blutooth based sensor network
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This document discusses Bluetooth-based smart sensor networks. It describes wireless sensor networks as networks of small sensor devices that can communicate wirelessly. Bluetooth is proposed for use in wireless sensor networks due to its widespread adoption, low cost, and existing protocols. The document outlines applications of wireless sensor networks and discusses implementing smart sensor nodes and gateways using Bluetooth. It also covers issues like discovery of sensor nodes and communication with the network.
blutooth based sensor network
- 1. Bluetooth Based Smart Sensor Network Presented by, Maulik Patel 131060753011(WiMC)
- 2. What Is Wireless Sensor Network ? Networks of small devices equipped with sensors, microprocessor and wireless Communication interfaces and power sources. It can be deployed in an ad-hoc manner. 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.
- 3. Operation Performed by WSN 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.
- 4. Application Military applications Monitoring friendly forces, equipment and ammunition Nuclear, biological and chemical attack detection Environmental applications Forest fire detection Flood detection and Precision agriculture Health applications Tracking and monitoring patients and doctors inside a hospital Drug administration in hospitals And much more…
- 5. Why to use Bluetooth in WSN? 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 synchronization and connection set up.
- 6. Bluetooth Specification Standard: IEEE 802.15 ISM Band Frequency: 2.4 GHz Range: 10 – 100 meters Channel Bandwidth: 1 Mbps Maximum Asymmetric Data Transfer Rate: 721 Kbps Power saving mode(sniff , park and stand by) piconet & scatternet
- 7. Smart Sensor Networks Challenge : It is to ensure interoperability among various Bluetooth manufactures’ devices and to provide numerous applications. 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.
- 8. Smart Sensor Network (cont.) Function of gateway : 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: Communication over Internet, WAN, Satellite, etc.
- 9. Sensor Network Implementation 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.
- 10. Smart sensor node implementation For implementation of Sensor as Bluetooth Node, following components are important: Bluetooth Device Sensors Microcontroller Its provide the Sensing Dataprocessing Communication
- 11. Sensor network gateway implementation 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
- 13. Bluetooth hardware architecture (contd.) 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.
- 14. 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.
- 15. Communication with smart sensor nodes Initialization of gateway and Bluetooth Inquiry Procedure. Discovery of Bluetooth device and Checking of major and minor devices. Setting of parameters and assigning type of devices and sensors. 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.
- 16. 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.
- 17. Research Issues There are mainly two research issues for bluetooth based smart sensor network:- 1. Hardware development issues, 2. Software development issues. Some other functionality to developed 1. Compression 2. Aggregation 3. Power mode related issues
- 18. Conclusion 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
- 19. References Bluetooth Based Wireless 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. Srisathapornphat, C. Jaikeeo, “Sensorinformation networking architecture and applications”,IEEE Personal Communications, August 2001 K. Sohrabi, J. Gao, V. Ailawadhi, G.J. Pottie, “Protocols for self-organization of a wireless sensor network”,IEEE Personal Communications, October 2000