Downlink precoding method and data interacting method for coordinated multi-point transmission system and apparatus

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United States of America

PATENT NO 9374138
SERIAL NO

14139206

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Abstract

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Embodiments of the present invention provide a downlink precoding method and data interacting method for coordinated multi-point transmission system and apparatus. The downlink precoding method includes: acquiring a precoding matrix indicator by a cooperating point and determining the precoding matrix of the cooperating point according to the precoding matrix indicator, the number of columns of the precoding matrix of the cooperating point being less than that of columns of the precoding matrix of a serving point; and performing, by the cooperating point, downlink precoding to the data to be transmitted according to the determined precoding matrix of the cooperating point. With the methods and apparatuses of the embodiments of the present invention, as the cooperating points participate only in the transmission of data of part of layers in the coordinated scenarios, the complexity of calculation and the feedback overhead are lowered in the UE end.

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Patent Owner(s)

Patent OwnerAddressTotal Patents
FUJITSU LIMITEDKAWASAKI18047

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Wang, Yi Beijing, CN 409 4578
Wu, Jianming Beijing, CN 171 1026
Xu, Yueqiao Beijing, CN 13 8
Zhou, Hua Beijing, CN 231 964

Cited Art Landscape

Patent Info (Count) # Cites Year
 
ALCATEL LUCENT (1)
2011/0028,156 METHOD AND DEVICE FOR CONTROLLING THE COORDINATED TRANSMISSION FOR DOWNLINK SIGNALS IN A WIRELESS TELECOMMUNICATION NETWORK 7 2009
 
TEXAS INSTRUMENTS INCORPORATED (1)
2010/0273,495 Predecoding for Joint Processing Coordinated Multi-Point Transmission 18 2010
 
LG ELECTRONICS INC. (2)
* 2010/0309,998 METHOD FOR TRANSMITTING PRECODED SIGNAL IN COLLABORATIVE MULTIPLE-INPUT MULTIPLE-OUTPUT COMMUNICATION SYSTEM 16 2008
* 2013/0078,913 METHOD OF TERMINAL TRANSMITTING SOUNDING REFERENCE SIGNAL ON THE BASIS OF APERIODIC SOUNDING REFERENCE SIGNAL TRIGGERING AND METHOD FOR CONTROLLING UPLINK TRANSMISSION POWER TO TRANSMIT APERIODIC SOUNDING REFERENCE SIGNAL 36 2011
* Cited By Examiner

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