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Founded in November 2012, ETSI NFV ISG (Industry Specification Group) is responsible for the standards related to NFV. Since its inception, it has issued more than 100 documents, more than 300 members and 38 operators, including China Mobile. NFV ISG is divided into six working groups (TST,SOL,REL,IFA,EVE,SEC) according to the different contents of the work.

NFV ISG advances its work in a two-year phase (2-year phases). The documents published in the first phase (2013-2014) are considered to be pre-standard studies, sometimes mistakenly referred to as "Release 1". Two years later, in 2014, the NFV ISG community received unprecedented attention and decided to develop standards and specifications. The subsequent published standards are called "Release 2" and "Release 3". The Release 2 documentation ended in the third quarter of 2016, while work on Release 3 began.

The first important milestone of the ISG was the release of five documents in 2013, covering user scenarios (document NFV001), virtualization requirements (document NFV004), structural framework (document NFV002), and terminology (document NFV003). The fifth document defines the framework (NFV-PER002) as a key aspect of the collaborative public presentation PoC platform. In 2014, NFV ISG accelerated its pace and released 11 more documents.

The NFV structural framework defines each functional block and the main reference points between these functional blocks. These functional blocks are:

Virtual network function (VNF): in traditional non-virtual networks, the virtualization of a network function, such as EPC,MMEPGW,RGW,DHCP, etc.

L management element (EM): manages one or more VNF.

L NFV infrastructure (NFVI), including hardware and virtual resources and virtualization layer: all hardware and software components used to build an environment for VNF deployment, management, and operation.

L OSS/BSS: operator's operation management and business support system.

L MANO:NVF management and orchestration system. It includes NFV choreographer (NFVO), VNF Manager (VNFM), and Virtual Infrastructure Manager (VIM).

2015-2016 is the second working stage of NFV ISG. The document released during this phase is called "Release 2" as part of the second phase, and NVF ISG defines the functional requirements for VIM,VNFM and NFVO, as well as the requirements for reference points. In addition, a series of specifications for requirements, interfaces, and information models are defined, with excerpts as follows:

Management of virtualized resources (IFA 005, IFA 006, and IFA 010)

Virtualized resources information management (IFA 005, IFA 006, and IFA 010)

Fault and performance management of virtualised resources (IFA 005, IFA 006, and IFA 010)

Lifecycle management of VNFs (IFA 007, IFA 008, IFA 010, SOL 002, and SOL 003)

Fault, configuration and performance management of VNFs (IFA 007, IFA 008, IFA 010, SOL 002, and SOL 003)

Lifecycle management of Network Services (IFA 010, and IFA 013)

Fault and performance management of Network Services (IFA 010, and IFA 013)

Package and software image management (IFA 005, IFA 006, IFA 007, IFA 010, IFA 011, IFA 013, and SOL 003)

VNF Descriptor-VNF information modelling (IFA 011, and SOL 001)

Network Service descriptors-NS information modelling (IFA 014, and SOL 001)

Virtualised resources capacity management (IFA 0.05, and IFA 010)

Hardware-independent acceleration (IFA 002, IFA 003, IFA 004, and IFA 010)

A UML Information Model (IFA 015) that consolidates the Information Elements developed in all other reference points specs (IFA004 to 008 and IFA011 to 14)

Information modelling guidelines (IFA 016, IFA 017)

2017-2018 is the third phase of the work. The work of "Release 3 Definition" will be announced in the coming months, according to its website. Some of the ongoing and independent releases include:

Information modelling (IFA 016, IFA 017 and IFA 024)

End-to-end multi-site services management (IFA 022)

Additional considerations on management and orchestration (IFA 020, IFA 021 and EVE 009)

Acceleration technologies (IFA 018 and IFA 019)

Charging, billing and accounting (EVE 008)

License management (EVE 010)

Security analysis and management (SEC 013, SEC 014)

Reliability and availability considerations (REL 007, REL 008)

DevOps and continuous integration (TST 006)

Testing (TST 004, TST 007)

Policy management (IFA 023)

Identification of "Touchpoints" with information Models of other organizations (IFA 024)

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