Title:
REFERENCE SIGNAL TRANSMISSION METHOD FOR DOWNLINK MULTIPLE INPUT MULTIPLE OUTPUT SYSTEM
Document Type and Number:
WIPO Patent Application WO/2010/016668
Kind Code:
A3
Abstract:
A reference signal transmission method in a downlink MIMO system is disclosed. The downlink MIMO system supports a first UE supporting N transmission antennas among a total of M transmission antennas (where M > N) and a second UE supporting the M transmission antennas. The method includes transmitting, by a base station (BS), subframe-associated information which designates a first subframe in which data for the first UE and the second UE is transmitted and a second subframe in which data only for the second UE can be transmitted within a radio frame having a plurality of subframes, and transmitting the first subframe and the second subframe. Reference signals corresponding to antenna ports '0' to 'N-1' of the N antennas are mapped to the first subframe, and reference signals corresponding to antenna ports '0' to 'M-1' of the M antennas are mapped to the second subframe.
Inventors:
LEE JUNG HOON (KR)
SEO DONG YOUN (KR)
KIM KI JUN (KR)
AHN JOON KUI (KR)
SEO DONG YOUN (KR)
KIM KI JUN (KR)
AHN JOON KUI (KR)
Application Number:
PCT/KR2009/004064
Publication Date:
April 15, 2010
Filing Date:
July 22, 2009
Export Citation:
Assignee:
LG ELECTRONICS INC (KR)
LEE JUNG HOON (KR)
SEO DONG YOUN (KR)
KIM KI JUN (KR)
AHN JOON KUI (KR)
LEE JUNG HOON (KR)
SEO DONG YOUN (KR)
KIM KI JUN (KR)
AHN JOON KUI (KR)
International Classes:
H04B7/155; H04B7/04
Domestic Patent References:
| WO2007117127A1 | 2007-10-18 | |||
| WO2004064295A2 | 2004-07-29 |
Foreign References:
| KR20060035941A | 2006-04-27 |
Other References:
See also references of EP 2238693A4
Attorney, Agent or Firm:
KIM, Yong In et al. (7th Floor Hyundae Building,175-9, Jamsil-dong, Songpa-ku, Seoul 138-861, KR)
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