1、 ETSI TS 136 458 V14.0.0 (2017-04) Universal Mobile Telecommunications System (UMTS); LTE; Evolved Universal Terrestrial Radio Access Network (E-UTRAN); SLm interface signalling transport (3GPP TS 36.458 version 14.0.0 Release 14) TECHNICAL SPECIFICATION ETSI ETSI TS 136 458 V14.0.0 (2017-04)13GPP T
2、S 36.458 version 14.0.0 Release 14Reference RTS/TSGR-0336458ve00 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 but non lucratif enregistre la Sous-Prfecture de Gra
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9、ned by the GSM Association. ETSI ETSI TS 136 458 V14.0.0 (2017-04)23GPP TS 36.458 version 14.0.0 Release 14Intellectual 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 publi
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12、ay 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 sh
13、ould 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 terminology In the present document “shall“, “shall not“, “should“, “should not“, “m
14、ay“, “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 deliverables except when used in direct citation. ETSI ETSI TS 136 458 V1
15、4.0.0 (2017-04)33GPP TS 36.458 version 14.0.0 Release 14Contents Intellectual Property Rights 2g3Foreword . 2g3Modal verbs terminology 2g3Foreword . 4g31 Scope 5g32 References 5g33 Definitions and abbreviations . 5g33.1 Definitions 5g33.2 Abbreviations . 5g34 SLm signalling bearer 6g34.1 Functions a
16、nd protocol stack 6g35 Data link layer 6g36 IP layer . 6g37 Transport layer . 6g3Annex A (informative): Change History 8g3History 9g3ETSI ETSI TS 136 458 V14.0.0 (2017-04)43GPP TS 36.458 version 14.0.0 Release 14Foreword This Technical Specification has been produced by the 3rdGeneration Partnership
17、 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 i
18、n 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, co
19、rrections, updates, etc. z the third digit is incremented when editorial only changes have been incorporated in the document. ETSI ETSI TS 136 458 V14.0.0 (2017-04)53GPP TS 36.458 version 14.0.0 Release 141 Scope The present document specifies the standards for signalling transport to be used across
20、 the SLm interface. The SLm interface is a logical interface between the LMU and the E-SMLC in the E-UTRAN core network. The present document describes how the SLmAP signalling messages are transported over SLm. 2 References The following documents contain provisions which, through reference in this
21、 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.
22、 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 IETF RFC 2460 (1998-12): “Internet Proto
23、col, Version 6 (IPv6) Specification“. 3 IETF RFC 791(1981-09): “Internet Protocol“. 4 IETF RFC 2474 (1998-12): “Definition of the Differentiated Services Field (DS Field) in the IPv4 and IPv6 Headers“. 5 IETF RFC 4960 (2007-09): “Stream Control Transmission Protocol“. 3 Definitions and abbreviations
24、 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, if any, in TR 21.905 1. SLm: interface between an LMU and an E-SMLC, provid
25、ing an interconnection point between the LMU and the E-SMLC. It is also considered as a reference point. SLmAP: Reference point for the application protocol between LMU and E-SMLC. 3.2 Abbreviations For the purposes of the present document, the following abbreviations apply. E-SMLC E-UTRAN Serving M
26、obile Location Centre DiffServ Differentiated Service IP Internet Protocol MME Mobility Management Entity PPP Point to Point Protocol SCTP Stream Control Transmission Protocol SLmAP SLm Application ProtocolUTDOA Uplink Time Difference of Arrival ETSI ETSI TS 136 458 V14.0.0 (2017-04)63GPP TS 36.458
27、version 14.0.0 Release 144 SLm signalling bearer 4.1 Functions and protocol stack SLm signalling bearer provides the following functions: - Provision of reliable transfer of SLmAP message over SLm interface. - Provision of networking and routeing function - Provision of redundancy in the signalling
28、network - Support for flow control and congestion control The protocol stack for SLm signalling bearer is shown in figure 4.1 and details on each protocol are described in the following clauses. Figure 4.1: SLm signalling bearer protocol stack The transport network layer is based on IP transport, co
29、mprising SCTP on top of IP. 5 Data link layer The support of any suitable data link layer protocol, e.g. PPP, Ethernet, etc. , shall not be prevented. 6 IP layer The LMU and E-SMLC shall support IPv6 (IETF RFC 2460 2) and/or IPv4 (IETF RFC 791 3). The IP layer of SLmAP only supports point-to-point t
30、ransmission for delivering SLmAP messages. The LMU and E-SMLC shall support the Diffserv Code Point marking as described in IETF RFC 2474 4. 7 Transport layer SCTP (IETF RFC 4960 5) shall be supported as the transport layer of SLmAP signalling bearer. The Payload Protocol Identifier assigned by IANA
31、 to be used by SCTP for the application layer protocol SLmAP is TBD. SCTP refers to the Stream Control Transmission Protocol developed by the Sigtran working group of the IETF for the purpose of transporting various signalling protocols over IP network. ETSI ETSI TS 136 458 V14.0.0 (2017-04)73GPP TS
32、 36.458 version 14.0.0 Release 14There shall be only one SCTP association established between one E-SMLC and LMU pair. The LMU shall establish the SCTP association. The SCTP Destination Port number value assigned by IANA to be used for SLmAP is TBD. Within the SCTP association established between on
33、e E-SMLC and LMU pair: - a single pair of stream identifiers shall be reserved for the sole use of SLmAP elementary procedures that utilize non UE-associated signalling. - At least one pair of stream identifiers shall be reserved for the sole use of SLmAP elementary procedures that utilize UE-associ
34、ated signalling. However, a few pairs (i.e. more than one) should be reserved. - A single UE-associated signalling shall use one SCTP stream and the stream should not be changed during the communication of the UE-associated signalling. Transport network redundancy may be achieved by SCTP multi-homin
35、g between two end-points, of which one or both is assigned with multiple IP addresses. SCTP end-points shall support a multi-homed remote SCTP end-point. For SCTP endpoint redundancy an INIT may be sent from E-SMLC, at any time for an already established SCTP association, which shall be handled as d
36、efined in IETF RFC 4960 5 in subclause 5.2. The SCTP congestion control may, using an implementation specific mechanism, initiate higher layer protocols to reduce the signalling traffic at the source and prioritise certain messages. ETSI ETSI TS 136 458 V14.0.0 (2017-04)83GPP TS 36.458 version 14.0.
37、0 Release 14Annex A (informative): Change History Change history Date TSG # TSG Doc. CR Rev Subject/Comment New 2012-12 58 RP-121768 Approved in RAN#58 and put under change control 11.0.0 2014-09 Update to Rel-12 version (MCC) 12.0.0 2015-12 Update to Rel-13 version (MCC) 13.0.0 Change history Date Meeting TDoc CR Rev Cat Subject/Comment New version 2017-03 SA#75 Promotion to Release 14 without technical change 14.0.0 ETSI ETSI TS 136 458 V14.0.0 (2017-04)93GPP TS 36.458 version 14.0.0 Release 14History Document history V14.0.0 April 2017 Publication
