The type of connection are used for voice data. There are no retransmissions, but forward error correction can be optionally applied. Each device transmits encoded voice data in the reserved timeslot. A SCO link is a set of reserved timeslots on an existing ACL transport. In SCO type, packets are used to allow Bluetooth devices to establish a connection with periodically reserved frames for their transmissions and hence there are no retransmissions, but forward error correction can be optionally applied. For example, playing a music, we need high data rate to support high quality music but latency and real time are less important. This method is used when data is more important than avoiding latency. ACL packets are retransmitted automatically if unacknowledged, allowing for correction of a radio link that is subject to interference. In this method, packets are transmitted without worrying about time slot This means, two Bluetooth devices, connected as master and slave, can send packets to each other, but neither side expects a packet in any particular time frame. They areĪCL packets are the basis of communication in Bluetooth. The Bluetooth architecture transfer data in two different ways.
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