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Channel state information transmission method and device

A technology of channel state information and transmission method, applied in the field of channel state information transmission, can solve problems such as simultaneous transmission of CSI

Active Publication Date: 2012-01-18
DATANG MOBILE COMM EQUIP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0038] Embodiments of the present invention provide a channel state information transmission method and device for solving the problem of how to simultaneously transmit CSI of multiple downlink carriers

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

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example 1

[0077] Example 1: The terminal selects the CQI of one codeword among multiple codewords as the compressed CSI, and discards the CQI of the remaining codewords.

[0078] Example 2: The terminal selects the CQI of one codeword among multiple codewords, determines the indicator information of the codeword corresponding to the selected CQI, and uses the CQI of the selected codeword and the indicator information as compressed CSI, Discard the CQI of the remaining codewords;

[0079] Example 3: The terminal selects the CQI of one codeword among multiple codewords, and determines the 1 or 2-bit spatial difference value of the CQI of the remaining codewords with respect to the CQI of the selected codeword, and compares the CQI of the selected codeword to The spatial difference value is used as the compressed CSI;

[0080] Example 4: The terminal determines the average value of the CQI of each codeword in the multiple codewords as the compressed CSI.

[0081] Specifically, the terminal determ...

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Abstract

The embodiment of the invention discloses a channel state information transmission method and device and relates to the technical field of radio communication, and the method and device provided by the invention are used for solving the problem of how to simultaneously transmit CSI (Channel State Information) of a plurality of downlink carriers. The method comprises: determining the downlink carriers needing CSI compression in the plurality of downlink carriers needing to feed back the CSI in a current uplink sub-frame by a terminal; compressing the CSI of the downlink carriers which need the CSI compression; and feeding back the compressed CSI corresponding to the downlink carriers needing the CSI compression, and the CSI corresponding to the downlink carriers, except for the downlink carriers needing the CSI compression, in the plurality of downlink carriers needing to feed back the CSI in the current uplink sub-frame, to a base station in the current uplink sub-frame. The method and the device can be used for realizing the scheme of simultaneously transmitting the CSI of the plurality of downlink carriers in a same uplink sub-frame, so that the base station can simultaneously obtain the CSI of the plurality of downlink carriers to improve the accuracy of downlink scheduling.

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] For the Long Term Evolution Advanced (LTE-A) system, in order to support a wider system bandwidth than the Long Term Evolution (LTE) system, some spectrums allocated to the existing system can be aggregated to make up The large bandwidth is used for long-term evolution multi-carrier systems, that is, Carrier Aggregation (CA) technology. At this time, the uplink and downlink carriers in the system can be configured asymmetrically, that is, the user may occupy N1≥1 carrier for downlink transmission, and N2≥1 carrier for uplink transmission, such as figure 1 Shown. [0003] In the LTE-A version 10 (Rel-10) CA system, in order to effectively perform the carrier scheduling and link adaptation process, the base station needs to obtain the channel state information (Channel state ...

Claims

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Application Information

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IPC IPC(8): H04L1/06H04L1/00H04L1/16
CPCH04W8/00H04L5/0057H04L1/0029H04W72/1231H04L1/06H04W28/06H04L1/00H04L1/16H04W72/12
Inventor 高雪娟沈祖康林亚男
Owner DATANG MOBILE COMM EQUIP CO LTD
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