presented by:- s.koteswara rao 09511a0528. introduction bluetooth is wireless high speed data...
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Presented BY:-Presented BY:-S.KOTESWARA RAOS.KOTESWARA RAO
09511A052809511A0528
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INTRODUCTIONINTRODUCTION
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.
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BLUETOOTHBLUETOOTH
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
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BLUETOOTH TOPOLOGYBLUETOOTH TOPOLOGY Depending on the type of connections established between
various Bluetooth devices, 2 main topologies are as:
1. PICONET TOPOLOGY, and
2. SCATTERNET TOPOLOGY
To any topology, there are 2 prime components:
1. MASTER device
2. SLAVE device
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1. PICONET TOPOLOGY1. PICONET TOPOLOGYA 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.
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PICONET TOPOLOGY (contd.)PICONET TOPOLOGY (contd.)
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PICONET TOPOLOGY (contd.)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.
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2. SCATTERNET TOPOLOGY2. SCATTERNET TOPOLOGYScatter 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.
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SMART SENSOR NETWORKSSMART 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.
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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:1.QUERING – Queries are used when user requires
only the current value of the observation.
2.TASKING – More Complex operationUsed when a phenomenon has to be
observed over a large period of time.
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Applications of Sensor networksApplications of Sensor networksMilitary applicationsMilitary applicationsMonitoring friendly forces, equipment and ammunitionReconnaissance of opposing forces and
terrainBattlefield surveillanceBattle damage assessment
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Applications :Applications :Health applicationsHealth applicationsTele-monitoring of human physiological dataTracking and monitoring patients and doctors
inside a hospitalDrug administration in hospitals
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Smart sensor node implementationSmart sensor node implementation For implementation of Sensor as Bluetooth
Node, following components are important:Bluetooth DeviceSensors Microcontroller
Figure: SMART SENSOR NODE IMPLEMENTATION
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CONCLUSIONCONCLUSION Military applicationsMilitary applicationsMonitoring friendly forces, equipment and ammunitionReconnaissance of opposing forces and
terrainBattlefield surveillanceBattle damage assessmentNuclear, biological and chemical attack
detection
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