Method for allocating uplink resources in a wireless communication system and a device therefor

A device operating as a first eNB in a wireless communication system, the device comprising:

• an RF module;
• and
• a processor configured to control the RF module,
• wherein the processor is configured to transmit uplink (UL) resource allocation information to a second eNB for a user equipment (UE) connected with both the first eNB and the second eNB, to receive buffer size information from the UE, to allocate one or more UL resources to the UE by considering both of the buffer size information and the UL resource allocation information, wherein the UL resource allocation information indicates a ratio of the buffer size to be considered in each eNB.

A method for an evolved-Node B (eNB) operating in a communication system, the method comprising;

• receiving, by a second eNB from a first eNB, uplink (UL) resource allocation information for a user equipment (UE) connected with both the first eNB and the second eNB;
• receiving, by the second eNB, buffer size information from the UE;
• and
• allocating, by the second eNB, one or more UL resources to the UE by considering both of the buffer size information and the UL resource allocation information,
• wherein the UL resource allocation information indicates a ratio of the buffer size to be considered in the second eNB.