WIRELESS SENSOR NETWORK
Prepare for your exams
Study with the several resources on Docsity
Earn points to download
Earn points by helping other students or get them with a premium plan
Guidelines and tips
Prepare for your exams
Study with the several resources on Docsity
Earn points to download
Earn points by helping other students or get them with a premium plan
Wireless Sensor Networks Introduction, Lecture notes of Wireless Sensor Networks
introduction to WSN - A complete overview
Typology: Lecture notes
2018/2019
1 / 43
This page cannot be seen from the preview
Don't miss anything!
Related documents
Partial preview of the text
Download Wireless Sensor Networks Introduction and more Lecture notes Wireless Sensor Networks in PDF only on Docsity!
WIRELESS SENSOR NETWORK
DEFINITION
CHARACTERISTICS
ADVANTAGES
CHALLENGES
TYPES
APPLICATIONS
STANDARDIZATION
ARCHITECTURE
TOPOLOGY
PROTOCOLS
(^) A wireless sensor network ( WSN ) (called a wireless sensor and actor network (WSAN)) are 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
Low cost.
Low power (more throughput and delay ).
Multifunctional sensor nodes that are small in size.
Communicate under short distance (sensing , data
processing , communicating ).
Instead of sending the raw data to the nodes responsible for
the fusion, sensor nodes use their processing capabilities to
locally carry out simple computations and transmit only the
required and partially processed data.
Heterogeneity of nodes.
Ability to cope with node failure.
It leads to less power consumption than the traditional
single hop communication.
Eliminates wires
Facilitates data and voice communications
Offers information of ad-hoc networks
Free of charge
Easy to use
(^) Stationary and mobile environments (^) Can accommodate new device at any time (^) Flexible to go through physical partition (^) It can be accessed through a centralized monitor (^) Scalability (increase network robustness )
Interacting with their
environment through
various sensors,
Processing
information locally
Communicating this
Information wirelessly
with their neighbors
(^) Source function : Source nodes with even information perform communication functionalities in order to transmit their packets to the sink.
- Router function: Sensor nodes also participate in forwarding the packets received from other nodes to the next destination in the multi-hop path to the sink.
Pre-deployment and Deployment Phase (^) reduce the installation cost (^) eliminate the need for any pre- organization and preplanning increase the flexibility of arrangement (^) Promote self-organization and fault tolerance. Post-deployment Phase (^) the topology of the network may change periodically (^) according to the sensing tasks and the application, when certain nodes need to be turned off for a specific amount of time.