A Scalable and Efficient Approach to Obtain Measurements in CAN-based Control Systems
Ref: HURRAY-TR-061102 Publication Date: May 2008
A Scalable and Efficient Approach to Obtain Measurements in CAN-based Control SystemsRef: HURRAY-TR-061102 Publication Date: May 2008
The availability of small inexpensive sensor elements enables the employment of large wired or wireless sensor networks for feeding control systems. Unfortunately, the need to transmit a large number of sensor measurements over a network negatively affects the timing parameters of the control loop. This paper presents a solution to this problem by representing sensor measurements with an approximate representation - an interpolation of sensor measurements as a function of space coordinates. A priority-based medium access control (MAC) protocol is used to select the sensor messages with high information content. Thus, the information from a large number of sensor measurements is conveyed within a few messages. This approach greatly reduces the time for obtaining a snapshot of the environment state and therefore supports the real-time requirements of feedback control loops.
Published in IEEE Transactions on Industrial Informatics (TII), IEEE, Volume 4, Issue 2, pp 80-91.
Notes: This document was previously entitled "Using a Prioritized MAC Protocol to Efficiently Compute Aggregated Quantities in a Single Broadcast Domain"