Apparatus and method for controlling data rate in communication system using multi-hop scheme

A data transmission rate control device in a communication system using a multi-hop scheme and a method thereof are provided to control a data transmission rate efficiently between a BS(Base Station) and an RS(Relay Station) by using channel information between the BS and the RS and between the RS and an MS(Mobile Station), thereby solving a problem that data are continuously accumulated in the RS. A channel information receiver(560) receives channel information of an RS and channel information of an MS from the RS. A data transmission rate calculator(520) calculates a data transmission rate to be transmitted to the RS by using the channel information of the MS and the channel information of the RS. An adaptive coding unit(540) generates data to be transmitted to the RS according to the calculated data transmission rate. A transmitter(550) transmits the generated data to the RS.