Method and apparatus for measuring radio resource usage per traffic class

PURPOSE: A measuring method of a wireless resource by traffic class and a method thereof in a wireless communication system in the use of a PRB are provided to obtain accurate load information necessary for CAC(Call Admission Control). CONSTITUTION: The used amount of a wireless resource is measured in a wireless communications system on IP network(214). The wireless resource is allocated according to a traffic class for a transmission block. The used amount of the radio resource is measured except for data for the transmission block.