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
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