1. A method for determining a window size in a wireless communication system, the method comprising:identifying a number of radio resource blocks (nRB) on a time-frequency domain and a modulation and coding scheme (MCS) assigned to a user equipment (UE) indicated by resource allocation information received from a base station, wherein the MCS is updated based on a throughput autocorrelation of the UE;
determining an uplink data rate based on a transport block size (TBS) corresponding to the identified nRB and the MCS;
determining whether a maximum transmission data size of an internet session including a wireless link between the UE and the base station is the window size for the internet session based on the uplink data rate; and
in response to determining the window size for the internet session being equal to the maximum transmission data size of the internet session including the wireless link, transmitting uplink data through the internet session based on the determined window size.