A method, performed by a network node associated with at least two wireless communication devices, for scheduling packet transmission over a radio-based medium, said method comprising: - sensing the radio-based medium by estimating a received signal level; wherein each of the at least two wireless communication devices is associated with a respective individual per-device threshold for determining whether the radio-based medium is accessible or free for transmission, and the method further comprises: - evaluating, for each of the at least two wireless communication devices, whether the radio-based medium is accessible or free for transmission based on comparing the received signal level to the respective individual per-device threshold associated with the considered wireless communication device; and - scheduling packet transmission over the radio-based medium based on the evaluating, for each of the at least two wireless communication devices, whether the radio-based medium is accessible or free for transmission, or - allocating access to the radio-based medium for a selected one of the wireless communication devices based on the determining, for each of the at least two wireless communication devices, whether the radio-based medium is accessible or free for transmission, wherein the medium access is based on a Listen-Before-Talk, LBT, medium access procedure, and the scheduling or access allocation is performed based on medium or channel sensing with individual clear channel assessment thresholds, CCATs, for the wireless devices, and the network node provides an individual clear channel assessment threshold, CCAT, for each associated wireless device, a so-called per-device CCAT, and wherein the network node retrieves, for each of the wireless devices, the per device CCAT from a database to effectuate CCAT configuration for the wireless device, and the network node retrieves, for each of the wireless devices, the respective threshold by sending a request including information representing the identity of the wireless device to the database holding per-device thresholds and receiving a response including the corresponding threshold, and / or wherein the individual CCAT per device is determined or adjusted based on device-specific information, wherein the information needed for the adjustment is obtained by continuously monitoring parameters of the wireless device, or requesting a report from the wireless device, or setting a trigger condition in the wireless device such that the wireless device sends a report to the network node upon fulfillment of the condition. - sensing the radio-based medium by estimating a received signal level; - evaluating, for each of the at least two wireless communication devices, whether the radio-based medium is accessible or free for transmission based on comparing the received signal level to the respective individual per-device threshold associated with the considered wireless communication device; and - scheduling packet transmission over the radio-based medium based on the evaluating, for each of the at least two wireless communication devices, whether the radio-based medium is accessible or free for transmission, or - allocating access to the radio-based medium for a selected one of the wireless communication devices based on the determining, for each of the at least two wireless communication devices, whether the radio-based medium is accessible or free for transmission,