Wireless Sensor Networks (WSNs) are new category of wireless networks that are gaining importance in large number in civilian and military applications. WSN is a distributed and autonomous sensor device used for monitoring physical or environmental conditions. Sensor nodes are part of WSNs and are tiny in size. They are connected and communicate with each other to exchange data and information. These nodes are capable of sensing temperature, humidity, pollution level in environment, atmospheric pressure and transfer these ...
Read More
Wireless Sensor Networks (WSNs) are new category of wireless networks that are gaining importance in large number in civilian and military applications. WSN is a distributed and autonomous sensor device used for monitoring physical or environmental conditions. Sensor nodes are part of WSNs and are tiny in size. They are connected and communicate with each other to exchange data and information. These nodes are capable of sensing temperature, humidity, pollution level in environment, atmospheric pressure and transfer these information to a base station (BS) which is also termed as sink. Some of the applications include weather monitoring, movement of vehicles in highways, movement of wild animals in forest, battlefield surveillance and industrial applications. Nodes in the network communicate among themselves through wireless medium and the same medium is used to transfer data from sensor nodes to sink. Sensors are equipped with battery as source of energy which gets drained quickly and in many situations they are not replaceable. Therefore, there is a need to design protocols for different layers which are energy aware. The objective of this chapter is to highlight the techniques, issues, challenges and applications of WSN.
Read Less
