Title:
BASE STATION
Document Type and Number:
Japanese Patent JP2015198351
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a base station for performing non-orthogonal multiple access, facilitating accurate demodulation at a user device for a desired signal directed to the user device.SOLUTION: OFDM symbols, to be transmitted by a base station in temporally continuous, includes a plurality of mutually non-orthogonal data signals, directed to a plurality of user devices. A reference signal is allocated on a plurality of OFDM symbols intermittently in time. The base station determines downlink data signal transmission power to be used at downlink data signal transmission, according to reception quality of a user device. The base station reduces downlink data signal transmission power, for OFDM symbols to which the reference signal is allocated, is reduced than downlink data signal transmission power, for data signal in OFDM symbols to which the reference signal is not allocated. The base station determines downlink reference signal transmission power to be higher than downlink data signal transmission power, for the data signal in the OFDM symbols to which the reference signal is not allocated.
Inventors:
OWATARI YUSUKE
TAKEDA KAZUAKI
SANO YOSUKE
OKUMURA YUKIHIKO
TAKEDA KAZUAKI
SANO YOSUKE
OKUMURA YUKIHIKO
Application Number:
JP2014075631A
Publication Date:
November 09, 2015
Filing Date:
April 01, 2014
Export Citation:
Assignee:
NTT DOCOMO INC
International Classes:
H04J11/00; H04W52/24; H04W52/32
Domestic Patent References:
| JP2013009291A | 2013-01-10 | |||
| JP2008160822A | 2008-07-10 | |||
| JP2013034112A | 2013-02-14 | |||
| JP2013078096A | 2013-04-25 |
Foreign References:
| WO2007034552A1 | 2007-03-29 | |||
| WO2012169400A1 | 2012-12-13 |
Attorney, Agent or Firm:
Akira Obayashi