ATS-DA: Adaptive Timeout Scheduling for Data Aggregation in Wireless Sensor Networks

  • Authors:
  • Jang Woon Baek;Young Jin Nam;Dae-Wha Seo

  • Affiliations:
  • School of Electrical Eng. & Computer Science, Kyungpook National University,;School of Computer & Information Technology, Daegu University,;School of Electrical Eng. & Computer Science, Kyungpook National University,

  • Venue:
  • Information Networking. Towards Ubiquitous Networking and Services
  • Year:
  • 2008

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Abstract

In wireless sensor networks, the timeout scheduling of data aggregation controls the time each sensor node has to wait to receive data from its child nodes. This paper proposes a new timeout scheduling scheme for data aggregation, the ATS-DA, which adaptively configures its length of timeout according to changing data patterns. The ATS-DA decreases the timeout when the variance of the received data (data variation) from children is lower than a pre-defined threshold because there are not any noticeable events, which reduces the consumed power and improves transmission latency. The ATS-DA, however, increases the timeout when data variation is more than the pre-defined threshold in order to fulfill more accurate data aggregation. Extensive simulation work under various workloads has revealed that ATS-DA not only enhances data accuracy by 33%, but also it improves power consumption and transmission latency by 5% and 58% respectively, as compared with the previous cascading timeout scheduling scheme.