Wireless solutions are often thought to be tainted by susceptibility to interference and lack of reliability. Despite recent technical improvements, wireless transmission technology still elicits concern when mission-critical processes have to be controlled or monitored via WLAN connections. However, the robustness, reliability and availability of wireless connections can be increased dramatically by using standards-based redundancy techniques, such as Parallel Redundancy Protocol (PRP). This article describes the basic technical principles, requirements and application scenarios for the application of PRP in WLAN networks.
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