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BLUETOOTH BASED SMART SENSOR NETWORKS. Presented BY:- S.KOTESWARA RAO 09511A0528. INTRODUCTION. Bluetooth is wireless high speed data transfer technology over a short range (10 - 100 meters). Bluetooth Wireless Technology (BWT) was developed in 1994 at Ericsson in Sweden.

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bluetooth based smart sensor networks

BLUETOOTH BASED SMART SENSOR NETWORKS

Presented BY:-

S.KOTESWARA RAO

09511A0528

introduction
INTRODUCTION
  • Bluetooth is wireless high speed data transfer technology over a short range (10 - 100 meters).
  • Bluetooth Wireless Technology (BWT) was developed in 1994 at Ericsson in Sweden.
  • Purpose – Originally it was build to eliminate the need for cable connections between PDAs and notebook PCs.
bluetooth
BLUETOOTH

Bluetooth Specifications are:

  • Developed by: Jaap Haarsten and Sven Mattisson in Sweden
  • Standard: IEEE 802.15
  • Range: 10 – 100 meters
  • Channel Bandwidth: 1 Mbps
  • Maximum Asymmetric Data Transfer Rate: 721 Kbps
bluetooth topology
BLUETOOTH TOPOLOGY

Depending on the type of connections established between various Bluetooth devices, 2 main topologies are as:

  • PICONET TOPOLOGY, and
  • SCATTERNET TOPOLOGY
  • To any topology, there are 2 prime components:
  • MASTER device
  • SLAVE device
1 piconet topology
1. PICONET TOPOLOGY
  • A piconet consists of up to 8 BWT-enabled devices.
  • When piconet is established, one device sets up frequency-hopping pattern and other devices synchronize their signals to the same pattern.
  • Primary Devices: Those devices which sets the frequency- hopping pattern.
  • Secondary Devices: Those devices which get synchronized.
  • Each piconet has a different frequency-hopping pattern.
piconet topology contd1
PICONET TOPOLOGY (contd.)
  • In Bluetooth, each piconet has 1 Master for establishment of piconet, and upto 7 Slave devices.
  • Master’s Bluetooth address is used for defining frequency-hopping sequence.
  • Slave devices use master clock to synchronize their clocks so as to hop simultaneously.
  • For establishing piconet, other bluetooth devices in range are discovered by an inquiry procedure.
2 scatternet topology
2. SCATTERNET TOPOLOGY
  • Scatter net consists of several piconets connected by devices participating in multiple piconet.
  • Here, devices can be slaves in all piconets or master in one piconet and slave in other piconets.
  • There is a ‘BRIDGE’ connecting 2 piconets which is also a slave in individual piconets.
smart sensor networks
SMART SENSOR NETWORKS
  • Challenge: It is to ensure interoperability among various Bluetooth manufactures’ devices and to provide numerous applications.
  • One such application is : WIRELESS SENSOR NETWORKS (WSN)
  • Important features of WSN: Collaboration of network nodes during execution and Data Centric nature.
  • Many smart sensor nodes scattered in the field collect data and send it to users via ‘gateway’ using multi-hop routes.
wireless sensor networks wsn
WIRELESS SENSOR NETWORKS (WSN)

WSN consists of number of small devices equipped with a sensing unit, microprocessors, wireless communication interface and power source.

Two main operations performed by WSN are:

  • QUERING – Queries are used when user requires only the current value of the observation.
  • TASKING – More Complex operation

Used when a phenomenon has to be observed over a large period of time.

applications of sensor networks
Applications of Sensor networks
  • Military applications
  • Monitoring friendly forces, equipment and

ammunition

  • Reconnaissance of opposing forces and terrain
  • Battlefield surveillance
  • Battle damage assessment
applications
Applications :
  • Health applications
  • Tele-monitoring of human physiological data
  • Tracking and monitoring patients and doctors inside a hospital
  • Drug administration in hospitals
smart sensor node implementation
Smart sensor node implementation

For implementation of Sensor as Bluetooth Node, following components are important:

  • Bluetooth Device
  • Sensors
  • Microcontroller

Figure: SMART SENSOR NODE IMPLEMENTATION

conclusion
CONCLUSION
  • Military applications
  • Monitoring friendly forces, equipment and

ammunition

  • Reconnaissance of opposing forces and terrain
  • Battlefield surveillance
  • Battle damage assessment
  • Nuclear, biological and chemical attack detection
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