02-06-2012, 05:02 PM
Energy Efficient Scheduling for Low Rate Wireless Sensor Networks
[attachment=24054]
INTRODUCTION
To improve the functionality and efficiency of industrial monitoring and control systems, the industries are looking toward Wireless Sensor Networks (WSNs) to provide sensing and actuating in hazardous and previously hard-to-reach areas] where very specialized and costly procedures must be adhered.
Timeliness and energy efficiency are important requirements to be fulfilled in these systems. The use of WSNs in control applications has many advantages compared to wired solutions, which are dominant at the moment. WSNs may be installed for a fraction of the cost and time of an existing wired network. Since the wireless nodes are usually battery-powered, the network can be effectively used in environments where electricity is not available or some level of mobility is required (e.g., rotating parts of machines).
PROBLEM FORMULATION
The sensing field is a flat 2-D plane of wxd square meters. The target of interest that is considered in this paper is a kind of a point-source phenomenon. The target is moving at a constant velocity of s meters per round horizontally across the sensing field. To imitate a rare target, at any particular instance, only one target will appear in the sensing field.
CONCLUSION
The proposed scheme is very suitable for rare and slow target tracking applications where saving energy is crucial. The performance of the proposed scheme is only mildly affected by the network size. The analysis of parameters shows that for specific applications, the performance can be further biased to have either a higher target-detection capability or lower energy consumption by tuning some parameters.
[attachment=24054]
INTRODUCTION
To improve the functionality and efficiency of industrial monitoring and control systems, the industries are looking toward Wireless Sensor Networks (WSNs) to provide sensing and actuating in hazardous and previously hard-to-reach areas] where very specialized and costly procedures must be adhered.
Timeliness and energy efficiency are important requirements to be fulfilled in these systems. The use of WSNs in control applications has many advantages compared to wired solutions, which are dominant at the moment. WSNs may be installed for a fraction of the cost and time of an existing wired network. Since the wireless nodes are usually battery-powered, the network can be effectively used in environments where electricity is not available or some level of mobility is required (e.g., rotating parts of machines).
PROBLEM FORMULATION
The sensing field is a flat 2-D plane of wxd square meters. The target of interest that is considered in this paper is a kind of a point-source phenomenon. The target is moving at a constant velocity of s meters per round horizontally across the sensing field. To imitate a rare target, at any particular instance, only one target will appear in the sensing field.
CONCLUSION
The proposed scheme is very suitable for rare and slow target tracking applications where saving energy is crucial. The performance of the proposed scheme is only mildly affected by the network size. The analysis of parameters shows that for specific applications, the performance can be further biased to have either a higher target-detection capability or lower energy consumption by tuning some parameters.