Wireless sensor networks are composed of thousands of sensor nodes that can sense, compute, and communicate wirelessly. Each sensor node contains sensing, processing, transceiver, and power units. Sensor nodes monitor conditions like temperature, sound, and pollution. They communicate wirelessly to form a flexible, adaptive network. Wireless sensor networks are used in many applications like healthcare, defense, and environmental monitoring due to advantages like low cost, flexibility, and ease of adding new devices. However, issues like limited battery life, low communication speeds, and interference exist.

1. Wireless Sensor Networks:
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2. Content
• Abstract
• Introduction
• Sensor Node Components
• Sensor Networks Communication Architecture
• Sensor Network Protocols
• Sensor Networks Operating Systems
• Adavantages
• Disadvantages
• Wireless Sensor Networks Applications
• Conclusion
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3. Abstract
• wireless Sensor Networks (WSN) are used invariety of fields which
includes military, healthcare,environmental, biological, home and
other commercialapplications. With the huge advancement in the
field ofembedded computer and sensor technology, Wireless
SensorNetworks (WSN), which is composed of several thousands
ofsensor nodes which are capable of sensing, actuating, andrelaying
the collected information, have made remarkable impact
everywhere. This paper presents an overview of thevarious research
issues in WSN based applications.
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4. Introduction 4
•A Warless sensor network (WSN) is a wireless network
consisting of spatially distributed autonomous devices
using sensors to cooperatively monitor physical or
environmental conditions, such as temprature,sound,
vibration, pressure, motion or pollutants, at different
locations.
A Collection of sensing devices that can Communicate
Wirelessly

5. Sensor Node Components 5

6. Sensor Node Components
• Sensing Unit
• Processing Unit
• Transceiver Unit
• Power Unit
• Location Finding System (optional)
• Power Generator (optional)
• Mobilizer (optional)
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7. WSN Communication
Architecture
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8. WSN Operating Systems
• TinyOS
• MANTIS
• SOS
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9. WSN Development Platforms
• Crossbow
• Dust Networks
• Sensoria Corporation
• Ember Corporation
• Worldsens
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10. Adavantages
• Flexible
• Wsn is a flexible network and can adapt to changes
• Additional of New Devices
• Wsn can accommodate new devices in the network any time
with ease
• Useful to Society
• Wireless sensor networks are used in different fields like
healthcare,defense ,human welfare
• Save Cost
• Wsn save a lot of wining cost
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11. Disadavantages
• Battery issue
• Nodes need to be charged at regular intervals Battery life
of nodes is very low
• Low Communication
• Communication speed is comparatively low than the wired
network
• Distraction
• Wireless sensor networks keep distracting by other wireless
devices
.
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12. Wireless Sensor Networks Applications
• Health care monitoring
• Telemonitoring of human physiological data
• Drug administration in hospitals
• Interactive museums
• Detecting and monitoring car thefts
• Managing inventory control
• Vehicle tracking and detection
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13. Conclusion
• The low cost, flexibility, fault tolerance,high sensing
fidelity and rapid deployment makes way for new
application on remote sensing.
• Realization needs to satisfy the constraints such as a
scalability.
• New wireless ad hoc networking techniques are
required to overcame this constraints
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14. References
• Dr. Chenyang Lu Slides on “Berkeley Motes and
TinyOS”, Washington University in St. Louis, USA
• J. Hill and D. Culler, “A Wireless Embedded Sensor
Architecture for System-Level Optimization”,
Technical Report, U.C. Berkeley, 2001.
• X. Su, B.S. Prabhu, and R. Gadh, “RFID based General
Wireless Sensor Interface”, Technical Report, UCLA,
2003.
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15. Thank you!
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