| Bluetooth was the brainchild of the SIG (Special | | | | network, but not performing any activity. Next |
| Interest Group). This SIG included Intel, Toshiba, | | | | the connection establishment process begins with |
| Nokia, IBM, Compaq, Dell, Motorola, HP, Lucent, | | | | the inquiry process. "Inquiry" is a request sent by |
| and Samsung to name a few. They all came | | | | the master to all the devices found in its range. |
| together to set up a short frequency wireless | | | | Whichever devices receive this inquiry send a |
| technology for transferring data. | | | | response with their respective addresses. Now |
| Bluetooth is a communication protocol. It is a like a | | | | the master chooses one address and |
| language that devices use to wirelessly | | | | synchronises with its access point. This process |
| communicate between each other. It is in fact | | | | known as the "Paging technique" involves |
| based on a Master/Slave operation format. Pico | | | | alignment of its clock and frequency with that of |
| net is a term used to describe a network formed | | | | the access point. |
| by one device and all other devices detected in its | | | | Next in line is the "Service Discovery" phase, |
| range. In single coverage are around 10 Pico nets | | | | wherein a link is established and the master |
| can co-exist. A master can connect to more than | | | | device enters the access point using the Service |
| one slave simultaneously. In reality, the master | | | | Discovery Protocol. As a result of linking, a |
| keeps switching between slaves. Bluetooth links | | | | "Communication Channel" is to be created. |
| two Pico nets to form a larger network. This | | | | Sometimes the access point may include a |
| works over a short range and can be used to | | | | security mechanism and you may need to know |
| establish connections between PDAs, mobile | | | | the encryption key or in common terms the PIN. |
| phones, laptops, digital cameras, printers, scanner, | | | | Once the PIN is sent and received and confirmed |
| and many other electronic gadgets. | | | | a communication is established. Finally the master |
| Establishing a connection using Bluetooth is a | | | | and slave can use the communication channel to |
| complicated process. Initially, the device stays in a | | | | transfer data and information. |
| "Passive state", i.e. it is just in contact with the | | | | |