SEMINAR PRESENTATION ON

WIRELESS SENSOR NETWORKS

Government Polytechnic, Pune An Autonomous Institute of Government of Maharashtra

Presented By:Ganesh S. Khadsan1206103

Guided By:Prof. Mrs N. R. Wagh

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INTRODUCTIONWSN ARCHITECTURENETWORKING TOPOLOGIESADVANTAGES &

DISADVANTAGESAPPLICATIONSFUTURE WORKCONCLUSION

PRESENTATION FLOW

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IntroductionWireless Sensor Networks(WSN)

•WSN are used to collect data from the environment.•They consists of large number of sensor nodes and one or more Base Stations.•The nodes in the network are connected via Wireless communication channels.•Each node has capability to sense data, process the data and send it to rest of the nodes or to Base Station.•These networks are limited by the node battery lifetime.

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Wireless Sensor Network

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Definition

•Wireless Sensor Network (WSN) consists of

spatially distributed autonomous sensors to

cooperatively monitor physical or

environmental conditions, such as

temperature, sound, vibration, pressure,

motion or pollutants.

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Wireless Sensor Network Architecture

Sensor Node

Gateway

Base Station

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Sensors

A Sensor is an electronic device that

measures a physical quantity and

converts it into a signal which can be

read by an observer or by an instrument.

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Architecture of WSN

The entire system can be described as consist as two subsystems depending upon the operation performed by the entire system, such as:-Data Acquisition.Data Analysis.

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Block Diagram of WSN Architecture

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Architecture of Sensor Node

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Networking Topology• A communication network is composed of

nodes, each of which has computing power and can transmit and receive messages over communication links.

• The basic network topologies are 1.Fully connected Topology2.Mesh Topology3.Star Topology4.Ring Topology

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Topologies

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Advantages

It can accommodate new devices at any time. Its flexible to go through physical partitions. It can be accessed through a centralized

monitor. It avoid lot of wiring. WSN’s can be applied on large scale and in

various fields.

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Pros and Cons of WSN

Disadvantages

It is very easy for hackers to hack it as we can't control propagation of waves.

Comparatively low speed of communications. Gets distracted by various elements like Blue-

tooth. Still costly at large.

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Applications of WSNThe applications for WSNs are many and varied. Some of the major applications are as follows:Environmental monitoringHabitat monitoringAcoustic detectionSeismic DetectionMilitary surveillanceInventory trackingMedical monitoringSmart spacesProcess Monitoring, etc.

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Future Scope

Wireless sensor network has the potential to trigger the next revolution in computing. While its applications and potential benefits can spread far and beyond, and could finally break the barrier between physical and digital worlds to allow disappearance of computation.

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Conclusion

• The emergence of wireless sensor networks can finally bridge the gap between physical and digital worlds, with the effect as if to establish nervous system for the physical world.

• It also allows measurement and monitoring in the way that is much closer to the phenomenon than ever before, resulting in continuous and high fidelity of data collected.

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