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1. Introduction

Table of Contents

1.1 Overview

The Reference Model (RM) specifies a virtualisation technology agnostic (VM-based and container-based) cloud infrastructure abstraction and acts as a “catalogue” of the exposed infrastructure capabilities, resources, and interfaces required by the workloads.

The document starts from the abstract and as it progresses it increasingly gets into more details. It follows the traditional design process where you start from core principles, progress to abstract concepts and models, then finish with operational considerations, such as security and lifecycle management.

1.2 Scope

This Reference Model document focuses on identifying the abstractions, and associated concepts, that are needed to represent the cloud infrastructure. Figure 1-1 below highlights its scope in more details.

scope

Figure 1-1: Scope of Reference Model

This document specifies:

1.3 Principles

The Reference Model specifications conform with the overall principles defined in the preface chapter Cloud iNfrastructure Telco Taskforce.

1.4 Definitions/Terminology

To help guide the reader, a CNTT Terminology section in [Cloud iNfrastructure Telco Taskforce] provides an introduction to the main terms used within this document and throughout the project in general. These definitions are, with a few exceptions, based on the ETSI GR NFV 003 V1.5.1 (2020-01) definitions. In a few cases, they have been modified to avoid deployment technology dependencies only when it seems necessary to avoid confusion.

1.5 Abbreviations

| Term | Description | |—————-|—————————————————————————————————————————-| | CNTT | Cloud iNfrastructure Telco Taskforce |
| PRD | Permanent Reference Document | | RM | Reference Model |

1.6 References

|Ref | Doc Number |Title | |——–|————————|——————————————————————————————————————| | [1] | ETSI GR NFV 003 V1.5.1 | “Network Functions Virtualisation (NFV); Terminology for Main Concepts in NFV”, January 2020. Available at https://www.etsi.org/deliver/etsi_gr/NFV/001_099/003/01.05.01_60/gr_NFV003v010501p.pdf | | [2] | RFC 2119 | “Key words for use in RFCs to Indicate Requirement Levels”, S. Bradner, March 1997. Available at http://www.ietf.org/rfc/rfc2119.txt |

1.7 Conventions

“The key words “must”, “must not”, “required”, “shall”, “shall not”, “should”, “should not”, “recommended”, “may”, and “optional” in this document are to be interpreted as described in RFC2119 [2].”