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A TDMA Based Data Collection Scheme Considering the Variability of Data in Sensor Networks with Mobile Sink

이동 싱크 기반 센서 네트워크에서 데이터 변화율을 고려한 TDMA 기반 데이터 수집 기법

  • Received : 2010.05.10
  • Accepted : 2010.05.31
  • Published : 2010.08.28

Abstract

In data collection using a mobile sink, the time that sensor nodes are included in its communication radius is not uniform. The data collection schedule in non-uniform time is needed between a mobile sink and sensor nodes for efficient data collection. The existing data collection schemes using a mobile sink considered staying time in its communication range and data collected by the mobile sink. However, they did not consider the characteristics of data collected in sensor networks. In this paper, we propose a TDMA based schedule scheme that consists of the data collection period by each sensor nodes and the data collection period between a mobile sink and sensor nodes. Moreover, we propose a data collection scheme considering the variability of data in sensor networks. The proposed data collection scheme collects only data that changed larger than the threshold set by the user. In order to show the superiority of the proposed scheme, we compare it with DWEDF that aims to collect data uniformly. As a result, our experimental results show that the proposed scheme reduces about 23% energy consumption and the data collection failure of sensor nodes over the DWEDF.

Keywords

Sensor Network;Mobile Sink;Data Collection

Acknowledgement

Supported by : 한국연구재단

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