Patent ID: 6882660

Claim:
A method for repeating data transmission between a reception side and a transmission side in a radio communication system wherein the transmission side includes a first upper layer and a first layer 1 and the reception side includes a second upper layer and a second layer 1 , the method comprising the steps of: a) by the transmission side, measuring a radio environment; b) determining to perform repeated transmission or normal transmission based on a measurement result; c) if it is determined to perform the repeated transmission, by the first upper layer of the transmission side, performing a first data processing; d) by the reception side, receiving data from the transmission side and determining if the repeated transmission or the normal transmission was performed; and e) if the repeated transmission was performed, by the second layer 1 of the reception side, performing a second data processing, wherein the first data processing includes the steps of: by the first upper layer, storing the data in a first storage unit thereof and managing the stored data; by the first upper layer, transmitting transmission information and the stored data to the first layer 1 , the transmission information including information about the repeated transmission; by the first layer 1 , storing the received data in a second storage unit thereof; and by the first layer 1 , transmitting the data to the reception side repeatedly predetermined times based on the transmission information, wherein the predetermined times are determined based on first conditions including bit error rate (BER), signal to noise ratio (SNR), a load status of a transmission side system and quality of service (QoS) of transmitted data, the first conditions measured at the time of data transmission.