Patent ID: 8274950

Claim:
A method of transmitting a reception status report in a radio link control (RLC) protocol layer of a user equipment (UE) which receives data transmitted from a base station in a mobile communication system, the method comprising: periodically transmitting the reception status report of at least one first data block in the RLC protocol layer every first time period value (T 1 ) of at least one parameter associated with the reception status report, the at least one first data block being transmitted from the base station; changing the first time period value (T 1 ) of the at least one parameter to a second time period value (T 2 ) if at least one predefined condition is satisfied; and periodically transmitting reception status report of at least one second data block every second time period value (T 2 ) of the at least one parameter, the at least one second data block being transmitted from the base station, wherein the at least one parameter includes a time period value for transmitting the reception status report, wherein the at least one predefined condition is satisfied if intensity of a reference signal transmitted from the base station becomes smaller than a predefined first threshold value, if intensity of a reference signal transmitted from a neighboring base station becomes greater than a predefined second threshold value, or when the user equipment transmits a measurement report message to the base station, and wherein the second time period value (T 2 ) is smaller than the first time period value (T 1 ).