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This paper focuses on the ability of Bluetooth to support Quality of Service (QoS) requirements expressed by QoS sensitive applications. The QoS perceived by the application depends on the efficiency of the scheduling schemes chosen at the medium access layer. This paper focus on two QoS constraints: the importance degree of a message and its delivery deadline. As no existing Bluetooth scheduling simultaneously accounts for these two QoS constraints, the authors define a new Bluetooth global scheduling, called Class-Based Earliest Deadline First (CBEDF). Simulation results show that CB-EDF achieves a good service differentiation and allows the coexistence of messages with different application constraints. By means of simulations, the authors determine the CB-EDF settings that offer a good service differentiation for any traffic distribution.
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