1、 ETSI TS 136 462 V14.0.0 (2017-04) LTE; Evolved Universal Terrestrial Radio Access Network (E-UTRAN) and Wireless LAN (WLAN); Xw signalling transport (3GPP TS 36.462 version 14.0.0 Release 14) TECHNICAL SPECIFICATION ETSI ETSI TS 136 462 V14.0.0 (2017-04)13GPP TS 36.462 version 14.0.0 Release 14Refe
2、rence RTS/TSGR-0336462ve00 Keywords LTE 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 pre
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9、6 462 V14.0.0 (2017-04)23GPP TS 36.462 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 publicly available for ETSI members and non-memb
10、ers, 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 (https:/ipr.etsi.org/). Pursuant
11、 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 documen
12、t. 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
13、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“, “may“, “need not“, “will“, “will not“, “can“
14、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 136 462 V14.0.0 (2017-04)33GPP TS 36.462 version 14.0
15、.0 Release 14Contents Intellectual Property Rights 2g3Foreword . 2g3Modal verbs terminology 2g3Foreword . 4g31 Scope 5g32 References 5g33 Definitions, symbols and abbreviations . 5g33.1 Definitions 5g33.2 Abbreviations . 5g34 Xw signalling bearer 6g34.1 Function and protocol stack 6g35 Data link lay
16、er 6g36 IP layer . 6g37 Transport layer . 6g3Annex A (informative): Change history . 8g3History 9g3ETSI ETSI TS 136 462 V14.0.0 (2017-04)43GPP TS 36.462 version 14.0.0 Release 14Foreword This Technical Specification has been produced by the 3rdGeneration Partnership Project (3GPP). The contents of t
17、he 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: Versi
18、on 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 thi
19、rd digit is incremented when editorial only changes have been incorporated in the document. ETSI ETSI TS 136 462 V14.0.0 (2017-04)53GPP TS 36.462 version 14.0.0 Release 141 Scope The present document specifies the standards for Signalling Transport to be used across the Xw interface. The Xw interfac
20、e is a logical interface between the eNB and the WT. The present document describes how the Xw-AP signalling messages are transported over Xw. 2 References The following documents contain provisions which, through reference in this text, constitute provisions of the present document. - References ar
21、e 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 docum
22、ent), 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 Protocol, Version 6 (Ipv6) Specification“. 3 IETF RFC 791(1981-09): “Inter
23、net 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, symbols and abbreviations 3.1 Definitions For the purposes of the present document, t
24、he 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. Xw: logical interface between eNB and WT. 3.2 Abbreviations For the purposes of the present document, the abbre
25、viations given in 3GPP 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 3GPP TR 21.905 1. IANA Internet Assigned Numbers Authority IETF Internet Engineering Task Force PPP Point-to-Point Pro
26、tocol RFC Request for CommentsSCTP Stream Control Transmission Protocol WT WLAN Termination ETSI ETSI TS 136 462 V14.0.0 (2017-04)63GPP TS 36.462 version 14.0.0 Release 144 Xw signalling bearer 4.1 Function and protocol stack Xw signalling bearer provides the following functions: - Provision of reli
27、able transfer of Xw-AP message over Xw interface. - Provision of networking and routeing function; - Provision of redundancy in the signalling network; - Support for flow control and congestion control. The protocol stack for Xw Signalling Bearer is shown in figure 4.1-1 and details on each protocol
28、 are described in the following sections. SCTP IP Data link layer Xw-AP Physical layer Radio Network Layer TransportNetworkLayer Figure 4.1-1: Xw signalling bearer protocol stack The Transport Network Layer is based on IP transport, comprising SCTP on top of IP. 5 Data link layer The support of any
29、suitable Data Link Layer protocol, e.g. PPP, Ethernet, etc., shall not be prevented. 6 IP layer The eNB shall support Ipv6 (IETF RFC 2460 2) and/or Ipv4 (IETF RFC 791 3). The IP layer of Xw only supports point-to-point transmission for delivering Xw-AP message. The eNB shall support the Diffserv Cod
30、e 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 Xw signalling bearer. The Payload Protocol Identifier assigned by IANA to be used by SCTP for the application layer protocol XwAP is 59. SCTP refers to the Stream Co
31、ntrol 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 136 462 V14.0.0 (2017-04)73GPP TS 36.462 version 14.0.0 Release 14There shall be only one SCTP association established between one
32、 eNB and WT pair. The eNB shall establish the SCTP association. The SCTP Destination Port Number value assigned by IANA to be used for XwAP is 36462. Within the SCTP association established between an eNB and WT pair; - A single pair of stream identifiers shall be reserved for the sole use of XwAP e
33、lementary procedures that utilize non UE-associated signalling. - At least one pair of stream identifiers shall be reserved for the sole use of XwAP elementary procedures that utilize UE-associated signalling. However a few pairs (i.e. more than one) should be reserved. - A single UE-associated sign
34、alling 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-homing between two endpoints, of which one or both is assigned with multiple IP addresses. SCTP endpoints shall s
35、upport a multi-homed remote SCTP endpoint. For SCTP endpoint redundancy an INIT may be sent from WT or eNB, at any time for an already established SCTP association, which shall be handled as defined in IETF RFC 4960 5 in sub-clause 5.2. The SCTP congestion control may, using an implementation specif
36、ic mechanism, initiate higher layer protocols to reduce the signalling traffic at the source and prioritise certain messages. ETSI ETSI TS 136 462 V14.0.0 (2017-04)83GPP TS 36.462 version 14.0.0 Release 14Annex A (informative): Change history Change history Date Meeting TDoc CR Rev Cat Subject/Comme
37、nt New version 2015-10 RAN3#89bis R3-152078 Xw signaling support 0.1.0 2015-10 RAN3#89bis R3-152246 Xw_signaling support 0.1.0 2015-10 RAN3#89bis R3-152247 Draft_TS36462_Update 0.1.0 2015-11 RAN3#90 R3-152417 Draft_TS36462_Update 0.2.0 2015-11 RAN3#90 R3-152774 Draft_TS36462_Update 0.3.0 2015-11 RAN
38、#70 RP-151865 Presentation Specification to TSG RAN#70 1.0.0 2016-01 RAN3# Adhoc NB-IOT R3-160004 Editorial update: change “Xw signaling support” to “Xw signaling transport” 1.1.0 2016-01 RAN3# Adhoc NB-IOT R3-160123 Cover page update 1.2.0 2016-02 RAN3#91 R3-160155 Version update 1.3.0 2016-03 RAN#
39、71 RP-160518 MCC clean up and version update 2.0.0 2016-03 RAN#71 Upgraded to Rel-13 and placed under change control 13.0.0 2017-03 SA#75 Promotion to Release 14 without technical change 14.0.0 ETSI ETSI TS 136 462 V14.0.0 (2017-04)93GPP TS 36.462 version 14.0.0 Release 14History Document history V14.0.0 April 2017 Publication
