A method for assessing the quality of a communication channel in a multi-domain network includes transmitting, from a device, a probe signal onto the communication channel. The transmitting coordinated with the transmission of at least one alien probe signal by another network node. Subsequently to the transmitting, receiving a mixed feedback signal. The mixed feedback signal including a first component corresponding to the probe signal and a second component corresponding to the at least one alien probe signal. The method further includes extracting the first component from the mixed feedback signal, and assessing the quality of the communication channel on the basis of the extracted first component. The probe signal and the at least one alien probe signal are designed to facilitate their separation after having been superimposed.