Wireless Sensor Networks
-VENKATA ANIRUDH ADDEPALLI
OUTLINE

What is a WSN

Components of a WSN

Communication Architecture

Applications of WSN

Protocol Stack

Routing Protocols

Data Centric Routing and Aggregation

WSN Operating Systems

Conclusion
1
What is a WSN
A group of sensors deployed in a remote
site that communicate using wireless
technology with each other to pass the
collected data to a end user.
2
Components of a WSN
3
Communication Architecture
4
Applications of WSN
5
Protocol Stack
6
Routing Protocols
 LEACH
 PEGASIS
 SPIN
 Directed Diffusion
 Rumor Routing, etc.
7
Data Centric Routing and
Aggregation


Interest dissemination is performed to assign
sensing tasks to sensor nodes

Sinks broadcast the interest

Sensor nodes broadcast an advertisement for
available data
Requires attribute-based naming

Users are more interested in querying the attribute of
the phenomenon, rather than querying an individual
node

E.g. the sensor nodes in the area where temperature
is greater than 75 F
8
WSN Operating Systems
 TinyOS
 Contiki
 MANTIS
 BTnut
 SOS
 Nano-RK
9
Conclusion

WSNs possible today due to technological advancement in
various domains

Internet of Things

Design Constraints need to be satisfied for realization of
sensor networks

Tremendous research efforts being made in different layers
of WSNs protocol stack
10
THANK YOU