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Up to 8 devices can be connected in a piconet, and up to 10 piconets can exist within the 10 meter bubble. Each piconet support up to 3 simultaneous full duplex voice devices. How Bluetooth Technology Work : How Bluetooth Technology Work The gross data rate is 1 Mb/s, but the actual data rate are 432 kbps for full duplex transmission,721/56kbps for asymmetric transmission, and 384 kbps for tms2000 transmission. Bluetooth wireless technology is designed to be as secure as a wire with up to 128-bit public/private key authentication, and streaming cipher up to 64 bit based on a5 security. Bluetooth Definitions : Bluetooth Definitions Piconet: Devices connected in an ad hoc fashion, that is, not requiring predefinition and planning, as with a standard network. Two to eight devices can be networked into a piconet. It is a peer network, that is, once connected, each device has equal access to the others. However, one device is defined as master, and the others as slaves. Bluetooth Definitions : Bluetooth Definitions Scatternet: Several piconets may form a larger scatternet, with each piconet maintaining independence. Master unit: The master in a piconet whose clock and hopping sequence synchronizes the other devices. Slave unit: Devices in a piconet that are not the master. Bluetooth Definitions : Bluetooth Definitions MAC address: Three bit address that distinguishes each unit in a piconet. Parked units: Piconet devices that are synchronized but don't have MAC addresses. Sniff and hold mode: Power-saving mode of a piconet device. Network arrangement: : Network arrangement: Bluetooth network arrangements (topology) can be either point-to-point or point-to-multipoint. Any unit in a piconet can establish a connection to another piconet to form a scatternet. Network arrangement: : Network arrangement: See the figure, which diagrams a scatternet in which piconet A, which consists of four units, is connected to piconet B, consisting of two units. Note that the master unit of A is not the link Bluetooth network arrangements (topology) can between the two piconets Network arrangement: : Network arrangement: Bluetooth Characteristics: : Bluetooth Characteristics: It separates the frequency band into hops. This spread spectrum is used to hop from one channel to another, which adds a strong layer of security. Up to eight devices can be networked in a piconet. Signals can be transmitted through walls and briefcases, thus eliminating the need for line-of-sight. Bluetooth Characteristics: : Bluetooth Characteristics: Devices do not need to be pointed at each other, as signals are omni-directional. Both synchronous and asynchronous applications are supported, making it easy to implement on a variety of devices and for a variety of services, such as voice and Internet. Governments worldwide regulate it, so it is possible to utilize the same standard wherever one travels. COMPETING TECHNOLOGIES : COMPETING TECHNOLOGIES While there is no single competing technology that covers the entire concept of Bluetooth wireless technology, in certain market segment other technology do exist. COMPETING TECHNOLOGIES : COMPETING TECHNOLOGIES IrDA For cable replacement, the infrared standard IrDA has been around for several years and is quite widespread. Most new portable PCs, PDAs, and some cellular phones support IrDA, although actual adoption by users has been rather limited. IrDA is faster than Bluetooth but is limited to point to point connections, Whereas Bluetooth is also capable to point to multi point. IrDA’s biggest draw back is that it requires a clear line to sight, and is usually limited to a few feet between devices. COMPETING TECHNOLOGIES : COMPETING TECHNOLOGIES Wireless LAN: Wireless LAN based on the IEEE 802.11b standard are used to replace a wired LAN throughout a building. The transmission capacity is high and so is the number of simultaneous users. However, compared to Bluetooth, these wireless LANs are more expensive, consume more power and have a larger hardware footprint, making them unsuitable for small mobile devices. Bluetooth in the Future : Bluetooth in the Future What is the future direction of the Bluetooth standard?At this time, we anticipate the Bluetooth SIG to evolve the Bluetooth technology to provide greater bandwidth & distances, thus increasing the potential platforms & applications used in the emerging personal area-networking marketplace. Bluetooth in the Future : Bluetooth in the Future What is the future of Bluetooth?Bluetooth is a continually expanding technology. There are plans to add many new application profiles. With over 1800 companies working on Bluetooth, the future could not be brighter. With a strong special interest group behind Bluetooth, the standardization of the application profiles is almost assured. According to market researchers, Cahners In-Stat Group, it is anticipated that as many as 670 million products will have Bluetooth built-in by the year 2005. Bluetooth in the Future : Bluetooth in the Future Will the speed of Bluetooth increase?Some members of the Bluetooth SIG such as Sony & Eastman Kodak are interested in seeing the speed of Bluetooth increasing for applications such as streaming video. Proposals are under consideration but it is not clear when products based on any of the proposals would be available ADVANTAGES OF BLUETOOTH TECHNOLOGY: : ADVANTAGES OF BLUETOOTH TECHNOLOGY: No line of site restrictions as with IrDA. Low power consumption makes integrated in battery powered device very practical. 2.4 GHz radio frequency ensures worldwide operability. Tremendous momentum not only within the computer industry but other industries like cellular telephones and transportation. PREPARED BY : PREPARED BY SANMUGA PRIYA 1st Year ECE Department – B SECTION Slide 21: MRS.SHANTHI SUBMITTED TO You do not have the permission to view this presentation. In order to view it, please contact the author of the presentation.