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Reliable Sensor Networks for Planet Exploration


Wireless sensor networks will play a critical role in space and planet exploration, allowing remote monitoring of noneasily accessible areas in preparation OF human or robotic missions. Sensors, however, are fragile and can fail, reporting erroneous measutements, for example. Decisions derived from flawed sensor measurements can adversely impact the correctness of the overall sensor network findings and may jeopardize the success of the mission. Unfortunately, failed sensors in space cannot be easily diagnosed and replaced. To improve the reliability of decisions and minimize the impact of fadty sensor measurements, the preferred approach is to exploit data redundancy. In this paper, we present Confidence Weighted Voting (CWV), a distributed technique that can greatly improve the data reliability and fault tolerance of sensor network applications. We evaluate CWV against traditional approaches (e.g., Mdority Voting (MV) and Distance Weighted Voting 0 1 , in the presence of fllwed sensors. The results show that CWV consistently outperform the other schemes by providing as much as 4940 more r~siliency.

Paper: PDF file of paper

Information & Date

The 2005 IEEE International Conference On Networking, Sensing and Control (ICNSC 2005), Tucson, USA, March. 2005


Tony Sun
Ling-Jyh Chen
Chih-Chieh Han
Mario Gerla