Wireless Sensor Networks (WSN) are designed to collect large amounts of heterogeneous data to monitor environmental phenomenon. Our aim is to adapt WSN nodes communication to their context, in order to optimize the lifetime of the network. Our description of context and WSN characteristics are based on ontologies. Based upon a critical analysis of existing ontologies which formalize the WSN dom...

I. INTRODUCTION Wireless sensor networks are a quickly growing area for research and commercial progress. A wireless sensor network (WSN) is a collection of various data nodes deployed in a network. WSN is useful for military, environmental, and scientific applications to name a few. It is commonly composed of various wireless nodes that are distributed in a certain fashion to cover the area to...

Wireless Sensor Networks have emerged as an important new area in wireless technology. Wireless Sensor Networks (WSN) consists of numerous tiny sensors deployed at high density in regions requiring surveillance and monitoring. There are many existing protocol, techniques and concepts from traditional wireless network, such as cellular network, mobile ad-hoc network, wireless local area network ...

Advancement in MEMS technology, networking and embedded microprocessors have led to the development of a new generation of a Wireless Sensor Network (WSN) that can operate in unattended and harsh environment depending upon application. WSN consist of large number of power-conscious devices called sensor nodes that detect and observe any physical phenomenon and can be used in a wide range of app...

Wireless Sensor Networks (WSNs) are gaining importance for their broad range of commercial applications such as in home automation, health-care and industrial automation. In these applications multi-vendor and heterogeneous sensor nodes are deployed. Due to strict administrative control over the WSN domains, communication barrier, conflicting goal & economic interest of different vendors of sen...

Random Key Distribution (RKD) schemes have been widely accepted to enable low-cost secure communications in Wireless Sensor Networks (WSNs). However, efficiency of secure link establishment comes with the risk of compromised communications between benign nodes by adversaries who physically capture sensor nodes. The challenge is to enhance resilience of WSN against node capture, while maintainin...

In this paper an energy efficient TDMA MAC protocol for wireless sensor networks is presented. Wireless sensor networks use battery operated computing and sensing devices. A network of these devices will collaborate for a common application such as environmental monitoring. This protocol uses TDMA to give nodes in the WSN the opportunity to communicate collision free, the network is selforganiz...

Wireless Sensor Networks have emerged as an important new area in wireless technology. Wireless Sensor Networks (WSN) consists of numerous tiny sensors deployed at high density in regions requiring surveillance and monitoring. There are many existing protocol, techniques and concepts from traditional wireless network, such as cellular network, mobile ad-hoc network, wireless local area network ...

Wireless sensor networks are often located in areas where access to them is difficult or dangerous. Today, in wireless sensor networks, cluster-based routing protocols by dividing sensor nodes into distinct clusters and selecting local head-clusters to combine and send information of each cluster to the base station and balanced energy consumption by network nodes, get the best performance ...

A network consisting of distributed autonomous sensors to cooperatively monitor physical or environmental conditions such as s o u n d , temperature, p r e s s u r e , pollutants and etc. is called as a wireless sensor network (WSN). The origin of wireless sensor networks was motivated by defense applications i.e. battlefield surveillance. However, WSNs are now used in many commercial and civil...