1. A method for transmitting data through a logical channel by a user equipment (UE) in a wireless communication system, the method comprising:determining whether data for the logical channel exists or not;
when the data for the logical channel exists, increasing a token value based on a prioritized Bit Rate (PBR) and time elapsed since the data becomes available for the logical channel; and
when the token value is greater than 0, transmitting the data or a part of the data through the logical channel,
wherein, when there is no data for the logical channel, the token value is not increased.