Bluetooth Based Smart Sensor Network By SAIKIRAN PANJALA

1. Presenting By
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Under the guidance of
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2.  A bluetooth is a form of wireless technology used for short
distance.
 It can be seen any field from mobile to any wireless device such
as laptop.
 A sensor network would be connected to internet in the central
part and internet would be connected to client computer.
 The main goal sensor network implementation was to
implement and build a hardware platform and used for
research of wireless sensor network protocols

3.  Short range communications technology intended
to replace cables connecting portable and /or
fixed devices.
 Still able to maintain a high level of security.
 Defines uniform structure for wide range of
devices to connect and communicate.
 Key features are
- Robustness,low power and cost.

4.  Networks of small devices equipped
with sensors, microprocessor and
wireless Communication interfaces
and power sources.
 Automatically collected and presented
in structured way using xml.
 No limits in sensor type and number
of sensor.
 Various simple RF, Bluetooth, UWB or
infrared might be used for
communication between sensors.

5.  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.

6. Monitoring friendly forces, equipment
and ammunition
 Nuclear, biological and chemical
attack detection
 Environmental applications
 Health application

7.  Bluetooth is already well developed and
experienced
 Large range of Bluetooth devices available today.
 Relatively low cost.
 Many protocols are already developed.
 Automatic node discovery and connection set up.

8.  Standard: IEEE 802.15
 ISM Band Frequency: 2.4 GHz
 Range: 10 – 100 meters
 Channel Band width: 1 Mbps
 Data Transfer Rate: 721 Kbps
 Power saving mode(sniff , park and stand by)
 piconet & scatternet

9.  Challenge : It is to ensure interoperability among
various Bluetooth manufacture’s devices and to
provide numerous applications.
 Many smart sensor nodes scattered in the field
collect data and send it to users via ‘gateway’
using multi-hop routers.

10. Communication with sensor
networks: Shortage Wireless
Communication ; Discovery of
smart sensor nodes
Gateway Logic: Controlling
Gateway interface and data flow;
Providing uniform access to
sensors
Communication with users:
Function of
gateway :

11.  Main goal is to develop hardware and software
for test based for researcher.
 Automatically collected and presented in a
structured way using XML.
 New protocols can be added easily without
affecting current functionality.

12. For implementation of Sensor as Bluetooth Node, following
components are important:
 Bluetooth Device
 Sensors
 Microcontroller
Its provide the
 Sensing
 Dataprocessing
 Communication

13.  Gateway is implemented in Pentium laptop with
linux OS.
 Complete software functionality developed in java
so it is possioble to change in operation system.
 It can be implemented by the use of either
bluetooth ,PCMCIA CARD.
 Java community undertook the first effort
towards bluetooth stack API application
 Ex-JSR-82 JABWT

14. Bluetooth Hardware
Architecture

15. Bluetooth hardware
architecture
Bluetooth Hardware consists of 3 main
functional modules:
2.4 GHz Bluetooth RF Transceiver Unit
Link Management Unit
Host Controller Interface
HOST CONTROLLER– Consists of a Digital
Signal Processing part,having Link
Controller(LC) & CPU Core. It interfaces to the
Host environment.
LINK CONTROLLER - Consists of Hardware &
Software parts to perform Base-Band
Processing, and PhysicalLayer Protocols.Also
performs low-level digital signal processing
to form connections.

16. Discovery Of Smart Sensor
Nodes
 After installation, the primary step
during execution is to discover the
smart sensor nodes in the area.
 The is to prepare a list of sensor’s
characteristics and network topology.
 Next in execution process, provision is
to have addition of new or removal of
existing sensors.

17. Communication with smart
sensor nodes
 Initialization of gateway and Bluetooth
Inquiry Procedure.
 Discovery of Bluetooth device and
Checking of major and minor devices.
 Description by Service-Class Field.
 Discarding of non-smart nodes.
 Exchange the service profile of each
other.
 Lastly, Bluetooth link is established and
data exchange with smart node starts.

18. Abstraction layers
 Gateway’s abstraction layer uses
sensor profiles to create list of objects
that represent each sensor in the
network.
 Each object provides methods that
enable sending and receiving data to
and from sensor. Specifics of actual
data transmission are hidden from
users.

19.  Interesting research area with many possible solution
 They are based on many collaborative effort of small
devices
 Many open issue related to physical layer , MAC layer
, routing layer and application layer

20.  Bluetooth Based smart Sensor Networks –
Implementation Issues and Solutions -Srdjan
Krco - Applied Research Lab, Ericsson Ireland
 I.F. Akyildiz, W. Su, Y. Sankarasubramaniam,
E.Cayirci, “Wireless sensor networks: a
survey”,Computer Networks 38, Elsevier, 2002
 C. Shen, C. Jaikeeo, “Sensorinformation networking
architecture and applications”,IEEE Personal
Communications, August 2001

21. Thank you!!!