SPC Adaptive cooperative communication system between cells using spatial phase coding in heterogeneous network and adaptive cooperative communication method using the same

摘要

The present invention relates to an inter-cell adaptive cooperative communication system using spatial phase coding (SPC) in a heterogeneous network (HetNet) and a cooperative communication method using the same. According to the present invention, a cooperative communication method in a HetNet including a microcell and a plurality of small cells comprises the steps of: allowing a first small base station in a first small cell to receive a channel state with a macro base station and a channel state with a plurality of small base stations from a mobile terminal and check the location of the mobile terminal and a phase relation between channels based on the channel state; when the mobile terminal is placed on a boundary between the first and second small cells, generating first feedback information based on a phase difference between a first channel with the first small base station and a second channel with a first antenna in the macro base station, and generating second feedback information based on a phase difference between a third channel with the second small base station in a second cell and a fourth channel with a second antenna in the macro base station; transmitting the first and second feedback information to the macro base station; and allowing the mobile terminal to receive a first signal from the first small base station and the first antenna, receive a second signal from the second small base station and the second antenna, and receive the first and second signals, on which each precoding vector corresponding to the first and second feedback information is reflected, from the first and second antennas, respectively. Accordingly, complex interference scenarios existing in a HetNet system are relieved, thereby increasing reliability of a HetNet-based wireless communication system.