WiSe-Nodes: A family of node prototypes for wireless sensor networks - - PowerPoint PPT Presentation

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Aug 18, 2023 603 likes •802 views

WiSe-Nodes: A family of node prototypes for wireless sensor networks R. Marceln, M. Lpez, M. Ruiz and Vctor Ramos MetropolitanAutonomous University, Mxico http://victor.ramos.online.fr Outline Introduction Architecture WASP:

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R. Marcelín, M. López, M. Ruiz and Víctor Ramos

MetropolitanAutonomous University, México http://victor.ramos.online.fr

WiSe-Nodes: A family of node prototypes for wireless sensor networks

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Outline

Introduction Architecture WASP: Wireless Asynchronous Simple

Protocol

Design tests Conclusions and further work

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What is a Wireless Sensor Network (WSN)?

 Sensor:

 A transducer  converts physical phenomenon e.g. heat, light, motion,

vibration, and sound into electrical signals

 Sensor node:

 Basic unit in a sensor network  Sensors, processor, memory, transceiver, and power supply

 Sensor network:

 Large number of sensor nodes  Nodes deployed either inside or very close to the sensed

phenomenon

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WSN: Application examples

 Military applications  Environmental applications  Health applications  Home and office applications  Automotive applications

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Military applications (examples)

 Monitoring equipment.  Surveillance.  Targeting  Detection

Nuclear Biological Chemical attack Etc.

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Environmental applications

Forest fire detection Flood detection Air/water pollution

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Home applications (examples)

Home/office automation. Smart environments.

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WSN: Application examples

Automotive applications

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Parameters on WSN design

 Scalability  Fault tolerance  Power consumption  Topology  Environment

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WSN’s characteristics

One or more sink nodes. No direct connection to the sink node

Forward Routing

Shared medium (wireless)

MAC protocol.

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Examples of commercial sensor nodes

Motes

 UC Berkeley

Btnodes

 ETH Zürich

Scatterweb

 Freie Universitat

EYES

 Infineon

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Commercial WSN nodes: advantages and disadvantages

 Advantages

 They implement the basic function of a WSN node.  Optimized design.

 Disadvantages

 Expensive  Sometimes difficult to extend

 So, it is desirable to account with a benchmark to

implement a WSN node So, we buildWiSe-Nodes

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WiSe-nodes architecture

WiS iSe-nod nodes’ funct ctions:

Send/receive data packets.
Send/receive forward sensor data.
Send/receive ctrl packets (MAC & routing)

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Components of a WiSe-Node

 Processor unit

 Two Microchip PIC16F877A microcontrollers.  F-Microcontroller (transceiver interface)  H-Microcontroller (hybrid routing and MAC protocol)

 Two different transceivers

 Chipcon CC1000PP-868  Raw RF transceiver: TWS-BS and RWS-374

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WASP: Wireless Asynchronous Simple Protocol

 WASP: Implements MAC and routing.  Goal: Collect sensor data and send data to the head node (h)

f theWSN.

 Collecting data:

 h builds a tree.  h is the head of the tree.  Tree is built by using a token.

 Two stages:

 Adoption process  Tree maintenance

 Each node implementsWASP

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WiSe-Nodes: Types of tests

Topology Test h node and two childrens Consistency ofWASP h node  child  child Idem: Data collected by the head node

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Conclusions

 WiSe-Nodes: general architecture to build a wireless sensor

node.

 A testbed to implement new wireless sensor network

protocols.

 Architecture based on the PIC16f877 microcontroller.  WiSe-nodes are about 60% less expensive than commercial

nodes forWSNs.

 Further work:

 Port our code toAmtelAVRs.  Use light, rotation and vibration sensors.

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Thanks! Merci !

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