2. What Is Bluetooth? You're coming back home after a long, hard day. You've met some important people and entered notes about the meetings in your PDA. Now, you want to transfer the information to your PC. The traditional way to do this is to pull out the Hotsych cradle, connect the two together, and start the transfer…... Consider this scenario instead - the moment you enter your room, you touch a button on your PDA, and the data gets transferred to your PC. NO physical connections , no need to start up synchronization software, not even the need to be near your PC. Wouldn't you like that? Say hello to
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5. Why Bluetooth? Bluetooth standard is aimed at achieving global acceptance such that any Bluetooth device, anywhere in the world, can connect to other Bluetooth devices in its proximity, regardless of brand . Bluetooth enabled electronic devices connect and communicate “ wirelessly” via short-range, ad hoc networks called piconets . Each unit can simultaneously communicate with up to seven other units per piconet. Moreover, each unit can simultaneously belong to several piconets .
6. Ad hoc networking * These piconets are established dynamically and automatically as Bluetooth devices enter and leave the radio proximity. * Since each Bluetooth device supports both point-to-point and point-to-multi-point connections, several piconets can be established and linked together ad hoc. The Bluetooth topology is best described as a multiple piconet structure.
7. In-home Bluetooth Network Cordless Phone Remote Speech recognition Call by name Build shopping lists Home PBX Family Car Trip Navigation downloads Download News/Entertainment Personal display pad Shopping lists Fast food ordering Book/News/Home PIM Office Laptop Connect to office LAN Email Home Printer access Surf from anywhere Share files Main Home PC Internet Service Pipe 3 cups flour 1 cup grated chocolate 1 cup sugar 1 stick butter 1/2 cup chopped walnuts minutes. Fridge Pad Family Calendar Recipe Display Build shopping lists Voice messaging Intercom
8. Bluetooth in Action Bluetooth can give you a new kind of freedom. You might share information, synchronize data, access the Internet, integrate with LANs or even unlock your car - all by simply using your Bluetooth equipped mobile phone.
10. Competing Technologies There is no single competitor covering the entire concept of the Bluetooth wireless technology but in certain market segments other technologies exist. IrDA For cable replacement the infrared standard IrDA has been around for some years and is quite well known and widespread. IrDA is faster than the Bluetooth wireless technology but is limited to point-to-point connections and above all it requires a clear line-of-sight . In the past IrDA has had problems with incompatible standard implementations, a lesson that the Bluetooth SIG has learnt. Wireless LAN Wireless LANs based on the IEEE 802.11 standard. The technology is used to replace a wired LAN throughout a building. The transmission capacity is high and so is the number of simultaneous users. On the other hand, compared to Bluetooth wireless technology, it is more expensive and power consuming, and the hardware requires more space. It is therefore not suitable for small mobile devices.
11. Competing Technologies Home RF The Home RF also uses the 2.4 GHz radio band and has many similarities to the Bluetooth wireless technology. Home RF can operate ad hoc networks (data only) or be under the control of a connection point coordinating the system and providing a gateway to the telephone network (data & voice). The hop frequency is 8 Hz while a Bluetooth link hops at 1600 Hz. Ultra-Wideband Radio Ultra-Wideband Radio (UWB) is a new radio technology still under development. Short pulses are transmitted in a broad frequency range. The capacity appears to be high while power consumption is expected to be low.
12. Comparision between technologies TCP / IP Via IP Medium 50m 1.6 Mbps Home RF Via PPP Via IP and cellular Medium <10m 1 Mbps Bluetooth Via PPP Via IP Low < 2m 16 Mbps IrDA TCP / IP Via IP Medium 50m 2 Mbps IEEE 802.11 Data network support Voice network support Relative Cost Range Peak Data Rate
13. Bluetooth devices v/s wireless LANs Cheaper than WLANs Much more expensive Cost No interference Significant interference Interference Just started in 2002 Quite widespread Market Penetration Upto 30 feet 802.11a- Upto 60 feet 802.11b- Upto 300 feet Distance coverage 1 – 2 Mbps 11 Mbps - 54 Mbps Speed 2.4 GHz IEEE 802.11a-5GHz, IEEE 802.11b-2.4GHz Frequency band Standards in 2000, Products in 2001/2002 Standards in 1998, Products in 2000 Time table Bluetooth IEEE 802.11a & 802.11b
