30-01-2012, 02:11 PM
BLUETOOTH technology
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BLUETOOTH NETWORK TOPLOGY
Master Slave Concept
Master Controls All traffic in the Network
Piconet
It is Defined by its Frequency hopping Sequence
Scatternet
PICONET
One machine which is connected to one or more devices That type of connection is called Piconet
The Bluetooth piconet consists of 1 master device and up to 7 slave devices
Slaves cannot communicate directly with each other
Priority based scheduling
The master defines the priority in the piconet
Master determines the Frequency hopping sequences
ANTENNA
2.4 GHz
Radiation Pattern
It works best if it is placed at 90 degree of the device. Also 45 degree works better, where Lap-Top on desk and cellular phone under desk.
Some patterns are directional
Some are Isotropic
Designed pattern will vary based on the products for which it is built.
LAN access point covers the room and is directional.
Cellular phones need wide range and do not need directional pattern.
Polarization finally has both linear and & circular elements.
ON-Chip antenna
