FEEDBACK METHOD, MOBILE TERMINAL DEVICE, AND WIRELESS BASE STATION DEVICE

申请公布号：EP2627022(A1)

申请号：EP20110830620

申请日期：2011.10.03

申请公布日期：2013.08.14

申请人：

NTT DOCOMO, INC.

发明人：NAGATA, SATOSHI;KAKISHIMA, YUICHI;TAOKA, HIDEKAZU;KUSUME, KATSUTOSHI

分类号：H04J99/00;H04B7/04;H04B7/0452;H04B7/06;H04J11/00;H04L25/03;H04W16/28;H04W24/10

主分类号：H04J99/00

摘要：The present invention makes it possible to generate precoding weights reliably, even in downlink MIMO transmission using a plurality of transmitting antennas. The present invention includes: a first feedback information selection section (109) that, in a mode to include a PTI in a PUCCH and feed back the PTI to a radio base station apparatus for downlink MIMO transmission using a plurality of transmitting antennas, selects the same RI as the last RI that was fed back, when the value of the PTI is changed from 0 to 1; a multiplexer (115) that multiplexes the RI and the PTI after the change on a subframe; and a transmission section that transmits the multiplex signal to the radio base station apparatus by the PUCCH.

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