1、 ETSI TS 136 464 V15.0.0 (2018-07) LTE; Evolved Universal Terrestrial Radio Access Network (E-UTRAN) and Wireless Local Area Network (WLAN); Xw data transport (3GPP TS 36.464 version 15.0.0 Release 15) TECHNICAL SPECIFICATION ETSI ETSI TS 136 464 V15.0.0 (2018-07)13GPP TS 36.464 version 15.0.0 Relea
2、se 15Reference RTS/TSGR-0336464vf00 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 notic
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9、64 version 15.0.0 Release 15Intellectual Property Rights Essential patents IPRs essential or potentially essential to normative deliverables 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
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15、eryform.asp. Modal verbs terminology 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
16、 “must not“ are NOT allowed in ETSI deliverables except when used in direct citation. ETSI ETSI TS 136 464 V15.0.0 (2018-07)33GPP TS 36.464 version 15.0.0 Release 15Contents Intellectual Property Rights 2g3Foreword . 2g3Modal verbs terminology 2g3Foreword . 4g31 Scope 5g32 References 5g33 Definition
17、s 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 6g35.3 UDP/IP . 6g35.4 Diffserv code point marking . 7g35.5 LTE-WLAN Aggregation 7g35.6 LTE WLAN Radio Level Integration with IPsec Tunnel . 7g3Ann
18、ex A (informative): Change history . 9g3History 10g3ETSI ETSI TS 136 464 V15.0.0 (2018-07)43GPP TS 36.464 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 subject to continuing w
19、ork 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
20、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 cha
21、nges have been incorporated in the document. ETSI ETSI TS 136 464 V15.0.0 (2018-07)53GPP TS 36.464 version 15.0.0 Release 151 Scope The present document specifies the standards for user data transport protocols and related signalling protocols to establish user plane transport bearers over the Xw in
22、terface for LTE/WLAN Aggregation (LWA) and enhanced LTE WLAN Radio Level Integration with IPsec Tunnel (eLWIP). 2 References The following documents contain provisions which, through reference in this text, constitute provisions of the present document. - References are either specific (identified b
23、y 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
24、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 36.300: “Evolved Universal Terrestrial Radio Access (E-UTRA) and Evolved Universal Terrestrial Radio Access Network (E-UTRAN); Overa
25、ll description; Stage 2”. 3 3GPP TS 36.465: “Evolved Universal Terrestrial Radio Access Network (E-UTRAN) and Wireless LAN (WLAN); Xw interface user plane protocol”. 3 Definitions and abbreviations 3.1 Definitions For the purposes of the present document, the terms and definitions given in 3GPP TR 2
26、1.905 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. LTE-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 i
27、n 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, the abbreviations given in 3GPP TR 21.905 1 and the following apply. An abbreviation defined in the present document takes precedence over th
28、e 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 Tunnel WT WLAN Termination ETSI ETSI TS 136 464 V15.0.0 (2018-07)63GPP TS 36.464 version 15.0.0 Release 154 Data link layer Any data link pro
29、tocol 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 over 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 7
30、91) 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 supported 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 o
31、ne 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 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
32、 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 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 identi
33、fy 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 corresponding 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 in
34、terface 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. The eNB and the WT over the Xw interface shall support fragmentation and assembly of GTP packets at the IP layer. The eNB and the WT shall su
35、pport IPv6 (IETF RFC 2460 5) and/or Ipv4 (IETF RFC 791 6). LWA: ETSI ETSI TS 136 464 V15.0.0 (2018-07)73GPP TS 36.464 version 15.0.0 Release 15There may be one or several IP addresses in both the eNB and the WT. The packet processing function in the source eNB shall send downstream packets correspon
36、ding 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 function 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
37、 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 the LWIP-SeGW. The packet processing function in the source eNB shall send downstream packets corresponding to a given LWIP bearer to the target
38、 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 LWIP-SeGW shall send upstream packets corresponding to a given UE to the target eNB IP address (received in XwAP) associated to the UL transport
39、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 according 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 Differentiate
40、d 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&M for based on QoS Class Identifier (QCI)/ Label Characteristics and others E-UTRAN traffic parameters. Traffic categories are implementation
41、-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 UDP 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 s
42、tream on the Xw interface. The GTP-U PDU may include a Xw RAN Container with flow control information as specified in TS 36.465 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 WT respectively. Ther
43、e 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 the 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
44、 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 transport bearer of that particular E-RAB. The packet processing function in the WT shall send upstream packets corresponding to a given E-
45、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, user 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.
46、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 transport for the downlink and uplink user data streams of LWIP PDUs and the uplink flow control feedback stream on the Xw interface. The GTP-
47、U PDU includes a Xw RAN Container with flow control information as specified in TS 36.465 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 the
48、re is one DL data stream per UE at the Xw interface: - The DL data stream is used for DL user data transmission from the eNB to the LWIP-SeGW. ETSI ETSI TS 136 464 V15.0.0 (2018-07)83GPP TS 36.464 version 15.0.0 Release 15- The UL data stream is used for UL user data transmission and UL flow control
49、 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 the 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 of that particular GTP-U TEID. ETSI ETSI TS 136 464 V15.0.0
