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Mission Statement:

This Work Area focuses on the introduction of Software Defined Networking (SDN) and Network Functions Virtualization (NFV), including migration and coexistence of physical and virtual elements, into the broadband network.  Activities work with and coordinate with Open Broadband (OB) program regarding open source e.g. Open Broadband-Broadband Access Abstraction (OB-BAA) and testing Open Broadband Laboratories (OBLs). These activities demonstrate how standards organizations and open source projects can collaborate.

Work Area Directors: Christopher Croot, BT and George Dobrowski

Business Impact:

The migration to SDN and NFV in the broadband network facilitates agile deployment of new customized distributed broadband services and applications. This enables new revenues and provider differentiation while managing OpEx both in the access network and in single and multi-tenant residential and business locations.


The scope includes migration to and deployment of SDN- and NFV-enabled implementations across all aspects of the broadband network. Building on the initial architectural definition of and extensions to the BNG framework has led to new definition and requirements for Cloud-based Central Office (CloudCO).   It provides architectural cornerstone for next generation broadband networking with dis-aggregation of functions which enable changes to the traditional boundary of a Central Office.  The set of deliverables below build on CloudCO addressing migration, new Access Nodes, and automated intelligent management.

SDN and NFV Work Area Email Lists

See also:

Project Streams

Project Stream


PS Leadership

Non-PS Assigned

Projects that don’t fit under the scope of an existing Project Stream or if they fit under the scope of more than one Project Stream, are developed under the Non-PS Assigned category. 

George Dobrowski , Distinguished Fellow

Christopher Croot, BT

Project Stream
DescriptionPS Leadership
Cloud in the Central Office
Cloud CO)

This project stream is developing a next generation Central Office (CO) System that is part of BBF Open Broadband, which incorporates Software Defined Networking and Network Function Virtualization with SDN control & management running on a cloud-like infrastructure deployed at Central Offices.

By ‘cloud-like’, it is meant that the infrastructure leverages commodity network switches and commodity compute nodes with virtualization software to host various virtualized network functions (VNFs). Infrastructure operators can offer these functions to 3rd parties and 3rd party network functions can be inserted into the platform, allowing Value Added Services.

The goal of this project is building on the architectural framework for such a Cloud CO (TR-384), with appropriate abstracted functional modules, and interfaces, eventual API and protocol choices and/or definitions. The architectural framework allows interconnecting these functional modules in an interoperable manner.  A secondary goal is to figure out and shows how standards organizations and open source projects can collaborate. 

This project will also establish a reference implementation of the Cloud CO framework, creating a platform for innovation and potential open source upstreaming into other organizations, as well as a platform for industry interoperability testing (OBL) and certification of NFs and the components that implement the aforementioned functional modules.

Yves Hertoghs, VMWare
Ning Zong, Huawei Technologies

Project Stream
DescriptionPS Leadership
Fixed Access Network Sharing (FANS)

FTTx represents today a high-cost technology (in terms of Return on Investments) to enhance data rates to the end customers, but it requires a huge effort, in terms of CAPEX and OPEX for access network deployment. Due to this, some operators have recognized the need to partner in order to improve the return on investment of FTTx deployment.

Sharing the access network infrastructure is a viable way to expand the network and achieve an effective roll-out of new technologies.

FANS delivers one network sharing model with high flexibility for forward looking broadband network deployments and operations, facilitating the business innovation, enhancing the network efficiency and improving customer experience.

FANS also addresses the virtualization of that shared infrastructure such that each operator could have their own virtual access node.

Bruno Cornaglia,  Vodafone

Project StreamDescriptionPS Leadership
Automated Intelligent Management (AIM)To construct access and home networks with automation and intelligence, to achieve higher O&M efficiency and lower OPEX.

Wei Lin, Huawei Technologies

SDN and NFV Projects in Progress

Non-PS Assigned Projects
Related Contributions


Metro Computing Network (MCN)

This project will explore possible network innovation regarding the edge computing era. The goal is to consider study the Edge Computing impacts on multi-service broadband network.

JIRA contributions

CloudCo Projects
Related Contributions


CloudCO migration and co-existence

The purpose of this project is to suggest methods by which a existing/legacy broadband network may gradually migrate to one based on CloudCO and/or coexistence of the legacy and CloudCO architecture within segments of the same network.

JIRA contributions
WT-411Definition of interfaces between Cloud CO Functional ModulesThis work will define the Interfaces between the Functional Modules in the Cloud CO Architectural Framework, as well as the Cloud CO Northbound API.  Network Transport Protocols will be defined to carry the interface attributes. Furthermore the data models, schemas or APIs that are signaled across them will be defined as well.  Existing Open Interface works, as described in Standards and Open Source work will be leveraged as much as possible.  This project is based on and will grow incrementally, driven by a series of Cloud CO Application Notes (APPNs).  Cloud CO Application Notes will detail how a certain service is instantiated, maintained and consumed across the Cloud CO Architecture and will detail the necessary interactions between the different Functional Modules in the Architectural Framework, as well as the interactions with the Cloud CO Northbound API in order to achieve the necessary end result.JIRA contributions

Wei Lin, Huawei Technologies

Dharma Rajan, VMware

WT-412Test Cases for Cloud CO ApplicationsThis work will define Test Cases for Cloud CO Applications.  Cloud CO scenarios are described in Cloud CO Application Notes as well as TR-416.  The Cloud CO Application Notes will detail how a certain service is instantiated, maintained and consumed across the Cloud CO Architecture.  The Test Cases will be consumed by the Open Broadband Labs (OBLs), effectively validating the Cloud CO Application Note.  The development of WT-411 Interfaces, WT-412 Testing and Application Notes are inter-dependent.JIRA contributions
WT-413SDN Management and Control Interfaces for CloudCO Network Functions

In the Cloud CO context, WT-413 specifies the management and control framework of Network Functions and a formalism to specify their NBIs to identify the supported macro functionalities and link them to existing/to-be YANG DMs. This work primarily enables the migration from SNMP/MIB towards NETCONF/YANG interfaces and potentially other protocols to exercise not only traditional FCAPS management functions but also fine grained flow control across VNFs and PNFs network service graphs. This is a key step towards Software Networking introduction and in turn the automation and Orchestration of PNFs and VNFs in a Cloud CO type of architecture.

The development of this Working Text shall also shape the thinking on the way Cloud CO interfaces, especially for VNFs, are modeled and the opportunity to reuse/extend existing YANG work for that.

JIRA contributions

Georgios Karagiannis, Huawei Technologies

Mauro Tilocca, Telecom Italia S.p.A

WT-435NETCONF requirements for Access Nodes and Broadband Access AbstractionThis project will develop the NETCONF requirements for the NETCONF/YANG Northbound interfaces (NBIs) of Access Physical Network Functions (PNFs) and the CloudCO BAA layer towards the Management and Control (M&C) elements that interact with them.Jira contributions

Duane Remein

Huawei Technologies


WT-451vOMCI Interface Specification

The scope is to standardize the NBI and SBI of vOMCI function. The vOMCI function may support other administrative interfaces to modules (e.g., logging) to support non-OMCI related features, standardizing these interfaces are beyond the scope of this document.   The vOMCI function is responsible for:

  • Receiving service configurations from the vOLT Management function
  • Translating the received configurations into G.988 OMCI management entities (ME) and formatting them into OMCI messages
  • Encapsulating and sending above formatted OMCI messages through the OLT to the attached ONU
  • Translating the received ONU’s operational data from the OLT and sending it to the vOLT Management function

The OLT then would be responsible for:

  • Transparently sending OMCI messages received from vOMCI function, to the correct ONU using the PON OMCI channel
  • Encapsulating received OMCI messages from the ONU and sending it to the vOMCI function
Jira contributions

Tim CareyNokia

Zhang Dechao ChinaMobile

WT-454YANG Modules for Access Network Map & Equipment Inventory

In a CloudCO architecture, the management of physical nodes requires interfaces to expose Access Network Map (ANM) and Equipment Inventory information to the SDN Management and Control and other CloudCO functional blocks. For the support of multiple tenants, it’s also useful to expose to Tenants only relevant ANM and Equipment Inventory information over the NB API.

The project is defining YANG data models for ANM and Equipment Inventory applicable to the BAA layer and the Access SDN Management and Control.

Jira contributions

Yang Wenle  Huawei Technologies

                                        Jie Chen 


Application Notes

Application Notes (APPN) use the TR-384 framework to describe an implementable Use Case for a CloudCO 'application'.  APPN includes

  • Assumptions and Preconditions
  • System Description using TR-384 framework (components) + Drawing
  • Description of Actors
  • Interactions, which describe what information gets exchanged between the TR-384 functional elements and what happens as a result after an actor performs an 'action' i.e an API call at the CCO NB API or a user plane packet that enters the system.  A ladder diagram shows the various interactions between the functional elements.
  • Success Criteria for the interactions
  • Various instances can be instantiated which detail a given implementation of the individual components 

An Application Note Instance will then be created that details the exact components to be bootstrapped/installed onto an NFVI. ((i.e. it describes what VIM is chosen, etc, as well as e.g software releases etc).  The APPN is then used to guide development of:

  • Interface Descriptions (WT-411)
  • Test Case Descriptions (WT-412)
Application Notes Under Development

Application Notes and how they relate to other work

Coordinated by PSLs:

Yves Hertoghs, VMWare
Ning Zong, Huawei Technologies

FANS Projects
Related Contributions
WT-370 Issue 2Fixed Access Network Sharing – Architecture and Nodal Requirements

This Technical Report specifies technical aspects associated with Fixed Access Network Sharing (FANS) that involve the access network (including access nodes and aggregation nodes). It focuses on the cases of Passive Optical Network (PON) and DSL and G. fast access technologies.

Jira ContributionsBruno Cornaglia
SDN AIM Projects
Related Contributions

Access & Home Network O&M Automation/Intelligence

Over the past decade, growth in the Telco industry’s revenue has never outpaced growth in OPEX. As the scale of a network increases, OPEX increases with it. Therefore, it is expected that work needs to be done in order to reduce OPEX. 

This project will specify the logical framework of access & home network O&M automation, including necessary functional blocks, logical connection descriptions and information flows between the modules. In addition, this work will suggest possible applications of this framework to typical BBF service architectures.

This identifies the information elements required in access & home network O&M automation, key use cases and KPIs, and analysis of the gaps with existing architectures to support these information elements. The project will describe what kinds of the information elements are required.

Jira Contributions