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Channel state information transmission method and device

A state information, transmission channel technology, applied in transmission path sub-channel allocation, transmission system, digital transmission system and other directions, can solve problems such as inability to achieve feedback

Inactive Publication Date: 2012-07-04
CHINA ACAD OF TELECOMM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, it is currently impossible to apply the measurement results based on CSI-RS to the transmission scheme based on the downlink physical shared channel, mainly because the feedback of CSI in the CoMP transmission mode cannot be realized

Method used

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  • Channel state information transmission method and device
  • Channel state information transmission method and device
  • Channel state information transmission method and device

Examples

Experimental program
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Embodiment Construction

[0029] In the embodiment of the present invention, it is first assumed that if PMI and RI feedback are configured, the PDSCH or UERS signal transmitted on the (k, l)th resource unit in the UERS resource and the signal transmitted on the (k, l)th resource unit in the CSI-RS resource The result produced is the same. Based on this assumption, the CSI feedback of the joint channel matrix constructed by the terminal after measuring multiple CSI-RS resources can be realized. Realize the transmission of channel state information supporting CoMP transmission.

[0030] This embodiment is applied in CoMP, so one CSI-RS resource corresponds to one point, and the point is a physical point or a virtual point.

[0031] see figure 1 As shown, the flow of the method for the terminal to transmit CSI in this embodiment is as follows:

[0032] Step 101: The terminal receives control signaling sent by the base station instructing the terminal to perform channel information feedback, where t...

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Abstract

The invention discloses a channel state information transmission method used for realizing the transmission of CoMP transmission supporting channel information. The method comprises the following steps that: a terminal receives a control signal sent by a base station and used for indicating the terminal to carry out channel information feedback, wherein the control signal comprises the indication information of a plurality of CSI-RS (Channel State Information-Reference Signal) resources for aggregation feedback; the terminal obtains the plurality of CSI-RS resources based on the indication information to carry out channel estimation, and a channel matrix is constructed according to a channel estimation result; and the terminal determines CSI based on a corresponding relation between each of signals on the plurality of CSI-RS resources and a signal of a UERS (Used Equipment Referral Service) port and according to a preset PDSCH (Physical Downlink Shared Channel) transmission scheme on a CSI reference resource and the constructed channel matrix and transmits the CSI to the base station. The invention also discloses a device for realizing the method.

Description

technical field [0001] The invention relates to the communication field, in particular to a method and a device for transmitting channel state information. Background technique [0002] LTE-A (Long Time Evolved-Advanced, long-term evolution upgrade) adopts the same frequency network, which not only greatly improves the spectrum utilization rate, but also causes the user signal at the edge of the cell to fade seriously and suffer high interference from other cells , if the signal fading and interference problems are not dealt with, it will seriously affect the experience of edge users. The coordinated multiple point (CoMP) technology introduces information interaction 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 schemes can be roughly divided into three ca...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/00H04B7/06
CPCH04L1/0026H04L5/0035H04L5/0048H04B7/024H04B7/0626H04L5/0057H04L1/00H04L5/0053H04B7/0634H04B7/0639H04B7/0643
Inventor 张然然高秋彬
Owner CHINA ACAD OF TELECOMM TECH
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