Methods and apparatuses are provided for facilitating determination of a state of a receiver buffer. A method may include receiving, at a first time, a data packet of a data stream transmitted by a sending apparatus. The method may further include generating, at a second time, a periodically generated receiver reporting message. The method may additionally include determining an interval time defining an interval between the first time and the second time. The method may also comprise causing an indication of the interval time to be sent to the sending apparatus. Corresponding apparatuses are also provided.