A method and a radio network node for enabling a switch between transmission modes for sending downlink signals to a User Equipment, UE. The present invention proposes a simplified method of correlation by removing dependency on the amplitude fluctuations while at the same time maintaining phase relevancy. The device further selects, from the determined feature peers, a set of feature peers for the customer packet to traverse when the service providers associated with the determined feature peers are also associated with the device. It is determined whether a majority of the detectors that are able to come to a decision come to a same decision.