Latency‐Aware Proactive Event Monitoring Scheme in SDN/P4‐Based IoT Networks

The combination of control plane flexibility and data plane programmability enables the emergence of groundbreaking features in network systems. One of the key advancements is the provision of new network monitoring capabilities. This innovation has the potential to meet diverse demands arising from unique characteristics and specific requirements of certain network infrastructures, such as the Internet of Things (IoT). However, existing monitoring approaches primarily focus on assessing the overall network condition and lack the capability to accurately analyze specific target events. This presents a significant challenge for network management, where identifying and tracking critical events is a fundamental requirement. To address this limitation, this paper proposes a latency‐aware proactive event monitoring (LPEM) scheme, a novel monitoring mechanism tailored to IoT requirements. LPEM leverages the programmable features of software‐defined networking (SDN) and Programming Protocol‐Independent Packet Processors (P4) to identify specified events and proactively report relevant information to a controller. This enables the controller to track specific events while simultaneously monitoring the network latency they experience in the network. Measurement results demonstrate that LPEM effectively tracks target events and monitors their experienced link latency, regardless of variations in network traffic. Furthermore, LPEM enables real‐time monitoring with millisecond‐level response times and enhances monitoring reliability by addressing both the loss of monitoring data and unexpected events.