ETSI GS F5G 014 V1.1.1 (2023-05)

Fifth Generation Fixed Network (F5G); F5G Network Architecture Release 2

DGS/F5G-0014

General Information

• Status: Not Published
• Technical Committee: F5G - 5th Generation Fixed Network
• Current Stage: 12 - Completion
• Due Date: 20-Apr-2023
• Completion Date: 03-May-2023

Standards Content (Sample)

ETSI GS F5G 014 V1.1.1 (2023-05)






GROUP SPECIFICATION
Fifth Generation Fixed Network (F5G);
F5G Network Architecture
Release 2
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 014 V1.1.1 (2023-05)

Reference
DGS/F5G-0014
Keywords
architecture, F5G

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All rights reserved.

ETSI

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3 ETSI GS F5G 014 V1.1.1 (2023-05)
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 . 10
3.3 Abbreviations . 10
4 Business requirements for network architecture . 12
4.1 Business requirements overview . 12
4.2 Business requirements driving the F5G architecture . 13
5 Network architecture . 14
5.1 Architecture design principles . 14
5.1.1 Multi-Service Network Platform . 14
5.1.2 Dynamic and Flexible Service Creation . 14
5.1.3 Decoupling Service Plane and Network Plane. 15
5.1.4 AI-based Control, Management and Analytics . 15
5.1.5 Security by Default . 15
5.2 Architecture overview . 15
5.3 Network topology and interfaces . 17
5.3.1 Network Overview . 17
5.3.2 Definition of Interfaces . 19
5.3.2.1 T interface . 19
5.3.2.2 T' interface . 19
5.3.2.3 T'' interface . 19
5.3.2.4 U interface . 19
5.3.2.5 U' interface . 20
5.3.2.6 B interface . 20
5.3.2.7 V interface . 20
5.3.2.8 Vo interface . 20
5.3.2.9 A10 interface . 21
5.3.2.10 A10' interface . 21
5.3.3 OTN Control Interfaces . 21
5.3.4 FTTR control interface . 23
5.4 Key enabling features . 24
5.4.1 Network Slicing . 24
5.4.1.1 Introduction . 24
5.4.1.2 Concepts . 24
5.4.1.3 Network Slicing Applicability . 26
5.4.1.4 F5G Slicing Architecture . 27
5.4.1.5 Network Slice Management . 28
5.4.1.6 Traffic Steering in the Context of Slicing . 29
5.4.1.7 Fibre-wireless coordination . 29
®
5.4.1.8 Wi-Fi Slicing . 30
5.4.1.9 PON Slicing . 31
5.4.1.9.1 Introduction . 31
5.4.1.9.2 User Group Oriented Slicing . 31
5.4.1.9.3 Service-Oriented Slicing. 32
5.4.1.10 OTN Slicing . 32
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4 ETSI GS F5G 014 V1.1.1 (2023-05)
5.4.1.11 IP AggN Slicing . 34
5.4.2 Traffic Steering . 35
5.4.2.1 Overview . 35
5.4.2.2 Traffic Steering Architecture . 35
5.4.2.2.1 High-level Framework . 35
5.4.2.2.2 Management Control and Analytics (MCA) functions . 36
5.4.2.2.3 Access Network Element Based Functions . 37
5.4.2.2.4 Aggregation Network Element Based Functions . 38
5.4.2.3 Example for Traffic Steering. 38
5.4.3 Separation of Services Plane and Underlay Plane . 39
5.4.3.1 Introduction . 39
5.4.3.1.1 Purpose of service and network separation. 39
5.4.3.1.2 Implementation of separation between service and network . 40
5.4.3.2 The Underlay Plane . 41
5.4.3.2.1 Introduction . 41
5.4.3.2.2 Bearer Technologies . 42
5.4.3.2.3 Summary and Analyses . 44
5.4.3.3 The Service Plane . 44
5.4.3.3.1 Introduction . 44
5.4.3.3.2 Traffic encapsulation for the Service Plane . 45
5.4.3.3.3 Signalling for the Service Plane . 45
5.4.4 The Aggregation Network Fabric . 46
5.4.4.1 IP/Ethernet Fabric . 46
5.4.4.2 OTN Fabric . 47
5.5 Management, Control and Analytics (MCA) . 49
5.5.1 Overview . 49
5.5.2 Autonomous Management and Control . 49
5.5.3 Digital Twin and Telemetry . 50
5.5.4 Network Abstraction and Model-driven Design . 50
5.6 Security . 51
6 Network devices/equipment requirements . 51
6.1 Customer Premises Network requirements . 51
6.2 Optical Access Network requirements . 52
6.2.1 Access Network System Requirements . 52
6.2.2 ONU Requirements. 52
6.2.2.1 Functional Requirements . 52
6.2.3 OLT Requirements . 53
6.2.3.1 Functional Requirements . 53
6.2.3.2 Interface Requirements . 54
6.3 Optical Transport Network requirements . 54
6.4 IP Network requirements . 55
6.5 F5G Security requirements . 55
7 Network migration . 55
Annex A (informative): How the F5G Architecture addresses the Gaps . 58
History . 61


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5 ETSI GS F5G 014 V1.1.1 (2023-05)
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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BLUETOOTH is a trademark registered and owned by Bluetooth SIG, Inc.
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 008 [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 networks 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
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6 ETSI GS F5G 014 V1.1.1 (2023-05)
to market needs and it supports different cloud-oriented Information and Communication Technology (ICT)
architectures.
1 Scope
The present document specifies the End-to-End network architecture, features and related network devices/elements'
requirements for F5G, including on-premises, Access, IP and Transport Networks. The present document defines new
features and enhance existing ones.
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™: "IEEE Standard for Information Technology -- Telecommunications and
Information Exchange between Systems Local and Metropolitan Area Networks -- Specific
Requirements Part 11: 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".
[20] ETSI GS F5G 006 (V1.1.1): "Fifth Generation Fixed Network (F5G); End-to-End Management
and Control; Release #1".
[21] ETSI GS F5G 011: "Fifth Generation Fixed Network (F5G); Telemetry Framework and
Requirements for Access Networks".
[22] ETSI GS F5G 012 (V1.1.1): "Fifth Generation Fixed Network (F5G); Security; F5G Security
Countermeasure Framework Specification".
[23] ETSI TS 103 924: "Optical Network and Device Security Catalogue of requirements".
[24] IETF RFC 7950: "The YANG 1.1 Data Modeling Language".
[25] IETF RFC 6241: "Network Configuration Protocol (NETCONF)".
[26] IETF RFC 8040: "RESTCONF Protocol".
[27] ETSI GS F5G 013 (V1.1.1): "Fifth Generation Fixed Network (F5G); F5G Technology Landscape
Release #2".
[28] ETSI GS F5G 015 (V1.1.1): "Fifth Generation Fixed Network (F5G); F5G Residential Services
Quality Evaluation and Classification".
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 008 (V1.1.1): "Fifth Generation Fixed Network (F5G); F5G Use Cases Release #2".
[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: "Transport 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-ietf-ccamp-yang-otn-slicing: "Framework and Data Model for OTN Network Slicing".
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8 ETSI GS F5G 014 V1.1.1 (2023-05)
[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-ietf-teas-ns-ip-mpls: "Realizing Network Slices in IP/MPLS Networks".
[i.11] ETSI GR IPE 005: "IPv6 Enhanced Innovation (IPE); 5G Transport over IPv6 and SRv6".
[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".
3 Definition of terms, symbols and abbreviations
3.1 Terms
For the purposes of the present document, the following terms apply:
access node:
...