Abstract
JSR82ext (formerly known as JSR82+SCO) is an extension to the ubiQoS project to support the last-meter Bluetooth-based connection for QoS-enabled audio streaming services.
Table of Contents
Bluetooth is an emerging technology in the wireless world and has become the de-facto standard solution for PAN applications. Bluetooth supports two main classes of traffic: unframed data traffic, with guaranteed QoS requirements, and framed data traffic, with best-effort or guaranteed QoS.
Unframed data traffic is carried over SCO and eSCO baseband links, which are point-to-point bi-directional, symmetrical (eSCO links can also be asymmetrical), isochronous, and have a constant bit-rate (the bit-rate is fixed to 64 Kbps for SCO and user-defined for eSCO).
Framed data traffic, instead, is carried over ACL and ASB links. ACL links are bi-directional, connection-oriented, asynchronous or isochronous, and support the specification of QoS settings to indicate the desiderata for the delivery of the data frames. ASB links are connection-less links for broadcasting traffic from the master to all the slaves in the piconet. The ASB-based transmission is best-effort, with no possibility of QoS management.