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Lecture 02 - Summary Types of Wireless Systems and Networks (WSN -…
Lecture 02 - Summary
Types of Wireless Systems and Networks
Types of Wireless Systems
WPAN - Personal Area Network
WLAN - Local Area Network
WAN - Wide Area Network
Types of Wireless Networks
Ad hoc Networks
Self –configuring, infrastructure‐less wireless networks
Multi‐hop peer‐to‐peer networks
Hybrid (Centralized or Peer‐to‐peer)
Unicast, multicast and broadcast networks
Ad Hoc ‐ Wireless Mesh Networks
Similar to Ad Hoc, but more static/permanent, with little or no mobility of router nodes
Less resource constraints (energy, processing power) compared to Ad Hoc
The trend now is to use wifi mesh systems. We set up some nodes that has better ressources lets say like our phones. They are used as hubs to connect to the individual users that can be very mobile
Ad hoc - MANET - Mobile Ad hoc Networks
collection of wireless mobile nodes forming a temporary network without the aid of any centralized administration or station
A lot of challenges
VANET
WSN - Wireless Sensor Network
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WSN - Wireless Sensor Network
Large number of self‐powered small sensing nodes which gather information or detect special events and communicate wirelessly with the end goal of handing over their processed data to a base station
3 main components in a WSN: the sensor, the processor, and the radio for wireless communication.
Pervasive
‐ Have the potential to be everywhere
Technology for D2D (device to device) and M2M (machine to machine) applications
WSN
Enables
:
Extended range of sensing which improves data quality
Fault tolerance due to redundancy in data from different sensors
Distributed processing of large amounts of sensor data
Scalability to large scale deployment and ease of use:
Relatively inexpensive and can be easily scattered over large areas
Collaboration of different types of sensors to perform a larger sensing task
Challenges
:
Autonomous operation
Highly dynamic and harsh environments
Communication and Sensor nodes failure and addition of new nodes
Distributed computation protocol and wireless comm paradigm required
Power consumption constraints for nodes using batteries or energy harvesting
When you dont have a centrlaized system it means that the network is very dynamic, sensors can fail and so on