ETSI TS 124 139 V11.5.0 (2018-12)

Universal Mobile Telecommunications System (UMTS); LTE; 3GPP system - fixed broadband access network interworking; Stage 3 (3GPP TS 24.139 version 11.5.0 Release 11)

ETSI TS 124 139 V11.5.0 (2018-12)

Name:ETSI TS 124 139 V11.5.0 (2018-12)   Standard name:Universal Mobile Telecommunications System (UMTS); LTE; 3GPP system - fixed broadband access network interworking; Stage 3 (3GPP TS 24.139 version 11.5.0 Release 11)
Standard number:ETSI TS 124 139 V11.5.0 (2018-12)   language:English language
Release Date:20-Dec-2018   technical committee:3GPP CT 1 - MM/CC/SM [lu] (formely CN1)
Drafting committee:   ICS number:
ETSI TS 124 139 V11.5.0 (2018-12)






TECHNICAL SPECIFICATION
Universal Mobile Telecommunications System (UMTS);
LTE;
3GPP system - fixed broadband access network interworking;
Stage 3
(3GPP TS 24.139 version 11.5.0 Release 11)

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3GPP TS 24.139 version 11.5.0 Release 11 1 ETSI TS 124 139 V11.5.0 (2018-12)



Reference
RTS/TSGC-0124139vb50
Keywords
LTE,UMTS
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ETSI

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3GPP TS 24.139 version 11.5.0 Release 11 2 ETSI TS 124 139 V11.5.0 (2018-12)
Intellectual 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 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 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 document.
Trademarks
The present document may include trademarks and/or tradenames which are asserted and/or registered by their owners.
ETSI claims no ownership of these except for any which are indicated as being the property of ETSI, and conveys no
right to use or reproduce any trademark and/or tradename. Mention of those trademarks in the present document does
not constitute an endorsement by ETSI of products, services or organizations associated with those trademarks.
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 the corresponding ETSI deliverables.
The cross reference between GSM, UMTS, 3GPP and ETSI identities can be found under
.
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 "must not" are NOT allowed in ETSI deliverables except when used in direct citation.
ETSI

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3GPP TS 24.139 version 11.5.0 Release 11 3 ETSI TS 124 139 V11.5.0 (2018-12)
Contents
Intellectual Property Rights . 2
Foreword . 2
Modal verbs terminology . 2
Foreword . 5
1 Scope . 6
2 References . 6
3 Definitions and abbreviations . 7
3.1 Definitions . 7
3.2 Abbreviations . 7
4 General . 7
4.1 Support of Fixed Broadband Access Network Interworking . 7
4.2 Network Discovery and Selection . 7
4.2.1 Access network discovery and selection procedures . 7
4.2.2 EPC network selection . 8
4.2.3 Access network reselection . 8
4.2.4 Data traffic routing of IP flows . 8
4.3 UE – EPC Network Protocols . 8
4.3.1 Trusted and Untrusted Accesses . 8
4.3.2 IP Mobility Mode Selection . 8
4.3.3 Authentication and Authorization . 8
5 Supporting QoS . 8
5.1 General . 8
5.2 UE reflective QoS procedures . 8
5.2.1 General . 8
5.2.2 DSCP marking rule . 9
5.2.3 Maintaining DSCP marking rules . 9
5.2.4 Receiving an IP packet . 9
5.2.5 Sending an IP packet. 10
5.3 Network procedures for supporting QoS . 10
5.4 Enabling UE reflective QoS function . 10
5.4.1 General . 10
5.4.2 UE procedure . 10
5.4.2.1 Sending Reflective QoS Indication (RQSI) to 3GPP AAA server . 10
5.4.2.2 Receiving the RQSI from 3GPP AAA server . 11
5.4.3 Network procedure . 12
5.4.3.1 RQSI from 3GPP AAA server to UE . 12
6 Tunnel management procedure . 12
6.1 Tunnel management procedures over S2b . 12
6.1.1 General . 12
6.1.2 UE procedures . 12
6.1.2.1 Tunnel establishment . 12
6.1.2.2 Tunnel modification . 12
6.1.2.3 Tunnel disconnection . 13
6.1.2.4 Support of reflective QoS . 13
6.1.3 ePDG procedure . 13
6.1.3.1 Tunnel establishment . 13
6.1.3.2 Tunnel modification . 13
6.1.3.3 Tunnel disconnection . 14
6.1.3.4 Support of QoS . 14
6.2 Tunnel management procedure over S2c . 14
6.2.1 S2c procedure over trusted fixed broadband access network . 14
6.2.1.1 General . 14
6.2.1.2 UE procedure . 14
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3GPP TS 24.139 version 11.5.0 Release 11 4 ETSI TS 124 139 V11.5.0 (2018-12)
6.2.1.2.1 Dual-Stack Mobile IPv6 initial attach . 14
6.2.1.2.2 Dual-Stack Mobile IPv6 handover . 14
6.2.1.2.3 Dual Stack Mobile IPv6 Re-Registration . 15
6.2.1.2.4 Dual-Stack Mobile IPv6 detach . 15
6.2.1.2.5 Support of reflective QoS . 15
6.2.1.3 HA procedure . 15
6.2.1.3.1 Dual-Stack Mobile IPv6 initial attach . 15
6.2.1.3.2 Dual-Stack Mobile IPv6 handover . 15
6.2.1.3.3 Dual Stack Mobile IPv6 Re-Registration . 15
6.2.1.3.4 Dual-Stack Mobile IPv6 detach . 15
6.2.1.3.5 Support of QoS . 15
6.2.2 S2c procedure over un-trusted fixed broadband access network . 15
6.2.2.1 General . 15
6.2.2.2 UE procedure . 16
6.2.2.3 ePDG Procedure . 16
6.2.2.4 HA Procedure . 16
7 Non-seamless WLAN Offload . . 16
7.1 General . 16
7.2 UE procedure . 16
7.3 Network procedure . 16
8 PDUs and parameters specific to the present document . 17
8.1 IETF RFC coding information defined within present document . 17
8.1.1 RQSI attributes . 17
8.1.1.1 AT_RQSI_IND attribute . 17
8.1.1.2 AT_RQSI_RES attribute . 17
Annex A (informative): Change history . 18
History . 19

ETSI

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3GPP TS 24.139 version 11.5.0 Release 11 5 ETSI TS 124 139 V11.5.0 (2018-12)
Foreword
rd
This Technical Specification has been produced by the 3 Generation 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 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 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

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3GPP TS 24.139 version 11.5.0 Release 11 6 ETSI TS 124 139 V11.5.0 (2018-12)
1 Scope
The present document specifies the UE – EPC procedures for accessing 3GPP Evolved Packet Core (EPC) via a Fixed
Broadband Access network.
The specification covers the Support of QoS, Tunnel management procedures including the support of NAT traversal,
and non-seamless offloading impacts.
The present document is applicable to the UE and the network. In this technical specification the network is the 3GPP
EPC.
2 References
The following documents contain provisions 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-specific 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".
[2] 3GPP TS 23.139: "3GPP System-Fixed Broadband Access Network Interworking".
[3] 3GPP TS 24.302: "Access to the Evolved Packet Core (EPC) via non-3GPP access networks;
Stage 3".
[4] 3GPP TS 24.303: "Mobility management based on Dual-Stack Mobile IPv6; Stage 3".
[5] IETF RFC 2474 (December 1998): "Definition of the Differentiated Services Field (DS Field) in
the IPv4 and IPv6 Headers".
[6] IETF RFC 4187 (January 2006): "Extensible Authentication Protocol Method for 3rd Generation
Authentication and Key Agreement (EAP-AKA)".
[7] IETF RFC 5996 (September 2010): "Internet Key Exchange Protocol Version 2 (IKEv2)".
[8] IETF RFC 4555 (June 2006): "IKEv2 Mobility and Multihoming Protocol (MOBIKE)".
[9] IETF RFC 3948 (January 2005): "UDP Encapsulation of IPsec ESP Packets".
[10] IETF RFC 4301 (December 2005): "Security Architecture for the Internet Protocol".
[11] Broadband Forum TR-058: "Multi-service Architecture and Framework Requirements",
September 2003.
[12] Broadband Forum TR-059: "Architecture Requirements for the Support of QoS-Enabled IP
Service", September 2003.
[13] Broadband Forum TR-101: "Migration to Ethernet-based DSL Aggregation", Issue 2, July 2011.
[14] Broadband Forum TR-134: "Policy Control Framework", Issue 1, July 2012.
[15] Broadband Forum TR-145: "Multi-service Broadband Network Functional Modules and
Architecture", Issue 1, November 2012.
[16] Broadband Forum TR-203: "Interworking between Next Generation Fixed and 3GPP Wireless
Access", Issue 1, August 2012.
ETSI

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3GPP TS 24.139 version 11.5.0 Release 11 7 ETSI TS 124 139 V11.5.0 (2018-12)
[17] Broadband Forum TR-146: "Subscriber Sessions", Issue 1, May 2013.
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].
Fixed Broadband Access network: Fixed broadband access network is a type of high-speed Internet access for multi-
service broadband packet networking. The fixed broadband access system is specified by the Broadband Forum in
BBF TR-058 [11], BBF TR-059 [12], BBF TR-101 [13], BBF TR-134 [14], BBF TR-145 [15], BBF TR-146 [17], and
BBF TR-203 [16].
UE reflective QoS function: A UE function that supports reflective QoS for uplink traffic over a fixed broadband
access network as specified in 3GPP TS 23.139 [2].
Non-seamless WLAN offload (NSWO): NSWO is a capability of a UE supporting routing specific IP flows over the
WLAN access without traversing the EPC as defined in 3GPP TS 23.139 [2].
For the purposes of the present document, the following terms and definitions given in 3GPP TS 24.303 [4]
subclause 3.1 apply:
Home Agent (HA)
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 the definition of the same abbreviation, if any, in
3GPP TR 21.905 [1].
DSCP Differentiated Services Code Point
NAT Network Address Translation
P-GW PDN Gateway
QoS Quality of Service
RQSI Reflective QoS Indication
EPC Evolved Packet Core
4 General
4.1 Support of Fixed Broadband Access Network Interworking
The support of fixed broadband access network is based on the network configuration as specified in
3GPP TS 23.139 [2]. The fixed broadband access network interworking related functions are triggered by the network if
the network knows the UE local access network is a fixed broadband access network. For instance, the network can be
statically configured with a mapping between the UE local IP address and the local access network type.
For access to 3GPP Evolved Packet Core (EPC) via a fixed broadband access network or non-seamless WLAN offload
at a fixed broadband access network or both, the EPC network procedures and the UE procedures are specified in this
document. In all other cases, the EPC network procedure and the UE procedures are specified in 3GPP TS 24.302 [3]
and 3GPP TS 24.303 [4].
4.2 Network Discovery and Selection
4.2.1 Access network discovery and selection procedures
When interworking with fixed broadband access, the access network discovery and selection procedures specified in
3GPP TS 24.302 [3] is applied.
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3GPP TS 24.139 version 11.5.0 Release 11 8 ETSI TS 124 139 V11.5.0 (2018-12)
4.2.2 EPC network selection
When interworking with fixed broadband access, the EPC network selection procedures specified in
3GPP TS 24.302 [3] is applied.
4.2.3 Access network reselection
When interworking with fixed broadband access, the access network reselection procedures specified in
3GPP TS 24.302 [3] is applied.
4.2.4 Data traffic routing of IP flows
When interworking with fixed broadband access, the data routing of IP flows procedures specified in
3GPP TS 24.302 [3] is applied.
4.3 UE – EPC Network Protocols
4.3.1 Trusted and Untrusted Accesses
When interworking with Fixed Access Broadband, the UE-EPC Network protocols related to trusted and untrusted
access procedures specified in 3GPP TS 24.302 [3] is applied.
4.3.2 IP Mobility Mode Selection
When interworking with Fixed Access Broadband, the UE-EPC Network protocols related to IP Mobility Mode
Selection procedures specified in 3GPP TS 24.302 [3] is applied.
4.3.3 Authentication and Authorization
When interworking with Fixed Access Broadband, the UE-EPC Network protocols related to Authentication and
Authorization procedures specified in 3GPP TS 24.302 [3] is applied.
5 Supporting QoS
5.1 General
When interworking with a fixed broadband access network, DSCP marking is used for setting QoS as specified in
IETF RFC 2474 [5].
For downlink traffic, the 3GPP network sets the DSCP value on the outer header of each IP packet on a per-flow basis.
When tunnelling the IP packet to the UE, the network copies the DSCP value from the inner IP header to the new outer
IP header.
For uplink traffic, the reflective QoS on uplink traffic is optionally supported by the UE when accessing a fixed
broadband access network. The reflective QoS is achieved by creating a DSCP marking rule based on the received
downlink traffic.
The BBF network performs QoS treatment and QoS remapping based on DSCP value of the outer IP header.
5.2 UE reflective QoS procedures
5.2.1 General
A UE may support the UE reflective QoS function for uplink traffic.
For a UE supporting UE reflective QoS function, and if UE reflective QoS function is enabled by the network, the UE
shall create uplink DSCP marking rules based on the received downlink traffic. Each uplink DSCP marking rule
contains a n-tuple rule which is created based on the corresponding n-tuple of the received downlink traffic. The UE
shall use the uplink DSCP marking rules to set the DSCP field of the outer IP header of the outgoing IP packets.
The UE reflective QoS function is enabled by the network as specified in subclause 5.4.
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3GPP TS 24.139 version 11.5.0 Release 11 9 ETSI TS 124 139 V11.5.0 (2018-12)
5.2.2 DSCP marking rule
The DSCP marking rules contains following parameter values:
- Source IP address;
- Destination IP address;
- Source port number;
- Destination port number;
- Protocol type;
- DSCP marking value; and
- Timestamp.
The source IP address refers to the IP address used by the UE as source IP address when generating IP traffic.
The destination IP address refers to the IP address of the data packets destined for the UE.
The source port number refers to the port number used by the UE as source port number when generating IP traffic.
The destination port number refers to the port number of the data packets destined for the UE.
The protocol type is a value among the internet protocol numbers as defined in IANA. In case of IPv4, the protocol type
value is the value of the outer IP header protocol type field. In case of IPv6, the protocol type value is the value of the
last next header field.
The timestamp is the time that the DSCP marking rule was created or the last time the DSCP marking rule was applied.
5.2.3 Maintaining DSCP marking rules
The DSCP marking table is created when the first DSCP marking rule is created based on the received downlink IP
packet.
Depending on the protocol type, the n-tuple is either a 5-tuple (including: source IP address, destination IP address,
source port number, destination port number, and protocol type) or a 3-tuple (including source IP address, destination IP
address, and protocol type).
The lifetime of the DSCP marking table is same as the associated PDN connection.
A UE may remove the expired entries from the table based on the timestamp. How long the entry shall be maintained in
the table is an implementation specific value.
5.2.4 Receiving an IP packet
When receiving an IP packet, the UE shall perform a lookup in the DSCP marking table based on the n-tuple of the IP
header. If tunnel is established between the UE and the network, the lookup is performed after the tunnel de-
capsulation.
If no matching entry is found, a new entry shall be created as follows:
- The source IP address of the new entry is the destination IP address of the received packets;
- The source port number of the new entry is the destination port number of the received packets;
- The destination IP address of the new entry is the source IP address of the received packets;
- The destination port number of the new entry is the source port number of the received packets;
- The protocol type value is either the value of the last protocol type field in IPv4 case, or the value of the last next
header field in case of IPv6;
- The DSCP field is set as same as the DSCP field of the received outer IP header; and
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...

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