Logical address assignment in a cloud cell

A method of performing a communication by a mobile station (MS) with a plurality of base stations (BSs) forming a cell for the MS, the method comprising:

• receiving, from a first base station (BS) included in the plurality of BSs, information about a first address assigned to the MS in the cell;
• if the cell is updated by a second BS added to the cell, receiving, from the first BS, information about a second address assigned to the MS in the updated cell;
• and
• performing a communication with a plurality of BSs in the updated cell based on the second address,
• wherein the second address is used to identify the MS in the updated cell, and is determined by using unassigned address information of the first BS and unassigned address information of the second BS based on whether the first address is included in the unassigned address information of the second BS.

A first base station (BS) included in a plurality of BSs forming a cell for a mobile station (MS), the first BS comprising:

• a transceiver configured to:
• transmit, to a second BS, a request message including information about a first address assigned to the MS before the cell is updated, if the cell is updated by the second BS added to the cell, and
• receive, from the second BS, a response message including unassigned address information of the second BS and an indicator indicating whether the first address is included in the unassigned address information;
• and
• a processor configured to control the transceiver and assign a second address for identifying the MS in the updated cell to the MS by using the unassigned address information of the second BS and unassigned address information of the first BS based on the indicator.

A mobile station (MS) for performing a communication with a plurality of base stations (BSs) forming a cell for the MS, the MS comprising:

• receiving, from a first base station (BS) included in the plurality of BSs, information about a first address assigned to the MS in the cell;
• if the cell is updated by a second BS added to the cell, receiving, from the first BS, information about a second address assigned to the MS in the updated cell;
• and
• performing a communication with a plurality of BSs in the updated cell based on the second address,
• wherein the second address is used to identifying the MS in the updated cell, and is determined by using unassigned address information of the first BS and unassigned address information of the second BS based on whether the first address is included in the unassigned address information of the second BS.