Patent ID: 8706040
Filing Date: 2014-04-22
Classification: H04B

Abstract:
1. A method for avoiding inter-cell interference in a closed-loop multiple-input multiple-output (MIMO) system using a plurality of codebooks, the method being performed by a serving cell and comprising: receiving, from a mobile station (MS), a request for information about one or more codebooks used in one or more neighboring cells generating interference with respect to the MS; transmitting, to the MS, the information about the one or more codebooks used in the one or more neighboring cells among the plurality of codebooks; receiving, from the MS, a restricted precoding matrix index (PMI) indicating a restricted precoding matrix to be not used in the one or more neighboring cells; and transmitting, to the one or more neighboring cells, the restricted PMI, wherein the restricted PMI is determined among the one or more codebooks.