صفحة العضو

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المنشورات البحثية

الأربعاء 10/نوفمبر/2021

Path Planning Models for Mobile Anchor-Assisted Localization in Wireless Sensor Networks

Abdullah Mohammed Alomari

As event detection is one of the main purposes of using wireless sensor networks (WSNs), the location of nodes is essential to determine the location of an event when it occurs. Many localization models have been proposed in the literature, one of which is to deploy a set of static location-aware nodes, called anchors, to exchange information with the other nodes to determine their location. Another promising proposal involves replacing these sets of static anchors with only one mobile anchor (MA). While this method seems to produce favorable results, it also brings new challenges. The primary challenge is to find an optimal path for the mobile anchor to follow while taking into account the need to provide highly accurate data and more localizable nodes in less time and with less energy. This thesis proposes techniques for mobility-assisted localization in WSNs. In this research work, four main contributions are achieved in the design of such models. Firstly, we introduce a new static path planning model for mobile anchor-assisted localization in WSNs. Our proposed model guarantees that all nodes can receive the localization information and thus estimate their location with higher localization accuracy in comparison to similar static models. Moreover, this model overcomes the problem of collinearity and considers the metrics of precision and energy consumption as well as accuracy, localization ratio and the path length of the mobile anchor. Secondly, although some path planning models in two-dimensional (2D) regions have been proposed in recent years, many WSNs’ practical applications are applied in three-dimensional (3D) regions. We also introduced a three-dimensional path planning model for mobile anchor-assisted localization in WSNs. Our proposed model offers higher performance regarding localization accuracy with a lower error rate in comparison to other proposed models. Thirdly, we propose a novel distributed range-free movement mechanism for mobility-assisted localization in WSNs when the mobile anchor’s movement is limited. The designed movement is formed in a real-time pattern using a fuzzy-logic approach based on the information received from the network and the nodes’ deployment. The novelty of this model lies in employing multiple individual inputs in a fuzzy-logic approach for path planning that are important to minimizing the localization error and maximizing the localization ratio. Our proposed model offers superior results in several metrics including both localization accuracy and localization ratio in comparison to other similar works. Finally, we design two novel dynamic movement techniques that offer obstacle avoidance path planning for mobility-assisted localization in WSNs. The movement planning is designed in real-time using two swarm intelligence-based algorithms: the Grey Wolf Optimizer (GWO) and Whale Optimization Algorithm (WOA). The novelty of our proposed models is the use of optimization algorithms to direct the path formation of the MA, which helps to maximize the localization ratio and minimize the localization error. Both of our proposed models provide better outcomes in comparison to other existing works in several metrics including both localization ratio and localization error rate.

الأربعاء 10/نوفمبر/2021

Energy Efficient Data Collection Scheme Using Rendezvous Points and Mobile Actor in Wireless Sensor Networks

Abdullah Mohammed Alomari

A Wireless Sensor Network (WSN) is a network composed of a large number of nodes that sense, collect, transmit, and deliver data to where it is needed. Considering the variety of applications, the varied efficiency of WSNs in different environments, and their ability to interact with its surrounding, there are still many challenges to be met and problems to be solved. Overcoming these challenges requires a protocol that is tasked with providing and designing a system that is highly efficient, thus saving energy. In WSNs with Mobile-Actors, the task is first to find an effective way to decrease the length of the tour that the M-Actor follows for data gathering. Nonetheless, this short length should be with a guarantee to access all nodes in the networks to collect the sensory data. In this thesis, we propose a protocol that contributes to reducing energy consumption in WSNs by decreasing the M-Actor path and by using Rendezvous Points (RPs) that are distributed around the network. In addition, the proposed protocol increases the network lifetime by consuming less energy in comparison with a similar protocol and offers reasonable spending time for data collection. All of that with guarantee of offering an access for all nodes inside the network to exchange their data with the M-Actors by the suggested RP algorithm. One or more nodes can be represented by a single RP that provide connectivity to all nodes in it wireless range. In case where more M-Actors are used, less time is required for traversing the network for data gathering. It is shown in this research the tour time can be reduced significantly by using more than one M-Actors.

الأربعاء 10/نوفمبر/2021

New path planning model for mobile anchor-assisted localization in wireless sensor networks

Abdullah Alomari, Frank Comeau, William Phillips, Nauman Aslam

As event detection is one of the main purposes of using wireless sensor networks (WSNs), the nodes location is essential to determine the location of that event when it occurs. Many localization models have been proposed in the literature. One of the solutions is to deploy a set of location-aware nodes, called anchors, to exchange information with the other nodes in order to help estimate their own location. Another promising proposal involves replacing these sets of anchors with only one mobile anchor. While this proposal seems to provide favorable results, it brings new challenges. The main challenge is to find an optimal path for the mobile anchor to follow while taking into account the need to provide highly accurate data and more localizable nodes in less time and with less energy. In this paper, we introduced a new static path planning model for mobile anchor-assisted localization in WSNs. Our proposed model guarantees that all nodes are able to receive the localization information, thus, estimate their own location with higher localization accuracy in comparison to similar static models. Moreover, this model overcomes the problem of collinearity and takes into account the metrics of precision and energy consumption as well as accuracy, localization ratio and the path length of the mobile anchor.

الأربعاء 10/نوفمبر/2021

An Energy Efficient and Formally Secured Certificate-Based Signcryption for Wireless Body Area Networks with the Internet of Things

Insaf Ullah, Abdullah Alomari, Noor Ul Amin, Muhammad Asghar Khan, Hizbullah Khattak

Recently, the spectacular innovations in the fields of wireless body area networks (WBAN) and the Internet of Things (IoT) have made e-Care services rise as a promising application domain, which significantly advances the quality of the medical system, however, due to the openness of the wireless environment and privacy of people’s physiological data, WBAN and IoT are prone to various cyber-attacks. There is a significant need for an efficient and highly secured cryptographic scheme that can meet the requirements of resource-constrained devices. Therefore, in this paper, we propose a certificate-based signcryption (CB-SN) scheme for the IoT-enabled WBAN. The proposed scheme is based on the concept of hyper-elliptic curve cryptography (HECC) that offers the same level of security as the elliptic curve and bilinear pairing with lower-key size. The formal security verification using the Automated Validation of the Internet Security Protocols and Applications (AVISPA) tool along with informal security analysis demonstrate that the proposed scheme is not just reducing the complexity of resource-constrained IoT devices, but proves to be secure against several well-known cryptographic attacks. Moreover, performance comparison with relevant existing schemes authenticates that the proposed scheme is far more secure and energy efficient.

الاثنين 08/نوفمبر/2021

Three-dimensional path planning model for mobile anchor-assisted localization in Wireless Sensor Networks

Abdullah Alomari; Nauman Aslam; William Phillips; Frank Comeau

An extensive body of research has been accumulated on finding alternative methods for supplying nodes with their locations in Wireless Sensor Networks (WSNs). Although some path planning models in two-dimensional (2D) regions have been proposed in recent years, many WSNs' realistic applications are applied in three-dimensional (3D) regions. In this paper, we introduce a three-dimensional path planning model for mobile anchor-assisted localization in WSNs. Our proposed model offers higher performance in terms of localization accuracy with a lower error rate in comparison to other proposed models.

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