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GSM Association Non-confidential
Official Document NG.127 - E2E Network Slicing Architecture
V1.0 Page 1 of 48
E2E Network Slicing Architecture
Version 1.0
03 June 2021
This is a White Paper of the GSMA
Security Classification: Non-confidential
Access to and distribution of this document is restricted to the persons permitted by the security classification. This document is confidential to the
Association and is subject to copyright protection. This document is to be used only for the purposes for which it has been supplied and
information contained in it must not be disclosed or in any other way made available, in whole or in part, to persons other than those permitted
under the security classification without the prior written approval of the Association.
Copyright Notice
Copyright © 2021 GSM Association
Disclaimer
The GSM Association (“Association”) makes no representation, warranty or undertaking (express or implied) with respect to and does not accept
any responsibility for, and hereby disclaims liability for the accuracy or completeness or timeliness of the information contained in this document.
The information contained in this document may be subject to change without prior notice.
Antitrust Notice
The information contain herein is in full compliance with the GSM Association’s antitrust compliance policy.
GSM Association Non-confidential
Official Document NG.127 - E2E Network Slicing Architecture
V1.0 Page 2 of 48
Table of Contents
1 Introduction 4
1.1 Overview 4
1.2 Scope 4
1.3 Acronyms 5
1.4 References 8
2 Blueprint of Network Slicing 10
2.1 Definition of technologies for Network Slicing development 10
2.2 Motivations for Operators to introduce Network Slicing 10
2.3 Roles in Network Slicing 11
2.4 SLA/SLS attributes for Network Slicing 12
2.4.1 Service specific security 12
2.5 High level Requirements 12
3 Technology Aspects to achieve Network Slicing 13
3.1 SLA/SLS 13
3.2 Provisioning and Operation 13
3.3 Isolation 14
3.3.1 Slice performance isolation 15
3.3.2 Slice management isolation 15
3.3.3 Slice security isolation 16
3.4 API Exposure 16
3.5 Low latency communication 17
3.6 Security 17
3.7 Industry Customer Management 18
4 Network Slicing Architecture 19
4.1 Design principles of infrastructure stratum 19
4.2 Design principles of network and application stratum 20
4.3 Design principles of O&M stratum 20
5 Ongoing work and outlook 21
5.1 Radio Access Network 21
5.1.1 3GPP RAN 21
5.1.2 O-RAN ALLIANCE 22
5.2 Mobile Core Network 24
5.2.1 3GPP SA 24
5.2.2 Broadband Forum - 5G Fixed Mobile Convergence architecture and
requirements - 24
5.3 Transport Network 25
5.3.1 IETF 25
5.3.2 Broadband Forum - 5G Transport architecture and requirements- 25
5.3.3 IEEE 802 - switched Ethernet networking and Time Sensitive Networking
- 25
5.3.4 ITU-T SG15 - optical networking, and synchronization - 26
5.3.5 MEF 26
5.4 O&M 27
GSM Association Non-confidential
Official Document NG.127 - E2E Network Slicing Architecture
V1.0 Page 3 of 48
5.4.1 3GPP SA5 27
5.4.2 IETF 29
5.4.3 ETSI ISG ZSM 31
5.4.4 ETSI ISG NFV 33
5.4.5 ONAP 33
5.4.6 ETSI OSM 36
5.4.7 TM Forum 39
5.5 Device 40
5.5.1 UE Route Selection Policy 40
5.5.2 GSMA Terminal Steering Group 41
6 On a phased-based rollout for E2E network slicing 41
7 Conclusions 43
Annex A Reference List 45
A.1 O&M, 3GPP SA5 45
A.2 O&M, IETF 45
Annex A.1 ETSI OSM 47
Annex B Document Management 48
GSM Association Non-confidential
Official Document NG.127 - E2E Network Slicing Architecture
V1.0 Page 4 of 48
1 Introduction
1.1 Overview
The purpose of this document is to emphasize necessity of cross-standardization
collaboration to realize E2E Network Slicing Architecture designed from an End-to-End
(E2E) perspective, spanning over different technical domains (e.g., device, access network,
core network, transport network and network management system) and multiple vendors
and to provide guidance on actions in each Standards Developing Organizations (SDOs)
and open source projects.
1.2 Scope
The intention of this document is to show a guidance of the entire industry ecosystem; for
operators, vendors and service providers to be able to consider common solutions of
network slicing which have not been fully defined yet.
Network slicing is defined in 3GPP as a logical network that provides specific network
capabilities and network characteristics and is composed of RAN, CN, and transport
network. From operator perspective, it is important to provide customers with network
service in non-3GPP domain such as SGi LAN/N6 network and fixed access network as well
as in 3GPP domain. In this document, E2E network slicing is defined as a logical network
spanning over both 3GPP and non-3GPP domains. It is essential to provide customized E2E
network service complying with agreed Service Level Agreements (SLAs). Roaming feature
is out of scope of this document.
The scope of this document is to provide the description of:
1. Blueprint of E2E Network Slicing Architecture
a) Definition of network slicing in this whitepaper
b) Motivation to introduce a network slicing technology
c) Usage scenario and high level requirements
2. Technology aspect
a) Indication of several aiming technology aspects to be achieved by network slicing
3. SDOs and open source projects
a) Ongoing work and outlook
b) Gaps between existing specifications and expected network slicing which can
realize the technology aspects above in each domain
c) Potential proposal of specifications to be considered
These descriptions are snapshot based on current status of these standardization activities,
typically activities of the 3rd Generation Partnership Project (3GPP) Release 17.
GSM Association Non-confidential
Official Document NG.127 - E2E Network Slicing Architecture
V1.0 Page 5 of 48
1.3 Acronyms
Acronym
Description
3GPP
3rd Generation Partnership Project
5GC
5G Core
5GS
5G System
AGF
Access Gateway Function
AI/ML
Artificial Intelligence/Machine Learning
AMF
Access and Mobility Management Function
AN
Access Network
API
Application Programming Interface
B2B
Business to Business
B2B2X
Business to Business to everything
B2C
Business to Consumer
BNG
Broadband Network Gateway
BSS
Business Support System
CAC
Connection Admission Control
CN
Core Network
CNF
Containerized Network Function
COTS
Commercial off-the-Shelf
CPE
Customer Premises Equipment
CSC
Communication Service Customer
CSMF
Communication Service Management Function
CSP
Communication Service Provider
CU
Central Unit
CUPS
Control and User Plane Separation
DN
Deterministic Network
DNN
Data Network Name
E2E
End-to-End
FMIF
Fixed-Mobile Interworking Function
GST
Generic network Slice Template
HNF
Hybrid Network Function
IOC
Information Object Class
KPI
Key Performance Indicator
LSO
Lifecycle Services Orchestration
MNO
Mobile Network Operator
MOI
Management Object Instance
NaaS
Networks as a Service
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