Apparatus and method for base station cooperative communication in wireless communication system

A Base Station (BS) cooperative communication method in a wireless communication system, the BS cooperative communication method comprising:

• receiving, by the serving BS, a measurement report indicating signal measurement values of a serving BS and one or more neighboring BSs from a Mobile Station (MS);
• comparing, by the serving BS, a number of downlink beams available for communication between the serving BS and the MS with a reference value;
• determining not to involve the one or more neighboring BSs in the BS cooperative communication for the MS when the number of downlink beams is equal or larger than the reference value;
• comparing the signal measurement values of the one or more neighboring BSs with a first threshold when the number of downlink beams is smaller than the reference value;
• and
• determining to involve one or more neighboring BSs having a signal measurement value higher than the first threshold in the BS cooperative communication for the MS.

A Mobile Station (MS) apparatus performing Base Station (BS) cooperative communication in a wireless communication system, the MS apparatus comprising:

• a measurement unit configured to measure signal quality of a serving BS and one or more neighboring BSs;
• a controller configured to compare a number of downlink beams available for communication between the serving BS and the MS with a reference value, to determine not to involve the one or more neighboring BSs in the BS cooperative communication for the MS when the number of downlink beams is equal to or larger than the reference value, to compare the signal measurement values of the one or more neighboring BSs with a first threshold when the number of downlink beams is smaller than the reference value, and to determine to involve one or more BSs having a signal measurement value larger than the first threshold in the BS cooperative communication for the MS;
• and
• a transmitter configured to transmit a request for changing a member of a BS group for the BS cooperative communication to the serving BS according to a result of the determination.

A Base Station (BS) apparatus performing BS cooperative communication in a wireless communication system, the BS apparatus comprising:

• a receiver configured to receive a measurement report indicating signal measurement values of a serving BS and one or more neighboring BSs from a Mobile Station (MS);
• a controller configured to compare a number of downlink beams available for communication between the serving BS and the MS with a reference value, to determine not to involve the one or more neighboring BSs in the BS cooperative communication for the MS when the number of downlink beams is equal or larger than the reference value, to compare the signal measurement values of the one or more neighboring BSs with a first threshold when the number of downlink beams is smaller than the reference value, and to determine to involve one or more neighboring BSs having a signal measurement value higher than the first threshold in the BS cooperative communication for the MS;
• and
• and a transmitter configured to transmit an instruction for the MS to change members of a BS group for the BS cooperative communication according to a result of the determination.