Bluetooth based smart sensor networks
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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

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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 contd

PICONET TOPOLOGY (contd.)


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


Bluetooth based smart sensor networks

THANK YOU


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