Parameter Self-Configuration and Self-Adaptation in Industrial Wireless Sensor-Actuator Networks

摘要

Wireless Sensor-Actuator Network (WSAN) technology is gaining rapid adoption in process industries in recent years. A WSAN typically connects sensors, actuators, and controllers in industrial facilities, such as steel mills, oil refineries, chemical plants, and infrastructures implementing complex monitoring and control processes. IEEE 802.15.4 based WSANs operate at low-power and can be manufactured inexpensively, which make them ideal where battery lifetime and costs are important. Recent studies have shown that the selection of network parameters has a significant effect on the network performance. However, the current practice of parameter selection is largely based on experience and rules of thumb involving a coarse-grained analysis of expected network load and dynamics or measurements during a few field trials, resulting in non-optimal decisions in many cases. In this work, we develop the Parameter Selection and Adaptation FramEwork (P-SAFE) that optimally configures the network parameters based on the application Quality of Service (QoS) demand and adapts the configuration at runtime to consistently satisfy the dynamic requirements. We implement P-SAFE and evaluate it on three physical testbeds. Experimental results show our solution can significantly better meet the application QoS demand compared to the state of the art.