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Adaptive Link Quality Estimation in Wireless Sensor Networks  

Lee, Jung-Wook (광운대학교 전자통신공학과)
Chung, Kwang-Sue (광운대학교 전자통신공학과)
Publication Information
Journal of KIISE:Computing Practices and Letters / v.16, no.11, 2010 , pp. 1081-1085 More about this Journal
Abstract
In the wireless sensor networks, power consumption and interference among the nodes can be reduced by using the transmission power control. Because link quality is changed by spatial and temporal effect, link failures are frequently occurred. In order to adapt to link quality variation, existing transmission power control schemes broadcast beacon messages periodically to neighbor nodes and control the transmission power dynamically. However, it can effect on the time and energy overhead according to period of transmission power control. In this paper, the dynamic method of transmission power control by the link quality variation and variable period are proposed. When a link quality is unstable, the control duty cycle is reduced and the link quality is agilely maintained. In contrast, when link quality is stable, the control period is increased and control overhead is decreased.
Keywords
Sensor Networks; transmission power control period; Reliability; Energy Efficiency;
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