Proliferation of Wireless sensor network is increased. Security, how to localized sensor between two nodes, efficient authentication, privacy, scalability, flexibility and availability, these are main issues of wireless sensor network. Clustering based wireless sensor network will solve the problem of security, privacy issues and scalability.

The wireless sensor network is one of the types of Ad hoc network. Any sensor node can join or leave the network when they want i.e. self-configuring in nature. There is no central controller is present in wireless sensor network. Wireless sensor nodes are responsible for data routing in the network. Wireless sensor network is used to monitor the environmental conditions like, pressure, tempera...

Wireless sensor network is a popular technology on information acquisition and processing, which has been widely used in plantation ecological monitoring domain. The plantation environments, including antenna height-gain, depolarization, terrain, humidity and many factors have great influences on the propagation of 2.4GHz wireless sensor network radio frequency signal. In this paper, a complete...

Future communication networks are expected to be heterogeneous consisting of different wireless systems such as WLAN and Bluetooth systems, which can be used in building wireless sensor networks. The development of these network technologies and due to the limited energy supply of sensors have prompted sensor researchers to consider alternatives that minimize energy consumption in sensor networ...

Under many research and development cell it has been noted that establishing the wireless sensor nodes network and let them work as a cluster, but the major problem with wireless sensor nodes cluster is monitoring of cluster head through wireless technology has limitation of range. Using existing mobile network one can achieve the task but again it has a limitation over world wide access and su...

This paper is about the wireless sensor network in environmental monitoring applications. A Wireless Sensor Network consists of many sensor nodes and a base station. The number and type of sensor nodes and the design protocols for any wireless sensor network is application specific. The sensor data in this application may be light intensity, temperature, pressure, humidity and their variations ...

Wireless sensor networks are widely considered as one of the most important technologies. The Wireless Sensor Network (WSN) is a wireless network consisting of ten to thousand small nodes with sensing, computing and wireless communication capabilities. They have been applied to numerous fields such as healthcare, monitoring system, military, and so forth. Recent advances in wireless sensor netw...

A Wireless Sensor Network (WSN) is a wireless decentralized structure network consists of many nodes. Nodes can be fixed or mobile. WSN applications typically observe some physical phenomenon through sampling of the environment so determine the location of events is an important issue in WSN. Wireless Localization used to determine the position of nodes. The precise localization in WSNs is a co...

In this dissertation different approaches to robustness in ultra wideband (UWB) wireless sensor networks, specifically biomedical applications, are studied. UWB wireless sensor networks are unlicensed users of the frequency spectrum and they can be interfered by signals from other licensed users/devices that are generally narrowband signals. Due to the relatively high power of narrowband interf...