Geography-informed energy conservation for Ad Hoc routing
Proceedings of the 7th annual international conference on Mobile computing and networking
Wireless sensor networks for habitat monitoring
WSNA '02 Proceedings of the 1st ACM international workshop on Wireless sensor networks and applications
Robust Positioning Algorithms for Distributed Ad-Hoc Wireless Sensor Networks
ATEC '02 Proceedings of the General Track of the annual conference on USENIX Annual Technical Conference
GPS-Free Positioning in Mobile ad-hoc Networks
HICSS '01 Proceedings of the 34th Annual Hawaii International Conference on System Sciences ( HICSS-34)-Volume 9 - Volume 9
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Location information is crucial for many applications of sensor networks to fulfill their functions. A mobile sensor network is comprised of both mobile and stationary sensors. So far little work has been done to tackle the mobility of sensors in localization for sensor networks. In this paper, we propose the QoL-guided distributed refinements for anchor-free localization in wireless mobile sensor networks. Accuracy is the core concern for localization. We introduce the important concept of Quality of Localization (QoL) to indicate the accuracy of a computed location for a specific sensor node. Our approach is divided into two phases. In Phase one, we propose the algorithm QoL-guided spreading localization with refinements to compute locations for sensor nodes right after the deployment of the sensor network when the mobile sensors are required to stay static temporarily. In Phase two, the non-movement restriction is released and we propose the mobile location self-updating algorithm to update locations of mobile sensors regularly or on demand. Extensive simulations are conducted, which demonstrate that our approach is a promising technique for localization in wireless mobile sensor networks.