Title:
MOBILE TERMINAL DEVICE, WIRELESS BASE STATION AND WIRELESS COMMUNICATION METHOD
Document Type and Number:
WIPO Patent Application WO/2012/121008
Kind Code:
A1
Abstract:
Provided are a mobile terminal device, wireless base station and wireless communication method capable of generating accurate precoding weights in coordinated multi-point transmission. According to this wireless communication method, in this mobile terminal device (10), channel estimation is performed using a downlink reference signal, a PMI is selected using the obtained channel estimation value, an IQI is measured using at least the channel estimation value and the PMI, and at least the PMI and IQI are transmitted to the wireless base station; in the wireless base station, pre-coding weights are generated using the PMI and the IQI, and coordinated multi-point transmission is performed utilizing MIMO transmission which uses the pre-coding weights.
Inventors:
BENJEBBOUR ANASS (JP)
NAGATA SATOSHI (JP)
NAGATA SATOSHI (JP)
Application Number:
PCT/JP2012/054174
Publication Date:
September 13, 2012
Filing Date:
February 21, 2012
Export Citation:
Assignee:
NTT DOCOMO INC (JP)
BENJEBBOUR ANASS (JP)
NAGATA SATOSHI (JP)
BENJEBBOUR ANASS (JP)
NAGATA SATOSHI (JP)
International Classes:
H04B7/06; H04B7/04; H04J11/00; H04J99/00; H04W16/28; H04W24/10; H04W36/18
Domestic Patent References:
| WO2010140298A1 | 2010-12-09 |
Foreign References:
| JP2011035912A | 2011-02-17 | |||
| JP2002238073A | 2002-08-23 |
Other References:
"Requirements for Evolved UTRA and Evolved UTRAN", 3GPP TR 25.913
M. SADEK ET AL.: "A leakage-based precoding scheme for downlink multi-user MIMO channels", IEEE TRANS. WIRELESS COMMUN, vol. 6, no. 5, May 2007 (2007-05-01), pages 1713
See also references of EP 2683093A4
M. SADEK ET AL.: "A leakage-based precoding scheme for downlink multi-user MIMO channels", IEEE TRANS. WIRELESS COMMUN, vol. 6, no. 5, May 2007 (2007-05-01), pages 1713
See also references of EP 2683093A4
Attorney, Agent or Firm:
AOKI, Hiroyoshi et al. (JP)
Hiroyoshi Aoki (JP)
Hiroyoshi Aoki (JP)
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Claims: