3.3.5.1 Receiving a QosProbe Frame
When a QosProbe frame is received, the controller MUST first verify that the Test Type field in the QosProbe header is set to 0x02 (that is, the sink returns the probegap test result). If not, the frame MUST be ignored.
Otherwise, the controller MUST attempt to locate a corresponding entry in the Probegap Request Table by matching its identifier against the Sequence Number field in the Base header of the received frame. If one is not found, the frame MUST be ignored.
Otherwise, the associated Per-QosProbe Response timer MUST be stopped. The controller MUST ensure that a high-resolution time stamp is sampled at the time the frame is received. It MUST then return this time stamp with the contents of the Sink Receive Timestamp and Sink Transmit Timestamp fields in the QosProbe header to the higher-layer application or protocol that requested the probegap test. The associated Per-QosProbe Response timer MUST then be stopped, and the corresponding entry MUST be removed from the Probegap Request Table.