Next Article in Journal
Simulation of EO-1 Hyperion Data from ALI Multispectral Data Based on the Spectral Reconstruction Approach
Previous Article in Journal
Application of Neurocomputing for Data Approximation and Classification in Wireless Sensor Networks
Open AccessArticle

Networked Estimation for Event-Based Sampling Systems with Packet Dropouts

Department of Electrical Engineering, University of Ulsan, Namgu, Ulsan 680-749, Korea
*
Author to whom correspondence should be addressed.
Sensors 2009, 9(4), 3078-3089; https://doi.org/10.3390/s90403078
Received: 23 March 2009 / Revised: 21 April 2009 / Accepted: 24 April 2009 / Published: 24 April 2009
(This article belongs to the Section Chemical Sensors)
This paper is concerned with a networked estimation problem in which sensor data are transmitted over the network. In the event-based sampling scheme known as level-crossing or send-on-delta (SOD), sensor data are transmitted to the estimator node if the difference between the current sensor value and the last transmitted one is greater than a given threshold. Event-based sampling has been shown to be more efficient than the time-triggered one in some situations, especially in network bandwidth improvement. However, it cannot detect packet dropout situations because data transmission and reception do not use a periodical time-stamp mechanism as found in time-triggered sampling systems. Motivated by this issue, we propose a modified event-based sampling scheme called modified SOD in which sensor data are sent when either the change of sensor output exceeds a given threshold or the time elapses more than a given interval. Through simulation results, we show that the proposed modified SOD sampling significantly improves estimation performance when packet dropouts happen. View Full-Text
Keywords: Networked estimation; event-based sampling; send-on-delta; packet dropout Networked estimation; event-based sampling; send-on-delta; packet dropout
Show Figures

Graphical abstract

MDPI and ACS Style

Nguyen, V.H.; Suh, Y.S. Networked Estimation for Event-Based Sampling Systems with Packet Dropouts. Sensors 2009, 9, 3078-3089.

Show more citation formats Show less citations formats

Article Access Map by Country/Region

1
Only visits after 24 November 2015 are recorded.
Search more from Scilit
 
Search
Back to TopTop