Patent ID: 8917696

Claim:
A method in a network node of a cellular communication network of enabling a user equipment (UE) to perform measurements, estimations or demodulations, the method comprising: determining Multiple Input Multiple Output (MIMO) mode settings associated with the network node; and transmitting, on a downlink common or shared channel, an indication of available reference signals based on the determined MIMO mode settings to the UE, wherein the indication of available reference signals explicitly or implicitly indicates common reference signals or dedicated reference signals available for said UE measurements, estimations or demodulations, wherein the indication of available reference signals further comprises an indication of reference signal availability based on MIMO modes used in at least one different network node in the cellular communication network operating a neighbor cell, and wherein the indication of available reference signals further indicates whether the available reference signals due to MIMO mode settings of the neighboring cell differ or not from the available reference signals due to MIMO mode settings of the network node.