Connectivity Framework Contents
FIGURES
Figure 1-1: Connectivity is a crosscutting function in the Industrial Internet Reference Architecture. It provides the ability to exchange data between participants within and across functional domains( control, operations, information, applications, business)........................................ 8
Figure 1-2: Scope of the Connectivity as a crosscutting function within the IIoT Reference Architecture. Connectivity provides the data sharing mechanisms for the higher-level functions, including“ Distributed Data Interoperability and Management”. The“ neck” of the hourglass represents the“ Internet” network layer, common across industries. This document focuses on the connectivity layers above the neck............................................................................. 10
Figure 1-3: IIC Technical Publication Organization................................................................................... 13
Figure 2-1: Industrial Internet Connectivity Stack Model. Each layer builds on the capabilities provided by the layer below. The‘ Connectivity Framework’ layer provides data sharing mechanisms among participants. The‘ Distributed Data Interoperability and Management’ layer relies on the mechanisms provided by the‘ Connectivity Framework’ layer to provide meaningful information sharing................................................................................................................ 14
Figure 2-2: The focus of this document is on connectivity layers above the network layer, namely the connectivity transport and the connectivity framework layers............................................. 15
Figure 2-3: Connectivity protection building blocks described in the Industrial Internet Security Framework.............................................................................................................................. 19
Figure 3-1: The fundamental N ²( N-squared) IIoT connectivity challenge. Each new connectivity technology requires building a bridge to all the existing connectivity technologies, in order to facilitate information exchange between endpoints in different connectivity technologies. This approach does not scale beyond a few( small N) technologies, and results in information silos................................................................................................................. 21
Figure 3-2: Connectivity Gateway Concept. A connectivity core standard technology( baseline) is one that can satisfy all of the connectivity requirements for a functional domain. Gateways provide two functions( 1) integrate other connectivity technologies used within a functional domain,( 2) interface with connectivity core standards in other functional domains........... 22
Figure 3-3: A standardized gateway between core connectivity standards can allow domain-specific endpoints connected to one core standard to communicate with domain-specific endpoints integrated over another core standard.................................................................................. 24
Figure 3-4: Each core connectivity standard requires a standardized gateway to all other core standards. Each additional core standard creates increasing complexity and interoperability challenges. By restricting the design to a few core connectivity standards, we cover the needs of IIoT systems across the functional domains, and attain the goal of horizontal interoperability across industries........................................................................................... 24
Figure 4-1: Connectivity framework layer functions................................................................................ 27 Figure 5-1: Connectivity transport layer functions................................................................................... 38
IIC: PUB: G5: V1.0: PB: 20170228- vi-