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
IIC: PUB: G5: V1.0: PB: 20170228- 55-