Connectivity Framework 8 : Core Connectivity Standards
8 CORE CONNECTIVITY STANDARDS
The assessment of the connectivity standards listed in chapter 7 confirms that not all of the connectivity standards need to support the applications across IIoT to the same degree . Some are more suited to one functional domain ( see Figure 1-1 ), while others are applicable across multiple functional domains . Some are vertically focused , specific to certain industries , while others are horizontally focused , and used in multiple industries .
The result of applying the connectivity core standards criteria ( see section 3.4 ) to the IIoT connectivity framework standards identified in chapter 7 is summarized in Table 8-1 .
|
Core Standard Criterion |
DDS |
Web Services |
OPC-UA |
oneM2M |
1 |
Provide syntactic interoperability # |
✓ |
Need XML or
JSON
|
✓ |
✓ |
2 |
Open standard with strong independent , international |
✓ |
✓ |
✓ |
✓ |
|
governance # |
|
|
|
|
3 |
Horizontal and neutral in its applicability across industries # |
✓ |
✓ |
✓ |
✓ |
4 |
Stable and deployed across multiple vertical industries # |
Software
Integration &
Autonomy
|
✓ |
Manufacturing |
Home
Automation
|
5
Have standards-defined Core Gateways to all other core connectivity standards #
Web Services , OPC-UA *, oneM2M *
DDS , OPC-UA , oneM2M
Web Services , DDS *, oneM2M *
Pub-Sub in development
Web Services , OPC-UA *, DDS *
6 |
Meet the connectivity framework functional requirements |
✓ |
� |
✓ |
7 |
Meet non-functional requirements of performance , scalability , reliability , resilience |
✓ |
� |
Real-time in development |
|
8 |
Meet security and safety requirements |
✓ |
✓ |
✓ |
✓ |
9 |
Not require any single component from any single vendor |
✓ |
✓ |
✓ |
✓ |
10 |
Have readily-available SDKs both commercial and open source |
✓ |
✓ |
✓ |
✓ |
Reports not yet documented or public
# green = Gating Criteria * = work in progress , ✓ = supported , � = not supported Table 8-1 : IIoT Connectivity Core Standards Criteria applied to key connectivity framework standards .
DDS is managed by the OMG , has an established standard gateway mapping to web services ( and many others ), was established in 2004 and is widely deployed in many types of systems in multiple industries . Standardized gateway mappings to OPC-UA and oneM2M are in development . DDS is suitable for multiple functional domains ( see Figure 1-1 ). It widely used in the control domain , and increasingly being used in the information , operation and business domains . Security is a recent addition to the specification , now nearing deployment . For more details on the applicability of DDS see the detailed assessment template mapping in Annex A .
Web Services using HTTP are important in any IIoT system , especially from the IT perspective . HTTP is managed by the IETF , has standard mappings to DDS , OPC-UA and oneM2M , and is well established and widely deployed across multiple industries . Web services are suitable for the application and business domains . Web services are typically used for administrative
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