| Author(s): | Phoebus Wei-Chih Chen, Chithrupa Ramesh, and Karl H. Johansson |
|---|---|
| Status: | Appears in the 18th World Congress of the International Federation of Automatic Control (IFAC), Milan, Italy, August/September 2011. |
| Keywords: | Control and estimation with data loss, Networked embedded control systems, Stochastic control |
Abstract
Much of the current theory of networked control systems uses simple point-to-point communication models as an abstraction of the underlying network. As a result, the controller has very limited information on the network conditions and performs suboptimally. This work models the underlying wireless multihop mesh network as a graph of links with transmission success probabilities, and uses a recursive Bayesian estimator to provide packet delivery predictions to the controller. The predictions are a joint probability distribution on future packet delivery sequences, and thus capture correlations between successive packet deliveries. We look at finite horizon LQG control over a lossy actuation channel and a perfect sensing channel, both without delay, to study how the controller can compensate for predicted network outages.
Conference Paper (pdf)
An expanded version of this paper was submitted as a KTH technical report.
A poster of this work was presented at the ACCESS Linnaeus Center Scientific Advisory Board Meeting at Villa Pauli near Stockholm, Sweden on May 3, 2011 (pdf).
Text citation
Phoebus Chen, Chithrupa Ramesh, and Karl H. Johansson, Network estimation and packet delivery prediction for control over wireless mesh networks, in Proceedings of the 18th World Congress of the International Federation of Automatic Control (IFAC), August, September 2011.
BibTeX entry
@InProceedings { chen-ifac:2011,
author = {Phoebus Chen and Chithrupa Ramesh and Karl
H. Johansson},
title = {Network Estimation and Packet Delivery Prediction
for Control over Wireless Mesh Networks},
booktitle = {Proceedings of the 18th World Congress of the
International Federation of Automatic Control
({IFAC})},
month = {August--September},
year = {2011},
location = {Milan, Italy},
}