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A Topology Preserving Map (TPM) is an easily obtainable localization free connectivity based map that preserves physical layout features of 2D/3D sensor networks. This paper considers how to obtain physical maps and physical coordinates from a TPM when the physical locations of a subset of nodes are known. First, we present a General Procrustes Alignment (GPA) based solution, which is the optimal...
The positioning technology is one of the most important technologies in the wireless sensor network. The paper describes the current international positioning on several existing technologies, including the based ranging RSSI, TOA, TDOA, etc. and non-centroid algorithm based on distance, Amorphous algorithm, APIT algorithm and so on. Dv_Hop algorithm is a distributed localization algorithm based on...
Wireless Sensor Networks(WSNs) consists of hundreds of nodes which are of low power, low cost, and tiny devices. The main functionality of these nodes is to sense the environment and send the sensed data to the observer. In order to validate and get the significance of sensing data, location information of the sensor node needs to be combined with the sensed data. In addition to this, there are many...
Generally in mobile devices, localization is a critical issue to provide various services. A common way to find location is to use GPS. However, GPS has several limitations such as its reliability. Especially in none line of sight (NLOS) situations such as indoor environment, GPS is unable to find location. This could be a serious issue for drone fleet because we may lose control of drones. In this...
In a randomly deployed wireless sensor network, sensor nodes must determine their own geographic position coordinates so that the collected data can be ascribed to the location from where it was gathered. We propose a localization algorithm which uses variable range beacon signals generated by varying the transmission power of beacon nodes. The algorithm does not use any additional hardware resources...
Route discovery and node localization are two strongly correlated concepts in wireless sensor networks (WSNs) and many different techniques have been proposed for both challenges. However, many of these solutions assume homogeneous network conditions, e.g., Identical sensor hardware, fixed transmission powers, or uniform node deployment. In heterogeneous networks, where these parameters are allowed...
Recently, wireless sensor networks (WSNs) has been widely recognized as a promising technology in latest development in green buildings communications. Localization is one of the fundamental issues in wireless sensor networks. The accuracy of estimated positions can be significantly helpful to use in an intelligent e-applications. In this paper, we propose a fast and efficient localization scheme...
Wireless sensor networks (WSNs) are based on monitoring or managing the sensing area by using the location information with sensor nodes. Most sensor nodes need hardware support or receive packets with location information to estimate their location, and this needs lots of time or costs, and may have a huge error. In this paper we present a localization mechanism in wireless sensor networks (MRN)...
Localization is an active field of research in wireless sensor networks WSNs. The information of exact physical location of the sensor nodes in WSNs is useful for various application e.g. intrusion detection, target tracking, environmental monitoring and network services etc. In this paper we present the classification and comparative study of localization algorithms. The goal of our consideration...
In many applications, the exact location of the sensor nodes is unknown after deployment. Localization is a process used to locate sensor nodes' positional coordinates, which is vital information. The localization is generally assisted by anchor nodes that are also sensor nodes but with known locations. Anchor nodes generally are expensive and need to be optimally placed for effective localization...
Localization in wireless sensor networks (WSNs) is an essential service, important as both a goal and a mean. It is a goal for WSNs in order to label reported data and a mean for most WSNs to implement networks management services. In distributed localization, there could be a small number of nodes, which have a priori knowledge about their position, called reference nodes and most of the other nodes...
Localization is one of the key issues in the wireless sensors network. Regarding the mobility of the nodes in some of the applications, it is necessary to have a localization algorithm that can support the mobility of nodes. Most of the approaches that have been presented so far have required instruments for the measurement of the distance and the angle or they have needed many beacon nodes for localization...
The development of the large scale sensor networks needs the real time localization problem to be solved with few costs. Some methods that were developed for the time synchronization such as Time of Flight measure or signal level measure such as RSSI, can be used to localize sensor nodes in the network. These methods give different results depending on the estimation processes used for computing the...
Wireless sensor networks are becoming more widely used in various fields. Localization is a crucial and essential issue for sensor network applications. In this paper, we propose a simple, distributed and low cost localization algorithm which approaches the benefits of range-free schemes. The proposed algorithm utilizes the location information of neighbor anchor nodes to estimate the intersection...
Many localization algorithms and systems have been developed by means of wireless sensor networks for both indoor and outdoor environments. To achieve higher localization accuracy, extra hardware equipments are utilized by most of the existing localization algorithms, which increase the cost and greatly limit the range of location-based applications. In this paper we present a method which can effectively...
Localization is an important and active topic in wireless sensor networks. This paper proposes a range free localization scheme based on coverage overlapping. The nodes knowing their locations are called reference nodes and the nodes without the knowledge of their locations are called unknown nodes. In addition, for a reference node, the area within its communication range is called the coverage region...
The basis of procedure in query based sensor networks is such that the component nodes of network wait for receiving query from sink and once they took the query, they provide sink with required data. An issue in this kind of networks is the way that location of responder node is calculated. This requires addition of localization mechanisms or localization hardware. The former has communication overhead...
The location of the anchor node in the wireless sensor network is a key component for calculating the location information of other nodes. An anchor node with GPS location aware is implemented in this study. The power of the anchor node is supplied by two 2600 mAh Li-ion batteries charged by the solar energy. The periodic wakeup scheme with an accelerometer trigger is employed. To determine the decision...
Sensor localization is a necessary and key functionality for the deployment of wireless sensor network (WSN) applications. This paper investigates on the range-free localization approaches for low hardware requirement. A modified DV-Hop localization algorithm is designed to reduce the localization error. The modified DV-Hop uses a novel average hop size estimate scheme, in which the local property...
The localization technology is very important in wireless sensor network. Many localization algorithms have been proposed in recent year, in which DV-Hop is the prevail localization algorithm. But the DV-Hop algorithm is not very accurate. In this paper, we propose an algorithm to improve the positioning accuracy. The proposed algorithm mainly bases on the radio range of anchor nodes to determine...
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