in this paper, we study wsn design, as a multi-objective optimization problem using ga technique. we study the effects of ga parameters including population size, selection and crossover method and mutation probability on the design. choosing suitable parameters is a trade-off between different network criteria and characteristics. type of deployment, effect of network size, radio communication...

Connectivity and coverage are two crucial problems for wireless sensor networks. Several studies have focused on proposing solutions for improving and adjusting the initial deployment of a wireless sensor network to meet these two criteria. In our work, we propose a new hierarchical architecture for sensor networks that facilitates the gathering of redundancy information of the topology. Severa...

Sybil attacks pose a serious threat for Wireless Sensor Networks (WSN) security. They can create problems in routing, voting schemes, decision making, distributed storage and sensor re-programming. In a Sybil attack, the attacker masquerades as multiple sensor identities that are actually controlled by one or a few existing attacker nodes. Sybil identities are fabricated out of stolen keys, obt...

In this paper, we propose a mobile physiological sensor that works with an indoor positioning system based on a wireless sensor network. The physiological sensor is a small, mobile, multi-sensor device which includes electrocardiograph, 3-axis accelerometer, barometer, thermometer, and hygrometer. In addition, the device is a network node of a wireless sensor network and receives beacon signals...

one of the main challenges in wireless sensor network is energy problem and life cycle of nodes in networks. several methods can be used for increasing life cycle of nodes. one of these methods is load balancing in nodes while transmitting data from source to destination. directed diffusion algorithm is one of declared methods in wireless sensor networks which is data-oriented algorithm. direct...

Observing microclimate changes is one of the most popular applications of wireless sensor networks. However, some target environments are often too dangerous or inaccessible to humans or large robots and there are many challenges for deploying and maintaining wireless sensor networks in those unfriendly environments. This paper presents a mobile sensor network system for solving this problem. T...

Wireless sensor networks with mobile sink are expected to increase the flexibility for gathering information in the large-scale sensing and detecting environments. The sink can randomly move within the sensing area to collect the sensing data. Energy saving becomes one of the most important features for the sensor nodes to extend their lifetime in such networks. To provide reasonable energy con...

This paper describes the implementation of a datacentric middleware for wireless sensor networks in the scope of the European project AWARE. The middleware implements a high-level abstraction for integration of wireless sensor networks with mobile robots. This is achieved by providing datacentric access to the information gathered by the wireless sensor network, which includes mobile robotic no...

mobile robot navigation is one of the basic problems in robotics. in this paper, a new approachis proposed for autonomous mobile robot navigation in an unknown environment. the proposedapproach is based on learning virtual parallel paths that propel the mobile robot toward the trackusing a multi-layer, feed-forward neural network. for training, a human operator navigates themobile robot in some...

Since wireless resources are limited, an efficient way of utilizing wireless resources is needed in selecting IDSs. We propose a monitoring node selection scheme for intrusion detection in congested wireless sensor network. Network congestion is an important issue in mobile network. The network congestion does not guarantee a proper detection rate and congested networks should cause an unreliab...