Che cos'è il TSN (Time-Sensitive Networking)? Il futuro dell'Ethernet industriale

The Problem TSN Solves

Traditional industrial Ethernet protocols (PROFINET, EtherCAT) achieve real-time determinism by running on dedicated, isolated networks, separate from the IT Ethernet network. This means factories operate two parallel networks: one for OT control traffic, one for IT data traffic. This duplication is expensive, complex, and a barrier to IT/OT convergence for IIoT and Industry 4.0 initiatives.

What TSN Adds to Standard Ethernet

• IEEE 802.1AS (gPTP), sub-microsecond clock synchronisation across all network nodes
• IEEE 802.1Qbv (TAS), time-aware shaper schedules transmission windows for real-time traffic, preventing IT traffic from delaying control frames
• IEEE 802.1Qbu (Frame Preemption), allows a high-priority control frame to interrupt a low-priority IT data frame mid-transmission
• IEEE 802.1CB (FRER), frame replication and elimination for redundancy

TSN Benefits for Industrial Automation

• Single converged network for both OT and IT traffic, lower infrastructure cost
• Deterministic control performance (sub-millisecond cycle times) over standard Ethernet
• Easier integration of IIoT data collection with real-time control
• Supports OPC UA over TSN, the emerging unified architecture for IIoT

TSN Adoption Timeline

TSN is being adopted by all major automation vendors, Siemens, Rockwell, Beckhoff, and Bosch Rexroth all have TSN roadmaps. Industrial switching and embedded computing hardware with TSN-capable Intel i210/i225 Ethernet controllers (available on Avalue platforms) will be the foundation of next-generation smart factory networks.