Method and apparatus for buffer status report in mobile communication system

An apparatus in a user equipment (UE) for radio communication with a base station, the apparatus comprising:

• a controller configured to identify whether the UE has an uplink resource allocated for transmission to the base station, if a buffer status report for transmission to the base station has been triggered;
• and
• a transceiver configured to transmit an uplink packet for the buffer status report using the uplink resource if the UE has the uplink resource, and, otherwise, transmitting a scheduling request to the base station if the UE does not have an uplink resource and a first timer has been expired, wherein the first timer starts when the buffer status report is triggered.

A method for radio communication with a user equipment (UE) by a base station, the method comprising:

• if there is an uplink resource allocated for reception from the UE, receiving an uplink packet for a buffer status report from the UE using the uplink resource;
• and
• if, after a predetermined time after the buffer status report is triggered by the UE, an uplink resource has not been allocated to the UE, receiving a scheduling request from the UE, wherein the scheduling request is received if the UE does not have an uplink resource and a first timer has been expired, and wherein the first timer starts when the buffer status report is triggered.