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 an uplink resource for data to be transmitted to the base station is available, when a buffer status report to be transmitted to the base station is triggered;
• and
• a transceiver configured to transmit an uplink packet including the buffer status report using the uplink resource in response to the uplink resource being available, and transmitting a scheduling request to the base station in response to the uplink resource not being available for a predetermined time duration, wherein the scheduling request is used for requesting an uplink resource for the buffer status report.

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

• in response to an uplink resource for data to be received from the UE being available, receiving an uplink packet including a buffer status report from the UE using the uplink resource;
• and
• in response to the uplink resource not being available for a predetermined time duration, receiving a scheduling request from the UE, wherein the scheduling request is received for requesting an uplink resource for the buffer status report.