Abstract
Localization technology for Underwater Wireless Sensor Networks (UWSNs) plays an important role in detection and navigation for underwater vehicles. In this paper, we therefore propose a novel localization scheme for UWSNs based on the propagation loss, named Communication Signal Propagation Loss Localization Scheme (CSPLLS). CSPLLS is a cooperative, passive, asynchronously distributed localization method where the target only uses communication signal’s strength from anchor nodes. The method is appropriate for a long-distance and large-scale positioning in shallow sea. Main innovative point of the research is to locate with a new rang-based method using signal propagation loss. Experiment and simulation results are presented in the paper which confirms that the proposed scheme provides a relatively high precision of as low as 2.2% positioning error with centroid optimization. Major advantages of this method includes: 1) getting rid of clock resources usually used in each node for localization, 2) reducing the total localization time, 3) saving the energy of each node which prolongs the lifetime of networks and 4) realize the design of underwater communication and localization integration.
Highlights
Underwater positioning or localization plays an important role in underwater wireless sensor networks (UWSN) [1]
We propose and design a localization scheme based on communication signal propagation loss (Figure 2)
Focusing on the propagation loss measurement error caused by each anchor node, a centroid optimized Communication Signal Propagation Loss Localization Scheme (CSPLLS) is proposed
Summary
Underwater positioning or localization plays an important role in underwater wireless sensor networks (UWSN) [1]. With the advancement of technology, underwater exploration and development, UWSNs are growing bigger and bigger [2]. Autonomous underwater vehicles (AUVs) and unmanned underwater vehicles (UUVs) are playing important role in underwater exploration and monitoring [3], [4]. With such growing applications, it becomes really important to have efficient, accurate and low power localization schemes [5], [6]. A poor localization scheme can highly risk underwater wireless sensor networks performance and may lead to failure of the target goals.
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