ETSI GR NFV-EVE 012 V3.1.1 (2017-12)

Network Functions Virtualisation (NFV) Release 3; Evolution and Ecosystem; Report on Network Slicing Support with ETSI NFV Architecture Framework

DGR/NFV-EVE012

General Information

• Status: Published
• Publication Date: 20-Dec-2017
• Technical Committee: NFV EVE - Evolution and Ecosystem
• Current Stage: 12 - Completion
• Due Date: 08-Jan-2018
• Completion Date: 21-Dec-2017

Standards Content (Sample)

ETSI GR NFV-EVE 012 V3.1.1 (2017-12)







GROUP REPORT
Network Functions Virtualisation (NFV) Release 3;
Evolution and Ecosystem;
Report on Network Slicing Support
with ETSI NFV Architecture Framework
Disclaimer
The present document has been produced and approved by the Network Functions Virtualisation (NFV) 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 GR NFV-EVE 012 V3.1.1 (2017-12)



Reference
DGR/NFV-EVE012
Keywords
network, NFV, slicing

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3 ETSI GR NFV-EVE 012 V3.1.1 (2017-12)
Contents
Intellectual Property Rights . 5
Foreword . 5
Modal verbs terminology . 5
1 Scope . 6
2 References . 6
2.1 Normative references . 6
2.2 Informative references . 6
3 Definitions and abbreviations . 7
3.1 Definitions . 7
3.2 Abbreviations . 8
4 Overview of network slicing . 8
4.1 Introduction . 8
4.2 Concepts defined by SDOs and Fora and NFV architectural framework mapping . 8
4.2.1 Potential relevant SDOs and Fora . 8
4.2.2 NGMN . 10
4.2.2.1 Network slicing as defined by NGMN . 10
4.2.3 3GPP . 11
4.2.3.1 Network slicing as defined by 3GPP . 11
4.2.3.2 Mapping NFV and 3GPP network slicing concepts . 12
4.2.3.2.1 Network slice vs. Network service . 12
4.2.3.2.2 Architecture . 12
4.2.3.2.3 Network slice lifecycle management . 14
4.2.4 ONF . 14
4.2.4.1 Network slicing abstraction and resource control from the ONF perspective . 14
4.2.4.2 Mapping NFV and ONF SDN architecture network slicing concepts . 16
4.3 NFV and SDN relation in multi-tenant and multi-domain environments . 16
5 Use cases analysis . 18
5.1 Introduction . 18
5.2 Use case 1: Single operator domain network slice . 18
5.2.1 Description . 18
5.2.2 Security implication . 19
5.2.3 Reliability implication . 19
5.2.4 Relation to NFV constructs . 19
5.2.5 Potential impact to the NFV architectural framework . 19
5.3 Use case 2: Network Slice Instance creation . 20
5.3.1 Description . 20
5.3.2 Security implication . 20
5.3.3 Reliability implication . 20
5.3.4 Relation to NFV constructs . 21
5.3.5 Potential impact to the NFV architectural framework . 21
5.4 Use case 3: Network Slice Subnet Instance creation . 21
5.4.1 Description . 21
5.4.2 Security implication . 21
5.4.3 Reliability implication . 21
5.4.4 Relation to NFV constructs . 22
5.4.5 Potential impact to the NFV architectural framework . 22
5.5 Use case 4: Network Slice Instance creation, configuration and activation with VNFs . 22
5.5.1 Description . 22
5.5.2 Security implication . 22
5.5.3 Reliability implication . 22
5.5.4 Relation to NFV constructs . 22
5.5.5 Potential impact to the NFV architectural framework . 22
5.6 Use case 5: Priority of NSI for re-allocating the limited resources . 22
5.6.1 Description . 22
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4 ETSI GR NFV-EVE 012 V3.1.1 (2017-12)
5.6.2 Security implication . 23
5.6.3 Reliability implication . 23
5.6.4 Relation to NFV constructs . 23
5.6.5 Potential impact to the NFV architectural framework . 23
5.7 Use case 6: Network Slice as a Service . 23
5.7.1 Description . 23
5.7.2 Security implication . 23
5.7.2.0 Introduction . 23
5.7.2.1 Network service level . 24
5.7.2.2 VNF level . 24
5.7.3 Reliability implication . 26
5.7.4 Relation to NFV constructs . 26
5.7.5 Potential impact to the NFV architectural framework . 26
5.8 Use case 7: Network Slice Instance across multiple operators . 27
5.8.1 Description . 27
5.8.2 Security implication . 27
5.8.3 Reliability implication . 27
5.8.4 Relation to NFV constructs . 27
5.8.5 Potential impact to the NFV architectural framework . 27
6 Support of network slicing . 27
6.1 Recommendation: Architectural framework . 27
6.1.0 Introduction. 27
6.1.1 Reference points and/or interfaces . 27
6.1.2 Functional . 28
6.1.3 Descriptors . 28
6.2 Recommendation: Security . 28
6.2.0 Introduction. 28
6.2.1 Network service level . 28
6.2.2 VNF level . 29
6.3 Recommendation: Reliability . 29
6.4 Relation with ETSI ISG NFV group specifications . 29
7 Conclusion . 31
Annex A: Authors & contributors . 32
Annex B: Change History . 34
History . 35


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5 ETSI GR NFV-EVE 012 V3.1.1 (2017-12)
Intellectual Property Rights
Essential patents
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 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
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ETSI claims no ownership of these except for any which are indicated as being the property of ETSI, and conveys no
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not constitute an endorsement by ETSI of products, services or organizations associated with those trademarks.
Foreword
This Group Report (GR) has been produced by ETSI Industry Specification Group (ISG) Network Functions
Virtualisation (NFV).
Modal verbs terminology
In the present document "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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6 ETSI GR NFV-EVE 012 V3.1.1 (2017-12)
1 Scope
The present document analyses use cases related to network slicing as defined in SDOs and industry fora. Furthermore,
the present document describes how these use cases could be mapped to the current NFV concepts and supported by the
ETSI NFV architectural framework [i.2] and by NFV-MANO [i.10].
2 References
2.1 Normative references
Normative references are not applicable in the present document.
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 NFV 001 (V1.2.1) (05-2017): "Network Functions Virtualisation (NFV); Use Cases".
[i.2] ETSI GS NFV 002 (V1.2.1) (12-2014): "Network Functions Virtualisation (NFV); Architectural
Framework".
[i.3] ETSI GS NFV 003 (V1.2.1) (12-2014): "Network Functions Virtualisation (NFV); Terminology
for Main Concepts in NFV".
[i.4] ETSI GS NFV-EVE 005 (V1.1.1) (12-2015): "Network Functions Virtualisation (NFV);
Ecosystem; Report on SDN Usage in NFV Architectural Framework".
[i.5] ETSI GS NFV-IFA 009: "Network Functions Virtualisation (NFV); Management and
Orchestration; Report on Architectural Options".
[i.6] ETSI GS NFV-IFA 013 (V2.1.1) (10-2016): "Network Functions Virtualisation (NFV);
Management and Orchestration; Os-Ma-Nfvo reference point - Interface and Information Model
Specification".
[i.7] ETSI GS NFV-IFA 014 (V2.3.1) (08-2017): "Network Functions Virtualisation (NFV) Release 2;
Management and Orchestration; Network Service Templates Specification".
[i.8] ETSI GR NFV-IFA 022 (V0.8.1): "Network Functions Virtualisation (NFV) Release 3;
Management and Orchestration; Report on Management and Connectivity for Multi-Site
Services".
[i.9] ETSI GR NFV-IFA 028 (V0.13.0): "Network Functions Virtualisation (NFV) Release 3;
Management and Orchestration; Report on architecture options to support multiple administrative
domains".
[i.10] ETSI GS NFV-MAN 001 (V1.1.1) (12-2014): "Network Functions Virtualisation (NFV);
Management and Orchestration".
[i.11] ETSI GR NFV-REL 007 (V1.1.1) (09-2017): "Network Functions Virtualisation (NFV);
Reliability; Report on the resilience of NFV-MANO critical capabilities".
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7 ETSI GR NFV-EVE 012 V3.1.1 (2017-12)
[i.12] ETSI GS NFV-SEC 009 (V1.2.1) (12-2016): "Network Functions Virtualisation (NFV); NFV
Security; Report on use cases and technical approaches for multi-layer host administration".
[i.13] ETSI GS NFV-SEC 012 (V3.1.1) (01-2017): "Network Functions Virtualisation (NFV) Release 3;
Security; System architecture specification for execution of sensitive NFV components".
[i.14] NGMN Alliance: "Description of Network Slicing Concept", January 2016.
[i.15] NGMN Alliance: "5G security recommendations; Package #2: Network Slicing", April, 2016.
[i.16] ONF TR-521: "SDN Architecture", Issue 1.1, February 2016.
[i.17] ONF TR-526: "Applying SDN architecture to 5G slicing", Issue 1, April 2016.
[i.18] ONF TR 527: "Functional Requirements for Transport API", June 2016.
[i.19] ONF TR-540: "Orchestration: A More Holistic View", January 2017.
[i.20] 3GPP TS 22.261 (V15.2.0) (09-2017): "Service requirements for next generation new services and
markets".
[i.21] 3GPP TR 28.801 (V15.0.0) (09-2017): "Telecommunication management; Study on management
and orchestration of network slicing for next generation network".
[i.22] ETSI GS NGP 001: "Next Generation Protocol (NGP); Scenario Definitions".
[i.23] ETSI GS NFV-IFA 005: "Network Functions Virtualisation (NFV); Management and
Orchestration; Or-Vi reference point - Interface and Information Model Specification".
[i.24] ETSI GS NFV-IFA 006: "Network Functions Virtualisation (NFV); Management and
Orchestration; Vi-Vnfm reference point - Interface and Information Model Specification".
[i.25] ETSI GS NFV-IFA 008: "Network Functions Virtualisation (NFV); Management and
Orchestration; Ve-Vnfm reference point - Interface and Information Model Specification".
[i.26] ETSI GS NFV-IFA 012: "Network Functions Virtualization (NFV) Release 3; Management and
Orchestration; Os-Ma-Nfvo reference point - Application and Service Management Interface and
Information Model Specification".
[i.27] ETSI GS NFV-IFA 010: "Network Functions Virtualisation (NFV); Management and
Orchestration; Functional requirements specification".
[i.28] ETSI GS NFV-IFA 011: "Network Functions Virtualisation (NFV); Management and
Orchestration; VNF Packaging Specification".
[i.29] 3GPP TR 23.799: "Study on Architecture for Next Generation System".
[i.30] 3GPP TS 23.501: "System Architecture for the 5G System".
[i.31] 3GPP TS 23.502: "Procedures for the 5G System".
[i.32] 3GPP TR 33.899: "Study on the security aspects of the next generation system".
[i.33] 3GPP TS 28.531: "Provisioning of network slicing for 5G networks and services".
[i.34] 3GPP TS 28.530: "Management of network slicing in mobile networks; Concepts, use cases and
requirements".
3 Definitions and abbreviations
3.1 Definitions
For the purposes of the present document, the terms and definitions given in ETSI GS NFV 003 [i.3] apply.
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8 ETSI GR NFV-EVE 012 V3.1.1 (2017-12)
3.2 Abbreviations
For the purposes of the present document, the abbreviations given in ETSI GS NFV 003 [i.3] and the following apply:
3GPP 3rd Generation Partnership Project
5G Fifth Generation
AN Access Network
CN Core Network
CSMF Communication Service Management Function
HMEE Hardware-Mediated Execution Enclave
NF Network Function
NGMN Next Generation Mobile Networks
NGP Network Generation Protocols
NS Network Service
NSI Network Slice Instance
NSM Network Slice Manager
NSMF Network Slice Management Function
NSSI Network Slice Subnet Instance
NSSMF Network Slice Subnet Management Function
NST Network Slice Template
OAM Operations and Management
ONF Open Networking Foundation
QoS Quality of Service
SDN Software Defined Networking
SDO Standards Development Organisation
TN Transport Network
4 Overview of network slicing
4.1 Introduction
Network slicing is defined by multiple SDOs and Fora. However, the meaning and understanding of the network slicing
concept are different from each other and there is no common definition. The present document does not define network
slicing use cases or features but references external SDOs and Fora's definition and concept of network slicing within
the context of each individual SDO/Fora.
Clause 4.2 shows relevant external body's documents which introduce and define network slicing, and describes related
details provided in NGMN, 3GPP, and ONF. It also describes the possible relationship with the NFV constructs.
Clause 4.3 describes NFV and SDN relation in a multi-tenant and multi-domain environment in term of network slice
deployment.
4.2 Concepts defined by SDOs and Fora and NFV architectural
framework mapping
4.2.1 Potential relevant SDOs and Fora
Table 4.2.1-1 describes relevant SDOs and Fora and their documentation which introduce and define the concept of
network slicing.
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9 ETSI GR NFV-EVE 012 V3.1.1 (2017-12)
Table 4.2.1-1: Relevant external bodies' documents
External
Body Relation to NFV ISG
Title of Document Current Relation to
(Upstream, Area Scope support to Network
or Activity Status Network Slicing
User, or Slicing
Both)
Introduces network
slicing, named as
5G slicing in 5G
white paper, for
purposes of
flexibility,
High level 5G white paper
NGMN 5G white paper Published management and
requirements from NGMN
orchestration.
Needs
standardization
phase to support
those motivations
and requirements.
NGMN white paper
White paper NGMN white
High level describing network
NGMN description of paper for Published
requirements slicing for service
network slicing network slicing
provider networks.
Generic
requirements for
Network slice
Applying SDN SDNizing SDN-based network
abstraction for
Architecture to 5G network slicing for 5G
ONF sustainability Published
Slicing (ONF slicing for 5G services including
and business
TR-526 [i.17]) services orchestration for
agility
holistic operations
[i.19].
Network architecture
including network
entity and UE. Key
issues identified by
3GPP SA2 to
address network
slicing selection,
Study on isolation, roaming
Architecture for Network slice and security as well
High level
3GPP SA2 Next Generation related Published as some examples.
requirements
System (3GPP functionality 3GPP SA2 specifies
TR 23.799 [i.29]) network slicing
concept and
network architecture
and does not have
direct relation to
virtualisation and
MANO work in ISG
NFV.
Definition,
identification,
selection,
subscription,
configuration and
storage aspects of
System network slicing.
Network slice
Architecture for the Architectural Work in High level
3GPP SA2 related
5G System (3GPP requirements progress functionality for
functionality
TS 23.501 [i.30]) network slicing, and
network slicing
supported by the
architecture
including roaming
and non-roaming
scenarios.
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10 ETSI GR NFV-EVE 012 V3.1.1 (2017-12)
External
Body Relation to NFV ISG
Title of Document Current Relation to
(Upstream, Area Scope support to Network
or Activity Status Network Slicing
User, or Slicing
Both)
Procedures
Procedures
description and
Procedures for the and flows of Network slice
Work in aspects of
3GPP SA2 5G System (3GPP the related
progress supporting network
TS 23.502 [i.31]) architectural procedures
slicing in the 5G
elements
system.
Study work in 3GPP
Study on the
SA3 including
security aspects of
High level Network slice Work in security areas and
3GPP SA3 the next generation
requirements related security progress high level security
system (3GPP
requirements related
TR 33.899 [i.32])
to network slicing.
May be relevant to
Study on Study work in 3GPP
ETSI
management and SA5 on
GS NFV-IFA 008 [i.25],
orchestration of High level Network slice management and
3GPP SA5 Published ETSI
network slicing requirements management orchestration of
GS NFV-IFA 013 [i.6],
(3GPP network slicing in
and ETSI
TR 28.801 [i.21]) mobile networks.
GS NFV-IFA 014 [i.7].
Work item in 3GPP
SA5 on network
Provisioning of Detailed
s
...