CoMP mode data transfer mode under limited capacity

The invention discloses a CoMP mode data transfer mode under limited capacity. The realization method of the CoMP mode data transfer mode comprises the following steps: an X2 interface is introduced to transmit data information between base stations, an S1 interface and the X2 interface are combined, a CoMP user is divided into a CoMP-CB user and a CoMP-JP user according to used cooperative transmission technology, then data is divided into CoMP-CB data, CoMP-JP data and exchange data according to user type, the exchange data is a part of the CoMP-JP user data, a central control unit completes the task of distributing the size of various types of data for each base station, through solving a linear optimal equation, an optimal data distribution scheme is obtained, the central control unit transmits various type of data to each base station through an S1 interface according to the scheme, the base stations complete the interaction of the exchange data through the X2 interface, finally in the condition of the limited capacity of the S1 and X2 interfaces, the use of the interface capacity is maximized, and the network throughput is raised. The CoMP mode data transfer mode can be used in the making of the data transmission mode of CoMP technology in an LTE network.