Review on Wireless Sensor Networks

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  • Topic: Wireless sensor network, Sensor node, Wireless
  • Pages : 18 (5873 words )
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  • Published : April 24, 2013
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AMITY UNIVERSITY MADHYA PRADESH

WIRELESS SENSOR NETWORKS
TERM PAPER

SUBMITTED TO: SUBMITTED BY:
Mr. VIVEK SINGH KUSHWAH M.SWAMY SEKHAR
(Asst. Professor & Coordinator) B.TECH (E.C.E)
ECE ROLL NO. 21

TABLE OF CONTENTS
s.no| TOPIC| Pg.No| 1.| ABSTRACT| 3| 2.| INTRODUCTION| 3|

3.| LITERATURE REVIEW| 5|
4.| DISCUSSION AND CONCLUSION| 14| 5.| REFERENCES| 15| 6.| APPENDIX| 17|

ABSTRACT
Advancements in sensing, microelectronics and wireless communications technologies are paving the way for the development of a new breed of integrated wireless sensing devices. The relatively simple devices that we envision are akin to the sensory receptors of the nervous system in that they are capable of detecting changes in the environment due to stimuli. In this paper, we examine the advancements in location estimation using wireless sensor networks which is one of its major applications. We try to extract few techniques described by the such as self configuration of wireless sensor networks using Cramer-Rao’s method, Probability grid and Experimental analysis of RSSI, Algorithms based on RSSI sampling, ROBUST position estimation, Path loss location estimation and Nonparametric Belief Propagation for Self-Localization. This paper presents an overview of research trends and challenges in the design and implementation of large-scale location estimation using wireless sensor network

INTRODUCTION
A wireless sensor network (WSN) consists of spatially distributed autonomous sensors to monitor physical or environmental conditions, such as temperature, sound, pressure, etc. and to cooperatively pass their data through the network to a main location. The WSN is built of "nodes" – from a few to several hundreds or even thousands, where each node is connected to one (or sometimes several) sensors. Each such sensor network node has typically several parts: a radio transceiver with an internal antenna or connection to an external antenna, a microcontroller, an electronic circuit for interfacing with the sensors and an energy source, usually a battery or an embedded form of energy harvesting. The WSN is built of "nodes" – from a few to several hundreds or even thousands, where each node is connected to one (or sometimes several) sensors. Each such sensor network node has typically several parts: a radio transceiver with an internal antenna or connection to an external antenna, a microcontroller, an electronic circuit for interfacing with the sensors and an energy source, usually a battery or an embedded form of energy harvesting. APPLICATIONS

1. Area monitoring
Area monitoring is a common application of WSNs. In area monitoring, the WSN is deployed over a region where some phenomenon is to be monitored. 2. Environmental/Earth monitoring
The term Environmental Sensor Networks, has evolved to cover many applications of WSNs to earth science research. This includes sensing volcanoes, oceans, glaciers, forests, etc. 3. Water/Waste water monitoring

Monitoring the quality and level of water includes many activities such as checking the quality of underground or surface water and ensuring a country’s water infrastructure for the benefit of both human and animal. The area of water quality monitoring utilizes wireless sensor networks and many manufacturers have launched fresh and advanced...
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