The document summarizes a seminar presentation on wireless sensor networks. It discusses the architecture of WSNs, including sensor nodes, gateways, base stations, and networking topologies. It also covers the advantages and disadvantages of WSNs, their applications in fields like environmental monitoring and medical monitoring, and their future potential to bridge the physical and digital worlds.

1. Government Polytechnic, Pune
An Autonomous Institute of Government of Maharashtra
SEMINAR PRESENTATION ON
WIRELESS SENSOR NETWORKS
Presented By:
Ganesh S. Khadsan
1206103
Guided By:
Prof. Mrs N. R. Wagh
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2. PRESENTATION FLOW
INTRODUCTION
WSN ARCHITECTURE
NETWORKING TOPOLOGIES
ADVANTAGES &
DISADVANTAGES
APPLICATIONS
FUTURE WORK
CONCLUSION
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3. Introduction
Wireless 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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4. Wireless Sensor Network
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5. 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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6. Sensor Node
Gateway
Base Station
Wireless Sensor Network Architecture
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7. 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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8. 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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9. Block Diagram of WSN Architecture
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10. Architecture of Sensor Node
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11. 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 Topology
2.Mesh Topology
3.Star Topology
4.Ring Topology
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12. Topologies
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13.  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

14.  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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15. Applications of WSN
The applications for WSNs are many and varied. Some of the
major applications are as follows:
Environmental monitoring
Habitat monitoring
Acoustic detection
Seismic Detection
Military surveillance
Inventory tracking
Medical monitoring
Smart spaces
Process Monitoring, etc.
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16. 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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17. 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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