Wireless sensor networks (WSNs) are an emerging technology that has potential applications in surveillance, environment and habitat monitoring, structural monitoring, healthcare etc. As the usage and development of wireless sensor networks increases, problems related to these networks are being discovered. Dynamic deployment is one of the main issues that directly affect the performance of wire...

key distribution is an important problem in wireless sensor networks where sensor nodesare randomly scattered in adversarial environments.due to the random deployment of sensors, a list of keys must be pre-distributed to each sensor node before deployment. to establish a secure communication, two nodes must share common key from their key-rings. otherwise, they can find a key- path in which ens...

Most mobile sensors self-deployment research aims to design algorithms to uniformly distribute sensors in the sensing region. However, deployed Wireless Sensor Networks (WSNs) with regular sensor density do not meet all types of realistic requirements; for example, hot zones or heavy traffic load areas generally require more sensors to be deployed than other areas when the objective is to const...

Barrier coverage of a wireless sensor network is a critical issue in military and homeland security applications, aiming to detect intruders that attempt to cross the deployed region. While a range of problems related to barrier coverage have been investigated, little effort has been made to explore the effects of different sensor deployment strategies and mechanisms to improve barrier coverage...

................................................................................................................... viii Chapter 1: Introduction ............................................................................................ 1 1.1 Background Information ................................................................................. 1 1.2 Problem Statement ...........................

The Recent advances in electronics and wireless communication technologies have enabled the development of large-scale wireless sensor networks that consist of many low-powers, low-cost and smallsize sensor nodes. Sensor networks hold the promise of facilitating large-scale and real time data processing in complex environments. Some of the application areas are health, military, and home. In mi...