ELECTRONICS AND TELECOMMUNICATION
FINAL YEAR [2004-2005]
TABLE OF CONTENTS
3. WHAT IS BLUETOOTH?
4. BLUETOOTH SPECIFICATIONS
5. BLUETOOTH NETWORKS
6. HOW DOES BLUETOOTH WORK?
7. BLUETOOTH PROTOCOL STACK
8. BLUETOOTH SECURITY
10. MERITS AND DEMERITS
Bluetooth was originally conceived to replace the rat’s nest of cables typical in any PC setup today and this remains a compelling home application.
However, as the Bluetooth evolved it became clear that it would also enable a totally new networking paradigm, Personal Area Networks (PANs)! With PAN technology a user will be able to organize a collection of personal electronic products (their PDA, cell phone, laptop, desktop, MP3 player, etc.) to automatically work together. For instance the contact manager and calendar in the PDA, laptop, and desktop could all automatically synchronize whenever they are within range of each other). Over time PANs will revolutionize the user experience of consumer electronics.
Finally, Bluetooth’s dynamic nature will also revolutionize connectivity to the rest of the world. Bluetooth will automatically discover devices and services nearby so available servers, internet access, printers etc. will automatically become visible to a Bluetooth device wherever it is.
Bluetooth is an open specification for short range wireless voice and data communications that was originally developed for cable replacement in personal area networking to operate all over the world. By enabling standardized wireless communication between any electrical devices, Bluetooth has created the notion of a personal Area Network (PAN), a kind of close range wireless network that looks set to revolutionize the way people interact with the information technology landscape around them. In 1994 the initial study for development of this technology started at Ericsson, Sweden. In 1998, Ericsson, Nokia, IBM, Toshiba, and Intel formed a Special Interest Group (SIG) to expand the concept and develop a standard under IEEE 802.15 WPAN (Wireless Personal Area Network ). In 1999, the first specification was released and accepted as the IEEE 802.15 WPAN standard for 1Mbps networks.
The Bluetooth SIG considers three basic scenarios:
• The first basic scenario is the Cable Replacement ie. the wire replacement to connect a PC or laptop to its keyboard, mouse, microphone, and notepad. It avoids the multiple short range wiring surroundings of today’s personal computing devices.
• The second scenario is ad hoc networking of several different users at very short range in an area such as a conference room.
• The third scenario is to use Bluetooth as an AP to the wide area voice and data services provided by the cellular networks, wired connections or satellite links.
Why the name Bluetooth?
The story of origin of name Bluetooth is interesting. ”Bnluetooth” was the nickname of Harald Blaatand, 10th century Viking who united Denmark and Norway. When Bluetooth specification was introduced to public, a stone carving, erected from Harald Blaatand’s capital city Jelling was also presented. This strange carving was interpreted as Bluetooth connecting a cellular phone and a wireless notepad in his hands. The picture was used to symbolize the vision in using Bluetooth to connect personal computing and communication devices.
What is BLUETOOTH?
Figure1: Bluetooth system blocks
The Bluetooth system consists of a radio unit, a link control unit, and a support unit for link management and host terminal interface functions (see Figure 1). The Host...