Method and apparatus for communicating data packets in a cloud cell

A method for transmitting data by a second base station in a wireless communication system, the method comprising:

• receiving data;
• identifying whether a first base station is involved in a transmission of the data;
• performing a radio link control (RLC) layer processing and a medium access control (MAC) layer processing on the data which is packet data convergence protocol (PDCP) layer processed by the first base station, if the first base station and the second base station are involved in the transmission of the data;
• performing a PDCP layer processing, a RLC layer processing and a MAC layer processing on the data, if the first base station is not involved in the transmission of the data;
• and
• transmitting the PDCP layer, the RLC layer, the MAC layer processed data to a mobile station.

A first base station for transmitting data in a wireless communication system, the first base station comprising:

• a transceiver configured to receive and transmit data over a network;
• and
• a controller configured to:
• identify whether a second base station is involved in a transmission of the data;
• perform a packet data convergence protocol (PDCP) layer processing on the data and transmitting the PDCP layer processed data to the second base station, if the first base station and the second base station are involved in the transmission of the data;
• and
• perform the PDCP layer processing, a radio link control (RLC) layer processing and a medium access control (MAC) layer processing on the data and transmitting the PDCP layer, the RLC layer, the MAC layer processed data to a mobile station, if the second base station is not involved in the transmission of the data.

A second base station for transmitting data in a wireless communication system, the second base station comprising:

• a transceiver configured to receive and transmit data over a network;
• and
• a controller configured to:
• control the transceiver to receive the data;
• identify whether a first base station is involved in a transmission of the data;
• perform a radio link control (RLC) layer processing and a medium access control (MAC) layer processing on the data which is packet data convergence protocol (PDCP) layer processed by the first base station, if the first base station and the second base station are involved in the transmission of the data;
• perform a PDCP layer processing, a RLC layer processing and a MAC layer processing on the data, if the first base station is not involved in the transmission of the data;
• and
• control the transceiver to transmit the PDCP layer, the RLC layer, the MAC layer processed data to a mobile station.