ETSI GS F5G 004 V1.1.1 (2022-01)

Fifth Generation Fixed Network (F5G); F5G Network Architecture

DGS/F5G-004_ARCHITECTURE

General Information

• Status: Not Published
• Technical Committee: F5G - 5th Generation Fixed Network
• Current Stage: 12 - Completion
• Due Date: 21-Feb-2022
• Completion Date: 31-Jan-2022

Standards Content (Sample)

ETSI GS F5G 004 V1.1.1 (2022-01)






GROUP SPECIFICATION
Fifth Generation Fixed Network (F5G);
F5G Network Architecture
Disclaimer
The present document has been produced and approved by the Fifth Generation Fixed Network (F5G) ETSI Industry
Specification Group (ISG) and represents the views of those members who participated in this ISG.
It does not necessarily represent the views of the entire ETSI membership.

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2 ETSI GS F5G 004 V1.1.1 (2022-01)

Reference
DGS/F5G-004_ARCHITECTURE
Keywords
architecture, F5G

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ETSI

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3 ETSI GS F5G 004 V1.1.1 (2022-01)
Contents
Intellectual Property Rights . 5
Foreword . 5
Modal verbs terminology . 5
Introduction . 5
1 Scope . 6
2 References . 6
2.1 Normative references . 6
2.2 Informative references . 7
3 Definition of terms, symbols and abbreviations . 8
3.1 Terms . 8
3.2 Symbols . 8
3.3 Abbreviations . 8
4 Business requirements for network architecture . 10
4.1 Business requirements overview . 10
4.2 Business requirements driving the F5G architecture . 10
5 Network architecture . 11
5.1 Architecture design principles . 11
5.1.1 Multi-Service Network Platform . 11
5.1.2 Dynamic and Flexible Service Creation . 12
5.1.3 Decoupling Service Plane and Network Plane. 12
5.1.4 AI-based Control, Management and Analytics . 12
5.2 Architecture overview . 12
5.3 Network topology and interfaces . 15
5.3.1 Network Overview . 15
5.3.2 Definition of Interfaces . 16
5.3.2.1 T interface . 16
5.3.2.2 T' interface . 17
5.3.2.3 T'' interface . 17
5.3.2.4 U interface . 17
5.3.2.5 U' interface . 17
5.3.2.6 B interface . 17
5.3.2.7 V interface . 17
5.3.2.8 V interface . 18
o
5.3.2.9 A10 interface . 18
5.3.2.10 A10' interface . 18
5.3.3 OTN Control Interfaces . 19
5.4 Key enabling features . 20
5.4.1 Network Slicing . 20
5.4.1.1 Introduction . 20
5.4.1.2 Concepts . 21
5.4.1.3 Network Slicing Applicability . 23
5.4.1.4 F5G Slicing Architecture . 24
5.4.1.5 Network Slice Management . 25
5.4.1.6 Traffic Steering in the Context of Slicing . 26
5.4.1.7 Wi-Fi Slicing . 26
5.4.1.8 PON Slicing . 26
5.4.1.8.1 Introduction . 26
5.4.1.8.2 User Group Oriented Slicing . 27
5.4.1.8.3 Service-Oriented Slicing. 27
5.4.1.9 OTN Slicing . 28
5.4.1.10 IP AggN Slicing . 30
5.4.2 Traffic Steering . 31
5.4.2.1 Overview . 31
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4 ETSI GS F5G 004 V1.1.1 (2022-01)
5.4.2.2 Traffic Steering Architecture . 31
5.4.2.2.1 High-level Framework . 31
5.4.2.2.2 Management Control and Analytics (MCA) functions . 32
5.4.2.2.3 Access Network Element Based Functions . 33
5.4.2.2.4 Aggregation Network Element Based Functions . 33
5.4.2.3 Example for Traffic Steering. 34
5.4.3 Separation of Services Plane and Underlay Plane . 35
5.4.3.1 Introduction . 35
5.4.3.1.1 Purpose of service and network separation. 35
5.4.3.1.2 Implementation of separation between service and network . 36
5.4.3.2 The Underlay Plane . 36
5.4.3.2.1 Introduction . 36
5.4.3.2.2 Bearer Technologies . 38
5.4.3.2.3 Summary and Analyses . 40
5.4.3.3 The Service Plane . 40
5.4.3.3.1 Introduction . 40
5.4.3.3.2 Traffic encapsulation for the Service Plane . 41
5.4.3.3.3 Signalling for the Service Plane . 41
5.4.4 The Aggregation Network Fabric . 41
5.4.4.1 IP/Ethernet Fabric . 41
5.4.4.2 OTN Fabric . 42
6 Network devices/equipment requirements . 44
6.1 Customer Premises Network requirements . 44
6.2 Optical Access Network requirements . 44
6.2.1 Access Network System Requirements . 44
6.2.2 ONU Requirements. 45
6.2.2.1 Functional Requirements . 45
6.2.3 OLT Requirements . 45
6.2.3.1 Functional Requirements . 45
6.2.3.2 Interface Requirements . 46
6.3 Optical Transport Network requirements . 46
6.4 IP Network requirements . 47
7 Network migration . 48
Annex A (informative): Change History . 50
History . 51


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Intellectual Property Rights
Essential patents
IPRs essential or potentially essential to normative deliverables may have been declared to ETSI. The declarations
pertaining to these essential IPRs, if any, are 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 Directives including the ETSI IPR Policy, no investigation regarding the essentiality of IPRs,
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.
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Foreword
This Group Specification (GS) has been produced by ETSI Industry Specification Group (ISG) Fifth Generation Fixed
Network (F5G).
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.
Introduction
The F5G network, as described in ETSI GR F5G 002 [i.2], has committed to three characteristics for extending and
enhancing fixed networks, eFBB, FFC and GRE. These characteristics are derived from the F5G use cases ETSI
GR F5G 001 [i.1] that require these enhancements. To implement these characteristics, the F5G architecture has
introduced new design principles and new features. Such features include separation of data plane into Underlay Plane
and Service Plane, dual network fabrics for the Aggregation Network, comprised of an IP/Ethernet and an OTN fabric,
and the seamless and combined usage of PON and OTN, E2E slicing, etc. Based on these design principles and new
features, F5G can provide a variety of services for residential and enterprise customers over one physical network with
guaranteed SLAs. The new F5G architecture balances performance and operational efficiency through a higher degree
of flexibility and choice. Network services can be carried by an IP/Ethernet or an OTN fabric depending on the network
characteristics and the performance requirements and allowing for independent changes of the Underlay or Service
Planes to match the needs of applications, services or users. Using EVPN as the unified Service Plane technology
simplifies the service plane protocols and management. This Service Plane is easily programmable to adapt to market
needs and it supports different cloud-oriented Information and Communication Technology (ICT) architectures.
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6 ETSI GS F5G 004 V1.1.1 (2022-01)
1 Scope
The F5G Use Cases document ETSI GR F5G 002 [i.1] has defined many use cases for F5G. To support these use cases,
the network architecture will need to be simple, agile, optimized and intelligent. The present document defines the F5G
E2E network architecture and related network node requirements, including Customer Premise Network (CPN), Access
Network and Aggregation Network. F5G takes SDN/NFV into account for the network's control layer. The F5G
architecture will explore new network features like a seamless connection between Optical Transport Network and
Access Network, E2E full-stack slicing, etc.
The F5G end-to-end management architecture is considered out of scope for the present document.
The present document also specifies technical requirements for the network nodes and elements in the architecture. The
focus will be on Telecommunication networks in particular.
2 References
2.1 Normative references
References are either specific (identified by date of publication and/or edition number or version number) or
non-specific. For specific references, only the cited version applies. For non-specific references, the latest version of the
referenced document (including any amendments) applies.
Referenced documents which are not found to be publicly available in the expected location might be found at
https://docbox.etsi.org/Reference/.
NOTE: While any hyperlinks included in this clause were valid at the time of publication, ETSI cannot guarantee
their long term validity.
The following referenced documents are necessary for the application of the present document.
[1] IETF RFC 8453: "Framework for Abstraction and Control of TE Networks (ACTN)".
[2] Recommendation ITU-T G.709/Y.1331: "Interfaces for the optical transport network".
[3] Recommendation ITU-T G.709.1/Y.1331.1: "Flexible OTN short-reach interfaces".
[4] Recommendation ITU-T G.709.3/Y.1331.3: "Flexible OTN long-reach interfaces".
[5] IETF RFC 8402: "Segment Routing Architecture".
[6] IETF RFC 8986: "Segment Routing over IPv6 (SRv6) Network Programming".
[7] IETF RFC 7209: "Requirements for Ethernet VPN (EVPN)". .
[8] IETF RFC 8584: "Framework for Ethernet VPN Designated Forwarder Election Extensibility".
[9] IETF RFC 4760: "Multiprotocol Extensions for BGP-4".
[10] IEEE 802.11ax™: "Wireless LAN Medium Access Control (MAC) and Physical Layer (PHY)
Specifications Amendment 1: Enhancements for High-Efficiency WLAN".
[11] Recommendation ITU-T G.9807.1: "10-Gigabit-capable symmetric passive optical network (XGS-
PON)".
[12] Recommendation ITU-T G.798: "Characteristics of optical transport network hierarchy equipment
functional blocks".
[13] Recommendation ITU-T G.873.1: "Optical transport network: Linear protection".
[14] Recommendation ITU-T G.873.2: "ODUk shared ring protection".
[15] Recommendation ITU-T G.873.3: "Optical transport network - Shared mesh protection".
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[16] Recommendation ITU-T G.8251: "The control of jitter and wander within the optical transport
network (OTN)".
[17] Recommendation ITU-T G.8201: "Error performance parameters and objectives for multi-operator
international paths within optical transport networks".
[18] IEEE 802.3.1™: "IEEE Standard for Management Information Base (MIB) Definitions for
Ethernet".
[19] IEEE 802.1Q™: "IEEE Standard for Local and metropolitan area networks--Bridges and Bridged
Networks".
2.2 Informative references
References are either specific (identified by date of publication and/or edition number or version number) or
non-specific. For specific references, only the cited version applies. For non-specific references, the latest version of the
referenced document (including any amendments) applies.
NOTE: While any hyperlinks included in this clause were valid at the time of publication, ETSI cannot guarantee
their long term validity.
The following referenced documents are not necessary for the application of the present document but they assist the
user with regard to a particular subject area.
[i.1] ETSI GR F5G 002 (V1.1.1): "Fifth Generation Fixed Network (F5G); F5G Use Cases Release #1".
[i.2] ETSI GR F5G 001 (V1.1.1): "Fifth Generation Fixed Network (F5G); F5G Generation Definition
Release #1".
[i.3] ITU-T Study Group 15/Q18, G.fin-SA: "High speed fibre-based in-premises transceivers - system
architecture".
[i.4] IETF draft-ietf-ccamp-transport-nbi-app-statement: "sport Northbound Interface Applicability
Statement".
[i.5] IETF draft-ietf-teas-ietf-network-slices: "Framework for IETF Network Slices".
[i.6] IETF draft-ietf-teas-applicability-actn-slicing: "Applicability of Abstraction and Control of Traffic
Engineered Networks (ACTN) to Network Slicing".
[i.7] IETF draft-zheng-ccamp-yang-otn-slicing: "Framework and Data Model for OTN Network
Slicing".
[i.8] ITU-T Study Group 15/Q11 G.osu: "Optical Service Unit (OSU) path layer network".
[i.9] IETF draft-ietf-teas-enhanced-vpn: "A Framework for Enhanced Virtual Private Network (VPN+)
Services".
[i.10] IETF draft-bestbar-teas-ns-packet: "Realizing Network Slices in IP/MPLS Networks".
[i.11] ETSI GR IPE 005: "IPv6 Enhanced Innovation (IPE); IPE_5G Transport and Cloud and IP
network Convergence".
[i.12] IETF RFC 8655: "Deterministic Networking Architecture".
[i.13] IETF RFC 2702: "Requirements for Traffic Engineering Over MPLS".
[i.14] IETF RFC 3209: "RSVP-TE: Extensions to RSVP for LSP Tunnels".
[i.15] IETF draft-ietf-spring-resource-aware-segments: "Introducing Resource Awareness to SR
Segments".
[i.16] IEC 61158: "Industrial communication networks - Fieldbus specifications".
[i.17] ETSI GS F5G 006: "End-to-End Management and Control of F5G Networks".
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3 Definition of terms, symbols and abbreviations
3.1 Terms
For the purposes of the present document, the following terms apply:
application list: list of applications and the associated attributes to identify the application in a network element
EtherCAT: Ethernet for Control Automation Technology is an Ethernet-based fieldbus system
NOTE: The protocol is standardized in IEC 61158 [i.16] and is suitable for both hard and soft real-time
computing requirements in automation technology.
network slice: logical network that achieves specific service requirements
3.2 Symbols
Void.
3.3 Abbreviations
For the present document, the following abbreviations apply:
AI Artificial Intelligence
API Application Programming Interface
ARPU Average Revenue Per User
ASG Access Service Gateway
BGP Border Gateway Protocol
BNG Broadband Network Gateway
BSS Business Support System
BYOD Bring You Own Device
CE Customer Equipment
CPE Customer Premises Equipment
CPN Customer Premises Network
CPN-A CPN Agent
CPU Central Processing Unit
DC Data Centre
DC-GW Data Center Gateway
DSCP Differentiated Services Code Point
E2E End-to-End
E-CPE Enterprise CPE
eFBB enhanced Fixed BroadBand
ETH Ethernet
EVPN Ethernet VPN
FEC Forward Error Correction
FFC Full Fibre Connection
FlexO Flexible Optical transport network
FTTH Fibre-To-The-Home
FTTR Fibre-To-The-Room
GEM GPON Encapsulation Mode
GMPLS Generalized Multi-Protocol Label Switching
GPON Gigabit Passive Optical Network
GRE Guaranteed Reliable Experience
ICT Information and Communication Technology
IE Industrial Equipment
IP RAN IP Radio Access Network
IP Internet Protocol
IPTV Internet Protocol Television
IT Information Technology
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L2VPN Layer 2 VPN
LAN Local Area Network
LSP Link State Protocol
MAC Media Access Control
MAN Metropolitan Area Network
MEF Metro Ethernet Forum
MP-BGP Multiprotocol Extensions for BGP
MPLS Multiprotocol Label Switching
MS-OTN Multi-Service OTN
NAT Network Address Translation
NFV Network Function Virtualisation
NMS Network Management System
NSI Network Slice Instance
NSP Network Service Provider
O&M Operation and Maintenance
OAM Operation, Administration and Maintenance
OAM&P
...