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ISRN Sensor Networks
Volume 2013 (2013), Article ID 185719, 6 pages
Research Article

QC2: A QoS Control Scheme with Quick Convergence in Wireless Sensor Networks

Department of Computer Science and Information Engineering, National Chiayi University, Chiayi 60004, Taiwan

Received 5 December 2012; Accepted 10 February 2013

Academic Editors: I. Khalil and A. Olteanu

Copyright © 2013 Hao-Li Wang and Wei-Lun Hung. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


In wireless sensor networks, too many or too few power-on sensors may cause the waste of resources or poor sensing efficiency; thus, controlling the number of active sensors to meet the predicted target number is the purpose of this research. However, the total number of sensors may be unstable because of the increment and damage to the sensors. It is difficult to control the number of active sensors to meet the predicted target in this condition. Previous studies proposed the Gur Game algorithm to solve this problem. However, the convergence time of the Gur Game algorithm is too long, which causes sensors to consume excessive power and waste resources. Therefore, this paper proposed the QoS Control with Quick Convergence (QC2). This method utilizes total virtual value to accelerate the convergence operation from the number of sensors to the target number. The experiment result shows that the QC2 method can cause the number of sensors to converge rapidly with the target value and that QC2 can be over a hundred times faster than the Gur Game algorithm with regard to convergence.