Bluetooth architecture

Bluetooth architecture defines two types of structure :
  1. Piconet
  2. Scatternet
1. Piconet 
  • Eight devices are connected in a Bluetooth network called as a piconet, so the piconet have up to eight active nodes 
  • One of them acts as a master and others act as slaves.
  • In piconet communication between the primary and secondary can be one to one or one to many forms. 
  • All communication is done between master and slave. slave-slave or master-master communication is not possible
2. Scatternet
  • A Scatternet is formed when two more piconets connect through a bridge node. 
  • It is combining various piconet.
  • In scattered addition to be seven active slaves, there can be up to 255 parked nodes in the net that can only respond to a beacon signal from the master.
  • The slaves are also dumb devices that do the task that the master tells them to do.
  • Mater controlling the clock and it is determining in which slave gets to communicate in which time slot.
  • All the communication is between the master and slave and but not between the slaves.
Bluetooth architecture