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Title:
COMMUNICATION SYSTEM AND METHOD, BASE STATION, AND USER TERMINAL
Document Type and Number:
WIPO Patent Application WO/2016/067318
Kind Code:
A1
Abstract:
Provided a method in a mobile communication system comprising a base station adapted to create a precoding matrix for applying to data to be transmitted to a user terminal by using a channel estimate determined from a Reference Signal (RS) transmitted from the user terminal to the base station, the user terminal being adapted to transmit to the base station a Channel State Information (CSI) report. Determining based on the CSI report values of an interference plus noise covariance matrix. Estimating based on this value and a base station created precoding matrix a SINR value which is then used to determine amodulation and coding scheme (MCS) and transmitting the precoded data by using the MCS from the base station to the UEs.

Inventors:
PITAKDUMRONGKIJA BOONSARN (JP)
ISHII NAOTO (JP)
Application Number:
PCT/JP2014/005468
Publication Date:
May 06, 2016
Filing Date:
October 29, 2014
Export Citation:
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Assignee:
NEC CORP (JP)
International Classes:
H04L1/00; H04B7/04; H04L25/03
Foreign References:
US20080096488A12008-04-24
EP2187533A12010-05-19
JP2012531132A2012-12-06
JP2011509040A2011-03-17
JP2010537598A2010-12-02
Other References:
Q. H. SPENCER; A. L. SWINDLEHURST; M. HAARDT: "Zero-forcing methods for downlink spatial multiplexing in multiuser MIMO channels", IEEE TRANSACTIONS ON SIGNAL PROCESSING, vol. 52, 2 February 2004 (2004-02-02)
"Technical specification: Physical layer procedures (Release 11", 3GPP TS 36.213 V 11.7.0, June 2014 (2014-06-01)
Attorney, Agent or Firm:
KATO, Asamichi (20-12 Shin-Yokohama 3-chome, Kohoku-ku, Yokohama-sh, Kanagawa 33, JP)
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