1、 ETSI TS 123 261 V14.0.0 (2017-05) Universal Mobile Telecommunications System (UMTS); LTE; IP flow mobility and seamless Wireless Local Area Network (WLAN) offload; Stage 2 (3GPP TS 23.261 version 14.0.0 Release 14) TECHNICAL SPECIFICATION ETSI ETSI TS 123 261 V14.0.0 (2017-05)13GPP TS 23.261 versio
2、n 14.0.0 Release 14Reference RTS/TSGS-0223261ve00 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 Grasse (06) N 7803
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9、Association. ETSI ETSI TS 123 261 V14.0.0 (2017-05)23GPP TS 23.261 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 f
10、or ETSI members and non-members, 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 (htt
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12、ntial 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 should be interpr
13、eted 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“, “may“, “need not“
14、, “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 123 261 V14.0.0 (2017-05)
15、33GPP TS 23.261 version 14.0.0 Release 14Contents Intellectual Property Rights 2g3Foreword . 2g3Modal verbs terminology 2g3Foreword . 4g31 Scope 5g32 References 5g33 Definitions and abbreviations . 6g33.1 Definitions 6g33.2 Abbreviations . 6g34 Architecture model and concepts . 6g34.1 General concep
16、ts 6g34.2 Architecture reference model . 7g34.2.1 Non-roaming architecture . 7g34.2.1 Roaming architecture 7g34.3 High level functions . 7g34.3.1 S2c and H1 extensions for IP flow mobility . 7g34.3.1.1 General 7g34.3.1.2 DSMIPv6 enhancements . 7g34.3.2 Policy provisioning for Inter-system mobility a
17、nd WLAN offload 8g34.3.3 Policy Control and Charging support . 9g34.3.4 Local Operating Environment Information . 9g35 IP Flow Mobility procedures and flows . 9g35.1 General . 9g35.2 PDN connection establishment over first access 9g35.2.1 General 9g35.2.2 PDN connection establishment over 3GPP acces
18、s 9g35.2.3 PDN connection establishment over WLAN 10g35.3 Addition of an access to a PDN connection . 11g35.3.1 General 11g35.3.2 Addition of WLAN access 12g35.3.3 Addition of 3GPP access 13g35.4 IP flow mobility within a PDN connection 15g35.4.1 General 15g35.4.2 IP flow mobility within a PDN conne
19、ction with network-initiated dynamic PCC . 15g35.4.3 IP flow mobility within a PDN connection with UE-initiated resource request . 16g35.5 Removal of an access from a PDN connection 18g35.5.1 UE-initiated removal of an access from a PDN connection 18g35.5.2 HA-initiated removal of an access from a P
20、DN connection . 19g35.6 Addition of one access for multiple PDN connections to the same APN . 21g35.7 Detach and PDN disconnection procedures . 21g3Annex A (informative): Change history . 22g3History 23g3ETSI ETSI TS 123 261 V14.0.0 (2017-05)43GPP TS 23.261 version 14.0.0 Release 14Foreword This Tec
21、hnical Specification 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
22、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 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 in
23、cremented 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 123 261 V14.0.0 (2017-05)53GPP TS 23.261 version 14.0.0 Release 141 Scope This document sp
24、ecifies the Stage 2 system description for IP flow mobility between a 3GPP and a WLAN. The technical solution is based on the working principles of DSMIPv6 2 and it is applicable to both the Evolved Packet System and the I-WLAN mobility architecture. The specification covers the system description o
25、f seamless WLAN offload and IP flow mobility between 3GPP and WLAN as well as the respective interactions with the PCC and ANDSF frameworks. The system description for non seamless WLAN offload is covered in 3GPP TS 23.402 3. This document specifies also the detailed extensions to S2c 3 and H1 4 ref
26、erence points for IP flow mobility. The extensions to the PCC and to the ANDSF framework are specified respectively in 3GPP TS 23.203 5 and in 3GPP TS 23.402 3. 2 References The following documents contain provisions which, through reference in this text, constitute provisions of the present documen
27、t. - 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. In the case of a reference to a 3GPP document (inc
28、luding 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 5555 (June 2009): “Mobile IPv6 support for dual stack Hosts and Routers (DSMIPv6)“
29、. 3 3GPP TS 23.402: “Architecture enhancements for non-3GPP accesses“. 4 3GPP TS 23.327: “Mobility between 3GPP-Wireless Local Area Network (WLAN) interworking and 3GPP systems“. 5 3GPP TS 23.203: “Policy and Charging Control architecture“. 6 IETF RFC 4877 (April 2007): “Mobile IPv6 Operation with I
30、KEv2 and the Revised IPsec Architecture“. 7 IETF RFC 5648 (October 2009): “Multiple Care-of Addresses Registration“. 8 IETF RFC 6089 (January 2011): “Flow Bindings in Mobile IPv6 and Network Mobility (NEMO) Basic Support“. 9 3GPP TS 23.234: “3GPP System to Wireless Local Area Network (WLAN) Interwor
31、king; System Description“. 10 3GPP TS 23.401: “General Packet Radio Service (GPRS) enhancements for Evolved Universal Terrestrial Radio Access Network (E-UTRAN) access“. 11 3GPP TS 23.060: “General Packet Radio Service (GPRS); Service description; Stage 2“. 12 IETF RFC 6088 (January 2011): “Traffic
32、Selectors for Flow Bindings“. 13 IETF RFC 5846 (June 2010): “Binding Revocation for IPv6 Mobility“. 14 IETF RFC 6275 (July 2011): “Mobility Support in IPv6“. ETSI ETSI TS 123 261 V14.0.0 (2017-05)63GPP TS 23.261 version 14.0.0 Release 143 Definitions and abbreviations 3.1 Definitions For the purpose
33、s of the present document, the terms and definitions given in TR 21.905 1 and the following apply. The following terms used in this Technical Specification are defined in RFC 6275 14: Home Address, Care-of Address, binding cache, binding cache entry. The following terms used in this Technical Specif
34、ication are defined in TS 23.402 3: Home network prefix. Home Agent: The Home Agent functionality consists in the DSMIPv6 anchor point functionality described in RFC 5555 2 and in RFC 4877 6 and the extensions defined in RFC 5648 7 and RFC 6089 8. As per TS 23.402 3, the HA functionality is located
35、in the PDN Gateway. As per TS 23.327 4 the HA functionality can be either a standalone entity or co-located with the GGSN or with the PDG. Local Operating Environment Information: This is a set of implementation specific parameters which describe the local environment in which the UE is operating. r
36、outing address: A routable IP address. In DSMIPv6 this is either the CoA (visited link case) or the HoA (in home link case). routing filter: A set of packet flow IP header parameter values/ranges used to identify one or more IP flows for routing purposes. routing rule: The association of a routing f
37、ilter with a routing address. 3.2 Abbreviations For the purposes of the present document, the abbreviations given in TR 21.905 1 and the following apply. BID Binding Identifier CoA Care-of AddressDSMIPv6 Dual-Stack Mobile IPv6 EPC Evolved Packet Core ePDG Evolved Packet Data Gateway EPS Evolved Pack
38、et System FID Flow Identifier GW GatewayHA Home Agent HoA Home AddressUE User Equipment 4 Architecture model and concepts 4.1 General concepts This document specifies a mechanism for a UE to simultaneously connect to 3GPP access and WLAN and exchange different IP flows belonging to the same PDN conn
39、ection through different accesses. The mechanism also enables seamless IP flow mobility, with IP flows belonging to the same or different applications being moved seamlessly between a 3GPP access and WLAN. The solution allows the operator to indicate how the IP flows are routed through the available
40、 access systems and to selectively offload some traffic (e.g. best effort traffic) to WLAN while using UTRAN or E-UTRAN for other traffic (e.g. traffic with specific QoS requirements). This is usually referred to as WLAN offload. ETSI ETSI TS 123 261 V14.0.0 (2017-05)73GPP TS 23.261 version 14.0.0 R
41、elease 14The technical solution is based on DSMIPv6, RFC 5555 2 and is applicable to both the Evolved Packet System and the I-WLAN mobility architecture. Since the solution is based on DSMIPv6, IP address preservation and session continuity is provided when moving IP flows from one access to the oth
42、er. 4.2 Architecture reference model 4.2.1 Non-roaming architecture The baseline architecture reference model for IP flow mobility when EPS is deployed in the non roaming case is specified in TS 23.402 3. The baseline architecture reference model for IP flow mobility when I-WLAN mobility is deployed
43、 in the non roaming case is specified in TS 23.327 4. The baseline Non-roaming architecture for I-WLAN is specified in TS 23.234 9. The baseline Non-roaming architecture for ANDSF is specified in TS 23.402 3. 4.2.1 Roaming architecture The baseline architecture reference model for IP flow mobility w
44、hen EPS is deployed in the roaming case is specified in TS 23.402 3. The baseline architecture reference model for IP flow mobility when I-WLAN mobility is deployed in the roaming case is specified in TS 23.327 4. The baseline roaming architecture for I-WLAN is specified in TS 23.234 9. The baseline
45、 roaming architecture for ANDSF is specified in TS 23.402 3. 4.3 High level functions 4.3.1 S2c and H1 extensions for IP flow mobility 4.3.1.1 General The granularity of access system connectivity and inter system mobility based on TS 23.402 3 and TS 23.327 4 is per PDN connection basis. This implie
46、s that when a handover occurs all the IP flows belonging to the same PDN connection are moved from the source access system to the target access system. With IP flow mobility it is possible to have a finer granularity in access system connectivity and inter system mobility: the handover procedures c
47、an be applied to a single or multiple IP flows belonging to the same PDN connection. This implies that some IP flows of one PDN connection can be routed via one access system while simultaneously some IP flows of the same PDN connection can be routed via another access system. To achieve IP flow mob
48、ility the inter-system mobility signalling is enhanced in order to carry routing filters. The extensions to DSMIPv6 mobility signalling needed to carry routing filters when the UE is connected to multiple accesses simultaneously are specified in RFC 5648 7 and RFC 6089 8 and are applicable to both S
49、2c and H1. 4.3.1.2 DSMIPv6 enhancements When a UE configures different IP addresses on multiple accesses, it can register these addresses with the HA as CoAs using multiple bindings as specified in IETF RFC 5648 7. To register multiple bindings, the UE generates a Binding ID (BID) for each CoA and stores the BID in the binding update list. The UE then registers its CoAs by sending a Binding Update (BU) with a Binding Identifier mobility option. The BID is included in the Binding Identifier
