Patent ID: 7706406

Claim:
A method of transmitting data in a wireless communication system, the method comprising: receiving information corresponding to a data amount of each buffer of a plurality of logical channels and a characteristic of data to be transmitted from each of a plurality of logical channels, wherein the characteristic of data indicates whether or not the data is a re-transmission data; and selecting data to transmit from one of the plurality of logical channels based on the received information, wherein the selecting the data comprises: determining which ones of the plurality of logical channels include the re-transmission data in a buffer corresponding to a specific logical channel; and after the determining which ones of the logical channels include the re-transmission data, when each buffer of the plurality of logical channels does not have the re-transmission data, selecting one of the plurality of logical channels based on priorities of each of the logical channels, when one or more buffers of the plurality of logical channels have the re-transmission data, selecting one of the plurality of logical channels among the plurality of logical channels having the re-transmission data, wherein the selected logical channel has a highest priority among the plurality of logical channels having the re-transmission data; and sending the data to a transport channel.