Throughput analysis for error reduction in send-on-delta sampling strategies

Abstract

This paper uses send-on-delta (SoD) strategies to reduce the sampling error instead of reducing the amount of sent messages. For this purpose, we present a procedure that selects an appropriate delta value for a given mean transmission rate. Signals are then sampled using the send-on-delta strategy with the selected delta value. The amount of sent messages will be higher in time intervals where the signal changes fast, and lower in time intervals where the signal changes slow, but maintaining the mean transmission rate and reducing, if possible, the sampling error. The procedure has been implemented for two error-based send-on-delta strategies, and tested on three step response signals. Results show that the proposed procedure decreases significantly the sampling error compared to a conformant periodic transmission strategy.