Patent ID: 9705576
Date: 2017-07-11
CPC Classifications: H04B,H04L,H04W

Claim:
1. A time-division duplex wireless communication method in which a first base station uses multiple antenna ports in multiple-input multiple-output communication with terminals in a first cell, the multiple-input multiple-output communications to the terminals being performed with application of a respective precoder, the method comprising, in the first base station: determining information about a multiple-input multiple-output channel between the first base station and a first terminal; transmitting data to the first terminal via the channel; detecting that the first terminal is subject to interference from a second cell; storing information about the channel and handing over the first terminal to the second cell; obtaining information on a resource allocation to the first terminal in the second cell; finding an interference-reducing precoder on a basis of the information about the channel; selecting a second terminal in the first cell with which to precode communications by the interference-reducing precoder; and performing wireless communications with the second terminal with application of the interference-reducing precoder and using another resource allocation in the first cell which includes said resource allocation to the first terminal in the second cell.