “procedure“, e.g. Iu Rate Control procedure. Frame When referring to a control or data frame in the specification, the
37、CONTROL/DATA FRAME NAME is written with all letters in upper case characters followed by the words “control/data frame“, e.g. TIME ALIGNMENT control frame. IE When referring to an information element (IE) in the specification the Information Element Name is written with the first letters in each wor
38、d in upper case characters and all letters in Italic font followed by the abbreviation “IE“, e.g. Frame Number IE. Value of an IE When referring to the value of an information element (IE) in the specification the “Value“ is written as it is specified in subclause 5.6.3 enclosed by quotation marks,
39、e.g. “0“ or “255“. 4 General 4.1 General aspects for the SYNC protocol for UTRAN 4.1.1 General aspects The MBMS Synchronisation protocol (SYNC) is located in the User plane of the Radio Network layer over the Iu interface: the Iu UP protocol layer. The SYNC protocol for UTRAN is used to convey user
40、data associated to MBMS Radio Access Bearers. One SYNC protocol instance is associated to one MBMS RAB and one MBMS RAB only. If several MBMS RABs are established towards one given UE, then these MBMS RABs make use of several SYNC protocol instances. SYNC protocol instances exist at Iu access point
41、as defined (TS 25.410 2) i.e. at CN and UTRAN. Whenever an MBMS RAB requires transfer of user data in the Iu UP, an Iu UP protocol instance exists at each Iu interface access points. These Iu UP protocol instances are established and released together with the associated MBMS RAB. The following figu
42、re illustrates the logical placement of the SYNC protocol layer and the placement of the Data Streams sources outside of the Access Stratum. UTRAN UE CN Access Stratum Non-Access StratumRadio (Uu) Iu SYNC Radio proto- colsSYNC TNL ProtocolTransport Layer NAS Data Streams NAS DataStreams Radio proto-
43、 cols TNL ProtocolFigure 4.1.1-1: SYNC protocol layer occurrence in UTRAN overall architecture (User Plane View) ETSI ETSI TS 125 446 V15.0.0 (2018-07)83GPP TS 25.446 version 15.0.0 Release 154.2 General aspects for the SYNC protocol for E-UTRAN 4.2.1 General aspects The MBMS Synchronisation protoco
44、l (SYNC) is located in the User plane of the Radio Network layer over the M1 interface: the M1 UP protocol layer. The SYNC protocol for E-UTRAN is used to convey user data associated to MBMS Radio Access Bearers. One SYNC protocol instance is associated to one MBMS E-RAB and one MBMS E-RAB only. SYN
45、C protocol instances exist at M1 access point as defined (TS 36.440 5) i.e. at EPC and E-UTRAN. Whenever an MBMS E-RAB requires transfer of user data in the M1 UP, an M1 UP protocol instance exists at each M1 interface access points. These M1 UP protocol instances are established and released togeth
46、er with the associated MBMS E-RAB. The following figure illustrates the logical placement of the SYNC protocol layer and the placement of the Data Streams sources outside of the Access Stratum. E-UTRAN UE CN Access Stratum Non-Access StratumRadio (Uu) M1 SYNC Radio proto- colsSYNC TNL ProtocolTransp
47、ort Layer NAS Data Streams NAS DataStreams Radio proto- cols TNL ProtocolFigure 4.2.1-1: SYNC protocol layer occurrence in E-UTRAN overall architecture (User Plane View) 5 SYNC protocol version 1 5.1 General 5.1.1 Applicablity of SYNC protocol version 1 This version of the specification specifies th
48、e SYNC protocol for UTRAN and E-UTRAN. It is on top of TNL in Iu (UTRAN) and M1 (E-UTRAN) user plane, i.e. Iu userplane TNL transports SYNC protocol PDUs over the Iu interface, M1 userplane TNL transports SYNC protocol PDUs over the M1 interface. As a specification convention, within this specificat
49、ion, the interface between the Core Network and the Radio Access Network is denoted as the “RAN Access Interface”, the termination point at the Radio Access Network is denoted as “RAN Access Node”, the termination point at the Core Network is denoted as “Core Network” (CN). Further, “MBMS RAB” denotes the Radio Access data bearer together with the RAN Access Interface data bearer for MBMS service user data transmission. For the application of the SYNC protocol to UTRAN, the RAN Access Interface is the Iu interface, the RAN Access Node is the RNC.
