A Seminor Topic: Satya Swaroop.i 08x41f0047

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Satya Swaroop.I 08x41f0047

INDEX INTRODUCTI ON DEFINITION & DEVICES HISTORY USES CONCEPT CONCLUSION

INTRODUCTION Bluetooth, the new technology named after the 10th Century Danish King Harold Bluetooth, is a hot topic among wireless developers.

Bluetooth is an always-on, short-range radio hookup that resides on a microchip. It was initially developed by Swedish mobile phone maker Ericsson in 1994 as a way to let laptop computers make calls over a mobile phone

BLUETOOTH -DEFINITION Bluetooth can be defined as a short range wireless device that connects electronic devices such as computers, cell phones, PDA’s etc... Any where in the world (or) Bluetooth can also be defined as a secure and inexpensive way of connecting and exchanging information between devices without wire.

DEVICES

HISTORY It was developed by a group called Bluetooth Special Interest Group (SIG), formed in May 1998. The founding members were Ericsson, Nokia, Intel, IBM and Toshiba. Almost all of the biggest companies in the telecommunications business have joined the Bluetooth SIG and the number of the participating companies

USES To exchange business card. To send data over a modem. To send voice from headset to a mobile phone. For real-time satellite navigation using GPS. To connect to our PC or Laptop for transferring files. To connect to internet for searching or for mailing.

CONCEPT Bluetooth Architecture and layers:Bluetooth architecture is the combination of both the hardware based and software stack which specifies the link between layers. This architecture supports flexibility in implementation of links across different devices.

Data

Control

L2CAP

Channel

Resource

manager

Figure:-

Layer 3

Link Manger Layer 2

Base band Resource Link Controller Layer 1

Radio

In Bluetooth architecture , layers are divided into lower layers and upper layers.

Lower Layers:(a) Radio:This layer is responsible to transmit and receive the packets of information on the physical channel. The timing and frequency of this layer is controlled by a base band layer by means of a control path.

(b) Link controller:It encodes and decodes Bluetooth packets from the data payload and corresponding parameters such as physical channel, logical link and logical transport. (c) Base band Resource Manager:Base band resource manager has two functions namely. (1) It has a scheduler that permits time on the physical channels to all the entities which refuses an access contract. (2) To negotiate contract with the entities.

(d) Link Manager:The function of link manager layer is to create, modify and release of logical links as well to update the parameters involving physical links between devices.

Upper Layers:(a) Channel Manager:This block is responsible to create, manage and destroy L2CAP channels for the transport of service protocols and application data streams.

(b) L2CAP Resource Manager:The function of this block to manage the order of submission of fragments to the base band.

CONCLUSION