Title:
USER EQUIPMENT AND CHANNEL STATUS INFORMATION FEEDBACK METHOD
Document Type and Number:
WIPO Patent Application WO/2011/158943
Kind Code:
A1
Abstract:
Disclosed is a user equipment and channel status information feedback method. The channel status information feedback method, which is employed in a Coordinated Multi-Point System, comprises the steps of: acquiring small-scale channel status information (H' = H'1, H'2,..., H'K) between the user equipment and all base stations active in coordination; acquiring large-scale channel status information (Ii, where i = 1,..., K) between the user equipment and each base station active in coordination; acquiring CQI (where CQIi = Ii • |H'|, i = 1,..., K) between the user equipment and each base station active in coordination, on the basis of the small-scale channel status information and the large-scale channel status information; using the acquired CQI to update a source code book (C) and acquiring the post-update code book (1); using the post-update code book to carry out a quantization process and acquire CDI; and sending feedback of CDI and CQI corresponding to each base station active in coordination to the base station, and participating in channel rebuilding by the base station. Rates of utilization of feedback information are improved by the present disclosure.
Inventors:
NAGATA SATOSHI (JP)
KISHIYAMA YOSHIHISA (JP)
YUN XIANG (CN)
ZHU JIANCHI (CN)
SHE XIAOMING (CN)
CHEN LAN (CN)
KISHIYAMA YOSHIHISA (JP)
YUN XIANG (CN)
ZHU JIANCHI (CN)
SHE XIAOMING (CN)
CHEN LAN (CN)
Application Number:
PCT/JP2011/063956
Publication Date:
December 22, 2011
Filing Date:
June 17, 2011
Export Citation:
Assignee:
NTT DOCOMO INC (JP)
NAGATA SATOSHI (JP)
KISHIYAMA YOSHIHISA (JP)
YUN XIANG (CN)
ZHU JIANCHI (CN)
SHE XIAOMING (CN)
CHEN LAN (CN)
NAGATA SATOSHI (JP)
KISHIYAMA YOSHIHISA (JP)
YUN XIANG (CN)
ZHU JIANCHI (CN)
SHE XIAOMING (CN)
CHEN LAN (CN)
International Classes:
H04W16/28; H04W24/10
Foreign References:
| JP2009033744A | 2009-02-12 |
Other References:
LG ELECTRONICS INC.: "System level performance with CoMP CB", 3GPP TSG RAN WG1 MEETING #60, R1-101354, 22 February 2010 (2010-02-22) - 26 February 2010 (2010-02-26), pages 1 - 6, XP050419032
YONG CHENG ET AL.: "A Scalable Limited Feedback Design for Network MIMO Using Per-Cell Codebook", IEEE WIRELESS COMMUNICATIONS AND NETWORKING CONFERENCE (WCNC), 2010, XP031706711
TEXAS INSTRUMENTS: "Further Consideration on CoMP Feedback", 3GPP TSG RAN WG1 57BIS, R1-092397, 29 June 2009 (2009-06-29) - 3 July 2009 (2009-07-03), XP050350912
YONG CHENG ET AL.: "A Scalable Limited Feedback Design for Network MIMO Using Per-Cell Codebook", IEEE WIRELESS COMMUNICATIONS AND NETWORKING CONFERENCE (WCNC), 2010, XP031706711
TEXAS INSTRUMENTS: "Further Consideration on CoMP Feedback", 3GPP TSG RAN WG1 57BIS, R1-092397, 29 June 2009 (2009-06-29) - 3 July 2009 (2009-07-03), XP050350912
Attorney, Agent or Firm:
AOKI, Hiroyoshi et al. (JP)
Hiroyoshi Aoki (JP)
Hiroyoshi Aoki (JP)
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