Various example embodiments are disclosed. According to an example embodiment, a technique may include transmitting a scheduling information to a mobile station in a wireless network during a listening window, determining whether an acknowledgement has been received within the listening window from the mobile station that acknowledges receipt of the scheduling information, resetting a size of a next sleep window for the mobile station to an initial sleep window size if the acknowledgement has been received from the mobile station, and increasing a size of the next sleep window for the mobile station if the acknowledgement has not been received from the mobile station within the listening window. In another example embodiment, techniques are disclosed for determining a starting location of a next listening window for a mobile station in a wireless network.