In recent years, Wireless Sensor Networks (WSNs) have emerged as a highly important research area because of the rapid advances in hardware, sensor and wireless networking technologies. These advances will also enable WSNs to become key to true ubiquitous computing systems in the near future. However, due to resource constraints and unreliability of wireless networks, efficient communication pr...

routing in wireless sensor networks (wsns) is a very challenging task due to the large number of nodes, their mobility and lack of proper infrastructure. since the sensors are battery powered devices, energy efficiency is considered as one of the main factors in designing routing protocols in wsns. most of energy-aware routing protocols are mere energy savers that attempt to decrease the energy...

Wireless sensor networks (WSNs) are ad hoc networks comprised mainly of small sensor nodes with limited resources, and can be used to monitor areas of interest. In this paper, we propose a solution for securing heterogeneous hierarchical WSNs with an arbitrary number of levels. Our solution relies exclusively on symmetric key schemes, is highly distributed, and takes into account node interacti...

of the Master’s thesis Author: Umer Javed Name of the thesis: Frequency hopping in wireless sensor networks Date: March 2009 Number of pages: 58 Faculty: Faculty of Electronics, Communications and Automation Professorship: S-72 Communications Engineering Supervisor: Professor Riku Jäntti Instructor: M.Sc. Aamir Mahmood Wireless sensor networks (WSNs) are nowadays being used to collectively gath...

Wireless Sensor Networks (WSNs) present new generation of real time embedded systems with limited computation, energy and memory resources that are being used in wide variety of applications where traditional networking infrastructure is practically infeasible. In recent years many approaches and techniques have been proposed for optimization of energy usage in Wireless Sensor Networks. In orde...

Wireless sensor networks (WSNs) consist of a large number of sensor nodes which are capable of sensing different environmental phenomena and sending the collected data to the base station or Sink. Since sensor nodes are made of cheap components and are deployed in remote and uncontrolled environments, they are prone to failure; thus, maintaining a network with its proper functions even when und...

Interconnecting multiple sensor networks is a relatively new research field which has emerged in the Wireless Sensor Network domain. Wireless Sensor Networks (WSNs) have typically been seen as logically separate, and few works have considered interconnection and interaction between them. Interconnecting multiple heterogeneous sensor networks therefore opens up a new field besides more tradition...

Wireless Sensor Networks (WSNs) is used in many applications for precise monitoring. The key issue in WSNs is energy conservation is the most important strategies to save energy and to prolong the lifetime of the WSNs are topology control. A reliable energy-efficient topology control protocol in wireless sensor networks is proposed, it is one of the most important techniques utilized to reduce ...

Wireless Sensor Networks (WSNs) consists of low power, low-cost smart devices which have limited computing resources. A lot of real world applications have been already deployed and many of them will be based on wireless sensor networks. These applications include geographical monitoring, medical care, manufacturing, transportation, military operations, environmental monitoring, industrial mach...

This hands-on textbook focuses on the principles of wireless sensor networks (WSNs), their applications, protocols and standards