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Wireless Communication - Zigbee, Bluetooth - IIIT

Wireless Communication - Zigbee, Bluetooth - IIIT

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Piconets<br />

Nodes can assume the role of master or slave<br />

One or more slaves can connect to a master, forming a piconet<br />

The master sets the hopping pattern for the piconet, and all<br />

slaves must synchronize to that pattern: All units share the same<br />

channel<br />

Maximum of 7 slaves controlled by a master (How many<br />

address bits are required?)<br />

<strong>Bluetooth</strong> radios are symmetric - same device can act as both<br />

master and slave<br />

Slaves are not allowed to talk to each other directly<br />

Other operational states (low power)<br />

Parked: Device does not participate in the piconet,<br />

synchronized to the master and can be quickly reactivated<br />

Standby: Device does not participate in the piconet,<br />

occasionally monitoring, not synchronized

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