The power saving schemes with UE adaptation to the number of MIMO layers are to allow UE to suspend some RF chains. When the MIMO channels have low rank with receiver observed mutually dependent among antenna chain, UE still has to turn on the RF and baseband processing of all antenna. The mutual information from the MIMO channel is very low. It was agreed in RAN1#98 that the per-DL-BWP configuration of maximum number of DL MIMO layer.