IIoT connectivity framework standards facilitate logical data exchange services among participating devices in real time. Connectivity framework standards need to support secure data exchange with low latency and jitter, hardware and transport layer agnostic performance, efficient device discovery and authentication, and interoperability with legacy fieldbus and other open standards.
Two predominant data exchange patterns in IIoT data communication are publish-subscribe and request-response. In publish-subscribe mode, an application publishes data on well-known topics, independent of its consumers or subscribers, while applications that subscribe to the well-known topic are agnostic of publishers. This provides loose coupling between participating endpoints, where an endpoint may operate as a publisher, a subscriber, or both. In the request-response data exchange pattern (also known as the client-server pattern), requestors (clients) initiate a service request...
