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In this paper, we consider how to localize individual nodes in a wireless sensor network when some subset of the network nodes can be in motion at any given time. For situations in which it is not practical or cost-efficient to use GPS or anchor nodes, this paper proposes an Anchor-Free Mobile Geographic Distributed Localization (MGDL) algorithm for wireless sensor networks. Taking advantage of the...
The Wireless Sensor Networks (WSN) have distributed and embedded nature and they are characterized by strong interactions between their hardware and software parts, therefore, their specification is a complex task. Formal methods need strong skills in mathematics in order to model and analyze WSN applications. However, semi-formal methods are simple and easy to understand. Hence, most of approaches...
This paper is focused on the decentralized localization problem of mobile sensors in wireless sensor networks. Based on a combined localization technique, it uses accelerometer, gyroscope and fingerprinting information to solve the positioning issue. Using the sensors mobility, the proposed method computes first estimates of sensors positions. It then proceeds to a decentralized localization scheme,...
Localization is a fundamental problem in Wireless Sensor Networks (WSNs) and is more challenging than in the Static Sensor Networks in the result of location uncertainty caused by mobility of the sensor nodes. Existing range-free localization algorithms for WSNs are almost based on the sequential Monte Carlo Localization (MCL) algorithm. They either suffer from low sample efficiency or high communication-computation...
Wireless sensor networks have the potential to become the future pervasive sensing technology. Large number of sensors and the major application scenario require manual location that may cause sensor position variation problem However, we need mechanisms to localize sensors randomly and control the correspondent movement. In such item, we propose in this paper a WSN policy using the peddling information...
Delay Tolerant Networks (DTNs) are generally characterized by long and variable delays due to intermittent connectivity. This lack of connectivity make most of the existing routing protocols in WSNs not applicable in DTNs (The performance of such networks depends on connectivity and mobility of some nodes). We propose in this paper a new routing mechanism for a DTN using WSN nodes for localization...
A critical problem in mobile ad hoc wireless sensor networks is each node’s awareness of its position relative to the network. This problem is known as localization. In this paper, we introduce a variant of this problem, directional localization, where each node must be aware of both its position and orientation relative to its neighbors. Directional localization is relevant for applications that...
In underwater sensor networks (UWSNs), determining the location of every sensor is important. The process of estimating the location of each node in a sensor network is known as localization. While various localization algorithms have been proposed for terrestrial sensor networks, there are relatively few localization schemes for UWSNs. Since the sensor nodes are in underwater, they are prone to a...
Localization is a crucial service for various applications in wireless sensor networks (WSNs). Although most researches assume stationary nodes, sensor mobility can enrich the application scenarios. Existing dynamic localization approaches require high seed density or incur a large communication overhead. In order to address these problems, we propose an efficient rang-free localization algorithm,...
In this paper we consider a probabilistic approach to the problem of localization in wireless sensor networks (WSNs) consisting of mobile nodes, and propose a distributed algorithm that help unknown nodes determine their positions. Our proposal is a range-free positioning system based on heading data, which can be provided by a variety of orientation-tracking sensors of different precisions, applied...
Underwater sensor networks (UWSN) are widely used in many applications, such as oceanic resource exploration, pollution monitoring, tsunami warnings and mine reconnaissance. In UWSNs, determining the location information of each sensor node is a critical issue, because many services are based on the localization results. In this paper, we introduce a novel underwater localization approach based on...
The following topics were dealt with: wireless multimedia networks; wireless sensor networks; localization and positioning; mesh networks; QoS and energy awareness; mobility; MAC protocols; mobile network management; resource management in multihop networks.
We propose a localization algorithm that tries to improve the Monte Carlo technique for mobile sensor networks by merging different alternatives into the original Monte Carlo algorithm. Our objective is to reduce some of its existing liabilities, while guaranteeing a better accuracy, faster localization convergence, and controlled communication overhead.
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