Apparatus and method for providing cooperative communication service between macro base station and small cell base station in mobile communication system

A method for providing a cooperative communication service by a first base station (BS) in a mobile communication system, the method comprising:

• establishing a cooperative interface with a serving BS;
• and
• providing a cooperative communication service with the serving BS using the cooperative interface,
• wherein the first BS is included in a BS group including BSs,
• wherein the BS group is generated by grouping the BSs if a number of the BSs is greater than or equal to a threshold value, and the BSs are within a service coverage of the serving BS, and
• wherein the threshold value is determined by considering a system performance to be acquired if a communication service between the serving BS and a BS among the BSs is the cooperative communication service and a system performance to be acquired if the communication service between the serving BS and the BS is not the cooperative communication service.

A serving base station (BS) in a mobile communication system, the serving BS comprising:

• a controller configured to:
• establish a cooperative interface with a first BS among BSs included in at least one BS group, and
• provide a cooperative communication service with the at least one BS group using the cooperative interface,
• wherein the at least one BS group is generated by grouping the BSs if a number of the BSs is greater than or equal to a threshold value, and the BSs are within a service coverage of the serving BS, and
• wherein the threshold value is determined by considering a system performance to be acquired if a communication service between the serving BS and a BS among the BSs is the cooperative communication service and a system performance to be acquired if the communication service between the serving BS and the BS is not the cooperative communication service.

A first base station (BS) in a mobile communication system, the first BS comprising:

• a controller configured to:
• establish a cooperative interface with a serving BS, and
• provide a cooperative communication service with the serving BS using the cooperative interface,
• wherein the first BS is included in a BS group including BSs,
• wherein the BS group is generated by grouping the BSs if a number of the BSs is greater than or equal to a threshold value, and the BSs are within a service coverage of the serving BS, and
• wherein the threshold value is determined by considering a system performance to be acquired if a communication service between the serving BS and a BS among the BSs is the cooperative communication service and a system performance to be acquired if the communication service between the serving BS and the BS is not the cooperative communication service.

A method for providing a cooperative communication service by a second base station (BS) in a mobile communication system, the method comprising:

• receiving a group join request message from a first BS included in a BS group including BSs;
• and
• transmitting a group join response message as a response message to the group join request message to the first BS,
• wherein the group join request message is transmitted if the first BS receives a group information message from a serving BS,
• wherein the BS group is generated by grouping the BSs if a number of the BSs is greater than or equal to a threshold value, and the BSs are within a service coverage of the serving BS, and
• wherein the threshold value is determined by considering a system performance to be acquired if a communication service between the serving BS and a BS among the BSs is the cooperative communication service and a system performance to be acquired if the communication service between the serving BS and the BS is not the cooperative communication service.

A second Base Station (BS) in a mobile communication system, the second BS comprising:

• a transceiver configured to:
• receive a group join request message from a first BS included in a BS group including BSs, and
• transmit a group join response message as a response message to the group join request message to the first BS,
• wherein the group join request message is transmitted if the first BS receives a group information message from a serving BS,
• wherein the BS group is generated by grouping the BSs if a number of the BSs is greater than or equal to a threshold value, and the BSs are within a service coverage of the serving BS, and
• wherein the threshold value is determined by considering a system performance to be acquired if a communication service between the serving BS and a BS among the BSs is the cooperative communication service and a system performance to be acquired if the communication service between the serving BS and the BS is not the cooperative communication service.