1、 ETSI TS 136 464 V14.0.0 (2017-04) LTE; Evolved Universal Terrestrial Radio Access Network (E-UTRAN) and Wireless LAN (WLAN); Xw data transport (3GPP TS 36.464 version 14.0.0 Release 14) TECHNICAL SPECIFICATION ETSI ETSI TS 136 464 V14.0.0 (2017-04)13GPP TS 36.464 version 14.0.0 Release 14Reference
2、RTS/TSGR-0336464ve00 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 present d
3、ocument can be downloaded from: http:/www.etsi.org/standards-search The present document may be made available in electronic versions and/or in print. The content of any electronic and/or print versions of the present document shall not be modified without the prior written authorization of ETSI. In
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7、odified without the written authorization of ETSI. The copyright and the foregoing restriction extend to reproduction in all media. European Telecommunications Standards Institute 2017. All rights reserved. DECTTM, PLUGTESTSTM, UMTSTMand the ETSI logo are Trade Marks of ETSI registered for the benef
8、it of its Members. 3GPPTM and LTE are Trade Marks of ETSI registered for the benefit of its Members and of the 3GPP Organizational Partners. oneM2M logo is protected for the benefit of its Members GSM and the GSM logo are Trade Marks registered and owned by the GSM Association. ETSI ETSI TS 136 464
9、V14.0.0 (2017-04)23GPP TS 36.464 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-members, a
10、nd 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 to th
11、e 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. For
12、eword 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 co
13、rresponding 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“ and “c
14、annot“ 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 136 464 V14.0.0 (2017-04)33GPP TS 36.464 version 14.0.0 Rel
15、ease 14Contents Intellectual Property Rights 2g3Foreword . 2g3Modal verbs terminology 2g3Foreword . 4g31 Scope 5g32 References 5g33 Definitions and abbreviations . 5g33.1 Definitions 5g33.2 Abbreviations . 5g34 Data link layer 6g35 Xw interface user plane protocol 6g35.1 General . 6g35.2 GTP-U 6g35.
16、3 UDP/IP . 6g35.4 Diffserv code point marking . 7g35.5 LTE-WLAN Aggregation 7g35.6 LTE WLAN Radio Level Integration with IPsec Tunnel . 7g3Annex A (informative): Change history . 9g3History 10g3ETSI ETSI TS 136 464 V14.0.0 (2017-04)43GPP TS 36.464 version 14.0.0 Release 14Foreword This Technical Spe
17、cification has been produced by the 3rdGeneration 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
18、 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
19、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 ETSI TS 136 464 V14.0.0 (2017-04)53GPP TS 36.464 version 14.0.0 Release 141 Scope The present document speci
20、fies the standards for user data transport protocols and related signalling protocols to establish user plane transport bearers over the Xw interface for LTE/WLAN Aggregation (LWA) and enhanced LTE WLAN Radio Level Integration with IPsec Tunnel (eLWIP). 2 References The following documents contain p
21、rovisions 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-speci
22、fic 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”.
23、2 3GPP TS 36.300: “Evolved Universal Terrestrial Radio Access (E-UTRA) and Evolved Universal Terrestrial Radio Access Network (E-UTRAN); Overall description; Stage 2”. 3 3GPP TS 36.465: “Evolved Universal Terrestrial Radio Access Network (E-UTRAN) and Wireless LAN (WLAN); Xw interface user plane pro
24、tocol”. 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. A term defined in the present document takes precedence over the definition of the same term, if any, in 3GPP TR 21.905 1. LT
25、E-WLAN Aggregation: Defined in TS 36.300 2. LWA bearer: Defined in TS 36.300 2. LWIP bearer: Defined in TS 36.300 2. LWIP Operation: Defined in TS 36.300 2. Xw: logical interface between eNB and WT. WLAN Termination: Defined in TS 36.300 2. 3.2 Abbreviations For the purposes of the present document,
26、 the abbreviations 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. eNB E-UTRAN Node LWA LTE-WLAN Aggregation LWIP LTE WLAN Radio Level Integration with IPsec
27、 Tunnel WT WLAN Termination ETSI ETSI TS 136 464 V14.0.0 (2017-04)63GPP TS 36.464 version 14.0.0 Release 144 Data link layer Any data link protocol that fulfils the requirements toward the upper layer may be used. 5 Xw interface user plane protocol 5.1 General The transport layer for data streams ov
28、er Xw is an IP based Transport. The following figure shows the transport protocol stacks over Xw. GTP-U UDP IPv6 (RFC 2460) and/or IPv4 (RFC 791) Data link layer Physical layer Figure 5.1: Transport network layer for data streams over Xw The GTP-U (TS 29.281 2) protocol over UDP over IP shall be sup
29、ported as the transport for data streams on the Xw interface. The data link layer is as specified in clause 4. For LWA bearers, there may be one UL data stream and there may be one DL data stream per E-RAB at the Xw interface. For LWIP bearers, there may be one UL data stream and there may be one DL
30、 data stream per UE at the Xw interface. - The DL data stream is used for DL user data forwarding from the eNB to the WT. - The UL data stream is used for carrying the UL flow control feedback (if flow control is supported) and for UL user data forwarding from the WT to the eNB. Each data stream is
31、carried on a dedicated transport bearer. If supported, the WT may use the DRB Identifier in the LWA PDU header of the UL data stream to identify the dedicated UL transport bearer. The identity of a transport bearer signalled in the RNL control plane consists of the IP address and the TEID of the cor
32、responding GTP tunnel, allocated by the target node (see TS 29.281 2). 5.2 GTP-U The GTP-U (TS 29.281 2) protocol shall be used over the Xw interface between eNB and WT. 5.3 UDP/IP The path protocol used shall be UDP (IETF RFC 768 3). The UDP port number for GTP-U shall be as defined in TS 29.281 2.
33、 The eNB and the WT over the Xw interface shall support fragmentation and assembly of GTP packets at the IP layer. ETSI ETSI TS 136 464 V14.0.0 (2017-04)73GPP TS 36.464 version 14.0.0 Release 14The eNB and the WT shall support IPv6 (IETF RFC 2460 5) and/or Ipv4 (IETF RFC 791 6). LWA: There may be on
34、e or several IP addresses in both the eNB and the WT. The packet processing function in the source eNB shall send downstream packets corresponding toa given E-RAB to the target WT IP address (received in XwAP) associated to the DL transport bearer of that particular E-RAB. The packet processing func
35、tion in the source WT shall send upstream packets corresponding to a given E-RAB to the target eNB IP address (received in XwAP) associated to the UL transport bearer of that particular E-RAB or the E-RAB with the lowest E-RAB ID. LWIP: There may be one or several IP addresses in both the eNB and th
36、e LWIP-SeGW. The packet processing function in the source eNB shall send downstream packets corresponding to a given LWIP bearer to the target LWIP-SeGW IP address (received in XwAP) associated to the DL transport bearer of that particular GTP-U TEID. The packet processing function in the source LWI
37、P-SeGW shall send upstream packets corresponding to a given UE to the target eNB IP address (received in XwAP) associated to the UL transport bearer of that particular GTP-U TEID. The Transport Layer Address signalled in XwAP messages is a bit string of either a) 32 bits in case of Ipv4 address acco
38、rding to IETF RFC 791 6; or b) 128 bits in case of Ipv6 address according to IETF RFC 2460 5. 5.4 Diffserv code point marking IP Differentiated Services code point marking (IETF RFC 2474 4) shall be supported. The mapping between traffic categories and Diffserv code points shall be configurable by O
39、&M for based on QoS Class Identifier (QCI)/ Label Characteristics and others E-UTRAN traffic parameters. Traffic categories are implementation-specific and may be determined from the application parameters. 5.5 LTE-WLAN Aggregation For the LWA bearer option - the GTP-U (TS 29.281 2) protocol over UD
40、P over IP shall be supported as the transport for the downlink and uplink user data streams of LWA PDUs and the uplink flow control feedback stream on the Xw interface. The GTP-U PDU includes a RAN Container with flow control information as specified in TS 36.465 3 which is carried in the GTP-U exte
41、nsion header. The transport bearer is identified by the GTP-U TEID (TS 29.281 2) and the IP address of the eNB and WT respectively. There is one UL data stream and there is one DL data stream per E-RAB at the Xw interface: - The DL data stream is used for DL user data transmission from the eNB to th
42、e WT. - The UL data stream is used for UL user data transmission and UL flow control feedback transmission from the WT to the eNB. - the packet processing function in the eNB shall send downstream packets corresponding to a given E-RAB to the WT IP address (received in XwAP) associated to the DL tra
43、nsport bearer of that particular E-RAB. The packet processing function in the WT shall send upstream packets corresponding to a given E-RAB to the eNB IP address (received in XwAP) associated to the UL transport bearer of that particular E-RAB or the E-RAB with the lowest E-RAB ID. - in addition, us
44、er data forwarding (from WT to eNB ) may be performed by eNB providing another GTP-U TEID to receive the DL data forwarded by the WT. 5.6 LTE WLAN Radio Level Integration with IPsec Tunnel For the LWIP bearer option - the GTP-U (TS 29.281 2) protocol over UDP over IP shall be supported as the transp
45、ort for the downlink and uplink user data streams of LWIP PDUs and the uplink flow control feedback stream on the Xw interface. The ETSI ETSI TS 136 464 V14.0.0 (2017-04)83GPP TS 36.464 version 14.0.0 Release 14GTP-U PDU includes a RAN Container with flow control information as specified in TS 36.46
46、5 3 which is carried in the GTP-U extension header. The transport bearer is identified by the GTP-U TEID (TS 29.281 2) and the IP address of the eNB and LWIP-SeGW respectively. There is one UL data stream and there is one DL data stream per UE at the Xw interface: - The DL data stream is used for DL
47、 user data transmission from the eNB to the LWIP-SeGW. - The UL data stream is used for UL user data transmission and UL flow control feedback transmission from the LWIP-SeGW to the eNB. - the packet processing function in the eNB shall send downstream packets corresponding to all LWIP bearers to th
48、e LWIP-SeGW IP address (received in XwAP) associated to the DL transport bearer of that particular GTP-U TEID. The packet processing function in the LWIP-SeGW shall send upstream packets corresponding to all LWIP bearers to the eNB IP address (received in XwAP) associated to the UL transport bearer
49、of that particular GTP-U TEID. ETSI ETSI TS 136 464 V14.0.0 (2017-04)93GPP TS 36.464 version 14.0.0 Release 14Annex A (informative): Change history Change history Date TSG # TSG Doc. CR Rev Cat Subject/Comment New 2015-08 RAN3#89 R3-151596 Draft skeleton TR 0.0.1 2015-09 RAN3#89-bis R3-152213 TR number update 0.0.2 2015-11 RAN3#90 R3-152419 TR number update 0.1.0 2015-11 RAN3#90 R3-152906 Agreements from RAN3#90 0.2.0 2016-01 RAN3#AH R3-160006 TR number update 1.1.0 2016-02 RAN3#AH R3-160149 Agreements from RAN3#AH
