Bluetooth
Bluetooth
Bluetooth
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Piconet Communication<br />
• Synchronous data on synchronous connection oriented (SCO) link<br />
– Time-bounded Time bounded voice traffic<br />
– Transmitted over reserved intervals<br />
– Once connection established, master and slaves may send without<br />
being polled<br />
• Asynchronous data on asynchronous connectionless link (ACL)<br />
(primarily for packet data)<br />
– Master controls bandwidth and how much bandwidth given to each<br />
slave<br />
– Slave must be polled before they can transmit data<br />
– Multislot packet can be used (3 or 5)<br />
– Data packet protected by automatic retransmission query (ARQ)<br />
• Different master-slave master slave pairs (same piconet) piconet)<br />
may use different link<br />
types<br />
• Link type may change arbitrarily during a session<br />
Nguyen Tuan Nam/WNC 2010 8
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