Resilient Communication Protocols for Industrial IoT: Securing Cyber-Physical-Systems at Scale

Abstract

The Industrial Internet of Things (IIoT) and Cyber-Physical Systems (CPS) bring together computing, networking, and physical processes (PP) to automate, control and monitor industrial settings in real-time. By interconnecting sensors, actuators, controllers, and networks, IIoT and industrial CPS enhance efficiency, productivity, and operational resilience across manufacturing, energy, and transportation domains. This survey provides a comprehensive review of IIoT architectures, including communication protocols like LPWAN, WPAN, MQTT, CoAP, REST, XMPP, AMQP, WIFI, ZigBee, Bluetooth, Z-Wave, and Lora WAN, as well as associated security considerations. Key challenges such as standardization, interoperability, privacy, regulatory compliance, and cyber threats are analyzed. The survey further examines resilience mechanisms encompassing self-protecting, self-configuring, and self-healing strategies, supported by redundant nodes, traffic replication and splitting, and SDN/NFV-based virtual network management. Cross-layer approaches that leverage adaptive routing, quality of service, and fault-tolerant strategies are discussed to maintain reliable and secure operations in the face of failures or attacks. The insights presented aim to guide researchers and practitioners in designing robust, scalable, and resilient IIoT and CPS infrastructures.