Topic- Bluetooth Architecture 1 Computer Networks Topic- Bluetooth Architecture MADHAVAN By- Rechethas C 1741143 Riya Rajesh 1741144 Anisha S 1741145

What is Bluetooth? Bluetooth is a wireless LAN technology used to connect devices of different functions such as telephones, computers , notebooks, cameras, printers and so on. It is an example of personal area network. Bluetooth project was started by SIG (Special Interest Group) formed by four companies  IBM, Intel, Nokia and Toshiba for interconnecting computing and communicating devices using short-range, lower-power, inexpensive wireless radios. The project was named Bluetooth after the name of Viking king – Harald Blaatand who unified Denmark and Norway in 10th century. Bluetooth devices have a built-in short range radio transmitter. The rate provided is 1Mbps and uses 2.4 GHz bandwidth. 2

Features Robustness - It uses a fast acknowledgement and frequency hopping scheme to make a radio link robust. Low complexity- The necessary transceiver components present in the devices are simple. Low cost- A wireless device with this technology is available at an affordable price. 2

Applications Allows a transfer of images (or) word documents (or) applications (or) audio and video files between devices without the help of cables. Can be used for remote sales technology allowing wireless access to vending machines and other commercial enterprises. Provides inter accessibility of PDAs, palmtops and desktops for file and data exchanges. It can be used to setup a personal area network (PAN) or a wireless personal area network (WPAN). 2

Bluetooth Architecture Bluetooth architecture defines two types of networks: 1. Piconet 2. Scatternet 2

Piconet Piconet is a Bluetooth network that consists of one primary (master) node and seven active secondary (slave) nodes. Thus, piconet can have up to eight active nodes (1 master and 7 slaves) or stations within the distance of 10 meters. There can be only one primary or master station in each piconet. The communication between the primary and the secondary can be one-to-one or one-to-many. All communication is between master and a slave. Slave-slave communication is not possible. 2

Piconet In addition to seven active slave station, a piconet can have up to 255 parked nodes. These parked nodes are secondary or slave stations and cannot take part in communication until it is moved from parked state to active state.

Scatternet Scatternet is formed by combining various piconets. A slave in one piconet can act as a master or primary in other piconet. Such a station or node can receive messages from the master in the first piconet and deliver the message to its slaves in other piconet where it is acting as master. This node is also called bridge slave. Thus a station can be a member of two piconets. A station cannot be a master in two piconets.

Bluetooth Layer & Protocol Architecture The L2CAP converts data received from the higher layers into packets with different sizes.

Questions Explain Bluetooth layers. (Section C) Explain the components of Bluetooth Architecture with appropriate diagrams.

Thank You