Scatternet consists of several piconets connected by devices participating in multiple piconet.For establishing piconet, other bluetooth devices in range are discovered by an inquiry procedure.Slave devices use master clock to synchronize their clocks so as to hop simultaneously.Master’s Bluetooth address is used for defining frequency-hopping sequence.In Bluetooth, each piconet has 1 Master for establishment of piconet, and upto 7 Slave devices.Each piconet has a different frequency-hopping pattern.Secondary Devices: Those devices which get synchronized.Primary Devices: Those devices which sets the frequency- hopping pattern.When piconet is established, one device sets up frequency-hopping pattern and other devices synchronize their signals to the same pattern.A piconet consists of upto 8 BWT-enabled devices.To any topology, there are 2 prime components:.Maximum Asymmetric Data Transfer Rate: 721 KbpsīLUETOOTH TOPOLOGY Depending on the type of connections established between various Bluetooth devices, 2 main topologies are as:.Developed by: Jaap Haarsten and Sven Mattisson in Sweden.This specification standardized the Bluetooth technology worldwide.Group called Bluetooth Special Interest Group (SIG)was formed in 1998 to develop the standard of IEEE 802.15.Later the goals were to enable different devices through a commonly accepted standard for wireless connectivity. Purpose – Originally it was build to eliminate the need for cable connections between PDAs and notebook PCs.
Bluetooth Wireless Technology (BWT) was developed in 1994 at Ericsson in Sweden.Bluetooth is wireless high speed data transfer technology over a short range (10 - 100 meters).BLUETOOTH BASED SMART SENSOR NETWORKS Presented BY:- JITENDRA KUMAR 4JN07EC018
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