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Optimizing SCADA Communications: UDP vs. TCP for Cellular Networks
This white paper examines the challenges of using TCP/IP versus UDP/IP for DNP3-based SCADA communications over cellular networks. A real-world case study demonstrates how switching from TCP to UDP resolved persistent connectivity and latency issues, resulting in reliable, efficient remote voltage monitoring.
Key topics include:
- Introduction to TCP/IP and UDP/IP
- Case Study: SCADA and Boomerang Devices
- TCP/IP Wired vs. Cellular Wireless
- Protocol Timing and DNP3 Interactions
- Requirements and Performance Metrics
- Transition to UDP/IP
- Results and Observations
Why utilities should care:
Cellular network characteristics can undermine traditional TCP/IP reliability, causing delays and connection failures. Adopting UDP/IP for DNP3 traffic reduces protocol overhead, improves device availability, and ensures efficient, robust remote monitoring.
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