Multipoint coordinated companion method and device

The invention provides a multipoint coordinated companion method and device. The multipoint coordinated companion method includes: a target user side estimates a signal channel and an interference channel of the moment and calculates a signal precoding matrix indicator (PMI) according to the signal channel; the target user side corrects the interference channel of the moment and calculates a worst companion precoding indicator (WCI) according to the corrected interference channel; and the target user side reports the PMI and the WCI to a corresponding service base station, so as to initiate a coordinated companion request, and the service base station exchanges the WCI with a coordinated base station for the coordinated base station to enter multipoint coordinated companion flow. The multipoint coordinated companion method in the invention can effectively reduce influence of system delays and time sequences on coordinated companion, so that the PMI and the WCI which are companied to be well matched, thereby improving accuracy of precoding calculation, and well improving the throughput capacity and spectral efficiency of cell edge users.