Jqbt: Bluetooth Driver Top Hot!

This approach is insufficient for modern real-time applications where a high-priority sensor alert (BLE notification) may be queued behind a low-priority bulk firmware update (ACL transfer). We propose , a driver topology that implements a "Top" hierarchy policy. This policy mandates that the driver’s entry point (the "top" of the stack) dictates the scheduling logic, ensuring that QoS requirements defined by the user application propagate down to the hardware transport layer without obstruction.

Unlike standard drivers that process HCI commands strictly sequentially, jqbt maintains a "Command Window." If a low-priority command (e.g., Read RSSI ) is pending, and a high-priority Connection Request arrives from the "top," jqbt injects the high-priority command into the next available slot, preempting the lower priority task without violating the HCI specification flow control. jqbt bluetooth driver top