A UE is configured to transmit RI using assigned periodic RI reporting intervals occurring during an on-duration, and continuing to transmit RI using at least one RI reporting interval after the end of an on-duration. A method in a Long Term Evolution LTE user equipment, UE, with wireless telecommunications capability, comprises: beginning to transmit a rank indicator (RI) using one of: an assigned periodic reporting resource that precisely aligns with the start of an on-duration of a discontinuous reception, DRX, operation mode of the UE; an assigned periodic reporting resource that immediately precedes the start of the on-duration; and a first assigned periodic reporting resource after the start of the on-duration.