Various experiments have shown that the performance of wireless sensor networks is very hard to predict. It is also acknowledged that deploying sensor networks in real settings is a difficult and tedious task. To contribute to the understanding of wireless sensor network behavior we report on our experience from two recently deployed sensor networks: one in-door surveillance network in a factor...

Network security is vital for securing all information that passed through network computer; hence network security is the most important element in information security. Security is one of the critical concern occurred in WSN due to limitations in computing and fixed resource. Wireless sensor network have a broad area of invaluable games, defence, civil, household, entertainment application. W...

Wireless Sensor Network (WSN) is a collection of sensor nodes to monitor the physical surroundings also in various application such as surveillance, tracking system, machine control, automation etc., WSN are deployed mostly in open and unprotected environment. Several security attacks are invoked in wireless sensor networks during the transmission of data. Because of its open nature wireless se...

Sensor nodes in wireless sensor network are densely deployed to monitor the physical world. In distributed access control user can directly access data from sensor nodes. While accessing data from sensor nodes user details can be caught by sensor nodes. It adversely affects the user privacy. A user does not want the wireless sensor network to associate his details while he accessing data from s...

Due to the limited energy resources, energy efficient operation of sensor node is a key issue in wireless sensor networks. Clustering is an effective method to prolong the lifetime of energy constrained wireless sensor network. However, clustering in wireless sensor network faces several challenges such as selection of an optimal group of sensor nodes as cluster, optimum selection of cluster he...

In order to improve the energy efficiency of cognitive wireless sensor network, this paper introduces threshold-sensitive energy efficient sensor network (TEEN) routing protocol into cognitive wireless sensor network. To make routing and spectrum more stable, this paper presents advanced threshold-sensitive energy efficient sensor network (A-TEEN), which is the optimization of TEEN. A-TEEN opti...

A wireless sensor network (WSN) is a specialized wireless network that composes of a number of sensor nodes deployed in a specified area for monitoring environment conditions such as temperature, air pressure, humidity, light, motion or vibration, and so on. The sensor nodes are usually programmed to monitor or collect data from surrounding environment and pass the information to the base stati...