Channel state information transmission method and device
A channel state information and transmission method technology, applied in the field of channel state information transmission, can solve the problems of meaningless dynamic transmission point selection scheme and high feedback complexity
Active Publication Date: 2013-11-06
DATANG MOBILE COMM EQUIP CO LTD
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Problems solved by technology
The dynamic transmission point selection scheme actually only needs the channel state information of one transmission point. In order to support other schemes, the information of other transmission points also needs to be fed back, but it has no meaning for the dynamic transmission point selection scheme.
The JT scheme supports high-rank transmission and will not bring obvious performance improvement, but it will bring high complexity to the feedback. Therefore, the feedback supporting the JT scheme only needs the channel state information of RANK1 of each transmission point
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[0061] In view of the above-mentioned problems in the prior art, the embodiment of the present invention proposes a channel state information transmission scheme, which enables the UE to use the periodic report mode supporting coordinated multi-point CoMP transmission to feed back channel state information, thereby realizing a periodic channel supporting CoMP transmission Status information feedback.
[0062] It should be noted that in a TDD system, an eNB (evolved NodeB, or base station) can obtain some or all of the downlink channels through the uplink sounding reference signal (SRS) channel estimation value and the channel reciprocity. The spatial characteristics. For example, if each antenna in the transmission point achieves better uplink and downlink reciprocity calibration, it is not necessary to feed back the Precoding Matrix Indicator (PMI) information of each transmission point. If the antennas between the transmission points achieve better For the reciprocal calibrati...
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The invention discloses a channel state information transmission method and device. The feedback method steps as follows: a user device determines the channel state information on the basis of a channel estimated value; and the user device feeds back the channel state information by using a periodic report mode supporting CoMP (Coordinated Multi-Point) transmission. The receiving method comprises steps as follows: a network device receives the channel state information fed back by the user device by using the periodic report mode supporting CoMP transmission; and the network device carries out processing according to the channel state information. The embodiment of the invention implements the feedback of the channel state information on the premise of supporting CoMP transmission.
Description
Technical field [0001] The present invention relates to the field of wireless communication, and in particular to a method and equipment for transmitting channel state information. Background technique [0002] LTE-A (Long Term Evolution-Advanced, the follow-up evolution of long term evolution technology) adopts co-frequency networking. While greatly improving the spectrum utilization rate, it will also cause severe fading of user signals at the edge of the cell, and will also suffer high The interference from other cells will seriously affect the experience of edge users if the signal fading and interference problems are not dealt with. Coordinated Multiple Point (CoMP) technology introduces information exchange and joint transmission between multiple cells, which can not only improve signal quality but also reduce inter-cell interference, thereby greatly improving the data transmission performance of cell edge users. [0003] The current coordinated multi-point transmission sche...
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IPC IPC(8): H04L1/00H04B7/06
Inventor 张然然高秋彬彭莹陈文洪李辉
Owner DATANG MOBILE COMM EQUIP CO LTD