REPORTING METHOD OF TERMINAL BUFFER STATE REPORT(BSR), OBTAINING METHOD FOR OBTAINING BSR FROM BASE STATION AND CORRESPONDING TERMINAL, BASE STATION, COMMUNICATION SYSTEM

The present invention provides a terminal comprising a first buffer status report table, a second buffer status report table which extends the maximum buffer data amount reportable by the terminal and a transmitter configured to transmit a control signal including a buffer status information, wherein the buffer status information may be mapped information on a logical channel group to a first octet and an index selected from either the first table or the second table to a second octet. The invention further provides a base station comprising a first buffer status report table, a second buffer status report table which extends the maximum buffer data amount reportable by the terminal, a receiver configured to receive a control signal including a buffer status information, the buffer status information may be mapped information on a logical channel group to a first octet and an index selected from either the first table or the second table to a second octet. The invention further provides a communication system including such a terminal and base station.