チャネル状態の報告方法およびその装置

Japanese Patent JP5711384

B2

There is disclosed method for reporting channel state so as to report channel state based upon CSI-RS. The method includes: a UE detecting configuration information of Channel State Information-Reference Signal (CSI-RS), determining according to detection result the number of ports required to report channel state based upon CSI-RS, the UE determining CSI-RS based PMI feedback scheme to be adopted in preset corresponding relationship between the number of ports and feedback scheme upon determining that the eNB is to map data of Physical Downlink Shared Channel (PDSCH) onto P (number) CSI-RS ports for transmission in a codebook-based precoding scheme, wherein the codebook-based precoding scheme is a scheme as represented in the formula of y 0 ‹® y P - 1 = W ‹ s , wherein W represents a codebook consisted of a precoding matrix, S is PDSCH data consisted of data layers whose quantity is equal to value of Rank Indication (RI) and y 0 ‹® y P - 1 represents a vector consisted of data on P (number) CSI-RS ports; and the UE calculating and reporting channel state information according to the determination result. The invention further discloses apparatus for performing the method.

WO/2014/175430	RECEPTION APPARATUS, RECEPTION METHOD AND RECEPTION PROGRAM
JP2015530003	Channel State Information (CSI) Feedback and Codebook Subsampling
WO/2004/086706	APPARATUS AND METHOD FOR ESTIMATING A PLURALITY OF CHANNELS

Su Shin
Takaaki Aki
Abduction
So Yasushi

JP2013541196A

April 30, 2015

November 30, 2011

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Da Tang Mobile Communications Equipment Co., Ltd.

H04J99/00; H04B7/06; H04J1/00; H04J11/00

CMCC, CATT,On non-PMI based feedback in Rel-10,3GPP TSG-RAN WG1 Meeting #63,2010年11月15日,R1-106313
New Postcom,Remaining details in CSI-RS signaling and PDSCH muting design,3GPP TSG-RAN WG1 Meeting #63,2010年11月15日,R1-105938

Takashi Tsuno
Mitsuharu Oda
Kato coming

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